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Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2011 shares
Document and Entity Information [Abstract]
Entity Registrant Name	SCHLUMBERGER LTD /NV/
Entity Central Index Key	0000087347
Document Type	10-Q
Document Period End Date	Sep. 30, 2011
Amendment Flag	false
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,342,125,999

CONSOLIDATED STATEMENT OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenue
Revenue	$ 10,229	$ 6,845	$ 28,566	$ 18,379
Interest & other income	34	54	94	169
Gain on investment in M-I SWACO	0	1,270	0	1,270
Cost of Revenue:
Research & engineering	266	240	800	662
General & administrative	91	75	326	221
Merger & integration	27	97	93	131
Restructuring & other	0	299	0	299
Interest	70	47	212	146
Income from Continuing Operations before taxes	1,717	1,940	4,453	3,822
Taxes on income	410	209	1,079	600
Income from Continuing Operations	1,307	1,731	3,374	3,222
Income from Discontinued Operations	0		220
Net Income	1,307	1,731	3,594	3,222
Net income (loss) attributable to noncontrolling interests	6	(3)	10	(2)
Net Income attributable to Schlumberger	1,301	1,734	3,584	3,224
Schlumberger amounts attributable to:
Income from Continuing Operations	1,301	1,734	3,364	3,224
Income from Discontinued Operations	0		220
Net Income	$ 1,301	$ 1,734	$ 3,584	$ 3,224
Basic earnings per share of Schlumberger:
Income from Continuing Operations	$ 0.97	$ 1.39	$ 2.49	$ 2.66
Income from Discontinued Operations	0		0.16
Net Income	0.97	1.39	2.65	2.66
Diluted earnings per share of Schlumberger:
Income from Continuing Operations	0.96	1.38	2.46	2.63
Income from Discontinued Operations	0		0.16
Net Income	$ 0.96	$ 1.38	$ 2.62	$ 2.63
Average shares outstanding:
Basic	1,345	1,249	1,352	1,212
Assuming dilution	1,357	1,258	1,365	1,227
Oilfield Services [Member]
Revenue
Revenue	$ 9,546	$ 6,646	$ 26,658	$ 18,180
Cost of Revenue:
Cost of revenue	7,440	5,281	20,945	14,346
Distribution [Member]
Revenue
Revenue	683	199	1,908	199
Cost of Revenue:
Cost of revenue	$ 652	$ 190	$ 1,831	$ 190

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Current Assets
Cash	$ 1,732	$ 1,764
Short-term investments	4,332	3,226
Receivables less allowance for doubtful accounts (2011 - $182; 2010 - $185)	9,493	8,278
Inventories	4,469	3,804
Deferred taxes	148	51
Other current assets	1,086	975
Assets, Current, Total	21,260	18,098
Fixed Income Investments, held to maturity	255	484
Investments in Affiliated Companies	1,222	1,071
Fixed Assets less accumulated depreciation	12,583	12,071
Multiclient Seismic Data	444	394
Goodwill	14,118	13,952
Intangible Assets	4,927	5,162
Other Assets	772	535
Assets, Total	55,581	51,767
Current Liabilities
Accounts payable and accrued liabilities	7,023	6,488
Estimated liability for taxes on income	1,207	1,493
Long-term debt - current portion	2,395	2,214
Short-term borrowings	348	381
Dividends payable	334	289
Liabilities, Current, Total	11,307	10,865
Long-term Debt	8,740	5,517
Postretirement Benefits	1,034	1,262
Deferred Taxes	1,662	1,636
Other Liabilities	1,215	1,043
Liabilities, Total	23,958	20,323
Equity
Common stock	11,606	11,920
Treasury stock	(5,088)	(3,136)
Retained earnings	27,780	25,210
Accumulated other comprehensive loss	(2,798)	(2,768)
Schlumberger stockholders' equity	31,500	31,226
Noncontrolling interests	123	218
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Total	31,623	31,444
Liabilities and stockholders equity, Total	$ 55,581	$ 51,767

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Current Assets
Allowance for doubtful accounts on receivable	$ 182	$ 185

CONSOLIDATED STATEMENT OF CASH FLOWS (Unaudited) - USD ($)
$ in Millions

9 Months Ended

Sep. 30, 2011

Sep. 30, 2010

Cash flows from operating activities:

Net Income

$ 3,594

$ 3,222

Less: Income from discontinued operations

(220)

Adjustments to reconcile net income to cash provided by operating activities:

Depreciation and amortization

^[1]

2,420

1,951

Gain on investment in M-I SWACO

(1,270)

Non-cash charges

144

Earnings of companies carried at equity, less dividends received

(59)

(79)

Deferred income taxes

146

Stock-based compensation expense

203

145

Pension and other postretirement benefits expense

274

224

Pension and other postretirement benefits funding

(359)

(615)

Change in assets and liabilities:

Increase in receivables

^[2]

(1,273)

(539)

Increase in inventories

^[2]

(743)

(21)

Increase in other current assets

^[2]

(103)

(129)

Increase (decrease) in accounts payable and accrued liabilities

^[2]

207

(128)

(Decrease) increase in estimated liability for taxes on income

^[2]

(510)

224

Increase (decrease) in other liabilities

^[2]

129

(26)

Other-net

^[2]

144

(153)

NET CASH PROVIDED BY OPERATING ACTIVITIES

3,744

3,096

Cash flows from investing activities:

Capital expenditures

(2,763)

(1,907)

Multiclient seismic data capitalized

(206)

(241)

Business acquisitions, net of cash acquired

(148)

(154)

Cash acquired in merger with Smith International, Inc.

399

Acquisition of Geoservices, net of cash acquired

(889)

(Purchase) sale of investments, net

(866)

2,620

Other

231

(84)

NET CASH USED IN INVESTING ACTIVITIES

(3,752)

(256)

Cash flows from financing activities:

Dividends paid

(968)

(756)

Proceeds from employee stock purchase plan

208

179

Proceeds from exercise of stock options

218

113

Stock repurchase program

(2,362)

(1,268)

Proceeds from issuance of long-term debt

6,825

646

Repayment of long-term debt

(3,600)

(1,267)

Net decrease in short-term borrowings

(112)

(3)

Other

(616)

NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES

(407)

(2,342)

Cash flows from discontinued operations - investing activities

385

Net (decrease) increase in cash before translation effect

(30)

498

Translation effect on cash

(2)

(1)

Cash, beginning of period

1,764

617

Cash, end of period

$ 1,732

$ 1,114

[1]	Includes multiclient seismic data costs.
[2]	Net of the effect of business acquisitions and divestitures.

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock Issued	Common Stock In Treasury	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Beginning Balance at Dec. 31, 2009	$ 19,229	$ 4,777	$ (5,002)	$ 22,019	$ (2,674)	$ 109
Comprehensive income
Net income	3,222			3,224		(2)
Currency translation adjustments					(29)
Changes in fair value of derivatives					(44)
Deferred employee benefits liabilities					120
Total comprehensive income	3,269
Shares sold to optionees, less shares exchanged	113	(3)	116
Shares granted to Directors	2	1	1
Vesting of restricted stock		(9)	9
Shares issued under employee stock purchase plan	178	49	129
Stock repurchase program	(1,268)		(1,268)
Stock-based compensation cost	145	145
Shares issued on conversion of debentures	320	17	303
Acquisition of Smith International Inc.	9,942	6,880	2,948			114
Acquisition of noncontrolling interests	(5)	3				(8)
Dividends declared (2011 - $0.75; 2010 - $0.63)	(789)			(789)
Tax benefits on stock options	14	14
Other	(34)		39			5
Ending Balance at Sep. 30, 2010	31,116	11,874	(2,803)	24,454	(2,627)	218
Beginning Balance at Dec. 31, 2010	31,444	11,920	(3,136)	25,210	(2,768)	218
Comprehensive income
Net income	3,594			3,584		10
Currency translation adjustments					(51)
Changes in fair value of derivatives					(119)
Deferred employee benefits liabilities					140
Total comprehensive income	3,564
Shares sold to optionees, less shares exchanged	218	(22)	240
Shares granted to Directors	2	1	1
Vesting of restricted stock		(14)	14
Shares issued under employee stock purchase plan	208	53	155
Stock repurchase program	(2,362)		(2,362)
Stock-based compensation cost	203	203
Acquisition of noncontrolling interests	(628)	(547)				(81)
Dividends declared (2011 - $0.75; 2010 - $0.63)	(1,014)			(1,014)
Tax benefits on stock options	12	12
Other	(24)					(24)
Ending Balance at Sep. 30, 2011	$ 31,623	$ 11,606	$ (5,088)	$ 27,780	$ (2,798)	$ 123
Beginning Balance, in shares at Dec. 31, 2010	1,361	1,434	(73)
Comprehensive income
Shares sold to optionees, less shares exchanged, in shares	6		6
Shares issued under employee stock purchase plan, in shares	3		3
Stock repurchase program, in shares	(28)		(28)
Ending Balance, in shares at Sep. 30, 2011	1,342	1,434	(92)

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Dividends declared, per share	$ 0.75	$ 0.63
Retained Earnings
Dividends declared, per share	$ 0.75	$ 0.63

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2011
Basis of Presentation [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying unaudited consolidated financial statements of Schlumberger Limited and its subsidiaries (“Schlumberger”) have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of Schlumberger management, all adjustments considered necessary for a fair statement have been included in the accompanying unaudited financial statements. All intercompany transactions and balances have been eliminated in consolidation. Operating results for the nine-month period ended September 30, 2011 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2011. The December 31, 2010 balance sheet information has been derived from the Schlumberger 2010 financial statements. For further information, refer to the Consolidated Financial Statements and notes thereto, included in the Schlumberger Annual Report on Form 10-K for the year ended December 31, 2010, filed with the Securities and Exchange Commission on February 4, 2011. Certain items from the prior year have been reclassified to conform to the current year presentation.

- Definition

The entire disclosure for organization, consolidation and basis of presentation of financial statements disclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 2-6
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Name Statement of Position (SOP)
-Publisher AICPA
-Number 94-6
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Name FASB Interpretation (FIN)
-Publisher FASB
-Number 46R
-Paragraph 4, 14, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Charges and Credits

9 Months Ended

Sep. 30, 2011

Charges and Credits [Abstract]

Charges and Credits

2. Charges and Credits

Schlumberger recorded the following charges and credits during the first nine months of 2011 and 2010:

2011

Third quarter of 2011:

•

Schlumberger recorded $27 million of pretax merger and integration-related charges ($23 million after-tax) in connection with the acquisitions of Smith International, Inc. (“Smith”) and Geoservices. This amount is classified in Merger & integration in the Consolidated Statement of Income.

