Schlumberger Limited (SLB) 10-K 24 Jan 18 2017 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2017
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Trading Symbol	SLB
Entity Registrant Name	SCHLUMBERGER LIMITED/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	1,383,932,776
Entity Public Float		$ 91,070

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue
Services	$ 21,927	$ 20,259	$ 31,652
Product sales	8,513	7,551	3,823
Total Revenue	30,440	27,810	35,475
Interest & other income	224	200	236
Expenses
Cost of services	18,206	17,352	25,175
Cost of sales	8,337	7,057	3,146
Research & engineering	787	1,012	1,094
General & administrative	432	403	494
Impairments & other	3,211	3,172	2,575
Merger & integration	308	349
Interest	566	570	346
Income (loss) before taxes	(1,183)	(1,905)	2,881
Tax expense (benefit)	330	(278)	746
Net income (loss)	(1,513)	(1,627)	2,135
Net income attributable to noncontrolling interests	(8)	60	63
Net income (loss) attributable to Schlumberger	$ (1,505)	$ (1,687)	$ 2,072
Basic earnings per share of Schlumberger	$ (1.08)	$ (1.24)	$ 1.63
Diluted earnings per share of Schlumberger	$ (1.08)	$ (1.24)	$ 1.63
Average shares outstanding:
Basic	1,388	1,357	1,267
Assuming dilution	1,388	1,357	1,275

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (1,513)	$ (1,627)	$ 2,135
Currency translation adjustments
Unrealized net change arising during the period	(3)	(83)	(522)
Marketable securities
Unrealized gain (loss) arising during the period	(8)	21	(50)
Reclassification to net income - impairment charge			40
Cash flow hedges
Net gain (loss) on cash flow hedges	22	(101)	(178)
Reclassification to net income (loss) of net realized loss		121	235
Actuarial gain (loss)
Actuarial gain (loss) arising during the period	134	(289)	(210)
Amortization to net income (loss) of net actuarial loss	159	157	306
Prior service cost
Amortization to net income (loss) of net prior service cost	80	102	101
Income taxes on pension and other postretirement benefit plans	(15)	(13)	(74)
Comprehensive income (loss)	(1,144)	(1,712)	1,783
Comprehensive income (loss) attributable to noncontrolling interests	(8)	60	63
Comprehensive income (loss) attributable to Schlumberger	$ (1,136)	$ (1,772)	$ 1,720

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current Assets
Cash	$ 1,799	$ 2,929
Short-term investments	3,290	6,328
Receivables less allowance for doubtful accounts (2017 - $241; 2016 - $397)	8,084	9,387
Inventories	4,046	4,225
Other current assets	1,278	1,058
Current assets total	18,497	23,927
Fixed Income Investments, held to maturity		238
Investments in Affiliated Companies	1,519	1,243
Fixed Assets less accumulated depreciation	11,576	12,821
Multiclient Seismic Data	727	1,073
Goodwill	25,118	24,990
Intangible Assets	9,354	9,855
Other Assets	5,196	3,809
Total Assets	71,987	77,956
Current Liabilities
Accounts payable and accrued liabilities	10,036	10,016
Estimated liability for taxes on income	1,223	1,188
Short-term borrowings and current portion of long-term debt	3,324	3,153
Dividends payable	699	702
Current Liabilities Total	15,282	15,059
Long-term Debt	14,875	16,463
Postretirement Benefits	1,082	1,495
Deferred Taxes	1,650	1,880
Other Liabilities	1,837	1,530
Total Liabilities	34,726	36,427
Equity
Common stock	12,975	12,801
Treasury stock	(4,049)	(3,550)
Retained earnings	32,190	36,470
Accumulated other comprehensive loss	(4,274)	(4,643)
Schlumberger stockholders' equity	36,842	41,078
Noncontrolling interests	419	451
Total equity	37,261	41,529
Liabilities and stockholders equity	$ 71,987	$ 77,956

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts on receivable	$ 241	$ 397	$ 333	$ 275

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income (loss)		$ (1,513)	$ (1,627)	$ 2,135
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Impairments and other charges		3,764	3,820	2,575
Depreciation and amortization	[1]	3,837	4,094	4,078
Pension and other postretirement benefits expense		104	187	438
Stock-based compensation expense		343	267	326
Pension and other postretirement benefits funding		(133)	(174)	(346)
Earnings of equity method investments, less dividends received		(56)	(60)	(125)
Change in assets and liabilities:
(Increase) decrease in receivables	[2]	(124)	1,098	2,176
Decrease in inventories	[2]	108	800	625
(Increase) decrease in other current assets	[2]	(174)	308	76
Decrease (increase) in other assets	[2]	402	(488)	16
Decrease in accounts payable and accrued liabilities	[2]	(737)	(1,680)	(2,656)
Increase (decrease) in estimated liability for taxes on income	[2]	104	(110)	(699)
(Decrease) increase in other liabilities	[2]	(28)	77	24
Other	[2]	(234)	(251)	162
NET CASH PROVIDED BY OPERATING ACTIVITIES		5,663	6,261	8,805
Cash flows from investing activities:
Capital expenditures		(2,107)	(2,055)	(2,410)
SPM investments		(1,609)	(1,031)	(953)
Multiclient seismic data capitalized		(276)	(630)	(486)
Business acquisitions and investments, net of cash acquired		(847)	(2,398)	(443)
Sale (purchase) of investments, net		3,277	5,544	(5,848)
Other		(217)	(54)	(112)
NET CASH USED IN INVESTING ACTIVITIES		(1,779)	(624)	(10,252)
Cash flows from financing activities:
Dividends paid		(2,778)	(2,647)	(2,419)
Proceeds from employee stock purchase plan		212	231	296
Proceeds from exercise of stock options		85	184	152
Stock repurchase program		(969)	(778)	(2,182)
Proceeds from issuance of long-term debt		2,371	3,640	9,565
Repayment of long-term debt		(2,961)	(5,630)	(3,771)
Net decrease in short-term borrowings		(1,022)	(387)	(3)
Other		29	(41)	(264)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES		(5,033)	(5,428)	1,374
Cash flow used in discontinued operations - operating activities				(233)
Net (decrease) increase in cash before translation effect		(1,149)	209	(306)
Translation effect on cash		19	(73)	(31)
Cash, beginning of period		2,929	2,793	3,130
Cash, end of period		$ 1,799	$ 2,929	$ 2,793
[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	Cameron	Common Stock Issued	Common Stock IssuedCameron	Common Stock In Treasury	Common Stock In TreasuryCameron	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
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
Treasury shares, Balance at Dec. 31, 2014					(159)
Net income (loss)	$ 2,135						2,072		63
Currency translation adjustments	(522)							(522)
Changes in unrealized gain on 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
Treasury shares, Balance at Dec. 31, 2015					(178)
Net income (loss)	$ (1,627)						(1,687)		60
Currency translation adjustments	(83)							(83)
Changes in unrealized gain on marketable securities	21							21
Changes in fair value of cash flow hedges	20							20
Pension and other postretirement benefit plans	(43)							(43)
Shares sold to optionees, less shares exchanged	$ 184		$ (82)		$ 266
Shares sold to optionees, less shares exchanged, shares	3				3
Vesting of restricted stock			(122)		$ 122
Vesting of restricted stock, shares	1				1
Shares issued under employee stock purchase plan	$ 231		(55)		$ 286
Shares issued under employee stock purchase plan, shares	4				4
Stock repurchase program	$ (778)				$ (778)
Stock repurchase program, shares	(11)				(11)
Stock-based compensation expense	$ 267		267
Dividends declared	(2,713)						(2,713)
Shares issued for acquisition		$ 10,027		$ 103		$ 9,924
Shares issued for acquisition, shares		138				138
Acquisition of noncontrolling interest	106								106
Other	12		(3)		$ 2				13
Balance at Dec. 31, 2016	$ 41,529		$ 12,801		$ (3,550)		36,470	(4,643)	451
Balance, shares at Dec. 31, 2016	1,391		1,434
Treasury shares, Balance at Dec. 31, 2016					(43)
Net income (loss)	$ (1,513)						(1,505)		(8)
Currency translation adjustments	(3)							(3)
Changes in unrealized gain on marketable securities	(8)							(8)
Changes in fair value of cash flow hedges	22							22
Pension and other postretirement benefit plans	358							358
Shares sold to optionees, less shares exchanged	$ 85		$ (10)		$ 95
Shares sold to optionees, less shares exchanged, shares	1				1
Vesting of restricted stock			(110)		$ 110
Vesting of restricted stock, shares	2				2
Shares issued under employee stock purchase plan	$ 212		(52)		$ 264
Shares issued under employee stock purchase plan, shares	3				3
Stock repurchase program	$ (969)				$ (969)
Stock repurchase program, shares	(13)				(13)
Stock-based compensation expense	$ 343		343
Dividends declared	(2,775)						(2,775)
Other	(20)		3		$ 1				(24)
Balance at Dec. 31, 2017	$ 37,261		$ 12,975		$ (4,049)		$ 32,190	$ (4,274)	$ 419
Balance, shares at Dec. 31, 2017	1,384		1,434
Treasury shares, Balance at Dec. 31, 2017					(50)

CONSOLIDATED STATEMENT OF STOC8

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Retained Earnings
Dividends declared, per share	$ 2	$ 2	$ 2

Business Description

Business Description	12 Months Ended
	Dec. 31, 2017
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 for reservoir characterization, drilling, production and processing to the oil and gas industry.

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Accounting Policies	2. Summary of Accounting Policies The Consolidated Financial Statements 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; revenue recognized under the percentage-of-completion method; 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 is recognized for certain long-term construction-type contracts based on the percentage-of-completion method. These contracts involve significant design and engineering efforts in order to satisfy custom designs for customer-specific applications. Under the percentage-of-completion method, revenue is recognized as work progresses on each such contract. Progress is measured by the ratio of actual costs incurred to date on the project in relation to total estimated project costs. Any expected losses on a project are recorded in full in the period in which they become probable. Progress billings are generally issued upon completion of certain phases of work as stipulated in the contract. Revenue in excess of billings is included within Receivables less allowance for doubtful accounts Consolidated Balance Sheet Accounts payable and accrued liabilities Consolidated Balance Sheet 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 its 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 Investments The Consolidated Balance Sheet Short-term investments For purposes of the Consolidated Statement of Cash Flows Short-term investments 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 Accumulated other comprehensive loss Equity and cost method investments as well as investments in available-for-sale marketable securities are classified as Investments in Affiliated Companies Consolidated Balance Sheet Multiclient Seismic Data Schlumberger’s 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 services 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 involve 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 managing production on behalf of Schlumberger’s clients under long-term agreements. Schlumberger will invest its own services and 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 includes certain arrangements whereby Schlumberger is only compensated based upon incremental production it helps deliver above a mutually agreed baseline. Revenue from SPM arrangements, which is recognized as the related production is achieved, represented less than 5% of Schlumberger’s consolidated revenue during each of 2017, 2016 and 2015. 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. These capitalized investments are amortized to the Consolidated Statement of Income (Loss) During 2017, Schlumberger purchased a majority non-operating interest in the Palliser Block, located in Alberta, Canada. In connection with the initial accounting for this transaction, Schlumberger recorded a $268 million asset retirement obligation, which was included in both Other Assets Other Liabilities Consolidated Balance Sheet The unamortized portion of Schlumberger’s investments in SPM projects was $4.065 billion and $2.458 billion at December 31, 2017 and 2016, respectively. These amounts are included within Other Assets 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 exposures, 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. Accounts receivable in the United States represented approximately 23% of Schlumberger’s accounts receivable balance at December 31, 2017. No other country accounted for greater than 10% of Schlumberger’s accounts receivable balance. Earnings per Share The following is a reconciliation from basic to diluted earnings (loss) per share of Schlumberger for each of the last three years: (Stated in millions, except per share amounts) Net Income (Loss) Attributable to Schlumberger Average Shares Outstanding Earnings (Loss) per Share 2017: Basic $ (1,505 ) 1,388 $ (1.08 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (1,505 ) 1,388 $ (1.08 ) 2016: Basic $ (1,687 ) 1,357 $ (1.24 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (1,687 ) 1,357 $ (1.24 ) 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 The number of outstanding employee stock options to purchase shares of Schlumberger common stock and unvested restricted stock units that were not included in the computation of diluted earnings/loss per share, because to do so would have had an anti-dilutive effect, were as follows: (Stated in millions) 2017 2016 2015 Employee stock options 47 47 20 Unvested restricted stock 5 5 - 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 In February 2016, the FASB issued ASU No. 2016-02, Leases Consolidated Balance Sheet Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation.

Charges and Credits

Charges and Credits	12 Months Ended
	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Charges and Credits	3. Charges and Credits Schlumberger recorded the following charges and credits during 2017, 2016 and 2015: 2017 • During the fourth quarter of 2017, Schlumberger decided to cease all future marine seismic acquisition activities, after satisfying its remaining contractual commitments. As a result, Schlumberger will seek to monetize its existing fleet of marine seismic vessels. This decision resulted in a charge of $1.025 billion consisting of the following: $786 million write-down of the vessels to their estimated fair value; $78 million impairment of intangible assets; $59 million write-down of inventory, and $102 million of other related restructuring costs. The fair value of the vessels was determined based on unobservable inputs that required significant judgments. Schlumberger also recorded a $90 million impairment charge relating to its land seismic business. • As a result of the unfavorable near-term outlook for exploration spending, Schlumberger determined in the fourth quarter of 2017 that the carrying value of certain multiclient seismic data, primarily related to the US Gulf of Mexico, was impaired, resulting in a $246 million charge that was estimated based on the projected present value of future cash flows that these surveys are expected to generate. • During the fourth quarter of 2017, Schlumberger determined that it was appropriate to write-down its investment in Venezuela, given the recent economic and political developments in the country which have created significant uncertainties regarding recoverability. As a result, Schlumberger recorded a charge of $938 million, reflecting $469 million of accounts receivable, a $105 million other-than-temporary impairment charge relating to the promissory notes described below, $285 million of fixed assets and $79 million of other assets in the country. • During the fourth quarter of 2017, Schlumberger recorded a $245 million charge related to an estimated loss on a long-term surface facility construction project that is accounted for under the percentage-of-completion method. • Schlumberger recorded $156 million of other restructuring charges during the fourth quarter of 2017, primarily relating to facility and other exit costs. • During the fourth quarter of 2017, Schlumberger recorded a $247 million charge associated with headcount reductions primarily to further streamline its support cost structure. • On December 22, 2017, the US enacted the Tax Cuts and Jobs Act (the “Act”). The Act, which is also commonly referred to as “US tax reform”, significantly changes US corporate income tax laws by, among other things, reducing the US corporate income tax rate to 21% starting in 2018 and creating a territorial tax system with a one-time mandatory tax on previously deferred foreign earnings of US subsidiaries. As a result, Schlumberger recorded a net charge of $76 million during the fourth quarter of 2017. This amount, which is included in Tax expense (benefit) Consolidated Statement of Income (Loss) Although the $76 million net charge represents what Schlumberger believes is a reasonable estimate of the impact of the income tax effects of the Act on Schlumberger’s Consolidated Financial Statements Tax expense (benefit) • During the second quarter of 2017, Schlumberger entered into a financing agreement with its primary customer in Venezuela. This agreement resulted in the exchange of $700 million of outstanding accounts receivable for promissory notes with a three-year term that bear interest at the rate of 6.50% per annum. Schlumberger recorded these notes at their estimated fair value on the date of the exchange, which resulted in a charge of $460 million. Schlumberger is accounting for the promissory notes as available-for-sale securities reported at fair value in Other Assets, Accumulated other comprehensive loss • During the second quarter of 2017, Schlumberger entered into discussions with a customer relating to certain of its outstanding accounts receivable. As a result of these discussions, Schlumberger recorded a charge of $50 million to adjust these receivables to their estimated net realizable value. • Schlumberger recorded $308 million of charges during 2017 relating to employee benefits, facility closures and other merger and integration-related costs, primarily in connection with Schlumberger’s 2016 acquisition of Cameron International Corporation (“Cameron”) (See Note 4 – Acquisitions The following is a summary of these charges and credits, of which $3.211 billion were classified as Impairments & other Cost of sales Merger & integration Consolidated Statement of Income (Loss) (Stated in millions) Noncontrolling Pretax Tax Interests Net Impairment & other WesternGeco seismic restructuring charges $ 1,114 $ 20 $ - $ 1,094 Venezuela investment write-down 938 - - 938 Promissory note fair value adjustment and other 510 - 12 498 Workforce reductions 247 13 - 234 Multiclient seismic data impairment 246 81 - 165 Other restructuring charges 156 10 22 124 Cost of sales - - Provision for loss on long-term construction project 245 22 - 223 Merger & integration - - Merger and integration-related costs 308 70 - 238 US tax reform charge - (76 ) - 76 $ 3,764 $ 140 $ 34 $ 3,590 2016 • Schlumberger reduced its headcount during the second quarter of 2016 as a result of persistent unfavorable oil and gas industry market conditions and the expected impact on customer activity levels. Schlumberger recorded a $646 million charge during the second quarter of 2016 associated with this headcount reduction. During the fourth quarter of 2016, Schlumberger further reduced its headcount in order to streamline its support cost structure. Schlumberger recorded an additional $234 million charge during the fourth quarter associated with these actions. • During the fourth quarter of 2016, Schlumberger recorded $302 million of restructuring charges consisting of the following: $165 million of facility closure costs due to the expected sale of certain owned properties and the termination of certain facility leases; $98 million of asset write-offs associated with exiting certain activities; and $39 million of contract termination costs. • During the fourth quarter of 2016, the Central Bank of Egypt took the decision to float its currency and the Egyptian pound devalued relative to the US dollar. As a result, Schlumberger recorded a $63 million devaluation charge during the fourth quarter of 2016. • As a result of the unfavorable oil and gas industry market conditions that continued to deteriorate in the first half of 2016, and the related impact on 2016 first half operating results and expected customer activity levels, 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 other charges during the second quarter of 2016: - $209 million impairment of pressure pumping equipment in North America. - $165 million impairment of facilities in North America. - $684 million of other fixed asset impairments primarily relating to underutilized equipment. - $616 million write-down of the carrying value of certain inventory to its net realizable value. - $198 million impairment of certain multiclient seismic data, largely related to the US Gulf of Mexico. - $55 million of other restructuring costs. The fair value of the impaired fixed assets and multiclient seismic data was estimated based on the projected present value of future cash flows that these assets are expected to generate. Such estimates included unobservable inputs that required significant judgments. • In connection with Schlumberger’s acquisition of Cameron, Schlumberger recorded $349 million of charges, classified as Merger & integration Consolidated Statement of Income (Loss), Cost of sales Consolidated Statement of Income (Loss) Merger & integration Cost of sales The following is a summary of these charges and credits, of which $3.172 billion were classified as Impairments & other, Merger & integration Cost of sales Consolidated Statement of Income (Loss) (Stated in millions) Pretax Tax Net Impairment & other Workforce reductions $ 880 $ 69 $ 811 Other fixed asset impairments 684 52 632 Inventory write-downs 616 49 567 North America pressure pumping asset impairments 209 67 142 Multiclient seismic data impairment 198 62 136 Facility impairments 165 58 107 Facility closure costs 165 40 125 Costs associated with exiting certain activities 98 23 75 Currency devaluation loss in Egypt 63 - 63 Contract termination costs 39 9 30 Other restructuring charges 55 - 55 Merger & integration Other merger and integration-related 160 28 132 Merger-related employee benefits 83 13 70 Facility closure costs 61 13 48 Professional fees 45 10 35 Cost of sales Amortization of inventory fair value adjustment 299 90 209 $ 3,820 $ 583 $ 3,237 2015 • Schlumberger reduced 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. • As a result of unfavorable oil and gas industry market conditions that 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. - $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 decline in commodity prices and considering this project was approaching the end of its contractual term. - $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 were 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 then 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. 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 . • 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 Venezuelan 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. The following is a summary of these charges and credits, all of which were classified as Impairments & other Consolidated Statement of Income (Loss) (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

