View Filing Data

1,267

1,287

Net income attributable to noncontrolling interests

1,267

1,306

Net income attributable to Schlumberger

1,259

1,301

Schlumberger amounts attributable to:

1,259

1,282

Net income attributable to Schlumberger

$ 1,259

$ 1,301

Basic earnings per share of Schlumberger:

$ 0.95

$ 0.96

0.01

Diluted earnings per share of Schlumberger:

^[1]

0.95

0.98

0.94

0.95

0.01

Cash flows from operating activities:

^[1]

$ 0.94

$ 0.97

Average shares outstanding:

Basic

1,330

1,334

Assuming dilution

1,340

1,344

[1]	Amounts may not add due to rounding.

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income	$ 1,267	$ 1,306
Currency translation adjustments
Unrealized net change arising during the period	(77)	110
Marketable securities
Unrealized gain arising during the period	72
Derivatives
Net derivatives (loss) gain on hedge transactions	(154)	155
Reclassification to net income of net realized loss (gain) (see Note 10)	80	(110)
Actuarial loss
Actuarial loss arising during the period		(27)
Amortization to net income of net actuarial loss ( see Note 14 )	74	43
Prior service cost
Amortization to net income of net prior service cost (see Note 14)	31	31
Income taxes on pension and other postretirement benefit plans	(14)	(10)
Comprehensive income	1,279	1,498
Comprehensive income attributable to noncontrolling interests	8	5
Comprehensive income attributable to Schlumberger	$ 1,271	$ 1,493

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Current Assets
Cash	$ 2,129	$ 1,905
Short-term investments	3,432	4,369
Receivables less allowance for doubtful accounts (2013 - $207; 2012 - $202)	11,502	11,351
Inventories	4,973	4,785
Deferred taxes	306	343
Other current assets	1,385	1,403
Current assets total	23,727	24,156
Fixed Income Investments, held to maturity	266	245
Investments in Affiliated Companies	1,620	1,502
Fixed Assets less accumulated depreciation	14,805	14,780
Multiclient Seismic Data	582	518
Goodwill	14,580	14,585
Intangible Assets	4,734	4,802
Other Assets	1,114	959
Total Assets	61,428	61,547
Current Liabilities
Accounts payable and accrued liabilities	7,842	8,453
Estimated liability for taxes on income	1,548	1,426
Long-term debt - current portion	1,996	1,163
Short-term borrowings	966	958
Dividends payable	419	368
Current Liabilities Total	12,771	12,368
Long-term Debt	8,138	9,509
Postretirement Benefits	2,056	2,169
Deferred Taxes	1,506	1,493
Other Liabilities	1,176	1,150
Total Liabilities	25,647	26,689
Equity
Common stock	11,946	11,912
Treasury stock	(6,139)	(6,160)
Retained earnings	33,729	32,887
Accumulated other comprehensive loss	(3,876)	(3,888)
Schlumberger stockholders' equity	35,660	34,751
Noncontrolling interests	121	107
Total equity	35,781	34,858
Liabilities and stockholders equity	$ 61,428	$ 61,547

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts on receivable	$ 207	$ 202

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

3 Months Ended

Mar. 31, 2013

Mar. 31, 2012

Less: Income from discontinued operations

$ 1,267

$ 1,306

(19)

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

Depreciation and amortization

^[1]

896

851

Earnings of companies carried at equity, less dividends received

(23)

(37)

Deferred income taxes

(16)

Stock-based compensation expense

Pension and other postretirement benefits expense

128

Pension and other postretirement benefits funding

(177)

(54)

Change in assets and liabilities:

Increase in receivables

^[2]

(344)

(835)

Increase in inventories

^[2]

(199)

(387)

Increase in other current assets

^[2]

(31)

(128)

Decrease in accounts payable and accrued liabilities

^[2]

(593)

(254)

Increase in liability for taxes on income

^[2]

127

155

Decrease in other liabilities

^[2]

(5)

(16)

Other

^[2]

(35)

NET CASH PROVIDED BY OPERATING ACTIVITIES

1,119

758

Cash flows from investing activities:

Capital expenditures

(894)

(960)

Multiclient seismic data capitalized

(117)

(101)

Business acquisitions, net of cash acquired

(39)

Sale of investments, net

910

362

Other

(45)

NET CASH USED IN INVESTING ACTIVITIES

(106)

(744)

Cash flows from financing activities:

Dividends paid

(365)

(334)

Proceeds from employee stock purchase plan

126

115

Proceeds from exercise of stock options

Stock repurchase program

(193)

(324)

Proceeds from issuance of long-term debt

Repayment of long-term debt

(445)

(40)

Net increase in short-term borrowings

NET CASH USED IN FINANCING ACTIVITIES

(785)

(356)

Cash flows from discontinued operations-operating activities

(25)

Cash flows from discontinued operations-investing activities

(2)

Cash flows from discontinued operations

(27)

Net increase (decrease) in cash before translation effect

228

(369)

Translation effect on cash

(4)

Cash, beginning of period

1,905

1,705

Cash, end of period

$ 2,129

$ 1,346

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

CONSOLIDATED STATEMENT OF EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock Issued [Member]	Common Stock In Treasury [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
Balance, at Dec. 31, 2011	$ 31,392	$ 11,639	$ (5,679)	$ 28,860	$ (3,557)	$ 129
Net income	1,310			1,301		9
Currency translation adjustments	110				110
Changes in fair value of derivatives	45				45
Pension and other postretirement benefit plans	37				37
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	(367)			(367)
Other	3					3
Balance, at Mar. 31, 2012	32,488	11,685	(5,767)	29,794	(3,365)	141
Balance, at Dec. 31, 2012	$ 34,858	$ 11,912	$ (6,160)	32,887	(3,888)	107
Balance, shares at Dec. 31, 2012	1,328	1,434	(106)
Net income	$ 1,267			1,259		8
Shares sold to optionees, less shares exchanged	1		1
Currency translation adjustments	$ (77)				(77)
Changes in unrealized gain on marketable securities	72				72
Changes in fair value of derivatives	(74)				(74)
Pension and other postretirement benefit plans	91				91
Shares sold to optionees, less shares exchanged	40	$ (11)	$ 51
Vesting of restricted stock		(42)	42
Shares issued under employee stock purchase plan	$ 126	$ 5	$ 121
Vesting of restricted stock	1		1
Shares issued under employee stock purchase plan	2		2
Stock repurchase program	(3)		(3)
Balance, shares at Mar. 31, 2013	1,329	1,434	(105)
Stock repurchase program	$ (193)		$ (193)
Stock-based compensation expense	81	$ 81
Dividends declared	(417)			(417)
Other	7	1				6
Balance, at Mar. 31, 2013	$ 35,781	$ 11,946	$ (6,139)	$ 33,729	$ (3,876)	$ 121

