Schlumberger Limited (SLB) 10-K 27 Jan 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Trading Symbol	SLB
Entity Registrant Name	SCHLUMBERGER LTD /NV/
Entity Central Index Key	87,347
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,256,367,980
Entity Public Float		$ 109

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenue		$ 35,475	$ 48,580	$ 45,266
Interest & other income		236	291	165
Gain on formation of OneSubsea				1,028
Expenses
Cost of revenue		28,321	37,398	35,331
Research & engineering		1,094	1,217	1,174
General & administrative		494	475	416
Impairments & other		2,575	1,773	456
Interest		346	369	391
Income from continuing operations before taxes		2,881	7,639	8,691
Taxes on income		746	1,928	1,848
Income from continuing operations		2,135	5,711	6,843
Loss from discontinued operations			(205)	(69)
Net income		2,135	5,506	6,774
Net income attributable to noncontrolling interests		63	68	42
Net income attributable to Schlumberger		2,072	5,438	6,732
Schlumberger amounts attributable to:
Income from continuing operations		2,072	5,643	6,801
Loss from discontinued operations			(205)	(69)
Net income attributable to Schlumberger		$ 2,072	$ 5,438	$ 6,732
Basic earnings per share of Schlumberger
Income from continuing operations		$ 1.63	$ 4.36	$ 5.14
Loss from discontinued operations			(0.16)	(0.05)
Net income		1.63	4.20	5.09
Diluted earnings per share of Schlumberger
Income from continuing operations		1.63	4.31	5.10
Loss from discontinued operations			(0.16)	(0.05)
Net income	[1]	$ 1.63	$ 4.16	$ 5.05
Average shares outstanding:
Basic		1,267	1,295	1,323
Assuming dilution		1,275	1,308	1,333
[1]	Amounts may not add due to rounding.

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,135	$ 5,506	$ 6,774
Currency translation adjustments
Unrealized net change arising during the period	(522)	(463)	(151)
Marketable securities
Unrealized (loss) gain arising during the period	(50)	(166)	35
Reclassification to net income - impairment charge	40
Cash flow hedges
Net (loss) gain on cash flow hedges	(178)	(238)	49
Reclassification to net income of net realized gain (loss)	235	113	(50)
Actuarial gain (loss)
Actuarial (loss) gain arising during the period	(210)	(1,285)	1,328
Amortization to net income of net actuarial loss	306	177	300
Prior service cost
Amortization to net income of net prior service cost	101	128	125
Income taxes on pension and other postretirement benefit plans	(74)	82	(302)
Comprehensive income	1,783	3,854	8,108
Comprehensive income attributable to noncontrolling interests	63	68	42
Comprehensive income attributable to Schlumberger	$ 1,720	$ 3,786	$ 8,066

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Current Assets
Cash	$ 2,793	$ 3,130
Short-term investments	10,241	4,371
Receivables less allowance for doubtful accounts (2015 - $333; 2014 - $275)	8,780	11,171
Inventories	3,756	4,628
Deferred taxes	208	144
Other current assets	1,134	1,250
Current assets total	26,912	24,694
Fixed Income Investments, held to maturity	418	442
Investments in Affiliated Companies	3,311	3,235
Fixed Assets less accumulated depreciation	13,415	15,396
Multiclient Seismic Data	1,026	793
Goodwill	15,605	15,487
Intangible Assets	4,569	4,654
Other Assets	2,749	2,203
Total Assets	68,005	66,904
Current Liabilities
Accounts payable and accrued liabilities	7,727	9,246
Estimated liability for taxes on income	1,203	1,647
Long-term debt - current portion	3,011	1,244
Short-term borrowings	1,546	1,521
Dividends payable	634	518
Current Liabilities Total	14,121	14,176
Long-term Debt	14,442	10,565
Postretirement Benefits	1,434	1,501
Deferred Taxes	1,075	1,296
Other Liabilities	1,028	1,317
Total Liabilities	32,100	28,855
Equity
Common stock	12,693	12,495
Treasury stock	(13,372)	(11,772)
Retained earnings	40,870	41,333
Accumulated other comprehensive loss	(4,558)	(4,206)
Schlumberger stockholders' equity	35,633	37,850
Noncontrolling interests	272	199
Total equity	35,905	38,049
Liabilities and stockholders equity	$ 68,005	$ 66,904

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts on receivable	$ 333	$ 275	$ 384	$ 202

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income		$ 2,135	$ 5,506	$ 6,774
Add: Loss from discontinued operations			205	69
Adjustments to reconcile net income to cash provided by operating activities:
Gain on formation of OneSubsea				(1,028)
Impairments and other charges		2,575	1,773	608
Depreciation and amortization	[1]	4,078	4,094	3,879
Pension and other postretirement benefits expense		438	355	518
Stock-based compensation expense		326	329	315
Pension and other postretirement benefits funding		(346)	(390)	(538)
Earnings of equity method investments, less dividends received		(125)	(113)	(71)
Change in assets and liabilities:
Decrease (increase) in receivables	[2]	2,176	(187)	(803)
Decrease (increase) in inventories	[2]	625	(36)	188
Decrease in other current assets	[2]	76	119	17
Decrease (increase) in other assets	[2]	16	(134)	(78)
(Decrease) increase in accounts payable and accrued liabilities	[2]	(2,656)	(36)	654
(Decrease) increase in estimated liability for taxes on income	[2]	(699)	104	34
Increase (decrease) in other liabilities	[2]	24	(79)	60
Other	[2]	162	(315)	92
NET CASH PROVIDED BY OPERATING ACTIVITIES		8,805	11,195	10,690
Cash flows from investing activities:
Capital expenditures		(2,410)	(3,976)	(3,943)
SPM investments		(953)	(740)	(902)
Multiclient seismic data capitalized		(486)	(321)	(394)
Business acquisitions and investments, net of cash acquired		(443)	(1,008)	(1,210)
(Purchase) sale of investments, net		(5,848)	446	(648)
Other		(112)	19	218
NET CASH USED IN INVESTING ACTIVITIES		(10,252)	(5,580)	(6,879)
Cash flows from financing activities:
Dividends paid		(2,419)	(1,968)	(1,608)
Proceeds from employee stock purchase plan		296	295	270
Proceeds from exercise of stock options		152	530	267
Stock repurchase program		(2,182)	(4,678)	(2,596)
Proceeds from issuance of long-term debt		9,565	2,289	4,554
Repayment of long-term debt		(3,771)	(2,878)	(3,141)
Net (decrease) increase in short-term borrowings		(3)	552	37
Other		(264)	(38)	18
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES		1,374	(5,896)	(2,199)
Cash flow (used in) provided by discontinued operations - operating activities		(233)	24	(2)
Cash flow used in discontinued operations - investing activities				(28)
Cash flow (used in) provided by discontinued operations		(233)	24	(30)
Net (decrease) increase in cash before translation effect		(306)	(257)	1,582
Translation effect on cash		(31)	(85)	(15)
Cash, beginning of period		3,130	3,472	1,905
Cash, end of period		$ 2,793	$ 3,130	$ 3,472
[1]	Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.
[2]	Net of the effect of business acquisitions and divestitures.

CONSOLIDATED STATEMENT OF STOCK

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock Issued	Common Stock In Treasury	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 2012	$ 34,858	$ 11,912	$ (6,160)	$ 32,887	$ (3,888)	$ 107
Net income	6,774			6,732		42
Currency translation adjustments	(151)				(151)
Changes in fair value of marketable securities	35				35
Changes in fair value of cash flow hedges	(1)				(1)
Pension and other postretirement benefit plans	1,451				1,451
Shares sold to optionees, less shares exchanged	$ 267	(44)	$ 311
Shares sold to optionees, less shares exchanged, shares	5		5
Vesting of restricted stock		(56)	$ 56
Vesting of restricted stock, shares	1		1
Shares issued under employee stock purchase plan	$ 270	18	$ 252
Shares issued under employee stock purchase plan, shares	4		4
Stock repurchase program	$ (2,596)		$ (2,596)
Stock repurchase program, shares	(31)		(31)
Stock-based compensation expense	$ 315	315
Dividends declared	(1,653)			(1,653)
Other	66	47	$ 2			17
Balance at Dec. 31, 2013	$ 39,635	$ 12,192	$ (8,135)	37,966	(2,554)	166
Balance, shares at Dec. 31, 2012	1,328	1,434	(106)
Balance, shares at Dec. 31, 2013	1,307	1,434	(127)
Net income	$ 5,506			5,438		68
Currency translation adjustments	(463)				(463)
Changes in fair value of marketable securities	(166)				(166)
Changes in fair value of cash flow hedges	(125)				(125)
Pension and other postretirement benefit plans	(898)				(898)
Shares sold to optionees, less shares exchanged	$ 530	$ (26)	$ 556
Shares sold to optionees, less shares exchanged, shares	9		9
Vesting of restricted stock		(79)	$ 79
Vesting of restricted stock, shares	1		1
Shares issued under employee stock purchase plan	$ 295	33	$ 262
Shares issued under employee stock purchase plan, shares	4		4
Stock repurchase program	$ (4,678)		$ (4,678)
Stock repurchase program, shares	(48)		(48)
Stock-based compensation expense	$ 329	329
Dividends declared	(2,071)			(2,071)
Shares issued for acquisition	$ 213	72	$ 141
Shares issued for acquisition, shares	2		2
Other	$ (58)	(26)	$ 3			(35)
Balance at Dec. 31, 2014	$ 38,049	$ 12,495	$ (11,772)	41,333	(4,206)	199
Balance, shares at Dec. 31, 2014	1,275	1,434	(159)
Net income	$ 2,135			2,072		63
Currency translation adjustments	(522)				(522)
Changes in fair value of marketable securities	(10)				(10)
Changes in fair value of cash flow hedges	57				57
Pension and other postretirement benefit plans	123				123
Shares sold to optionees, less shares exchanged	$ 152	$ (38)	$ 190
Shares sold to optionees, less shares exchanged, shares	3		3
Vesting of restricted stock		(112)	$ 112
Vesting of restricted stock, shares	1		1
Shares issued under employee stock purchase plan	$ 296	17	$ 279
Shares issued under employee stock purchase plan, shares	4		4
Stock repurchase program	$ (2,182)		$ (2,182)
Stock repurchase program, shares	(27)		(27)
Stock-based compensation expense	$ 326	326
Dividends declared	(2,535)			(2,535)
Other	16	5	$ 1			10
Balance at Dec. 31, 2015	$ 35,905	$ 12,693	$ (13,372)	$ 40,870	$ (4,558)	$ 272
Balance, shares at Dec. 31, 2015	1,256	1,434	(178)

CONSOLIDATED STATEMENT OF STOC8

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Retained Earnings
Dividends declared, per share	$ 2	$ 1.60	$ 1.25

Business Description

Business Description	12 Months Ended
	Dec. 31, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business Description	1. Business Description Schlumberger Limited (Schlumberger N.V., incorporated in Curaçao ) and its consolidated subsidiaries (collectively, “Schlumberger”) comprise the world’s leading supplier of technology, integrated project management and information solutions to the international oil and gas exploration and production industry. On August 26, 2015, Schlumberger and Cameron International Corporations (Cameron) jointly announced that they had entered into a definitive merger agreement in which Cameron will merge with an indirect wholly-owned subsidiary of Schlumberger in a stock and cash transaction. Cameron designs, manufactures, markets and services equipment used by the oil and gas industry and industrial manufacturing companies. Under the terms of the merger agreement, Cameron shareholders will receive 0.716 shares of Schlumberger common stock and a cash payment of $ 14.44 in exchange for each Cameron share of common stock outstanding. Schlumberger estimates that it will issue approximately 137 million shares of its common stock and pay cash of approximately $ 2.8 billion in connection with this transaction. The transaction remains subject to certain regulatory approvals and customary closing conditions. It is anticipated that the closing of the transaction will occur in the first quarter of 2016. Cameron reported revenue of $ 10.4 billion for the year ended December 31, 201 4 .

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Summary of Accounting Policies	2. Summary of Accounting Policies The Consolidated Financial Statements of Schlumberger have been prepared in accordance with accounting principles generally accepted in the United States of America. Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, Schlumberger evaluates its estimates, including those related to collectibility of accounts receivable; recoverability of fixed assets , goodwill, intangible assets , Schlumberger Production Management investments and investments in affiliates; income taxes; multiclient seismic data; contingencies and actuarial assumptions for employee benefit plans. Schlumberger bases its estimates on historical experience and other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. Revenue Recognition Schlumberger recognizes revenue based upon purchase orders, contracts or other persuasive evidence of an arrangement with the customer that include fixed or determinable prices provided that collectibility is reasonably assured. Revenue is recognized for services when they are rendered. Revenue is recognized for products upon delivery and when the customer assumes the risks and rewards of ownership. Revenue from seismic contract services performed on a dayrate basis is recognized as the service is performed. Revenue from other services, including pre-funded multiclient surveys, is recognized as the seismic data is acquired and/or processed on a proportionate basis as work is performed. This method requires revenue to be recognized based upon quantifiable measures of progress, such as square kilometers acquired. Multiclient data surveys are licensed or sold to customers on a non-transferable basis. Revenue from sales of completed multiclient data surveys is recognized upon obtaining a signed licensing agreement and providing customers with access to such data. Revenue is occasionally generated from contractual arrangements that include multiple deliverables. Revenue from these arrangements is recognized as each item is delivered based on their relative fair value , provided that the delivered items have stand-alone value to the customer. Revenue derived from the sale of licenses of Schlumberger software may include installation, maintenance, consulting and training services. If services are not essential to the functionality of the software, the revenue for each element of the contract is recognized separately based on its respective vendor specific objective evidence of fair value when all of the following conditions are met: a signed contract is obtained, delivery has occurred, the fee is fixed or determinable and collectibility is probable. Short-term and Fixed Income Investments The Consolidated Balance Sheet reflects the Schlumberger investment portfolio separated between current and long term, based on maturity. Both Short-term investments and Fixed Income Investments, held to maturity are comprised primarily of money market funds, time deposits, certificates of deposit, commercial paper, bonds and notes, substantially all of which are denominated in US dollars. Under normal circumstances Schlumberger intends to hold such investments until maturity . These investments are stated at cost plus accrued interest, which approximates market. For purposes of the Consolidated Statement of Cash Flows , Schlumberger does not consider Short-term investments to be cash equivalents. Fixed Income Investments, held to maturity at December 31, 2015 of $ 418 million mature as follows: $ 107 million in 2017 , $ 298 million in 2018 , $ 12 million in 2019 and $ 1 million in 2020 . Investments in Affiliated Companies Investments in companies in which Schlumberger does not have a controlling financial interest, but over which it has significant influence are accounted for using the equity method. Schlumberger’s share of the after-tax earnings of equity method investees is included in Interest and other income . Investments in privately held companies in which Schlumberger does not have the ability to exercise significant influence are accounted for using the cost method. Investments in publicly traded companies in which Schlumberger does not have significant influence are accounted for as available-for-sale marketable securities. These marketable securities are reported at fair value, based on quoted market prices, with unrealized gains and losses reported as a component of Accumulated other comprehensive loss . The fair value of these marketable securities was $ 41 million at December 31, 2015 ( $ 91 million at December 31, 2014) . The cost basis of these marketable securities was $ 41 million at December 31, 2015 ( $ 81 million at December 31, 2014) after reflecting a $ 40 million other-than-tempora r y impairment charge recorded during the fourth quarter of 2015. Equity and cost method investments as well as investments in publicly traded companies are classified as Investments in Affiliated Companies in the Consolidated Balance Sheet . Multiclient Seismic Data The multiclient library consists of completed and in-process seismic surveys that are licensed on a nonexclusive basis. Schlumberger capitalizes costs directly incurred in acquiring and processing the multiclient seismic data. Such costs are charged to Cost of revenue based on the percentage of the total costs to the estimated total revenue that Schlumberger expects to receive from the sales of such data. However, under no circumstance will an individual survey carry a net book value greater than a 4-year, straight-line amortized value. The carrying value of the multiclient library is reviewed for impairment annually as well as when an event or change in circumstance indicating impairment may have occurred. Adjustments to the carrying value are recorded when it is determined that estimated future cash flows, which involves significant judgment on the part of Schlumberger, would not be sufficient to recover the carrying value of the surveys. Significant adverse changes in Schlumberger’s estimated future cash flows could result in impairment charges in a future period. Schlumberger Production Management Schlumberger Production Management ( “ SPM ” ) projects are focused on developing and co-managing the production of Schlumberger customers’ assets under long-term agreements. Schlumberger will invest its own services, products and in some cases cash, into the field development activities and operations. Although in certain arrangements Schlumberger is paid for a portion of the services or products it provides, generally Schlumberger will not be paid at the time of providing its services or upon delivery of its products. Instead, Schlumberger is compensated based upon cash flow generated or on a fee-per-barrel basis . This may include certain arrangements whereby Schlumberger is only compensated based upon incremental production it helps deliver above a mutually agreed baseline. Schlumberger capitalizes its cash investments in a project as well as the direct costs associated with providing services or products for which Schlumberger will be compensated when the related production is achieved . Revenue is recognized as the related production is achieved. These capitalized investments are amortized to the Consolidated Statement of Income as the related oil production is achieved based on the units of production method, whereby each unit produced is assigned a pro-rata portion of the unamortized costs based on estimated total production, resulting in a matching of revenue with the applicable costs. The unamortized portion of Schlumberger’s investments in SPM projects was approximately $ 1.829 billion and $ 1.411 billion at December 31, 2015 and 2014 , respectively. These amounts are included within Other Assets in Schlumberger’s Consolidated Balance Sheet . Concentration of Credit Risk Schlumberger’s assets that are exposed to concentrations of credit risk consist primarily of cash, short-term investments, fixed income investments held to maturity, receivables from clients and derivative financial instruments. Schlumberger places its cash, short-term investments and fixed income investments held to maturity with financial institutions and corporations, and limits the amount of credit exposure with any one of them. Schlumberger regularly evaluates the creditworthiness of the issuers in which it invests. By using derivative financial instruments to hedge certain exposure s , Schlumberger exposes itself to some credit risk. Schlumberger minimizes this credit risk by entering into transactions with high-quality counterparties, limiting the exposure to each counterparty and monitoring the financial condition of its counterparties. Schlumberger operates in more than 85 countries and as such, its accounts receivable are spread over many countries and customers. As of December 31, 2015, only two countries (Venezuela and Mexico) individually accounted for greater than 10% of Schlumberger ’s accounts receivable balance. Schlumberger has experienced delays in payment from its national oil company customer in Venezuela. Schlumberger maintains an allowance for uncollectible accounts receivable based on expected collectibility and performs ongoing credit evaluations of its customers’ financial condition. If the financial condition of its customers were to deteriorate resulting in an impairment of their ability to make payments, adjustments to the allowance may be required. Earnings per Share The following is a reconciliation from basic to diluted earnings per share from continuing operations of Schlumberger for each of the last three years: (Stated in millions, except per share amounts) Schlumberger Income from Continuing Operations Average Shares Outstanding Earnings per Share from Continuing Operations 2015: Basic ............................................... $ 2,072 1,267 $ 1.63 Assumed exercise of stock options .......................... - 4 Unvested restricted stock ................................. - 4 Diluted ............................................. $ 2,072 1,275 $ 1.63 2014: Basic ............................................... $ 5,643 1,295 $ 4.36 Assumed exercise of stock options ........................... - 9 Unvested restricted stock .................................. - 4 Diluted ............................................. $ 5,643 1,308 $ 4.31 2013: Basic ............................................... $ 6,801 1,323 $ 5.14 Assumed exercise of stock options ........................... - 6 Unvested restricted stock .................................. - 4 Diluted ............................................. $ 6,801 1,333 $ 5.10 Employee stock options to purchase 20 million, 5 million and 12 million shares of common stock at December 31, 2015 , 2014 and 2013 , respectively, were outstanding but not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common stock, and therefore the effect on diluted earnings per share would have been anti-dilutive. Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers . This ASU amends the existing accounting standards for revenue recognition and is based on the principle that revenue should be recognized to depict the transfer of goods or services to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. Schlumberger is required to adopt this ASU on January 1, 20 18, with early adoption permitted on January 1, 2017, and does not expect this ASU to have a material impact on its consolidated financial statements. In November 2015, the FASB issued ASU 2015-17 , Balance Sheet Classification of Deferred Taxes , which amends existing guidance on income taxes to require the classification of all deferred tax assets and liabilities as non-current on the balance sheet. Schlumberger is required to adopt this ASU no later than January 1, 2018 , with early adoption permitted, and the guidance may be applied either prospectively or retrospectively. Schlumberger does not expect this ASU to have a material impact on its consolidated financial statements.

