View Filing Data

Print Document View Excel Document

Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2012 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	Mar. 31, 2012
Amendment Flag	false
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,333,554,386

CONSOLIDATED STATEMENT OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenue
Revenue	$ 10,611	$ 8,716
Interest and other income	47	31
Cost of Revenue
Research & engineering	275	254
General & administrative	93	93
Merger & integration	15	34
Interest	80	73
Income before taxes	1,721	1,238
Taxes on income	411	295
Net income	1,310	943
Net income (loss) attributable to noncontrolling interests	9	(1)
Net income attributable to Schlumberger	$ 1,301	$ 944
Basic earnings per share of Schlumberger	$ 0.98	$ 0.69
Diluted earnings per share of Schlumberger	$ 0.97	$ 0.69
Average shares outstanding:
Basic	1,334	1,360
Assuming dilution	1,344	1,375
Oilfield Services [Member]
Revenue
Revenue	$ 9,918	$ 8,122
Cost of Revenue
Cost of revenue	7,816	6,483
Distribution [Member]
Revenue
Revenue	693	594
Cost of Revenue
Cost of revenue	$ 658	$ 572

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 1,310	$ 943
Currency translation adjustments
Unrealized net change arising during the period	111	129
Derivatives
Net derivatives gain (loss) on hedge transactions	155	192
Reclassification to net income of net realized (gain) loss	(110)	227
Actuarial loss
Actuarial loss arising during the period	(28)	(11)
Amortization to net income of net actuarial loss	43	33
Prior service cost
Prior service credit arising during the period		1
Amortization to net income of net prior service cost	31	30
Income taxes on pension and other postretirement benefit plans	(10)	(22)
Comprehensive income	1,502	1,068
Comprehensive income (loss) attributable to noncontrolling interests	9	(1)
Comprehensive income attributable to Schlumberger	$ 1,493	$ 1,069

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Current Assets
Cash	$ 1,346	$ 1,705
Short-term investments	2,739	3,122
Receivables less allowance for doubtful accounts (2012 - $171; 2011 - $177)	10,401	9,500
Inventories	5,118	4,700
Deferred taxes	487	456
Other current assets	1,201	1,056
Current assets total	21,292	20,539
Fixed Income Investments, held to maturity	281	256
Investments in Affiliated Companies	1,303	1,266
Fixed Assets less accumulated depreciation	13,314	12,993
Multiclient Seismic Data	454	425
Goodwill	14,199	14,154
Intangible Assets	4,805	4,882
Other Assets	718	686
Total Assets	56,366	55,201
Current Liabilities
Accounts payable and accrued liabilities	7,294	7,579
Liability for taxes on income	1,411	1,245
Long-term debt - current portion	1,296	1,041
Short-term borrowings	432	336
Dividends payable	369	337
Current Liabilities Total	10,802	10,538
Long-term Debt	8,439	8,556
Postretirement Benefits	1,717	1,732
Deferred Taxes	1,749	1,731
Other Liabilities	1,171	1,252
Total Liabilities	23,878	23,809
Equity
Common stock	11,685	11,639
Treasury stock	(5,767)	(5,679)
Retained earnings	29,794	28,860
Accumulated other comprehensive loss	(3,365)	(3,557)
Schlumberger stockholders' equity	32,347	31,263
Noncontrolling interests	141	129
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Total	32,488	31,392
Liabilities and stockholders' equity, Total	$ 56,366	$ 55,201

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheet [Abstract]
Allowance for doubtful accounts on receivable	$ 171	$ 177

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

3 Months Ended

Mar. 31, 2012

Mar. 31, 2011

Cash flows from operating activities:

Net income

$ 1,310

$ 943

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

Depreciation and amortization (1)

^[1]

853

788

Earnings of companies carried at equity, less dividends received

(37)

(21)

Deferred income taxes

(18)

Stock-based compensation expense

Pension and other postretirement benefits expense

Pension and other postretirement benefits funding

(54)

(49)

Change in assets and liabilities: (2)

Increase in receivables

^[2]

(875)

(561)

Increase in inventories

^[2]

(399)

(251)

Increase in other current assets

^[2]

(130)

(49)

Decrease in accounts payable and accrued liabilities

^[2]

(267)

(177)

Increase (decrease) in liability for taxes on income

^[2]

164

(99)

Decrease in other liabilities

^[2]

(16)

(41)

Other-net

^[2]

132

NET CASH PROVIDED BY OPERATING ACTIVITIES

732

836

Cash flows from investing activities:

Capital expenditures

(961)

(770)

Multiclient seismic data capitalized

(101)

(83)

Business acquisitions, net of cash acquired

(74)

Sale of investments, net

362

565

Other

(45)

(23)

NET CASH USED IN INVESTING ACTIVITIES

(745)

(385)

Cash flows from financing activities:

Dividends paid

(334)

(291)

Proceeds from employee stock purchase plan

115

Proceeds from exercise of stock options

146

Stock repurchase program

(324)

(844)

Proceeds from issuance of long-term debt

2,234

Repayment of long-term debt

(40)

(2,416)

Net decrease in short-term borrowings

NET CASH USED IN FINANCING ACTIVITIES

(356)

(747)

Net decrease in cash before translation effect

(369)

(296)