CONSOLIDATED STATEMENT OF EQUITY (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Retained Earnings [Member]
Dividends declared, per share	$ 0.3125	$ 0.275

Basis of Presentation

3 Months Ended

Mar. 31, 2013

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, 2013 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2013. The December 31, 2012 balance sheet information has been derived from the Schlumberger 2012 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, 2012, filed with the Securities and Exchange Commission on January 31, 2013.

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

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Charges and Credits

3 Months Ended

Mar. 31, 2013

Charges and Credits

2. Charges and Credits

Schlumberger recorded the following charges and credits during the first three months of 2013 and 2012:

2013

Although the functional currency of Schlumberger’s operations in Venezuela is the US dollar, a portion of the transactions are denominated in local currency. In February 2013, Venezuela’s currency was devalued from the prior exchange rate of 4.3 Bolivar Fuertes per US dollar to 6.3 Bolivar Fuertes per US dollar. As a result of this devaluation, Schlumberger recorded a pretax and after-tax foreign currency loss of $92 million during the first quarter of 2013. This amount is classified in Restructuring & other in the Consolidated Statement of Income.

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. This amount is classified in Merger & integration in the Consolidated Statement of Income.

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.

Earnings Per Share

3 Months Ended

Mar. 31, 2013

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)
	2013						2012
	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	$	1,259		1,330	$	0.95	$	1,282		1,334	$	0.96

Assumed exercise of stock options		—		6				—		7
Unvested restricted stock		—		4				—		3

Diluted	$	1,259		1,340	$	0.94	$	1,282		1,344	$	0.95

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, was as follows:


	(Stated in millions)
	2013		2012
First Quarter		13		14

Inventories

3 Months Ended

Mar. 31, 2013

Inventories

4. Inventories

A summary of inventories follows:


			(Stated in millions)
	Mar. 31, 2013		Dec. 31, 2012
Raw materials & field materials	$	2,648	$	2,519
Work in process		383		349
Finished goods		1,942		1,917

	$	4,973	$	4,785

Fixed Assets

3 Months Ended

Mar. 31, 2013

Fixed Assets

5. Fixed Assets

A summary of fixed assets follows:


			(Stated in millions)
	Mar. 31, 2013		Dec. 31, 2012
Property, plant & equipment	$	33,689	$	33,168
Less: Accumulated depreciation		18,884		18,388

	$	14,805	$	14,780

Depreciation expense relating to fixed assets was $761 million and $699 million in the first quarter of 2013 and 2012, respectively.

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.

Derivative Instruments and Hedging Activities

Multiclient Seismic Data

3 Months Ended

Mar. 31, 2013

Multiclient Seismic Data

6. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the three months ended March 31, 2013 was as follows:


	(Stated in millions)
Balance at December 31, 2012	$	518
Capitalized in period		117
Charged to expense		(53	)

Balance at March 31, 2013	$	582

Goodwill

3 Months Ended

Mar. 31, 2013

Goodwill

7. Goodwill

The changes in the carrying amount of goodwill by reporting unit for the three months ended March 31, 2013 were as follows:


									(Stated in millions)
	Reservoir Characterization			Drilling		Production			Total
Balance at December 31, 2012	$	3,760		$	8,337	$	2,488		$	14,585
Impact of changes in exchange rates and other		(6	)		2		(1	)		(5	)

Balance at March 31, 2013	$	3,754		$	8,339	$	2,487		$	14,580

Intangible Assets

3 Months Ended

Mar. 31, 2013

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, 2013						Dec. 31, 2012
	Gross Book Value		Accumulated Amortization		Net Book Value		Gross Book Value		Accumulated Amortization		Net Book Value
Technology/Technical Know-How	$	1,966	$	509	$	1,457	$	1,967	$	474	$	1,493
Tradenames		1,647		205		1,442		1,647		188		1,459
Customer Relationships		2,115		338		1,777		2,115		312		1,803
Other		383		325		58		369		322		47

	$	6,111	$	1,377	$	4,734	$	6,098	$	1,296	$	4,802

Amortization expense was $82 million during the first quarter of 2013 and $80 million during the same period of 2012.

The weighted average amortization period for all intangible assets is approximately 20 years.

Based on the net book value of intangible assets at March 31, 2013, amortization charged to income for the subsequent five years is estimated to be: remainder of 2013—$246 million; 2014—$323 million; 2015—$312 million; 2016—$299 million; 2017—$288 million; and 2018—$280 million.

Long-term Debt

3 Months Ended

Mar. 31, 2013

Long-term Debt

9. Long-term Debt

A summary of Long-term Debt follows:


			(Stated in millions)
	Mar. 31, 2013		Dec. 31, 2012
3.30% Senior Notes due 2021	$	1,596	$	1,595
4.50% Guaranteed Notes due 2014		—		1,324
2.75% Guaranteed Notes due 2015		1,281		1,318
1.95% Senior Notes due 2016		1,099		1,099
4.20% Senior Notes due 2021		1,099		1,099
1.25% Senior Notes due 2017		999		999
2.40% Senior Notes due 2022		998		998
2.65% Senior Notes due 2016		500		500
Floating Rate Senior Notes due 2014		300		300
Other variable rate debt		266		277

	$	8,138	$	9,509

The estimated fair value of Schlumberger’s Long-term Debt at March 31, 2013 and December 31, 2012, based on quoted market prices, was $8.5 billion and $9.9 billion, respectively.

Derivative Instruments and Hedging Activities

3 Months Ended

Mar. 31, 2013

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 more than 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. In addition, Schlumberger is also exposed to risks on future cash flows relating to certain of its long-term debt which is denominated in currencies 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, 2013, Schlumberger recognized a cumulative net $44 million loss in Equity relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges, the majority of which is expected to be reclassified into earnings within the next 12 months.