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Acquisitions	4. Acquisitions Cameron On April 1, 2016, Schlumberger acquired all of the outstanding shares of Cameron, a leading provider of flow equipment products, systems and services to the oil and gas industry worldwide. The acquisition is expected to create technology-driven growth by integrating Schlumberger reservoir and well technologies with Cameron wellhead and surface equipment, flow control and processing technology. The combination of the two complementary technology portfolios provides the industry’s most comprehensive range of products and services, from exploration to production and integrated pore-to-pipeline solutions that optimize hydrocarbon recovery to deliver reservoir performance. Under the terms of the merger agreement, Cameron became a wholly-owned subsidiary of Schlumberger. Each share of Cameron common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive 0.716 shares of Schlumberger stock and $14.44 in cash. Calculation of Consideration Transferred The fair value of the consideration transferred to effect the acquisition of Cameron was as follows: (stated in millions, except exchange ratio and per share amounts) Equity consideration: Number of shares of Cameron stock outstanding 192 Exchange ratio 0.716 Schlumberger shares of common stock issued 138 Schlumberger closing stock share price on April 1, 2016 $ 72.12 Equity consideration $ 9,924 Cash consideration: Number of shares of Cameron stock outstanding 192 Cash consideration per Cameron share $ 14.44 Cash consideration 2,776 Other: Fair value of replacement equity awards 103 Total fair value of the consideration transferred $ 12,803 Certain amounts reflect rounding adjustments Allocation of Consideration Transferred to Net Assets Acquired The following amounts represent the fair value of assets acquired and liabilities assumed in the merger. (Stated in millions) Cash $ 785 Short-term investments 1,448 Accounts receivable 1,669 Inventories (1) 2,350 Fixed assets 1,320 Intangible assets: Customer relationships (weighted-average life of 25 years) 2,371 Technology/Technical know-how (weighted-average life of 16 years) 1,736 Tradenames (weighted-average life of 25 years) 1,225 Other assets 511 Accounts payable and accrued liabilities (2,604 ) Long-term debt (2) (3,018 ) Deferred taxes (3) (1,343 ) Other liabilities (538 ) Sub-total $ 5,912 Less: Investment in OneSubsea (4) (2,065 ) Noncontrolling interests (57 ) Total identifiable net assets $ 3,790 Goodwill (5) 9,013 Total consideration transferred $ 12,803 (1) Cost of sales (2) (3) (4) (5) Supplemental Pro Forma Financial Information Cameron’s results of operations have been included in Schlumberger’s financial statements for periods subsequent to the closing of the acquisition on April 1, 2016. Businesses acquired from Cameron contributed revenues of approximately $4 billion and pretax operating income of approximately $0.7 billion for the period from April 1, 2016 through December 31, 2016. The following supplemental pro forma results of operations assume that Cameron had been acquired on January 1, 2015. The supplemental pro forma financial information was prepared based on the historical financial information of Schlumberger and Cameron and has been adjusted to give effect to pro forma adjustments that are both directly attributable to the transaction and factually supportable. The pro forma amounts reflect certain adjustments to amortization expense, interest expense and income taxes resulting from purchase accounting. The pro forma results for the year ended December 31, 2016 reflect adjustments to exclude after-tax merger and integration costs of $285 million and after-tax charges relating to the amortization of the inventory fair value adjustment of $209 million. As required by generally accepted accounting principles, the pro forma results for the year ended December 31, 2015 have been adjusted to include after-tax adjustments for merger and integration costs of $285 million and the after-tax charges relating to the amortization of the inventory fair value adjustment of $209 million. The supplemental pro forma financial information presented below is unaudited and does not include any anticipated cost savings or the expected realization of other synergies associated with this transaction. Accordingly, this supplemental pro forma financial information is presented for informational purposes only and is not necessarily indicative of what the actual results of operations of the combined company would have been had the acquisition occurred on January 1, 2015, nor is it indicative of future results of operations. (Stated in millions, except per share amounts) 2016 2015 Revenue $ 29,438 $ 44,306 Net income (loss) attributable to Schlumberger $ (1,419 ) $ 2,000 Diluted earnings (loss) per share $ (1.02 ) $ 1.42 Other Schlumberger made other acquisitions and investments for cash payments, net of cash acquired, of $847 million during 2017, $407 million during 2016 and $443 million during 2015. 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, 2017
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) 2017 2016 Raw materials & field materials $ 1,846 $ 1,720 Work in progress 503 610 Finished goods 1,697 1,895 $ 4,046 $ 4,225

Fixed Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Fixed Assets	6. Fixed Assets A summary of fixed assets follows: (Stated in millions) 2017 2016 Land $ 428 $ 479 Buildings & improvements 5,122 4,849 Machinery & equipment 32,160 33,834 Seismic vessels 103 846 37,813 40,008 Less: Accumulated depreciation 26,237 27,187 $ 11,576 $ 12,821 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 $2.3 billion, $2.7 billion and $3.2 billion in 2017, 2016 and 2015, respectively.

Multiclient Seismic Data

Multiclient Seismic Data	12 Months Ended
	Dec. 31, 2017
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) 2017 2016 Balance at beginning of year $ 1,073 $ 1,026 Capitalized in period 276 630 Charged to expense (377 ) (385 ) Impairment charge (see Note 3) (245 ) (198 ) $ 727 $ 1,073

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2017
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 Cameron Total Balance, January 1, 2016 $ 3,798 $ 8,584 $ 3,223 $ - $ 15,605 Acquisition of Cameron 790 1,490 1,170 5,563 9,013 Other acquisitions 79 24 242 - 345 Reallocation 146 - - (146 ) - Impact of changes in exchange rates 7 16 4 - 27 Balance, December 31, 2016 4,820 10,114 4,639 5,417 24,990 Acquisitions 21 3 46 24 94 Impact of changes in exchange rates 7 9 12 6 34 Balance, December 31, 2017 $ 4,848 $ 10,126 $ 4,697 $ 5,447 $ 25,118

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	9. Intangible Assets A summary of intangible assets follows: (Stated in millions) 2017 2016 Gross Accumulated Net Book Gross Accumulated Net Book Book Amortization Value Book Value Amortization Value Customer Relationships $ 4,832 $ 1,020 $ 3,812 $ 4,938 $ 865 $ 4,073 Technology/Technical Know-How 3,634 1,078 2,556 3,655 835 2,820 Tradenames 2,806 533 2,273 2,847 458 2,389 Other 1,295 582 713 1,122 549 573 $ 12,567 $ 3,213 $ 9,354 $ 12,562 $ 2,707 $ 9,855 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 $663 million in 2017, $567 million in 2016 and $354 million in 2015. Based on the carrying value of intangible assets at December 31, 2017, amortization expense for the subsequent five years is estimated to be as follows: 2018: $677 million, 2019: $673 million, 2020: $638 million, 2021: $616 million and 2022: $608 million.

Long-term Debt and Debt Facilit

Long-term Debt and Debt Facility Agreements	12 Months Ended
	Dec. 31, 2017
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) 2017 2016 4.00% Senior Notes due 2025 $ 1,741 $ 1,740 3.30% Senior Notes due 2021 1,595 1,594 3.00% Senior Notes due 2020 1,593 1,591 3.65% Senior Notes due 2023 1,492 1,491 4.20% Senior Notes due 2021 1,100 1,100 2.40% Senior Notes due 2022 996 996 3.63% Senior Notes due 2022 846 845 0.63% Guaranteed Notes due 2019 712 622 1.50% Guaranteed Notes due 2019 (1) 603 536 2.65% Senior Notes due 2022 598 - 2.20% Senior Notes due 2020 498 - 7.00% Notes due 2038 (2) 212 214 4.50% Notes due 2021 (2) 135 137 5.95% Notes due 2041 (2) 115 116 3.60% Notes due 2022 (2) 110 110 5.13% Notes due 2043 (2) 99 99 4.00% Notes due 2023 (2) 82 83 3.70% Notes due 2024 (2) 56 56 2.35% Senior Notes due 2018 - 1,297 6.38% Notes due 2018 (2) - 297 Commercial paper borrowings 1,694 2,421 Other 598 1,118 $ 14,875 $ 16,463 (1) ( 2 ) 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, 2017, Schlumberger had separate committed credit facility agreements aggregating $6.6 billion with commercial banks, of which $3.6 billion was available and unused. This included $6.3 billion of committed facilities which support commercial paper programs in the United States and Europe, of which $1.0 billion matures in February 2018, $1.8 billion matures in July 2018, $1.5 billion matures in November 2020, and $2.0 billion matures in February 2021. 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 they are backed up 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, 2017 were $3.0 billion, of which $1.7 billion was classified within Long-term debt Short-term borrowings and current portion of long-term debt Consolidated Balance Sheet Long-term debt Short-term borrowings and current portion of long-term debt Consolidated Balance Sheet The weighted average interest rate on variable rate debt as of December 31, 2017 was 2.3%. Long-term Debt as of December 31, 2017 is due as follows: $1.5 billion in 2019, $2.8 billion in 2020, $4.3 billion in 2021, $2.6 billion in 2022, $1.6 billion in 2023, $1.7 billion in 2025 and $0.4 billion thereafter. The fair value of Schlumberger’s Long-term Debt

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2017
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 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. During 2017, a Canadian dollar functional currency subsidiary of Schlumberger issued $1.1 billion of US dollar denominated debt. Schlumberger entered into cross-currency swaps for an aggregate notional amount of $1.1 billion in order to hedge changes in the fair value of its $0.5 billion 2.20% Senior Notes due 2020 and its $0.6 billion 2.65% Senior Notes due 2022. These cross-currency swaps effectively convert the US dollar notes to Canadian dollar denominated debt with fixed annual interest rates of 1.97% and 2.52%, respectively. These cross-currency swaps are designated as a fair value hedges of the underlying debt. These derivative instruments are 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, 2017, Schlumberger had fixed rate debt aggregating $13.6 billion and variable rate debt aggregating $4.6 billion, after taking into account the effect of interest rate swaps. Short-term investments were $3.3 billion at December 31, 2017. The carrying value of these investments approximated fair value. Foreign Currency Exchange Rate Risk As a multinational company, Schlumberger conducts its business in over 85 countries. Schlumberger’s functional currency is primarily the US dollar. Approximately 78% of Schlumberger’s revenues in 2017 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 denominated in currencies other than the functional currency. Schlumberger uses foreign currency forward contracts 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 Accumulated Other Comprehensive Loss. Accumulated Other Comprehensive Loss At December 31, 2017, Schlumberger recognized a cumulative net $3 million gain in Accumulated other comprehensive loss Schlumberger is exposed to changes in the fair value of assets and liabilities denominated in currencies other than the functional currency. While Schlumberger uses foreign currency forward contracts 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 is recorded on the Consolidated Balance Sheet Consolidated Statement of Income, Consolidated Statement of Income (Loss) Charges and Credits At December 31, 2017, contracts were outstanding for the US dollar equivalent of $5.0 billion in various foreign currencies, of which $1.8 billion relates to hedges of debt denominated in currencies other than the functional currency. The fair value of outstanding derivatives was not material at December 31, 2017 and 2016. The effect of derivative instruments designated as fair value hedges and those not designated as hedges on the Consolidated Statement of Income (Loss) (Stated in millions) Gain (Loss) Recognized in Income 2017 2016 2015 Consolidated of Income (Loss) Classification Derivatives designated as fair value hedges: Cross currency swaps $ 73 $ (31 ) $ (64 ) Interest Derivatives not designated as hedges: Cross currency swaps $ (8 ) $ - $ - Interest Foreign exchange contracts (26 ) (246 ) (154 ) Cost of services/sales $ (34 ) $ (246 ) $ (154 )

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2017
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 1,383,932,776 and 1,391,475,510 shares were outstanding on December 31, 2017 and 2016, 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 Schlumberger Board of Directors. No shares of preferred stock have been issued. Accumulated Other Comprehensive Loss consists of the following: (Stated in millions) Pension and Currency Other Translation Marketable Cash Flow Postretirement Adjustments Securities Hedges Benefit Plans Total Balance, January 1, 2015 $ (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 income (loss) before reclassifications (83 ) 21 (101 ) (289 ) (452 ) Amounts reclassified from accumulated other comprehensive loss - - 121 259 380 Income taxes - - - (13 ) (13 ) Balance, December 31, 2016 (2,136 ) 21 (19 ) (2,509 ) (4,643 ) Other comprehensive income (loss) before reclassifications (3 ) (8 ) 22 134 145 Amounts reclassified from accumulated other comprehensive loss - - - 239 239 Income taxes - - - (15 ) (15 ) Balance, December 31, 2017 $ (2,139 ) $ 13 $ 3 $ (2,151 ) $ (4,274 ) Other comprehensive income was $369 million in 2017. Other comprehensive loss was $85 million in 2016 and $352 billion in 2015.