Second quarter of 2011:

	•		Schlumberger made a $50 million grant to the Schlumberger Foundation to support the Foundation’s Faculty for the Future program. This program supports talented women scientists from the developing world by helping them pursue advanced graduate studies in scientific disciplines at leading universities worldwide. This $50 million charge ($40 million after-tax) is classified in General & administrative in the Consolidated Statement of Income.

	•		Schlumberger recorded $32 million of pretax merger and integration-related charges ($24 million after-tax) in connection with the acquisitions of Smith and Geoservices. This amount is classified in Merger & integration in the Consolidated Statement of Income.

First quarter of 2011:

•

Schlumberger recorded $34 million of pretax merger and integration-related charges ($28 million after-tax) in connection with the acquisitions of Smith and Geoservices. This amount is classified in Merger & integration in the Consolidated Statement of Income.

The following is a summary of the charges recorded during the first nine months of 2011:


			(Stated in millions)
							Consolidated Statement
	Pretax		Tax		Net		of Income Classification
Merger and integration-related costs	$	93	$	17	$	76	Merger & integration
Donation to the Schlumberger Foundation		50		10		40	General & administrative

	$	143	$	27	$	116

2010

Third quarter of 2010:

	•		As a result of the decision to rationalize support costs across the organization as well as to restructure the North America land operations to provide greater operating efficiency, Schlumberger recorded a pretax charge of $90 million ($77 million after-tax).

	•		Following the successful introduction of UniQ, a new generation single-sensor land acquisition system, Schlumberger recorded a $78 million pretax charge ($71 million after-tax), related to the impairment of WesternGeco’s first generation Q-Land system assets.

	•		A pretax and after-tax charge of $63 million primarily relating to the early termination of a vessel lease associated with WesternGeco’s electromagnetic service offering as well as related assets, including a $30 million impairment related to an equity-method investment.

	•		In connection with Schlumberger’s merger with Smith (see Note 4 — Acquisitions), Schlumberger recorded the following pretax charges: $56 million ($55 million after-tax) of merger-related transaction costs including advisory and legal fees, $41 million ($35 million after-tax) relating to employee benefits for change in control payments and retention bonuses, and $38 million ($24 million after-tax) for the amortization of purchase accounting adjustments associated with the write-up of acquired inventory to its estimated fair value.

	•		$40 million pretax ($36 million after-tax) for the early termination of rig contracts and workforce reductions in Mexico due to the slowdown of project activity.

	•		Schlumberger repurchased $352 million of its $650 million 6.50% Notes due 2012 and, as a result, incurred a pretax charge of $28 million ($18 million after-tax).

	•		Schlumberger recorded a pretax gain of $1.27 billion ($1.24 billion after-tax) as a result of remeasuring its previously held 40% equity interest in the M-I SWACO joint venture.

The following is a summary of the charges and credits recorded during the third quarter of 2010:


				(Stated in millions)
										Consolidated Statement
	Pretax			Tax			Net			of Income Classification
Restructuring and Merger-related Charges:
Severance and other	$	90		$	13		$	77		Restructuring & other
Impairment relating to WesternGeco’s first generation Q-Land acquisition system		78			7			71		Restructuring & other
Other WesternGeco-related charges		63			—			63		Restructuring & other
Professional fees and other		56			1			55		Merger & integration
Merger-related employee benefits		41			6			35		Merger & integration
Inventory fair value adjustments		38			14			24		Cost of revenue
Mexico restructuring		40			4			36		Restructuring & other
Repurchase of bonds		28			10			18		Restructuring & other

Total restructuring and merger-related charges		434			55			379

Gain on investment in M-I SWACO		(1,270	)		(32	)		(1,238	)	Gain on Investment in M-I SWACO

	$	(836	)	$	23		$	(859	)

First quarter of 2010:

	•		Schlumberger incurred $35 million of pretax and after-tax merger-related costs in connection with the Smith and Geoservices transactions. These costs primarily consisted of legal and other advisory fees.

	•		During March 2010, the Patient Protection and Affordable Care Act (“PPACA”) was signed into law in the United States. Among other things, the PPACA eliminated the tax deductibility of retiree prescription drug benefits to the extent of the Medicare Part D subsidy that companies, such as Schlumberger, receive. As a result of this change in law, Schlumberger recorded a $40 million charge to adjust its deferred tax assets to reflect the loss of this future tax deduction.

The following is a summary of the charges and credits recorded during the first nine months of 2010:


				(Stated in millions)
										Consolidated Statement
	Pretax			Tax			Net			of Income Classification
Restructuring and Merger-related Charges:
Severance and other	$	90		$	13		$	77		Restructuring & other
Impairment relating to WesternGeco’s first generation Q-Land acquisition system		78			7			71		Restructuring & other
Other WesternGeco-related charges		63			—			63		Restructuring & other
Professional fees and other		91			1			90		Merger & integration
Merger-related employee benefits		41			6			35		Merger & integration
Inventory fair value adjustments		38			14			24		Cost of revenue
Mexico restructuring		40			4			36		Restructuring & other
Repurchase of bonds		28			10			18		Restructuring & other

Total restructuring and merger-related charges		469			55			414

Impact of elimination of tax deduction related to Medicare Part D subsidy		—			(40	)		40		Taxes on income

Gain on investment in M-I SWACO		(1,270	)		(32	)		(1,238	)	Gain on Investment in M-I SWACO

	$	(801	)	$	(17	)	$	(784	)

- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References + Details

Earnings Per Share

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Earnings Per Share

3. Earnings Per Share

The following is a reconciliation from basic earnings per share from continuing operations of Schlumberger to diluted earnings per share from continuing operations of Schlumberger:


							(Stated in millions, except per share amounts)
	2011						2010
	Schlumberger				Earnings per		Schlumberger				Earnings per
	Income from		Average		Share from		Income from				Share from
	Continuing		Shares		Continuing		Continuing		Average Shares		Continuing
	Operations		Outstanding		Operations		Operations		Outstanding		Operations
Third Quarter
Basic	$	1,301		1,345	$	0.97	$	1,734		1,249	$	1.39

Assumed exercise of stock options		—		9				—		7
Unvested restricted stock		—		3				—		2

Diluted	$	1,301		1,357	$	0.96	$	1,734		1,258	$	1.38


	Schlumberger				Earnings per		Schlumberger				Earnings per
	Income from		Average		Share from		Income from				Share from
	Continuing		Shares		Continuing		Continuing		Average Shares		Continuing
	Operations		Outstanding		Operations		Operations		Outstanding		Operations
Nine Months
Basic	$	3,364		1,352	$	2.49	$	3,224		1,212	$	2.66

Assumed conversion of debentures		—		—				3		5
Assumed exercise of stock options		—		10				—		8
Unvested restricted stock		—		3				—		2

Diluted	$	3,364		1,365	$	2.46	$	3,227		1,227	$	2.63

The number of outstanding options to purchase shares of Schlumberger common stock which were not included in the computation of diluted earnings per share, because to do so would have had an antidilutive effect, were as follows:


	(Stated in millions)
	2011		2010
Third Quarter		14		14
Nine Months		6		13

Acquisitions	9 Months Ended
Acquisitions	Sep. 30, 2011
Acquisitions [Abstract]
Acquisitions	4. Acquisitions On August 27, 2010, Schlumberger acquired all of the outstanding shares of Smith, a leading supplier of premium products and services to the oil industry. Schlumberger issued approximately 176 million shares of its common stock which were valued at $9.8 billion at the time of closing, to effect this transaction. Smith reported revenue of approximately $6.8 billion during the first nine months of 2010. On April 23, 2010, Schlumberger completed the acquisition of Geoservices, a privately owned oilfield services company specializing in mud logging, slickline and production surveillance operations, for $915 million in cash. During the first nine months of 2011, Schlumberger made certain acquisitions and investments, none of which were significant on an individual basis, for cash payments, net of cash acquired, of $148 million.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
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-Paragraph F4
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+ Details

Inventory

9 Months Ended

Sep. 30, 2011

Inventory [Abstract]

Inventory

5. Inventory

A summary of inventory follows:


	(Stated in millions)
	Sept. 30,		Dec. 31,
	2011		2010
Raw materials & field materials	$	1,971	$	1,833
Work in process		355		249
Finished goods		2,143		1,722

	$	4,469	$	3,804

Fixed Assets

9 Months Ended

Sep. 30, 2011

Fixed Assets [Abstract]

Fixed Assets

6. Fixed Assets

A summary of fixed assets follows:


	(Stated in millions)
	Sept. 30,		Dec. 31,
	2011		2010
Property, plant & equipment	$	28,960	$	27,212
Less: Accumulated depreciation		16,377		15,141

	$	12,583	$	12,071

Depreciation expense relating to fixed assets was as follows:


	(Stated in millions)
	2011		2010
Third Quarter	$	689	$	603
Nine Months	$	2,019	$	1,708

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References + Details

Multiclient Seismic Data

9 Months Ended

Sep. 30, 2011

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data

7. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the nine months ended September 30, 2011 was as follows:


	(Stated in millions)
Balance at December 31, 2010	$	394
Capitalized in period		206
Charged to expense		(156	)

Balance at September 30, 2011	$	444

Goodwill

9 Months Ended

Sep. 30, 2011

Goodwill [Abstract]

Goodwill

8. Goodwill

In connection with the change in reportable segments as discussed in Note 14 Segment Information, Schlumberger reallocated the goodwill that existed as of December 31, 2010 to the new reporting units on a relative fair value basis.

The changes in the carrying amount of goodwill by reporting unit for the nine months ended September 30, 2011 were as follows:


										(Stated in millions)
	Reservoir			Reservoir
	Characterization			Production			Drilling			Distribution		Total
Balance at January 1, 2011	$	3,381		$	2,351		$	8,150		$	70	$	13,952
Adjustments relating to Smith acquisition		—			13			175			6		194
Other acquisitions		—			—			47			—		47
Divestiture of business		(51	)		—			—			—		(51	)
Impact of changes in exchange rates		(10	)		(8	)		(6	)		—		(24	)

Balance at September 30, 2011	$	3,320		$	2,356		$	8,366		$	76	$	14,118

Intangible Assets

9 Months Ended

Sep. 30, 2011

Intangible Assets [Abstract]

Intangible Assets

9. Intangible Assets

Intangible assets principally comprise technology/technical know-how, tradenames and customer relationships. The gross book value, accumulated amortization and net book value of intangible assets were as follows:


									(Stated in millions)
	Sept. 30, 2011						Dec. 31, 2010
	Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Book Value		Amortization		Value		Book Value		Amortization		Value

Technology/Technical Know-How	$	1,835	$	303	$	1,532	$	1,846	$	215	$	1,631
Tradenames		1,671		107		1,564		1,678		61		1,617
Customer Relationships		1,954		185		1,769		1,963		129		1,834
Other		361		299		62		378		298		80

	$	5,821	$	894	$	4,927	$	5,865	$	703	$	5,162

Amortization expense charged to income was as follows:


	(Stated in millions)
	2011		2010
Third Quarter	$	81	$	46
Nine Months	$	245	$	109

The weighted average amortization period for all intangible assets is approximately 21 years.

