Schlumberger Limited (SLB) 10-K 27 Jan 21 2020 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Registrant Name	SCHLUMBERGER LIMITED/NV
Entity Central Index Key	0000087347
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	1,392,325,960
Entity Public Float		$ 25,500
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SLB
Security Exchange Name	NYSE
Entity File Number	1-4601
Entity Incorporation, State or Country Code	P8
Entity Tax Identification Number	52-0684746
Entity Address, Address Line One	5599 San Felipe
Entity Address, Address Line Two	17th Floor
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Country	US
Entity Address, Postal Zip Code	77056
City Area Code	713
Local Phone Number	513-2000
Document Annual Report	true
Document Transition Report	false
Documents Incorporated by Reference	Certain information required to be furnished pursuant to Part III of this Form 10-K is set forth in, and is incorporated by reference from, Schlumberger’s definitive proxy statement for its 2021 Annual General Meeting of Stockholders, to be filed by Schlumberger with the Securities and Exchange Commission (“SEC”) pursuant to Regulation 14A within 120 days after December 31, 2020 (the “2021 Proxy Statement”).

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue
Total Revenue	$ 23,601	$ 32,917	$ 32,815
Interest & other income	163	86	149
Gains on sales of businesses	104	247	215
Expenses
Research & engineering	580	717	702
General & administrative	365	474	444
Impairments & other	12,658	13,148	356
Interest	563	609	575
Income (loss) before taxes	(11,298)	(10,418)	2,624
Tax expense (benefit)	(812)	(311)	447
Net income (loss)	(10,486)	(10,107)	2,177
Net income attributable to noncontrolling interests	32	30	39
Net income (loss) attributable to Schlumberger	$ (10,518)	$ (10,137)	$ 2,138
Basic earnings (loss) per share of Schlumberger	$ (7.57)	$ (7.32)	$ 1.54
Diluted earnings (loss) per share of Schlumberger	$ (7.57)	$ (7.32)	$ 1.53
Average shares outstanding:
Basic	1,390	1,385	1,385
Assuming dilution	1,390	1,385	1,393
Services
Revenue
Total Revenue	$ 16,533	$ 24,358	$ 24,296
Expenses
Cost of services and sales	14,675	20,828	20,618
Product
Revenue
Total Revenue	7,068	8,559	8,519
Expenses
Cost of services and sales	$ 6,325	$ 7,892	$ 7,860

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (10,486)	$ (10,107)	$ 2,177
Currency translation adjustments
Net change arising during the period	(239)	67	(191)
Marketable securities
Unrealized loss arising during the period			(11)
Cash flow hedges
Net loss on cash flow hedges	(90)	(32)	(16)
Reclassification to net income (loss) of net realized loss	54	10	1
Pension and other postretirement benefit plans
Actuarial gain (loss) arising during the period	(247)	127	(186)
Amortization to net income (loss) of net actuarial loss	200	94	187
Amortization to net income (loss) of net prior service (credit) cost	(17)	(11)	(5)
Impact of curtailment	(69)
Income taxes on pension and other postretirement benefit plans	(38)	(71)	(18)
Comprehensive income (loss)	(10,932)	(9,923)	1,938
Comprehensive income attributable to noncontrolling interests	32	30	39
Comprehensive income (loss) attributable to Schlumberger	$ (10,964)	$ (9,953)	$ 1,899

CONSOLIDATED BALANCE SHEET

CONSOLIDATED BALANCE SHEET $ in Millions, € in Billions	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)
Current Assets
Cash	$ 844	$ 1,137
Short-term investments	2,162	1,030
Receivables less allowance for doubtful accounts (2020 - $301; 2019 - $255)	5,247	7,747
Inventories	3,354	4,130
Other current assets	1,312	1,486
Current assets total	12,919	15,530
Investments in Affiliated Companies	2,061	1,565
Fixed Assets less accumulated depreciation	6,826	9,270
Multiclient Seismic Data	317	568
Goodwill	12,980	16,042
Intangible Assets	3,455	7,089
Other Assets	3,876	6,248
Total Assets	42,434	56,312
Current Liabilities
Accounts payable and accrued liabilities	8,442	10,663
Estimated liability for taxes on income	1,015	1,209
Short-term borrowings and current portion of long-term debt	850	524
Dividends payable	184	702
Current Liabilities Total	10,491	13,098
Long-term Debt	16,036	14,770
Postretirement Benefits	1,049	967
Deferred Taxes	19	491
Other Liabilities	2,350	2,810
Total Liabilities	29,945	32,136
Equity
Common stock	12,970	13,078
Treasury stock	(3,033)	(3,631)
Retained earnings	7,018	18,751
Accumulated other comprehensive loss	(4,884)	(4,438)
Schlumberger stockholders' equity	12,071	23,760
Noncontrolling interests	418	416
Total equity	12,489	24,176
Liabilities and stockholders equity	$ 42,434	$ 56,312