Translation effect on cash

Cash, beginning of period

1,705

1,764

Cash, end of period

$ 1,346

$ 1,475

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

CONSOLIDATED STATEMENT OF 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, 2010	$ 31,444	$ 11,920	$ (3,136)	$ 25,210	$ (2,768)	$ 218
Net income	943			944		(1)
Currency translation adjustments	131				129	2
Changes in fair value of derivatives	(35)				(35)
Deferred employee benefits liabilities	31				31
Shares sold to optionees, less shares exchanged	146	(8)	154
Vesting of restricted stock		(10)	10
Shares issued under employee stock purchase plan	90	14	76
Stock repurchase program	(844)		(844)
Stock-based compensation expense	67	67
Dividends declared ($0.275 per share and $0.25 per share)	(340)			(340)
Other	(7)					(7)
Ending Balance at Mar. 31, 2011	31,626	11,983	(3,740)	25,814	(2,643)	212
Beginning Balance at Dec. 31, 2011	$ 31,392	$ 11,639	$ (5,679)	28,860	(3,557)	129
Beginning Balance, in Shares at Dec. 31, 2011	1,334	1,434	(100)
Net income	$ 1,310			1,301		9
Currency translation adjustments	111				111
Changes in fair value of derivatives	45				45
Deferred employee benefits liabilities	36				36
Shares sold to optionees, less shares exchanged	88	$ (33)	$ 121
Vesting of restricted stock		(11)	11
Shares issued under employee stock purchase plan	115	11	104
Stock repurchase program	(324)		$ (324)
Stock-based compensation expense	79	79
Dividends declared ($0.275 per share and $0.25 per share)	(367)			(367)
Other	$ 3					3
Shares sold to optionees, less shares exchanged, in Shares	2		2
Shares issued under employee stock purchase plan, in Shares	2		2
Stock repurchase program, in Shares	(4)		(4)
Ending Balance at Mar. 31, 2012	$ 32,488	$ 11,685	$ (5,767)	$ 29,794	$ (3,365)	$ 141
Ending Balance, in Shares at Mar. 31, 2012	1,334	1,434	(100)

CONSOLIDATED STATEMENT OF EQUITY (Unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Dividends declared, per share	$ 0.275	$ 0.25
Retained Earnings
Dividends declared, per share	$ 0.275	$ 0.25

Basis of Presentation

3 Months Ended

Mar. 31, 2012

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 three-month period ended March 31, 2012 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2012. The December 31, 2011 balance sheet information has been derived from the Schlumberger 2011 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, 2011, filed with the Securities and Exchange Commission on February 1, 2012.

- 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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6359553&loc=d3e288-107754

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2197480

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6921930&loc=d3e5614-111684

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 915
-SubTopic 235
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6472506&loc=d3e38932-110933

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2209116

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6970148&loc=SL6228881-111685

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2122150

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6359566&loc=d3e326-107755

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 15
-URI http://asc.fasb.org/subtopic&trid=2122524

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-URI http://asc.fasb.org/subtopic&trid=2134480

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS140-4/FIN46(R)-8
-Paragraph 8, C1, C7
-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

3 Months Ended

Mar. 31, 2012

Charges and Credits [Abstract]

Charges and Credits

2. Charges and Credits

Schlumberger recorded the following charges and credits during the first three months of 2012 and 2011:

2012

•

Schlumberger recorded $15 million of pretax merger and integration-related charges ($13 million after-tax) in connection with the August 27, 2010 acquisition of Smith International, Inc. (“Smith”). This amount is classified in Merger & integration in the Consolidated Statement of Income.

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.

- 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

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Earnings Per Share

3. Earnings Per Share

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


							(Stated in millions, except per share amounts)
	2012						2011
	Schlumberger Income from Continuing Operations		Average Shares Outstanding		Earnings per Share from Continuing Operations		Schlumberger Income from Continuing Operations		Average Shares Outstanding		Earnings per Share from Continuing Operations
First Quarter
Basic	$	1,301		1,334	$	0.98	$	944		1,360	$	0.69

Assumed exercise of stock options		—		7				—		13
Unvested restricted stock		—		3				—		2

Diluted	$	1,301		1,344	$	0.97	$	944		1,375	$	0.69

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)
	2012		2011
First Quarter		14		1

Inventories

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

Inventories

4. Inventories

A summary of inventories follows:


	(Stated in millions)
	Mar. 31, 2012		Dec. 31, 2011
Raw materials & field materials	$	2,300	$	2,066
Work in process		368		364
Finished goods		2,450		2,270

	$	5,118	$	4,700

Fixed Assets

3 Months Ended

Mar. 31, 2012

Fixed Assets [Abstract]

Fixed Assets

5. Fixed Assets

A summary of fixed assets follows:


	(Stated in millions)
	Mar. 31, 2012		Dec. 31, 2011
Property, plant & equipment	$	30,394	$	29,551
Less: Accumulated depreciation		17,080		16,558

	$	13,314	$	12,993

Depreciation expense relating to fixed assets was $701 million and $661 million in the first quarter of 2012 and 2011, respectively.

- 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

3 Months Ended

Mar. 31, 2012

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data

6. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the three months ended March 31, 2012 was as follows:


	(Stated in millions)
Balance at December 31, 2011	$	425
Capitalized in period		101
Charged to expense		(72	)

Balance at March 31, 2012	$	454

Goodwill

3 Months Ended

Mar. 31, 2012

Goodwill [Abstract]

Goodwill

7. Goodwill

The changes in the carrying amount of goodwill by reporting unit for the three months ended March 31, 2012 were as follows:


								(Stated in millions)
	Reservoir Characterization		Drilling			Production		Distribution		Total
Balance at January 1, 2012	$	3,360	$	8,362		$	2,356	$	76	$	14,154
Reallocation		—		(125	)		125		—		—
Impact of changes in exchange rates		18		13			14		—		45

Balance at March 31, 2012	$	3,378	$	8,250		$	2,495	$	76	$	14,199

Intangible Assets

3 Months Ended

Mar. 31, 2012

Intangible Assets [Abstract]

Intangible Assets

8. Intangible Assets

The gross book value, accumulated amortization and net book value of intangible assets were as follows:


									(Stated in millions )
	Mar. 31, 2012						Dec. 31, 2011
	Gross Book Value		Accumulated Amortization		Net Book Value		Gross Book Value		Accumulated Amortization		Net Book Value
Technology/Technical Know-How	$	1,876	$	374	$	1,502	$	1,875	$	341	$	1,534
Tradenames		1,668		138		1,530		1,677		131		1,546
Customer Relationships		1,961		236		1,725		1,954		209		1,745
Other		354		306		48		356		299		57

	$	5,859	$	1,054	$	4,805	$	5,862	$	980	$	4,882

Amortization expense was $80 million during the first quarter of 2012 and $84 million during the same period of 2011.

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

Based on the net book value of intangible assets at March 31, 2012, amortization charged to income for the subsequent five years is estimated to be: remainder of 2012 - $241 million; 2013 - $304 million; 2014 - $298 million; 2015 - $287 million; 2016 - $268 million; and 2017 - $260 million.