Schlumberger is also exposed to changes in the fair value of assets and liabilities 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, 2013, contracts were outstanding for the US dollar equivalent of $7.2 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 fuel. Schlumberger utilizes option contracts to manage a small percentage of the price risk associated with forecasted fuel 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 option contracts are recorded directly to earnings.

The notional amount of outstanding option commodity contracts was $7 million at March 31, 2013.

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.

At March 31, 2013, Schlumberger had fixed rate debt aggregating $9.5 billion and variable rate debt aggregating $1.6 billion.

Short-term investments and Fixed income investments, held to maturity, totaled $3.7 billion at March 31, 2013, 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, 2013		Dec. 31, 2012
Derivative Assets
Derivatives designated as hedges:
Foreign exchange contracts	$	4	$	26	Other current assets
Foreign exchange contracts		3		22	Other Assets
Interest rate swaps		—		2	Other Assets

	$	7	$	50

Derivatives not designated as hedges:
Foreign exchange contracts	$	4	$	10	Other current assets
Foreign exchange contracts		6		6	Other Assets

	$	10	$	16

	$	17	$	66

Derivative Liabilities
Derivatives designated as hedges:
Foreign exchange contracts	$	147	$	80	Accounts payable and accrued liabilities
Foreign exchange contracts		66		19	Other Liabilities

	$	213	$	99

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

	$	218	$	102

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


	(Stated in millions)
	Gain (Loss) Recognized in Income
	First Quarter						Consolidated Statement of Income Classification
	2013			2012			Consolidated Statement of Income Classification
Derivatives designated as fair value hedges:
Interest rate swaps	$	(1	)	$	1		Interest expense

Derivatives not designated as hedges:
Foreign exchange contracts	$	(22	)	$	(27	)	Cost of revenue
Commodity contracts		—			2		Cost of revenue

	$	(22	)	$	(25	)

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


	(Stated in millions)
	Gain (Loss) Reclassified from AOCL into Income
	First Quarter						*Consolidated Statement* *of Income Classification*
	2013			2012			*Consolidated Statement* *of Income Classification*
Foreign exchange contracts	$	(80	)	$	112		Cost of revenue
Foreign exchange contracts		—			(2	)	Research & engineering

	$	(80	)	$	110


	(Stated in millions)
	Gain (Loss) Recognized in AOCL
	First Quarter
	2013			2012
Foreign exchange contracts	$	(154	)	$	155

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.

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-Publisher FASB
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Income Tax

3 Months Ended

Mar. 31, 2013

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
	2013		2012
United States	$	421	$	571
Outside United States		1,258		1,116

	$	1,679	$	1,687

Schlumberger recorded pretax charges of $92 million outside of the US during the first quarter of 2013 and pretax charges of $15 million during the first quarter of 2012 ($11 million in the US and $4 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, 2013			Dec. 31, 2012
Postretirement benefits, net	$	518		$	543
Intangible assets		(1,489	)		(1,490	)
Investments in non-US subsidiaries		(317	)		(317	)
Other, net		88			114

	$	(1,200	)	$	(1,150	)

The above deferred tax balances at March 31, 2013 and December 31, 2012 were net of valuation allowances relating to net operating losses in certain countries of $251 million and $256 million, respectively.

The components of consolidated Taxes on income were as follows:


	(Stated in millions)
	First Quarter
	2013		2012
Current:
United States—Federal	$	116	$	190
United States—State		15		17
Outside United States		254		209

	$	385	$	416

Deferred:
United States—Federal	$	18	$	(32	)
United States—State		—		(3	)
Outside United States		9		19

	$	27	$	(16	)

	$	412	$	400

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


	First Quarter
	2013			2012
US federal statutory rate		35	%		35	%
US state income taxes		1			1
Non-US income taxed at different rates		(12	)		(10	)
Charges (See Note 2)		1			—
Other		—			(2	)

		25	%		24	%

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.

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-Article 4

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Contingencies

3 Months Ended

Mar. 31, 2013

Contingencies

12. Contingencies

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. Governmental agencies and authorities have a broad range of civil and criminal penalties that they may seek to impose for violations of trade and economic sanction laws including, but not limited to, disgorgement, fines, penalties and modifications to business practices. In recent years, these agencies and authorities have obtained a wide range of penalties in settlements with companies arising from trade and economic sanction investigations, including in some cases fines and other penalties in the tens and hundreds of millions of dollars. Schlumberger is cooperating with the governmental authorities and cannot currently predict the outcome or estimate the possible impact of the ultimate resolution of these matters.

On April 20, 2010, a fire and explosion occurred onboard the semisubmersible drilling rig Deepwater Horizon, owned by Transocean Ltd. and under contract to a subsidiary of BP plc. Pursuant to a contract between M-I SWACO and BP, M-I SWACO provided certain services under the direction of BP. A number of legal actions, certain of which named an M-I SWACO entity as a defendant, were filed in connection with the Deepwater Horizon incident. Many of these claims were consolidated into multidistrict litigation pending in federal court (the “MDL”). During the first quarter of 2013, the federal court entered its order dismissing all claims against M-I SWACO that were consolidated as part of the MDL.

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.

The entire disclosure for commitments and contingencies.

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Segment Information

3 Months Ended

Mar. 31, 2013

Segment Information

13. Segment Information


	(Stated in millions)
	First Quarter 2013						First Quarter 2012
	Revenue			Income before taxes			Revenue		Income before taxes
Oilfield Services
Reservoir Characterization	$	2,803		$	758		$	2,582	$	674
Drilling		4,132			741			3,785		657
Production		3,785			573			3,542		620
Eliminations & other		(52	)		(46	)		9		(8	)

		10,668			2,026			9,918		1,943
Corporate & other		—			(168	)		—		(171	)
Interest income		—			6			—		10
Interest expense ⁽¹⁾		—			(93	)		—		(80	)
Charges and credits (see Note 2)		—			(92	)		—		(15	)

	$	10,668		$	1,679		$	9,918	$	1,687

Certain prior period amounts have been reclassified to conform to the current year presentation.

⁽¹⁾	Excludes interest expense included in the segment results ($5 million in 2013; $- million in 2012).

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.