Charges and Credits

Charges and Credits	12 Months Ended
	Dec. 31, 2015
Restructuring And Related Activities [Abstract]
Charges and Credits	3. Charges and Credits Schlumberger recorded the following charges and credits in continuing operations during 20 15 , 20 14 and 20 13 : 2015 Schlumberger decided to reduce its headcount during the first quarter of 2015 as a result of the severe fall in activity in North America, combined with the impact of lower international activity due to customer budget cuts driven by lower oil prices . Schlumberger recorded a $ 390 million charge during the first quarter associated with this headcount reduction as well as an incentivized leave of absence program. Based on the activity outlook for 2016, as well as to further streamline its support structure, Schlumberger decided to further reduce its headcount and expand its incentivized leave of absence program during the fourth quarter of 2015. Schlumberger recorded an additional $ 530 million charge during the fourth quarter associated with these actions . Approximately $ 360 million of the costs remained unpaid as of December 31, 2015. As a result of unfavorable oil and gas industry market conditions that have continued to deteriorate and their impact on the activity outlook, Schlumberger determined that the carrying values of certain assets were no longer recoverable and also took certain decisions that resulted in the following impairment and restructuring charges during the fourth quarter of 2015: - $ 776 million of fixed asset impairments primarily related to underutilized pressure pumping and other equipment in North America, as well as certain lower-tier drilling rigs. The fair value of these assets was based on the projected present value of future cash flow s that these assets are expected to generate. - $ 269 million to write-down the carrying value of certain inventory, primarily in North America . - $ 182 million to reduce the carrying value of an investment in an SPM project to its estimated fair value , as a result of the recent decline in commodity prices and considering t his project is approaching the end of its contractual term . T he fair value of this investment was estimated based on the projected present value of its future cash flows . - $ 177 million associated with certain of Schlumberger’s owned and leased facilities , including the expected sale of certain properties and the termination of certain leases. - $ 77 million relating to assets that are no longer recoverable as a result of geopolitical issues in certain countries in the Middle East . - $ 41 million relating to contract termination costs . - $ 84 million of other charges associated with current market conditions, including $ 40 million relating to an other -than-temporary impairment of marketable securities and $ 15 million relating to the impairment of an equity-method investment. Because certain of these impairment charges were estimated based on the projected present value of future cash flows, which included unobservable inputs that required significant judgments, additional charges may be required in future periods should industry conditions worsen . In February 2015, the Venezuelan government replaced the SICAD II exchange rate (described in further detail below) with a new foreign exchange market system known as SIMADI. The SIMADI exchange rate was approximately 192 Venezuela n Bolivares fuertes to the US dollar as of March 31, 2015. As a result, Schlumberger recorded a $ 49 million devaluation charge during the first quarter of 2015, reflecting the adoption of the SIMADI exchange rate. This change result s in a reduction in the US dollar reported amount of local currency denominated revenues, expenses and, consequently, income before taxes and net income in Venezuela. If Schlumberger had applied an exchange rate of 192 Venezuelan Bolivares fuertes to the US dollar throughout 2014, it would have reduced Schlumberger earnings by approximately $0.09 per share. The following is a summary of these charges and credits , all of which were classified as Impairments & other in the Consolidated Statement of Income : (Stated in millions) Pretax Tax Net Workforce reductions ..................................... $ 920 $ 107 $ 813 Fixed asset impairments .................................... 776 141 635 Inventory write-downs ..................................... 269 27 242 Impairment of SPM project ................................. 182 36 146 Facility closures ......................................... 177 37 140 Geopolitical events ....................................... 77 - 77 Currency devaluation loss in Venezuela ......................... 49 - 49 Contract termination costs .................................. 41 2 39 Other ................................................ 84 7 77 $ 2,575 $ 357 $ 2,218 2014 Due to the expectation of lower exploration spending as a result of lower commodity prices, during the fourth quarter of 2014, Schlumberger decided to restructure its WesternGeco marine seismic fleet in order to lower its operating costs. Three previous-generation acquisition vessels with lower towing capacity and higher operating costs will be converted to source vessels, allowing for the termination of two third-party source vessel leases and the retirement of two owned source vessels. As a result of this restructuring, Schlumberger performed an impairment test and determined that the carrying values of certain of its vessels exceeded their respective fair values by $ 590 million. This impairment charge relates to the six Explorer-class vessels that were acquired at a premium in the 2007 purchase of Eastern Echo Holdings Plc. The fair value of these vessels was estimated primarily based on the replacement cost method, which was largely based on unobservable inputs that required significant judgments. In addition to the $ 590 million impairment charge relating to these six vessels, Schlumberger also recorded an $ 85 million impairment charge relating to a seismic intangible asset and $ 131 million of other charges primarily related to lease termination costs and other seismic assets as a result of the restructuring. Schlumberger did not incur any significant cash expenditures as a result of these charges. During 2014, Venezuela enacted certain changes to its foreign exchange system such that, in addition to the official rate of 6.3 Venezuelan Bolivares fuertes per US dollar, there were two other legal exchange rates that could be obtained via different exchange rate mechanisms at the time . These changes included the expansion of what was known as the SICAD I auction rate and the introduction of the SICAD II auction process. The SICAD I and SICAD II exchange rates were approximately 11 and 50 Venezuelan Bolivares fuertes to the US dollar, respectively, at December 31, 2014. Schlumberger had historically applied the official exchange rate to remeasure local currency transactions and balances into US dollars. Effective December 31, 2014, Schlumberger concluded that it was appropriate to apply the SICAD II exchange rate as it believe d that rate best represent ed the economics of Schlumberger’s business activity in Venezuela. As a result, Schlumberger recorded a $ 472 million devaluation charge during the fourth quarter of 2014. In response to lower commodity pricing and anticipated lower exploration and production spending in 2015, Schlumberger decided during the fourth quarter of 2014 to reduce its overall headcount primarily to better align with anticipated activity levels for 2015. As a result of these reductions, Schlumberger recorded a charge of $ 296 million in the fourth quarter of 2014. During the fourth quarter of 2014, Schlumberger determined that, primarily as a result of the recent decline in commodity prices, the carrying value of its investment in an SPM development project in the Eagle Ford Shale was in excess of its fair value. Accordingly, Schlumberger recorded a $ 199 million impairment charge. The fair value of this investment was estimated based on the projected present value of future cash flows. The following is a summary of these charges , all of which were classified as Impairments & other in the Consolidated Statement of Income : (Stated in millions) Pretax Tax Net WesternGeco restructuring .................................. $ 806 $ 25 $ 781 Currency devaluation loss in Venezuela ......................... 472 - 472 Workforce reduction ...................................... 296 37 259 Impairment of SPM project ................................. 199 72 127 $ 1,773 $ 134 $ 1,639 2013 During the fourth quarter, Schlumberger recorded a $ 152 million provision relating to accounts receivable from a client in Brazil that filed for bankruptcy , which is classified in Cost of revenue in the Consolidated Statement of Income .  During the second quarter, Schlumberger recorded a $ 1.028 billion gain as a result of the deconsolidation of its subsea business in connection with the formation of the OneSubsea joint venture with Cameron , which is classified as Gain on formation of OneSubsea in the Consolidated Statement of Income . Refer to Note 4 – Acquisitions for further details.  During the second quarter, Schlumberger recorded a $ 222 million impairment charge relating to an investment in a company involved in developing drilling-related technology and a $ 142 million impairment charge relating to an investment in a contract drilling business , both of which are classified in Impairments & other in the Consolidated Statement of Income .  In February 2013, Venezuela’s currency was devalued from the prior exchange rate of 4.3 Bolivar f uertes per US dollar to 6.3 Bolivar fuertes per US dollar. As a result, Schlumberger recorded a $ 92 million devaluation charge during the first quarter of 2013 , which is classified in Impairments & other in the Consolidated Statement of Income . The following is a summary of these charges and credits: (Stated in millions) Pretax Tax Net Gain on formation of OneSubsea joint venture ..................... $ (1,028 ) $ - $ (1,028 ) Impairment of equity method investments ........................ 364 19 345 Provision for accounts receivable .............................. 152 30 122 Currency devaluation loss in Venezuela ......................... 92 - 92 $ (420 ) $ 49 $ (469 )

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Acquisitions	4. Acquisitions Formation of OneSubsea Joint Venture On June 30, 2013, Schlumberger and Cameron completed the formation of OneSubsea , a joint venture to manufacture and develop products, systems and services for the subsea oil and gas market. Schlumberger and Cameron each contributed all of their respective subsea businesses to the joint venture and Schlumberger made a $ 600 million cash payment to Cameron. Schlumberger owns 40 % of OneSubsea and account s for this investment under the equity method. Schlumberger recognized a pretax and after-tax gain of $ 1.028 billion, which is classified as Gain on formation of OneSubsea in the Consolidated Statement of Income , as a result of the deconsolidation of its subsea business. This gain is equal to the difference between the fair value of the Schlumberger subsea business, which was determined based on the present value of its estimated future cash flows, and its carrying value at the time of closing. Other Schlumberger made other acquisitions and investments for cash payments, net of cash acquired, of $ 443 m illion during 2015 , $ 1.008 b illion during 2014 , and $ 610 million during 2013 . Additionally, during 2014 Schlumberger issued 2.1 million shares of its common stock, valued at $ 213 million, in connection with an acquisition. None of these transactions were significant to Schlumberger’s consolidated financial statements , either individually or in the aggregate.

Inventories

Inventories	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventories	5. Inventories A summary of inventories , which are stated at the lower of average cost or market follows: (Stated in millions) 2015 2014 Raw materials & field materials $ 2,300 $ 2,666 Work in progress ................................................. 178 273 Finished goods .................................................. 1,278 1,689 $ 3,756 $ 4,628

Fixed Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2015
Property Plant And Equipment [Abstract]
Fixed Assets	6. Fixed Assets A summary of fixed assets follows: (Stated in millions) 2015 2014 Land ......................................................... $ 425 $ 445 Buildings & improvements .......................................... 3,960 3,733 Machinery & equipment ............................................ 31,885 31,937 Seismic vessels .................................................. 850 849 37,120 36,964 Less: Accumulated depreciation ....................................... 23,705 21,568 $ 13,415 $ 15,396 The estimated useful lives of Buildings & improvements are primarily 25 to 30 years. The estimated useful lives of Machinery & equipment are primarily 5 to 10 years. Seismic vessels are depreciated over periods ranging from 20 to 30 years. Depreciation expense , which is recorded on a straight-line basis, was $ 3. 2 billion, $ 3. 2 billion and $ 3.1 billion in 2015 , 2014 and 2013 , respectively .

Multiclient Seismic Data

Multiclient Seismic Data	12 Months Ended
	Dec. 31, 2015
Multiclient Seismic Data [Abstract]
Multiclient Seismic Data	7. Multiclient Seismic Data The change in the carrying amount of multiclient seismic data is as follows: (Stated in millions) 2015 2014 Balance at beginning of year ......................................... $ 793 $ 667 Capitalized in period .............................................. 486 321 Charged to expense ............................................... (253 ) (195 ) $ 1,026 $ 793

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	8. Goodwill The changes in the carrying amount of goodwill by reporting unit were as follows: (Stated in millions) Reservoir Characterization Drilling Production Total Balance, January 1, 2014 ........................... $ 3,737 $ 8,315 $ 2,654 $ 14,706 Acquisitions .................................... 15 271 551 837 Reallocation .................................... 83 (83 ) - - Impact of changes in exchange rates (23 ) (15 ) (18 ) (56 ) Balance, December 31, 2014 ......................... 3,812 8,488 3,187 15,487 Acquisitions .................................... 38 130 76 244 Impact of changes in exchange rates .................... (52 ) (34 ) (40 ) (126 ) Balance, December 31, 2015 ......................... $ 3,798 $ 8,584 $ 3,223 $ 15,605

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	9. Intangible Assets A summary of intangible assets follows: (Stated in millions) 2015 2014 Gross Accumulated Net Book Gross Accumulated Net Book Book Value Amortization Value Book Value Amortization Value Customer Relationships $ 2,489 $ 645 $ 1,844 2,531 523 $ 2,008 Technology/Technical Know-How 1,864 653 1,211 1,747 535 1,212 Tradenames 1,625 367 1,258 1,641 319 1,322 Other ...................... 513 257 256 380 268 112 $ 6,491 $ 1,922 $ 4,569 $ 6,299 $ 1,645 $ 4,654 Customer relationships are generally amortized over periods ranging from 18 to 28 years, technology\technical know-how are generally amortized over periods ranging from 10 to 18 years, and tradenames are generally amortized over periods ranging from 15 to 30 years. Amortization expense was $ 354 million in 2015, $ 344 million in 2014 and $ 330 million in 2013. Based on the carrying value of intangible assets at December 31, 2015 , a mortization expense for the subsequent five years is estimated to be as follows: 2016 : $ 373 million, 2017 : $ 365 million, 2018 : $ 357 million, 2019 : $ 341 million and 2020 : $ 319 million.

Long-term Debt and Debt Facilit

Long-term Debt and Debt Facility Agreements	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Long-term Debt and Debt Facility Agreements	10. Long-term Debt and Debt Facility Agreements Long-term Debt consists of the following: (Stated in millions) 2015 2014 4.00 % Senior Notes due 2025 (1) ...................................... $ 1,741 $ - 3.30 % Senior Notes due 2021 ......................................... 1,597 1,597 3.00 % Senior Notes due 2020 (1) ...................................... 1,591 - 3.65 % Senior Notes due 2023 ......................................... 1,496 1,495 2.35 % Senior Notes due 2018 (1) ...................................... 1,297 - 4.20 % Senior Notes due 2021 ......................................... 1,100 1,100 1.25 % Senior Notes due 2017 ......................................... 1,000 1,000 2.40 % Senior Notes due 2022 ......................................... 999 999 3.63 % Senior Notes due 2022 (1) ...................................... 845 - 1.50 % Guaranteed Notes due 2019 (2) ................................... 566 628 1.90 % Senior Notes due 2017 (1) ...................................... 499 - 1.95 % Senior Notes due 2016 ......................................... - 1,100 2.65 % Senior Notes due 2016 (3) ...................................... - 500 Commercial paper borrowings ........................................ 1,000 1,538 Other ......................................................... 711 608 $ 14,442 $ 10,565 (1) If the closing of the Cameron merger does not occur on or prior to August 25, 2016 (which may be extended to November 25, 2016 under certain circumstances ) or if the Cameron merger agreement is terminated at any time prior thereto, these notes will be subject to a special mandatory redemption. The special mandatory redemption price will be equal to 101 % of the aggregate principal amount of the notes that are redeemed, plus accrued and unpaid interest. ( 2 ) Schlumberger maintains a € 5 .0 billion Guaranteed Euro Medium Term Note program that provides for the issuance of various types of debt instruments such as fixed or floating rate notes in euro, US dollar or other currencies. Schlumberger issued € 0.5 billion 1.50 % Guaranteed Notes due 2019 under this program in the fourth quarter of 2013. Schlumberger entered into agreements to swap these euro notes for US dollars on the date of issue until maturity, effectively making this a US dollar denominated debt on which Schlumberger will pay interest in US dollars at a rate equal to three-month LIBOR plus approximately 64 basis points. ( 3 ) 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 pays interest at a rate of 2.39 %. Schlumberger Limited fully and unconditionally guarantees the securities issued by certain of its subsidiaries, including securities issued by Schlumberger Investment SA, a wholly-owned finance subsidiary of Schlumberger. At December 31, 2015 , Schlumberger had separate committed debt facility agreements aggregating $ 3.8 billion with commercial banks, of which $ 1.4 billion was available and unused. This included $ 3.5 billion of committed facilities which support commercial paper program s in the United States and Europe , of which $ 250 m illion mature s in July 2016, $ 1.75 billion mature s in July 201 8 , and $ 1.5 billion mature s in November 2018 . Interest rates and other terms of borrowing under these lines of credit vary from country to country. Commercial paper borrowings are classified as long-term debt to the extent of their backup by available and unused committed credit facilities maturing in more than one year and to the extent it is Schlumberger’s intent to maintain these obligations for longer than one year. Borrowings under the commercial paper program at December 31, 2015 were $ 2.4 billion, of which $ 1.0 billion was classified within Long-term debt and $ 1.4 billion was classified in Long-term debt – current portion in the Consolidated Balance Sheet . At December 31, 2014 , b orrowings under the commercial paper program were $ 1.5 million , all of which were classified within Long-term debt in the Consolidated Balance Sheet . The weighted average interest rate on variable rate debt as of December 31, 2015 was 1.0 %. Long-term Debt as of December 31, 2015 , is due as follows: $ 1.5 billion in 20 17 , $ 2.6 billion in 201 8 , $ 0.9 billion in 20 19, $ 1.6 billion in 2020, $ 2.7 billion in 2021, $ 1.9 billion in 2022 , $ 1.5 billion in 202 3 and $ 1.7 billion in 2025 . The fair value of Schlumberger’s Long-term Debt at December 31, 2015 and December 31, 2014 was $ 14.4 billion and $ 10.7 billion, respectively, and was estimated based on quoted market prices.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2015
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	11. Derivative Instruments and Hedging Activities Schlumberger is exposed to market risks related to fluctuations in interest rates and foreign currency exchange rates. To mitigate these risks, Schlumberger utilizes derivative instruments. Schlumberger does not enter into derivative transactions for speculative purposes. 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 fourth quarter of 2013, Schlumberger entered into a cross currency swap for a notional amount of € 0.5 billion in order to hedge changes in the fair value of Schlumberger’s € 0.5 billion 1.50% Guaranteed Notes due 2019. Under the terms of this swap, Schlumberger will receive interest at a fixed rate of 1.50% on the euro notional amount and pay interest at a floating rate of three-month LIBOR plus approximately 64 basis points on the US dollar notional amount. This cross currency 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 largely offset the respective gains and losses recognized on changes in the fair value of the hedged debt. At December 31, 2015 , Schlumberger had fixed rate debt aggregating $ 13.8 billion and variable rate debt aggregating $ 5.2 billion, after taking into account the effect of the swap. Short-term investments and Fixed income investments , held to maturity , totaled $ 10.7 billion at December 31, 2015 . The carrying value of these investments approximated fair value, which was estimated using quoted market prices for those or similar investments. Foreign Currency Exchange Rate Risk As a multinational company, Schlumberger conducts its business in approximately 85 countries. Schlumberger’s functional currency is primarily the US dollar . Approximately 83 % of Schlumberger’s revenue s in 2015 was denominated in US dollars. 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 the local currency is not the functional currency and expenses denominated in local currency are not equal to revenues denominated in local currency. Schlumberger is also exposed to risks on future cash flows relating to certain of its fixed rate 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 December 31, 2015 , Schlumberger recognized a cumulative net $ 39 million loss in Accumulated other comprehensive loss 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 exposed to changes in the fair value of assets and liabilities which are denominated in currencies other than the functional currency. While Schlumberger uses foreign currency forward contracts and foreign currency options to economically hedge this exposure as it relates to certain currencies, these contracts are not designated as hedges for accounting purposes. Instead the fair value of the contracts are recorded on the Consolidated Balance Sheet and changes in the fair value are recognized in the Consolidated Statement of Income as are changes in fair value of the hedged item. Transaction losses of $ 27 million, $ 67 million and $ 24 million, net of related hedging activities , were recognized in the Consolidated Statement of Income in 2015, 2014 and 2013, respectively. At December 31, 2015 , contracts were outstanding for the US dollar equivalent of $ 3.8 billion in various foreign currencies, of which $ 1.2 billion relate s to hedges of debt denominated in currencies other than the functional currency. The fair values of outstanding derivative instruments are summarized as follows: (Stated in millions) Fair Value of Derivatives Consolidated Balance Sheet Classification 2015 2014 Derivative Assets Derivatives designated as hedges: Foreign exchange contracts ......................... $ 4 $ 3 Other current assets Foreign exchange contracts ......................... 6 32 Other Assets $ 10 $ 35 Derivatives not designated as hedges: Foreign exchange contracts ......................... $ 15 $ 5 Other current assets $ 25 $ 40 Derivative Liabilities Derivatives designated as hedges: Foreign exchange contracts ......................... $ 37 $ 80 Accounts payable and accrued liabilities Foreign exchange contracts ......................... 3 105 Other Liabilities Cross currency swap ............................. 22 42 Other Liabilities $ 62 $ 227 Derivatives not designated as hedges: Foreign exchange contracts ......................... $ 25 $ 28 Accounts payable and accrued liabilities $ 87 $ 255 The fair value of all outstanding derivatives is 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 2015 2014 2013 Consolidated Statement of Income Classification Derivatives designated as fair value hedges: Cross currency swap ............................. $ (64 ) $ (82 ) $ 15 Interest expense Derivatives not designated as hedges: Foreign exchange contracts ......................... $ (154 ) $ (95 ) $ (2 ) Cost of revenue

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity	12. Stockholders’ Equity Schlumberger is authorized to issue 4,500,000,000 shares of common stock, par value $ 0.01 per share, of which 1,256,367,980 and 1,275,312,404 shares were outstanding on December 31, 2015 and 2014 , respectively. Holders of common stock are entitled to one vote for each share of stock held. Schlumberger is also authorized to issue 200,000,000 shares of preferred stock, par value $ 0.01 per share, which may be issued in series with terms and conditions determined by the Board of Directors. No shares of preferred stock have been issued. Accumulated Other Comprehensive Loss consists of the following: (Stated in millions) Unrealized Pension and Currency Gain/(Loss) on Other Translation Marketable Cash Flow Postretirement Adjustments Securities Hedges Benefit Plans Total Balance, January 1, 2013 ............ $ (917 ) $ 141 $ 30 $ (3,142 ) $ (3,888 ) Other comprehensive income (loss) before reclassifications (151 ) 35 49 1,328 1,261 Amounts reclassified from accumulated other comprehensive loss - - (50 ) 425 375 Income taxes .................. - - - (302 ) (302 ) Balance, December 31, 2013 .......... (1,068 ) 176 29 (1,691 ) (2,554 ) Other comprehensive income (loss) before reclassifications (463 ) (166 ) (238 ) (1,285 ) (2,152 ) Amounts reclassified from accumulated other comprehensive loss - - 113 305 418 Income taxes .................. - - 82 82 Balance, December 31, 2014 .......... (1,531 ) 10 (96 ) (2,589 ) (4,206 ) Other comprehensive income (loss) before reclassifications (522 ) (50 ) (178 ) (210 ) (960 ) Amounts reclassified from accumulated other comprehensive loss - 40 235 407 682 Income taxes .................. - - - (74 ) (74 ) Balance, December 31, 2015 .......... $ (2,053 ) $ - $ (39 ) $ (2,466 ) $ (4,558 ) Other comprehensive loss was $ 352 million in 2015 and $ 1.652 b illion in 2014 . Other comprehensive income was $ 1 . 334 billion in 2013 .