Long-term Debt

3 Months Ended

Mar. 31, 2012

Long-term Debt [Abstract]

Long-term Debt

9. Long-term Debt

A summary of Long-term Debt follows:


	(Stated in millions)
	Mar. 31, 2012		Dec. 31, 2011
3.300% Senior Notes due 2021	$	1,595	$	1,595
4.50% Guaranteed Notes due 2014		1,343		1,290
2.75% Guaranteed Notes due 2015		1,336		1,297
1.950% Senior Notes due 2016		1,099		1,099
4.200% Senior Notes due 2021		1,099		1,099
5.25% Guaranteed Notes due 2013		671		649
2.650% Senior Notes due 2016		498		498
3.00% Guaranteed Notes due 2013		—		450
Floating Rate Senior Notes due 2014		300		300
Commercial paper borrowing		226		—
Other variable rate debt		272		271

		8,439		8,548
Fair value adjustment - hedging ⁽¹⁾		—		8

	$	8,439	$	8,556

⁽¹⁾	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 first quarter of 2011, Schlumberger issued $1.1 billion of 4.200% Senior Notes due 2021.

During the first quarter of 2011, Schlumberger issued $500 million of 2.650% Senior 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%.

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.

The estimated fair value of Schlumberger’s Long-term Debt at March 31, 2012 and December 31, 2011, based on quoted market prices, was $8.8 billion and $8.9 billion, respectively.

Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2012

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 85 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 March 31, 2012, Schlumberger recognized a cumulative net $19 million gain 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 March 31, 2012, contracts were outstanding for the US dollar equivalent of $5.2 billion in various foreign currencies, of which $3.9 billion relate to hedges of debt denominated in currencies other than the functional currency.

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 March 31, 2012, $23 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 relating to a certain debt instrument. The swap was 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 3.0% annually and will pay 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 losses and gains 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 March 31, 2012, Schlumberger had fixed rate debt aggregating $7.7 billion and variable rate debt aggregating $2.5 billion, after taking into account the effects of the interest rate swaps.

Short-term investments and Fixed income investments, held to maturity, totaled $3.0 billion at March 31, 2012, 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				*Consolidated Balance Sheet* Classification
	Mar. 31, 2012		Dec. 31, 2011
Derivative Assets
Derivatives designated as hedges:
Foreign exchange contracts	$	9	$	2	Other current assets
Foreign exchange contracts		39		4	Other Assets
Interest rate swaps		8		9	Other Assets

	$	56	$	15

Derivatives not designated as hedges:
Foreign exchange contracts	$	6	$	8	Other current assets
Foreign exchange contracts		7		9	Other Assets

	$	13	$	17

	$	69	$	32

Derivative Liabilities
Derivatives designated as hedges:
Foreign exchange contracts	$	13	$	47	Accounts payable and accrued liabilities
Foreign exchange contracts		65		130	Other Liabilities

	$	78	$	177

Derivatives not designated as hedges:
Foreign exchange contracts	$	5	$	9	Accounts payable and accrued liabilities
Commodity contacts		—		3	Accounts payable and accrued liabilities

	$	5	$	12

	$	83	$	189

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
	First Quarter						*Consolidated Statement* *of Income* Classification
	2012			2011
Derivatives designated as fair value hedges:
Foreign exchange contracts	$	—		$	2			Cost of revenue -Oilfield Services
Interest rate swaps		1			—			Interest expense

	$	1		$	2

Derivatives not designated as hedges:
Foreign exchange contracts	$	(27	)	$	(21	)		Cost of revenue -Oilfield Services
Commodity contracts		2			1			Cost of revenue -Oilfield Services

	$	(25	)	$	(20	)

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
	First Quarter					*Consolidated Statement* *of Income* Classification
	2012			2011
Foreign exchange contracts	$	112		$	225	Cost of revenue -Oilfield Services
Foreign exchange contracts		(2	)		2	Research & engineering

	$	110		$	227


	(Stated in millions)
	Gain (Loss) Recognized in
	First Quarter
	2012		2011
Foreign exchange contracts	$	155	$	192

- 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)
-Number 133
-Paragraph 44
-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 Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80784-113994

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579245-113959

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624163-113959

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41638-113959

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5580258-113959

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5579240-113959

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41641-113959

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41620-113959

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 25
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4E
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624181-113959

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5618551-113959

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624177-113959

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6887037&loc=d3e80748-113994

Reference 17: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4H
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624258-113959

Reference 18: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708775-113959

Reference 19: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6935481&loc=d3e41635-113959

Reference 20: 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.(n))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 21: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5708773-113959

Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993

+ Details

Income Tax

3 Months Ended

Mar. 31, 2012

Income Tax [Abstract]

Income Tax

11. Income Tax

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


	(Stated in millions)
	First Quarter
	2012		2011
United States	$	591	$	365
Outside United States		1,130		873

	$	1,721	$	1,238

During the first quarter of 2012, Schlumberger recorded pretax charges of $15 million ($11 million in the US and $4 million outside of the US).

Schlumberger recorded pretax charges of $34 million during the three months ended March 31, 2011 ($23 million in the US and $11 million outside of the US).

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

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


	(Stated in millions)
	Mar. 31, 2012			Dec. 31, 2011
Postretirement benefits, net	$	412		$	440
Intangible assets		(1,471	)		(1,498	)
Investments in non-US subsidiaries		(348	)		(349	)
Other, net		145			132

	$	(1,262	)	$	(1,275	)

The above deferred tax balances at March 31, 2012 and December 31, 2011 were net of valuation allowances relating to net operating losses in certain countries of $245 million and $239 million, respectively.

The components of consolidated Taxes on income were as follows:


	(Stated in millions)
	First Quarter
	2012			2011
Current:
United States - Federal	$	199		$	155
United States - State		18			16
Outside United States		212			64

	$	429		$	235

Deferred:
United States - Federal	$	(34	)	$	(29	)
United States - State		(3	)		3
Outside United States		19			93
Valuation allowance		—			(7	)

	$	(18	)	$	60

Consolidated taxes on income	$	411		$	295

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


	First Quarter
	2012			2011
US federal statutory rate		35	%		35	%
US state income taxes		1			1
Non-US income taxed at different rates		(10	)		(11	)
Other		(2	)		(1	)

Effective income tax rate		24	%		24	%

- 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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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
-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 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 6: 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.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

Contingencies

3 Months Ended

Mar. 31, 2012

Contingencies [Abstract]

Contingencies

12. 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.