Stock-based Compensation Plans

Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 Dividend yield 2.3 % 2.7 % 2.3 % Expected volatility 27 % 30 % 36 % Risk-free interest rate 2.4 % 1.7 % 1.7 % Expected option life in years 7.0 7.0 7.0 Weighted-average fair value per share $ 20.85 $ 17.45 $ 25.96 The following table summarizes information related to options outstanding and options exercisable as of December 31, 2017: (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 5,696 4.8 $ 56.17 4,132 $ 53.91 $68.51 - $71.06 6,665 4.0 $ 69.93 6,008 $ 69.82 $72.11 - $79.85 9,107 5.5 $ 73.97 7,033 $ 73.08 $80.53 - $87.38 15,511 6.1 $ 84.01 7,186 $ 83.68 $88.61 - $114.83 10,231 6.2 $ 95.07 5,960 $ 95.32 47,210 5.6 $ 79.13 30,319 $ 76.71 The weighted-average remaining contractual life of stock options exercisable as of December 31, 2017 was 4.3 years. The following table summarizes stock option activity during the years ended December 31, 2017, 2016 and 2015: (Shares stated in thousands) 2017 2016 2015 Weighted- Weighted- Weighted- Average Average Average Exercise Exercise Exercise Shares Price Shares Price Shares Price Outstanding at beginning of year 46,502 $ 78.31 41,087 $ 78.73 38,583 $ 76.10 Granted 5,024 $ 86.55 7,672 $ 76.14 7,118 $ 86.86 Assumed in Cameron transaction - $ - 3,088 $ 63.24 - $ - Exercised (1,156 ) $ 57.87 (3,357 ) $ 60.70 (2,561 ) $ 60.10 Forfeited (3,160 ) $ 86.99 (1,988 ) $ 84.60 (2,053 ) $ 80.34 Outstanding at year-end 47,210 $ 79.13 46,502 $ 78.31 41,087 $ 78.73 The aggregate intrinsic value of stock options outstanding and stock options exercisable as of December 31, 2017 was $64 million and $56 million, respectively. The total intrinsic value of options exercised during the years ended December 31, 2017, 2016 and 2015 was $26 million, $45 million and $62 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 certain predefined targets as defined in the underlying performance share unit agreement. In the event Schlumberger exceeds the predefined target, shares for up to the maximum of 250% of the target award may be awarded. In the event Schlumberger falls below the predefined target, a reduced number of shares may be granted. If Schlumberger falls below the threshold award performance level, no shares will be awarded. As of December 31, 2017, 1.1 million performance share units All other restricted stock awards generally vest at the end of three years. Restricted stock awards generally do not pay dividends or have voting rights prior to vesting. Accordingly, the fair value of a 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 prior to vesting. The following table summarizes information related to restricted stock transactions: (Shares stated in thousands) 2017 2016 2015 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 5,112 $ 78.31 3,571 $ 85.04 4,138 $ 80.80 Granted 2,495 $ 73.09 1,678 $ 68.66 1,254 $ 82.37 Assumed in Cameron transaction - $ - 1,824 $ 72.12 - $ - Vested (1,645 ) $ 83.03 (1,720 ) $ 72.64 (1,495 ) $ 71.30 Forfeited (534 ) $ 80.17 (241 ) $ 80.87 (326 ) $ 83.86 Unvested at year-end 5,428 $ 72.33 5,112 $ 78.31 3,571 $ 85.04 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: 2017 2016 2015 Dividend yield 2.7 % 2.7 % 2.3 % Expected volatility 19 % 25 % 27 % Risk-free interest rate 1.0 % 0.5 % 0.2 % Weighted-average fair value per share $ 9.46 $ 10.37 $ 12.45 Total Stock-based Compensation Expense The following summarizes stock-based compensation expense recognized in income: (Stated in millions) 2017 2016 2015 Stock options $ 161 $ 175 $ 176 Restricted stock 148 47 107 DSPP 34 45 43 $ 343 $ 267 $ 326 At December 31, 2017, there was $485 million of total unrecognized compensation cost related to nonvested stock-based compensation arrangements, of which $246 million is expected to be recognized in 2018, $158 million in 2019, $58 million in 2020, $22 million in 2021 and $1 million in 2022. As of December 31, 2017, approximately 45 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, 2017
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 (loss) before taxes subject to United States and non-United States income taxes was as follows: (Stated in millions) 2017 2016 2015 United States $ (841 ) $ (3,103 ) $ (691 ) Outside United States (342 ) 1,198 3,572 $ (1,183 ) $ (1,905 ) $ 2,881 Schlumberger recorded pretax charges of $3.764 billion in 2017 ($533 million in the US and $3.231 billion outside the US); $3.820 billion in 2016 ($1.848 billion in the US and $1.972 billion outside the US); and $2.575 billion in 2015 ($883 million in the US and $1.692 billion 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) 2017 2016 Postretirement benefits $ 135 $ 253 Intangible assets (2,186 ) (2,869 ) Investments in non-US subsidiaries (224 ) (271 ) Fixed assets, net (55 ) (79 ) Inventories 126 248 Other, net 554 838 $ (1,650 ) $ (1,880 ) The above deferred tax balances at December 31, 2017 and 2016 were net of valuation allowances relating to net operating losses in certain countries of $119 million and $97 million, respectively. As a direct result of Schlumberger’s 2016 acquisition of Cameron, certain non-US subsidiaries of Cameron are either wholly or partially owned by a US subsidiary of Schlumberger. As described in Note 3, Schlumberger recorded a $410 million charge relating to the one-time mandatory tax on previously deferred foreign earnings of Schlumberger’s US subsidiary. After considering the impact of foreign tax credits and tax losses, the resulting cash tax payable as a result of the one-time mandatory tax on previously deferred foreign earnings of Schlumberger’s US subsidiary will not be significant. Other than as described above, Schlumberger generally does not provide for taxes related to its undistributed earnings because such earnings either would not be taxable when remitted or they are considered to be indefinitely reinvested. Taxes that would be incurred if the undistributed earnings of other Schlumberger subsidiaries were distributed to their ultimate parent company would not be material. The components of Tax expense (benefit) (Stated in millions) 2017 2016 2015 Current: United States-Federal $ (170 ) $ (511 ) $ 90 United States-State 57 (36 ) 12 Outside United States 703 648 1,085 590 101 1,187 Deferred: United States-Federal $ (225 ) $ (352 ) $ (356 ) United States-State 4 (13 ) (19 ) Outside United States (47 ) (51 ) (52 ) Valuation allowance 8 37 (14 ) (260 ) (379 ) (441 ) $ 330 $ (278 ) $ 746 A reconciliation of the United States statutory federal tax rate (35%) to the consolidated effective tax rate follows: 2017 2016 2015 US federal statutory rate 35 % 35 % 35 % State tax - 2 - Non-US income taxed at different rates (24 ) (21 ) (13 ) Charges and credits (See Note 3) (40 ) (1 ) 6 Enactment of US tax reform (6 ) - - Other 7 - (2 ) (28 )% 15 % 26 % 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 that are resolved with the tax 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, 2017, 2016 and 2015 is as follows: (Stated in millions) 2017 2016 2015 Balance at beginning of year $ 1,419 $ 1,285 $ 1,402 Additions based on tax positions related to the current year 132 70 140 Additions for tax positions of prior years 58 119 136 Additions related to acquisitions - 127 5 Impact of changes in exchange rates 23 (25 ) (78 ) Settlements with tax authorities (41 ) (45 ) (99 ) Reductions for tax positions of prior years (157 ) (85 ) (203 ) Reductions due to the lapse of the applicable statute of limitations (41 ) (27 ) (18 ) Balance at end of year $ 1,393 $ 1,419 $ 1,285 The amounts above exclude accrued interest and penalties of $195 million, $178 million and $176 million at December 31, 2017, 2016 and 2015, respectively. Schlumberger classifies interest and penalties relating to uncertain tax positions within Tax expense (benefit) Consolidated Statement of Income (Loss) 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 2012 - 2017 Canada 2010 - 2017 Ecuador 2014 - 2017 Mexico 2011 - 2017 Norway 2013 - 2017 Russia 2014 - 2017 Saudi Arabia 2004 - 2017 United Kingdom 2015 - 2017 United States 2014 - 2017 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, 2017
Leases [Abstract]
Leases and Lease Commitments	15. Leases and Lease Commitments Total rental expense was $1.1 billion in 2017, $1.2 billion in 2016, and $1.6 billion in 2015. Future minimum rental commitments under noncancelable operating leases for each of the next five years are as follows: (Stated in millions) 2018 $ 284 2019 244 2020 203 2021 164 2022 127 Thereafter 410 $ 1,432

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2017
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 currently pending legal proceeding is remote. However, litigation is inherently uncertain and it is not possible to predict the ultimate disposition of any of these proceedings.

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Segment Information	17. Segment Information Schlumberger’s segments are as follows: Reservoir Characterization Group Drilling Group Production Group ● Cameron Group Financial information for the years ended December 31, 2017, 2016 and 2015, by segment, is as follows: (Stated in millions) 2017 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Expenditures Reservoir Characterization $ 6,786 $ 1,251 $ 4,892 $ 988 $ 305 Drilling 8,392 1,151 5,421 685 629 Production 10,639 928 12,326 1,249 889 Cameron 5,205 733 3,978 264 150 Eliminations & other (582 ) (142 ) 1,881 213 134 Pretax operating income 3,921 Goodwill and intangible assets 34,472 Cash and short term investments 5,089 All other assets 3,928 Corporate & other (1) (934 ) 438 Interest income (2) 107 Interest expense (3) (513 ) Charges & credits (4) (3,764 ) $ 30,440 $ (1,183 ) $ 71,987 $ 3,837 $ 2,107 (Stated in millions) 2016 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Expenditures Reservoir Characterization $ 6,648 $ 1,249 $ 6,890 $ 1,104 $ 532 Drilling 8,561 994 6,747 904 425 Production 8,804 507 10,476 1,234 655 Cameron 4,211 653 4,246 211 176 Eliminations & other (414 ) (130 ) 1,605 257 267 Pretax operating income 3,273 Goodwill and intangible assets 34,845 Cash, short term investments and fixed income investments 9,495 All other assets 3,652 Corporate & other (1) (925 ) 384 Interest income (2) 84 Interest expense (3) (517 ) Charges & credits (4) (3,820 ) $ 27,810 $ (1,905 ) $ 77,956 $ 4,094 $ 2,055 (Stated in millions) 2015 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Expenditures Reservoir Characterization $ 9,501 $ 2,450 $ 8,266 $ 1,279 $ 648 Drilling 13,563 2,538 8,562 1,177 673 Production 12,548 1,585 9,938 1,216 824 Eliminations & other (137 ) (63 ) 2,039 213 265 Pretax operating income 6,510 Goodwill and intangible assets 20,174 Cash, short term investments and fixed income investments 13,452 All other assets 5,574 Corporate & other (1) (768 ) 193 Interest income (2) 30 Interest expense (3) (316 ) Charges & credits (4) (2,575 ) $ 35,475 $ 2,881 $ 68,005 $ 4,078 $ 2,410 (1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets (including intangible asset amortization expense resulting from the 2016 acquisition of Cameron), certain centrally managed initiatives and other nonoperating items. (2) Interest income excludes amounts which are included in the segments’ income (2017: $21 million; 2016: $26 million; 2015: $22 million). (3) Interest expense excludes amounts which are included in the segments’ income (2017: $53 million; 2016: $53 million; 2015: $30 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, 2017, 2016 and 2015 is as follows: (Stated in millions) 2017 2016 2015 North America $ 9,487 $ 6,665 $ 9,811 Latin America 3,976 4,230 6,014 Europe/CIS/Africa 7,047 7,351 9,284 Middle East & Asia 9,419 9,286 9,898 Eliminations & other 511 278 468 $ 30,440 $ 27,810 $ 35,475 Revenue is based on the location where services are provided and products are sold. During each of the three years ended December 31, 2017, 2016 and 2015, 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 2017, 2016 and 2015 was $8.1 billion, $5.4 billion and $8.5 billion, respectively. Fixed Assets less accumulated depreciation by geographic area are as follows: (Stated in millions) 2017 2016 2015 North America $ 5,120 $ 4,428 $ 4,392 Latin America 1,042 1,460 1,728 Europe/CIS/Africa 2,540 2,706 2,978 Middle East & Asia 2,771 3,149 3,078 Unallocated (1) 103 1,078 1,239 $ 11,576 $ 12,821 $ 13,415 (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, 2017
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 US 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 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 2017 2016 2015 2017 2016 2015 Discount rate 4.20 % 4.50 % 4.15 % 4.13 % 4.36 % 4.07 % Compensation increases 4.00 % 4.00 % 4.00 % 4.81 % 4.81 % 4.79 % Return on plan assets 7.25 % 7.25 % 7.25 % 7.40 % 7.40 % 7.40 % Net pension cost for 2017, 2016 and 2015 included the following components: (Stated in millions) US International 2017 2016 2015 2017 2016 2015 Service cost - benefits earned during the period $ 57 $ 62 $ 86 $ 95 $ 110 $ 167 Interest cost on projected benefit obligation 175 177 170 306 311 297 Expected return on plan assets (242 ) (235 ) (229 ) (541 ) (517 ) (498 ) Amortization of prior service cost 12 12 12 97 122 121 Amortization of net loss 39 79 123 120 78 170 $ 41 $ 95 $ 162 $ 77 $ 104 $ 257 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 2017 2016 2017 2016 Discount rate 3.70 % 4.20 % 3.55 % 4.13 % Compensation increases 4.00 % 4.00 % 4.81 % 4.81 % The changes in the projected benefit obligation, plan assets and funded status of the plans were as follows: (Stated in millions) US International 2017 2016 2017 2016 Change in Projected Benefit Obligations Projected benefit obligation at beginning of year $ 4,240 $ 4,025 $ 7,793 $ 7,340 Service cost 57 62 95 110 Interest cost 175 177 306 311 Contribution by plan participants - - 88 117 Actuarial (gains) losses 325 137 616 477 Currency effect - - 147 (290 ) Benefits paid (194 ) (183 ) (293 ) (272 ) Other - 22 - - Projected benefit obligation at end of year $ 4,603 $ 4,240 $ 8,752 $ 7,793 Change in Plan Assets Plan assets at fair value at beginning of year $ 3,625 $ 3,467 $ 7,194 $ 6,832 Actual return on plan assets 622 320 1,216 715 Currency effect - - 161 (318 ) Company contributions 5 4 88 130 Contributions by plan participants - - 88 117 Benefits paid (194 ) (183 ) (293 ) (272 ) Other - 17 53 (10 ) Plan assets at fair value at end of year $ 4,058 $ 3,625 $ 8,507 $ 7,194 Unfunded Liability $ (545 ) $ (615 ) $ (245 ) $ (599 ) Amounts Recognized in Balance Sheet Postretirement Benefits $ (545 ) $ (615 ) $ (418 ) $ (724 ) Other Assets - - 173 125 $ (545 ) $ (615 ) $ (245 ) $ (599 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses $ 887 $ 982 $ 1,419 $ 1,644 Prior service cost 30 42 17 114 $ 917 $ 1,024 $ 1,436 $ 1,758 Accumulated benefit obligation $ 4,347 $ 3,999 $ 8,400 $ 7,454 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 2017 2016 Target 2017 2016 Equity securities 37 - 56 % 51 % 52 % 45 - 71 % 64 % 64 % Debt securities 35 - 62 38 37 20 - 35 23 25 Cash and cash equivalents 0 - 3 3 2 0 - 5 4 2 Alternative investments 0 - 10 8 9 0 - 25 9 9 100 % 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 rate of return on assets assumptions reflect the long-term 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, 2017 and 2016, 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 2017 2016 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 112 $ 92 $ 20 $ - $ 60 $ 15 $ 45 $ - Equity Securities: US (a) 1,324 1,148 176 1,210 1,049 161 International (b) 757 747 10 662 649 13 Debt Securities Corporate bonds (c) 771 771 625 625 Government and government-related debt securities (d) 656 163 493 643 164 479 Collateralized mortgage obligations and mortgage backed securities (e) 108 108 92 92 Alternative Investments: Private equity (f) 183 183 191 191 Real estate (g) 147 147 142 142 Total $ 4,058 $ 2,150 $ 1,578 $ 330 $ 3,625 $ 1,877 $ 1,415 $ 333 (Stated in millions) International Plan Assets 2017 2016 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 307 $ 69 $ 238 $ - $ 184 $ 135 $ 49 $ - Equity Securities: US (a) 3,286 2,642 644 2,854 2,324 530 International (b) 2,160 1,871 289 1,726 1,475 251 Debt Securities Corporate bonds (c) 841 841 685 685 Government and government-related debt securities (d) 985 11 974 1,001 10 991 Collateralized mortgage obligations and mortgage backed securities (e) 150 150 130 130 Alternative Investments: Private equity (f) 477 477 385 385 Real estate (g) 168 168 106 106 Other 133 133 123 123 Total $ 8,507 $ 4,593 $ 3,136 $ 778 $ 7,194 $ 3,944 $ 2,636 $ 614 (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 funds of funds. (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 expects to contribute approximately $125 million to its postretirement benefit plans in 2018, subject to market and business conditions. Postretirement Benefits Other Than Pensions Schlumberger provides certain healthcare benefits to certain former US employees who have retired. Effective April 1, 2015, Schlumberger changed 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 subsidizes 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 by 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 2017 2016 2017 2016 2015 Discount rate 3.70 % 4.20 % 4.20 % 4.50 % 4.15 % Return on plan assets - - 7.00 % 7.00 % 7.00 % Current medical cost trend rate 7.25 % 7.25 % 7.25 % 7.50 % 7.00 % Ultimate medical cost trend rate 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate trend rate 2026 2026 2026 2026 2023 The net periodic benefit cost (credit) for the US postretirement medical plan included the following components: (Stated in millions) 2017 2016 2015 Service cost $ 29 $ 30 $ 42 Interest cost 46 47 48 Expected return on plan assets (60 ) (57 ) (52 ) Amortization of prior service credit (29 ) (32 ) (32 ) Amortization of net loss - - 13 $ (14 ) $ (12 ) $ 19 The changes in the accumulated postretirement benefit obligation, plan assets and funded status were as follows: (Stated in millions) 2017 2016 Change in Projected Benefit Obligations Benefit obligation at beginning of year $ 1,108 $ 1,103 Service cost 29 30 Interest cost 46 47 Contribution by plan participants 8 8 Actuarial gains 71 (32 ) Benefits paid (49 ) (48 ) Benefit obligation at end of year $ 1,213 $ 1,108 Change in Plan Assets Plan assets at fair value at beginning of year $ 952 $ 884 Actual return on plan assets 143 68 Company contributions 40 40 Contributions by plan participants 8 8 Benefits paid (49 ) (48 ) Plan assets at fair value at end of year $ 1,094 $ 952 Unfunded Liability $ (119 ) $ (156 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses $ 36 $ 62 Prior service credit (215 ) (243 ) $ (179 ) $ (181 ) The unfunded liability is included in Postretirement Benefits Consolidated Balance Sheet The assets of the US postretirement medical plan are invested 59% in equity securities and 41% in debt securities at December 31, 2017. The fair value of these assets was primarily determined based on Level Two valuation techniques. A one percentage point change in assumed health care cost trend rates would have the following effects on the amounts reported for the US postretirement medical plan: (Stated in millions) One Percentage One Percentage Point Increase Point Decrease Effect on total service and interest cost components $ 3 $ (3 ) Effect on accumulated postretirement benefit obligation $ 35 $ (30 ) Other Information The expected benefits to be paid under the US and International pension plans as well as the postretirement medical plan are as follows: (Stated in millions) Pension Benefits Postretirement US International Medical Plan 2018 $ 201 $ 281 $ 53 2019 $ 207 $ 294 $ 55 2020 $ 212 $ 307 $ 58 2021 $ 218 $ 320 $ 60 2022 $ 224 $ 333 $ 61 2023-2027 $ 1,215 $ 1,895 $ 333 Included in Accumulated other comprehensive loss Accumulated other comprehensive loss (Stated in millions) Postretirement Pension Plans Medical Plan Net actuarial losses $ 209 $ - Prior service cost (credit) $ 23 $ (28 ) 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 $413 million, $445 million and $565 million in 2017, 2016 and 2015, respectively.