CONSOLIDATED BALANCE SHEET (Par

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts on receivable	$ 301	$ 255	$ 249	$ 241

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income (loss)		$ (10,486)	$ (10,107)	$ 2,177
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Impairments and other charges and credits		12,515	12,901	141
Depreciation and amortization	[1]	2,566	3,589	3,556
Deferred taxes		(1,248)	(1,011)	(245)
Stock-based compensation expense		397	405	345
Pension and other postretirement benefits funding		(16)	(25)	(83)
Earnings of equity method investments, less dividends received		(28)	6	(48)
Change in assets and liabilities:
Decrease in receivables	[2]	2,345	142	430
Decrease (increase) in inventories	[2]	86	(314)	(10)
Decrease (increase) in other current assets	[2]	267	(68)	121
(Increase) decrease in other assets	[2]	(25)	22	(58)
Decrease in accounts payable and accrued liabilities	[2]	(3,330)	(161)	(824)
(Decrease) increase in estimated liability for taxes on income	[2]	(201)	6	(103)
Increase (decrease) in other liabilities	[2]	19	(52)	69
Other	[2]	83	98	245
NET CASH PROVIDED BY OPERATING ACTIVITIES		2,944	5,431	5,713
Cash flows from investing activities:
Capital expenditures		(1,116)	(1,724)	(2,160)
APS investments		(303)	(781)	(981)
Multiclient seismic data capitalized		(101)	(231)	(100)
Net proceeds from divestitures		434	348
Proceeds from formation of Sensia joint venture			238
Proceeds from sale of WesternGeco marine seismic business, net of cash divested				579
Business acquisitions and investments, net of cash acquired		(33)	(23)	(292)
(Purchase) sale of investments, net		(1,141)	317	1,943
Other		(93)	(155)	(29)
NET CASH USED IN INVESTING ACTIVITIES		(2,353)	(2,011)	(1,040)
Cash flows from financing activities:
Dividends paid		(1,734)	(2,769)	(2,770)
Proceeds from employee stock purchase plan		146	196	227
Proceeds from exercise of stock options			23	34
Stock repurchase program		(26)	(278)	(400)
Proceeds from issuance of long-term debt		5,837	4,004	898
Repayment of long-term debt		(4,975)	(4,799)	(2,861)
Net increase (decrease) in short-term borrowings		156	(44)	(85)
Repayment of finance lease-related obligations		(188)
Other		(89)	(51)	(63)
NET CASH USED IN FINANCING ACTIVITIES		(873)	(3,718)	(5,020)
Net decrease in cash before translation effect		(282)	(298)	(347)
Translation effect on cash		(11)	2	(19)
Cash, beginning of period		1,137	1,433	1,799
Cash, end of period		$ 844	$ 1,137	$ 1,433
[1]	Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and APS investments.
[2]	Net of the effect of business acquisitions and divestitures.