Based on the net book value of intangible assets at September 30, 2011, amortization charged to income for the subsequent five years is estimated to be: remainder of 2011 — $81 million; 2012 — $303 million; 2013 — $295 million; 2014 — $286 million; 2015 — $265 million; and 2016 — $255 million.

Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2011

Derivative Instruments and Hedging Activities [Abstract]

Derivative Instruments and Hedging Activities

10. Derivative Instruments and Hedging Activities

Schlumberger is exposed to market risks related to fluctuations in foreign currency exchange rates, commodity prices and interest rates. To mitigate these risks, Schlumberger utilizes derivative instruments. Schlumberger does not enter into derivative transactions for speculative purposes.

Foreign Currency Exchange Rate Risk

As a multinational company, Schlumberger conducts business in approximately 80 countries. Schlumberger’s functional currency is primarily the US dollar, which is consistent with the oil and gas industry. However, outside the United States, a significant portion of Schlumberger’s expenses is incurred in foreign currencies. Therefore, when the US dollar weakens (strengthens) in relation to the foreign currencies of the countries in which Schlumberger conducts business, the US dollar—reported expenses will increase (decrease).

Schlumberger is exposed to risks on future cash flows to the extent that local currency expenses exceed revenues denominated in local currency that are other than the functional currency. Schlumberger uses foreign currency forward contracts and foreign currency options to provide a hedge against a portion of these cash flow risks. These contracts are accounted for as cash flow hedges, with the effective portion of changes in the fair value of the hedge recorded on the Consolidated Balance Sheet and in Accumulated Other Comprehensive Loss. Amounts recorded in Accumulated Other Comprehensive Loss are reclassified into earnings in the same period or periods that the hedged item is recognized in earnings. The ineffective portion of changes in the fair value of hedging instruments, if any, is recorded directly to earnings.

At September 30, 2011, Schlumberger recognized a cumulative net $74 million loss in Equity relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges, the majority of which is expected to be reclassified into earnings within the next twelve months.

Schlumberger is also exposed to changes in the fair value of assets and liabilities, including certain of its long-term debt, which are denominated in currencies other than the functional currency. Schlumberger uses foreign currency forward contracts and foreign currency options to hedge this exposure as it relates to certain currencies. These contracts are accounted for as fair value hedges with the fair value of the contracts recorded on the Consolidated Balance Sheet and changes in the fair value recognized in the Consolidated Statement of Income along with the change in fair value of the hedged item.

At September 30, 2011, contracts were outstanding for the US dollar equivalent of $7.4 billion in various foreign currencies.

Commodity Price Risk

Schlumberger is exposed to the impact of market fluctuations in the price of certain commodities, such as metals and fuel. Schlumberger utilizes forward contracts to manage a small percentage of the price risk associated with forecasted metal purchases. The objective of these contracts is to reduce the variability of cash flows associated with the forecasted purchase of those commodities. These contracts do not qualify for hedge accounting treatment and therefore, changes in the fair value of the forward contracts are recorded directly to earnings.

At September 30, 2011, $38 million of commodity forward contracts were outstanding.

Interest Rate Risk

Schlumberger is subject to interest rate risk on its debt and its investment portfolio. Schlumberger maintains an interest rate risk management strategy that uses a mix of variable and fixed rate debt combined with its investment portfolio and occasionally interest rate swaps to mitigate the exposure to changes in interest rates.

During the third quarter of 2009, Schlumberger entered into an interest rate swap for a notional amount of $450 million in order to hedge changes in the fair value of Schlumberger’s $450 million 3.00% Notes due 2013. Under the terms of this swap, Schlumberger receives interest at a fixed rate of 3.00% annually and pays interest quarterly at a floating rate of three-month LIBOR plus a spread of 0.765%. This interest rate swap is designated as a fair value hedge of the underlying debt. This derivative instrument is marked to market with gains and losses recognized currently in income to offset the respective gains and losses recognized on changes in the fair value of the hedged debt. This results in no net gain or loss being recognized in the Consolidated Statement of Income.

At September 30, 2011, Schlumberger had fixed rate debt aggregating $8.0 billion and variable rate debt aggregating $3.4 billion, after taking into account the effects of the interest rate swaps.

Short-term investments and Fixed income investments, held to maturity, totaled $4.6 billion at September 30, 2011, and were comprised primarily of money market funds, eurodollar time deposits, certificates of deposit, commercial paper, euro notes and Eurobonds, and were substantially all denominated in US dollars. The carrying value of these investments approximated fair value, which was estimated using quoted market prices for those or similar investments.

The fair values of outstanding derivative instruments are summarized as follows:


	(Stated in millions)
	Fair Value of Derivatives
	Sept. 30,		Dec. 31,
	2011		2010		*Consolidated Balance Sheet* Classification
Derivative Assets
Derivatives designated as hedges:
Foreign exchange contracts	$	9	$	4	Other current assets
Foreign exchange contracts		—		37	Other Assets
Interest rate swaps		12		14	Other Assets

	$	21	$	55


Derivatives not designated as hedges:
Commodity contracts	$	—	$	3	Other current assets
Foreign exchange contracts		25		9	Other current assets
Foreign exchange contracts		23		9	Other Assets

	$	48	$	21

	$	69	$	76

Derivative Liabilities
Derivatives designated as hedges:
Foreign exchange contracts	$	19	$	9	Accounts payable and accrued liabilities
Foreign exchange contracts		134		77	Other Liabilities
Interest rate swaps		—		7	Accounts payable and accrued liabilities

	$	153	$	93


Derivatives not designated as hedges:
Foreign exchange contracts	$	20	$	14	Accounts payable and accrued liabilities
Commodity contacts		6		—	Accounts payable and accrued liabilities

	$	26	$	14

	$	179	$	107

The fair value of all outstanding derivatives was determined using a model with inputs that are observable in the market or can be derived from or corroborated by observable data.

The effect on the Consolidated Statement of Income of derivative instruments designated as fair value hedges and those not designated as hedges was as follows:


	(Stated in millions)
	Gain (Loss) Recognized in Income
	Third Quarter					Nine Months						*Consolidated Statement*
	2011			2010		2011			2010			of Income Classification
Derivatives designated as fair value hedges:
Foreign exchange contracts	$	1		$	5	$	8		$	(8	)	Cost of revenue — Oilfield Services
Interest rate swaps		2			10		7			19		Interest expense

	$	3		$	15	$	15		$	11


Derivatives not designated as hedges:
Foreign exchange contracts	$	(12	)	$	43	$	3		$	(2	)	Cost of revenue — Oilfield Services
Commodity contracts		(5	)		1		(7	)		(1	)	Cost of revenue — Oilfield Services

	$	(17	)	$	44	$	(4	)	$	(3	)

The effect of derivative instruments in cash flow hedging relationships on income and other comprehensive income (OCI) was as follows:


	(Stated in millions)
	Gain (Loss) Reclassified from Accumulated OCI into Income
	Third Quarter						Nine Months					*Consolidated Statement*
	2011			2010			2011		2010			of Income Classification
Foreign exchange contracts	$	(171	)	$	186		$	143	$	(149	)	Cost of revenue — Oilfield Services
Foreign exchange contracts		6			(6	)		14		(12	)	Research & engineering

	$	(165	)	$	180		$	157	$	(161	)


	(Stated in millions)
	Gain (Loss) Recognized in OCI
	Third Quarter						Nine Months
	2011			2010			2011		2010
Foreign exchange contracts	$	(258	)	$	217		$	38	$	(205	)

- Definition

The entire disclosure for the entity's entire derivative instruments and hedging activities. Describes an entity's risk management strategies, derivatives in hedging activities and non-hedging derivative instruments, the assets, obligations, liabilities, revenues and expenses arising therefrom, and the amounts of and methodologies and assumptions used in determining the amounts of such items.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 45
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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+ Details

Long-term Debt

9 Months Ended

Sep. 30, 2011

Long-term Debt [Abstract]

Long-term Debt

11. Long-term Debt

A summary of Long-term Debt follows:


	(Stated in millions)
	Sept. 30,		Dec. 31,
	2011		2010
3.30% Senior Notes due 2021	$	1,595	$	—
4.50% Guaranteed Notes due 2014		1,364		1,319
2.75% Guaranteed Notes due 2015		1,357		1,310
1.95% Senior Notes due 2016		1,099		—
4.20% Guaranteed Notes due 2021		1,099		—
5.25% Guaranteed Notes due 2013		682		659
2.65% Guaranteed Notes due 2016		498		—
3.00% Guaranteed Notes due 2013		450		450
Floating Rate Senior Notes due 2014		299		—
9.75% Senior Notes due 2019		—		776
8.625% Senior Notes due 2014		—		272
6.00% Senior Notes due 2016		—		218
Commercial paper borrowings		—		367
Other variable rate debt		287		133

		8,730		5,504
Fair value adjustment — hedging		10		13

	$	8,740	$	5,517

The fair value adjustment presented above represents changes in the fair value of the portion of Schlumberger’s fixed rate debt that is hedged through the use of interest rate swaps.

During the third quarter of 2011 Schlumberger issued $1.1 billion of 1.95% Senior Notes due 2016, $1.6 billion of 3.30% Senior Notes due 2021 and $300 million of Floating Rate Senior Notes due 2014 that bear interest at a rate equal to three-month LIBOR plus 55 basis points per year.

During the first quarter of 2011, Schlumberger repurchased all of the outstanding 9.75% Senior Notes due 2019, the 8.625% Senior Notes due 2014 and the 6.00% Senior Notes due 2016 for approximately $1.26 billion. These transactions did not result in any significant gains or losses.

During the first quarter of 2011, Schlumberger issued $1.1 billion of 4.20% Guaranteed Notes due 2021.

During the first quarter of 2011, Schlumberger issued $500 million of 2.65% Guaranteed Notes due 2016. Schlumberger entered into agreements to swap these dollar notes for euros on the date of issue until maturity, effectively making this a euro denominated debt on which Schlumberger will pay interest in euros at a rate of 2.39%.