Supplementary Information

Supplementary Information	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Supplementary Information	19. Supplementary Information During 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. Cash paid (refunded) for interest and income taxes was as follows: (Stated in millions) 2017 2016 2015 Interest $ 572 $ 599 $ 346 Income tax $ (44 ) $ 750 $ 1,567 Interest and other income includes the following: (Stated in millions) 2017 2016 2015 Interest income $ 128 $ 110 $ 52 Earnings of equity method investments 96 90 184 $ 224 $ 200 $ 236 The change in Allowance for doubtful accounts (Stated in millions) 2017 2016 2015 Balance at beginning of year $ 397 $ 333 $ 275 Additions 7 123 75 Amounts written off (163 ) (59 ) (17 ) Balance at end of year $ 241 $ 397 $ 333 Revenue in excess of billings related to contracts accounted for under the percentage-of-completion method was $0.3 billion and $0.5 billion at December 31, 2017 and 2016, respectively. Accounts payable and accrued liabilities are summarized as follows: (Stated in millions) 2017 2016 Payroll, vacation and employee benefits $ 1,296 $ 1,349 Trade 4,614 4,004 Deferred revenue 752 1,088 Other 3,374 3,575 $ 10,036 $ 10,016

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
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; revenue recognized under the percentage-of-completion method; 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 is recognized for certain long-term construction-type contracts based on the percentage-of-completion method. These contracts involve significant design and engineering efforts in order to satisfy custom designs for customer-specific applications. Under the percentage-of-completion method, revenue is recognized as work progresses on each such contract. Progress is measured by the ratio of actual costs incurred to date on the project in relation to total estimated project costs. Any expected losses on a project are recorded in full in the period in which they become probable. Progress billings are generally issued upon completion of certain phases of work as stipulated in the contract. Revenue in excess of billings is included within Receivables less allowance for doubtful accounts Consolidated Balance Sheet Accounts payable and accrued liabilities Consolidated Balance Sheet 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 its 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 Investments	Short-term Investments The Consolidated Balance Sheet Short-term investments For purposes of the Consolidated Statement of Cash Flows Short-term investments
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 Accumulated other comprehensive loss Equity and cost method investments as well as investments in available-for-sale marketable securities are classified as Investments in Affiliated Companies Consolidated Balance Sheet
Multiclient Seismic Data	Multiclient Seismic Data Schlumberger’s 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 services 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 involve 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 managing production on behalf of Schlumberger’s clients under long-term agreements. Schlumberger will invest its own services and 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 includes certain arrangements whereby Schlumberger is only compensated based upon incremental production it helps deliver above a mutually agreed baseline. Revenue from SPM arrangements, which is recognized as the related production is achieved, represented less than 5% of Schlumberger’s consolidated revenue during each of 2017, 2016 and 2015. 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. These capitalized investments are amortized to the Consolidated Statement of Income (Loss) During 2017, Schlumberger purchased a majority non-operating interest in the Palliser Block, located in Alberta, Canada. In connection with the initial accounting for this transaction, Schlumberger recorded a $268 million asset retirement obligation, which was included in both Other Assets Other Liabilities Consolidated Balance Sheet The unamortized portion of Schlumberger’s investments in SPM projects was $4.065 billion and $2.458 billion at December 31, 2017 and 2016, respectively. These amounts are included within Other Assets 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 exposures, 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. Accounts receivable in the United States represented approximately 23% of Schlumberger’s accounts receivable balance at December 31, 2017. No other country accounted for greater than 10% of Schlumberger’s accounts receivable balance.
Earnings per Share	Earnings per Share The following is a reconciliation from basic to diluted earnings (loss) per share of Schlumberger for each of the last three years: (Stated in millions, except per share amounts) Net Income (Loss) Attributable to Schlumberger Average Shares Outstanding Earnings (Loss) per Share 2017: Basic $ (1,505 ) 1,388 $ (1.08 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (1,505 ) 1,388 $ (1.08 ) 2016: Basic $ (1,687 ) 1,357 $ (1.24 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (1,687 ) 1,357 $ (1.24 ) 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 The number of outstanding employee stock options to purchase shares of Schlumberger common stock and unvested restricted stock units that were not included in the computation of diluted earnings/loss per share, because to do so would have had an anti-dilutive effect, were as follows: (Stated in millions) 2017 2016 2015 Employee stock options 47 47 20 Unvested restricted stock 5 5 -
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 In February 2016, the FASB issued ASU No. 2016-02, Leases Consolidated Balance Sheet
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation.

Summary of Accounting Policie29

Summary of Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Reconciliation of Earnings Per Share	The following is a reconciliation from basic to diluted earnings (loss) per share of Schlumberger for each of the last three years: (Stated in millions, except per share amounts) Net Income (Loss) Attributable to Schlumberger Average Shares Outstanding Earnings (Loss) per Share 2017: Basic $ (1,505 ) 1,388 $ (1.08 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (1,505 ) 1,388 $ (1.08 ) 2016: Basic $ (1,687 ) 1,357 $ (1.24 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (1,687 ) 1,357 $ (1.24 ) 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
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The number of outstanding employee stock options to purchase shares of Schlumberger common stock and unvested restricted stock units that were not included in the computation of diluted earnings/loss per share, because to do so would have had an anti-dilutive effect, were as follows: (Stated in millions) 2017 2016 2015 Employee stock options 47 47 20 Unvested restricted stock 5 5 -

Charges and Credits (Tables)

Charges and Credits (Tables)	12 Months Ended
	Dec. 31, 2017
Restructuring And Related Activities [Abstract]
Summary of Charges and Credits	The following is a summary of these charges and credits, of which $3.211 billion were classified as Impairments & other Cost of sales Merger & integration Consolidated Statement of Income (Loss) (Stated in millions) Noncontrolling Pretax Tax Interests Net Impairment & other WesternGeco seismic restructuring charges $ 1,114 $ 20 $ - $ 1,094 Venezuela investment write-down 938 - - 938 Promissory note fair value adjustment and other 510 - 12 498 Workforce reductions 247 13 - 234 Multiclient seismic data impairment 246 81 - 165 Other restructuring charges 156 10 22 124 Cost of sales - - Provision for loss on long-term construction project 245 22 - 223 Merger & integration - - Merger and integration-related costs 308 70 - 238 US tax reform charge - (76 ) - 76 $ 3,764 $ 140 $ 34 $ 3,590 The following is a summary of these charges and credits, of which $3.172 billion were classified as Impairments & other, Merger & integration Cost of sales Consolidated Statement of Income (Loss) (Stated in millions) Pretax Tax Net Impairment & other Workforce reductions $ 880 $ 69 $ 811 Other fixed asset impairments 684 52 632 Inventory write-downs 616 49 567 North America pressure pumping asset impairments 209 67 142 Multiclient seismic data impairment 198 62 136 Facility impairments 165 58 107 Facility closure costs 165 40 125 Costs associated with exiting certain activities 98 23 75 Currency devaluation loss in Egypt 63 - 63 Contract termination costs 39 9 30 Other restructuring charges 55 - 55 Merger & integration Other merger and integration-related 160 28 132 Merger-related employee benefits 83 13 70 Facility closure costs 61 13 48 Professional fees 45 10 35 Cost of sales Amortization of inventory fair value adjustment 299 90 209 $ 3,820 $ 583 $ 3,237 The following is a summary of these charges and credits, all of which were classified as Impairments & other Consolidated Statement of Income (Loss) (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

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2017
Business Combinations [Abstract]
Schedule of Fair Value of Consideration Transferred to Effect Acquisition	The fair value of the consideration transferred to effect the acquisition of Cameron was as follows: (stated in millions, except exchange ratio and per share amounts) Equity consideration: Number of shares of Cameron stock outstanding 192 Exchange ratio 0.716 Schlumberger shares of common stock issued 138 Schlumberger closing stock share price on April 1, 2016 $ 72.12 Equity consideration $ 9,924 Cash consideration: Number of shares of Cameron stock outstanding 192 Cash consideration per Cameron share $ 14.44 Cash consideration 2,776 Other: Fair value of replacement equity awards 103 Total fair value of the consideration transferred $ 12,803
Schedule of Fair Values of Identifiable Assets Acquired and Liabilities Assumed	The following amounts represent the fair value of assets acquired and liabilities assumed in the merger. (Stated in millions) Cash $ 785 Short-term investments 1,448 Accounts receivable 1,669 Inventories (1) 2,350 Fixed assets 1,320 Intangible assets: Customer relationships (weighted-average life of 25 years) 2,371 Technology/Technical know-how (weighted-average life of 16 years) 1,736 Tradenames (weighted-average life of 25 years) 1,225 Other assets 511 Accounts payable and accrued liabilities (2,604 ) Long-term debt (2) (3,018 ) Deferred taxes (3) (1,343 ) Other liabilities (538 ) Sub-total $ 5,912 Less: Investment in OneSubsea (4) (2,065 ) Noncontrolling interests (57 ) Total identifiable net assets $ 3,790 Goodwill (5) 9,013 Total consideration transferred $ 12,803 (1) Cost of sales (2) (3) (4) (5)
Schedule of Supplemental Pro Forma Financial Information from Results of Operations	The supplemental pro forma financial information presented below is unaudited and does not include any anticipated cost savings or the expected realization of other synergies associated with this transaction. Accordingly, this supplemental pro forma financial information is presented for informational purposes only and is not necessarily indicative of what the actual results of operations of the combined company would have been had the acquisition occurred on January 1, 2015, nor is it indicative of future results of operations. (Stated in millions, except per share amounts) 2016 2015 Revenue $ 29,438 $ 44,306 Net income (loss) attributable to Schlumberger $ (1,419 ) $ 2,000 Diluted earnings (loss) per share $ (1.02 ) $ 1.42

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2017
Inventory Disclosure [Abstract]
Summary of Inventory	A summary of inventories, which are stated at the lower of average cost or market, follows: (Stated in millions) 2017 2016 Raw materials & field materials $ 1,846 $ 1,720 Work in progress 503 610 Finished goods 1,697 1,895 $ 4,046 $ 4,225

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Summary of Fixed Assets	A summary of fixed assets follows: (Stated in millions) 2017 2016 Land $ 428 $ 479 Buildings & improvements 5,122 4,849 Machinery & equipment 32,160 33,834 Seismic vessels 103 846 37,813 40,008 Less: Accumulated depreciation 26,237 27,187 $ 11,576 $ 12,821

Multiclient Seismic Data (Table

Multiclient Seismic Data (Tables)	12 Months Ended
	Dec. 31, 2017
Multiclient Seismic Data [Abstract]
Change in Carrying Amount of Multiclient Seismic Data	The change in the carrying amount of multiclient seismic data is as follows: (Stated in millions) 2017 2016 Balance at beginning of year $ 1,073 $ 1,026 Capitalized in period 276 630 Charged to expense (377 ) (385 ) Impairment charge (see Note 3) (245 ) (198 ) $ 727 $ 1,073

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2017
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 Cameron Total Balance, January 1, 2016 $ 3,798 $ 8,584 $ 3,223 $ - $ 15,605 Acquisition of Cameron 790 1,490 1,170 5,563 9,013 Other acquisitions 79 24 242 - 345 Reallocation 146 - - (146 ) - Impact of changes in exchange rates 7 16 4 - 27 Balance, December 31, 2016 4,820 10,114 4,639 5,417 24,990 Acquisitions 21 3 46 24 94 Impact of changes in exchange rates 7 9 12 6 34 Balance, December 31, 2017 $ 4,848 $ 10,126 $ 4,697 $ 5,447 $ 25,118

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets by Major Class	A summary of intangible assets follows: (Stated in millions) 2017 2016 Gross Accumulated Net Book Gross Accumulated Net Book Book Amortization Value Book Value Amortization Value Customer Relationships $ 4,832 $ 1,020 $ 3,812 $ 4,938 $ 865 $ 4,073 Technology/Technical Know-How 3,634 1,078 2,556 3,655 835 2,820 Tradenames 2,806 533 2,273 2,847 458 2,389 Other 1,295 582 713 1,122 549 573 $ 12,567 $ 3,213 $ 9,354 $ 12,562 $ 2,707 $ 9,855

Long-term Debt and Debt Facil37

Long-term Debt and Debt Facility Agreements (Tables)	12 Months Ended
	Dec. 31, 2017
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt consists of the following: (Stated in millions) 2017 2016 4.00% Senior Notes due 2025 $ 1,741 $ 1,740 3.30% Senior Notes due 2021 1,595 1,594 3.00% Senior Notes due 2020 1,593 1,591 3.65% Senior Notes due 2023 1,492 1,491 4.20% Senior Notes due 2021 1,100 1,100 2.40% Senior Notes due 2022 996 996 3.63% Senior Notes due 2022 846 845 0.63% Guaranteed Notes due 2019 712 622 1.50% Guaranteed Notes due 2019 (1) 603 536 2.65% Senior Notes due 2022 598 - 2.20% Senior Notes due 2020 498 - 7.00% Notes due 2038 (2) 212 214 4.50% Notes due 2021 (2) 135 137 5.95% Notes due 2041 (2) 115 116 3.60% Notes due 2022 (2) 110 110 5.13% Notes due 2043 (2) 99 99 4.00% Notes due 2023 (2) 82 83 3.70% Notes due 2024 (2) 56 56 2.35% Senior Notes due 2018 - 1,297 6.38% Notes due 2018 (2) - 297 Commercial paper borrowings 1,694 2,421 Other 598 1,118 $ 14,875 $ 16,463 (1) ( 2 )

Derivative Instruments and He38

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Effect of Derivative Instruments Designated as Fair Value Hedges and Not Designated as Hedges on Consolidated Statement of Income (Loss)	The effect of derivative instruments designated as fair value hedges and those not designated as hedges on the Consolidated Statement of Income (Loss) (Stated in millions) Gain (Loss) Recognized in Income 2017 2016 2015 Consolidated of Income (Loss) Classification Derivatives designated as fair value hedges: Cross currency swaps $ 73 $ (31 ) $ (64 ) Interest Derivatives not designated as hedges: Cross currency swaps $ (8 ) $ - $ - Interest Foreign exchange contracts (26 ) (246 ) (154 ) Cost of services/sales $ (34 ) $ (246 ) $ (154 )

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2017
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss consists of the following: (Stated in millions) Pension and Currency Other Translation Marketable Cash Flow Postretirement Adjustments Securities Hedges Benefit Plans Total Balance, January 1, 2015 $ (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 income (loss) before reclassifications (83 ) 21 (101 ) (289 ) (452 ) Amounts reclassified from accumulated other comprehensive loss - - 121 259 380 Income taxes - - - (13 ) (13 ) Balance, December 31, 2016 (2,136 ) 21 (19 ) (2,509 ) (4,643 ) Other comprehensive income (loss) before reclassifications (3 ) (8 ) 22 134 145 Amounts reclassified from accumulated other comprehensive loss - - - 239 239 Income taxes - - - (15 ) (15 ) Balance, December 31, 2017 $ (2,139 ) $ 13 $ 3 $ (2,151 ) $ (4,274 )

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2017
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: 2017 2016 2015 Dividend yield 2.3 % 2.7 % 2.3 % Expected volatility 27 % 30 % 36 % Risk-free interest rate 2.4 % 1.7 % 1.7 % Expected option life in years 7.0 7.0 7.0 Weighted-average fair value per share $ 20.85 $ 17.45 $ 25.96
Options Outstanding and Option Exercisable	The following table summarizes information related to options outstanding and options exercisable as of December 31, 2017: (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 5,696 4.8 $ 56.17 4,132 $ 53.91 $68.51 - $71.06 6,665 4.0 $ 69.93 6,008 $ 69.82 $72.11 - $79.85 9,107 5.5 $ 73.97 7,033 $ 73.08 $80.53 - $87.38 15,511 6.1 $ 84.01 7,186 $ 83.68 $88.61 - $114.83 10,231 6.2 $ 95.07 5,960 $ 95.32 47,210 5.6 $ 79.13 30,319 $ 76.71
Summary of Stock Option Activity	The following table summarizes stock option activity during the years ended December 31, 2017, 2016 and 2015: (Shares stated in thousands) 2017 2016 2015 Weighted- Weighted- Weighted- Average Average Average Exercise Exercise Exercise Shares Price Shares Price Shares Price Outstanding at beginning of year 46,502 $ 78.31 41,087 $ 78.73 38,583 $ 76.10 Granted 5,024 $ 86.55 7,672 $ 76.14 7,118 $ 86.86 Assumed in Cameron transaction - $ - 3,088 $ 63.24 - $ - Exercised (1,156 ) $ 57.87 (3,357 ) $ 60.70 (2,561 ) $ 60.10 Forfeited (3,160 ) $ 86.99 (1,988 ) $ 84.60 (2,053 ) $ 80.34 Outstanding at year-end 47,210 $ 79.13 46,502 $ 78.31 41,087 $ 78.73
Restricted Stock Transactions	The following table summarizes information related to restricted stock transactions: (Shares stated in thousands) 2017 2016 2015 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 5,112 $ 78.31 3,571 $ 85.04 4,138 $ 80.80 Granted 2,495 $ 73.09 1,678 $ 68.66 1,254 $ 82.37 Assumed in Cameron transaction - $ - 1,824 $ 72.12 - $ - Vested (1,645 ) $ 83.03 (1,720 ) $ 72.64 (1,495 ) $ 71.30 Forfeited (534 ) $ 80.17 (241 ) $ 80.87 (326 ) $ 83.86 Unvested at year-end 5,428 $ 72.33 5,112 $ 78.31 3,571 $ 85.04
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: 2017 2016 2015 Dividend yield 2.7 % 2.7 % 2.3 % Expected volatility 19 % 25 % 27 % Risk-free interest rate 1.0 % 0.5 % 0.2 % Weighted-average fair value per share $ 9.46 $ 10.37 $ 12.45
Stock-Based Compensation Expense Recognized in Income	The following summarizes stock-based compensation expense recognized in income: (Stated in millions) 2017 2016 2015 Stock options $ 161 $ 175 $ 176 Restricted stock 148 47 107 DSPP 34 45 43 $ 343 $ 267 $ 326