Stock-based Compensation Plans

Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation Plans	13. Stock-based Compensation Plans Schlumberger has three types of stock-based compensation programs: ( i ) stock options, (ii) a restricted stock , restricted stock unit and performance share unit program (collectively referred to as “restricted stock”) and (iii) a discounted stock purchase plan (“DSPP”). Stock Options Key employees are granted stock options under Schlumberger stock option plans. For all stock options granted, the exercise price equals the average of the high and low sales prices of Schlumberger stock on the date of grant; the maximum term is ten years, and the options generally vest in increments over five years. The fair value of each stock option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions and resulting weighted-average fair value per share: 2015 2014 2013 Dividend yield ......................................... 2.3 % 1.6 % 1.7 % Expected volatility ...................................... 36 % 37 % 38 % Risk free interest rate ..................................... 1.7 % 2.2 % 1.2 % Expected option life in years ................................ 7.0 7.0 7.0 Weighted-average fair value per share ......................... $ 25.96 $ 34.20 $ 23.93 The following table summarizes information concerning options outstanding and options exercisable as of December 31, 2015 : (Shares stated in thousands) Options Outstanding Options Exercisable Weighted- average remaining Weighted- Weighted- Options contractual life average Options average Exercise prices range Outstanding (in years) exercise price Exercisable exercise price $37.85 - $67.87 ............................. 4,882 2.5 $ 51.61 4,857 $ 51.53 $68.51 - $70.93 ............................. 7,499 5.6 $ 69.81 4,873 $ 69.26 $72.11 - $78.31 ............................. 8,927 7.0 $ 73.56 3,206 $ 72.51 $83.88 - $84.93 ............................. 7,585 4.4 $ 84.17 6,514 $ 84.21 $88.61 - $114.83 ............................ 12,194 8.0 $ 95.48 2,920 $ 96.55 41,087 6.1 $ 78.73 22,370 $ 73.79 The weighted average remaining contractual life of stock options exercisable as of December 31, 2015 was 4.4 years. The following table summarizes stock option activity during the years ended December 31, 2015 , 2014 and 20 13 : (Shares stated in thousands) 2015 2014 2013 Weighted- Weighted- Weighted- average average average exercise exercise exercise Shares price Shares price Shares price Outstanding at beginning of year ............. 38,583 $ 76.10 41,939 $ 70.33 42,059 $ 67.77 Granted .............................. 7,118 $ 86.86 6,105 $ 99.04 6,570 $ 72.16 Exercised ............................. (2,561 ) $ 60.10 (8,269 ) $ 64.19 (5,168 ) $ 51.73 Forfeited ............................. (2,053 ) $ 80.34 (1,192 ) $ 73.56 (1,522 ) $ 70.57 Outstanding at year-end ................... 41,087 $ 78.73 38,583 $ 76.10 41,939 $ 70.33 The aggregate intrinsic value of both stock options outstanding and stock options exercisable as of December 31, 2015 was $ 93 million , respectively . The total intrinsic value of options exercised during the years ended December 31, 2015 , 2014 and 2013 was $ 62 million, $ 314 million and $ 176 million, respectively. Restricted Stock Schlumberger grants performance share units to certain executives. The number of shares earned is determined at the end of each performance period, which is generally three years, based on Schlumberger’s achievement of a predefined return on capital employed (“ROCE”), as defined in the underlying performance share unit agreement. In the event the ROCE exceeds the predefined target, shares for up to the maximum of 250 % of the target award may be granted. In the event the ROCE falls below the predefined target, a reduced number of shares may be granted. If the ROCE falls below the threshold award performance level, no shares will be granted. As of December 31, 2015 , performance share units of 0.9 million were outstanding based on the achievement of 100% of target . All other restricted stock awards generally vest at the end of three years. Restricted stock awards do not pay dividends or allow voting rights during the performance period. Accordingly, the fair value of the restricted stock award is the quoted market price of Schlumberger’s stock on the date of grant less the present value of the expected dividends not received during the vesting period. The following table summarizes information about all restricted stock transactions: (Shares stated in thousands) 2015 2014 2013 Weighted Weighted Weighted Average Average Average Restricted Grant Date Restricted Grant Date Restricted Grant Date Stock Fair Value Stock Fair Value Stock Fair Value Unvested at beginning of year ............... 4,138 $ 80.80 4,171 $ 76.01 3,566 $ 73.62 Granted .............................. 1,254 $ 82.37 1,341 $ 96.08 1,949 $ 75.65 Vested ............................... (1,495 ) $ 71.30 (1,186 ) $ 81.59 (958 ) $ 66.98 Forfeited ............................. (326 ) $ 83.86 (188 ) $ 78.68 (386 ) $ 74.53 Unvested at year-end ..................... 3,571 $ 85.04 4,138 $ 80.80 4,171 $ 76.01 Discounted Stock Purchase Plan Under the terms of the DSPP, employees can choose to have a portion of their earnings withheld, subject to certain restrictions, to purchase Schlumberger common stock. The purchase price of the stock is 92.5% of the lower of the stock price at the beginning or end of the plan period at six-month intervals. The fair value of the employees’ purchase rights under the DSPP was estimated using the Black-Scholes model with the following assumptions and resulting weighted average fair value per share: 2015 2014 2013 Dividend yield .......................................... 2.3 % 1.6 % 1.7 % Expected volatility ....................................... 27 % 19 % 24 % Risk free interest rate ..................................... 0.2 % 0.1 % 0.1 % Weighted-average fair value per share .......................... $ 12.45 $ 12.67 $ 9.91 Total Stock-based Compensation Expense The following summarizes stock-based compensation expense recognized in income: (Stated in millions) 2015 2014 2013 Stock options .......................................... $ 176 $ 177 $ 165 Restricted stock ......................................... 107 114 110 DSPP ............................................... 43 38 40 $ 326 $ 329 $ 315 At December 31, 2015 , there was $ 480 million of total unrecognized compensation cost related to nonvested stock-based compensation arrangements , of which $ 215 million is expected to be recognized in 2016 , $ 137 million in 2017 , $ 80 million in 2018 , $ 40 million in 2019 and $ 8 million in 2020 . As of December 31, 2015 , approximately 27 million shares of Schlumberger common stock were available for future grants under Schlumberger’s stock-based compensation programs .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Schlumberger operates in more than 100 tax jurisdictions, where statutory tax rates generally vary from 0 % to 40 %. Income from continuing operations before taxes subject to United States and non-United States income taxes for each of the three years ended December 31, were as follows: (Stated in millions) 2015 2014 2013 United States ....................................... $ (691 ) $ 1,990 $ 1,904 Outside United States .................................. 3,572 5,649 6,787 $ 2,881 $ 7,639 $ 8,691 Schlumberger recorded pretax charges of $ 2.575 billion in 2015 ($ 883 million in the US and $ 1.692 billion outside of the US). Schlumberger recorded pretax charges of $ 1.773 billion in 2014 ($ 289 million in the US and $ 1.484 b illion outside the US) and net pretax credits of $ 420 million in 2013 ($ 53 million of charges in the US and $ 473 million of net credits outside the US ). These charges and credits are included in the table above and are more fully described in Note 3 – Charges and Credits . The components of net deferred tax assets (liabilities) were as follows: (Stated in millions) 2015 2014 Postretirement benefits ............................................. $ 266 $ 327 Intangible assets ................................................. (1,418 ) (1,435 ) Investments in non-US subsidiaries ..................................... (152 ) (227 ) Fixed assets, net ................................................. (176 ) (331 ) Inventories ..................................................... 159 112 Other, net ...................................................... 454 402 $ (867 ) $ (1,152 ) The above deferred tax balances at December 31, 2015 and 2014 were net of valuation allowances relating to net operating losses in certain countries of $ 162 million and $ 190 million, respectively. Schlumberger generally does not provide income taxes relating to undistributed earnings, as the earnings either would not be taxable when remitted or are considered to be indefinitely reinvested. The components of Taxes on income were as follows: (Stated in millions) 2015 2014 2013 Current: United States-Federal .................................. $ 90 $ 718 $ 682 United States-State .................................... 12 51 60 Outside United States .................................. 1,085 1,380 1,211 1,187 2,149 1,953 Deferred: United States-Federal .................................. $ (356 ) $ (194 ) $ (109 ) United States-State .................................... (19 ) (9 ) (4 ) Outside United States .................................. (52 ) (12 ) 34 Valuation allowance ................................... (14 ) (6 ) (26 ) (441 ) (221 ) (105 ) $ 746 $ 1,928 $ 1,848 A reconciliation of the United States statutory federal tax rate (35%) to the consolidated effective tax rate follows : 2015 2014 2013 US federal statutory rate ................................ 35 % 35 % 35 % Non-US income taxed at different rates ...................... (13 ) (11 ) (12 ) Charges and credits (See Note 3) .......................... 6 3 (2 ) Other ............................................ (2 ) (2 ) - 26 % 25 % 21 % A number of the jurisdictions in which Schlumberger operates have tax laws that are not fully defined and are evolving. Schlumberger’s tax filings are subject to regular audit by the tax authorities. These audits may result in assessments for additional taxes which are resolved with the authorities or, potentially, through the courts. Tax liabilities are recorded based on estimates of additional taxes that will be due upon the conclusion of these audits. Due to the uncertain and complex application of tax regulations, the ultimate resolution of audits may result in liabilities which could be materially different from these estimates. A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax positions for the years ended December 31, 2015 , 2014 and 2013 is as follows: (Stated in millions) 2015 2014 2013 Balance at beginning of year ............................. $ 1,402 $ 1,452 $ 1,453 Additions based on tax positions related to the current year ......... 140 154 146 Additions for tax positions of prior years ..................... 136 96 109 Additions related to acquisitions ........................... 5 43 - Impact of changes in exchange rates ........................ (78 ) (62 ) (47 ) Settlements with tax authorities ........................... (99 ) (27 ) (64 ) Reductions for tax positions of prior years .................... (203 ) (212 ) (109 ) Reductions due to the lapse of the applicable statute of limitations ..... (18 ) (42 ) (36 ) Balance at end of year ................................. $ 1,285 $ 1,402 $ 1,452 The amounts above exclude accrued interest and penalties of $ 176 million, $ 243 million and $ 253 million at December 31, 2015 , 2014 and 2013 , respectively. Schlumberger classifies interest and penalties relating to uncertain tax positions within Taxes on income in the Consolidated Statement of Income . The following table summarizes the tax years that are either currently under audit or remain open and subject to examination by the tax authorities in the most significant jurisdictions in which Schlumberger operates: Brazil ...................................................... 2010 - 2015 Canada ..................................................... 2008 - 2015 Ecuador ..................................................... 2012 - 2015 Mexico ..................................................... 2007 - 2015 Norway ..................................................... 2013 - 2015 Russia ...................................................... 2013 - 2015 Saudi Arabia ................................................. 2001 - 2015 United Kingdom ............................................... 2011 - 2015 United States ................................................. 2014 - 2015 In certain of the jurisdictions noted above, Schlumberger operates through more than one legal entity, each of which may have different open years subject to examination. The table above presents the open years subject to examination for the most material of the legal entities in each jurisdiction. Additionally, it is important to note that tax years are technically not closed until the statute of limitations in each jurisdiction expires. In the jurisdictions noted above, the statute of limitations can extend beyond the open years subject to examination.

Leases and Lease Commitments

Leases and Lease Commitments	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Leases and Lease Commitments	15. Leases and Lease Commitments Total rental expense was $ 1. 6 billion in 2015 , $ 2.1 billion in 2014 , and $ 1.9 billion in 2013 . Future minimum rental commitments under noncancelable operating leases for each of the next five years are as follows: (Stated in millions) 2016 ...................................................... $ 261 2017 ...................................................... 205 2018 ...................................................... 162 2019 ...................................................... 145 2020 ...................................................... 129 Thereafter .................................................. 526 $ 1,428

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Contingencies	16. Contingencies Schlumberger and its subsidiaries are party to various 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 with respect to any pending legal proceeding is remote. However, litigation is inherently uncertain and it is not possible to predict the disposition of any of these proceedings.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Information	17. Segment Information Schlumberger’s segments are as follows:  Reservoir Characterization Group – Consists of the principal Technologies involved in finding and defining hydrocarbon resources . These include WesternGeco , Wireline, Testing Services, Software Integrated Solutions and Integrated Services Management .  Drilling Group – Consists of the principal Technologies involved in the drilling and positioning of oil and gas wells . These include Bits & Drilling Tools , M-I SWACO, Drilling & Measurements, Land Rigs and Integrated Drilling Services .  Production Group – Consists of the principal Technologies involved in the lifetime production of oil and gas reservoirs . These include Well Services, Completions, Artificial Lift, Well Intervention, Water Services, Integrated Production Services and Schlumberger Production Management. Financial information for the years ended December 31, 2015 , 2014 and 2013 , by segment, is as follows: (Stated in millions) 2015 Depreciation Income and Capital Revenue before taxes Assets Amortization Expenditures Reservoir Characterization ...................... $ 9,501 $ 2,450 $ 8,266 $ 1,279 $ 649 Drilling .................................. 13,563 2,538 8,535 1,177 672 Production ................................ 12,548 1,585 9,937 1,216 825 Eliminations & other ......................... (137 ) (63 ) 2,067 213 264 Pretax operating income ..................... 6,510 Goodwill and intangible assets ................... 20,174 All other assets ............................. 2,262 Corporate & other (1) ......................... (768 ) 16,764 193 Interest income (2) ........................... 30 Interest expense (3) .......................... (316 ) Charges & credits (4) ......................... (2,575 ) $ 35,475 $ 2,881 $ 68,005 $ 4,078 $ 2,410 (Stated in millions) 2014 Depreciation Income and Capital Revenue before taxes Assets Amortization Expenditures Reservoir Characterization ...................... $ 12,905 $ 3,708 $ 9,191 $ 1,459 $ 1,207 Drilling .................................. 18,128 3,805 11,155 1,173 1,328 Production ................................ 17,763 3,193 11,481 1,066 1,192 Eliminations & other .......................... (216 ) (130 ) 1,572 198 249 Pretax operating income ..................... 10,576 Goodwill and intangible assets ................... 20,141 All other assets ............................. 2,186 Corporate & other (1) ......................... (848 ) 11,178 198 Interest income (2) ........................... 31 Interest expense (3) .......................... (347 ) Charges & credits (4) ......................... (1,773 ) $ 48,580 $ 7,639 $ 66,904 $ 4,094 $ 3,976 (Stated in millions) 2013 Depreciation Income and Capital Revenue before taxes Assets Amortization Expenditures Reservoir Characterization ...................... $ 13,050 $ 3,711 $ 9,316 $ 1,402 $ 1,361 Drilling .................................. 16,792 3,238 10,440 1,076 1,289 Production ................................ 15,646 2,624 10,929 1,001 1,126 Eliminations & other ......................... (222 ) (229 ) 2,332 192 167 Pretax operating income ..................... 9,344 Goodwill and intangible assets ................... 19,415 All other assets ............................. 2,618 Corporate & other (1) ......................... (726 ) 12,050 208 Interest income (2) ........................... 22 Interest expense (3) .......................... (369 ) Charges & credits (4) ......................... 420 $ 45,266 $ 8,691 $ 67,100 $ 3,879 $ 3,943 (1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. Corporate assets consist of cash, short-term investments, fixed income investments, held to maturity and investments in affiliates. (2 ) Interest income excludes amounts which are included in the segments’ income ( 2015 : $ 22 million; 2014 : $ 20 million; 2013 : $ 11 million). (3) Interest expense excludes amounts which are included in the segments’ income ( 2015 : $ 30 million; 2014 : $ 22 million; 2013 : $ 22 million). (4) See Note 3 – Charges and Credits . Segment assets consist of receivables, inventories, fixed assets , multiclient seismic data and SPM investments . Depreciation and amortization includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments . Revenue by geographic area for the years ended December 31, 2015 , 2014 and 2013 is as follows: (Stated in millions) 2015 2014 2013 North America ......................................... $ 9,811 $ 16,151 $ 13,897 Latin America .......................................... 6,014 7,699 7,754 Europe/CIS/Africa ....................................... 9,284 12,515 12,411 Middle East & Asia ...................................... 9,898 11,875 10,767 Eliminations & other ..................................... 468 340 437 $ 35,475 $ 48,580 $ 45,266 Revenue is based on the location where services are provided. During each of the three years ended December 31, 2015 , 2014 and 2013 , no single customer exceeded 10 % of consolidated revenue. Schlumberger did not have revenue from third-party customers in its country of domicile during the last three years. Revenue in the United States in 2015 , 2014 and 2013 was $ 8.5 billion, $ 14.0 billion and $ 12.0 billion, respectively. Fixed Assets less accumulated depreciation by geographic area are as follows: (Stated in millions) 2015 2014 2013 North America ......................................... $ 4,392 $ 4,885 $ 4,858 Latin America .......................................... 1,728 1,969 1,889 Europe/CIS/Africa ....................................... 2,978 3,640 3,452 Middle East & Asia ...................................... 3,078 3,446 2,991 Unallocated (1) ......................................... 1,239 1,456 1,906 $ 13,415 $ 15,396 $ 15,096 (1) Represents seismic vessels, including the related on-board equipment, which frequently transition between geographic areas.