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.

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)
-Number 5
-Paragraph 9, 10, 11, 12
-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 Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25287-109308

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6449706&loc=d3e16207-108621

+ Details

Segment Information

3 Months Ended

Mar. 31, 2012

Segment Information [Abstract]

Segment Information

13. Segment Information


							(Stated in millions)
	First Quarter 2012						First Quarter 2011
	Revenue			Income before taxes			Revenue			Income before taxes
Oilfield Services
Reservoir Characterization	$	2,586		$	672		$	2,193		$	460
Drilling ⁽¹⁾		3,785			657			3,112			465
Production ⁽¹⁾		3,539			621			2,808			531
Eliminations & other		8			(7	)		9			(1	)

		9,918			1,943			8,122			1,455

Distribution		713			35			601			22
Eliminations		(20	)		—			(7	)		—

		693			35			594			22

Corporate & other		—			(172	)		—			(143	)
Interest income ⁽²⁾		—			10			—			9
Interest expense ⁽³⁾		—			(80	)		—			(71	)
Charges and credits (see Note 2)		—			(15	)		—			(34	)

	$	10,611		$	1,721		$	8,716		$	1,238

⁽¹⁾	Effective January 1, 2012, a component of the Drilling Group has been reallocated to the Production Group. Historical segment information has been reclassified to conform to this new presentation.

⁽ ² ⁾

Excludes interest income included in the segment results ($- million in 2012; $- million in 2011).

⁽ ³ ⁾

Excludes interest expense included in the segment results ($- million in 2012; $2 million in 2011).

- 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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8981-108599

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8984-108599

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9054-108599

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9031-108599

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8538-108599

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8864-108599

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8971-108599

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8844-108599

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8380-108599

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8595-108599

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8933-108599

+ Details

Pension and Other Postretirement Benefits

3 Months Ended

Mar. 31, 2012

Pension and Other Postretirement Benefits [Abstract]

Pension and Other Postretirement Benefits

14. Pension and Other Postretirement Benefits

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


				(Stated in millions)
	First Quarter
	2012						2011
	US			Int’l			US			Int’l
Service cost - benefits earned during period	$	17		$	21		$	16		$	17
Interest cost on projected benefit obligation		38			58			38			56
Expected return on plan assets		(46	)		(80	)		(43	)		(70	)
Amortization of prior service cost		3			30			3			31
Amortization of net loss		23			15			22			8

	$	35		$	44		$	36		$	42

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


	(Stated in millions)
	First Quarter
	2012			2011
Service cost - benefits earned during period	$	7		$	7
Interest cost on accumulated postretirement benefit obligation		15			14
Expected return on plan assets		(7	)		(5	)
Amortization of prior service cost		(2	)		(3	)
Amortization of net loss		5			3

	$	18		$	16

- 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.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph b
-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 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 Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph q
-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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 8
-Subparagraph m
-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 6: 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 7: 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 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-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 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-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 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS106-2
-Paragraph 20, 21, 22
-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 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 158
-Paragraph 7, 21, 22
-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 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-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 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-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 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

Subsequent Event

3 Months Ended

Mar. 31, 2012

Subsequent Event [Abstract]

Subsequent Event

15. Subsequent Event

On April 10, 2012 Schlumberger entered into an agreement to sell its Wilson distribution business, a component of its Distribution segment, to National Oilwell Varco, Inc. for approximately $0.8 billion in cash (this transaction does not include Schlumberger’s interest in CE Franklin Ltd.). Closing of this transaction is subject to customary regulatory approvals. The Wilson distribution business generated revenue of approximately $2.1 billion during 2011.

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2012

Earnings Per Share [Abstract]

Reconciliation of Earnings Per Share


							(Stated in millions, except per share amounts)
	2012						2011
	Schlumberger Income from Continuing Operations		Average Shares Outstanding		Earnings per Share from Continuing Operations		Schlumberger Income from Continuing Operations		Average Shares Outstanding		Earnings per Share from Continuing Operations
First Quarter
Basic	$	1,301		1,334	$	0.98	$	944		1,360	$	0.69

Assumed exercise of stock options		—		7				—		13
Unvested restricted stock		—		3				—		2

Diluted	$	1,301		1,344	$	0.97	$	944		1,375	$	0.69

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	(Stated in millions)
	2012		2011
First Quarter		14		1

Inventories (Tables)

3 Months Ended

Mar. 31, 2012

Inventories [Abstract]

Inventory Disclosure


	(Stated in millions)
	Mar. 31, 2012		Dec. 31, 2011
Raw materials & field materials	$	2,300	$	2,066
Work in process		368		364
Finished goods		2,450		2,270

	$	5,118	$	4,700

Fixed Assets (Tables)

3 Months Ended

Mar. 31, 2012

Fixed Assets [Abstract]

Property, Plant and Equipment


	(Stated in millions)
	Mar. 31, 2012		Dec. 31, 2011
Property, plant & equipment	$	30,394	$	29,551
Less: Accumulated depreciation		17,080		16,558

	$	13,314	$	12,993

Multiclient Seismic Data (Tables)

3 Months Ended

Mar. 31, 2012

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data Table


	(Stated in millions)
Balance at December 31, 2011	$	425
Capitalized in period		101
Charged to expense		(72	)

Balance at March 31, 2012	$	454

Goodwill (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill [Abstract]

Changes in the carrying amount of goodwill


								(Stated in millions)
	Reservoir Characterization		Drilling			Production		Distribution		Total
Balance at January 1, 2012	$	3,360	$	8,362		$	2,356	$	76	$	14,154
Reallocation		—		(125	)		125		—		—
Impact of changes in exchange rates		18		13			14		—		45