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Income (Loss) Before Taxes	Income (loss) before taxes subject to United States and non-United States income taxes was as follows: (Stated in millions) 2017 2016 2015 United States $ (841 ) $ (3,103 ) $ (691 ) Outside United States (342 ) 1,198 3,572 $ (1,183 ) $ (1,905 ) $ 2,881
Components of Net Deferred Tax Assets (Liabilities)	The components of net deferred tax assets (liabilities) were as follows: (Stated in millions) 2017 2016 Postretirement benefits $ 135 $ 253 Intangible assets (2,186 ) (2,869 ) Investments in non-US subsidiaries (224 ) (271 ) Fixed assets, net (55 ) (79 ) Inventories 126 248 Other, net 554 838 $ (1,650 ) $ (1,880 )
Components of Tax Expense (Benefit)	The components of Tax expense (benefit) (Stated in millions) 2017 2016 2015 Current: United States-Federal $ (170 ) $ (511 ) $ 90 United States-State 57 (36 ) 12 Outside United States 703 648 1,085 590 101 1,187 Deferred: United States-Federal $ (225 ) $ (352 ) $ (356 ) United States-State 4 (13 ) (19 ) Outside United States (47 ) (51 ) (52 ) Valuation allowance 8 37 (14 ) (260 ) (379 ) (441 ) $ 330 $ (278 ) $ 746
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: 2017 2016 2015 US federal statutory rate 35 % 35 % 35 % State tax - 2 - Non-US income taxed at different rates (24 ) (21 ) (13 ) Charges and credits (See Note 3) (40 ) (1 ) 6 Enactment of US tax reform (6 ) - - Other 7 - (2 ) (28 )% 15 % 26 %
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, 2017, 2016 and 2015 is as follows: (Stated in millions) 2017 2016 2015 Balance at beginning of year $ 1,419 $ 1,285 $ 1,402 Additions based on tax positions related to the current year 132 70 140 Additions for tax positions of prior years 58 119 136 Additions related to acquisitions - 127 5 Impact of changes in exchange rates 23 (25 ) (78 ) Settlements with tax authorities (41 ) (45 ) (99 ) Reductions for tax positions of prior years (157 ) (85 ) (203 ) Reductions due to the lapse of the applicable statute of limitations (41 ) (27 ) (18 ) Balance at end of year $ 1,393 $ 1,419 $ 1,285
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 2012 - 2017 Canada 2010 - 2017 Ecuador 2014 - 2017 Mexico 2011 - 2017 Norway 2013 - 2017 Russia 2014 - 2017 Saudi Arabia 2004 - 2017 United Kingdom 2015 - 2017 United States 2014 - 2017

Leases and Lease Commitments (T

Leases and Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2017
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) 2018 $ 284 2019 244 2020 203 2021 164 2022 127 Thereafter 410 $ 1,432

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Financial information for the years ended December 31, 2017, 2016 and 2015, by segment, is as follows: (Stated in millions) 2017 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Expenditures Reservoir Characterization $ 6,786 $ 1,251 $ 4,892 $ 988 $ 305 Drilling 8,392 1,151 5,421 685 629 Production 10,639 928 12,326 1,249 889 Cameron 5,205 733 3,978 264 150 Eliminations & other (582 ) (142 ) 1,881 213 134 Pretax operating income 3,921 Goodwill and intangible assets 34,472 Cash and short term investments 5,089 All other assets 3,928 Corporate & other (1) (934 ) 438 Interest income (2) 107 Interest expense (3) (513 ) Charges & credits (4) (3,764 ) $ 30,440 $ (1,183 ) $ 71,987 $ 3,837 $ 2,107 (Stated in millions) 2016 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Expenditures Reservoir Characterization $ 6,648 $ 1,249 $ 6,890 $ 1,104 $ 532 Drilling 8,561 994 6,747 904 425 Production 8,804 507 10,476 1,234 655 Cameron 4,211 653 4,246 211 176 Eliminations & other (414 ) (130 ) 1,605 257 267 Pretax operating income 3,273 Goodwill and intangible assets 34,845 Cash, short term investments and fixed income investments 9,495 All other assets 3,652 Corporate & other (1) (925 ) 384 Interest income (2) 84 Interest expense (3) (517 ) Charges & credits (4) (3,820 ) $ 27,810 $ (1,905 ) $ 77,956 $ 4,094 $ 2,055 (Stated in millions) 2015 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Expenditures Reservoir Characterization $ 9,501 $ 2,450 $ 8,266 $ 1,279 $ 648 Drilling 13,563 2,538 8,562 1,177 673 Production 12,548 1,585 9,938 1,216 824 Eliminations & other (137 ) (63 ) 2,039 213 265 Pretax operating income 6,510 Goodwill and intangible assets 20,174 Cash, short term investments and fixed income investments 13,452 All other assets 5,574 Corporate & other (1) (768 ) 193 Interest income (2) 30 Interest expense (3) (316 ) Charges & credits (4) (2,575 ) $ 35,475 $ 2,881 $ 68,005 $ 4,078 $ 2,410 (1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets (including intangible asset amortization expense resulting from the 2016 acquisition of Cameron), certain centrally managed initiatives and other nonoperating items. (2) Interest income excludes amounts which are included in the segments’ income (2017: $21 million; 2016: $26 million; 2015: $22 million). (3) Interest expense excludes amounts which are included in the segments’ income (2017: $53 million; 2016: $53 million; 2015: $30 million). (4) See Note 3 – Charges and Credits .
Revenue by Geographic Area	Revenue by geographic area for the years ended December 31, 2017, 2016 and 2015 is as follows: (Stated in millions) 2017 2016 2015 North America $ 9,487 $ 6,665 $ 9,811 Latin America 3,976 4,230 6,014 Europe/CIS/Africa 7,047 7,351 9,284 Middle East & Asia 9,419 9,286 9,898 Eliminations & other 511 278 468 $ 30,440 $ 27,810 $ 35,475
Fixed Assets Less Accumulated Depreciation by Geographic Area	Fixed Assets less accumulated depreciation by geographic area are as follows: (Stated in millions) 2017 2016 2015 North America $ 5,120 $ 4,428 $ 4,392 Latin America 1,042 1,460 1,728 Europe/CIS/Africa 2,540 2,706 2,978 Middle East & Asia 2,771 3,149 3,078 Unallocated (1) 103 1,078 1,239 $ 11,576 $ 12,821 $ 13,415 (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, 2017
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 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 2017 2016 2015 2017 2016 2015 Discount rate 4.20 % 4.50 % 4.15 % 4.13 % 4.36 % 4.07 % Compensation increases 4.00 % 4.00 % 4.00 % 4.81 % 4.81 % 4.79 % Return on plan assets 7.25 % 7.25 % 7.25 % 7.40 % 7.40 % 7.40 %
Net Pension Cost (Credit) for Schlumberger Pension Plans and US Postretirement Medical Plan	Net pension cost for 2017, 2016 and 2015 included the following components: (Stated in millions) US International 2017 2016 2015 2017 2016 2015 Service cost - benefits earned during the period $ 57 $ 62 $ 86 $ 95 $ 110 $ 167 Interest cost on projected benefit obligation 175 177 170 306 311 297 Expected return on plan assets (242 ) (235 ) (229 ) (541 ) (517 ) (498 ) Amortization of prior service cost 12 12 12 97 122 121 Amortization of net loss 39 79 123 120 78 170 $ 41 $ 95 $ 162 $ 77 $ 104 $ 257 The net periodic benefit cost (credit) for the US postretirement medical plan included the following components: (Stated in millions) 2017 2016 2015 Service cost $ 29 $ 30 $ 42 Interest cost 46 47 48 Expected return on plan assets (60 ) (57 ) (52 ) Amortization of prior service credit (29 ) (32 ) (32 ) Amortization of net loss - - 13 $ (14 ) $ (12 ) $ 19
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 2017 2016 2017 2016 Discount rate 3.70 % 4.20 % 3.55 % 4.13 % Compensation increases 4.00 % 4.00 % 4.81 % 4.81 %
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 2017 2016 2017 2016 Change in Projected Benefit Obligations Projected benefit obligation at beginning of year $ 4,240 $ 4,025 $ 7,793 $ 7,340 Service cost 57 62 95 110 Interest cost 175 177 306 311 Contribution by plan participants - - 88 117 Actuarial (gains) losses 325 137 616 477 Currency effect - - 147 (290 ) Benefits paid (194 ) (183 ) (293 ) (272 ) Other - 22 - - Projected benefit obligation at end of year $ 4,603 $ 4,240 $ 8,752 $ 7,793 Change in Plan Assets Plan assets at fair value at beginning of year $ 3,625 $ 3,467 $ 7,194 $ 6,832 Actual return on plan assets 622 320 1,216 715 Currency effect - - 161 (318 ) Company contributions 5 4 88 130 Contributions by plan participants - - 88 117 Benefits paid (194 ) (183 ) (293 ) (272 ) Other - 17 53 (10 ) Plan assets at fair value at end of year $ 4,058 $ 3,625 $ 8,507 $ 7,194 Unfunded Liability $ (545 ) $ (615 ) $ (245 ) $ (599 ) Amounts Recognized in Balance Sheet Postretirement Benefits $ (545 ) $ (615 ) $ (418 ) $ (724 ) Other Assets - - 173 125 $ (545 ) $ (615 ) $ (245 ) $ (599 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses $ 887 $ 982 $ 1,419 $ 1,644 Prior service cost 30 42 17 114 $ 917 $ 1,024 $ 1,436 $ 1,758 Accumulated benefit obligation $ 4,347 $ 3,999 $ 8,400 $ 7,454
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 2017 2016 Target 2017 2016 Equity securities 37 - 56 % 51 % 52 % 45 - 71 % 64 % 64 % Debt securities 35 - 62 38 37 20 - 35 23 25 Cash and cash equivalents 0 - 3 3 2 0 - 5 4 2 Alternative investments 0 - 10 8 9 0 - 25 9 9 100 % 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, 2017 and 2016, 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 2017 2016 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 112 $ 92 $ 20 $ - $ 60 $ 15 $ 45 $ - Equity Securities: US (a) 1,324 1,148 176 1,210 1,049 161 International (b) 757 747 10 662 649 13 Debt Securities Corporate bonds (c) 771 771 625 625 Government and government-related debt securities (d) 656 163 493 643 164 479 Collateralized mortgage obligations and mortgage backed securities (e) 108 108 92 92 Alternative Investments: Private equity (f) 183 183 191 191 Real estate (g) 147 147 142 142 Total $ 4,058 $ 2,150 $ 1,578 $ 330 $ 3,625 $ 1,877 $ 1,415 $ 333 (Stated in millions) International Plan Assets 2017 2016 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 307 $ 69 $ 238 $ - $ 184 $ 135 $ 49 $ - Equity Securities: US (a) 3,286 2,642 644 2,854 2,324 530 International (b) 2,160 1,871 289 1,726 1,475 251 Debt Securities Corporate bonds (c) 841 841 685 685 Government and government-related debt securities (d) 985 11 974 1,001 10 991 Collateralized mortgage obligations and mortgage backed securities (e) 150 150 130 130 Alternative Investments: Private equity (f) 477 477 385 385 Real estate (g) 168 168 106 106 Other 133 133 123 123 Total $ 8,507 $ 4,593 $ 3,136 $ 778 $ 7,194 $ 3,944 $ 2,636 $ 614 (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 funds of funds. (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 2017 2016 2017 2016 2015 Discount rate 3.70 % 4.20 % 4.20 % 4.50 % 4.15 % Return on plan assets - - 7.00 % 7.00 % 7.00 % Current medical cost trend rate 7.25 % 7.25 % 7.25 % 7.50 % 7.00 % Ultimate medical cost trend rate 5.00 % 5.00 % 5.00 % 5.00 % 5.00 % Year that the rate reaches the ultimate trend rate 2026 2026 2026 2026 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) 2017 2016 Change in Projected Benefit Obligations Benefit obligation at beginning of year $ 1,108 $ 1,103 Service cost 29 30 Interest cost 46 47 Contribution by plan participants 8 8 Actuarial gains 71 (32 ) Benefits paid (49 ) (48 ) Benefit obligation at end of year $ 1,213 $ 1,108 Change in Plan Assets Plan assets at fair value at beginning of year $ 952 $ 884 Actual return on plan assets 143 68 Company contributions 40 40 Contributions by plan participants 8 8 Benefits paid (49 ) (48 ) Plan assets at fair value at end of year $ 1,094 $ 952 Unfunded Liability $ (119 ) $ (156 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses $ 36 $ 62 Prior service credit (215 ) (243 ) $ (179 ) $ (181 )
Effect of One Percentage Point Change in Assumed Health Care Cost Trend Rates	A one percentage point change in assumed health care cost trend rates would have the following effects on the amounts reported for the US postretirement medical plan: (Stated in millions) One Percentage One Percentage Point Increase Point Decrease Effect on total service and interest cost components $ 3 $ (3 ) Effect on accumulated postretirement benefit obligation $ 35 $ (30 )
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 are as follows: (Stated in millions) Pension Benefits Postretirement US International Medical Plan 2018 $ 201 $ 281 $ 53 2019 $ 207 $ 294 $ 55 2020 $ 212 $ 307 $ 58 2021 $ 218 $ 320 $ 60 2022 $ 224 $ 333 $ 61 2023-2027 $ 1,215 $ 1,895 $ 333
Defined Benefit Plan, Amounts that will be Amortized from Accumulated Other Comprehensive Income (Loss) In Next Fiscal Year	Included in Accumulated other comprehensive loss Accumulated other comprehensive loss (Stated in millions) Postretirement Pension Plans Medical Plan Net actuarial losses $ 209 $ - Prior service cost (credit) $ 23 $ (28 )

Supplementary Information (Tabl

Supplementary Information (Tables)	12 Months Ended
	Dec. 31, 2017
Segment Reporting [Abstract]
Cash Paid (Refunded) for Interest and Income Taxes	Cash paid (refunded) for interest and income taxes was as follows: (Stated in millions) 2017 2016 2015 Interest $ 572 $ 599 $ 346 Income tax $ (44 ) $ 750 $ 1,567
Interest and Other Income	Interest and other income includes the following: (Stated in millions) 2017 2016 2015 Interest income $ 128 $ 110 $ 52 Earnings of equity method investments 96 90 184 $ 224 $ 200 $ 236
Change in Allowance for Doubtful Accounts	The change in Allowance for doubtful accounts (Stated in millions) 2017 2016 2015 Balance at beginning of year $ 397 $ 333 $ 275 Additions 7 123 75 Amounts written off (163 ) (59 ) (17 ) Balance at end of year $ 241 $ 397 $ 333
Accounts Payable and Accrued Liabilities	Revenue in excess of billings related to contracts accounted for under the percentage-of-completion method was $0.3 billion and $0.5 billion at December 31, 2017 and 2016, respectively. Accounts payable and accrued liabilities are summarized as follows: (Stated in millions) 2017 2016 Payroll, vacation and employee benefits $ 1,296 $ 1,349 Trade 4,614 4,004 Deferred revenue 752 1,088 Other 3,374 3,575 $ 10,036 $ 10,016

Summary of Accounting Policie46

Summary of Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)Country	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Feb. 29, 2016USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]
Amortization expenses of capitalized investments	$ 465	$ 449	$ 317
Number of countries in which Schlumberger conducts business | Country	85
Number of reportable segments accounted for greater than 10% of accounts receivable | Country	0
ASU No. 2016-02
Organization And Summary Of Significant Accounting Policies [Line Items]
New accounting pronouncement or change in accounting principle effect of additional assets and liabilities				$ 1,200
United States | Customer Concentration Risk
Organization And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	23.00%
Other Assets and Other Liabilities | Canada
Organization And Summary Of Significant Accounting Policies [Line Items]
Asset retirement obligation	$ 268
Minimum
Organization And Summary Of Significant Accounting Policies [Line Items]
Number of countries in which Schlumberger conducts business | Country	85
Schlumberger Production Management
Organization And Summary Of Significant Accounting Policies [Line Items]
Unamortized investments	$ 4,065	$ 2,458
Schlumberger Production Management | Revenue | Maximum
Organization And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	5.00%	5.00%	5.00%

Summary of Accounting Policie47

Summary of Accounting Policies - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net Income (Loss) Attributable to Schlumberger
Basic	$ (1,505)	$ (1,687)	$ 2,072
Diluted	$ (1,505)	$ (1,687)	$ 2,072
Average Shares Outstanding
Basic	1,388	1,357	1,267
Assumed exercise of stock options			4
Unvested restricted stock			4
Diluted	1,388	1,357	1,275
Earnings (Loss) per Share
Basic	$ (1.08)	$ (1.24)	$ 1.63
Diluted	$ (1.08)	$ (1.24)	$ 1.63

Summary of Accounting Policie48

Summary of Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares shares in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Employee Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	47	47	20
Unvested Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	5	5