Pension and Other Benefit Plans

Pension and Other Benefit Plans	12 Months Ended
	Dec. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Pension and Other Benefit Plans	18. Pension and Other Benefit Plans Pension Plans Schlumberger sponsors several defined benefit pension plans that cover substantially all US employees hired prior to October 1, 2004. The benefits are based on years of service and compensation, on a career-average pay basis. In addition to the United States defined benefit pension plans, Schlumberger sponsors several other international defined benefit pension plans. The most significant of these international plans are the International Staff Pension Plan and the UK pension plan (collectively, the “International plans”). The International Staff Pension Plan covers certain international employees hired prior to July 1, 2014 and is based on years of service and compensation on a career-average pay basis. The UK plan covers employees hired prior to April 1, 1999, and is based on years of service and compensation, on a final salary basis. The weighted-average assumed discount rate, compensation increases and the expected long-term rate of return on plan assets used to determine the net pension cost for the US and International plans were as follows: US International 2015 2014 2013 2015 2014 2013 Discount rate ........................... 4.15 % 4.85 % 4.25 % 4.07 % 4.76 % 4.38 % Compensation increases ................... 4.00 % 4.00 % 4.00 % 4.79 % 4.80 % 4.83 % Return on plan assets ..................... 7.25 % 7.25 % 7.50 % 7.50 % 7.50 % 7.50 % Net pension cost for 2015 , 2014 and 2013 included the following components: (Stated in millions) US International 2015 2014 2013 2015 2014 2013 Service cost - benefits earned during the period .... $ 86 $ 72 $ 80 $ 167 $ 126 $ 127 Interest cost on projected benefit obligation ...... 170 164 150 297 288 253 Expected return on plan assets ............... (229 ) (208 ) (200 ) (498 ) (450 ) (384 ) Amortization of prior service cost ............. 12 12 12 121 120 117 Amortization of net loss ................... 123 82 122 170 94 155 $ 162 $ 122 $ 164 $ 257 $ 178 $ 268 The weighted-average assumed discount rate and compensation increases used to determine the projected benefit obligations for the US and International plans were as follows: US International 2015 2014 2015 2014 Discount rate .................................... 4.50 % 4.15 % 4.36 % 4.07 % Compensation increases ............................. 4.00 % 4.00 % 4.80 % 4.79 % The changes in the projected benefit obligation, plan assets and funded status of the plans were as follows: (Stated in millions) US International 2015 2014 2015 2014 Change in Projected Benefit Obligations Projected benefit obligation at beginning of year ............ $ 4,137 $ 3,418 $ 7,249 $ 5,981 Service cost .................................... 86 72 167 126 Interest cost .................................... 170 164 297 288 Contribution by plan participants ...................... - - 143 122 Actuarial (gains) losses ............................. (205 ) 627 (203 ) 1,000 Currency effect .................................. - - (66 ) (90 ) Benefits paid ................................... (163 ) (144 ) (247 ) (178 ) Projected benefit obligation at end of year ................ $ 4,025 $ 4,137 $ 7,340 $ 7,249 Change in Plan Assets Plan assets at fair value at beginning of year ............... $ 3,549 $ 3,269 $ 6,830 $ 6,246 Actual return on plan assets .......................... (1 ) 339 (4 ) 502 Currency effect .................................. - - (69 ) (102 ) Company contributions ............................. 82 85 198 240 Contributions by plan participants ...................... - - 125 122 Benefits paid ................................... (163 ) (144 ) (248 ) (178 ) Plan assets at fair value at end of year ................... $ 3,467 $ 3,549 $ 6,832 $ 6,830 Unfunded Liability ............................... $ (558 ) $ (588 ) $ (508 ) $ (419 ) Amounts Recognized in Balance Sheet Postretirement Benefits ............................. $ (558 ) $ (588 ) $ (657 ) $ (546 ) Other Assets .................................... - - 149 127 $ (558 ) $ (588 ) $ (508 ) $ (419 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses .................................. $ 1,008 $ 1,104 $ 335 $ 1,658 Prior service cost ................................. 54 66 - 357 $ 1,062 $ 1,170 $ 335 $ 2,015 Accumulated benefit obligation ....................... $ 3,763 $ 3,805 $ 6,913 $ 6,793 The unfunded liability represents the difference between the plan assets and the projected benefit obligation (“PBO”). The PBO represents the actuarial present value of benefits based on employee service and compensation and includes an assumption about future compensation levels. The accumulated benefit obligation represents the actuarial present value of benefits based on employee service and compensation, but does not include an assumption about future compensation levels. The weighted-average allocation of plan assets and the target allocations by asset category are as follows: US International Target 2015 2014 Target 2015 2014 Equity securities ......................... 37 - 56 % 52 % 48 % 45 - 71 % 64 % 58 % Debt securities .......................... 35 - 62 36 42 20 - 35 27 32 Cash and cash equivalents .................. 0 - 3 2 5 0 - 5 2 4 Alternative investments .................... 0 - 10 10 8 0 - 25 7 6 100 % 100 % 100 % 100 % 100 % 100 % Asset performance is monitored frequently with an overall expectation that plan assets will meet or exceed the weighted index of its target asset allocation and component benchmark over rolling five -year periods. The expected long-term rate of return on assets assumptions reflect the average rate of earnings expected on funds invested or to be invested. The assumptions have been determined based on expectations regarding future rates of return for the portfolio considering the asset allocation and related historical rates of return. The appropriateness of the assumptions is reviewed annually. The fair value of Schlumberger’s pension plan assets at December 31, 2015 and 201 4 , by asset category, is presented below and was determined based on valuation techniques categorized as follows:  Level One: The use of quoted prices in active markets for identical instruments.  Level Two: The use of quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active or other inputs that are observable in the market or can be corroborated by observable market data.  Level Three: The use of significant unobservable inputs that typically require the use of management’s estimates of assumptions that market participants would use in pricing. (Stated in millions) US Plan Assets 2015 2014 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents .......... $ 86 $ 40 $ 46 $ - $ 59 $ 40 $ 19 $ - Equity Securities: US (a) ....................... 1,195 655 540 1,149 622 527 International (b) ................ 605 473 132 552 433 119 Debt Securities Corporate bonds (c) .............. 599 599 654 654 Government and government-related debt securities (d) 589 159 430 735 175 560 Collateralized mortgage obligations and mortgage backed securities (e) 65 65 107 107 Alternative Investments: Private equity (f) ................ 203 203 210 210 Real estate (g) .................. 125 125 83 83 Total .......................... $ 3,467 $ 1,327 $ 1,812 $ 328 $ 3,549 $ 1,270 $ 1,986 $ 293 (Stated in millions) International Plan Assets 2015 2014 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents .......... $ 138 $ 115 $ 23 $ - $ 264 $ 174 $ 90 $ - Equity Securities: US (a) ....................... 2,736 2,240 496 2,432 1,757 675 International (b) ................. 1,639 1,179 460 1,534 1,047 487 Debt Securities Corporate bonds (c) .............. 657 657 780 780 Government and government-related debt securities (d) 1,036 8 1,028 1,181 8 1,173 Collateralized mortgage obligations and mortgage backed securities (e) 143 143 256 256 Alternative Investments: Private equity (f) ................ 331 331 246 246 Real estate (g) .................. 49 49 49 49 Other ........................ 103 103 88 88 Total .......................... $ 6,832 $ 3,542 $ 2,807 $ 483 $ 6,830 $ 2,986 $ 3,461 $ 383 (a) US equities include companies that are well diversified by industry sector and equity style (i.e., growth and value strategies). Active and passive management strategies are employed. Investments are primarily in large capitalization stocks and, to a lesser extent, mid- and small-cap stocks. (b) International equities are invested in companies that are traded on exchanges outside the US and are well diversified by industry sector, country and equity style. Active and passive strategies are employed. The vast majority of the investments are made in companies in developed markets with a small percentage in emerging markets. (c) Corporate bonds consist primarily of investment grade bonds from diversified industries. (d) Government and government-related debt securities are comprised primarily of inflation - protected US treasuries and, to a lesser extent, other government-related securities. (e) Collateralized mortgage obligations and mortgage backed-securities are debt obligations that represent claims to the cash flows from pools of mortgage loans , which are purchased from banks, mortgage companies, and other originators and then assembled into pools by governmental, quasi-governmental and private entities. (f) Private equity includes investments in several fund of funds limited partnerships. (g) Real estate primarily includes investments in real estate limited partnerships, concentrated in commercial real estate. Schlumberger’s funding policy is to annually contribute amounts that are based upon a number of factors including the actuarial accrued liability, amounts that are deductible for income tax purposes, legal funding requirements and available cash flow. Schlumberger currently anticipates contributing approximately $ 350 million to its postretirement benefit plans in 2016 , subject to market and business conditions. Postretirement Benefits Other T han Pensions Schlumberger provides certain healthcare benefits to certain former US employees who have retired. During the fourth quarter of 2014 Schlumberger announced that, effective April 1, 2015, it will change the way it provides healthcare coverage to certain retirees who are age 65 and over. Under the amended plan, these retirees transferred to individual coverage under the Medicare Exchange. Schlumberger will subsidize the cost of the program by providing these retirees with a Health Reimbursement Account. The annual subsidy may be increased based on medical cost inflation, but it will not be increased more than 5 % in any given year. The actuarial assumptions used to determine the accumulated postretirement benefit obligation and net periodic benefit cost for the US postretirement medical plan were as follows: Benefit Obligations Net Periodic Benefit At December 31, Cost for the year 2015 2014 2015 2014 2013 Discount rate ............................... 4.50 % 4.15 % 4.15 % 4.85 % 4.25 % Return on plan assets .......................... - - 7.00 % 7.00 % 7.00 % Current medical cost trend rate ................... 7.00 % 7.00 % 7.00 % 7.25 % 7.50 % Ultimate medical cost trend rate .................. 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate trend rate ........ 2023 2023 2023 2023 2023 The net periodic benefit cost for the US postretirement medical plan included the following components: (Stated in millions) 2015 2014 2013 Service cost ........................................... $ 42 $ 43 $ 48 Interest cost ........................................... 48 60 56 Expected return on plan assets ............................... (52 ) (45 ) (37 ) Amortization of prior service credit ............................ (32 ) (4 ) (4 ) Amortization of net loss ................................... 13 1 23 $ 19 $ 55 $ 86 The changes in the accumulated postretirement benefit obligation, plan assets and funded status were as follows: (Stated in millions) 2015 2014 Change in Projected Benefit Obligations Benefit obligation at beginning of year .................................. $ 1,221 $ 1,247 Service cost .................................................... 42 43 Interest cost .................................................... 48 60 Contribution by plan participants ...................................... 7 6 Actuarial (gains) losses ............................................ (168 ) 210 Benefits paid ................................................... (47 ) (46 ) Plan amendments ................................................ - (299 ) Benefit obligation at end of year ....................................... $ 1,103 $ 1,221 Change in Plan Assets Plan assets at fair value at beginning of year ............................... $ 854 $ 731 Company contributions ............................................ 66 65 Contributions by plan participants ..................................... 7 6 Benefits paid ................................................... (47 ) (46 ) Actual return on plan assets .......................................... 4 98 Plan assets at fair value at end of year ................................... $ 884 $ 854 Unfunded Liability ............................................... $ (219 ) $ (367 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses .................................................. $ 106 $ 242 Prior service cost ................................................. (275 ) (307 ) $ (169 ) $ (65 ) The unfunded liability is included in Postretirement Benefits in the Consolidated Balance Sheet . The assets of the US postretirement medical plan are invested 60 % in equity securities and 40 % in debt securities at December 31, 2015 . The fair value of these assets was primarily determined based on Level Two valuation techniques. Assumed health care cost trend rates have a significant effect on the amounts reported for the US postretirement medical plan. A one percentage point change in assumed health care cost trend rates would have the following effects: (Stated in millions) One percentage One percentage point increase point decrease Effect on total service and interest cost components .......................... $ 7 $ (6 ) Effect on accumulated postretirement benefit obligation ....................... $ 37 $ (33 ) Other Information The expected benefits to be paid under the US and International pension plans as well as the postretirement medical plan were as follows: (Stated in millions) Pension Benefits Postretirement US International Medical Plan 2016 ................................................ $ 176 $ 242 $ 50 2017 ................................................ $ 183 $ 259 $ 53 2018 ................................................ $ 189 $ 278 $ 57 2019 ................................................ $ 197 $ 294 $ 60 2020 ................................................ $ 205 $ 310 $ 62 2021-2025 ............................................ $ 1,152 $ 1,781 $ 341 Included in Accumulated other comprehensive loss at December 31, 2015 are non-cash pretax charges which have not yet been recognized in net periodic benefit cost. The estimated portion of each component of Accumulated other comprehensive loss which is expected to be recognized as a component of net periodic benefit cost during the year ending December 31, 2016 is as follows: (Stated in millions) Postretirement Pension Plans Medical Plan Net actuarial losses ............................................... $ 163 $ - Prior service cost (credit) ........................................... $ 133 $ (32 ) In addition to providing defined pension benefits and a postretirement medical plan, Schlumberger and its subsidiaries have other deferred benefit programs, primarily profit sharing and defined contribution pension plans. Expenses for these programs were $ 565 million, $ 749 million and $ 671 million in 2015 , 2014 and 2013 , respectively.

Supplementary Information

Supplementary Information	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Supplementary Information	19. Supplementary Information Cash paid for interest and income taxes was as follows: (Stated in millions) 2015 2014 2013 Interest ................................................. $ 346 $ 389 $ 369 Income tax ............................................... $ 1,567 $ 2,048 $ 1,729 During the fourth quarter of 2015, Schlumberger entered into an agreement with one of its customers to receive certain fixed assets in lieu of payment of approximately $ 200 million of accounts receivable . Interest and other income includes the following: (Stated in millions) 2015 2014 2013 Interest income ............................................ $ 52 $ 51 $ 33 Earnings of equity method investments ............................. 184 240 132 $ 236 $ 291 $ 165 The change in Allowance for doubtful accounts is as follows: (Stated in millions) 2015 2014 2013 Balance at beginning of year .................................... $ 275 $ 384 $ 202 Provision ................................................ 75 39 205 Amounts written off ......................................... (17 ) (148 ) (23 ) Balance at end of year ........................................ $ 333 $ 275 $ 384 Accounts payable and accrued liabilities are summarized as follows: (Stated in millions) 2015 2014 Payroll, vacation and employee benefits .................................. $ 1,424 $ 1,899 Trade ......................................................... 3,243 4,344 Other ......................................................... 3,060 3,003 $ 7,727 $ 9,246

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2015
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	20. Discontinued Operations During the second quarter of 2013, Schlumberger completed the wind down of its operations in Iran and, therefore, classified the historical results of this business as a discontinued operation. In 2009, the US Department of Justice began an investigation into past violations of US sanctions regarding Schlumberger’s historical operations in Iran and Sudan that occurred between 2004 and 2010. During the second quarter of 2014, Schlumberger increase d its accrual for this contingency. Accordingly, Schlumberger recorded a $ 205 million charge, which was reflected within Loss from discontinued operations in the Consolidated Statement of Income during the second quarter of 2014. During 2015, Schlumberger resolved this investigation and a non-US subsidiary of Schlumberger pleaded guilty to one criminal count of conspiracy to violate the International Emergency Economic Powers Act. Under the terms of the plea agreement, Schlumberger paid approximately $ 233 million in fines, penalties and assessments during the second quarter of 2015, which had been previously accrued. This payment is reflected within Cash flows used in discontinued operations – operating activities in Schlumberger’s Consolidated Statement of Cash Flows. The following table summarizes the results of these discontinued operations: (Stated in millions) 2014 2013 Revenue ...................................................... $ - $ 102 Loss before taxes ................................................. $ (205 ) (63 ) Tax expense .................................................... - (6 ) Loss from discontinued operations ..................................... $ (205 ) $ (69 )

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, Schlumberger evaluates its estimates, including those related to collectibility of accounts receivable; recoverability of fixed assets , goodwill, intangible assets , Schlumberger Production Management investments and investments in affiliates; income taxes; multiclient seismic data; contingencies and actuarial assumptions for employee benefit plans. Schlumberger bases its estimates on historical experience and other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
Revenue Recognition	Revenue Recognition Schlumberger recognizes revenue based upon purchase orders, contracts or other persuasive evidence of an arrangement with the customer that include fixed or determinable prices provided that collectibility is reasonably assured. Revenue is recognized for services when they are rendered. Revenue is recognized for products upon delivery and when the customer assumes the risks and rewards of ownership. Revenue from seismic contract services performed on a dayrate basis is recognized as the service is performed. Revenue from other services, including pre-funded multiclient surveys, is recognized as the seismic data is acquired and/or processed on a proportionate basis as work is performed. This method requires revenue to be recognized based upon quantifiable measures of progress, such as square kilometers acquired. Multiclient data surveys are licensed or sold to customers on a non-transferable basis. Revenue from sales of completed multiclient data surveys is recognized upon obtaining a signed licensing agreement and providing customers with access to such data. Revenue is occasionally generated from contractual arrangements that include multiple deliverables. Revenue from these arrangements is recognized as each item is delivered based on their relative fair value , provided that the delivered items have stand-alone value to the customer. Revenue derived from the sale of licenses of Schlumberger software may include installation, maintenance, consulting and training services. If services are not essential to the functionality of the software, the revenue for each element of the contract is recognized separately based on its respective vendor specific objective evidence of fair value when all of the following conditions are met: a signed contract is obtained, delivery has occurred, the fee is fixed or determinable and collectibility is probable.
Short-term and Fixed Income Investments	Short-term and Fixed Income Investments The Consolidated Balance Sheet reflects the Schlumberger investment portfolio separated between current and long term, based on maturity. Both Short-term investments and Fixed Income Investments, held to maturity are comprised primarily of money market funds, time deposits, certificates of deposit, commercial paper, bonds and notes, substantially all of which are denominated in US dollars. Under normal circumstances Schlumberger intends to hold such investments until maturity . These investments are stated at cost plus accrued interest, which approximates market. For purposes of the Consolidated Statement of Cash Flows , Schlumberger does not consider Short-term investments to be cash equivalents. Fixed Income Investments, held to maturity at December 31, 2015 of $ 418 million mature as follows: $ 107 million in 2017 , $ 298 million in 2018 , $ 12 million in 2019 and $ 1 million in 2020 .
Investments in Affiliated Companies	Investments in Affiliated Companies Investments in companies in which Schlumberger does not have a controlling financial interest, but over which it has significant influence are accounted for using the equity method. Schlumberger’s share of the after-tax earnings of equity method investees is included in Interest and other income . Investments in privately held companies in which Schlumberger does not have the ability to exercise significant influence are accounted for using the cost method. Investments in publicly traded companies in which Schlumberger does not have significant influence are accounted for as available-for-sale marketable securities. These marketable securities are reported at fair value, based on quoted market prices, with unrealized gains and losses reported as a component of Accumulated other comprehensive loss . The fair value of these marketable securities was $ 41 million at December 31, 2015 ( $ 91 million at December 31, 2014) . The cost basis of these marketable securities was $ 41 million at December 31, 2015 ( $ 81 million at December 31, 2014) after reflecting a $ 40 million other-than-tempora r y impairment charge recorded during the fourth quarter of 2015. Equity and cost method investments as well as investments in publicly traded companies are classified as Investments in Affiliated Companies in the Consolidated Balance Sheet .
Multiclient Seismic Data	Multiclient Seismic Data The multiclient library consists of completed and in-process seismic surveys that are licensed on a nonexclusive basis. Schlumberger capitalizes costs directly incurred in acquiring and processing the multiclient seismic data. Such costs are charged to Cost of revenue based on the percentage of the total costs to the estimated total revenue that Schlumberger expects to receive from the sales of such data. However, under no circumstance will an individual survey carry a net book value greater than a 4-year, straight-line amortized value. The carrying value of the multiclient library is reviewed for impairment annually as well as when an event or change in circumstance indicating impairment may have occurred. Adjustments to the carrying value are recorded when it is determined that estimated future cash flows, which involves significant judgment on the part of Schlumberger, would not be sufficient to recover the carrying value of the surveys. Significant adverse changes in Schlumberger’s estimated future cash flows could result in impairment charges in a future period.
Schlumberger Production Management	Schlumberger Production Management Schlumberger Production Management ( “ SPM ” ) projects are focused on developing and co-managing the production of Schlumberger customers’ assets under long-term agreements. Schlumberger will invest its own services, products and in some cases cash, into the field development activities and operations. Although in certain arrangements Schlumberger is paid for a portion of the services or products it provides, generally Schlumberger will not be paid at the time of providing its services or upon delivery of its products. Instead, Schlumberger is compensated based upon cash flow generated or on a fee-per-barrel basis . This may include certain arrangements whereby Schlumberger is only compensated based upon incremental production it helps deliver above a mutually agreed baseline. Schlumberger capitalizes its cash investments in a project as well as the direct costs associated with providing services or products for which Schlumberger will be compensated when the related production is achieved . Revenue is recognized as the related production is achieved. These capitalized investments are amortized to the Consolidated Statement of Income as the related oil production is achieved based on the units of production method, whereby each unit produced is assigned a pro-rata portion of the unamortized costs based on estimated total production, resulting in a matching of revenue with the applicable costs. The unamortized portion of Schlumberger’s investments in SPM projects was approximately $ 1.829 billion and $ 1.411 billion at December 31, 2015 and 2014 , respectively. These amounts are included within Other Assets in Schlumberger’s Consolidated Balance Sheet .
Concentration of Credit Risk	Concentration of Credit Risk Schlumberger’s assets that are exposed to concentrations of credit risk consist primarily of cash, short-term investments, fixed income investments held to maturity, receivables from clients and derivative financial instruments. Schlumberger places its cash, short-term investments and fixed income investments held to maturity with financial institutions and corporations, and limits the amount of credit exposure with any one of them. Schlumberger regularly evaluates the creditworthiness of the issuers in which it invests. By using derivative financial instruments to hedge certain exposure s , Schlumberger exposes itself to some credit risk. Schlumberger minimizes this credit risk by entering into transactions with high-quality counterparties, limiting the exposure to each counterparty and monitoring the financial condition of its counterparties. Schlumberger operates in more than 85 countries and as such, its accounts receivable are spread over many countries and customers. As of December 31, 2015, only two countries (Venezuela and Mexico) individually accounted for greater than 10% of Schlumberger ’s accounts receivable balance. Schlumberger has experienced delays in payment from its national oil company customer in Venezuela. Schlumberger maintains an allowance for uncollectible accounts receivable based on expected collectibility and performs ongoing credit evaluations of its customers’ financial condition. If the financial condition of its customers were to deteriorate resulting in an impairment of their ability to make payments, adjustments to the allowance may be required.
Earnings per Share	Earnings per Share The following is a reconciliation from basic to diluted earnings per share from continuing operations of Schlumberger for each of the last three years: (Stated in millions, except per share amounts) Schlumberger Income from Continuing Operations Average Shares Outstanding Earnings per Share from Continuing Operations 2015: Basic ............................................... $ 2,072 1,267 $ 1.63 Assumed exercise of stock options .......................... - 4 Unvested restricted stock ................................. - 4 Diluted ............................................. $ 2,072 1,275 $ 1.63 2014: Basic ............................................... $ 5,643 1,295 $ 4.36 Assumed exercise of stock options ........................... - 9 Unvested restricted stock .................................. - 4 Diluted ............................................. $ 5,643 1,308 $ 4.31 2013: Basic ............................................... $ 6,801 1,323 $ 5.14 Assumed exercise of stock options ........................... - 6 Unvested restricted stock .................................. - 4 Diluted ............................................. $ 6,801 1,333 $ 5.10 Employee stock options to purchase 20 million, 5 million and 12 million shares of common stock at December 31, 2015 , 2014 and 2013 , respectively, were outstanding but not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common stock, and therefore the effect on diluted earnings per share would have been anti-dilutive.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers . This ASU amends the existing accounting standards for revenue recognition and is based on the principle that revenue should be recognized to depict the transfer of goods or services to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. Schlumberger is required to adopt this ASU on January 1, 20 18, with early adoption permitted on January 1, 2017, and does not expect this ASU to have a material impact on its consolidated financial statements. In November 2015, the FASB issued ASU 2015-17 , Balance Sheet Classification of Deferred Taxes , which amends existing guidance on income taxes to require the classification of all deferred tax assets and liabilities as non-current on the balance sheet. Schlumberger is required to adopt this ASU no later than January 1, 2018 , with early adoption permitted, and the guidance may be applied either prospectively or retrospectively. Schlumberger does not expect this ASU to have a material impact on its consolidated financial statements.