Balance at March 31, 2012	$	3,378	$	8,250		$	2,495	$	76	$	14,199

Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2012

Intangible Assets [Abstract]

Schedule of Intangible Assets by Major Class


									(Stated in millions )
	Mar. 31, 2012						Dec. 31, 2011
	Gross Book Value		Accumulated Amortization		Net Book Value		Gross Book Value		Accumulated Amortization		Net Book Value
Technology/Technical Know-How	$	1,876	$	374	$	1,502	$	1,875	$	341	$	1,534
Tradenames		1,668		138		1,530		1,677		131		1,546
Customer Relationships		1,961		236		1,725		1,954		209		1,745
Other		354		306		48		356		299		57

	$	5,859	$	1,054	$	4,805	$	5,862	$	980	$	4,882

Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2012

Long-term Debt [Abstract]

Long-term Debt


	(Stated in millions)
	Mar. 31, 2012		Dec. 31, 2011
3.300% Senior Notes due 2021	$	1,595	$	1,595
4.50% Guaranteed Notes due 2014		1,343		1,290
2.75% Guaranteed Notes due 2015		1,336		1,297
1.950% Senior Notes due 2016		1,099		1,099
4.200% Senior Notes due 2021		1,099		1,099
5.25% Guaranteed Notes due 2013		671		649
2.650% Senior Notes due 2016		498		498
3.00% Guaranteed Notes due 2013		—		450
Floating Rate Senior Notes due 2014		300		300
Commercial paper borrowing		226		—
Other variable rate debt		272		271

		8,439		8,548
Fair value adjustment - hedging ⁽¹⁾		—		8

	$	8,439	$	8,556

⁽¹⁾	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.

- 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

Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2012

Derivative Instruments and Hedging Activities [Abstract]

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


	(Stated in millions)
	Fair Value of Derivatives				*Consolidated Balance Sheet* Classification
	Mar. 31, 2012		Dec. 31, 2011
Derivative Assets
Derivatives designated as hedges:
Foreign exchange contracts	$	9	$	2	Other current assets
Foreign exchange contracts		39		4	Other Assets
Interest rate swaps		8		9	Other Assets

	$	56	$	15

Derivatives not designated as hedges:
Foreign exchange contracts	$	6	$	8	Other current assets
Foreign exchange contracts		7		9	Other Assets

	$	13	$	17

	$	69	$	32

Derivative Liabilities
Derivatives designated as hedges:
Foreign exchange contracts	$	13	$	47	Accounts payable and accrued liabilities
Foreign exchange contracts		65		130	Other Liabilities

	$	78	$	177

Derivatives not designated as hedges:
Foreign exchange contracts	$	5	$	9	Accounts payable and accrued liabilities
Commodity contacts		—		3	Accounts payable and accrued liabilities

	$	5	$	12

	$	83	$	189

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


	(Stated in millions)
	Gain (Loss) Recognized in Income
	First Quarter						*Consolidated Statement* *of Income* Classification
	2012			2011
Derivatives designated as fair value hedges:
Foreign exchange contracts	$	—		$	2			Cost of revenue -Oilfield Services
Interest rate swaps		1			—			Interest expense

	$	1		$	2

Derivatives not designated as hedges:
Foreign exchange contracts	$	(27	)	$	(21	)		Cost of revenue -Oilfield Services
Commodity contracts		2			1			Cost of revenue -Oilfield Services

	$	(25	)	$	(20	)

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


	(Stated in millions)
	Gain (Loss) Reclassified from Accumulated OCI into Income
	First Quarter					*Consolidated Statement* *of Income* Classification
	2012			2011
Foreign exchange contracts	$	112		$	225	Cost of revenue -Oilfield Services
Foreign exchange contracts		(2	)		2	Research & engineering

	$	110		$	227


	(Stated in millions)
	Gain (Loss) Recognized in
	First Quarter
	2012		2011
Foreign exchange contracts	$	155	$	192

- 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

Income Tax (Tables)

3 Months Ended

Mar. 31, 2012

Income Tax [Abstract]

Income Tax Disclosure Table


	(Stated in millions)
	First Quarter
	2012		2011
United States	$	591	$	365
Outside United States		1,130		873

	$	1,721	$	1,238

Components of Net Deferred Tax Assets


	(Stated in millions)
	Mar. 31, 2012			Dec. 31, 2011
Postretirement benefits, net	$	412		$	440
Intangible assets		(1,471	)		(1,498	)
Investments in non-US subsidiaries		(348	)		(349	)
Other, net		145			132

	$	(1,262	)	$	(1,275	)

Components of Consolidated Income Taxes


	(Stated in millions)
	First Quarter
	2012			2011
Current:
United States - Federal	$	199		$	155
United States - State		18			16
Outside United States		212			64

	$	429		$	235

Deferred:
United States - Federal	$	(34	)	$	(29	)
United States - State		(3	)		3
Outside United States		19			93
Valuation allowance		—			(7	)

	$	(18	)	$	60

Consolidated taxes on income	$	411		$	295

Reconciliation of the US Statutory Federal Tax Rate


	First Quarter
	2012			2011
US federal statutory rate		35	%		35	%
US state income taxes		1			1
Non-US income taxed at different rates		(10	)		(11	)
Other		(2	)		(1	)

Effective income tax rate		24	%		24	%

Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Segment Information [Abstract]

Schedule of Segment Reporting Information, by Segment


							(Stated in millions)
	First Quarter 2012						First Quarter 2011
	Revenue			Income before taxes			Revenue			Income before taxes
Oilfield Services
Reservoir Characterization	$	2,586		$	672		$	2,193		$	460
Drilling ⁽¹⁾		3,785			657			3,112			465
Production ⁽¹⁾		3,539			621			2,808			531
Eliminations & other		8			(7	)		9			(1	)

		9,918			1,943			8,122			1,455

Distribution		713			35			601			22
Eliminations		(20	)		—			(7	)		—

		693			35			594			22

Corporate & other		—			(172	)		—			(143	)
Interest income ⁽²⁾		—			10			—			9
Interest expense ⁽³⁾		—			(80	)		—			(71	)
Charges and credits (see Note 2)		—			(15	)		—			(34	)

	$	10,611		$	1,721		$	8,716		$	1,238

⁽¹⁾	Effective January 1, 2012, a component of the Drilling Group has been reallocated to the Production Group. Historical segment information has been reclassified to conform to this new presentation.