Charges and Credits - Additiona

Charges and Credits - Additional Information (Detail) $ in Millions	Apr. 02, 2016USD ($)	Dec. 31, 2017USD ($)	Jun. 30, 2017USD ($)	Dec. 31, 2016USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)	Mar. 31, 2015USD ($)VEF / $	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 1,025	$ 50					$ 3,764	$ 3,820
Charges and credits, Net								3,590	3,237
Charge relating to one-time mandatory tax on previously deferred foreign earnings		410						410
Tax credits resulting from remeasurement of net deferred tax liabilities		334
Net deferred tax liability		1,650		$ 1,880				1,650	1,880
Promissory note in exchange of accounts receivable			$ 700
Promissory note term			3 years
Promissory note interest rate			6.50%
Debt instrument fair value		15,200		16,800				15,200	16,800
Restructuring and other charges								3,764	3,820	$ 2,575
Exchange rate | VEF / $							192
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
Impairment of Equity Method Investment
Charges And Credits [Line Items]
Impairment and restructuring charges						15
Promissory Note Fair Value Adjustment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 460					510
Charges and credits, Net								498
Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 349							308	349
Merger and Integration | Cameron
Charges And Credits [Line Items]
Charges and credits, Pretax								308
Merger and Integration | Cameron | Inventory fair value adjustments
Charges And Credits [Line Items]
Charges and credits, Pretax	299
Impairment And Other
Charges And Credits [Line Items]
Charges and credits, Pretax								3,211	3,172
Cost of Sales
Charges And Credits [Line Items]
Charges and credits, Pretax								$ 245	299
Lease termination facility
Charges And Credits [Line Items]
Restructuring charges				302
Lease termination costs
Charges And Credits [Line Items]
Impairment and restructuring charges						177
US tax reform
Charges And Credits [Line Items]
Charges and credits, Net		76
US tax reform | Tax Year2018
Charges And Credits [Line Items]
Reduced corporate income tax rate								21.00%
Promissory Notes
Charges And Credits [Line Items]
Debt instrument fair value		135						$ 135
Venezuela
Charges And Credits [Line Items]
Charges and credits, Pretax		938
North America | Lower-Tier Drilling Rigs | Pressure Pumping And Other Equipment
Charges And Credits [Line Items]
Impairment and restructuring charges						776
Land seismic business
Charges And Credits [Line Items]
Impairment charge, Pretax		90
Vessel write-down
Charges And Credits [Line Items]
Charges and credits, Pretax		786
Impairment of intangible ssets
Charges And Credits [Line Items]
Charges and credits, Pretax		78
Inventory Write Down
Charges And Credits [Line Items]
Charges and credits, Pretax		59
Impairment and other charges					$ 616
Inventory Write Down | North America
Charges And Credits [Line Items]
Impairment and restructuring charges						269
Other restructuring costs
Charges And Credits [Line Items]
Charges and credits, Pretax		102
Impairment and other charges					55
Multiclient seismic data impairment
Charges And Credits [Line Items]
Impairment and other charges		246			198
Accounts receivable | Venezuela
Charges And Credits [Line Items]
Charges and credits, Pretax		469
Other-than temporary impairment | Promissory Notes
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 105
Other-than temporary impairment | Venezuela | Promissory Notes
Charges And Credits [Line Items]
Charges and credits, Pretax		105
Fixed assets | Venezuela
Charges And Credits [Line Items]
Charges and credits, Pretax		285
Other assets | Venezuela
Charges And Credits [Line Items]
Charges and credits, Pretax		79
Loss on long-term construction project
Charges And Credits [Line Items]
Charges and credits, Pretax		245
Loss on long-term construction project | Cost of Sales
Charges And Credits [Line Items]
Charges and credits, Pretax								245
Charges and credits, Net								$ 223
Facility and other exit costs
Charges And Credits [Line Items]
Charges and credits, Pretax		156
Workforce reduction
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 247
Restructuring and other charges				234	646	530	$ 390
Facility closure costs | Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax									61
Charges and credits, Net									48
Facility closure costs | Merger and Integration | Cameron
Charges And Credits [Line Items]
Charges and credits, Pretax	61
Facility closure costs | Lease termination facility
Charges And Credits [Line Items]
Restructuring charges				165
Asset write-offs | Lease termination facility
Charges And Credits [Line Items]
Restructuring charges				98
Contract termination costs
Charges And Credits [Line Items]
Impairment and restructuring charges						41
Contract termination costs | Lease termination facility
Charges And Credits [Line Items]
Restructuring charges				39
Currency Devaluation Loss In Egypt
Charges And Credits [Line Items]
Restructuring and other charges				$ 63					63
North America pressure pumping asset impairments
Charges And Credits [Line Items]
Impairment and other charges					209
Facilities impairments | North America
Charges And Credits [Line Items]
Impairment and other charges					165
Other fixed asset impairments
Charges And Credits [Line Items]
Impairment and other charges					$ 684
Merger-related employee benefits | Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax									83
Charges and credits, Net									70
Merger-related employee benefits | Merger and Integration | Cameron
Charges And Credits [Line Items]
Charges and credits, Pretax	83
Professional fees | Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax									45
Charges and credits, Net									35
Professional fees | Merger and Integration | Cameron
Charges And Credits [Line Items]
Charges and credits, Pretax	45
Other merger and integration-related | Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax									160
Charges and credits, Net									$ 132
Other merger and integration-related | Merger and Integration | Cameron
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 160
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
Currency Devaluation Loss In Venezuela
Charges And Credits [Line Items]
Restructuring and other charges							$ 49			$ 49

Charges and Credits - Summary o

Charges and Credits - Summary of Charges and Credits (Detail) - USD ($) $ in Millions	Apr. 02, 2016	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 1,025	$ 50	$ 3,764	$ 3,820
Charges and credits, Tax				140	583
Charges and credits, Noncontolling interests				34
Charges and credits, Net				3,590	3,237
Other restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax		102
Workforce reduction
Charges And Credits [Line Items]
Charges and credits, Pretax		247
Provision for loss on long-term construction project
Charges And Credits [Line Items]
Charges and credits, Pretax		245
Inventory write-downs
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 59
Impairment And Other
Charges And Credits [Line Items]
Charges and credits, Pretax						$ 2,575
Charges and credits, Tax						357
Charges and credits, Net						2,218
Impairment And Other | WesternGeco seismic restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax				1,114
Charges and credits, Tax				20
Charges and credits, Net				1,094
Impairment And Other | Venezuela investment write-down
Charges And Credits [Line Items]
Charges and credits, Pretax				938
Charges and credits, Net				938
Impairment And Other | Multiclient seismic data impairment
Charges And Credits [Line Items]
Charges and credits, Pretax				246	198
Charges and credits, Tax				81	62
Charges and credits, Net				165	136
Impairment And Other | Other restructuring charges
Charges And Credits [Line Items]
Charges and credits, Pretax				156	55	84
Charges and credits, Tax				10		7
Charges and credits, Noncontolling interests				22
Charges and credits, Net				124	55	77
Impairment And Other | Workforce reduction
Charges And Credits [Line Items]
Charges and credits, Pretax				247	880	920
Charges and credits, Tax				13	69	107
Charges and credits, Net				234	811	813
Impairment And Other | Other fixed asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax					684
Charges and credits, Tax					52
Charges and credits, Net					632
Impairment And Other | Inventory write-downs
Charges And Credits [Line Items]
Charges and credits, Pretax					616	269
Charges and credits, Tax					49	27
Charges and credits, Net					567	242
Impairment And Other | North America pressure pumping asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax					209
Charges and credits, Tax					67
Charges and credits, Net					142
Impairment And Other | Facilities impairments
Charges And Credits [Line Items]
Charges and credits, Pretax					165
Charges and credits, Tax					58
Charges and credits, Net					107
Impairment And Other | Facility closure costs
Charges And Credits [Line Items]
Charges and credits, Pretax					165
Charges and credits, Tax					40
Charges and credits, Net					125
Impairment And Other | Costs associated with exiting certain activities
Charges And Credits [Line Items]
Charges and credits, Pretax					98
Charges and credits, Tax					23
Charges and credits, Net					75
Impairment And Other | Currency Devaluation Loss In Egypt
Charges And Credits [Line Items]
Charges and credits, Pretax					63
Charges and credits, Net					63
Impairment And Other | Contract termination costs
Charges And Credits [Line Items]
Charges and credits, Pretax					39	41
Charges and credits, Tax					9	2
Charges and credits, Net					30	39
Impairment And Other | Fixed asset impairments
Charges And Credits [Line Items]
Charges and credits, Pretax						776
Charges and credits, Tax						141
Charges and credits, Net						635
Impairment And Other | Impairment of SPM Project
Charges And Credits [Line Items]
Charges and credits, Pretax						182
Charges and credits, Tax						36
Charges and credits, Net						146
Impairment And Other | Facility closures
Charges And Credits [Line Items]
Charges and credits, Pretax						177
Charges and credits, Tax						37
Charges and credits, Net						140
Impairment And Other | Geopolitical Events
Charges And Credits [Line Items]
Charges and credits, Pretax						77
Charges and credits, Net						77
Impairment And Other | Currency Devaluation Loss In Venezuela
Charges And Credits [Line Items]
Charges and credits, Pretax						49
Charges and credits, Net						$ 49
Promissory Note Fair Value Adjustment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 460	510
Charges and credits, Noncontolling interests				12
Charges and credits, Net				498
Cost of Sales
Charges And Credits [Line Items]
Charges and credits, Pretax				245	299
Cost of Sales | Provision for loss on long-term construction project
Charges And Credits [Line Items]
Charges and credits, Pretax				245
Charges and credits, Tax				22
Charges and credits, Net				223
Cost of Sales | Amortization of inventory fair value adjustment
Charges And Credits [Line Items]
Charges and credits, Pretax					299
Charges and credits, Tax					90
Charges and credits, Net					209
Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 349			308	349
Merger and Integration | Merger and integration-related costs
Charges And Credits [Line Items]
Charges and credits, Pretax				308
Charges and credits, Tax				70
Charges and credits, Net				238
Merger and Integration | Facility closure costs
Charges And Credits [Line Items]
Charges and credits, Pretax					61
Charges and credits, Tax					13
Charges and credits, Net					48
Merger and Integration | Other merger and integration-related
Charges And Credits [Line Items]
Charges and credits, Pretax					160
Charges and credits, Tax					28
Charges and credits, Net					132
Merger and Integration | Merger-related employee benefits
Charges And Credits [Line Items]
Charges and credits, Pretax					83
Charges and credits, Tax					13
Charges and credits, Net					70
Merger and Integration | Professional fees
Charges And Credits [Line Items]
Charges and credits, Pretax					45
Charges and credits, Tax					10
Charges and credits, Net					$ 35
US tax reform charge
Charges And Credits [Line Items]
Charges and credits, Tax				(76)
Charges and credits, Net				$ 76

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	Apr. 02, 2016	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Revenues				$ 29,438	$ 44,306
Acquisitions and investments, net of cash acquired			$ 847	2,398	443
Cameron
Business Acquisition [Line Items]
Common stock received by Cameron shareholders	71.60%
Cash payment in exchange of each share of common stock	$ 14.44
Revenues		$ 4,000
Pretax operating income		$ 700
After-tax merger and integration charges included or excluded in pro forma amounts				285	285
Cameron | Inventory Fair Value Adjustment
Business Acquisition [Line Items]
After-tax amortization charges included in pro forma amounts				209	209
Other Acquisitions
Business Acquisition [Line Items]
Acquisitions and investments, net of cash acquired			$ 847	$ 407	$ 443

Acquisitions - Schedule of Fair

Acquisitions - Schedule of Fair Value of Consideration Transferred to Effect Acquisition (Detail) $ / shares in Units, $ in Millions	Apr. 02, 2016USD ($)$ / sharesshares	Dec. 31, 2017shares	Dec. 31, 2016shares
Equity consideration:
Number of shares of Cameron stock outstanding		1,383,932,776	1,391,475,510
Cash consideration:
Number of shares of Cameron stock outstanding		1,383,932,776	1,391,475,510
Cameron
Equity consideration:
Number of shares of Cameron stock outstanding	192,000,000
Exchange ratio	0.716
Schlumberger shares of common stock issued	138,000,000
Schlumberger closing stock share price on April 1, 2016 | $ / shares	$ 72.12
Equity consideration | $	$ 9,924
Cash consideration:
Number of shares of Cameron stock outstanding	192,000,000
Cash consideration per Cameron share | $ / shares	$ 14.44
Cash consideration | $	$ 2,776
Other:
Fair value of replacement equity awards | $	103
Total fair value of the consideration transferred | $	$ 12,803

Acquisitions - Schedule of Fa53

Acquisitions - Schedule of Fair Values of Identifiable Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Apr. 02, 2016		Dec. 31, 2015
Business Acquisition [Line Items]
Cash				$ 785
Short-term investments				1,448
Accounts receivable				1,669
Inventories	[1]			2,350
Fixed assets				1,320
Intangible assets:
Other assets				511
Accounts payable and accrued liabilities				(2,604)
Long-term debt	[2]			(3,018)
Deferred taxes	[3]			(1,343)
Other liabilities				(538)
Sub-total				5,912
Noncontrolling interests				(57)
Total identifiable net assets				3,790
Goodwill		$ 25,118	$ 24,990	9,013	[4]	$ 15,605
Total consideration transferred				12,803
Customer Relationships
Intangible assets:
Intangible assets				2,371
Technology/Technical know-how
Intangible assets:
Intangible assets				1,736
Tradenames
Intangible assets:
Intangible assets				1,225
OneSubsea
Intangible assets:
Investment in OneSubsea	[5]			$ (2,065)
[1]	Schlumberger recorded an adjustment of $299 million to write-up the acquired inventory to its estimated fair value. Schlumberger’s 2016 Cost of sales reflected this increased valuation.
[2]	In connection with the merger, Schlumberger assumed all of the debt obligations of Cameron, including its $2.75 billion of fixed rate notes. Schlumberger recorded a $244 million adjustment to increase the carrying amount of these notes to their estimated fair value. This adjustment is being amortized as a reduction of interest expense over the remaining term of the respective obligations.
[3]	In connection with the acquisition accounting, Schlumberger provided deferred taxes related to, among other items, the estimated fair value adjustments for acquired inventory, intangible assets and assumed debt obligations.
[4]	The goodwill recognized is primarily attributable to expected synergies that will result from combining the operations of Schlumberger and Cameron, as well as intangible assets which do not qualify for separate recognition. The amount of goodwill that is deductible for income tax purposes is not significant.
[5]	Prior to the completion of the merger, Cameron and Schlumberger operated OneSubsea, a joint venture that manufactured and developed products, systems and services for the subsea oil and gas market, which was 40% owned by Schlumberger and 60% owned by Cameron. OneSubsea is now owned 100% by Schlumberger. As a result of obtaining control of this joint venture, Schlumberger was required to remeasure its previously held equity interest in the joint venture to its acquisition-date fair value. Schlumberger determined that the estimated fair value of its previously held equity interest approximated its carrying value. Accordingly, Schlumberger did not recognize any gain or loss on this transaction.

Acquisitions - Schedule of Fa54

Acquisitions - Schedule of Fair Values of Identifiable Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) $ in Millions	Apr. 02, 2016USD ($)
Business Acquisition [Line Items]
Fair value adjustment to inventory	$ 299
Debt obligations assumed	3,018	[1]
Increase in fair value of notes	$ 244
Customer Relationships
Business Acquisition [Line Items]
Weighted-average life	25 years
Technology/Technical know-how
Business Acquisition [Line Items]
Weighted-average life	16 years
Tradenames
Business Acquisition [Line Items]
Weighted-average life	25 years
Cameron
Business Acquisition [Line Items]
Debt obligations assumed	$ 2,750
OneSubsea
Business Acquisition [Line Items]
Prior to completion of merger, ownership percentage in joint venture	40.00%
Ownership percentage after completion of merger	100.00%
OneSubsea | Cameron
Business Acquisition [Line Items]
Prior to completion of merger, ownership percentage in joint venture by parent	60.00%
[1]	In connection with the merger, Schlumberger assumed all of the debt obligations of Cameron, including its $2.75 billion of fixed rate notes. Schlumberger recorded a $244 million adjustment to increase the carrying amount of these notes to their estimated fair value. This adjustment is being amortized as a reduction of interest expense over the remaining term of the respective obligations.

Acquisitions - Schedule of Supp

Acquisitions - Schedule of Supplemental Pro Forma Financial Information from Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Business Combinations [Abstract]
Revenue	$ 29,438	$ 44,306
Net income (loss) attributable to Schlumberger	$ (1,419)	$ 2,000
Diluted earnings (loss) per share	$ (1.02)	$ 1.42

Inventories - Summary of Invent

Inventories - Summary of Inventory (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials & field materials	$ 1,846	$ 1,720
Work in progress	503	610
Finished goods	1,697	1,895
Inventories	$ 4,046	$ 4,225

Fixed Assets - Summary of Fixed

Fixed Assets - Summary of Fixed Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Fixed assets gross	$ 37,813	$ 40,008
Less: Accumulated depreciation	26,237	27,187
Fixed assets less accumulated depreciation	11,576	12,821	$ 13,415
Land
Property Plant And Equipment [Line Items]
Fixed assets gross	428	479
Buildings & improvements
Property Plant And Equipment [Line Items]
Fixed assets gross	5,122	4,849
Machinery & equipment
Property Plant And Equipment [Line Items]
Fixed assets gross	32,160	33,834
Seismic vessels
Property Plant And Equipment [Line Items]
Fixed assets gross	$ 103	$ 846

Fixed Assets - Additional Infor

Fixed Assets - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Depreciation expense relating to fixed assets	$ 2.3	$ 2.7	$ 3.2
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 - Chan

Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Multiclient Seismic Data [Abstract]
Opening balance	$ 1,073	$ 1,026
Capitalized in period	276	630
Charged to expense	(377)	(385)
Impairment charge (see Note 3)	(245)	(198)
Ending balance	$ 727	$ 1,073

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 24,990	$ 15,605
Acquisitions	94	9,013
Other acquisitions		345
Impact of changes in exchange rates	34	27
Goodwill, Ending Balance	25,118	24,990
Cameron
Goodwill [Line Items]
Goodwill, Beginning Balance	5,417
Acquisitions	24	5,563
Reallocation		(146)
Impact of changes in exchange rates	6
Goodwill, Ending Balance	5,447	5,417
Operating Segments | Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	4,820	3,798
Acquisitions	21	790
Other acquisitions		79
Reallocation		146
Impact of changes in exchange rates	7	7
Goodwill, Ending Balance	4,848	4,820
Operating Segments | Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	10,114	8,584
Acquisitions	3	1,490
Other acquisitions		24
Impact of changes in exchange rates	9	16
Goodwill, Ending Balance	10,126	10,114
Operating Segments | Production
Goodwill [Line Items]
Goodwill, Beginning Balance	4,639	3,223
Acquisitions	46	1,170
Other acquisitions		242
Impact of changes in exchange rates	12	4
Goodwill, Ending Balance	$ 4,697	$ 4,639

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 12,567	$ 12,562
Accumulated Amortization	3,213	2,707
Net Book Value	9,354	9,855
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	4,832	4,938
Accumulated Amortization	1,020	865
Net Book Value	3,812	4,073
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	3,634	3,655
Accumulated Amortization	1,078	835
Net Book Value	2,556	2,820
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	2,806	2,847
Accumulated Amortization	533	458
Net Book Value	2,273	2,389
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,295	1,122
Accumulated Amortization	582	549
Net Book Value	$ 713	$ 573

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Estimated amortization charged to income, 2018	$ 677
Estimated amortization charged to income, 2019	673
Estimated amortization charged to income, 2020	638
Estimated amortization charged to income, 2021	616
Estimated amortization charged to income, 2022	608
Amortization expense	$ 663	$ 567	$ 354
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 Facil63

Long-term Debt and Debt Facility Agreements - Long-term Debt (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt, carrying amount		$ 14,875	$ 16,463
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,694	2,421
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,741	1,740
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,595	1,594
3.00% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,593	1,591
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,492	1,491
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount		1,100	1,100
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount		996	996
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount		846	845
0.63% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Long-term debt, carrying amount		712	622
1.50% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Long-term debt, carrying amount	[1]	603	536
2.65% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount		598
2.20% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt, carrying amount		498
7.00% Notes due 2038
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	212	214
4.50% Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	135	137
5.95% Notes due 2041
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	115	116
3.60% Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	110	110
5.13% Notes due 2043
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	99	99
4.00% Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	82	83
3.70% Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]	56	56
2.35% Senior Notes due 2018
Debt Instrument [Line Items]
Long-term debt, carrying amount			1,297
6.38% Notes due 2018
Debt Instrument [Line Items]
Long-term debt, carrying amount	[2]		297
Other
Debt Instrument [Line Items]
Long-term debt, carrying amount		$ 598	$ 1,118
[1]	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 2013.
[2]	Represents long-term fixed rate debt obligations assumed in connection with the acquisition of Cameron, net of amounts repurchased subsequent to the closing of the transaction.