At September 30, 2011, Schlumberger had separate committed debt facility agreements aggregating $5.6 billion with commercial banks, of which $3.4 billion was available and unused. This includes $5.0 billion of committed facilities which support commercial paper programs in the United States and Europe, of which $2.0 billion mature in December 2011 and $3.0 billion mature in July 2016. Interest rates and other terms of borrowing under these lines of credit vary from country to country. Borrowings under the commercial paper programs at September 30, 2011 were $2.0 billion ($1.9 billion at December 31, 2010). At September 30, 2011 all of the commercial paper borrowings were classified within Long-term debt — current portion in the Consolidated Balance Sheet.

The estimated fair value of Schlumberger’s Long-term Debt at September 30, 2011 and December 31, 2010, based on quoted market prices, was $9.0 billion and $5.6 billion, respectively.

Income Tax

9 Months Ended

Sep. 30, 2011

Income Tax [Abstract]

Income Tax

12. Income Tax

Income from continuing operations before taxes which was subject to US and non-US income taxes was as follows:


	(Stated in millions)
	Third Quarter				Nine Months
	2011		2010		2011		2010
United States	$	651	$	168	$	1,575	$	312
Outside United States		1,066		1,772		2,878		3,510

	$	1,717	$	1,940	$	4,453	$	3,822

During the third quarter of 2011, Schlumberger recorded pretax charges of $27 million ($23 million in the US and $4 million outside of the US).

During the third quarter of 2010, Schlumberger recorded a net pretax credit of $836 million, consisting of net charges in the US of $63 million and a net pretax credit of $899 million outside of the US.

Schlumberger recorded pretax charges of $143 million during the nine months ended September 30, 2011 ($91 million in the US and $52 million outside of the US).

During the nine months ended September 30, 2010, Schlumberger recorded net pretax charges in the US of $63 million and a net pretax credit of $864 million outside of the US.

These charges are included in the table above and are more fully described in Note 2 — Charges.

The components of net deferred tax assets (liabilities) were as follows:


	(Stated in millions)
	Sept. 30,			Dec. 31,
	2011			2010
Postretirement benefits, net	$	273		$	327
Intangible assets		(1,523	)		(1,674	)
Investments in non-US subsidiaries		(325	)		(353	)
Other, net		61			115

	$	(1,514	)	$	(1,585	)

The above deferred tax balances at September 30, 2011 and December 31, 2010 were net of valuation allowances relating to net operating losses in certain countries of $274 million and $263 million, respectively.

The components of consolidated Taxes on income were as follows:


	(Stated in millions)
	Third Quarter						Nine Months
	2011			2010			2011			2010
Current:
United States — Federal	$	102		$	(60	)	$	553		$	(12	)
United States — State		16			4			28			10
Outside United States		224			150			458			456

	$	342		$	94		$	1,039		$	454

Deferred:
United States — Federal	$	86		$	96		$	(39	)	$	135
United States — State		4			3			(7	)		5
Outside United States		(20	)		16			93			16
Valuation allowance		(2	)		—			(7	)		(10	)

	$	68		$	115		$	40		$	146

Consolidated taxes on income	$	410		$	209		$	1,079		$	600

A reconciliation of the US statutory federal tax rate of 35% to the consolidated effective income tax rate follows:


	Third Quarter						Nine Months
	2011			2010			2011			2010
US federal statutory rate		35	%		35	%		35	%		35	%
US state income taxes		1			—			—			—
Non-US income taxed at different rates		(10	)		(12	)		(10	)		(14	)
Charges (See Note 2)		—			(10	)		—			(4	)
Other		(2	)		(2	)		(1	)		(1	)

Effective income tax rate		24	%		11	%		24	%		16	%

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
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+ Details

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2011
Contingencies [Abstract]
Contingencies	13. Contingencies In 2007, Schlumberger received an inquiry from the United States Department of Justice (“DOJ”) related to the DOJ’s investigation of whether certain freight forwarding and customs clearance services of Panalpina, Inc., and other companies provided to oil and oilfield service companies, including Schlumberger, violated the Foreign Corrupt Practices Act. Schlumberger is cooperating with the governmental authorities and is currently unable to predict the outcome of this matter. In 2009, Schlumberger learned that United States officials began a grand jury investigation and an associated regulatory inquiry, both related to certain Schlumberger operations in specified countries that are subject to United States trade and economic sanctions. Also in 2009, prior to being acquired by Schlumberger, Smith received an administrative subpoena with respect to its historical business practices in certain countries that are subject to United States trade and economic sanctions. Schlumberger is cooperating with the governmental authorities and is currently unable to predict the outcome of these matters. On April 20, 2010, a fire and explosion occurred onboard the semisubmersible drilling rig Deepwater Horizon, owned by Transocean Ltd. and under contract to a subsidiary of BP plc. Pursuant to a contract between M-I SWACO and BP, M-I SWACO provided certain services under the direction of BP. A number of legal actions, certain of which name an M-I SWACO entity as a defendant, have been filed in connection with the Deepwater Horizon incident, and additional legal actions may be filed in the future. Based on information currently known, the amount of any potential loss attributable to M-I SWACO with respect to potential liabilities related to the incident would not be material to Schlumberger’s consolidated financial statements. Schlumberger and its subsidiaries are party to various other legal proceedings from time to time. A liability is accrued when a loss is both probable and can be reasonably estimated. Management believes that the probability of a material loss is remote. However, litigation is inherently uncertain and it is not possible to predict the ultimate disposition of these proceedings.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Subparagraph (SX 210.5-02.25)
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-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Segment Information

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Segment Information

14. Segment Information

Schlumberger previously reported its results on the basis of five business segments — Schlumberger Oilfield Services, WesternGeco, M-I SWACO, Smith Oilfield and Distribution and by geographical areas within Schlumberger Oilfield Services. As a result of the acquisitions of Smith and Geoservices, the range of Schlumberger’s activities comprising exploration and production services is so broad that it has changed the primary way in which it allocates resources and assesses performance. Consequently, effective with the first quarter of 2011, Schlumberger changed its primary reporting to product group segments (the “Groups”).

The Groups are as follows:

	•		*Reservoir Characterization Group* — Consists of the principal technologies involved in the finding and defining of hydrocarbon deposits. These include WesternGeco, Wireline, Testing Services, Schlumberger Information Services and Data & Consulting Services.

	•		*Drilling Group* — Consists of the principal technologies involved in the drilling and positioning of oil and gas wells and is comprised of Bits & Advanced Technologies, M-I SWACO, Geoservices, Drilling and Measurements, Pathfinder, Drilling Tools and Remedial Services, Dynamic Pressure Management and Integrated Project Management well construction projects.

	•		*Reservoir Production Group* — Consists of the principal technologies involved in the lifetime production of oil and gas reservoirs and includes Well Services, Completions and Artificial Lift, together with the Subsea and Water and Carbon Services activities and the Schlumberger Production Management field production projects.

The Groups are collectively referred to as “Oilfield Services”. Additionally, Schlumberger also reports the Distribution business, acquired in the Smith transaction, as a separate segment.

All prior period segment disclosures have been recast to reflect the new segments.


	(Stated in millions)
	Third Quarter 2011						Third Quarter 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	2,488		$	610		$	2,282	$	525
Drilling		3,676			613			2,049		307
Reservoir Production		3,373			707			2,300		378
Eliminations & other		9			1			15		9

		9,546			1,931			6,646		1,219


Distribution		698			31			199		9
Eliminations		(15	)		—			—		—

		683			31			199		9


Corporate & other		—			(158	)		—		(83	)
Interest income ⁽¹⁾		—			9			—		10
Interest expense ⁽²⁾		—			(69	)		—		(51	)
Charges and credits (see Note 2)		—			(27	)		—		836

	$	10,229		$	1,717		$	6,845	$	1,940


⁽¹⁾		Excludes interest income included in the segment results ($1 million in 2011; $2 million in 2010).

⁽²⁾		Excludes interest expense included in the segment results ($1 million in 2011; $- million in 2010).


	(Stated in millions)
	Nine Months 2011						Nine Months 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	7,142		$	1,672		$	6,831	$	1,647
Drilling		10,339			1,618			5,028		867
Reservoir Production		9,150			1,848			6,271		786
Eliminations & other		27			(2	)		50		73

		26,658			5,136			18,180		3,373


Distribution		1,935			77			199		9
Eliminations		(27	)		—			—		—

		1,908			77			199		9


Corporate & other		—			(437	)		—		(251	)
Interest income ⁽¹⁾		—			28			—		34
Interest expense ⁽²⁾		—			(208	)		—		(144	)
Charges and credits (see Note 2)		—			(143	)		—		801

	$	28,566		$	4,453		$	18,379	$	3,822


⁽¹⁾		Excludes interest income included in the segment results ($1 million in 2011; $10 million in 2010).

⁽²⁾		Excludes interest expense included in the segment results ($4 million in 2011; $2 million in 2010).

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
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+ Details

Pension and Other Postretirement Benefits

9 Months Ended

Sep. 30, 2011

Pension and Other Postretirement Benefits [Abstract]

Pension and Other Postretirement Benefits

15. Pension and Other Postretirement Benefits

Net pension cost for the Schlumberger pension plans included the following components:


	(Stated in millions)
	Third Quarter												Nine Months
	2011						2010						2011						2010
	US			Int’l			US			Int’l			US			Int’l			US			Int’l
Service cost — benefits earned during period	$	14		$	15		$	15		$	15		$	44		$	49		$	43		$	39
Interest cost on projected benefit obligation		37			56			35			53			112			169			106			156
Expected return on plan assets		(42	)		(69	)		(48	)		(59	)		(127	)		(210	)		(143	)		(174	)
Amortization of prior service cost		3			30			1			28			9			91			3			85
Amortization of net loss		23			7			14			5			67			23			45			15

	$	35		$	39		$	17		$	42		$	105		$	122		$	54		$	121

During the first nine months of 2011, Schlumberger made contributions to its US and international defined benefit pension plans of $204 million.

The net periodic benefit cost for the Schlumberger US postretirement medical plan included the following components:


	(Stated in millions)
	Third Quarter						Nine Months
	2011			2010			2011			2010
Service cost — benefits earned during period	$	6		$	6		$	18		$	17
Interest cost on accumulated postretirement benefit obligation		14			14			43			43
Expected return on plan assets		(5	)		(1	)		(15	)		(4	)
Amortization of prior service cost		(3	)		(5	)		(9	)		(15	)
Amortization of net loss		4			2			10			8

	$	16		$	16		$	47		$	49

During the first nine months of 2011, Schlumberger made contributions to its US postretirement medical plan of $155 million.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB
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+ Details

Discontinued Operations	9 Months Ended
Discontinued Operations	Sep. 30, 2011
Discontinued Operations [Abstract]
Discontinued Operations	16. Discontinued Operations During the second quarter of 2011, Schlumberger completed the divestiture of its Global Connectivity Services business for approximately $385 million in cash. An after-tax gain of $220 million was recognized in connection with this transaction, and is classified in Income from Discontinued Operations in the Consolidated Statement of Income. The historical results of this business were not significant to Schlumberger’s consolidated financial statements and, as such, have not been reclassified to discontinued operations.