⁽ ² ⁾

Excludes interest income included in the segment results ($- million in 2012; $- million in 2011).

⁽ ³ ⁾

Excludes interest expense included in the segment results ($- million in 2012; $2 million in 2011).

- 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 Benefit (Tables)

3 Months Ended

Mar. 31, 2012

Pension Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

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


				(Stated in millions)
	First Quarter
	2012						2011
	US			Int’l			US			Int’l
Service cost - benefits earned during period	$	17		$	21		$	16		$	17
Interest cost on projected benefit obligation		38			58			38			56
Expected return on plan assets		(46	)		(80	)		(43	)		(70	)
Amortization of prior service cost		3			30			3			31
Amortization of net loss		23			15			22			8

	$	35		$	44		$	36		$	42

Postretirement Medical Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

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


	(Stated in millions)
	First Quarter
	2012			2011
Service cost - benefits earned during period	$	7		$	7
Interest cost on accumulated postretirement benefit obligation		15			14
Expected return on plan assets		(7	)		(5	)
Amortization of prior service cost		(2	)		(3	)
Amortization of net loss		5			3

	$	18		$	16

Charges and Credits (Details) - USD ($) $ in Millions	3 Months Ended
Charges and Credits (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Summary of Charges and Credit (Textual) [Abstract]
Charges pretax	$ 15	$ 34
Merger-related transaction costs [Member]
Summary of Charges and Credit (Textual) [Abstract]
Charges pretax	15	34
Charges, net	$ 13	$ 28

Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions

3 Months Ended

Mar. 31, 2012

Mar. 31, 2011

Schlumberger Income from Continuing Operations

Basic

$ 1,301

$ 944

Assumed exercise of stock options

Unvested restricted stock

Diluted

$ 1,301

$ 944

Average Shares Outstanding

Basic

1,334

1,360

Assumed exercise of stock options

^[1]

Unvested restricted stock

Diluted

1,344

1,375

Earnings Per Share from Continuing Operations

Basic

$ 0.98

$ 0.69

Diluted

$ 0.97

$ 0.69

[1]	Net of the effect of business acquisitions and divestitures.

Earnings Per Share (Details 1) - shares shares in Millions	3 Months Ended
Earnings Per Share (Details 1) - shares shares in Millions	Mar. 31, 2012	Mar. 31, 2011
Outstanding Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Employee stock options to purchase	14	1

- 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

Inventories (Details) - USD ($)
$ in Millions

Mar. 31, 2012

Dec. 31, 2011

Inventory

Raw materials & field materials

$ 2,300

$ 2,066

^[1]

Work in process

368

364

Finished goods

2,450

2,270

Inventories

$ 5,118

$ 4,700

[1]

Fixed Assets (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment
Property, plant & equipment	$ 30,394	$ 29,551
Less: Accumulated depreciation	17,080	16,558
Fixed assets less accumulated depreciation	$ 13,314	$ 12,993

- 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 Textual) - USD ($)
$ in Millions

3 Months Ended

Mar. 31, 2012

Mar. 31, 2011

Fixed Assets (Textual) [Abstract]

Depreciation expense relating to fixed assets

$ 701

^[1]

$ 661

[1]	Net of the effect of business acquisitions and divestitures.

Multiclient Seismic Data (Details) $ in Millions	3 Months Ended
Multiclient Seismic Data (Details) $ in Millions	Mar. 31, 2012 USD ($)
Multiclient Seismic Data
Balance at December 31, 2011	$ 425
Capitalized in period	101
Charged to expense	(72)
Balance at March 31, 2012	$ 454

Goodwill (Details) $ in Millions	3 Months Ended
Goodwill (Details) $ in Millions	Mar. 31, 2012 USD ($)
Schedule of Goodwill
Balance at January 1, 2012	$ 14,154
Impact of changes in exchange rates	45
Balance at March 31, 2012	14,199
Reservoir Characterization [Member]
Schedule of Goodwill
Balance at January 1, 2012	3,360
Impact of changes in exchange rates	18
Balance at March 31, 2012	3,378
Drilling [Member]
Schedule of Goodwill
Balance at January 1, 2012	8,362
Reallocation	(125)
Impact of changes in exchange rates	13
Balance at March 31, 2012	8,250
Production [Member]
Schedule of Goodwill
Balance at January 1, 2012	2,356
Reallocation	125
Impact of changes in exchange rates	14
Balance at March 31, 2012	2,495
Distribution [Member]
Schedule of Goodwill
Balance at January 1, 2012	76
Balance at March 31, 2012	$ 76

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-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 142
-Paragraph 43
-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 141R
-Paragraph 68
-Subparagraph l
-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 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-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 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-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 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-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

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Subparagraph e
-Paragraph 45
-Clause 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-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 Statement of Financial Accounting Standard (FAS)
-Number 142
-Subparagraph e
-Paragraph 45
-Clause 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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Subparagraph e
-Paragraph 45
-Clause 7
-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

Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Gross book value and accumulated amortization of intangible assets
Gross Book Value	$ 5,859	$ 5,862
Accumulated Amortization	1,054	980
Intangible Assets, Net (Excluding Goodwill), Total	4,805	4,882
Technology/Technical Know-How [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	1,876	1,875
Accumulated Amortization	374	341
Intangible Assets, Net (Excluding Goodwill), Total	1,502	1,534
Tradenames [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	1,668	1,677
Accumulated Amortization	138	131
Intangible Assets, Net (Excluding Goodwill), Total	1,530	1,546
Customer Relationships [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	1,961	1,954
Accumulated Amortization	236	209
Intangible Assets, Net (Excluding Goodwill), Total	1,725	1,745
Other [Member]
Gross book value and accumulated amortization of intangible assets
Gross Book Value	354	356
Accumulated Amortization	306	299
Intangible Assets, Net (Excluding Goodwill), Total	$ 48	$ 57