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Pension and Other Postretirement Benefits

Pension and Other Postretirement Benefits

3 Months Ended

Mar. 31, 2013

14. Pension and Other Postretirement Benefits

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


	(Stated in millions)
		First Quarter
		2013						2012
		US			Int’l			US			Int’l
Service cost—benefits earned during period	$	21		$	34		$	17		$	21
Interest cost on projected benefit obligation		37			64			38			58
Expected return on plan assets		(51	)		(100	)		(46	)		(80	)
Amortization of prior service cost		3			29			3			30
Amortization of net loss		30			37			23			15

	$	40		$	64		$	35		$	44

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


	(Stated in millions)
		First Quarter
		2013			2012
Service cost—benefits earned during period	$	12		$	7
Interest cost on accumulated postretirement benefit obligation		15			15
Expected return on plan assets		(9	)		(7	)
Amortization of prior service cost		(1	)		(2	)
Amortization of net loss		7			5

	$	24		$	18

The entire disclosure for pension and other postretirement benefits.

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

Reference 10: 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 11: http://www.xbrl.org/2003/role/presentationRef
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-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 12: 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 13: 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 14: 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.

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2013

15. Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss consists of the following:


	(Stated in millions)
	Currency Translation Adjustments			Fair Value of Derivatives			Pension and Other Postretirement Benefit Plans			Unrealized Gains Marketable Securities		Total
Balance, January 1, 2013	$	(918	)	$	30		$	(3,141	)	$	141	$	(3,888	)
Other comprehensive income (loss) before reclassifications		(77	)		(154	)		—			72		(159	)
Amounts reclassified from accumulated other comprehensive loss		—			80			105			—		185
Income taxes		—			—			(14	)		—		(14	)

Net other comprehensive income (loss)		(77	)		(74	)		91			72		12

Balance, March 31, 2013	$	(995	)	$	(44	)	$	(3,050	)	$	213	$	(3,876	)


	(Stated in millions)
	Currency Translation Adjustments			Fair Value of Derivatives			Pension and Other Postretirement Benefit Plans			Unrealized Gains Marketable Securities		Total
Balance, January 1, 2012	$	(993	)	$	(26	)	$	(2,538	)	$	—	$	(3,557	)
Other comprehensive income (loss) before reclassifications		110			155			(27	)		—		238
Amounts reclassified from accumulated other comprehensive loss		—			(110	)		74			—		(36	)
Income taxes		—			—			(10	)		—		(10	)

Net other comprehensive income (loss)		110			45			37			—		192

Balance, March 31, 2012	$	(883	)	$	19		$	(2,501	)	$	—	$	(3,365	)

The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 15
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-Name Accounting Standards Codification
-Topic 505
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-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Reclassification Adjustments
-URI http://asc.fasb.org/extlink&oid=6522872

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-Name Accounting Standards Codification
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Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 14-26
-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.

Discontinued Operations

3 Months Ended

Mar. 31, 2013

Discontinued Operations

16. Discontinued Operations

During the second quarter of 2012, Schlumberger sold its Wilson distribution business to National Oilwell Varco Inc. (“NOV”) for $906 million in cash.

During July 2012, Schlumberger completed the sale of its 56% interest in CE Franklin Ltd. to NOV for $122 million in cash.

As Wilson and CE Franklin comprised Schlumberger’s entire Distribution segment, the results of this segment were classified as discontinued operations in the Consolidated Statement of Income.

The following table summarizes the results of these discontinued operations (in millions):


	First Quarter 2012
Revenue	$	693

Income before taxes	$	34
Tax expense		(11	)
Net income attributable to noncontrolling interests		(4	)

Income from discontinued operations	$	19

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43-48
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reconciliation of Earnings Per Share

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

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)
	2013						2012
	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	$	1,259		1,330	$	0.95	$	1,282		1,334	$	0.96

Assumed exercise of stock options		—		6				—		7
Unvested restricted stock		—		4				—		3

Diluted	$	1,259		1,340	$	0.94	$	1,282		1,344	$	0.95

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share


	(Stated in millions)
	2013		2012
First Quarter		13		14

Inventories (Tables)

3 Months Ended

Mar. 31, 2013

Inventory Disclosure

A summary of inventories follows:


			(Stated in millions)
	Mar. 31, 2013		Dec. 31, 2012
Raw materials & field materials	$	2,648	$	2,519
Work in process		383		349
Finished goods		1,942		1,917

	$	4,973	$	4,785

Fixed Assets (Tables)

3 Months Ended

Mar. 31, 2013

Property, Plant and Equipment

A summary of fixed assets follows:


			(Stated in millions)
	Mar. 31, 2013		Dec. 31, 2012
Property, plant & equipment	$	33,689	$	33,168
Less: Accumulated depreciation		18,884		18,388

	$	14,805	$	14,780

Multiclient Seismic Data (Tables)

3 Months Ended

Mar. 31, 2013

Multiclient Seismic Data Table

The change in the carrying amount of multiclient seismic data for the three months ended March 31, 2013 was as follows:


	(Stated in millions)
Balance at December 31, 2012	$	518
Capitalized in period		117
Charged to expense		(53	)

Balance at March 31, 2013	$	582

Goodwill (Tables)

3 Months Ended

Mar. 31, 2013

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill by reporting unit for the three months ended March 31, 2013 were as follows:


									(Stated in millions)
	Reservoir Characterization			Drilling		Production			Total
Balance at December 31, 2012	$	3,760		$	8,337	$	2,488		$	14,585
Impact of changes in exchange rates and other		(6	)		2		(1	)		(5	)

Balance at March 31, 2013	$	3,754		$	8,339	$	2,487		$	14,580

Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Intangible Assets by Major Class

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


											(Stated in millions)
	Mar. 31, 2013						Dec. 31, 2012
	Gross Book Value		Accumulated Amortization		Net Book Value		Gross Book Value		Accumulated Amortization		Net Book Value
Technology/Technical Know-How	$	1,966	$	509	$	1,457	$	1,967	$	474	$	1,493
Tradenames		1,647		205		1,442		1,647		188		1,459
Customer Relationships		2,115		338		1,777		2,115		312		1,803
Other		383		325		58		369		322		47

	$	6,111	$	1,377	$	4,734	$	6,098	$	1,296	$	4,802

Long-term Debt (Tables)

3 Months Ended

Mar. 31, 2013

Long-term Debt

A summary of Long-term Debt follows:


			(Stated in millions)
	Mar. 31, 2013		Dec. 31, 2012
3.30% Senior Notes due 2021	$	1,596	$	1,595
4.50% Guaranteed Notes due 2014		—		1,324
2.75% Guaranteed Notes due 2015		1,281		1,318
1.95% Senior Notes due 2016		1,099		1,099
4.20% Senior Notes due 2021		1,099		1,099
1.25% Senior Notes due 2017		999		999
2.40% Senior Notes due 2022		998		998
2.65% Senior Notes due 2016		500		500
Floating Rate Senior Notes due 2014		300		300
Other variable rate debt		266		277

	$	8,138	$	9,509

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.