Summary of Accounting Policie30

Summary of Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Accounting Policies [Abstract]
Reconciliation of Earnings Per Share from Continuing Operations	The following is a reconciliation from basic to diluted earnings per share from continuing operations of Schlumberger for each of the last three years: (Stated in millions, except per share amounts) Schlumberger Income from Continuing Operations Average Shares Outstanding Earnings per Share from Continuing Operations 2015: Basic ............................................... $ 2,072 1,267 $ 1.63 Assumed exercise of stock options .......................... - 4 Unvested restricted stock ................................. - 4 Diluted ............................................. $ 2,072 1,275 $ 1.63 2014: Basic ............................................... $ 5,643 1,295 $ 4.36 Assumed exercise of stock options ........................... - 9 Unvested restricted stock .................................. - 4 Diluted ............................................. $ 5,643 1,308 $ 4.31 2013: Basic ............................................... $ 6,801 1,323 $ 5.14 Assumed exercise of stock options ........................... - 6 Unvested restricted stock .................................. - 4 Diluted ............................................. $ 6,801 1,333 $ 5.10

Charges and Credits (Tables)

Charges and Credits (Tables)	12 Months Ended
	Dec. 31, 2015
Restructuring And Related Activities [Abstract]
Summary of the Charges	The following is a summary of these charges and credits , all of which were classified as Impairments & other in the Consolidated Statement of Income : (Stated in millions) Pretax Tax Net Workforce reductions ..................................... $ 920 $ 107 $ 813 Fixed asset impairments .................................... 776 141 635 Inventory write-downs ..................................... 269 27 242 Impairment of SPM project ................................. 182 36 146 Facility closures ......................................... 177 37 140 Geopolitical events ....................................... 77 - 77 Currency devaluation loss in Venezuela ......................... 49 - 49 Contract termination costs .................................. 41 2 39 Other ................................................ 84 7 77 $ 2,575 $ 357 $ 2,218 The following is a summary of these charges , all of which were classified as Impairments & other in the Consolidated Statement of Income : (Stated in millions) Pretax Tax Net WesternGeco restructuring .................................. $ 806 $ 25 $ 781 Currency devaluation loss in Venezuela ......................... 472 - 472 Workforce reduction ...................................... 296 37 259 Impairment of SPM project ................................. 199 72 127 $ 1,773 $ 134 $ 1,639 The following is a summary of these charges and credits: (Stated in millions) Pretax Tax Net Gain on formation of OneSubsea joint venture ..................... $ (1,028 ) $ - $ (1,028 ) Impairment of equity method investments ........................ 364 19 345 Provision for accounts receivable .............................. 152 30 122 Currency devaluation loss in Venezuela ......................... 92 - 92 $ (420 ) $ 49 $ (469 )

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventory Disclosure	A summary of inventories , which are stated at the lower of average cost or market follows: (Stated in millions) 2015 2014 Raw materials & field materials $ 2,300 $ 2,666 Work in progress ................................................. 178 273 Finished goods .................................................. 1,278 1,689 $ 3,756 $ 4,628

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	A summary of fixed assets follows: (Stated in millions) 2015 2014 Land ......................................................... $ 425 $ 445 Buildings & improvements .......................................... 3,960 3,733 Machinery & equipment ............................................ 31,885 31,937 Seismic vessels .................................................. 850 849 37,120 36,964 Less: Accumulated depreciation ....................................... 23,705 21,568 $ 13,415 $ 15,396

Multiclient Seismic Data (Table

Multiclient Seismic Data (Tables)	12 Months Ended
	Dec. 31, 2015
Multiclient Seismic Data [Abstract]
Multiclient Seismic Data	The change in the carrying amount of multiclient seismic data is as follows: (Stated in millions) 2015 2014 Balance at beginning of year ......................................... $ 793 $ 667 Capitalized in period .............................................. 486 321 Charged to expense ............................................... (253 ) (195 ) $ 1,026 $ 793

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill by reporting unit were as follows: (Stated in millions) Reservoir Characterization Drilling Production Total Balance, January 1, 2014 ........................... $ 3,737 $ 8,315 $ 2,654 $ 14,706 Acquisitions .................................... 15 271 551 837 Reallocation .................................... 83 (83 ) - - Impact of changes in exchange rates (23 ) (15 ) (18 ) (56 ) Balance, December 31, 2014 ......................... 3,812 8,488 3,187 15,487 Acquisitions .................................... 38 130 76 244 Impact of changes in exchange rates .................... (52 ) (34 ) (40 ) (126 ) Balance, December 31, 2015 ......................... $ 3,798 $ 8,584 $ 3,223 $ 15,605

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets by Major Class	A summary of intangible assets follows: (Stated in millions) 2015 2014 Gross Accumulated Net Book Gross Accumulated Net Book Book Value Amortization Value Book Value Amortization Value Customer Relationships $ 2,489 $ 645 $ 1,844 2,531 523 $ 2,008 Technology/Technical Know-How 1,864 653 1,211 1,747 535 1,212 Tradenames 1,625 367 1,258 1,641 319 1,322 Other ...................... 513 257 256 380 268 112 $ 6,491 $ 1,922 $ 4,569 $ 6,299 $ 1,645 $ 4,654

Long-term Debt and Debt Facil37

Long-term Debt and Debt Facility Agreements (Tables)	12 Months Ended
	Dec. 31, 2015
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt consists of the following: (Stated in millions) 2015 2014 4.00 % Senior Notes due 2025 (1) ...................................... $ 1,741 $ - 3.30 % Senior Notes due 2021 ......................................... 1,597 1,597 3.00 % Senior Notes due 2020 (1) ...................................... 1,591 - 3.65 % Senior Notes due 2023 ......................................... 1,496 1,495 2.35 % Senior Notes due 2018 (1) ...................................... 1,297 - 4.20 % Senior Notes due 2021 ......................................... 1,100 1,100 1.25 % Senior Notes due 2017 ......................................... 1,000 1,000 2.40 % Senior Notes due 2022 ......................................... 999 999 3.63 % Senior Notes due 2022 (1) ...................................... 845 - 1.50 % Guaranteed Notes due 2019 (2) ................................... 566 628 1.90 % Senior Notes due 2017 (1) ...................................... 499 - 1.95 % Senior Notes due 2016 ......................................... - 1,100 2.65 % Senior Notes due 2016 (3) ...................................... - 500 Commercial paper borrowings ........................................ 1,000 1,538 Other ......................................................... 711 608 $ 14,442 $ 10,565 (1) If the closing of the Cameron merger does not occur on or prior to August 25, 2016 (which may be extended to November 25, 2016 under certain circumstances ) or if the Cameron merger agreement is terminated at any time prior thereto, these notes will be subject to a special mandatory redemption. The special mandatory redemption price will be equal to 101 % of the aggregate principal amount of the notes that are redeemed, plus accrued and unpaid interest. ( 2 ) Schlumberger maintains a € 5 .0 billion Guaranteed Euro Medium Term Note program that provides for the issuance of various types of debt instruments such as fixed or floating rate notes in euro, US dollar or other currencies. Schlumberger issued € 0.5 billion 1.50 % Guaranteed Notes due 2019 under this program in the fourth quarter of 2013. Schlumberger entered into agreements to swap these euro notes for US dollars on the date of issue until maturity, effectively making this a US dollar denominated debt on which Schlumberger will pay interest in US dollars at a rate equal to three-month LIBOR plus approximately 64 basis points. ( 3 ) 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 pays interest at a rate of 2.39 %.

Derivative Instruments and He38

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2015
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Fair Values of Outstanding Derivative Instruments	The fair values of outstanding derivative instruments are summarized as follows: (Stated in millions) Fair Value of Derivatives Consolidated Balance Sheet Classification 2015 2014 Derivative Assets Derivatives designated as hedges: Foreign exchange contracts ......................... $ 4 $ 3 Other current assets Foreign exchange contracts ......................... 6 32 Other Assets $ 10 $ 35 Derivatives not designated as hedges: Foreign exchange contracts ......................... $ 15 $ 5 Other current assets $ 25 $ 40 Derivative Liabilities Derivatives designated as hedges: Foreign exchange contracts ......................... $ 37 $ 80 Accounts payable and accrued liabilities Foreign exchange contracts ......................... 3 105 Other Liabilities Cross currency swap ............................. 22 42 Other Liabilities $ 62 $ 227 Derivatives not designated as hedges: Foreign exchange contracts ......................... $ 25 $ 28 Accounts payable and accrued liabilities $ 87 $ 255
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 2015 2014 2013 Consolidated Statement of Income Classification Derivatives designated as fair value hedges: Cross currency swap ............................. $ (64 ) $ (82 ) $ 15 Interest expense Derivatives not designated as hedges: Foreign exchange contracts ......................... $ (154 ) $ (95 ) $ (2 ) Cost of revenue

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss consists of the following: (Stated in millions) Unrealized Pension and Currency Gain/(Loss) on Other Translation Marketable Cash Flow Postretirement Adjustments Securities Hedges Benefit Plans Total Balance, January 1, 2013 ............ $ (917 ) $ 141 $ 30 $ (3,142 ) $ (3,888 ) Other comprehensive income (loss) before reclassifications (151 ) 35 49 1,328 1,261 Amounts reclassified from accumulated other comprehensive loss - - (50 ) 425 375 Income taxes .................. - - - (302 ) (302 ) Balance, December 31, 2013 .......... (1,068 ) 176 29 (1,691 ) (2,554 ) Other comprehensive income (loss) before reclassifications (463 ) (166 ) (238 ) (1,285 ) (2,152 ) Amounts reclassified from accumulated other comprehensive loss - - 113 305 418 Income taxes .................. - - 82 82 Balance, December 31, 2014 .......... (1,531 ) 10 (96 ) (2,589 ) (4,206 ) Other comprehensive income (loss) before reclassifications (522 ) (50 ) (178 ) (210 ) (960 ) Amounts reclassified from accumulated other comprehensive loss - 40 235 407 682 Income taxes .................. - - - (74 ) (74 ) Balance, December 31, 2015 .......... $ (2,053 ) $ - $ (39 ) $ (2,466 ) $ (4,558 )

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted Average Assumptions Used in Estimating Fair Value of Stock Options	The fair value of each stock option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions and resulting weighted-average fair value per share: 2015 2014 2013 Dividend yield ......................................... 2.3 % 1.6 % 1.7 % Expected volatility ...................................... 36 % 37 % 38 % Risk free interest rate ..................................... 1.7 % 2.2 % 1.2 % Expected option life in years ................................ 7.0 7.0 7.0 Weighted-average fair value per share ......................... $ 25.96 $ 34.20 $ 23.93
Options Outstanding and Option Exercisable	The following table summarizes information concerning options outstanding and options exercisable as of December 31, 2015 : (Shares stated in thousands) Options Outstanding Options Exercisable Weighted- average remaining Weighted- Weighted- Options contractual life average Options average Exercise prices range Outstanding (in years) exercise price Exercisable exercise price $37.85 - $67.87 ............................. 4,882 2.5 $ 51.61 4,857 $ 51.53 $68.51 - $70.93 ............................. 7,499 5.6 $ 69.81 4,873 $ 69.26 $72.11 - $78.31 ............................. 8,927 7.0 $ 73.56 3,206 $ 72.51 $83.88 - $84.93 ............................. 7,585 4.4 $ 84.17 6,514 $ 84.21 $88.61 - $114.83 ............................ 12,194 8.0 $ 95.48 2,920 $ 96.55 41,087 6.1 $ 78.73 22,370 $ 73.79
Summary of Stock Option Activity	The following table summarizes stock option activity during the years ended December 31, 2015 , 2014 and 20 13 : (Shares stated in thousands) 2015 2014 2013 Weighted- Weighted- Weighted- average average average exercise exercise exercise Shares price Shares price Shares price Outstanding at beginning of year ............. 38,583 $ 76.10 41,939 $ 70.33 42,059 $ 67.77 Granted .............................. 7,118 $ 86.86 6,105 $ 99.04 6,570 $ 72.16 Exercised ............................. (2,561 ) $ 60.10 (8,269 ) $ 64.19 (5,168 ) $ 51.73 Forfeited ............................. (2,053 ) $ 80.34 (1,192 ) $ 73.56 (1,522 ) $ 70.57 Outstanding at year-end ................... 41,087 $ 78.73 38,583 $ 76.10 41,939 $ 70.33
Restricted Stock Transactions	The following table summarizes information about all restricted stock transactions: (Shares stated in thousands) 2015 2014 2013 Weighted Weighted Weighted Average Average Average Restricted Grant Date Restricted Grant Date Restricted Grant Date Stock Fair Value Stock Fair Value Stock Fair Value Unvested at beginning of year ............... 4,138 $ 80.80 4,171 $ 76.01 3,566 $ 73.62 Granted .............................. 1,254 $ 82.37 1,341 $ 96.08 1,949 $ 75.65 Vested ............................... (1,495 ) $ 71.30 (1,186 ) $ 81.59 (958 ) $ 66.98 Forfeited ............................. (326 ) $ 83.86 (188 ) $ 78.68 (386 ) $ 74.53 Unvested at year-end ..................... 3,571 $ 85.04 4,138 $ 80.80 4,171 $ 76.01
Assumptions Used in Estimating Fair Value of Purchase Rights under Discounted Stock Purchase Plan	The fair value of the employees’ purchase rights under the DSPP was estimated using the Black-Scholes model with the following assumptions and resulting weighted average fair value per share: 2015 2014 2013 Dividend yield .......................................... 2.3 % 1.6 % 1.7 % Expected volatility ....................................... 27 % 19 % 24 % Risk free interest rate ..................................... 0.2 % 0.1 % 0.1 % Weighted-average fair value per share .......................... $ 12.45 $ 12.67 $ 9.91
Stock-Based Compensation Expense Recognized in Income	The following summarizes stock-based compensation expense recognized in income: (Stated in millions) 2015 2014 2013 Stock options .......................................... $ 176 $ 177 $ 165 Restricted stock ......................................... 107 114 110 DSPP ............................................... 43 38 40 $ 326 $ 329 $ 315

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income from Continuing Operations Before Taxes	Income from continuing operations before taxes subject to United States and non-United States income taxes for each of the three years ended December 31, were as follows: (Stated in millions) 2015 2014 2013 United States ....................................... $ (691 ) $ 1,990 $ 1,904 Outside United States .................................. 3,572 5,649 6,787 $ 2,881 $ 7,639 $ 8,691
Components of Net Deferred Tax Assets (Liabilities)	The components of net deferred tax assets (liabilities) were as follows: (Stated in millions) 2015 2014 Postretirement benefits ............................................. $ 266 $ 327 Intangible assets ................................................. (1,418 ) (1,435 ) Investments in non-US subsidiaries ..................................... (152 ) (227 ) Fixed assets, net ................................................. (176 ) (331 ) Inventories ..................................................... 159 112 Other, net ...................................................... 454 402 $ (867 ) $ (1,152 )
Components of Consolidated Income Taxes	The components of Taxes on income were as follows: (Stated in millions) 2015 2014 2013 Current: United States-Federal .................................. $ 90 $ 718 $ 682 United States-State .................................... 12 51 60 Outside United States .................................. 1,085 1,380 1,211 1,187 2,149 1,953 Deferred: United States-Federal .................................. $ (356 ) $ (194 ) $ (109 ) United States-State .................................... (19 ) (9 ) (4 ) Outside United States .................................. (52 ) (12 ) 34 Valuation allowance ................................... (14 ) (6 ) (26 ) (441 ) (221 ) (105 ) $ 746 $ 1,928 $ 1,848
Reconciliation of US Statutory Federal Tax Rate	A reconciliation of the United States statutory federal tax rate (35%) to the consolidated effective tax rate follows : 2015 2014 2013 US federal statutory rate ................................ 35 % 35 % 35 % Non-US income taxed at different rates ...................... (13 ) (11 ) (12 ) Charges and credits (See Note 3) .......................... 6 3 (2 ) Other ............................................ (2 ) (2 ) - 26 % 25 % 21 %
Reconciliation of Liabilities Associated with Uncertain Tax Provisions	A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax positions for the years ended December 31, 2015 , 2014 and 2013 is as follows: (Stated in millions) 2015 2014 2013 Balance at beginning of year ............................. $ 1,402 $ 1,452 $ 1,453 Additions based on tax positions related to the current year ......... 140 154 146 Additions for tax positions of prior years ..................... 136 96 109 Additions related to acquisitions ........................... 5 43 - Impact of changes in exchange rates ........................ (78 ) (62 ) (47 ) Settlements with tax authorities ........................... (99 ) (27 ) (64 ) Reductions for tax positions of prior years .................... (203 ) (212 ) (109 ) Reductions due to the lapse of the applicable statute of limitations ..... (18 ) (42 ) (36 ) Balance at end of year ................................. $ 1,285 $ 1,402 $ 1,452
Tax Years Subject to Examination by Tax Authorities	The following table summarizes the tax years that are either currently under audit or remain open and subject to examination by the tax authorities in the most significant jurisdictions in which Schlumberger operates: Brazil ...................................................... 2010 - 2015 Canada ..................................................... 2008 - 2015 Ecuador ..................................................... 2012 - 2015 Mexico ..................................................... 2007 - 2015 Norway ..................................................... 2013 - 2015 Russia ...................................................... 2013 - 2015 Saudi Arabia ................................................. 2001 - 2015 United Kingdom ............................................... 2011 - 2015 United States ................................................. 2014 - 2015

Leases and Lease Commitments (T

Leases and Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2015
Leases [Abstract]
Future Minimum Rental Commitments Under Noncancelable Operating Leases	Future minimum rental commitments under noncancelable operating leases for each of the next five years are as follows: (Stated in millions) 2016 ...................................................... $ 261 2017 ...................................................... 205 2018 ...................................................... 162 2019 ...................................................... 145 2020 ...................................................... 129 Thereafter .................................................. 526 $ 1,428

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Financial information for the years ended December 31, 2015 , 2014 and 2013 , by segment, is as follows: (Stated in millions) 2015 Depreciation Income and Capital Revenue before taxes Assets Amortization Expenditures Reservoir Characterization ...................... $ 9,501 $ 2,450 $ 8,266 $ 1,279 $ 649 Drilling .................................. 13,563 2,538 8,535 1,177 672 Production ................................ 12,548 1,585 9,937 1,216 825 Eliminations & other ......................... (137 ) (63 ) 2,067 213 264 Pretax operating income ..................... 6,510 Goodwill and intangible assets ................... 20,174 All other assets ............................. 2,262 Corporate & other (1) ......................... (768 ) 16,764 193 Interest income (2) ........................... 30 Interest expense (3) .......................... (316 ) Charges & credits (4) ......................... (2,575 ) $ 35,475 $ 2,881 $ 68,005 $ 4,078 $ 2,410 (Stated in millions) 2014 Depreciation Income and Capital Revenue before taxes Assets Amortization Expenditures Reservoir Characterization ...................... $ 12,905 $ 3,708 $ 9,191 $ 1,459 $ 1,207 Drilling .................................. 18,128 3,805 11,155 1,173 1,328 Production ................................ 17,763 3,193 11,481 1,066 1,192 Eliminations & other .......................... (216 ) (130 ) 1,572 198 249 Pretax operating income ..................... 10,576 Goodwill and intangible assets ................... 20,141 All other assets ............................. 2,186 Corporate & other (1) ......................... (848 ) 11,178 198 Interest income (2) ........................... 31 Interest expense (3) .......................... (347 ) Charges & credits (4) ......................... (1,773 ) $ 48,580 $ 7,639 $ 66,904 $ 4,094 $ 3,976 (Stated in millions) 2013 Depreciation Income and Capital Revenue before taxes Assets Amortization Expenditures Reservoir Characterization ...................... $ 13,050 $ 3,711 $ 9,316 $ 1,402 $ 1,361 Drilling .................................. 16,792 3,238 10,440 1,076 1,289 Production ................................ 15,646 2,624 10,929 1,001 1,126 Eliminations & other ......................... (222 ) (229 ) 2,332 192 167 Pretax operating income ..................... 9,344 Goodwill and intangible assets ................... 19,415 All other assets ............................. 2,618 Corporate & other (1) ......................... (726 ) 12,050 208 Interest income (2) ........................... 22 Interest expense (3) .......................... (369 ) Charges & credits (4) ......................... 420 $ 45,266 $ 8,691 $ 67,100 $ 3,879 $ 3,943 (1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. Corporate assets consist of cash, short-term investments, fixed income investments, held to maturity and investments in affiliates. (2 ) Interest income excludes amounts which are included in the segments’ income ( 2015 : $ 22 million; 2014 : $ 20 million; 2013 : $ 11 million). (3) Interest expense excludes amounts which are included in the segments’ income ( 2015 : $ 30 million; 2014 : $ 22 million; 2013 : $ 22 million). (4) See Note 3 – Charges and Credits .
Revenue by Geographic Area	Revenue by geographic area for the years ended December 31, 2015 , 2014 and 2013 is as follows: (Stated in millions) 2015 2014 2013 North America ......................................... $ 9,811 $ 16,151 $ 13,897 Latin America .......................................... 6,014 7,699 7,754 Europe/CIS/Africa ....................................... 9,284 12,515 12,411 Middle East & Asia ...................................... 9,898 11,875 10,767 Eliminations & other ..................................... 468 340 437 $ 35,475 $ 48,580 $ 45,266
Fixed Assets Less Accumulated Depreciation by Geographic Area	Fixed Assets less accumulated depreciation by geographic area are as follows: (Stated in millions) 2015 2014 2013 North America ......................................... $ 4,392 $ 4,885 $ 4,858 Latin America .......................................... 1,728 1,969 1,889 Europe/CIS/Africa ....................................... 2,978 3,640 3,452 Middle East & Asia ...................................... 3,078 3,446 2,991 Unallocated (1) ......................................... 1,239 1,456 1,906 $ 13,415 $ 15,396 $ 15,096 (1) Represents seismic vessels, including the related on-board equipment, which frequently transition between geographic areas.