Intangible Assets (Details 1) $ in Millions	3 Months Ended
Intangible Assets (Details 1) $ in Millions	Mar. 31, 2012 USD ($) yr	Mar. 31, 2011 USD ($)
Intangible Assets - Additional Information
Amortization expense on intangible assets excluding goodwill	$ 80	$ 84
Weighted Average Amortization Period for all Intangible Assets (Years) \| yr	21
Estimated amortization charged to income, 2012	$ 241
Estimated amortization charged to income, 2013	304
Estimated amortization charged to income, 2014	298
Estimated amortization charged to income, 2015	287
Estimated amortization charged to income, 2016	268
Estimated amortization charged to income, 2017	$ 260

Long-term Debt (Details) - USD ($)
$ in Millions

Mar. 31, 2012

Dec. 31, 2011

Summary of Long-Term Debt

Long-term debt, carrying amount

$ 8,439

$ 8,548

Fair value adjustment-hedging

Other Long-term Debt, Noncurrent, Total

8,439

8,556

Other variable rate debt [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

272

^[1]

271

3.300% Senior Notes due 2021 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

1,595

4.50% Guaranteed Notes due 2014 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

1,343

1,290

2.75% Guaranteed Notes due 2015 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

1,336

1,297

1.950% Senior Notes due 2016 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

1,099

4.200% Guaranteed Notes due 2021 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

1,099

5.25% Guaranteed Notes due 2013 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

671

649

2.650% Senior Notes due 2016 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

498

3.00% Guaranteed Notes due 2013 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

450

Floating Rate Senior Notes due 2014 [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

300

$ 300

Commercial Paper Borrowing [Member]

Summary of Long-Term Debt

Long-term debt, carrying amount

$ 226

[1]	Net of the effect of business acquisitions and divestitures.

Long-term Debt (Details Textual) - USD ($) $ in Millions	3 Months Ended
Long-term Debt (Details Textual) - USD ($) $ in Millions	Mar. 31, 2011	Mar. 31, 2012	Dec. 31, 2011
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		$ 8,439	$ 8,548
Long-term Debt (Textual) [Abstract]
Repurchase of senior notes	$ 1,260
Long-term debt, fair value		8,800	8,900
3.300% Senior Notes due 2021 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		1,595	1,595
4.50% Guaranteed Notes due 2014 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		1,343	1,290
2.75% Guaranteed Notes due 2015 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		1,336	1,297
1.950% Senior Notes due 2016 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		$ 1,099	1,099
4.200% Senior Notes due 2021 [Member]
Long-term Debt (Additional Textual) [Abstract]
Debt instrument interest rate		4.20%
Face amount of debt instrument	1,100
5.25% Guaranteed Notes due 2013 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		$ 671	649
2.650% Senior Notes due 2016 [Member]
Long-term Debt (Additional Textual) [Abstract]
Debt instrument interest rate		2.65%
Effective interest rate on euro denominated debt		2.39%
Face amount of debt instrument	$ 500
Long-term debt, carrying amount		$ 498	498
3.00% Guaranteed Notes due 2013 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount			450
Floating Rate Senior Notes due 2014 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		$ 300	300
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%
4.200% Guaranteed Notes due 2021 [Member]
Long-term Debt (Additional Textual) [Abstract]
Long-term debt, carrying amount		$ 1,099	$ 1,099

Derivative Instruments and Hedging Activities (Details) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Derivative assets
Derivative assets	$ 69	$ 32
Derivative Liabilities
Derivative Liabilities	83	189
Designated as Hedging Instrument [Member]
Derivative assets
Derivative assets	56	15
Derivative Liabilities
Derivative Liabilities	78	177
Designated as Hedging Instrument [Member] \| Other Assets [Member]
Derivative assets
Derivative assets	39
Nondesignated [Member]
Derivative assets
Derivative assets	13	17
Derivative Liabilities
Derivative Liabilities	5	12
Foreign Exchange Contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Current Assets [Member]
Derivative assets
Derivative assets	9	2
Foreign Exchange Contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Assets [Member]
Derivative assets
Derivative assets		4
Foreign Exchange Contracts [Member] \| Designated as Hedging Instrument [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	13	47
Foreign Exchange Contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	65	130
Foreign Exchange Contracts [Member] \| Nondesignated [Member] \| Other Current Assets [Member]
Derivative assets
Derivative assets	6	8
Foreign Exchange Contracts [Member] \| Nondesignated [Member] \| Other Assets [Member]
Derivative assets
Derivative assets	7	9
Foreign Exchange Contracts [Member] \| Nondesignated [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	5	9
Interest Rate Swaps [Member] \| Designated as Hedging Instrument [Member] \| Other Assets [Member]
Derivative assets
Derivative assets	$ 8	9
Commodity Contracts [Member] \| Nondesignated [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivative Liabilities
Derivative Liabilities		$ 3

Derivative Instruments and Hedging Activities (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
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	$ 1	$ 2
Fair Value Hedging [Member] \| Foreign Exchange Contracts [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		2
Fair Value Hedging [Member] \| Interest Rate Swaps [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	1
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	(25)	(20)
Nondesignated [Member] \| Foreign Exchange Contracts [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	(27)	(21)
Nondesignated [Member] \| Commodity Contracts [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	$ 2	$ 1

- Definition

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References + Details

Derivative Instruments and Hedging Activities (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Gain (loss) reclassified from accumulated OCI into income	$ 110	$ 227
Foreign Exchange Contracts [Member] \| Cost of revenue - Oilfield Services [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Gain (loss) reclassified from accumulated OCI into income	112	225
Foreign Exchange Contracts [Member] \| Research & engineering [Member]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net
Gain (loss) reclassified from accumulated OCI into income	$ (2)	$ 2

Derivative Instruments and Hedging Activities (Details 3) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Foreign Exchange Contracts [Member]
Effect of derivative instruments in cash flow hedging relationships on income and other comprehensive income (OCI)
Gain (loss) recognized in OCI	$ 155	$ 192