Reference 1: 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

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-Name Accounting Standards Codification
-Topic 235
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

Fair Values of Outstanding Derivative Instruments

Derivative Instruments and Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2013

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


	(Stated in millions)
	Fair Value of Derivatives				*Consolidated Balance Sheet* Classification
	Mar. 31, 2013		Dec. 31, 2012
Derivative Assets
Derivatives designated as hedges:
Foreign exchange contracts	$	4	$	26	Other current assets
Foreign exchange contracts		3		22	Other Assets
Interest rate swaps		—		2	Other Assets

	$	7	$	50

Derivatives not designated as hedges:
Foreign exchange contracts	$	4	$	10	Other current assets
Foreign exchange contracts		6		6	Other Assets

	$	10	$	16

	$	17	$	66

Derivative Liabilities
Derivatives designated as hedges:
Foreign exchange contracts	$	147	$	80	Accounts payable and accrued liabilities
Foreign exchange contracts		66		19	Other Liabilities

	$	213	$	99

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

	$	218	$	102

Effect of Derivative Instruments Designated as Fair Value Hedges and Not Designated as Hedges on Consolidated Statement of Income

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


	(Stated in millions)
	Gain (Loss) Recognized in Income
	First Quarter						Consolidated Statement of Income Classification
	2013			2012			Consolidated Statement of Income Classification
Derivatives designated as fair value hedges:
Interest rate swaps	$	(1	)	$	1		Interest expense

Derivatives not designated as hedges:
Foreign exchange contracts	$	(22	)	$	(27	)	Cost of revenue
Commodity contracts		—			2		Cost of revenue

	$	(22	)	$	(25	)

Effect of Derivative Instruments in Cash Flow Hedging Relationships on Income and Accumulated Other Comprehensive Loss (AOCL)

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


	(Stated in millions)
	Gain (Loss) Reclassified from AOCL into Income
	First Quarter						*Consolidated Statement* *of Income Classification*
	2013			2012			*Consolidated Statement* *of Income Classification*
Foreign exchange contracts	$	(80	)	$	112		Cost of revenue
Foreign exchange contracts		—			(2	)	Research & engineering

	$	(80	)	$	110


	(Stated in millions)
	Gain (Loss) Recognized in AOCL
	First Quarter
	2013			2012
Foreign exchange contracts	$	(154	)	$	155

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.

Income Tax Disclosure Table

Income Tax (Tables)

3 Months Ended

Mar. 31, 2013

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


	(Stated in millions)
	First Quarter
	2013		2012
United States	$	421	$	571
Outside United States		1,258		1,116

	$	1,679	$	1,687

Components of Net Deferred Tax Assets

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


	(Stated in millions)
	Mar. 31, 2013			Dec. 31, 2012
Postretirement benefits, net	$	518		$	543
Intangible assets		(1,489	)		(1,490	)
Investments in non-US subsidiaries		(317	)		(317	)
Other, net		88			114

	$	(1,200	)	$	(1,150	)

Components of Consolidated Income Taxes

The components of consolidated Taxes on income were as follows:


	(Stated in millions)
	First Quarter
	2013		2012
Current:
United States—Federal	$	116	$	190
United States—State		15		17
Outside United States		254		209

	$	385	$	416

Deferred:
United States—Federal	$	18	$	(32	)
United States—State		—		(3	)
Outside United States		9		19

	$	27	$	(16	)

	$	412	$	400

Reconciliation of US Statutory Federal Tax Rate

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


	First Quarter
	2013			2012
US federal statutory rate		35	%		35	%
US state income taxes		1			1
Non-US income taxed at different rates		(12	)		(10	)
Charges (See Note 2)		1			—
Other		—			(2	)

		25	%		24	%

Segment Information (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of Segment Reporting Information, by Segment


	(Stated in millions)
	First Quarter 2013						First Quarter 2012
	Revenue			Income before taxes			Revenue		Income before taxes
Oilfield Services
Reservoir Characterization	$	2,803		$	758		$	2,582	$	674
Drilling		4,132			741			3,785		657
Production		3,785			573			3,542		620
Eliminations & other		(52	)		(46	)		9		(8	)

		10,668			2,026			9,918		1,943
Corporate & other		—			(168	)		—		(171	)
Interest income		—			6			—		10
Interest expense ⁽¹⁾		—			(93	)		—		(80	)
Charges and credits (see Note 2)		—			(92	)		—		(15	)

	$	10,668		$	1,679		$	9,918	$	1,687

Certain prior period amounts have been reclassified to conform to the current year presentation.

⁽¹⁾	Excludes interest expense included in the segment results ($5 million in 2013; $- million in 2012).

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.