CONSOLIDATED STATEMENT OF STOCK

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Millions, $ in Millions	Total	Common Stock Issued	Common Stock In Treasury	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interests
Balance at Dec. 31, 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)
Net income (loss)	$ 2,177			2,138		39
Currency translation adjustments	(196)				(191)	(5)
Changes in unrealized gain on marketable securities	(11)				(11)
Changes in fair value of cash flow hedges	(15)				(15)
Pension and other postretirement benefit plans	(22)				(22)
Shares sold to optionees, less shares exchanged	$ 34	$ (41)	$ 75
Shares sold to optionees, less shares exchanged, shares	1		1
Vesting of restricted stock		(72)	$ 72
Vesting of restricted stock, shares	1		1
Shares issued under employee stock purchase plan	$ 227	(67)	$ 294
Shares issued under employee stock purchase plan, shares	3		3
Stock repurchase program	$ (400)		$ (400)
Stock repurchase program, shares	(6)		(6)
Stock-based compensation expense	$ 345	345
Dividends declared	(2,770)			(2,770)
Stranded tax related to US pension	(109)			109	(109)
Other	(44)	(8)	$ 2	(9)		(29)
Balance at Dec. 31, 2018	$ 36,586	$ 13,132	$ (4,006)	31,658	(4,622)	424
Balance, shares at Dec. 31, 2018	1,383	1,434
Treasury shares, Balance at Dec. 31, 2018			(51)
Net income (loss)	$ (10,107)			(10,137)		30
Currency translation adjustments	66				67	(1)
Changes in fair value of cash flow hedges	(22)				(22)
Pension and other postretirement benefit plans	139				139
Shares sold to optionees, less shares exchanged	$ 23	$ (26)	$ 49
Shares sold to optionees, less shares exchanged, shares	1		1
Vesting of restricted stock		(155)	$ 155
Vesting of restricted stock, shares	2		2
Shares issued under employee stock purchase plan	$ 196	(249)	$ 445
Shares issued under employee stock purchase plan, shares	6		6
Stock repurchase program	$ (278)		$ (278)
Stock repurchase program, shares	(7)		(7)
Stock-based compensation expense	$ 405	405
Dividends declared	(2,770)			(2,770)
Other	(62)	(29)	$ 4			(37)
Balance at Dec. 31, 2019	$ 24,176	$ 13,078	$ (3,631)	18,751	(4,438)	416
Balance, shares at Dec. 31, 2019	1,385	1,434
Treasury shares, Balance at Dec. 31, 2019			(49)
Net income (loss)	$ (10,486)			(10,518)		32
Currency translation adjustments	(232)				(239)	7
Changes in fair value of cash flow hedges	(36)				(36)
Pension and other postretirement benefit plans	$ (171)				(171)
Shares sold to optionees, less shares exchanged, shares	6		6
Vesting of restricted stock		$ (173)	$ 173
Vesting of restricted stock, shares	2		2
Shares issued under employee stock purchase plan	$ 146	(298)	$ 444
Stock repurchase program	$ (26)		$ (26)
Stock repurchase program, shares	(1)		(1)
Stock-based compensation expense	$ 397	397
Dividends declared	(1,215)			(1,215)
Other	(64)	(34)	$ 7			(37)
Balance at Dec. 31, 2020	$ 12,489	$ 12,970	$ (3,033)	$ 7,018	$ (4,884)	$ 418
Balance, shares at Dec. 31, 2020	1,392	1,434
Treasury shares, Balance at Dec. 31, 2020			(42)

CONSOLIDATED STATEMENT OF STO_2

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retained Earnings
Dividends declared, per share	$ 0.875	$ 2	$ 2

Business Description

Business Description	12 Months Ended
	Dec. 31, 2020
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”) form a technology company that partners with customers to access energy. Schlumberger provides leading digital solutions and deploys innovative technologies to enable performance and sustainability for the global energy industry. Schlumberger collaborates to create technology that unlocks access to energy for the benefit of all.