Derivative Instruments and Hedging Activities (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($) Country	Sep. 30, 2009 USD ($)
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Contracts outstanding in various foreign currencies relate to hedges of debt	$ 5,200
Derivative Instruments and Hedging Activities (Additional Textual) [Abstract]
Number of countries in which Schlumberger conducts business \| Country	85
Recognized a cumulative net loss in Equity relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges	$ 19
Contracts outstanding in various foreign currencies (US dollar equivalent)	5,200
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps	7,700
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps	2,500
Short-term investments and Fixed income investments, held to maturity	3,000
Designated as Hedging Instrument [Member] \| Debt [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Contracts outstanding in various foreign currencies relate to hedges of debt	3,900
Derivative Instruments and Hedging Activities (Additional Textual) [Abstract]
Contracts outstanding in various foreign currencies (US dollar equivalent)	3,900
Commodity Contracts [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Commodity forward contract outstanding	$ 23
3.00% Guaranteed Notes due 2013 [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
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 Instruments and Hedging Activities (Textual) [Abstract]
Derivative swap interest rate		3.00%
3.00% Guaranteed Notes due 2013 [Member] \| Floating Rate Debt [Member]
Derivative Instruments and Hedging Activities (Textual) [Abstract]
Derivative swap interest rate		0.765%

Income Tax (Details) - USD ($) $ in Millions	3 Months Ended
Income Tax (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Income from before taxes subject to US and Non-US Income Taxes
United States	$ 591	$ 365
Outside United States	1,130	873
Income (Loss) from Continuing Operations before Income Taxes and Minority Interest, Total	$ 1,721	$ 1,238

Income Tax (Details 1) - USD ($) $ in Millions	Mar. 31, 2012	Dec. 31, 2011
Components of Net Deferred Tax Assets
Postretirement benefits, net	$ 412	$ 440
Intangible assets	(1,471)	(1,498)
Investments in non-US Subsidiaries	(348)	(349)
Other, net	145	132
Net deferred tax assets	$ (1,262)	$ (1,275)

- 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
Income Tax (Details 2) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Current:
United States - Federal	$ 199	$ 155
United States - State	18	16
Outside United States	212	64
Current Income Tax Expense (Benefit), Total	429	235
Deferred:
United States - Federal	(34)	(29)
United States - State	(3)	3
Outside United States	19	93
Valuation allowance		(7)
Deferred income taxes	(18)	60
Consolidated taxes on income	$ 411	$ 295

Income Tax (Details 3)	3 Months Ended
Income Tax (Details 3)	Mar. 31, 2012	Mar. 31, 2011
Reconciliation of the US statutory federal tax rate to the consolidated effective income tax rate
US statutory federal rate	35.00%	35.00%
US state income taxes	1.00%	1.00%
Non-US income taxed at different rates	(10.00%)	(11.00%)
Other	(2.00%)	(1.00%)
Effective income tax rate	24.00%	24.00%

Income Tax (Details Textual) - USD ($) $ in Millions	3 Months Ended
Income Tax (Details Textual) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Income Tax (Textual) [Abstract]
Charges pretax	$ 15	$ 34
Income Tax (Additional Textual) [Abstract]
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	$ 245		$ 239
US statutory federal rate	35.00%	35.00%
Domestic Country [Member]
Income Tax (Textual) [Abstract]
Charges pretax	$ 11	$ 23
Foreign Country [Member]
Income Tax (Textual) [Abstract]
Charges pretax	$ 4	$ 11

Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
Segment Information (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011
Schedule of Segment Reporting Information, by Segment
Revenue	$ 10,611	$ 8,716
Income before taxes	1,721	1,238
Oilfield Services [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	9,918	8,122
Income before taxes	1,943	1,455
Reservoir Characterization [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	2,586	2,193
Income before taxes	672	460
Drilling [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	3,785	3,112
Income before taxes	657	465
Reservoir Production [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	3,539	2,808
Income before taxes	621	531
Eliminations and other [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	8	9
Income before taxes	(7)	(1)
Eliminations [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	(20)	(7)
Distribution Net of Eliminations [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	693	594
Income before taxes	35	22
Distribution [Member]
Schedule of Segment Reporting Information, by Segment
Revenue	713	601
Income before taxes	35	22
Corporate & other [Member]
Schedule of Segment Reporting Information, by Segment
Income before taxes	(172)	(143)
Interest income [Member]
Schedule of Segment Reporting Information, by Segment
Income before taxes	10	9
Interest expense [Member]
Schedule of Segment Reporting Information, by Segment
Income before taxes	(80)	(71)
Charges & credits [Member]
Schedule of Segment Reporting Information, by Segment
Income before taxes	$ (15)	$ (34)

Segment Information (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Information (Textual) [Abstract]
Interest income included in the segment results	$ 0	$ 0
Interest expense included in the segment results	$ 80	$ 73

Pension and Other Postretirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
US [Member]
Net Pension Cost for the Schlumberger Pension Plans
Service cost-benefits earned during the period	$ 17	$ 16
Interest cost on projected benefit obligation	38	38
Expected return on plan assets	(46)	(43)
Amortization of prior service cost	3	3
Amortization of net loss	23	22
Total pension cost	35	36
International [Member]
Net Pension Cost for the Schlumberger Pension Plans
Service cost-benefits earned during the period	21	17
Interest cost on projected benefit obligation	58	56
Expected return on plan assets	(80)	(70)
Amortization of prior service cost	30	31
Amortization of net loss	15	8
Total pension cost	$ 44	$ 42

- 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
	Mar. 31, 2012	Mar. 31, 2011
Net periodic benefit cost for the Schlumberger US postretirement medical plan
Service cost-benefits earned during the period	$ 7	$ 7
Interest cost on accumulated postretirement benefit obligation	15	14
Expected return on plan assets	(7)	(5)
Amortization of prior service cost	(2)	(3)
Amortization of net loss	5	3
Total pension cost	$ 18	$ 16

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

Subsequent Event (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
Subsequent Event (Details) - USD ($) $ in Millions	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Apr. 10, 2012
Subsequent Events (Textual)
Revenue generated by Wilson distribution business	$ 10,611	$ 8,716
Wilson Distribution Business [Member]
Subsequent Events (Textual)
Divestiture of Wilson distribution business				$ 800
Revenue generated by Wilson distribution business			$ 2,100