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

Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2013

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


	(Stated in millions)
		First Quarter
		2013						2012
		US			Int’l			US			Int’l
Service cost—benefits earned during period	$	21		$	34		$	17		$	21
Interest cost on projected benefit obligation		37			64			38			58
Expected return on plan assets		(51	)		(100	)		(46	)		(80	)
Amortization of prior service cost		3			29			3			30
Amortization of net loss		30			37			23			15

	$	40		$	64		$	35		$	44

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


	(Stated in millions)
		First Quarter
		2013			2012
Service cost—benefits earned during period	$	12		$	7
Interest cost on accumulated postretirement benefit obligation		15			15
Expected return on plan assets		(9	)		(7	)
Amortization of prior service cost		(1	)		(2	)
Amortization of net loss		7			5

	$	24		$	18

Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2013

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss consists of the following:


	(Stated in millions)
	Currency Translation Adjustments			Fair Value of Derivatives			Pension and Other Postretirement Benefit Plans			Unrealized Gains Marketable Securities		Total
Balance, January 1, 2013	$	(918	)	$	30		$	(3,141	)	$	141	$	(3,888	)
Other comprehensive income (loss) before reclassifications		(77	)		(154	)		—			72		(159	)
Amounts reclassified from accumulated other comprehensive loss		—			80			105			—		185
Income taxes		—			—			(14	)		—		(14	)

Net other comprehensive income (loss)		(77	)		(74	)		91			72		12

Balance, March 31, 2013	$	(995	)	$	(44	)	$	(3,050	)	$	213	$	(3,876	)


	(Stated in millions)
	Currency Translation Adjustments			Fair Value of Derivatives			Pension and Other Postretirement Benefit Plans			Unrealized Gains Marketable Securities		Total
Balance, January 1, 2012	$	(993	)	$	(26	)	$	(2,538	)	$	—	$	(3,557	)
Other comprehensive income (loss) before reclassifications		110			155			(27	)		—		238
Amounts reclassified from accumulated other comprehensive loss		—			(110	)		74			—		(36	)
Income taxes		—			—			(10	)		—		(10	)

Net other comprehensive income (loss)		110			45			37			—		192

Balance, March 31, 2012	$	(883	)	$	19		$	(2,501	)	$	—	$	(3,365	)

Discontinued Operations (Tables)

3 Months Ended

Mar. 31, 2013

Discontinued Operations

The following table summarizes the results of these discontinued operations (in millions):


	First Quarter 2012
Revenue	$	693

Income before taxes	$	34
Tax expense		(11	)
Net income attributable to noncontrolling interests		(4	)

Income from discontinued operations	$	19

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

Charges and Credits - Additional Information (Detail) $ in Millions	1 Months Ended	3 Months Ended
	Aug. 27, 2010 USD ($)	Mar. 31, 2013 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]
Pretax merger and integration related charges			$ 15
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Currency loss before tax		$ 92
Currency loss after tax		$ 92
Merger-related transaction costs [Member]
Restructuring Cost and Reserve [Line Items]
Pretax merger and integration related charges	$ 15
After tax merger and integration related charges	$ 13
Venezuela Bolivar Official Currency Exchange Rate to Dollar [Member]
Restructuring Cost and Reserve [Line Items]
Exchange rate		6.3		4.3

Earning Per Share - Reconciliation of Earning Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Earnings per Share from Continuing Operations
Basic	$ 0.95	$ 0.96
Diluted	$ 0.94	$ 0.95
Average Shares Outstanding
Basic	1,330	1,334
Assumed exercise of stock options	6	7
Unvested restricted stock	4	3
Diluted	1,340	1,344
Schlumberger Income from Continuing Operations
Basic	$ 1,259	$ 1,282
Assumed exercise of stock options
Unvested restricted stock
Diluted	$ 1,259	$ 1,282

Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares shares in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Outstanding Stock Awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Employee stock options to purchase	13	14

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Antidilution
-URI http://asc.fasb.org/extlink&oid=6505113

Reference 2: 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 3: 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 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 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 6: 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 7: 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.

Reference 8: 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.

Inventories - Inventory Disclosure (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Inventories [Line Items]
Raw materials & field materials	$ 2,648	$ 2,519
Work in process	383	349
Finished goods	1,942	1,917
Inventories	$ 4,973	$ 4,785

Fixed Assets - Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant & equipment	$ 33,689	$ 33,168
Less: Accumulated depreciation	18,884	18,388
Fixed assets less accumulated depreciation	$ 14,805	$ 14,780

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.

Fixed Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Depreciation and Amortization Expenses For Property Plant And Equipment [Line Items]
Depreciation expense relating to fixed assets	$ 761	$ 699

Multiclient Seismic Data - Multiclient Seismic Data Table (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($)
Opening Balance	$ 518
Capitalized in period	117
Charged to expense	(53)
Ending Balance	$ 582

Goodwill - Changes in Carrying Amount of Goodwill (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 14,585
Impact of changes in exchange rates and other	(5)
Goodwill, Ending Balance	14,580
Reservoir Characterization [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	3,760
Impact of changes in exchange rates and other	(6)
Goodwill, Ending Balance	3,754
Drilling [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	8,337
Impact of changes in exchange rates and other	2
Goodwill, Ending Balance	8,339
Production [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	2,488
Impact of changes in exchange rates and other	(1)
Goodwill, Ending Balance	$ 2,487

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.

Reference 1: 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=14024403&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
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-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: 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 4: 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 5: 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 6: 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 7: 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 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.

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.

Reference 1: 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=14024403&loc=d3e13816-109267

Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-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 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-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 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-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.

Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Intangible Assets By Major Class [Line Items]
Gross Book Value	$ 6,111	$ 6,098
Accumulated Amortization	1,377	1,296
Net Book Value	4,734	4,802
Technology/Technical Know-How [Member]
Intangible Assets By Major Class [Line Items]
Gross Book Value	1,966	1,967
Accumulated Amortization	509	474
Net Book Value	1,457	1,493
Tradenames [Member]
Intangible Assets By Major Class [Line Items]
Gross Book Value	1,647	1,647
Accumulated Amortization	205	188
Net Book Value	1,442	1,459
Customer Relationships [Member]
Intangible Assets By Major Class [Line Items]
Gross Book Value	2,115	2,115
Accumulated Amortization	338	312
Net Book Value	1,777	1,803
Other [Member]
Intangible Assets By Major Class [Line Items]
Gross Book Value	383	369
Accumulated Amortization	325	322
Net Book Value	$ 58	$ 47

Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Intangible Assets [Line Items]
Amortization expenses	$ 82	$ 80
Weighted average amortization period for all intangible assets (years)	20 years
Estimated amortization charged to income, 2013	$ 246
Estimated amortization charged to income, 2014	323
Estimated amortization charged to income, 2015	312
Estimated amortization charged to income, 2016	299
Estimated amortization charged to income, 2017	288
Estimated amortization charged to income, 2018	$ 280