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1510-107760

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1020-107759

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1012-107759

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1474-107760

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6390789&loc=d3e2443-110228

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760

+ Details

Charges and Credits (Tables)

9 Months Ended

Sep. 30, 2011

Charges and Credits [Abstract]

Summary of Charges


			(Stated in millions)
							Consolidated Statement
	Pretax		Tax		Net		of Income Classification
Merger and integration-related costs	$	93	$	17	$	76	Merger & integration
Donation to the Schlumberger Foundation		50		10		40	General & administrative

	$	143	$	27	$	116

Schedule Of Merger Related Charges


				(Stated in millions)
										Consolidated Statement
	Pretax			Tax			Net			of Income Classification
Restructuring and Merger-related Charges:
Severance and other	$	90		$	13		$	77		Restructuring & other
Impairment relating to WesternGeco’s first generation Q-Land acquisition system		78			7			71		Restructuring & other
Other WesternGeco-related charges		63			—			63		Restructuring & other
Professional fees and other		56			1			55		Merger & integration
Merger-related employee benefits		41			6			35		Merger & integration
Inventory fair value adjustments		38			14			24		Cost of revenue
Mexico restructuring		40			4			36		Restructuring & other
Repurchase of bonds		28			10			18		Restructuring & other

Total restructuring and merger-related charges		434			55			379

Gain on investment in M-I SWACO		(1,270	)		(32	)		(1,238	)	Gain on Investment in M-I SWACO

	$	(836	)	$	23		$	(859	)


				(Stated in millions)
										Consolidated Statement
	Pretax			Tax			Net			of Income Classification
Restructuring and Merger-related Charges:
Severance and other	$	90		$	13		$	77		Restructuring & other
Impairment relating to WesternGeco’s first generation Q-Land acquisition system		78			7			71		Restructuring & other
Other WesternGeco-related charges		63			—			63		Restructuring & other
Professional fees and other		56			1			55		Merger & integration
Merger-related employee benefits		76			6			70		Merger & integration
Inventory fair value adjustments		38			14			24		Cost of revenue
Mexico restructuring		40			4			36		Restructuring & other
Repurchase of bonds		28			10			18		Restructuring & other

Total restructuring and merger-related charges		469			55			414

Impact of elimination of tax deduction related to Medicare Part D subsidy		—			(40	)		40		Taxes on income

Gain on investment in M-I SWACO		(1,270	)		(32	)		(1,238	)	Gain on Investment in M-I SWACO

	$	(801	)	$	(17	)	$	(784	)

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Earnings Per Share [Abstract]

Reconciliation of Earnings Per Share


							(Stated in millions, except per share amounts)
	2011						2010
	Schlumberger				Earnings per		Schlumberger				Earnings per
	Income from		Average		Share from		Income from				Share from
	Continuing		Shares		Continuing		Continuing		Average Shares		Continuing
	Operations		Outstanding		Operations		Operations		Outstanding		Operations
Third Quarter
Basic	$	1,301		1,345	$	0.97	$	1,734		1,249	$	1.39

Assumed exercise of stock options		—		9				—		7
Unvested restricted stock		—		3				—		2

Diluted	$	1,301		1,357	$	0.96	$	1,734		1,258	$	1.38


	Schlumberger				Earnings per		Schlumberger				Earnings per
	Income from		Average		Share from		Income from				Share from
	Continuing		Shares		Continuing		Continuing		Average Shares		Continuing
	Operations		Outstanding		Operations		Operations		Outstanding		Operations
Nine Months
Basic	$	3,364		1,352	$	2.49	$	3,224		1,212	$	2.66

Assumed conversion of debentures		—		—				3		5
Assumed exercise of stock options		—		10				—		8
Unvested restricted stock		—		3				—		2

Diluted	$	3,364		1,365	$	2.46	$	3,227		1,227	$	2.63

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	(Stated in millions)
	2011		2010
Third Quarter		14		14
Nine Months		6		13

Inventory (Tables)

9 Months Ended

Sep. 30, 2011

Inventory [Abstract]

Inventory Disclosure


	(Stated in millions)
	Sept. 30,		Dec. 31,
	2011		2010
Raw materials & field materials	$	1,971	$	1,833
Work in process		355		249
Finished goods		2,143		1,722

	$	4,469	$	3,804

Fixed Assets (Tables)

9 Months Ended

Sep. 30, 2011

Fixed Assets [Abstract]

Property, Plant and Equipment


	(Stated in millions)
	Sept. 30,		Dec. 31,
	2011		2010
Property, plant & equipment	$	28,960	$	27,212
Less: Accumulated depreciation		16,377		15,141

	$	12,583	$	12,071

Depreciation expense relating to fixed assets


	(Stated in millions)
	2011		2010
Third Quarter	$	689	$	603
Nine Months	$	2,019	$	1,708

Multiclient Seismic Data (Tables)

9 Months Ended

Sep. 30, 2011

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data Table


	(Stated in millions)
Balance at December 31, 2010	$	394
Capitalized in period		206
Charged to expense		(156	)

Balance at September 30, 2011	$	444

Goodwill (Tables)

9 Months Ended

Sep. 30, 2011

Goodwill [Abstract]

Schedule of Goodwill


										(Stated in millions)
	Reservoir			Reservoir
	Characterization			Production			Drilling			Distribution		Total
Balance at January 1, 2011	$	3,381		$	2,351		$	8,150		$	70	$	13,952
Adjustments relating to Smith acquisition		—			13			175			6		194
Other acquisitions		—			—			47			—		47
Divestiture of business		(51	)		—			—			—		(51	)
Impact of changes in exchange rates		(10	)		(8	)		(6	)		—		(24	)

Balance at September 30, 2011	$	3,320		$	2,356		$	8,366		$	76	$	14,118

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2011

Intangible Assets [Abstract]

Schedule of Intangible Assets by Major Class


									(Stated in millions)
	Sept. 30, 2011						Dec. 31, 2010
	Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Book Value		Amortization		Value		Book Value		Amortization		Value

Technology/Technical Know-How	$	1,835	$	303	$	1,532	$	1,846	$	215	$	1,631
Tradenames		1,671		107		1,564		1,678		61		1,617
Customer Relationships		1,954		185		1,769		1,963		129		1,834
Other		361		299		62		378		298		80

	$	5,821	$	894	$	4,927	$	5,865	$	703	$	5,162

Amortization expense charged to income


	(Stated in millions)
	2011		2010
Third Quarter	$	81	$	46
Nine Months	$	245	$	109

Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2011

Derivative Instruments and Hedging Activities [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value


	(Stated in millions)
	Fair Value of Derivatives
	Sept. 30,		Dec. 31,
	2011		2010		*Consolidated Balance Sheet* Classification
Derivative Assets
Derivatives designated as hedges:
Foreign exchange contracts	$	9	$	4	Other current assets
Foreign exchange contracts		—		37	Other Assets
Interest rate swaps		12		14	Other Assets

	$	21	$	55


Derivatives not designated as hedges:
Commodity contracts	$	—	$	3	Other current assets
Foreign exchange contracts		25		9	Other current assets
Foreign exchange contracts		23		9	Other Assets

	$	48	$	21

	$	69	$	76

Derivative Liabilities
Derivatives designated as hedges:
Foreign exchange contracts	$	19	$	9	Accounts payable and accrued liabilities
Foreign exchange contracts		134		77	Other Liabilities
Interest rate swaps		—		7	Accounts payable and accrued liabilities

	$	153	$	93


Derivatives not designated as hedges:
Foreign exchange contracts	$	20	$	14	Accounts payable and accrued liabilities
Commodity contacts		6		—	Accounts payable and accrued liabilities

	$	26	$	14

	$	179	$	107

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance


	(Stated in millions)
	Gain (Loss) Reclassified from Accumulated OCI into Income
	Third Quarter						Nine Months					*Consolidated Statement*
	2011			2010			2011		2010			of Income Classification
Foreign exchange contracts	$	(171	)	$	186		$	143	$	(149	)	Cost of revenue — Oilfield Services
Foreign exchange contracts		6			(6	)		14		(12	)	Research & engineering

	$	(165	)	$	180		$	157	$	(161	)


	(Stated in millions)
	Gain (Loss) Recognized in OCI
	Third Quarter						Nine Months
	2011			2010			2011		2010
Foreign exchange contracts	$	(258	)	$	217		$	38	$	(205	)

Schedule of Derivative Instruments, Effect on Income and Other Comprehensive Income


	(Stated in millions)
	Gain (Loss) Recognized in Income
	Third Quarter					Nine Months						*Consolidated Statement*
	2011			2010		2011			2010			of Income Classification
Derivatives designated as fair value hedges:
Foreign exchange contracts	$	1		$	5	$	8		$	(8	)	Cost of revenue — Oilfield Services
Interest rate swaps		2			10		7			19		Interest expense

	$	3		$	15	$	15		$	11


Derivatives not designated as hedges:
Foreign exchange contracts	$	(12	)	$	43	$	3		$	(2	)	Cost of revenue — Oilfield Services
Commodity contracts		(5	)		1		(7	)		(1	)	Cost of revenue — Oilfield Services

	$	(17	)	$	44	$	(4	)	$	(3	)

- Definition

Tabular disclosure of the location and amount of gains and losses reported in the statement of financial performance, or when applicable, the statement of financial position. For example, (a) gains and losses recognized in the income statement on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges and (b) gains and losses initially recognized in other comprehensive income on derivative instruments designated and qualifying as cash flow hedges.