Pension and Other Benefit Pla44

Pension and Other Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2015
Compensation And Retirement Disclosure [Abstract]
Weighted-Average Assumed Discount Rate, Compensation Increases and Expected Long-Term Rate of Return on Plan Assets Used to Determine Net Pension Cost for US and International Plans	The weighted-average assumed discount rate, compensation increases and the expected long-term rate of return on plan assets used to determine the net pension cost for the US and International plans were as follows: US International 2015 2014 2013 2015 2014 2013 Discount rate ........................... 4.15 % 4.85 % 4.25 % 4.07 % 4.76 % 4.38 % Compensation increases ................... 4.00 % 4.00 % 4.00 % 4.79 % 4.80 % 4.83 % Return on plan assets ..................... 7.25 % 7.25 % 7.50 % 7.50 % 7.50 % 7.50 %
Net Pension Cost for Schlumberger Pension Plans and US Postretirement Medical Plan	Net pension cost for 2015 , 2014 and 2013 included the following components: (Stated in millions) US International 2015 2014 2013 2015 2014 2013 Service cost - benefits earned during the period .... $ 86 $ 72 $ 80 $ 167 $ 126 $ 127 Interest cost on projected benefit obligation ...... 170 164 150 297 288 253 Expected return on plan assets ............... (229 ) (208 ) (200 ) (498 ) (450 ) (384 ) Amortization of prior service cost ............. 12 12 12 121 120 117 Amortization of net loss ................... 123 82 122 170 94 155 $ 162 $ 122 $ 164 $ 257 $ 178 $ 268 The net periodic benefit cost for the US postretirement medical plan included the following components: (Stated in millions) 2015 2014 2013 Service cost ........................................... $ 42 $ 43 $ 48 Interest cost ........................................... 48 60 56 Expected return on plan assets ............................... (52 ) (45 ) (37 ) Amortization of prior service credit ............................ (32 ) (4 ) (4 ) Amortization of net loss ................................... 13 1 23 $ 19 $ 55 $ 86
Weighted-Average Assumed Discount Rate and Compensation Increases Used to Determine Projected Benefit Obligations for US and International Plans	The weighted-average assumed discount rate and compensation increases used to determine the projected benefit obligations for the US and International plans were as follows: US International 2015 2014 2015 2014 Discount rate .................................... 4.50 % 4.15 % 4.36 % 4.07 % Compensation increases ............................. 4.00 % 4.00 % 4.80 % 4.79 %
Changes In Projected Benefit Obligation Plan Assets And Funded Status Of Plans	The changes in the projected benefit obligation, plan assets and funded status of the plans were as follows: (Stated in millions) US International 2015 2014 2015 2014 Change in Projected Benefit Obligations Projected benefit obligation at beginning of year ............ $ 4,137 $ 3,418 $ 7,249 $ 5,981 Service cost .................................... 86 72 167 126 Interest cost .................................... 170 164 297 288 Contribution by plan participants ...................... - - 143 122 Actuarial (gains) losses ............................. (205 ) 627 (203 ) 1,000 Currency effect .................................. - - (66 ) (90 ) Benefits paid ................................... (163 ) (144 ) (247 ) (178 ) Projected benefit obligation at end of year ................ $ 4,025 $ 4,137 $ 7,340 $ 7,249 Change in Plan Assets Plan assets at fair value at beginning of year ............... $ 3,549 $ 3,269 $ 6,830 $ 6,246 Actual return on plan assets .......................... (1 ) 339 (4 ) 502 Currency effect .................................. - - (69 ) (102 ) Company contributions ............................. 82 85 198 240 Contributions by plan participants ...................... - - 125 122 Benefits paid ................................... (163 ) (144 ) (248 ) (178 ) Plan assets at fair value at end of year ................... $ 3,467 $ 3,549 $ 6,832 $ 6,830 Unfunded Liability ............................... $ (558 ) $ (588 ) $ (508 ) $ (419 ) Amounts Recognized in Balance Sheet Postretirement Benefits ............................. $ (558 ) $ (588 ) $ (657 ) $ (546 ) Other Assets .................................... - - 149 127 $ (558 ) $ (588 ) $ (508 ) $ (419 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses .................................. $ 1,008 $ 1,104 $ 335 $ 1,658 Prior service cost ................................. 54 66 - 357 $ 1,062 $ 1,170 $ 335 $ 2,015 Accumulated benefit obligation ....................... $ 3,763 $ 3,805 $ 6,913 $ 6,793
Weighted-Average Allocation of Plan Assets and Target Allocation by Asset Category	The weighted-average allocation of plan assets and the target allocations by asset category are as follows: US International Target 2015 2014 Target 2015 2014 Equity securities ......................... 37 - 56 % 52 % 48 % 45 - 71 % 64 % 58 % Debt securities .......................... 35 - 62 36 42 20 - 35 27 32 Cash and cash equivalents .................. 0 - 3 2 5 0 - 5 2 4 Alternative investments .................... 0 - 10 10 8 0 - 25 7 6 100 % 100 % 100 % 100 % 100 % 100 %
Fair Value of Schlumberger's Pension Plan Assets	The fair value of Schlumberger’s pension plan assets at December 31, 2015 and 201 4 , by asset category, is presented below and was determined based on valuation techniques categorized as follows:  Level One: The use of quoted prices in active markets for identical instruments.  Level Two: The use of quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active or other inputs that are observable in the market or can be corroborated by observable market data.  Level Three: The use of significant unobservable inputs that typically require the use of management’s estimates of assumptions that market participants would use in pricing. (Stated in millions) US Plan Assets 2015 2014 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents .......... $ 86 $ 40 $ 46 $ - $ 59 $ 40 $ 19 $ - Equity Securities: US (a) ....................... 1,195 655 540 1,149 622 527 International (b) ................ 605 473 132 552 433 119 Debt Securities Corporate bonds (c) .............. 599 599 654 654 Government and government-related debt securities (d) 589 159 430 735 175 560 Collateralized mortgage obligations and mortgage backed securities (e) 65 65 107 107 Alternative Investments: Private equity (f) ................ 203 203 210 210 Real estate (g) .................. 125 125 83 83 Total .......................... $ 3,467 $ 1,327 $ 1,812 $ 328 $ 3,549 $ 1,270 $ 1,986 $ 293 (Stated in millions) International Plan Assets 2015 2014 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents .......... $ 138 $ 115 $ 23 $ - $ 264 $ 174 $ 90 $ - Equity Securities: US (a) ....................... 2,736 2,240 496 2,432 1,757 675 International (b) ................. 1,639 1,179 460 1,534 1,047 487 Debt Securities Corporate bonds (c) .............. 657 657 780 780 Government and government-related debt securities (d) 1,036 8 1,028 1,181 8 1,173 Collateralized mortgage obligations and mortgage backed securities (e) 143 143 256 256 Alternative Investments: Private equity (f) ................ 331 331 246 246 Real estate (g) .................. 49 49 49 49 Other ........................ 103 103 88 88 Total .......................... $ 6,832 $ 3,542 $ 2,807 $ 483 $ 6,830 $ 2,986 $ 3,461 $ 383 (a) US equities include companies that are well diversified by industry sector and equity style (i.e., growth and value strategies). Active and passive management strategies are employed. Investments are primarily in large capitalization stocks and, to a lesser extent, mid- and small-cap stocks. (b) International equities are invested in companies that are traded on exchanges outside the US and are well diversified by industry sector, country and equity style. Active and passive strategies are employed. The vast majority of the investments are made in companies in developed markets with a small percentage in emerging markets. (c) Corporate bonds consist primarily of investment grade bonds from diversified industries. (d) Government and government-related debt securities are comprised primarily of inflation - protected US treasuries and, to a lesser extent, other government-related securities. (e) Collateralized mortgage obligations and mortgage backed-securities are debt obligations that represent claims to the cash flows from pools of mortgage loans , which are purchased from banks, mortgage companies, and other originators and then assembled into pools by governmental, quasi-governmental and private entities. (f) Private equity includes investments in several fund of funds limited partnerships. (g) Real estate primarily includes investments in real estate limited partnerships, concentrated in commercial real estate.
Defined Benefit Plan Weighted Average Assumptions Used in Calculating Benefit Obligation and Net Periodic Benefit Cost for US Postretirement Medical Plan	The actuarial assumptions used to determine the accumulated postretirement benefit obligation and net periodic benefit cost for the US postretirement medical plan were as follows: Benefit Obligations Net Periodic Benefit At December 31, Cost for the year 2015 2014 2015 2014 2013 Discount rate ............................... 4.50 % 4.15 % 4.15 % 4.85 % 4.25 % Return on plan assets .......................... - - 7.00 % 7.00 % 7.00 % Current medical cost trend rate ................... 7.00 % 7.00 % 7.00 % 7.25 % 7.50 % Ultimate medical cost trend rate .................. 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate trend rate ........ 2023 2023 2023 2023 2023
Changes in Accumulated Postretirement Benefit Obligation, Plan Assets and Funded Status	The changes in the accumulated postretirement benefit obligation, plan assets and funded status were as follows: (Stated in millions) 2015 2014 Change in Projected Benefit Obligations Benefit obligation at beginning of year .................................. $ 1,221 $ 1,247 Service cost .................................................... 42 43 Interest cost .................................................... 48 60 Contribution by plan participants ...................................... 7 6 Actuarial (gains) losses ............................................ (168 ) 210 Benefits paid ................................................... (47 ) (46 ) Plan amendments ................................................ - (299 ) Benefit obligation at end of year ....................................... $ 1,103 $ 1,221 Change in Plan Assets Plan assets at fair value at beginning of year ............................... $ 854 $ 731 Company contributions ............................................ 66 65 Contributions by plan participants ..................................... 7 6 Benefits paid ................................................... (47 ) (46 ) Actual return on plan assets .......................................... 4 98 Plan assets at fair value at end of year ................................... $ 884 $ 854 Unfunded Liability ............................................... $ (219 ) $ (367 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses .................................................. $ 106 $ 242 Prior service cost ................................................. (275 ) (307 ) $ (169 ) $ (65 )
Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates	Assumed health care cost trend rates have a significant effect on the amounts reported for the US postretirement medical plan. A one percentage point change in assumed health care cost trend rates would have the following effects: (Stated in millions) One percentage One percentage point increase point decrease Effect on total service and interest cost components .......................... $ 7 $ (6 ) Effect on accumulated postretirement benefit obligation ....................... $ 37 $ (33 )
Expected Benefits to be Paid Under US and International Pension Plans and Postretirement Medical Plan	The expected benefits to be paid under the US and International pension plans as well as the postretirement medical plan were as follows: (Stated in millions) Pension Benefits Postretirement US International Medical Plan 2016 ................................................ $ 176 $ 242 $ 50 2017 ................................................ $ 183 $ 259 $ 53 2018 ................................................ $ 189 $ 278 $ 57 2019 ................................................ $ 197 $ 294 $ 60 2020 ................................................ $ 205 $ 310 $ 62 2021-2025 ............................................ $ 1,152 $ 1,781 $ 341
Defined Benefit Plan, Amounts that will be Amortized from Accumulated Other Comprehensive Income (Loss) In Next Fiscal Year	Included in Accumulated other comprehensive loss at December 31, 2015 are non-cash pretax charges which have not yet been recognized in net periodic benefit cost. The estimated portion of each component of Accumulated other comprehensive loss which is expected to be recognized as a component of net periodic benefit cost during the year ending December 31, 2016 is as follows: (Stated in millions) Postretirement Pension Plans Medical Plan Net actuarial losses ............................................... $ 163 $ - Prior service cost (credit) ........................................... $ 133 $ (32 )

Supplementary Information (Tabl

Supplementary Information (Tables)	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Cash Paid For Interest And Income Taxes [Table Text Block]	Cash paid for interest and income taxes was as follows: (Stated in millions) 2015 2014 2013 Interest ................................................. $ 346 $ 389 $ 369 Income tax ............................................... $ 1,567 $ 2,048 $ 1,729
Interest and Other Income [Table Text Block]	Interest and other income includes the following: (Stated in millions) 2015 2014 2013 Interest income ............................................ $ 52 $ 51 $ 33 Earnings of equity method investments ............................. 184 240 132 $ 236 $ 291 $ 165
Change in Allowance for Doubtful Accounts	The change in Allowance for doubtful accounts is as follows: (Stated in millions) 2015 2014 2013 Balance at beginning of year .................................... $ 275 $ 384 $ 202 Provision ................................................ 75 39 205 Amounts written off ......................................... (17 ) (148 ) (23 ) Balance at end of year ........................................ $ 333 $ 275 $ 384
Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities are summarized as follows: (Stated in millions) 2015 2014 Payroll, vacation and employee benefits .................................. $ 1,424 $ 1,899 Trade ......................................................... 3,243 4,344 Other ......................................................... 3,060 3,003 $ 7,727 $ 9,246

Discontinued Operations (Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2015
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations	The following table summarizes the results of these discontinued operations: (Stated in millions) 2014 2013 Revenue ...................................................... $ - $ 102 Loss before taxes ................................................. $ (205 ) (63 ) Tax expense .................................................... - (6 ) Loss from discontinued operations ..................................... $ (205 ) $ (69 )

Business Description - Addition

Business Description - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Aug. 26, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Revenue		$ 35,475	$ 48,580	$ 45,266
Cameron
Business Acquisition Equity Interests Issued Or Issuable [Line Items]
Common stock received by Cameron shareholders	71.60%
Cash payment in exchange of each share of common stock	$ 14.44
Number of shares issued under merger agreement	137
Additional cash payments under merger agreement	$ 2,800
Revenue			$ 10,400

Summary of Accounting Policie48

Summary of Accounting Policies - Additional Information (Detail) shares in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2015USD ($)Countryshares	Dec. 31, 2015USD ($)Countryshares	Dec. 31, 2014USD ($)shares	Dec. 31, 2013shares
Organization And Summary Of Significant Accounting Policies [Line Items]
Fixed Income Investments, held to maturity	$ 418	$ 418	$ 442
Fixed Income Investments, held to maturity, 2017	107	107
Fixed Income Investments, held to maturity, 2018	298	298
Fixed Income Investments, held to maturity, 2019	12	12
Fixed Income Investments, held to maturity, 2020	1	1
Carrying value of marketable securities	41	41	81
Fair value of marketable securities	41	$ 41	$ 91
Other than temporary impairment charge recorded	$ 40
Number of countries in which Schlumberger conducts business | Country	85	85
Number of reportable segments accounted for greater than 10% of accounts receivable | Country		2
Employee stock options to purchase | shares	20	20	5	12
Schlumberger Production Management
Organization And Summary Of Significant Accounting Policies [Line Items]
Unamortized investments	$ 1,829	$ 1,829	$ 1,411

Summary of Accounting Policie49

Summary of Accounting Policies - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Schlumberger Income from Continuing Operations
Basic	$ 2,072	$ 5,643	$ 6,801
Diluted	$ 2,072	$ 5,643	$ 6,801
Average shares outstanding:
Basic	1,267	1,295	1,323
Assumed exercise of stock options	4	9	6
Unvested restricted stock	4	4	4
Diluted	1,275	1,308	1,333
Earnings per Share from Continuing Operations
Basic	$ 1.63	$ 4.36	$ 5.14
Diluted	$ 1.63	$ 4.31	$ 5.10

Charges and Credits - Additiona

Charges and Credits - Additional Information (Detail) $ in Millions	3 Months Ended						12 Months Ended
	Dec. 31, 2015USD ($)	Mar. 31, 2015USD ($)VEF / $	Dec. 31, 2014USD ($)VEF / $	Dec. 31, 2013USD ($)	Jun. 30, 2013USD ($)	Mar. 31, 2013USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)VesselVEF / $	Dec. 31, 2013USD ($)	Feb. 28, 2013VEF / $	Dec. 31, 2012VEF / $
Charges And Credits [Line Items]
Restructuring and other charges							$ 2,575	$ 1,773	$ 420
Exchange rate | VEF / $		192
Foreign currency transactions, description							This change results in a reduction in the US dollar reported amount of local currency denominated revenues, expenses and, consequently, income before taxes and net income in Venezuela. If Schlumberger had applied an exchange rate of 192 Venezuelan Bolivares fuertes to the US dollar throughout 2014, it would have reduced Schlumberger earnings by approximately $0.09 per share.
Vessel termination, description							Three previous-generation acquisition vessels with lower towing capacity and higher operating costs will be converted to source vessels, allowing for the termination of two third-party source vessel leases and the retirement of two owned source vessels.
Impairment charge, Pretax			$ 199
Charges, Pretax			$ 296
Charges and credits, Pretax									(420)
Charges and credits, Net									(469)
Venezuela Bolivar Official Currency Exchange Rate To Dollar
Charges And Credits [Line Items]
Exchange rate | VEF / $			6.3					6.3		6.3	4.3
Venezuela Bolivar Official Currency Exchange Rate To Dollar | SICAD I
Charges And Credits [Line Items]
Exchange rate, approximated | VEF / $			11					11
Venezuela Bolivar Official Currency Exchange Rate To Dollar | SICAD II
Charges And Credits [Line Items]
Exchange rate, approximated | VEF / $			50					50
Certain intangible assets
Charges And Credits [Line Items]
Impairment charge, Pretax								$ 85
Current Market Conditions
Charges And Credits [Line Items]
Impairment and restructuring charges	$ 84
Other Than Temporary Impairment Of Marketable Securities
Charges And Credits [Line Items]
Impairment and restructuring charges	40
Equity Method Investments
Charges And Credits [Line Items]
Impairment and restructuring charges	15
Lease termination costs
Charges And Credits [Line Items]
Impairment and restructuring charges	177
Provision For Accounts Receivable
Charges And Credits [Line Items]
Charges and credits, Pretax									152
Charges and credits, Net									122
Explorer-class vessels
Charges And Credits [Line Items]
Impairment charge, Pretax								590
Explorer-class vessels | Eastern Echo Holdings Plc.
Charges And Credits [Line Items]
Impairment charge, Pretax								$ 590
Number of vessels acquired | Vessel								6
Other seismic assets | Lease termination costs
Charges And Credits [Line Items]
Restructuring, other pretax charge								$ 131
Lower-Tier Drilling Rigs | Pressure Pumping And Other Equipment | North America
Charges And Credits [Line Items]
Impairment and restructuring charges	776
Workforce reduction
Charges And Credits [Line Items]
Restructuring and other charges	530	$ 390					$ 360
Inventory Write Down | North America
Charges And Credits [Line Items]
Impairment and restructuring charges	269
Impairment of SPM Project
Charges And Credits [Line Items]
Impairment and restructuring charges	182
Geopolitical Events | Middle East
Charges And Credits [Line Items]
Impairment and restructuring charges	77
Contract termination costs
Charges And Credits [Line Items]
Impairment and restructuring charges	$ 41
Currency Devaluation Loss In Venezuela
Charges And Credits [Line Items]
Restructuring and other charges		$ 49	$ 472
Charges and credits, Pretax									92
Charges and credits, Net									92
Cost Of Revenue | Provision For Accounts Receivable
Charges And Credits [Line Items]
Charges and credits, Pretax				$ 152
Gain On Formation Of OneSubsea Joint Venture
Charges And Credits [Line Items]
Charges and credits, Pretax									(1,028)
Charges and credits, Net									(1,028)
Gain On Formation Of OneSubsea Joint Venture | Gain on formation of OneSubsea
Charges And Credits [Line Items]
Charges and credits, Pretax					$ 1,028
Charges and credits, Net					1,028
Impairment Of Equity Method Investments
Charges And Credits [Line Items]
Charges and credits, Pretax									364
Charges and credits, Net									$ 345
Impairment Of Equity Method Investments | Drilling Related Technology
Charges And Credits [Line Items]
Charges and credits, Pretax					222
Impairment Of Equity Method Investments | Contract Drilling
Charges And Credits [Line Items]
Charges and credits, Pretax					$ 142
Other Restructuring
Charges And Credits [Line Items]
Devaluation charge						$ 92