Long-term Debt - Long-term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 8,138	$ 9,509
Other variable rate debt [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	266	277
3.30% Senior Notes due 2021 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	1,596	1,595
4.50% Guaranteed Notes due 2014 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount		1,324
2.75% Guaranteed Notes due 2015 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	1,281	1,318
1.95% Senior Notes due 2016 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	1,099	1,099
4.20% Senior Notes due 2021 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	1,099	1,099
1.25% Senior Notes due 2017 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	999	999
2.40% Senior Notes due 2022 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	998	998
2.65% Senior Notes due 2016 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	500	500
Floating Rate Senior Notes due 2014 [Member]
Proforma Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 300	$ 300

Long-term Debt - Long-term Debt (Parenthetical) (Detail)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
3.30% Senior Notes due 2021 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	3.30%	3.30%
Debt instrument maturity date	2021	2021
4.50% Guaranteed Notes due 2014 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate		4.50%
Debt instrument maturity date		2014
2.75% Guaranteed Notes due 2015 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	2.75%	2.75%
Debt instrument maturity date	2015	2015
1.95% Senior Notes due 2016 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	1.95%	1.95%
Debt instrument maturity date	2016	2016
4.20% Senior Notes due 2021 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	4.20%	4.20%
Debt instrument maturity date	2021	2021
1.25% Senior Notes due 2017 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	1.25%	1.25%
Debt instrument maturity date	2017	2017
2.40% Senior Notes due 2022 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	2.40%	2.40%
Debt instrument maturity date	2022	2022
2.65% Senior Notes due 2016 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument interest rate	2.65%	2.65%
Debt instrument maturity date	2016	2016
Floating Rate Senior Notes due 2014 [Member]
Proforma Debt Instrument [Line Items]
Debt instrument maturity date	2014	2014

Long-term Debt - Additional Information (Detail) - USD ($) $ in Billions	Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Long-term debt, fair value	$ 8.5	$ 9.9

Derivative Instruments and Hedging Activities - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2013 USD ($) Country
Derivative [Line Items]
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	$ 44
Contracts outstanding in various foreign currencies (US dollar equivalent)	7,200
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps	9,500
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps	1,600
Short-term investments and Fixed income investments, held to maturity	3,700
Commodity contracts [Member]
Derivative [Line Items]
Commodity forward contract outstanding	7
Debt [Member] \| Derivatives designated as hedges [Member]
Derivative [Line Items]
Contracts outstanding in various foreign currencies (US dollar equivalent)	$ 3,900

Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Derivative Assets
Derivative Assets	$ 17		$ 66
Derivative Liabilities
Derivative Liabilities	218		102
Foreign exchange contracts [Member]
Derivative Assets
Derivative Assets	(80)	$ 110
Derivatives designated as hedges [Member]
Derivative Assets
Derivative Assets	7		50
Derivative Liabilities
Derivative Liabilities	213		99
Derivatives designated as hedges [Member] \| Foreign exchange contracts [Member] \| Other current assets [Member]
Derivative Assets
Derivative Assets	4		26
Derivatives designated as hedges [Member] \| Foreign exchange contracts [Member] \| Other [Member]
Derivative Assets
Derivative Assets	3		22
Derivatives designated as hedges [Member] \| Foreign exchange contracts [Member] \| Accounts payable and accrued liabilities [Member]
Derivative Liabilities
Derivative Liabilities	147		80
Derivatives designated as hedges [Member] \| Foreign exchange contracts [Member] \| Other Liabilities [Member]
Derivative Liabilities
Derivative Liabilities	66		19
Derivatives designated as hedges [Member] \| Interest rate swaps [Member] \| Other [Member]
Derivative Assets
Derivative Assets			2
Derivatives not designated as hedges [Member]
Derivative Assets
Derivative Assets	10		16
Derivatives not designated as hedges [Member] \| Foreign exchange contracts [Member] \| Other current assets [Member]
Derivative Assets
Derivative Assets	4		10
Derivatives not designated as hedges [Member] \| Foreign exchange contracts [Member] \| Other [Member]
Derivative Assets
Derivative Assets	6		6
Derivatives not designated as hedges [Member] \| Foreign exchange contracts [Member] \| Accounts payable and accrued liabilities [Member]
Derivative Liabilities
Derivative Liabilities	$ 5		$ 3

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments Designated as Fair Value Hedges and Not Designated as Hedges on Consolidated Statement of Income (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Derivatives designated as fair value hedges [Member] \| Interest rate swaps [Member] \| Interest expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ (1)	$ 1
Derivatives not designated as hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	(22)	(25)
Derivatives not designated as hedges [Member] \| Foreign exchange contracts [Member] \| Cost of revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income	$ (22)	(27)
Derivatives not designated as hedges [Member] \| Commodity contracts [Member] \| Cost of revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Income		$ 2

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.

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments in Cash Flow Hedging Relationships on Income and Other Comprehensive Loss (OCI) (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCL into Income	$ 17		$ 66
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCL into Income	(80)	$ 110
Foreign exchange contracts [Member] \| Cost of revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCL into Income	$ (80)	112
Foreign exchange contracts [Member] \| Research & engineering [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCL into Income		$ (2)

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments in Cash Flow Hedging Relationships on Income and Accumulated Other Comprehensive Loss (AOCL) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in OCL	$ (154)	$ 155

Income Tax - Income Tax Disclosure Table (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule Of Income Taxes [Line Items]
United States	$ 421	$ 571
Outside United States	1,258	1,116
Income (Loss) from Continuing Operations before Income Taxes and Minority Interest, Total	$ 1,679	$ 1,687

Income Tax - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Income Tax Examination [Line Items]
Charges pretax		$ 15
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	$ 251		$ 256
US statutory federal rate	35.00%	35.00%
Domestic Country [Member]
Income Tax Examination [Line Items]
Charges pretax		$ 11
Foreign Country [Member]
Income Tax Examination [Line Items]
Charges pretax	$ 92	$ 4

Income Tax - Components of Net Deferred Tax Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2013	Dec. 31, 2012
Components Of Deferred Tax Assets And Liabilities [Line Items]
Postretirement benefits, net	$ 518	$ 543
Intangible assets	(1,489)	(1,490)
Investments in non-US subsidiaries	(317)	(317)
Other, net	88	114
Net deferred tax assets	$ (1,200)	$ (1,150)

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.

Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity.