+ References + Details

Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2011

Long-term Debt [Abstract]

Long-term Debt


	(Stated in millions)
	Sept. 30,		Dec. 31,
	2011		2010
3.30% Senior Notes due 2021	$	1,595	$	—
4.50% Guaranteed Notes due 2014		1,364		1,319
2.75% Guaranteed Notes due 2015		1,357		1,310
1.95% Senior Notes due 2016		1,099		—
4.20% Guaranteed Notes due 2021		1,099		—
5.25% Guaranteed Notes due 2013		682		659
2.65% Guaranteed Notes due 2016		498		—
3.00% Guaranteed Notes due 2013		450		450
Floating Rate Senior Notes due 2014		299		—
9.75% Senior Notes due 2019		—		776
8.625% Senior Notes due 2014		—		272
6.00% Senior Notes due 2016		—		218
Commercial paper borrowings		—		367
Other variable rate debt		287		133

		8,730		5,504
Fair value adjustment — hedging		10		13

	$	8,740	$	5,517

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

Income Tax (Tables)

9 Months Ended

Sep. 30, 2011

Income Tax [Abstract]

Income Tax Disclosure Table


	(Stated in millions)
	Third Quarter				Nine Months
	2011		2010		2011		2010
United States	$	651	$	168	$	1,575	$	312
Outside United States		1,066		1,772		2,878		3,510

	$	1,717	$	1,940	$	4,453	$	3,822

Components of Net Deferred Tax Assets


	(Stated in millions)
	Sept. 30,			Dec. 31,
	2011			2010
Postretirement benefits, net	$	273		$	327
Intangible assets		(1,523	)		(1,674	)
Investments in non-US subsidiaries		(325	)		(353	)
Other, net		61			115

	$	(1,514	)	$	(1,585	)

Components of Consolidated Income Taxes


	(Stated in millions)
	Third Quarter						Nine Months
	2011			2010			2011			2010
Current:
United States — Federal	$	102		$	(60	)	$	553		$	(12	)
United States — State		16			4			28			10
Outside United States		224			150			458			456

	$	342		$	94		$	1,039		$	454

Deferred:
United States — Federal	$	86		$	96		$	(39	)	$	135
United States — State		4			3			(7	)		5
Outside United States		(20	)		16			93			16
Valuation allowance		(2	)		—			(7	)		(10	)

	$	68		$	115		$	40		$	146

Consolidated taxes on income	$	410		$	209		$	1,079		$	600

Reconciliation of the US Statutory Federal Tax Rate


	Third Quarter						Nine Months
	2011			2010			2011			2010
US federal statutory rate		35	%		35	%		35	%		35	%
US state income taxes		1			—			—			—
Non-US income taxed at different rates		(10	)		(12	)		(10	)		(14	)
Charges (See Note 2)		—			(10	)		—			(4	)
Other		(2	)		(2	)		(1	)		(1	)

Effective income tax rate		24	%		11	%		24	%		16	%

Segment Information (Tables)

9 Months Ended

Sep. 30, 2011

Segment Information [Abstract]

Schedule of Segment Reporting Information, by Segment


	(Stated in millions)
	Third Quarter 2011						Third Quarter 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	2,488		$	610		$	2,282	$	525
Drilling		3,676			613			2,049		307
Reservoir Production		3,373			707			2,300		378
Eliminations & other		9			1			15		9

		9,546			1,931			6,646		1,219


Distribution		698			31			199		9
Eliminations		(15	)		—			—		—

		683			31			199		9


Corporate & other		—			(158	)		—		(83	)
Interest income ⁽¹⁾		—			9			—		10
Interest expense ⁽²⁾		—			(69	)		—		(51	)
Charges and credits (see Note 2)		—			(27	)		—		836

	$	10,229		$	1,717		$	6,845	$	1,940


⁽¹⁾		Excludes interest income included in the segment results ($1 million in 2011; $2 million in 2010).

⁽²⁾		Excludes interest expense included in the segment results ($1 million in 2011; $- million in 2010).


	(Stated in millions)
	Nine Months 2011						Nine Months 2010
				Income					Income
				before					before
	Revenue			taxes			Revenue		taxes
Oilfield Services
Reservoir Characterization	$	7,142		$	1,672		$	6,831	$	1,647
Drilling		10,339			1,618			5,028		867
Reservoir Production		9,150			1,848			6,271		786
Eliminations & other		27			(2	)		50		73

		26,658			5,136			18,180		3,373


Distribution		1,935			77			199		9
Eliminations		(27	)		—			—		—

		1,908			77			199		9


Corporate & other		—			(437	)		—		(251	)
Interest income ⁽¹⁾		—			28			—		34
Interest expense ⁽²⁾		—			(208	)		—		(144	)
Charges and credits (see Note 2)		—			(143	)		—		801

	$	28,566		$	4,453		$	18,379	$	3,822


⁽¹⁾		Excludes interest income included in the segment results ($1 million in 2011; $10 million in 2010).

⁽²⁾		Excludes interest expense included in the segment results ($4 million in 2011; $2 million in 2010).

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References + Details

Pension and Other Postretirement Benefits (Table)

9 Months Ended

Sep. 30, 2011

Defined Benefit Plan Disclosure [Line Items]

Net Pension Cost for the Schlumberger Pension Plans and US Postretirement Medical Plan


	(Stated in millions)
	Third Quarter												Nine Months
	2011						2010						2011						2010
	US			Int’l			US			Int’l			US			Int’l			US			Int’l
Service cost — benefits earned during period	$	14		$	15		$	15		$	15		$	44		$	49		$	43		$	39
Interest cost on projected benefit obligation		37			56			35			53			112			169			106			156
Expected return on plan assets		(42	)		(69	)		(48	)		(59	)		(127	)		(210	)		(143	)		(174	)
Amortization of prior service cost		3			30			1			28			9			91			3			85
Amortization of net loss		23			7			14			5			67			23			45			15

	$	35		$	39		$	17		$	42		$	105		$	122		$	54		$	121


	(Stated in millions)
	Third Quarter						Nine Months
	2011			2010			2011			2010
Service cost — benefits earned during period	$	6		$	6		$	18		$	17
Interest cost on accumulated postretirement benefit obligation		14			14			43			43
Expected return on plan assets		(5	)		(1	)		(15	)		(4	)
Amortization of prior service cost		(3	)		(5	)		(9	)		(15	)
Amortization of net loss		4			2			10			8

	$	16		$	16		$	47		$	49

Charges and Credits (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
Charges and Credits (Details) - USD ($) $ in Millions	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Mar. 31, 2010	Sep. 30, 2011	Sep. 30, 2010
Restructuring Charges [Abstract]
Charges Pretax					$ 143
Charges, tax					27
Charges					116
Medicare Part D Subsidy [Member]
Restructuring Charges [Abstract]
Charges, tax						$ (40)
Charges				$ 40		40
Merger and integration-related transaction costs
Restructuring Charges [Abstract]
Charges Pretax	$ 27	$ 32	$ 34	$ 35	93	56
Charges, tax					17
Charges	$ 23	$ 24	$ 28		76	$ 55
Donation to Schlumberger Foundation [Member]
Restructuring Charges [Abstract]
Charges Pretax					50
Charges, tax					10
Charges					$ 40

Charges and Credits (Details 1) - USD ($) $ in Millions	3 Months Ended					9 Months Ended
Charges and Credits (Details 1) - USD ($) $ in Millions	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Sep. 30, 2010	Mar. 31, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Restructuring Charges [Abstract]
Charges Pretax						$ 143
Charges, tax						27
Charges						116
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax						143
Charges						116
Equity Method Investment, Other than Temporary Impairment							$ 30
Noncontrolling interests	$ 123					123		$ 218
M-I SWACO [Member]
Restructuring Charges [Abstract]
Charges Pretax							1,270
Charges, tax							1,240
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax							$ 1,270
Percentage of equity interest in joint venture				40.00%			40.00%
Notes 6.50 % Due 2012 [Member]
Restructuring Charges [Abstract]
Charges Pretax							$ 28
Charges							18
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax							28
Charges							18
Repurchase Senior Notes							352
Guaranteed notes face amount				$ 650			$ 650
Debt instrument interest rate				6.50%			6.50%
Gain on Purchase of Business [Member]
Restructuring Charges [Abstract]
Charges Pretax				$ (1,270)			$ (1,270)
Charges, tax				(32)			(32)
Charges				(1,238)			(1,238)
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				(1,270)			(1,270)
Charges				(1,238)			(1,238)
Merger Related Employee Benefits [Member]
Restructuring Charges [Abstract]
Charges Pretax				41			76
Charges, tax				6			6
Charges				35			70
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				41			76
Charges				35			70
Inventory Fair Value Adjustments [Member]
Restructuring Charges [Abstract]
Charges Pretax				38			38
Charges, tax				14			14
Charges				24			24
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				38			38
Charges				24			24
Professional Fees [Member]
Restructuring Charges [Abstract]
Charges Pretax				56			56
Charges, tax				1			1
Charges				55			55
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				56			56
Charges				55			55
Restructuring Charges [Member]
Restructuring Charges [Abstract]
Charges Pretax				434			469
Charges, tax				55			55
Charges				379			414
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				434			469
Charges				379			414
Other Charges on Restructuring [Member]
Restructuring Charges [Abstract]
Charges Pretax				63			63
Charges				63			63
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				63			63
Charges				63			63
Mexico Restructuring Charges [Member]
Restructuring Charges [Abstract]
Charges Pretax				40			40
Charges, tax				4			4
Charges				36			36
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				40			40
Charges				36			36
Repurchase of Bonds [Member]
Restructuring Charges [Abstract]
Charges Pretax				28			28
Charges, tax				10			10
Charges				18			18
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				28			28
Charges				18			18
Impairment in Value of Asset [Member]
Restructuring Charges [Abstract]
Charges Pretax				78			78
Charges, tax				7			7
Charges				71			71
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				78			78
Charges				71			71
Acquisition [Member]
Restructuring Charges [Abstract]
Charges Pretax				(836)			(801)
Charges, tax				23			(17)
Charges				(859)			(784)
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				(836)			(801)
Charges				(859)			(784)
Employee Severance [Member]
Restructuring Charges [Abstract]
Charges Pretax				90			90
Charges, tax				13			13
Charges				77			77
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax				90			90
Charges				$ 77			77
WesternGeco First Generation Land Operation [Member]
Summary Of Charges And Credit (Textual) [Abstract]
Impairment charges							71
Asset Impairment Charges							78
Medicare Part D Subsidy [Member]
Restructuring Charges [Abstract]
Charges, tax							(40)
Charges					$ 40		40
Summary Of Charges And Credit (Textual) [Abstract]
Charges					40		40
Merger and integration-related transaction costs
Restructuring Charges [Abstract]
Charges Pretax	27	$ 32	$ 34		35	93	56
Charges, tax						17
Charges	23	24	28			76	55
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax	27	32	34		$ 35	93	56
Charges	$ 23	24	$ 28			$ 76	55
General and Administrative [Member]
Restructuring Charges [Abstract]
Charges Pretax		50
Charges		40
Summary Of Charges And Credit (Textual) [Abstract]
Charges Pretax		50
Charges		$ 40
Westerngeco Electromagnetic Service [Member]
Restructuring Charges [Abstract]
Charges							63
Summary Of Charges And Credit (Textual) [Abstract]
Charges							$ 63

Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Schlumberger amounts attributable to:
Basic	$ 1,301	$ 1,734	$ 3,364	$ 3,224
Assumed conversion of debentures				3
Diluted	$ 1,301	$ 1,734	$ 3,364	$ 3,227
Average shares outstanding:
Basic	1,345	1,249	1,352	1,212
Assumed conversion of debentures				5
Assumed exercise of stock options	9	7	10	8
Unvested restricted stock	3	2	3	2
Assuming dilution	1,357	1,258	1,365	1,227
Earnings per Share
Basic	$ 0.97	$ 1.39	$ 2.49	$ 2.66
Diluted	$ 0.96	$ 1.38	$ 2.46	$ 2.63

Earnings Per Share (Details 1) - shares shares in Millions	3 Months Ended		9 Months Ended
Earnings Per Share (Details 1) - shares shares in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Outstanding Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Employee stock options to purchase	14	14	6	13

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 13, 14
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Diluted Earnings Per Share
-URI http://asc.fasb.org/extlink&oid=6510752

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Contingent Stock Agreement
-URI http://asc.fasb.org/extlink&oid=6508534

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Acquisitions (Details) - USD ($) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2010	Aug. 27, 2010	Apr. 23, 2010
Geoservices [Member]
Business Acquisition [Line Items]
Purchase price			$ 915
Smith International Incorporate [Member]
Business Acquisition [Line Items]
Equivalent new Schlumberger shares of common stock issued		176
Common stock equity consideration		$ 9,800
Revenue reported by Smith	$ 6,800

Acquisitions (Details 1) $ in Millions	9 Months Ended
Acquisitions (Details 1) $ in Millions	Sep. 30, 2011 USD ($)
Acquisitions (Textual) [Abstract]
Acquisitions and minority interest investments, net of cash acquired	$ 148

Inventory (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Inventory
Raw materials & field materials	$ 1,971	$ 1,833
Work in process	355	249
Finished goods	2,143	1,722
Inventories	$ 4,469	$ 3,804

Fixed Assets (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Property, Plant and Equipment
Property, plant & equipment	$ 28,960	$ 27,212
Less: Accumulated depreciation	16,377	15,141
Fixed assets less accumulated depreciation	$ 12,583	$ 12,071

- Definition

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References + Details

Fixed Assets (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Fixed Assets (Details 1) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Fixed Assets (Textual) [Abstract]
Depreciation expense relating to fixed assets	$ 689	$ 603	$ 2,019	$ 1,708

Multiclient Seismic Data (Details) $ in Millions	9 Months Ended
Multiclient Seismic Data (Details) $ in Millions	Sep. 30, 2011 USD ($)
Multiclient Seismic Data
Balance at December 31, 2010	$ 394
Capitalized in period	206
Charged to expense	(156)
Balance at September 30, 2011	$ 444

Goodwill (Details) $ in Millions	9 Months Ended
Goodwill (Details) $ in Millions	Sep. 30, 2011 USD ($)
Schedule of Goodwill
Balance at January 1, 2011	$ 13,952
Adjustments relating to Smith acquisition	194
Other acquisitions	47
Divestiture of business	(51)
Impact of changes in exchange rates	(24)
Balance at September 30, 2011	14,118
Reservoir Characterization [Member]
Schedule of Goodwill
Balance at January 1, 2011	3,381
Adjustments relating to Smith acquisition	0
Other acquisitions	0
Divestiture of business	(51)
Impact of changes in exchange rates	(10)
Balance at September 30, 2011	3,320
Reservoir Production [Member]
Schedule of Goodwill
Balance at January 1, 2011	2,351
Adjustments relating to Smith acquisition	13
Other acquisitions	0
Divestiture of business	0
Impact of changes in exchange rates	(8)
Balance at September 30, 2011	2,356
Drilling [Member]
Schedule of Goodwill
Balance at January 1, 2011	8,150
Adjustments relating to Smith acquisition	175
Other acquisitions	47
Divestiture of business	0
Impact of changes in exchange rates	(6)
Balance at September 30, 2011	8,366
Distribution [Member]
Schedule of Goodwill
Balance at January 1, 2011	70
Adjustments relating to Smith acquisition	6
Other acquisitions	0
Divestiture of business	0
Impact of changes in exchange rates	0
Balance at September 30, 2011	$ 76

Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Gross book value and accumulated amortization of intangible assets
Gross Book Value	$ 5,821	$ 5,865
Accumulated Amortization	894	703
Net Book Value	4,927	5,162
Technology/Technical Know-How [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	1,835	1,846
Accumulated Amortization	303	215
Net Book Value	1,532	1,631
Tradenames [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	1,671	1,678
Accumulated Amortization	107	61
Net Book Value	1,564	1,617
Customer Relationships [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	1,954	1,963
Accumulated Amortization	185	129
Net Book Value	1,769	1,834
Other [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	361	378
Accumulated Amortization	299	298
Net Book Value	$ 62	$ 80

Intangible Assets (Details 1) $ in Millions	3 Months Ended		9 Months Ended
Intangible Assets (Details 1) $ in Millions	Sep. 30, 2011 USD ($)	Sep. 30, 2010 USD ($)	Sep. 30, 2011 USD ($) Year	Sep. 30, 2010 USD ($)
Intangible Assets - Additional Information
Amortization expense on intangible assets excluding goodwill	$ 81	$ 46	$ 245	$ 109
Weighted average amortization period for all intangible assets (years) \| Year			21
Future Amortization expense charged to income, remainder of 2011			$ 81
Estimated amortization charged to income, 2012			303
Estimated amortization charged to income, 2013			295
Estimated amortization charged to income, 2014			286
Estimated amortization charged to income, 2015			265
Estimated amortization charged to income, 2016			$ 255

Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Derivative assets
Derivative assets	$ 69	$ 76
Derivative Liabilities
Derivative Liabilities	179	107
Designated as Hedging Instrument [Member]
Derivative assets
Derivative assets	21	55
Derivative Liabilities
Derivative Liabilities	153	93
Nondesignated [Member]
Derivative assets
Derivative assets	48	21
Derivative Liabilities
Derivative Liabilities	26	14
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member] \| Other Current Assets [Member]
Derivative assets
Derivative assets	9	4
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member] \| Other Assets [Member]
Derivative assets
Derivative assets	0	37
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	19	9
Foreign Exchange Contract [Member] \| Designated as Hedging Instrument [Member] \| Other Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	134	77
Foreign Exchange Contract [Member] \| Nondesignated [Member] \| Other Current Assets [Member]
Derivative assets
Derivative assets	25	9
Foreign Exchange Contract [Member] \| Nondesignated [Member] \| Other Assets [Member]
Derivative assets
Derivative assets	23	9
Foreign Exchange Contract [Member] \| Nondesignated [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	20	14
Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member] \| Other Assets [Member]
Derivative assets
Derivative assets	12	14
Interest Rate Contract [Member] \| Designated as Hedging Instrument [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	0	7
Commodity Contract [Member] \| Nondesignated [Member] \| Other Current Assets [Member]
Derivative assets
Derivative assets	0	3
Commodity Contract [Member] \| Nondesignated [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	$ 6	$ 0

Derivative Instruments and Hedging Activities (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Commodity Contract [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Commodity forward contract outstanding	$ 38		$ 38
Fair Value Hedging [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Gain/(loss) recognized in income	3	$ 15	15	$ 11
Fair Value Hedging [Member] \| Foreign Exchange Contract [Member] \| Cost of revenue - Oilfield Services [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Gain/(loss) recognized in income	1	5	8	(8)
Fair Value Hedging [Member] \| Interest Rate Contract [Member] \| Interest Expense [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Gain/(loss) recognized in income	2	10	7	19
Nondesignated [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Gain/(loss) recognized in income	(17)	44	(4)	(3)
Nondesignated [Member] \| Foreign Exchange Contract [Member] \| Cost of revenue - Oilfield Services [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Gain/(loss) recognized in income	(12)	43	3	(2)
Nondesignated [Member] \| Commodity Contract [Member] \| Cost of revenue - Oilfield Services [Member]
Effect of derivative instruments designated as fair value hedges and not designated as hedges on the consolidated statement of income
Gain/(loss) recognized in income	$ (5)	$ 1	$ (7)	$ (1)

Derivative Instruments and Hedging Activities (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Gain (loss) reclassified from accumulated OCI into income	$ (165)	$ 180	$ 157	$ (161)
Foreign Exchange Contract [Member] \| Cost of revenue - Oilfield Services [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Gain (loss) reclassified from accumulated OCI into income	(171)	186	143	(149)
Foreign Exchange Contract [Member] \| Research and Development Expense [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net [Abstract]
Gain (loss) reclassified from accumulated OCI into income	$ 6	$ (6)	$ 14	$ (12)

Derivative Instruments and Hedging Activities (Details 3) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Foreign Exchange Contract [Member]
Effect of derivative instruments in cash flow hedging relationships on income and other comprehensive income (OCI)
Gain (loss) recognized in OCI	$ (258)	$ 217	$ 38	$ (205)

Derivative Instruments and Hedging Activities (Details 4) $ in Millions	9 Months Ended
	Sep. 30, 2011 USD ($) Country	Sep. 30, 2009 USD ($)
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Number of countries in which Schlumberger conducts business \| Country	80
Recognized a cumulative net gain in Equity relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges	$ 74
Contracts outstanding in various foreign currencies (US dollar equivalent)	7,400
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps	8,000
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps	3,400
Short-term investments and Fixed income investments, held to maturity	$ 4,600
3.00% Guaranteed Notes due 2013 [Member]
Derivative [Line Items]
Notional amount of interest rate swap		$ 450
Notes relating to interest rate swap		$ 450
3.00% Guaranteed Notes due 2013 [Member] \| Fixed Rate Debt [Member]
Derivative [Line Items]
Derivative swap interest rate		3.00%
3.00% Guaranteed Notes due 2013 [Member] \| Floating Rate Debt [Member]
Derivative [Line Items]
Derivative swap interest rate		0.765%

Long-term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Summary of Long-Term Debt
Long-term debt, carrying amount	$ 8,730	$ 5,504
Fair value adjustment-hedging	10	13
Other Long-term Debt, Noncurrent, Total	8,740	5,517
Commercial Paper [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	0	367
Debt, Other [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	287	133
3.30% Senior Notes due 2021 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	1,595	0
4.50% Guaranteed Notes due 2014 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	1,364	1,319
2.75% Guaranteed Notes due 2015 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	1,357	1,310
1.95% Senior Notes due 2016 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	1,099	0
4.20% Guaranteed Notes due 2021 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	1,099	0
5.25% Guaranteed Notes due 2013 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	682	659
2.65% Guaranteed Notes due 2016 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	498	0
3.00% Guaranteed Notes due 2013 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	450	450
Floating Rate Senior Notes due 2014 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	299	0
9.75% Senior Notes due 2019 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	0	776
8.625% Senior Notes due 2014 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	0	272
6.00% Senior Notes due 2016 [Member]
Summary of Long-Term Debt
Long-term debt, carrying amount	$ 0	$ 218