Charges and Credits - Summary o

Charges and Credits - Summary of Charges (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investment In Joint Venture [Line Items]
Charges and credits, Pretax			$ (420)
Charges and credits, Tax			49
Charges and credits, Net			(469)
Currency Devaluation Loss In Venezuela
Investment In Joint Venture [Line Items]
Charges and credits, Pretax			92
Charges and credits, Net			92
Gain On Formation Of OneSubsea Joint Venture
Investment In Joint Venture [Line Items]
Charges and credits, Pretax			(1,028)
Charges and credits, Net			(1,028)
Impairment Of Equity Method Investments
Investment In Joint Venture [Line Items]
Charges and credits, Pretax			364
Charges and credits, Tax			19
Charges and credits, Net			345
Impairment And Other
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	$ 2,575	$ 1,773
Charges and credits, Tax	357	134
Charges and credits, Net	2,218	1,639
Impairment And Other | Workforce reduction
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	920	296
Charges and credits, Tax	107	37
Charges and credits, Net	813	259
Impairment And Other | Fixed asset impairments
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	776
Charges and credits, Tax	141
Charges and credits, Net	635
Impairment And Other | Inventory Write Down
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	269
Charges and credits, Tax	27
Charges and credits, Net	242
Impairment And Other | Impairment of SPM Project
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	182	199
Charges and credits, Tax	36	72
Charges and credits, Net	146	127
Impairment And Other | Facility closures
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	177
Charges and credits, Tax	37
Charges and credits, Net	140
Impairment And Other | Geopolitical Events
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	77
Charges and credits, Net	77
Impairment And Other | Currency Devaluation Loss In Venezuela
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	49	472
Charges and credits, Net	49	472
Impairment And Other | Contract termination costs
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	41
Charges and credits, Tax	2
Charges and credits, Net	39
Impairment And Other | Other Restructuring
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	84
Charges and credits, Tax	7
Charges and credits, Net	$ 77
Impairment And Other | WesternGeco restructuring
Investment In Joint Venture [Line Items]
Charges and credits, Pretax		806
Charges and credits, Tax		25
Charges and credits, Net		$ 781
Provision For Accounts Receivable
Investment In Joint Venture [Line Items]
Charges and credits, Pretax			152
Charges and credits, Tax			30
Charges and credits, Net			$ 122

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Gain on formation of OneSubsea				$ 1,028
Acquisitions and investments, net of cash acquired		$ 443	$ 1,008	1,210
One Subsea
Business Acquisition [Line Items]
Purchase price	$ 600
Ownership interest in joint venture		40.00%
Gain on formation of OneSubsea	$ 1,028
Other Acquisitions
Business Acquisition [Line Items]
Acquisitions and investments, net of cash acquired		$ 443	$ 1,008	$ 610
Shares of common stock issued in connection with acquisition			2.1
Value of common stock issued in connection with acquisition			$ 213

Inventories - Inventory Disclos

Inventories - Inventory Disclosure (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials & field materials	$ 2,300	$ 2,666
Work in progress	178	273
Finished goods	1,278	1,689
Inventories	$ 3,756	$ 4,628

Fixed Assets - Property, Plant

Fixed Assets - Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 37,120	$ 36,964
Less: Accumulated depreciation	23,705	21,568
Fixed assets less accumulated depreciation	13,415	15,396	$ 15,096
Land
Property Plant And Equipment [Line Items]
Property, plant and equipment	425	445
Building and Building Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment	3,960	3,733
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment	31,885	31,937
Seismic Vessels
Property Plant And Equipment [Line Items]
Property, plant and equipment	$ 850	$ 849

Fixed Assets - Additional Infor

Fixed Assets - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property Plant And Equipment [Line Items]
Depreciation expense relating to fixed assets	$ 3.2	$ 3.2	$ 3.1
Building and Building Improvements | Minimum
Property Plant And Equipment [Line Items]
Useful Life	25 years
Building and Building Improvements | Maximum
Property Plant And Equipment [Line Items]
Useful Life	30 years
Machinery and Equipment | Minimum
Property Plant And Equipment [Line Items]
Useful Life	5 years
Machinery and Equipment | Maximum
Property Plant And Equipment [Line Items]
Useful Life	10 years
Seismic Vessels | Minimum
Property Plant And Equipment [Line Items]
Useful Life	20 years
Seismic Vessels | Maximum
Property Plant And Equipment [Line Items]
Useful Life	30 years

Multiclient Seismic Data - Mult

Multiclient Seismic Data - Multiclient Seismic Data Table (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Multiclient Seismic Data [Abstract]
Opening balance	$ 793	$ 667
Capitalized in period	486	321
Charged to expense	(253)	(195)
Ending balance	$ 1,026	$ 793

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 15,487	$ 14,706
Acquisitions	244	837
Impact of changes in exchange rates	(126)	(56)
Goodwill, Ending Balance	15,605	15,487
Operating Segments | Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	3,812	3,737
Acquisitions	38	15
Reallocation		83
Impact of changes in exchange rates	(52)	(23)
Goodwill, Ending Balance	3,798	3,812
Operating Segments | Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	8,488	8,315
Acquisitions	130	271
Reallocation		(83)
Impact of changes in exchange rates	(34)	(15)
Goodwill, Ending Balance	8,584	8,488
Operating Segments | Production
Goodwill [Line Items]
Goodwill, Beginning Balance	3,187	2,654
Acquisitions	76	551
Impact of changes in exchange rates	(40)	(18)
Goodwill, Ending Balance	$ 3,223	$ 3,187

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 6,491	$ 6,299
Accumulated Amortization	1,922	1,645
Net Book Value	4,569	4,654
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	2,489	2,531
Accumulated Amortization	645	523
Net Book Value	1,844	2,008
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,864	1,747
Accumulated Amortization	653	535
Net Book Value	1,211	1,212
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,625	1,641
Accumulated Amortization	367	319
Net Book Value	1,258	1,322
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	513	380
Accumulated Amortization	257	268
Net Book Value	$ 256	$ 112

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Finite Lived Intangible Assets [Line Items]
Estimated amortization charged to income, 2016	$ 373
Estimated amortization charged to income, 2017	365
Estimated amortization charged to income, 2018	357
Estimated amortization charged to income, 2019	341
Estimated amortization charged to income, 2020	319
Amortization expense	$ 354	$ 344	$ 330
Customer Relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Amortization period	18 years
Customer Relationships | Maximum
Finite Lived Intangible Assets [Line Items]
Amortization period	28 years
Technology/Technical Know-How | Minimum
Finite Lived Intangible Assets [Line Items]
Amortization period	10 years
Technology/Technical Know-How | Maximum
Finite Lived Intangible Assets [Line Items]
Amortization period	18 years
Tradenames | Minimum
Finite Lived Intangible Assets [Line Items]
Amortization period	15 years
Tradenames | Maximum
Finite Lived Intangible Assets [Line Items]
Amortization period	30 years

Long-term Debt and Debt Facil60

Long-term Debt and Debt Facility Agreements - Long-term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 14,442	$ 10,565
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,000	1,538
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,741
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,597	1,597
3.00% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,591
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,496	1,495
2.35% Senior Notes due 2018
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,297
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,100	1,100
1.25% Senior Notes due 2017
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,000	1,000
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	999	999
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	845
1.50% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Long-term debt, carrying amount	566	628
1.90% Senior Notes due 2017
Debt Instrument [Line Items]
Long-term debt, carrying amount	499
1.95% Senior Notes due 2016
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,100
2.65% Senior Notes due 2016
Debt Instrument [Line Items]
Long-term debt, carrying amount		500
Other
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 711	$ 608

Long-term Debt and Debt Facil61

Long-term Debt and Debt Facility Agreements - Long-term Debt (Parenthetical) (Detail) - EUR (€) € in Billions	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate		4.00%	4.00%
Debt instrument maturity date		2,025	2,025
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		3.30%	3.30%
Debt instrument maturity date		2,021	2,021
3.00% Senior Notes due 2020
Debt Instrument [Line Items]
Debt instrument interest rate		3.00%	3.00%
Debt instrument maturity date		2,020	2,020
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Debt instrument interest rate		3.65%	3.65%
Debt instrument maturity date		2,023	2,023
2.35% Senior Notes due 2018
Debt Instrument [Line Items]
Debt instrument interest rate		2.35%	2.35%
Debt instrument maturity date		2,018	2,018
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		4.20%	4.20%
Debt instrument maturity date		2,021	2,021
1.25% Senior Notes due 2017
Debt Instrument [Line Items]
Debt instrument interest rate		1.25%	1.25%
Debt instrument maturity date		2,017	2,017
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate		2.40%	2.40%
Debt instrument maturity date		2,022	2,022
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate		3.63%	3.63%
Debt instrument maturity date		2,022	2,022
1.50% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate	1.50%	1.50%	1.50%
Debt instrument maturity date	2,019	2,019	2,019
Guaranteed notes face amount	€ 0.5
Long-term debt, carrying amount	€ 0.5
Senior note floating interest rate		three-month LIBOR plus approximately 64 basis points.
1.50% Guaranteed Notes due 2019 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis points	0.64%
1.90% Senior Notes due 2017
Debt Instrument [Line Items]
Debt instrument interest rate		1.90%	1.90%
Debt instrument maturity date		2,017	2,017
1.95% Senior Notes due 2016
Debt Instrument [Line Items]
Debt instrument interest rate		1.95%	1.95%
Debt instrument maturity date		2,016	2,016
2.65% Senior Notes due 2016
Debt Instrument [Line Items]
Debt instrument interest rate		2.65%	2.65%
Debt instrument maturity date		2,016	2,016
Effective interest rate on euro denominated debt			2.39%
Cameron Merger Agreement
Debt Instrument [Line Items]
Debt instrument redemption description		If the closing of the Cameron merger does not occur on or prior to August 25, 2016 (which may be extended to November 25, 2016 under certain circumstances) or if the Cameron merger agreement is terminated at any time prior thereto, these notes will be subject to a special mandatory redemption. The special mandatory redemption price will be equal to 101% of the aggregate principal amount of the notes that are redeemed, plus accrued and unpaid interest.
Debt instrument, redemption price percentage		101.00%
Euro Medium Term Note Program
Debt Instrument [Line Items]
Guaranteed notes face amount		€ 5

Long-term Debt and Debt Facil62

Long-term Debt and Debt Facility Agreements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Investment in subsidiary-Schlumberger Investment SA	100.00%
Committed debt facility agreement aggregated	$ 3,800
Unused debt facility	1,400
Long-term debt - current portion	3,011	$ 1,244
Long-term debt, carrying amount	$ 14,442	10,565
Weighted average interest rate on variable rate debt	1.00%
Long-term Debt maturity in 2017	$ 1,500
Long-term Debt maturity in 2018	2,600
Long-term Debt maturity in 2019	900
Long-term Debt maturity in 2020	1,600
Long-term Debt maturity in 2021	2,700
Long-term Debt maturity in 2022	1,900
Long-term Debt maturity in 2023	1,500
Long-term Debt maturity in 2025	1,700
Long-term debt, fair value	14,400	10,700
Commercial paper borrowings
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	3,500
Long-term debt - current portion	1,400	1.5
Long-term debt, carrying amount	1,000	$ 1,538
Long-term debt	2,400
Commercial paper programs mature in July 2016
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	250
Commercial paper programs mature in July 2018
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	1,750
Commercial paper programs mature in November 2018
Debt Instrument [Line Items]
Committed debt facility agreement aggregated	$ 1,500

Derivative Instruments and He63

Derivative Instruments and Hedging Activities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)Country	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Dec. 31, 2013EUR (€)
Derivative [Line Items]
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps	$ 13,800,000,000
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps	5,200,000,000
Short-term investments and fixed income investments, held to maturity	$ 10,700,000,000
Number of countries in which Schlumberger conducts business | Country	85
Percentage of revenue denominated in domestic currency	83.00%
Recognized a cumulative net (loss) in Accumulated other comprehensive loss relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges	$ (39,000,000)
Transaction losses of hedging activities	$ 27,000,000	$ 67,000,000	$ 24,000,000
1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Guaranteed notes face amount | €				€ 500,000,000
Cross currency swap
Derivative [Line Items]
Notional amount of interest rate swap | €				€ 500,000,000
Fixed Rate Debt | 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Derivative swap interest rate				1.50%
Floating Rate Debt | 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Floating interest rate on securities	three-month LIBOR plus approximately 64 basis points
Foreign exchange contracts
Derivative [Line Items]
Notional amount of interest rate swap	$ 3,800,000,000
Foreign exchange contracts | Debt | Derivatives designated as hedges
Derivative [Line Items]
Notional amount of interest rate swap	$ 1,200,000,000
London Interbank Offered Rate (LIBOR) | Floating Rate Debt | 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Basis point	0.64%

Derivative Instruments and He64

Derivative Instruments and Hedging Activities - Fair Values of Outstanding Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivative Assets
Derivative Assets	$ 25	$ 40
Derivatives designated as hedges
Derivative Assets
Derivative Assets	10	35
Derivative Liabilities
Derivative Liabilities	62	227
Derivatives not designated as hedges
Derivative Liabilities
Derivative Liabilities	87	255
Foreign exchange contracts | Derivatives designated as hedges | Other current assets
Derivative Assets
Derivative Assets	4	3
Foreign exchange contracts | Derivatives designated as hedges | Other Assets
Derivative Assets
Derivative Assets	6	32
Foreign exchange contracts | Derivatives designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	37	80
Foreign exchange contracts | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	3	105
Foreign exchange contracts | Derivatives not designated as hedges | Other current assets
Derivative Assets
Derivative Assets	15	5
Foreign exchange contracts | Derivatives not designated as hedges | Accounts payable and accrued liabilities
Derivative Liabilities
Derivative Liabilities	25	28
Cross currency swap | Derivatives designated as hedges | Other Liabilities
Derivative Liabilities
Derivative Liabilities	$ 22	$ 42

Derivative Instruments and He65

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) - Cash Flow Hedging - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivatives designated as hedges | Cross currency swap | Interest expense
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ (64)	$ (82)	$ 15
Derivatives not designated as hedges | Foreign exchange contracts | Cost of revenue
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ (154)	$ (95)	$ (2)

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Common stock, shares authorized	4,500,000,000
Common stock, par value	$ 0.01
Common stock, shares outstanding	1,256,367,980	1,275,312,404
Preferred stock, shares authorized	200,000,000
Preferred stock, par value	$ 0.01
Preferred stock, issued	0
Other comprehensive income (loss)	$ (352)	$ (1,652)	$ 1,334

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	$ (4,206)	$ (2,554)	$ (3,888)
Other comprehensive income (loss) before reclassifications	(960)	(2,152)	1,261
Amounts reclassified from accumulated other comprehensive loss	682	418	375
Income taxes	(74)	82	(302)
Ending Balance	(4,558)	(4,206)	(2,554)
Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(1,531)	(1,068)	(917)
Other comprehensive income (loss) before reclassifications	(522)	(463)	(151)
Ending Balance	(2,053)	(1,531)	(1,068)
Unrealized Gain/(Loss) on Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	10	176	141
Other comprehensive income (loss) before reclassifications	(50)	(166)	35
Amounts reclassified from accumulated other comprehensive loss	40
Ending Balance		10	176
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(96)	29	30
Other comprehensive income (loss) before reclassifications	(178)	(238)	49
Amounts reclassified from accumulated other comprehensive loss	235	113	(50)
Ending Balance	(39)	(96)	29
Pension and Other Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning Balance	(2,589)	(1,691)	(3,142)
Other comprehensive income (loss) before reclassifications	(210)	(1,285)	1,328
Amounts reclassified from accumulated other comprehensive loss	407	305	425
Income taxes	(74)	82	(302)
Ending Balance	$ (2,466)	$ (2,589)	$ (1,691)

Stock-based Compensation Plan68

Stock-based Compensation Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate intrinsic value of stock options outstanding	$ 93
Aggregate intrinsic value of stock options exercisable	93
Total intrinsic value of options exercised	62	$ 314	$ 176
Total unrecognized compensation cost related to nonvested stock-based compensation arrangements	480
Expected to be recognized in 2016	215
Expected to be recognized in 2017	137
Expected to be recognized in 2018	80
Expected to be recognized in 2019	40
Expected to be recognized in 2020	$ 8
Future Grants Shares	27,000,000
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option maximum term	10 years
Stock options vesting period	Four or Five Years
Weighted average remaining contractual life of stock options exercisable, in years	4 years 4 months 24 days
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance period to determine shares earned	3 years
Performance shares outstanding	900,000
Performance Shares | Scenario Return On Capital Employed Exceeds Predefined Target | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares to be granted as a percentage of total target award	250.00%
Performance Shares | Scenario Return On Capital Employed Falls Below Threshold
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares to be granted	0
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares to be granted	1,254,000	1,341,000	1,949,000
Performance shares outstanding	3,571,000	4,138,000	4,171,000	3,566,000
Restricted stock awards, vesting period			3 years
DSPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Percentage purchase price of stock lower of stock price at beginning or end of plan period at specified intervals	92.50%

Stock-based Compensation Plan69

Stock-based Compensation Plans - Weighted-Average Assumptions (Detail) - Employee Stock Option - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	2.30%	1.60%	1.70%
Expected volatility	36.00%	37.00%	38.00%
Risk free interest rate	1.70%	2.20%	1.20%
Expected option life in years	7 years	7 years	7 years
Weighted-average fair value per share	$ 25.96	$ 34.20	$ 23.93

Stock-based Compensation Plan70

Stock-based Compensation Plans - Options Outstanding and Option Exercisable (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2015$ / sharesshares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Options Outstanding | shares	41,087
Weighted-average remaining contractual life (in years)	6 years 1 month 6 days
Weighted- average exercise price	$ 78.73
Options Exercisable | shares	22,370
Weighted-average exercise price	$ 73.79
Exercise prices range $37.85 - $67.87
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	37.85
Exercise prices maximum range	$ 67.87
Options Outstanding | shares	4,882
Weighted-average remaining contractual life (in years)	2 years 6 months
Weighted- average exercise price	$ 51.61
Options Exercisable | shares	4,857
Weighted-average exercise price	$ 51.53
Exercise prices range $68.51 - $70.93
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	68.51
Exercise prices maximum range	$ 70.93
Options Outstanding | shares	7,499
Weighted-average remaining contractual life (in years)	5 years 7 months 6 days
Weighted- average exercise price	$ 69.81
Options Exercisable | shares	4,873
Weighted-average exercise price	$ 69.26
Exercise prices range $72.11 - $78.31
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	72.11
Exercise prices maximum range	$ 78.31
Options Outstanding | shares	8,927
Weighted-average remaining contractual life (in years)	7 years
Weighted- average exercise price	$ 73.56
Options Exercisable | shares	3,206
Weighted-average exercise price	$ 72.51
Exercise prices range $83.88 - $84.93
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	83.88
Exercise prices maximum range	$ 84.93
Options Outstanding | shares	7,585
Weighted-average remaining contractual life (in years)	4 years 4 months 24 days
Weighted- average exercise price	$ 84.17
Options Exercisable | shares	6,514
Weighted-average exercise price	$ 84.21
Exercise prices range $88.61 - $114.83
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	88.61
Exercise prices maximum range	$ 114.83
Options Outstanding | shares	12,194
Weighted-average remaining contractual life (in years)	8 years
Weighted- average exercise price	$ 95.48
Options Exercisable | shares	2,920
Weighted-average exercise price	$ 96.55

Stock-based Compensation Plan71

Stock-based Compensation Plans - Summary of Stock Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Beginning balance, shares	38,583	41,939	42,059
Granted, shares	7,118	6,105	6,570
Exercised, shares	(2,561)	(8,269)	(5,168)
Forfeited, shares	(2,053)	(1,192)	(1,522)
Ending balance, shares	41,087	38,583	41,939
Beginning balance, Weighted-average exercise price	$ 76.10	$ 70.33	$ 67.77
Granted, Weighted-average exercise price	86.86	99.04	72.16
Exercised, Weighted-average exercise price	60.10	64.19	51.73
Forfeited, Weighted-average exercise price	80.34	73.56	70.57
Ending balance, Weighted-average exercise price	$ 78.73	$ 76.10	$ 70.33

Stock-based Compensation Plan72

Stock-based Compensation Plans - Restricted Stock Transactions (Detail) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested at beginning of year, Restricted Stock	4,138	4,171	3,566
Performance shares to be granted	1,254	1,341	1,949
Vested, Restricted Stock	(1,495)	(1,186)	(958)
Forfeited, Restricted Stock	(326)	(188)	(386)
Unvested at end of year, Restricted Stock	3,571	4,138	4,171
Unvested at beginning of year, Weighted Average Grant Date Fair Value	$ 80.80	$ 76.01	$ 73.62
Granted, Weighted Average Grant Date Fair Value	82.37	96.08	75.65
Vested, Weighted Average Grant Date Fair Value	71.30	81.59	66.98
Forfeited, Weighted Average Grant Date Fair Value	83.86	78.68	74.53
Unvested at end of year, Weighted Average Grant Date Fair Value	$ 85.04	$ 80.80	$ 76.01

Stock-based Compensation Plan73

Stock-based Compensation Plans - Discounted Stock Purchase Plan Assumptions and Resulting Weighted Average Fair Value (Detail) - DSPP - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	2.30%	1.60%	1.70%
Expected volatility	27.00%	19.00%	24.00%
Risk free interest rate	0.20%	0.10%	0.10%
Weighted-average fair value per share	$ 12.45	$ 12.67	$ 9.91

Stock-based Compensation Plan74

Stock-based Compensation Plans - Stock-Based Compensation Expense Recognized in Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 326	$ 329	$ 315
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	176	177	165
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	107	114	110
DSPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 43	$ 38	$ 40