Income Tax - Components of Consolidated Income Taxes (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Current:
United States-Federal	$ 116	$ 190
United States-State	15	17
Outside United States	254	209
Current Income Tax Expense (Benefit), Total	385	416
Deferred:
United States-Federal	18	(32)
United States-State		(3)
Outside United States	9	19
Deferred income taxes	27	(16)
Consolidated taxes on income	$ 412	$ 400

Income Tax - Reconciliation of US Statutory Federal Tax Rate (Detail)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule Of Income Taxes [Line Items]
US federal statutory rate	35.00%	35.00%
US state income taxes	1.00%	1.00%
Non-US income taxed at different rates	(12.00%)	(10.00%)
Charges (See Note 2)	1.00%
Other		(2.00%)
Effective income tax rate	25.00%	24.00%

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Income before taxes	$ 1,679	$ 1,687
Revenue	10,668	9,918
Reservoir Characterization [Member]
Segment Reporting Information [Line Items]
Income before taxes	758	674
Revenue	2,803	2,582
Drilling [Member]
Segment Reporting Information [Line Items]
Income before taxes	741	657
Revenue	4,132	3,785
Production [Member]
Segment Reporting Information [Line Items]
Income before taxes	573	620
Revenue	3,785	3,542
Eliminations & other [Member]
Segment Reporting Information [Line Items]
Income before taxes	(46)	(8)
Revenue	(52)	9
Oilfield Services [Member]
Segment Reporting Information [Line Items]
Income before taxes	2,026	1,943
Revenue	10,668	9,918
Corporate & other [Member]
Segment Reporting Information [Line Items]
Income before taxes	(168)	(171)
Interest income [Member]
Segment Reporting Information [Line Items]
Income before taxes	6	10
Interest expense [Member]
Segment Reporting Information [Line Items]
Income before taxes	(93)	(80)
Charges & credits [Member]
Segment Reporting Information [Line Items]
Income before taxes	$ (92)	$ (15)

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Interest expense included in the segment results	$ 98	$ 80
Interest Expense Excluded From Segment Information [Member]
Segment Reporting Information [Line Items]
Interest expense included in the segment results	$ 5

Pension and Other Postretirement Benefits - Net Pension Cost for Schlumberger Pension Plans and US Postretirement Medical Plan (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
US Plan Assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost-benefits earned during period	$ 21	$ 17
Interest cost on benefit obligation	37	38
Expected return on plan assets	(51)	(46)
Amortization of prior service cost	3	3
Amortization of net loss	30	23
Total pension cost	40	35
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost-benefits earned during period	34	21
Interest cost on benefit obligation	64	58
Expected return on plan assets	(100)	(80)
Amortization of prior service cost	29	30
Amortization of net loss	37	15
Total pension cost	64	44
Postretirement medical plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost-benefits earned during period	12	7
Interest cost on benefit obligation	15	15
Expected return on plan assets	(9)	(7)
Amortization of prior service cost	(1)	(2)
Amortization of net loss	7	5
Total pension cost	$ 24	$ 18

Accumulated Other Comprehensive Loss - Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Loss [Line Items]
Beginning balance, Currency Translation Adjustments	$ (918)	$ (993)
Other comprehensive income (loss) before reclassifications, Currency Translation Adjustments	(77)	110
Amounts reclassified from accumulated other comprehensive loss, Currency Translation Adjustments
Income taxes, Currency Translation Adjustments
Net other comprehensive income (loss), Currency Translation Adjustments	(77)	110
Ending balance, Currency Translation Adjustments	(995)	(883)
Beginning balance, Fair Value of Derivatives	30	(26)
Other comprehensive income (loss) before reclassifications, Fair Value of Derivatives	(154)	155
Amounts reclassified from accumulated other comprehensive loss, Fair Value of Derivatives	80	(110)
Income taxes, Fair Value of Derivatives
Net other comprehensive income (loss), Fair Value of Derivatives	(74)	45
Ending balance, Fair Value of Derivatives	(44)	19
Beginning Balance, Pension and Other Postretirement Benefit Plans	(3,141)	(2,538)
Other comprehensive income (loss) before reclassifications, Pension and Other Postretirement Benefit Plans		(27)
Amounts reclassified from accumulated other comprehensive loss, Pension and Other Postretirement Benefit Plans	105	74
Income taxes, Pension and Other Postretirement Benefit Plans	(14)	(10)
Net other comprehensive income (loss), Pension and Other Postretirement Benefit Plans	91	37
Ending Balance, Pension and Other Postretirement Benefit Plans	(3,050)	(2,501)
Beginning Balance, Unrealized Gains Marketable Securities	141
Other comprehensive income (loss) before reclassifications, Unrealized Gains Marketable Securities	72
Amounts reclassified from accumulated other comprehensive loss, Unrealized Gains Marketable Securities
Income taxes, Unrealized Gains Marketable Securities
Net other comprehensive income (loss), Unrealized Gains Marketable Securities	72
Ending Balance, Unrealized Gains Marketable Securities	213
Beginning Balance	(3,888)	(3,557)
Other comprehensive income (loss) before reclassifications	(159)	238
Amounts reclassified from accumulated other comprehensive loss	185	(36)
Income taxes	(14)	(10)
Net other comprehensive income (loss)	12	192
Ending Balance	$ (3,876)	$ (3,365)

Discontinued Operations - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Jul. 31, 2012	Jun. 30, 2012
Subsequent Event [Line Items]
Percentage of Schlumberger completed the sale of interest in CE Franklin Ltd. to NOV	56.00%
CE Franklin Ltd. [Member]
Subsequent Event [Line Items]
Proceed from sale of business	$ 122
Wilson Distribution Segment [Member]
Subsequent Event [Line Items]
Proceed from sale of business		$ 906

Discontinued Operations - Discontinued Operations (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2012 USD ($)
Acquisitions And Discontinued Operations [Line Items]
Revenue	$ 693
Income before taxes	34
Tax expense	(11)
Net income attributable to noncontrolling interests	(4)
Income from discontinued operations	$ 19

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-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 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 46
-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 144
-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.

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 13
-Article 7

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-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 144
-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 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-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 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 15
-Article 5

This element represents the overall income (loss) from a disposal group that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items, which is apportioned to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This item includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.