Long-term Debt (Details 1) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Long-term Debt (Details 1) - USD ($) $ in Millions	Mar. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2009
Long-term Debt Additional (Textual) [Abstract]
Committed facilities which support commercial paper programs		$ 5,600
Commercial paper borrowings		2,395	$ 2,214
Long-term Debt (Textual) [Abstract]
Repurchase of senior notes	$ 1,260
Long-term debt, fair value		9,000	5,600
Committed debt facility agreement aggregated		5,600
Unused debt facility		3,400
Commercial Paper [Member]
Long-term Debt Additional (Textual) [Abstract]
Committed facilities which support commercial paper programs		5,000
Commercial paper borrowings		2,000	$ 1,900
Long-term Debt (Textual) [Abstract]
Committed debt facility agreement aggregated		5,000
Commercial paper programs maturing December 2011 [Member]
Long-term Debt Additional (Textual) [Abstract]
Committed facilities which support commercial paper programs		2,000
Long-term Debt (Textual) [Abstract]
Committed debt facility agreement aggregated		2,000
Commercial paper programs maturing July 2016 [Member]
Long-term Debt Additional (Textual) [Abstract]
Committed facilities which support commercial paper programs		3,000
Long-term Debt (Textual) [Abstract]
Committed debt facility agreement aggregated		$ 3,000
4.50% Guaranteed Notes due 2014 [Member]
Long-term Debt Additional (Textual) [Abstract]
Debt instrument interest rate		4.50%
2.75% Guaranteed Notes due 2015 [Member]
Long-term Debt Additional (Textual) [Abstract]
Debt instrument interest rate		2.75%
4.20% Guaranteed Notes due 2021 [Member]
Long-term Debt Additional (Textual) [Abstract]
Guaranteed notes face amount	1,100
Debt instrument interest rate		4.20%
5.25% Guaranteed Notes due 2013 [Member]
Long-term Debt Additional (Textual) [Abstract]
Debt instrument interest rate		5.25%
2.65% Guaranteed Notes due 2016 [Member]
Long-term Debt Additional (Textual) [Abstract]
Guaranteed notes face amount	$ 500
Debt instrument interest rate		2.65%
Effective interest rate on euro denominated debt	2.39%
3.00% Guaranteed Notes due 2013 [Member]
Long-term Debt Additional (Textual) [Abstract]
Guaranteed notes face amount				$ 450
Debt instrument interest rate		3.00%
9.75% Senior Notes due 2019 [Member]
Long-term Debt Additional (Textual) [Abstract]
Debt instrument interest rate		9.75%
8.625% Senior Notes due 2014 [Member]
Long-term Debt Additional (Textual) [Abstract]
Debt instrument interest rate		8.625%
6.00% Senior Notes due 2016 [Member]
Long-term Debt Additional (Textual) [Abstract]
Debt instrument interest rate		6.00%
1.95% Senior Notes due 2016 [Member]
Long-term Debt Additional (Textual) [Abstract]
face amount of debt instrument		$ 1,100
3.30% Senior Notes due 2021 [Member]
Long-term Debt Additional (Textual) [Abstract]
face amount of debt instrument		1,600
Floating Rate Senior Notes due 2014 [Member]
Long-term Debt Additional (Textual) [Abstract]
face amount of debt instrument		$ 300
Basis Point over LIBOR		0.50%

Income Tax (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Tax (Details) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income from before taxes subject to US and Non-US Income Taxes
United States	$ 651	$ 168	$ 1,575	$ 312
Outside United States	1,066	1,772	2,878	3,510
Income (Loss) from Continuing Operations before Income Taxes and Minority Interest, Total	$ 1,717	$ 1,940	$ 4,453	$ 3,822

Income Tax (Details 1) - USD ($) $ in Millions	Sep. 30, 2011	Dec. 31, 2010
Components of Net Deferred Tax Assets
Postretirement benefits, net	$ 273	$ 327
Intangible assets	(1,523)	(1,674)
Investments in non-US Subsidiaries	(325)	(353)
Other, net	61	115
Deferred Tax Assets, Net, Total	$ (1,514)	$ (1,585)

- Definition

The tax effect as of the balance sheet date of the amount of estimated future tax deductions arising from postretirement benefits, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

+ References + Details

Income Tax (Details 2) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Tax (Details 2) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Current Income Tax Expense Benefit Continuing Operations [Abstract]
United States - Federal	$ 102	$ (60)	$ 553	$ (12)
United States - State	16	4	28	10
Outside United States	224	150	458	456
Current Income Tax Expense (Benefit), Total	342	94	1,039	454
Deferred Income Tax Expense Benefit Continuing Operations [Abstract]
United States - Federal	86	96	(39)	135
United States - State	4	3	(7)	5
Outside United States	(20)	16	93	16
Valuation allowance	(2)		(7)	(10)
Deferred income taxes	68	115	40	146
Consolidated taxes on income	$ 410	$ 209	$ 1,079	$ 600

Income Tax (Details 3)	3 Months Ended		9 Months Ended
Income Tax (Details 3)	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Reconciliation of the US statutory federal tax rate to the consolidated effective income tax rate
US federal statutory rate	35.00%	35.00%	35.00%	35.00%
US state income taxes	100.00%
Non-US income taxed at different rates	(10.00%)	(12.00%)	(10.00%)	(14.00%)
Charges (See Note 2)		(10.00%)		4.00%
Other	(2.00%)	(2.00%)	100.00%	(1.00%)
Effective income tax rate	24.00%	11.00%	24.00%	16.00%

Income Tax (Details 4) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Tax (Details 4) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Income Tax (Textual) [Abstract]
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	$ 274		$ 274		$ 263
US federal statutory rate	35.00%	35.00%	35.00%	35.00%
Charges Pretax			$ 143
Charges, net pretax	$ 27	$ (836)	143	$ (801)
Domestic Country [Member]
Income Tax (Textual) [Abstract]
Charges Pretax	23	63	91	63
Foreign Country [Member]
Income Tax (Textual) [Abstract]
Charges Pretax	$ 4	$ (899)	$ 52	$ (864)

Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Segment Information (Details) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting Information [Line Items]
Revenue	$ 10,229	$ 6,845	$ 28,566	$ 18,379
Income before taxes	1,717	1,940	4,453	3,822
Oilfield Services [Member]
Segment Reporting Information [Line Items]
Revenue	9,546	6,646	26,658	18,180
Income before taxes	1,931	1,219	5,136	3,373
Reservoir Characterization [Member]
Segment Reporting Information [Line Items]
Revenue	2,488	2,282	7,142	6,831
Income before taxes	610	525	1,672	1,647
Drilling [Member]
Segment Reporting Information [Line Items]
Revenue	3,676	2,049	10,339	5,028
Income before taxes	613	307	1,618	867
Reservoir Production [Member]
Segment Reporting Information [Line Items]
Revenue	3,373	2,300	9,150	6,271
Income before taxes	707	378	1,848	786
Eliminations and other [Member]
Segment Reporting Information [Line Items]
Revenue	9	15	27	50
Income before taxes	1	9	(2)	73
Distribution [Member]
Segment Reporting Information [Line Items]
Revenue	698	199	1,935	199
Income before taxes	31	9	77	9
Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue	(15)		(27)
Segment Results [Member]
Segment Reporting Information [Line Items]
Revenue	683	199	1,908	199
Income before taxes	31	9	77	9
Corporate and other [Member]
Segment Reporting Information [Line Items]
Income before taxes	(158)	(83)	(437)	(251)
Interest income [Member]
Segment Reporting Information [Line Items]
Income before taxes	9	10	28	34
Interest expense [Member]
Segment Reporting Information [Line Items]
Income before taxes	(69)	(51)	(208)	(144)
Charges and Credits [Member]
Segment Reporting Information [Line Items]
Income before taxes	$ (27)	$ 836	$ (143)	$ 801

Segment Information (Details 1) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Segment Information (Details 1) - USD ($) $ in Millions	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Information (Textual)
Interest income included in the segment results	$ 1	$ 2	$ 1	$ 10
Interest expense included in the segment results	$ 70	$ 47	$ 212	$ 146

Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
United States Pension Plans of US Entity Defined Benefit [Member]
Disclosure Net Pension Cost For Parent Company Pension Plans [Abstract]
Service cost-benefits earned during period	$ 14	$ 15	$ 44	$ 43
Interest cost on projected benefit obligation	37	35	112	106
Expected return on plan assets	(42)	(48)	(127)	(143)
Amortization of prior service cost	3	1	9	3
Amortization of net loss	23	14	67	45
Total Benefit cost	35	17	105	54
Foreign Pension Plans, Defined Benefit [Member]
Disclosure Net Pension Cost For Parent Company Pension Plans [Abstract]
Service cost-benefits earned during period	15	15	49	39
Interest cost on projected benefit obligation	56	53	169	156
Expected return on plan assets	(69)	(59)	(210)	(174)
Amortization of prior service cost	30	28	91	85
Amortization of net loss	7	5	23	15
Total Benefit cost	$ 39	$ 42	$ 122	$ 121

- Definition

An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

+ References

+ Details

- Definition

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 106
-Paragraph 518
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 87
-Paragraph 264
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a, h
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Service Cost (Component of Net Periodic Pension Cost)
-URI http://asc.fasb.org/extlink&oid=6525008

+ Details

Pension and Other Postretirement Benefits (Details 1) - Postretirement Medical Plan [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Disclosure Net Periodic Benefit Cost For The Parent Company Us Postretirement Medical Plan [Abstract]
Service cost-benefits earned during period	$ 6	$ 6	$ 18	$ 17
Interest cost on accumulated postretirement benefit obligation	14	14	43	43
Expected return on plan assets	(5)	(1)	(15)	(4)
Amortization of prior service cost	(3)	(5)	(9)	(15)
Amortization of net loss	4	2	10	8
Total Benefit cost	$ 16	$ 16	$ 47	$ 49

The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

+ References + Details

- Definition

+ References

+ Details

Pension and Other Postretirement Benefits (Details 2) $ in Millions	9 Months Ended
	Sep. 30, 2011 USD ($)
Postretirement Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans	$ 155
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to defined benefit pension plans	$ 204

Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Discontinued Operations (Details) - USD ($) $ in Millions	Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2011
Discontinued Operations (Textual) [Abstract]
Global Connectivity Services business Discontinued Operations		$ 385	$ 385
Income from Discontinued Operations	$ 0	$ 220	$ 220

- Definition

This element represents the overall income (loss) from a disposal group apportioned to the parent that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References + Details