Long-term Debt and Debt Facil64

Long-term Debt and Debt Facility Agreements - Long-term Debt (Parenthetical) (Detail) € in Billions, $ in Billions	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016	Dec. 31, 2013EUR (€)	Dec. 31, 2017EUR (€)	Jun. 30, 2017
Debt Instrument [Line Items]
Debt instrument interest rate					6.50%
Long-term debt, carrying amount | $	$ 1.1
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%	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%		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%		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%		3.65%
Debt instrument maturity date	2,023	2,023
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate	4.20%	4.20%		4.20%
Debt instrument maturity date	2,021	2,021
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	2.40%	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%		3.63%
Debt instrument maturity date	2,022	2,022
0.63% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate	0.63%	0.63%		0.63%
Debt instrument maturity date	2,019	2,019
1.50% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate	1.50%	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
2.65% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	2.65%			2.65%
Debt instrument maturity date	2,022
Guaranteed notes face amount | $	$ 0.6
2.20% Senior Notes due 2020
Debt Instrument [Line Items]
Debt instrument interest rate	2.20%			2.20%
Debt instrument maturity date	2,020
Guaranteed notes face amount | $	$ 0.5
7.00% Notes due 2038
Debt Instrument [Line Items]
Debt instrument interest rate	7.00%	7.00%		7.00%
Debt instrument maturity date	2,038	2,038
4.50% Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate	4.50%	4.50%		4.50%
Debt instrument maturity date	2,021	2,021
5.95% Notes due 2041
Debt Instrument [Line Items]
Debt instrument interest rate	5.95%	5.95%		5.95%
Debt instrument maturity date	2,041	2,041
3.60% Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	3.60%	3.60%		3.60%
Debt instrument maturity date	2,022	2,022
5.13% Notes due 2043
Debt Instrument [Line Items]
Debt instrument interest rate	5.13%	5.13%		5.13%
Debt instrument maturity date	2,043	2,043
4.00% Notes due 2023
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%	4.00%		4.00%
Debt instrument maturity date	2,023	2,023
3.70% Notes due 2024
Debt Instrument [Line Items]
Debt instrument interest rate	3.70%	3.70%		3.70%
Debt instrument maturity date	2,024	2,024
2.35% Senior Notes due 2018
Debt Instrument [Line Items]
Debt instrument interest rate		2.35%
Debt instrument maturity date		2,018
6.38% Notes due 2018
Debt Instrument [Line Items]
Debt instrument interest rate		6.38%
Debt instrument maturity date		2,018
Euro Medium Term Note Program
Debt Instrument [Line Items]
Guaranteed notes face amount | €				€ 5

Long-term Debt and Debt Facil65

Long-term Debt and Debt Facility Agreements - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Investment in subsidiary-Schlumberger Investment SA	100.00%
Committed credit facility agreement aggregated	$ 6,600
Unused credit facility	3,600
Short-term borrowings and current portion of long-term debt	3,324	$ 3,153
Long-term debt, carrying amount	$ 14,875	16,463
Weighted average interest rate on variable rate debt	2.30%
Long-term Debt maturity in 2019	$ 1,500
Long-term Debt maturity in 2020	2,800
Long-term Debt maturity in 2021	4,300
Long-term Debt maturity in 2022	2,600
Long-term Debt maturity in 2023	1,600
Long-term Debt maturity in 2025	1,700
Long-term Debt maturity thereafter	400
Long-term debt, fair value	15,200	16,800
Commercial paper borrowings
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	6,300
Short-term borrowings and current portion of long-term debt	1,300	200
Long-term debt, carrying amount	1,694	2,421
Long-term debt	3,000	$ 2,600
Long-term debt, fair value	135
Commercial paper programs mature in February 2018
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	1,000
Commercial paper programs mature in July 2018
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	1,800
Commercial paper programs mature in November 2020
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	1,500
Commercial paper programs mature in February 2021
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	$ 2,000

Derivative Instruments and He66

Derivative Instruments and Hedging Activities - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Dec. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2017USD ($)Country	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Jun. 30, 2017	Dec. 31, 2013EUR (€)
Derivative [Line Items]
Denominated debt issued			$ 1,100,000,000
Promissory note interest rate						6.50%
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps			13,600,000,000
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps			4,600,000,000
Short-term investments			$ 3,300,000,000
Number of countries in which Schlumberger conducts business | Country			85
Percentage of revenue denominated in domestic currency			78.00%
Recognized a cumulative net gain in Accumulated other comprehensive loss relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges			$ 3,000,000
Transaction losses of hedging activities			57,000,000	$ 93,000,000	$ 76,000,000
Restructuring and other charges			3,764,000,000	3,820,000,000	2,575,000,000
Fair value of outstanding derivatives	$ 0		$ 0	0
Currency Devaluation Losses In Egypt
Derivative [Line Items]
Restructuring and other charges	$ 63,000,000			$ 63,000,000
Currency Devaluation Losses In Venezuela
Derivative [Line Items]
Restructuring and other charges		$ 49,000,000			$ 49,000,000
1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Notes, face amount | €							€ 500,000,000
Denominated debt issued | €							€ 500,000,000
Promissory note interest rate	1.50%		1.50%	1.50%			1.50%
2.20% Senior Notes due 2020
Derivative [Line Items]
Notes, face amount			$ 500,000,000
Derivative swap interest rate			2.20%
Promissory note interest rate			2.20%
2.65% Senior Notes due 2022
Derivative [Line Items]
Notes, face amount			$ 600,000,000
Derivative swap interest rate			2.65%
Promissory note interest rate			2.65%
Cross currency swap
Derivative [Line Items]
Notional amount of interest rate swap			$ 1,100,000,000				€ 500,000,000
Cross currency swap | 2.20% Senior Notes due 2020
Derivative [Line Items]
Promissory note interest rate			1.97%
Cross currency swap | 2.65% Senior Notes due 2022
Derivative [Line Items]
Promissory note interest rate			2.52%
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			$ 5,000,000,000
Foreign exchange contracts | Debt | Derivatives designated as hedges
Derivative [Line Items]
Notional amount of interest rate swap			$ 1,800,000,000
London Interbank Offered Rate (LIBOR) | Floating Rate Debt | 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Basis point			0.64%

Derivative Instruments and He67

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments Designated as Fair Value Hedges and Not Designated as Hedges on Consolidated Statement of Income (Loss) (Detail) - Cash Flow Hedging - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivatives designated as hedges | Cross currency swap | Interest
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ 73	$ (31)	$ (64)
Not Designated as Hedging Instrument
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	(34)	(246)	(154)
Not Designated as Hedging Instrument | Cross currency swap | Interest
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	(8)
Not Designated as Hedging Instrument | Foreign exchange contracts | Cost of services/sales
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ (26)	$ (246)	$ (154)

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Common stock, shares authorized	4,500,000,000
Common stock, par value	$ 0.01
Common stock, shares outstanding	1,383,932,776	1,391,475,510
Preferred stock, shares authorized	200,000,000
Preferred stock, par value	$ 0.01
Preferred stock, issued	0
Other comprehensive income (loss)	$ 369	$ (85)	$ (352,000)

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 41,529	$ 35,905	$ 38,049
Other comprehensive income (loss) before reclassifications	145	(452)	(960)
Amounts reclassified from accumulated other comprehensive loss	239	380	682
Income taxes	(15)	(13)	(74)
Balance	37,261	41,529	35,905
Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,136)	(2,053)	(1,531)
Other comprehensive income (loss) before reclassifications	(3)	(83)	(522)
Balance	(2,139)	(2,136)	(2,053)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	21		10
Other comprehensive income (loss) before reclassifications	(8)	21	(50)
Amounts reclassified from accumulated other comprehensive loss			40
Balance	13	21
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(19)	(39)	(96)
Other comprehensive income (loss) before reclassifications	22	(101)	(178)
Amounts reclassified from accumulated other comprehensive loss		121	235
Balance	3	(19)	(39)
Pension and Other Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,509)	(2,466)	(2,589)
Other comprehensive income (loss) before reclassifications	134	(289)	(210)
Amounts reclassified from accumulated other comprehensive loss	239	259	407
Income taxes	(15)	(13)	(74)
Balance	(2,151)	(2,509)	(2,466)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(4,643)	(4,558)	(4,206)
Balance	$ (4,274)	$ (4,643)	$ (4,558)

Stock-based Compensation Plan70

Stock-based Compensation Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate intrinsic value of stock options outstanding	$ 64
Aggregate intrinsic value of stock options exercisable	56
Total intrinsic value of options exercised	26	$ 45	$ 62
Total unrecognized compensation cost related to nonvested stock-based compensation arrangements	485
Expected to be recognized in 2018	246
Expected to be recognized in 2019	158
Expected to be recognized in 2020	58
Expected to be recognized in 2021	22
Expected to be recognized in 2022	$ 1
Future Grants Shares	45,000,000
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 3 months 19 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	1,100,000
Performance Shares | Achievement Exceeds Predefined Target | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares to be awarded as a percentage of total target award	250.00%
Performance Shares | Achievement Falls Below Threshold
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares to be awarded	0
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares to be awarded	2,495,000	1,678,000	1,254,000
Performance shares outstanding	5,428,000	5,112,000	3,571,000	4,138,000
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 Plan71

Stock-based Compensation Plans - Weighted-Average Assumptions (Detail) - Employee Stock Option - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	2.30%	2.70%	2.30%
Expected volatility	27.00%	30.00%	36.00%
Risk-free interest rate	2.40%	1.70%	1.70%
Expected option life in years	7 years	7 years	7 years
Weighted-average fair value per share	$ 20.85	$ 17.45	$ 25.96

Stock-based Compensation Plan72

Stock-based Compensation Plans - Options Outstanding and Option Exercisable (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2017$ / sharesshares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Options Outstanding | shares	47,210
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	5 years 7 months 6 days
Options Outstanding, Weighted- Average Exercise Price	$ 79.13
Options Exercisable | shares	30,319
Options Exercisable, Weighted-Average Exercise Price	$ 76.71
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	5,696
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	4 years 9 months 18 days
Options Outstanding, Weighted- Average Exercise Price	$ 56.17
Options Exercisable | shares	4,132
Options Exercisable, Weighted-Average Exercise Price	$ 53.91
Exercise prices range $68.51 - $71.06
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	68.51
Exercise prices maximum range	$ 71.06
Options Outstanding | shares	6,665
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	4 years
Options Outstanding, Weighted- Average Exercise Price	$ 69.93
Options Exercisable | shares	6,008
Options Exercisable, Weighted-Average Exercise Price	$ 69.82
Exercise prices range $72.11 - $79.85
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	72.11
Exercise prices maximum range	$ 79.85
Options Outstanding | shares	9,107
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	5 years 6 months
Options Outstanding, Weighted- Average Exercise Price	$ 73.97
Options Exercisable | shares	7,033
Options Exercisable, Weighted-Average Exercise Price	$ 73.08
Exercise prices range $80.53 - $87.38
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	80.53
Exercise prices maximum range	$ 87.38
Options Outstanding | shares	15,511
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	6 years 1 month 6 days
Options Outstanding, Weighted- Average Exercise Price	$ 84.01
Options Exercisable | shares	7,186
Options Exercisable, Weighted-Average Exercise Price	$ 83.68
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	10,231
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	6 years 2 months 12 days
Options Outstanding, Weighted- Average Exercise Price	$ 95.07
Options Exercisable | shares	5,960
Options Exercisable, Weighted-Average Exercise Price	$ 95.32

Stock-based Compensation Plan73

Stock-based Compensation Plans - Summary of Stock Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Outstanding at beginning of year, Shares	46,502	41,087	38,583
Granted, Shares	5,024	7,672	7,118
Exercised, Shares	(1,156)	(3,357)	(2,561)
Forfeited, Shares	(3,160)	(1,988)	(2,053)
Outstanding at year-end, Shares	47,210	46,502	41,087
Outstanding at beginning of year, Weighted-Average Exercise Price	$ 78.31	$ 78.73	$ 76.10
Granted, Weighted-Average Exercise Price	86.55	76.14	86.86
Exercised, Weighted-Average Exercise Price	57.87	60.70	60.10
Forfeited, Weighted-Average Exercise Price	86.99	84.60	80.34
Outstanding at year-end, Weighted-Average Exercise Price	$ 79.13	$ 78.31	$ 78.73
Cameron
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Assumed in transaction, Shares		3,088
Assumed in transaction, Weighted-Average Exercise Price		$ 63.24

Stock-based Compensation Plan74

Stock-based Compensation Plans - Restricted Stock Transactions (Detail) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested at beginning of year, Restricted Stock	5,112	3,571	4,138
Granted, Restricted Stock	2,495	1,678	1,254
Vested, Restricted Stock	(1,645)	(1,720)	(1,495)
Forfeited, Restricted Stock	(534)	(241)	(326)
Unvested at year-end, Restricted Stock	5,428	5,112	3,571
Unvested at beginning of year, Weighted-Average Grant Date Fair Value	$ 78.31	$ 85.04	$ 80.80
Granted, Weighted-Average Grant Date Fair Value	73.09	68.66	82.37
Vested, Weighted-Average Grant Date Fair Value	83.03	72.64	71.30
Forfeited, Weighted-Average Grant Date Fair Value	80.17	80.87	83.86
Unvested at year-end, Weighted-Average Grant Date Fair Value	$ 72.33	$ 78.31	$ 85.04
Cameron
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Assumed in transaction, Restricted Stock		1,824
Assumed in transaction, Weighted-Average Grant Date Fair Value		$ 72.12

Stock-based Compensation Plan75

Stock-based Compensation Plans - Discounted Stock Purchase Plan Assumptions and Resulting Weighted Average Fair Value (Detail) - DSPP - $ / shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	2.70%	2.70%	2.30%
Expected volatility	19.00%	25.00%	27.00%
Risk-free interest rate	1.00%	0.50%	0.20%
Weighted-average fair value per share	$ 9.46	$ 10.37	$ 12.45

Stock-based Compensation Plan76

Stock-based Compensation Plans - Stock-Based Compensation Expense Recognized in Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 343	$ 267	$ 326
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	161	175	176
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	148	47	107
DSPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 34	$ 45	$ 43

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2017USD ($)Jurisdictions	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
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	$ 3,764	$ 3,820	$ 2,575
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	119	97
Charge relating to one-time mandatory tax on previously deferred foreign earnings	410
Accrued interest and penalties	195	178	176
Domestic Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	533	1,848	883
Foreign Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	$ 3,231	$ 1,972	$ 1,692
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 (Loss) Be

Income Taxes - Income (Loss) Before Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income before taxes, United States	$ (841)	$ (3,103)	$ (691)
Income before taxes, Outside United States	(342)	1,198	3,572
Income (loss) before taxes	$ (1,183)	$ (1,905)	$ 2,881

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Postretirement benefits	$ 135	$ 253
Intangible assets	(2,186)	(2,869)
Investments in non-US subsidiaries	(224)	(271)
Fixed assets, net	(55)	(79)
Inventories	126	248
Other, net	554	838
Net deferred tax assets (liabilities)	$ (1,650)	$ (1,880)

Income Taxes - Components of Ta

Income Taxes - Components of Tax Expense (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current:
United States-Federal	$ (170)	$ (511)	$ 90
United States-State	57	(36)	12
Outside United States	703	648	1,085
Current Income Tax Expense (Benefit), Total	590	101	1,187
Deferred:
United States-Federal	(225)	(352)	(356)
United States-State	4	(13)	(19)
Outside United States	(47)	(51)	(52)
Valuation allowance	8	37	(14)
Deferred income taxes	(260)	(379)	(441)
Consolidated taxes on (loss) income	$ 330	$ (278)	$ 746

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of US Statutory Federal Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
US federal statutory rate	35.00%	35.00%	35.00%
State tax		2.00%
Non-US income taxed at different rates	(24.00%)	(21.00%)	(13.00%)
Enactment of US tax reform	(6.00%)
Other	7.00%		(2.00%)
Effective income tax rate	(28.00%)	15.00%	26.00%
Charges And Credits
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
Charges and credits (See Note 3)	(40.00%)	(1.00%)	6.00%