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)Jurisdictions	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Income Tax Disclosure [Line Items]
Minimum number of jurisdictions to Schlumberger operates | Jurisdictions	100
US federal statutory rate	35.00%	35.00%	35.00%
Restructuring and other charges	$ 2,575	$ 1,773	$ 420
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	162	190
Accrued interest and penalties	176	243	253
Domestic Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	883	289	53
Foreign Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	$ 1,692	$ 1,484	$ 473
Minimum
Income Tax Disclosure [Line Items]
US federal statutory rate	0.00%
Maximum
Income Tax Disclosure [Line Items]
US federal statutory rate	40.00%

Income Taxes - Income from Cont

Income Taxes - Income from Continuing Operations Before Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Income before taxes, United States	$ (691)	$ 1,990	$ 1,904
Income before taxes, Outside United States	3,572	5,649	6,787
Income from continuing operations before taxes	$ 2,881	$ 7,639	$ 8,691

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Postretirement benefits	$ 266	$ 327
Intangible assets	(1,418)	(1,435)
Investments in non-US subsidiaries	(152)	(227)
Fixed assets, net	(176)	(331)
Inventories	159	112
Other, net	454	402
Net deferred tax assets (liabilities)	$ (867)	$ (1,152)

Income Taxes - Components of Co

Income Taxes - Components of Consolidated Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
United States-Federal	$ 90	$ 718	$ 682
United States-State	12	51	60
Outside United States	1,085	1,380	1,211
Current Income Tax Expense (Benefit), Total	1,187	2,149	1,953
Deferred:
United States-Federal	(356)	(194)	(109)
United States-State	(19)	(9)	(4)
Outside United States	(52)	(12)	34
Valuation allowance	(14)	(6)	(26)
Deferred income taxes	(441)	(221)	(105)
Consolidated taxes on income	$ 746	$ 1,928	$ 1,848

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of US Statutory Federal Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
US federal statutory rate	35.00%	35.00%	35.00%
Non-US income taxed at different rates	(13.00%)	(11.00%)	(12.00%)
Other	(2.00%)	(2.00%)
Effective income tax rate	26.00%	25.00%	21.00%
Charges And Credits
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
Charges and credits (See Note 3)	6.00%	3.00%	(2.00%)

Income Taxes - Reconciliation80

Income Taxes - Reconciliation of Liabilities Associated with Uncertain Tax Provisions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 1,402	$ 1,452	$ 1,453
Additions based on tax positions related to the current year	140	154	146
Additions for tax positions of prior years	136	96	109
Additions related to acquisitions	5	43
Impact of changes in exchange rates	(78)	(62)	(47)
Settlements with tax authorities	(99)	(27)	(64)
Reductions for tax positions of prior years	(203)	(212)	(109)
Reductions due to the lapse of the applicable statute of limitations	(18)	(42)	(36)
Balance at end of year	$ 1,285	$ 1,402	$ 1,452

Income Taxes - Tax Years Subjec

Income Taxes - Tax Years Subject to Examination by Tax Authorities (Detail)	12 Months Ended
	Dec. 31, 2015
Brazil
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2010 - 2015
Canada
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2008 - 2015
Ecuador
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2012 - 2015
Mexico
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2007 - 2015
Norway
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2013 - 2015
Russia
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2013 - 2015
Saudi Arabia
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2001 - 2015
United Kingdom
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2011 - 2015
United States
Disclosure Income Tax Components Of Consolidated Income Taxes Detail [Line Items]
Income tax examination, year(s) under examination	2014 - 2015

Leases and Lease Commitments -

Leases and Lease Commitments - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Leases [Abstract]
Total rental expense	$ 1.6	$ 2.1	$ 1.9

Leases and Lease Commitments 83

Leases and Lease Commitments - Future Minimum Rental Commitments Under Noncancelable Operating Leases (Detail) $ in Millions	Dec. 31, 2015USD ($)
Leases [Abstract]
2,016	$ 261
2,017	205
2,018	162
2,019	145
2,020	129
Thereafter	526
Total	$ 1,428

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue		$ 35,475	$ 48,580	$ 45,266
Income before Taxes		2,881	7,639	8,691
Assets		68,005	66,904	67,100
Depreciation and amortization	[1]	4,078	4,094	3,879
Capital Expenditures		2,410	3,976	3,943
Pretax operating income		6,510	10,576	9,344
Interest		346	369	391
Restructuring and other charges		2,575	1,773	420
Operating Segments
Segment Reporting Information [Line Items]
Revenue		35,475	48,580	45,266
Interest income		22	20	11
Interest		30	22	22
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		9,501	12,905	13,050
Income before Taxes		2,450	3,708	3,711
Assets		8,266	9,191	9,316
Depreciation and amortization		1,279	1,459	1,402
Capital Expenditures		649	1,207	1,361
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		13,563	18,128	16,792
Income before Taxes		2,538	3,805	3,238
Assets		8,535	11,155	10,440
Depreciation and amortization		1,177	1,173	1,076
Capital Expenditures		672	1,328	1,289
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		12,548	17,763	15,646
Income before Taxes		1,585	3,193	2,624
Assets		9,937	11,481	10,929
Depreciation and amortization		1,216	1,066	1,001
Capital Expenditures		825	1,192	1,126
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(137)	(216)	(222)
Income before Taxes		(63)	(130)	(229)
Assets		2,067	1,572	2,332
Depreciation and amortization		213	198	192
Capital Expenditures		264	249	167
Material Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	[2]	193	198	208
Goodwill and intangible assets		20,174	20,141	19,415
All other assets		2,262	2,186	2,618
Corporate & other	[2]	(768)	(848)	(726)
Corporate & other	[2]	11,178	11,178	12,050
Interest income	[3]	30	31	22
Interest	[4]	(316)	(347)	(369)
Restructuring and other charges	[5]	$ (2,575)	$ (1,773)	$ 420
[1]	Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.
[2]	Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. Corporate assets consist of cash, short-term investments, fixed income investments, held to maturity and investments in affiliates.
[3]	Interest income excludes amounts which are included in the segments’ income (2015: $22 million; 2014: $20 million; 2013: $11 million).
[4]	Interest expense excludes amounts which are included in the segments’ income (2015: $30 million; 2014: $22 million; 2013: $22 million).
[5]	See Note 3 – Charges and Credits.

Segment Information - Schedul85

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Interest expense	$ 346	$ 369	$ 391
Operating Segments
Segment Reporting Information [Line Items]
Interest income	22	20	11
Interest expense	$ 30	$ 22	$ 22

Segment Information - Revenue b

Segment Information - Revenue by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 35,475	$ 48,580	$ 45,266
Operating Segments
Segment Reporting Information [Line Items]
Revenue	35,475	48,580	45,266
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	9,811	16,151	13,897
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Revenue	6,014	7,699	7,754
Operating Segments | Europe/CIS/Africa
Segment Reporting Information [Line Items]
Revenue	9,284	12,515	12,411
Operating Segments | Middle East & Asia
Segment Reporting Information [Line Items]
Revenue	9,898	11,875	10,767
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	$ 468	$ 340	$ 437

Segment Information - Additiona

Segment Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 35,475	$ 48,580	$ 45,266
United States
Segment Reporting Information [Line Items]
Revenue	$ 8,500	$ 14,000	$ 12,000
Sales Revenue, Segment
Segment Reporting Information [Line Items]
Maximum percentage of consolidated revenue customers	10.00%	10.00%	10.00%

Segment Information - Fixed Ass

Segment Information - Fixed Assets Less Accumulated Depreciation by Geographic Area (Detail) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Fixed Assets less accumulated depreciation		$ 13,415	$ 15,396	$ 15,096
Operating Segments | North America
Segment Reporting Information [Line Items]
Fixed Assets		4,392	4,885	4,858
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Fixed Assets		1,728	1,969	1,889
Operating Segments | Europe
Segment Reporting Information [Line Items]
Fixed Assets		2,978	3,640	3,452
Operating Segments | Middle East & Asia
Segment Reporting Information [Line Items]
Fixed Assets		3,078	3,446	2,991
Unallocated
Segment Reporting Information [Line Items]
Fixed Assets	[1]	$ 1,239	$ 1,456	$ 1,906
[1]	Represents seismic vessels, including the related on-board equipment, which frequently transition between geographic areas.

Pension and Other Benefit Pla89

Pension and Other Benefit Plans - Weighted-Average Assumed Discount Rate, Compensation Increases and Expected Long-Term Rate of Return on Plan Assets Used to Determine Net Pension Cost for US and International Plans (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.50%	4.15%
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.15%	4.85%	4.25%
Compensation increases	4.00%	4.00%	4.00%
Return on plan assets	7.25%	7.25%	7.50%
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.07%	4.76%	4.38%
Compensation increases	4.79%	4.80%	4.83%
Return on plan assets	7.50%	7.50%	7.50%

Pension and Other Benefit Pla90

Pension and Other Benefit Plans - Net Pension Cost for Schlumberger Pension Plans and US Postretirement Medical Plan (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 86	$ 72	$ 80
Interest cost on projected benefit obligation and on accumulated postretirement benefit obligation	170	164	150
Expected return on plan assets	(229)	(208)	(200)
Amortization of prior service cost	12	12	12
Amortization of net loss	123	82	122
Total pension cost	162	122	164
International
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	167	126	127
Interest cost on projected benefit obligation and on accumulated postretirement benefit obligation	297	288	253
Expected return on plan assets	(498)	(450)	(384)
Amortization of prior service cost	121	120	117
Amortization of net loss	170	94	155
Total pension cost	257	178	268
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	42	43	48
Interest cost on projected benefit obligation and on accumulated postretirement benefit obligation	48	60	56
Expected return on plan assets	(52)	(45)	(37)
Amortization of prior service cost	(32)	(4)	(4)
Amortization of net loss	13	1	23
Total pension cost	$ 19	$ 55	$ 86

Pension and Other Benefit Pla91

Pension and Other Benefit Plans - Weighted-Average Assumed Discount Rate and Compensation Increases Used to Determine Projected Benefit Obligations for US and International Plans (Detail)	Dec. 31, 2015	Dec. 31, 2014
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.50%	4.15%
Compensation increases	4.00%	4.00%
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.36%	4.07%
Compensation increases	4.80%	4.79%

Pension and Other Benefit Pla92

Pension and Other Benefit Plans - Changes in Projected Benefit Obligation, Plan Assets and Funded Status of Plans (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amounts Recognized in Balance Sheet
Postretirement Benefits	$ (1,434)	$ (1,501)
US Plan Assets
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	4,137	3,418
Service cost	86	72	$ 80
Interest cost	170	164	150
Actuarial (gains) losses	(205)	627
Benefits paid	(163)	(144)
Projected benefit obligation at end of year	4,025	4,137	3,418
Change in Plan Assets
Plan assets at fair value at beginning of year	3,549	3,269
Actual return on plan assets	(1)	339
Company contributions	82	85
Benefits paid	(163)	(144)
Plan assets at fair value at end of year	3,467	3,549	3,269
Unfunded Liability	(558)	(588)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(558)	(588)
Total of post retirement benefits	(558)	(588)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial (gains) losses	1,008	1,104
Prior service cost	54	66
Total amount recognized in accumulated other comprehensive income	1,062	1,170
Accumulated benefit obligation	3,763	3,805
International
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	7,249	5,981
Service cost	167	126	127
Interest cost	297	288	253
Contribution by plan participants	143	122
Actuarial (gains) losses	(203)	1,000
Currency effect	(66)	(90)
Benefits paid	(247)	(178)
Projected benefit obligation at end of year	7,340	7,249	5,981
Change in Plan Assets
Plan assets at fair value at beginning of year	6,830	6,246
Actual return on plan assets	(4)	502
Currency effect	(69)	(102)
Company contributions	198	240
Contributions by plan participants	125	122
Benefits paid	(248)	(178)
Plan assets at fair value at end of year	6,832	6,830	$ 6,246
Unfunded Liability	(508)	(419)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(657)	(546)
Other Assets	149	127
Total of post retirement benefits	(508)	(419)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial (gains) losses	335	1,658
Prior service cost		357
Total amount recognized in accumulated other comprehensive income	335	2,015
Accumulated benefit obligation	$ 6,913	$ 6,793

Pension and Other Benefit Pla93

Pension and Other Benefit Plans - Weighted-Average Allocation of Plan Assets and Target Allocation by Asset Category (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target allocation of assets	100.00%	100.00%
Target Allocation Percentage of Assets, Total	100.00%	100.00%
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target allocation of assets	100.00%	100.00%
Target Allocation Percentage of Assets, Total	100.00%	100.00%
Equity securities | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	37.00%
Target Allocation Percentage of Assets, Range Maximum	56.00%
Target allocation of assets	52.00%	48.00%
Equity securities | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	45.00%
Target Allocation Percentage of Assets, Range Maximum	71.00%
Target allocation of assets	64.00%	58.00%
Debt securities | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	35.00%
Target Allocation Percentage of Assets, Range Maximum	62.00%
Target allocation of assets	36.00%	42.00%
Debt securities | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	20.00%
Target Allocation Percentage of Assets, Range Maximum	35.00%
Target allocation of assets	27.00%	32.00%
Cash and cash equivalents | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	3.00%
Target allocation of assets	2.00%	5.00%
Cash and cash equivalents | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	5.00%
Target allocation of assets	2.00%	4.00%
Alternative investments | US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	10.00%
Target allocation of assets	10.00%	8.00%
Alternative investments | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Target Allocation Percentage of Assets, Range Minimum	0.00%
Target Allocation Percentage of Assets, Range Maximum	25.00%
Target allocation of assets	7.00%	6.00%

Pension and Other Benefit Pla94

Pension and Other Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Frequency of asset performance monitored, years	5 years
Anticipated contributions to postretirement benefit plans	$ 350
Expenses for deferred benefit programs	$ 565	$ 749	$ 671
US Employees Postretirement Benefits Other Than Pensions
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Retirement coverage plan, description	During the fourth quarter of 2014 Schlumberger announced that, effective April 1, 2015, it will change the way it provides healthcare coverage to certain retirees who are age 65 and over. Under the amended plan, these retirees transferred to individual coverage under the Medicare Exchange. Schlumberger will subsidize the cost of the program by providing these retirees with a Health Reimbursement Account. The annual subsidy may be increased based on medical cost inflation, but it will not be increased more than 5% in any given year.
US Employees Postretirement Benefits Other Than Pensions | Maximum
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Compensation increases	5.00%
Postretirement medical plan | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Investment of assets in government and government-related debt securities under US postretirement medical plan	40.00%
Postretirement medical plan | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Investment of assets in government and government-related debt securities under US postretirement medical plan	60.00%

Pension and Other Benefit Pla95

Pension and Other Benefit Plans - Fair Value of Schlumberger's Pension Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	$ 3,467	$ 3,549	$ 3,269
US Plan Assets | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	86	59
US Plan Assets | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	605	552
US Plan Assets | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	599	654
US Plan Assets | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	589	735
US Plan Assets | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	65	107
US Plan Assets | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	203	210
US Plan Assets | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	125	83
US Plan Assets | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,195	1,149
US Plan Assets | Level One
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,327	1,270
US Plan Assets | Level One | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	40	40
US Plan Assets | Level One | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	473	433
US Plan Assets | Level One | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	159	175
US Plan Assets | Level One | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	655	622
US Plan Assets | Level Two
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,812	1,986
US Plan Assets | Level Two | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	46	19
US Plan Assets | Level Two | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	132	119
US Plan Assets | Level Two | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	599	654
US Plan Assets | Level Two | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	430	560
US Plan Assets | Level Two | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	65	107
US Plan Assets | Level Two | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	540	527
US Plan Assets | Level Three
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	328	293
US Plan Assets | Level Three | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	203	210
US Plan Assets | Level Three | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	125	83
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	6,832	6,830	$ 6,246
International | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	138	264
International | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,639	1,534
International | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	657	780
International | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,036	1,181
International | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	143	256
International | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	331	246
International | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	49	49
International | Other
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	103	88
International | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	2,736	2,432
International | Level One
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	3,542	2,986
International | Level One | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	115	174
International | Level One | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,179	1,047
International | Level One | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	8	8
International | Level One | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	2,240	1,757
International | Level Two
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	2,807	3,461
International | Level Two | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	23	90
International | Level Two | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	460	487
International | Level Two | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	657	780
International | Level Two | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,028	1,173
International | Level Two | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	143	256
International | Level Two | United States | Equity securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	496	675
International | Level Three
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	483	383
International | Level Three | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	331	246
International | Level Three | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	49	49
International | Level Three | Other
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	$ 103	$ 88

Pension and Other Benefit Pla96

Pension and Other Benefit Plans - Defined Benefit Plan Weighted Average Assumptions Used in Calculating Benefit Obligation and Net Periodic Benefit Cost For US Postretirement Medical Plan (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.50%	4.15%
Current medical cost trend rate	7.00%	7.00%
Ultimate medical cost trend rate	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2,023	2,023
Postretirement medical plan
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Discount rate	4.15%	4.85%	4.25%
Return on plan assets	7.00%	7.00%	7.00%
Current medical cost trend rate	7.00%	7.25%	7.50%
Ultimate medical cost trend rate	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2,023	2,023	2,023

Pension and Other Benefit Pla97

Pension and Other Benefit Plans - Changes in Accumulated Postretirement Benefit Obligation, Plan Assets and Funded Status (Detail) - Postretirement medical plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	$ 1,221	$ 1,247
Service cost	42	43
Interest cost	48	60
Contribution by plan participants	7	6
Actuarial (gains) losses	(168)	210
Benefits paid	(47)	(46)
Plan amendments		(299)
Projected benefit obligation at end of year	1,103	1,221
Change in Plan Assets
Plan assets at fair value at beginning of year	854	731
Company contributions	66	65
Contribution by plan participants	7	6
Benefits paid	(47)	(46)
Actual return on plan assets	4	98
Plan assets at fair value at end of year	884	854
Unfunded Liability	(219)	(367)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial (gains) losses	106	242
Prior service cost	(275)	(307)
Total amount recognized in accumulated other comprehensive income	$ (169)	$ (65)

Pension and Other Benefit Pla98

Pension and Other Benefit Plans - Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates (Detail) - Postretirement medical plan $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Effect on total service and interest cost components, One percentage point increase	$ 7
Effect on accumulated postretirement benefit obligation, One percentage point increase	37
Effect on total service and interest cost components, One percentage point decrease	(6)
Effect on accumulated postretirement benefit obligation, One percentage point decrease	$ (33)

Pension and Other Benefit Pla99

Pension and Other Benefit Plans - Expected Benefits to be Paid Under US and International Pension Plans and Postretirement Medical Plan (Detail) $ in Millions	Dec. 31, 2015USD ($)
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
2,016	$ 176
2,017	183
2,018	189
2,019	197
2,020	205
2021-2025	1,152
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
2,016	242
2,017	259
2,018	278
2,019	294
2,020	310
2021-2025	1,781
Postretirement medical plan
Pension Plans Postretirement And Other Employee Benefits [Line Items]
2,016	50
2,017	53
2,018	57
2,019	60
2,020	62
2021-2025	$ 341

Pension and Other Benefit Pl100

Pension and Other Benefit Plans - Defined Benefit Plan, Amounts That Will be Amortized from Accumulated Other Comprehensive Income (loss) in Next Fiscal Year (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
Pension Plans
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Net actuarial losses	$ 163
Prior service cost (credit)	133
Postretirement medical plan
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Prior service cost (credit)	$ (32)

Supplementary Information - Cas

Supplementary Information - Cash Paid for Interest and Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Interest	$ 346	$ 389	$ 369
Income tax	$ 1,567	$ 2,048	$ 1,729

Supplementary Information - Add

Supplementary Information - Additional Information (Detail) $ in Millions	Dec. 31, 2015USD ($)
Segment Reporting [Abstract]
Fixed assets receivable in lieu of accounts receivable	$ 200

Supplementary Information - Int

Supplementary Information - Interest and Other Income, Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Interest income	$ 52	$ 51	$ 33
Earnings of equity method investments	184	240	132
Interest and other income, net	$ 236	$ 291	$ 165

Supplementary Information - Cha

Supplementary Information - Change in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Balance at beginning of year	$ 275	$ 384	$ 202
Provision	75	39	205
Amounts written off	(17)	(148)	(23)
Balance at end of year	$ 333	$ 275	$ 384

Supplementary Information - Acc

Supplementary Information - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting [Abstract]
Payroll, vacation and employee benefits	$ 1,424	$ 1,899
Trade	3,243	4,344
Other	3,060	3,003
Accounts payable and accrued liabilities	$ 7,727	$ 9,246

Discontinued Operations - Addit

Discontinued Operations - Additional Information (Detail) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2014USD ($)	Dec. 31, 2015Conspiracy	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)	Jun. 30, 2015USD ($)
Discontinued Operations And Disposal Groups [Abstract]
Loss from discontinued operations	$ 205		$ 205	$ 69
Number of resolved criminal counts of conspiracy to violate International Emergency Powers Act | Conspiracy		1
Amount of fines, penalties and assessments					$ 233

Discontinued Operations - Disco

Discontinued Operations - Discontinued Operations (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations And Disposal Groups [Abstract]
Revenue			$ 102
Loss before taxes		$ (205)	(63)
Tax expense			(6)
Loss from discontinued operations	$ (205)	$ (205)	$ (69)