Income Taxes - Reconciliation82

Income Taxes - Reconciliation of Liabilities Associated with Uncertain Tax Provisions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 1,419	$ 1,285	$ 1,402
Additions based on tax positions related to the current year	132	70	140
Additions for tax positions of prior years	58	119	136
Additions related to acquisitions		127	5
Impact of changes in exchange rates	23	(25)	(78)
Settlements with tax authorities	(41)	(45)	(99)
Reductions for tax positions of prior years	(157)	(85)	(203)
Reductions due to the lapse of the applicable statute of limitations	(41)	(27)	(18)
Balance at end of year	$ 1,393	$ 1,419	$ 1,285

Income Taxes - Tax Years Subjec

Income Taxes - Tax Years Subject to Examination by Tax Authorities (Detail)	12 Months Ended
	Dec. 31, 2017
Brazil | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,012
Brazil | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
Canada | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,010
Canada | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
Ecuador | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,014
Ecuador | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
Mexico | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,011
Mexico | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
Norway | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,013
Norway | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
Russia | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,014
Russia | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
Saudi Arabia | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,004
Saudi Arabia | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
United Kingdom | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,015
United Kingdom | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017
United States | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,014
United States | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2,017

Leases and Lease Commitments -

Leases and Lease Commitments - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Leases [Abstract]
Total rental expense	$ 1.1	$ 1.2	$ 1.6

Leases and Lease Commitments 85

Leases and Lease Commitments - Future Minimum Rental Commitments Under Noncancelable Operating Leases (Detail) $ in Millions	Dec. 31, 2017USD ($)
Leases [Abstract]
2,018	$ 284
2,019	244
2,020	203
2,021	164
2,022	127
Thereafter	410
Total	$ 1,432

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue		$ 30,440	$ 27,810	$ 35,475
Income Before Taxes		(1,183)	(1,905)	2,881
Assets		71,987	77,956	68,005
Depreciation and Amortization	[1]	3,837	4,094	4,078
Capital Expenditures		2,107	2,055	2,410
Pretax operating income		3,921	3,273	6,510
Interest expense		566	570	346
Charges & credits		3,764	3,820	2,575
Operating Segments
Segment Reporting Information [Line Items]
Revenue		30,440	27,810	35,475
Interest income		21	26	22
Interest expense		53	53	30
Operating Segments | Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue		6,786	6,648	9,501
Income Before Taxes		1,251	1,249	2,450
Assets		4,892	6,890	8,266
Depreciation and Amortization		988	1,104	1,279
Capital Expenditures		305	532	648
Operating Segments | Drilling
Segment Reporting Information [Line Items]
Revenue		8,392	8,561	13,563
Income Before Taxes		1,151	994	2,538
Assets		5,421	6,747	8,562
Depreciation and Amortization		685	904	1,177
Capital Expenditures		629	425	673
Operating Segments | Production
Segment Reporting Information [Line Items]
Revenue		10,639	8,804	12,548
Income Before Taxes		928	507	1,585
Assets		12,326	10,476	9,938
Depreciation and Amortization		1,249	1,234	1,216
Capital Expenditures		889	655	824
Operating Segments | Cameron
Segment Reporting Information [Line Items]
Revenue		5,205	4,211
Income Before Taxes		733	653
Assets		3,978	4,246
Depreciation and Amortization		264	211
Capital Expenditures		150	176
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(582)	(414)	(137)
Income Before Taxes		(142)	(130)	(63)
Assets		1,881	1,605	2,039
Depreciation and Amortization		213	257	213
Capital Expenditures		134	267	265
Goodwill and intangible assets		34,472	34,845	20,174
Cash and short term investments		5,089
Cash, short term investments and fixed income investments			9,495	13,452
All other assets		3,928	3,652	5,574
Corporate & other	[2]	(934)	(925)	(768)
Interest income	[3]	107	84	30
Interest expense	[4]	(513)	(517)	(316)
Charges & credits	[5]	(3,764)	(3,820)	(2,575)
Eliminations & other | Corporate and Other
Segment Reporting Information [Line Items]
Depreciation and Amortization	[2]	$ 438	$ 384	$ 193
[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 (including intangible asset amortization expense resulting from the 2016 acquisition of Cameron), certain centrally managed initiatives and other nonoperating items.
[3]	Interest income excludes amounts which are included in the segments’ income (2017: $21 million; 2016: $26 million; 2015: $22 million).
[4]	Interest expense excludes amounts which are included in the segments’ income (2017: $53 million; 2016: $53 million; 2015: $30 million).
[5]	See Note 3 – Charges and Credits.

Segment Information - Schedul87

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Interest expense	$ 566	$ 570	$ 346
Operating Segments
Segment Reporting Information [Line Items]
Interest income	21	26	22
Interest expense	$ 53	$ 53	$ 30

Segment Information - Revenue b

Segment Information - Revenue by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue	$ 30,440	$ 27,810	$ 35,475
Operating Segments
Segment Reporting Information [Line Items]
Revenue	30,440	27,810	35,475
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	9,487	6,665	9,811
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Revenue	3,976	4,230	6,014
Operating Segments | Europe/CIS/Africa
Segment Reporting Information [Line Items]
Revenue	7,047	7,351	9,284
Operating Segments | Middle East & Asia
Segment Reporting Information [Line Items]
Revenue	9,419	9,286	9,898
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	$ 511	$ 278	$ 468

Segment Information - Additiona

Segment Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue	$ 30,440	$ 27,810	$ 35,475
United States
Segment Reporting Information [Line Items]
Revenue	$ 8,100	$ 5,400	$ 8,500

Segment Information - Fixed Ass

Segment Information - Fixed Assets Less Accumulated Depreciation by Geographic Area (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Fixed Assets less accumulated depreciation		$ 11,576	$ 12,821	$ 13,415
Operating Segments | North America
Segment Reporting Information [Line Items]
Fixed Assets		5,120	4,428	4,392
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Fixed Assets		1,042	1,460	1,728
Operating Segments | Europe
Segment Reporting Information [Line Items]
Fixed Assets		2,540	2,706	2,978
Operating Segments | Middle East & Asia
Segment Reporting Information [Line Items]
Fixed Assets		2,771	3,149	3,078
Unallocated
Segment Reporting Information [Line Items]
Fixed Assets	[1]	$ 103	$ 1,078	$ 1,239
[1]	Represents seismic vessels, including the related on-board equipment, which frequently transition between geographic areas.

Pension and Other Benefit Pla91

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.70%	4.20%
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.20%	4.50%	4.15%
Compensation increases	4.00%	4.00%	4.00%
Return on plan assets	7.25%	7.25%	7.25%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.13%	4.36%	4.07%
Compensation increases	4.81%	4.81%	4.79%
Return on plan assets	7.40%	7.40%	7.40%

Pension and Other Benefit Pla92

Pension and Other Benefit Plans - Net Pension Cost (Credit) for Schlumberger Pension Plans and US Postretirement Medical Plan (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	$ 29	$ 30	$ 42
Interest cost on projected benefit obligation	46	47	48
Expected return on plan assets	(60)	(57)	(52)
Amortization of prior service cost	(29)	(32)	(32)
Amortization of net loss			13
Total pension cost	(14)	(12)	19
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	57	62	86
Interest cost on projected benefit obligation	175	177	170
Expected return on plan assets	(242)	(235)	(229)
Amortization of prior service cost	12	12	12
Amortization of net loss	39	79	123
Total pension cost	41	95	162
International
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	95	110	167
Interest cost on projected benefit obligation	306	311	297
Expected return on plan assets	(541)	(517)	(498)
Amortization of prior service cost	97	122	121
Amortization of net loss	120	78	170
Total pension cost	$ 77	$ 104	$ 257

Pension and Other Benefit Pla93

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, 2017	Dec. 31, 2016
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.70%	4.20%
Compensation increases	4.00%	4.00%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.55%	4.13%
Compensation increases	4.81%	4.81%

Pension and Other Benefit Pla94

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Amounts Recognized in Balance Sheet
Postretirement Benefits	$ (1,082)	$ (1,495)
US Plan Assets
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	4,240	4,025
Service cost	57	62	$ 86
Interest cost	175	177	170
Actuarial (gains) losses	325	137
Benefits paid	(194)	(183)
Other		22
Projected benefit obligation at end of year	4,603	4,240	4,025
Change in Plan Assets
Plan assets at fair value at beginning of year	3,625	3,467
Actual return on plan assets	622	320
Company contributions	5	4
Benefits paid	(194)	(183)
Other		17
Plan assets at fair value at end of year	4,058	3,625	3,467
Unfunded Liability	(545)	(615)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(545)	(615)
Total of post retirement benefits	(545)	(615)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial losses	887	982
Prior service cost	30	42
Total amount recognized in accumulated other comprehensive income	917	1,024
Accumulated benefit obligation	4,347	3,999
International
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	7,793	7,340
Service cost	95	110	167
Interest cost	306	311	297
Contribution by plan participants	88	117
Actuarial (gains) losses	616	477
Currency effect	147	(290)
Benefits paid	(293)	(272)
Projected benefit obligation at end of year	8,752	7,793	7,340
Change in Plan Assets
Plan assets at fair value at beginning of year	7,194	6,832
Actual return on plan assets	1,216	715
Currency effect	161	(318)
Company contributions	88	130
Contributions by plan participants	88	117
Benefits paid	(293)	(272)
Other	53	(10)
Plan assets at fair value at end of year	8,507	7,194	$ 6,832
Unfunded Liability	(245)	(599)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(418)	(724)
Other Assets	173	125
Total of post retirement benefits	(245)	(599)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial losses	1,419	1,644
Prior service cost	17	114
Total amount recognized in accumulated other comprehensive income	1,436	1,758
Accumulated benefit obligation	$ 8,400	$ 7,454

Pension and Other Benefit Pla95

Pension and Other Benefit Plans - Weighted-Average Allocation of Plan Assets and Target Allocation by Asset Category (Detail)	Dec. 31, 2017	Dec. 31, 2016
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	100.00%	100.00%
Target allocation of assets	100.00%	100.00%
International
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	100.00%	100.00%
Target allocation of assets	100.00%	100.00%
Equity securities | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	51.00%	52.00%
Equity securities | US Plan Assets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	56.00%
Equity securities | US Plan Assets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	37.00%
Equity securities | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	64.00%	64.00%
Equity securities | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	71.00%
Equity securities | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	45.00%
Debt securities | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	38.00%	37.00%
Debt securities | US Plan Assets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	62.00%
Debt securities | US Plan Assets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	35.00%
Debt securities | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	23.00%	25.00%
Debt securities | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	35.00%
Debt securities | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	20.00%
Cash and cash equivalents | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	3.00%	2.00%
Cash and cash equivalents | US Plan Assets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	3.00%
Cash and cash equivalents | US Plan Assets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	0.00%
Cash and cash equivalents | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	4.00%	2.00%
Cash and cash equivalents | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	5.00%
Cash and cash equivalents | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	0.00%
Alternative investments | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	8.00%	9.00%
Alternative investments | US Plan Assets | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	10.00%
Alternative investments | US Plan Assets | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	0.00%
Alternative investments | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	9.00%	9.00%
Alternative investments | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	25.00%
Alternative investments | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	0.00%

Pension and Other Benefit Pla96

Pension and Other Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Frequency of asset performance monitored, years	5 years
Expected contributions to postretirement benefit plans	$ 125
Expenses for deferred benefit programs	$ 413	$ 445	$ 565
US Employees Postretirement Benefits Other Than Pensions
Defined Benefit Plan Disclosure [Line Items]
Retirement coverage plan, description	Effective April 1, 2015, Schlumberger changed 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 subsidizes 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 by more than 5% in any given year.
US Employees Postretirement Benefits Other Than Pensions | Maximum
Defined Benefit Plan Disclosure [Line Items]
Compensation increases	5.00%
Postretirement medical plan | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Investment of assets in government and government-related debt securities under US postretirement medical plan	41.00%
Postretirement medical plan | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Investment of assets in government and government-related debt securities under US postretirement medical plan	59.00%

Pension and Other Benefit Pla97

Pension and Other Benefit Plans - Fair Value of Schlumberger's Pension Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	$ 4,058	$ 3,625	$ 3,467
US Plan Assets | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	112	60
US Plan Assets | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	757	662
US Plan Assets | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	771	625
US Plan Assets | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	656	643
US Plan Assets | Collateralized mortgage obligations and mortgage backed securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	108	92
US Plan Assets | Private equity
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	183	191
US Plan Assets | Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	147	142
US Plan Assets | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	1,324	1,210
International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	8,507	7,194	$ 6,832
International | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	307	184
International | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	2,160	1,726
International | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	841	685
International | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	985	1,001
International | Collateralized mortgage obligations and mortgage backed securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	150	130
International | Private equity
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	477	385
International | Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	168	106
International | Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	133	123
International | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	3,286	2,854
Level One | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	2,150	1,877
Level One | US Plan Assets | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	92	15
Level One | US Plan Assets | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	747	649
Level One | US Plan Assets | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	163	164
Level One | US Plan Assets | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	1,148	1,049
Level One | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	4,593	3,944
Level One | International | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	69	135
Level One | International | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	1,871	1,475
Level One | International | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	11	10
Level One | International | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	2,642	2,324
Level Two | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	1,578	1,415
Level Two | US Plan Assets | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	20	45
Level Two | US Plan Assets | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	10	13
Level Two | US Plan Assets | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	771	625
Level Two | US Plan Assets | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	493	479
Level Two | US Plan Assets | Collateralized mortgage obligations and mortgage backed securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	108	92
Level Two | US Plan Assets | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	176	161
Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	3,136	2,636
Level Two | International | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	238	49
Level Two | International | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	289	251
Level Two | International | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	841	685
Level Two | International | Government and government-related debt securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	974	991
Level Two | International | Collateralized mortgage obligations and mortgage backed securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	150	130
Level Two | International | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	644	530
Level Three | US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	330	333
Level Three | US Plan Assets | Private equity
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	183	191
Level Three | US Plan Assets | Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	147	142
Level Three | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	778	614
Level Three | International | Private equity
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	477	385
Level Three | International | Real estate
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	168	106
Level Three | International | Other
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	$ 133	$ 123

Pension and Other Benefit Pla98

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.70%	4.20%
Current medical cost trend rate	7.25%	7.25%
Ultimate medical cost trend rate	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2,026	2,026
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.20%	4.50%	4.15%
Return on plan assets	7.00%	7.00%	7.00%
Current medical cost trend rate	7.25%	7.50%	7.00%
Ultimate medical cost trend rate	5.00%	5.00%	5.00%
Year that the rate reaches the ultimate trend rate	2,026	2,026	2,023

Pension and Other Benefit Pla99

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, 2017	Dec. 31, 2016	Dec. 31, 2015
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	$ 1,108	$ 1,103
Service cost	29	30	$ 42
Interest cost	46	47	48
Contribution by plan participants	8	8
Actuarial gains	71	(32)
Benefits paid	(49)	(48)
Projected benefit obligation at end of year	1,213	1,108	1,103
Change in Plan Assets
Plan assets at fair value at beginning of year	952	884
Actual return on plan assets	143	68
Company contributions	40	40
Contributions by plan participants	8	8
Benefits paid	(49)	(48)
Plan assets at fair value at end of year	1,094	952	$ 884
Unfunded Liability	(119)	(156)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial losses	36	62
Prior service credit	(215)	(243)
Total amount recognized in accumulated other comprehensive income	$ (179)	$ (181)

Pension and Other Benefit Pl100

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, 2017USD ($)
Defined Benefit Plan Disclosure [Line Items]
Effect on total service and interest cost components, One Percentage Point Decrease	$ (3)
Effect on accumulated postretirement benefit obligation, One Percentage Point Decrease	(30)
United States
Defined Benefit Plan Disclosure [Line Items]
Effect on total service and interest cost components, One Percentage Point Increase	3
Effect on accumulated postretirement benefit obligation, One Percentage Point Increase	$ 35

Pension and Other Benefit Pl101

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, 2017USD ($)
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
2,018	$ 53
2,019	55
2,020	58
2,021	60
2,022	61
2023-2027	333
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
2,018	201
2,019	207
2,020	212
2,021	218
2,022	224
2023-2027	1,215
International
Defined Benefit Plan Disclosure [Line Items]
2,018	281
2,019	294
2,020	307
2,021	320
2,022	333
2023-2027	$ 1,895

Pension and Other Benefit Pl102

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	Dec. 31, 2017USD ($)
Postretirement medical plan
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Prior service cost (credit)	$ (28)
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Net actuarial losses	209
Prior service cost (credit)	$ 23

Supplementary Information - Add

Supplementary Information - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Fixed assets receivable in lieu of accounts receivable			$ 200
Revenue in excess of billings	$ 300	$ 500

Supplementary Information - Cas

Supplementary Information - Cash Paid (Refunded) for Interest and Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Interest	$ 572	$ 599	$ 346
Income tax	$ (44)	$ 750	$ 1,567

Supplementary Information - Int

Supplementary Information - Interest and Other Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Interest income	$ 128	$ 110	$ 52
Earnings of equity method investments	96	90	184
Interest and other income, net	$ 224	$ 200	$ 236

Supplementary Information - Cha

Supplementary Information - Change in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Balance at beginning of year	$ 397	$ 333	$ 275
Additions	7	123	75
Amounts written off	(163)	(59)	(17)
Balance at end of year	$ 241	$ 397	$ 333

Supplementary Information - Acc

Supplementary Information - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Payroll, vacation and employee benefits	$ 1,296	$ 1,349
Trade	4,614	4,004
Deferred revenue	752	1,088
Other	3,374	3,575
Accounts payable and accrued liabilities	$ 10,036	$ 10,016