Summary of Accounting Policies

Summary of Accounting Policies	12 Months Ended
	Dec. 31, 2020
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, the 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 for certain long-term construction-type contracts over time; recoverability of fixed assets, goodwill, intangible assets, Asset Performance Solutions 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 adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers Consolidated Financial Statements Schlumberger recognizes revenue upon the transfer of control of promised products or services to customers at an amount that reflects the consideration it expects to receive in exchange for these products or services. The vast majority of Schlumberger’s services and product offerings are short-term in nature. The time between invoicing and when payment is due under these arrangements is generally between 30 to 60 days. Revenue is occasionally generated from contractual arrangements that include multiple performance obligations. Revenue from these arrangements is allocated to each performance obligation based on its relative standalone selling price. Standalone selling prices are generally determined based on the prices charged to customers or using expected costs plus margin. Revenue is recognized for certain long-term construction-type contracts over time. These contracts involve significant design and engineering efforts in order to satisfy custom designs for customer-specific applications. Revenue is recognized as work progresses on each contract. Progress is measured by the ratio of actual costs incurred to date on the project in relation to total estimated project costs. The estimate of total project costs has a significant impact on both the amount of revenue recognized as well as the related profit on a project. Revenue and profits on contracts can also be significantly affected by change orders and claims. Due to the nature of these projects, adjustments to estimates of contract revenue and total contract costs may be required as work progresses. Progress billings are generally issued upon completion of certain phases of work as stipulated in the contract. Any expected losses on a project are recorded in full in the period in which they become probable. Due to the nature of its businesses, Schlumberger does not have significant backlog. Total backlog was $2.6 billion at December 31, 2020, of which approximately 60% is expected to be recognized as revenue during 2021. Short-term Investments Short-term investments are comprised primarily of money market funds, time deposits, certificates of deposit, commercial paper, bonds and notes, substantially all of which are denominated in US dollars and are stated at cost plus accrued interest, which approximates fair value. 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 Interest and other income 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. Asset Performance Solutions Asset Performance Solutions (“APS”) projects are focused on developing and co-managing production of customers’ assets under long-term agreements. Schlumberger invests its own services and products, and in certain historical 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 generally compensated based on cash flow generated or on a fee-per-barrel basis. This includes certain arrangements whereby Schlumberger is only compensated based on incremental production it helps deliver above a mutually agreed baseline. Schlumberger capitalizes its cash investments in a project as well as the direct costs associated with providing services or products for which Schlumberger will be compensated when the related production is achieved. These capitalized investments are amortized to the Consolidated Statement of Income (Loss) The unamortized portion of Schlumberger’s investments in APS projects was $1.713 billion and $3.724 billion at December 31, 2020 and 2019, 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, receivables from clients and derivative financial instruments. Schlumberger places its cash and short-term investments 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 generates revenue in more than 120 countries and as such, its accounts receivable are spread over many countries and customers. Mexico represented approximately 14% of Schlumberger’s net accounts receivable balance at December 31, 2020. No other country accounted for greater than 10% of Schlumberger’s accounts receivable balance. Schlumberger maintains an allowance for uncollectible accounts receivable based on expected collectability and performs ongoing credit evaluations of its customers’ financial condition. If the financial condition of Schlumberger’s customers were to deteriorate resulting in an impairment of their ability to make payments, adjustments to the allowance may be required. Earnings per Share The following is a reconciliation from basic to diluted earnings (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 2020: Basic $ (10,518 ) 1,390 $ (7.57 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (10,518 ) 1,390 $ (7.57 ) 2019: Basic $ (10,137 ) 1,385 $ (7.32 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (10,137 ) 1,385 $ (7.32 ) 2018: Basic $ 2,138 1,385 $ 1.54 Assumed exercise of stock options - - Unvested restricted stock - 8 Diluted $ 2,138 1,393 $ 1.53 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) 2020 2019 2018 Employee stock options 48 46 40 Unvested restricted stock 19 12 - 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, 2020
Restructuring And Related Activities [Abstract]
Charges and Credits	3. Charges and Credits 2020 Schlumberger recorded the following charges and credits during 2020, all of which, unless otherwise noted, are classified in Impairments & other Consolidated Statement of Income (Loss) (Stated in millions) Pretax Tax Net First quarter: Goodwill $ 3,070 $ - $ 3,070 Intangible assets impairments 3,321 815 2,506 Asset Performance Solutions investments 1,264 (4 ) 1,268 North America pressure pumping impairment 587 133 454 Workforce reductions 202 7 195 Other 79 9 70 Valuation allowance - (164 ) 164 Second quarter: Workforce reductions 1,021 71 950 Asset Performance Solutions investments 730 15 715 Fixed asset impairments 666 52 614 Inventory write-downs 603 49 554 Right-of-use asset impairments 311 67 244 Costs associated with exiting certain activities 205 (25 ) 230 Multiclient seismic data impairment 156 2 154 Repurchase of bonds 40 2 38 Postretirement benefits curtailment gain (69 ) (16 ) (53 ) Other 60 4 56 Third quarter: Facility exit charges 254 39 215 Workforce reductions 63 - 63 Other 33 1 32 Fourth quarter: Gain on sale of OneStim (104 ) (11 ) (93 ) Unrealized gain on marketable securities (39 ) (9 ) (30 ) Other 62 4 58 $ 12,515 $ 1,041 $ 11,474 First quarter 2020: • Geopolitical events that increased the supply of low-priced oil to the global market occurred at the same time that demand weakened due to the worldwide effects of the COVID-19 pandemic, leading to a collapse in oil prices during March 2020. As a result, Schlumberger’s market capitalization deteriorated significantly compared to the end of 2019. Schlumberger’s stock price reached a low during the first quarter of 2020 not seen since 1995. Additionally, the Philadelphia Oil Services Sector index, which is comprised of companies involved in the oil services sector, reached an all-time low. As a result of these facts, Schlumberger determined that it was more likely than not that the fair value of certain of its reporting units was less than their carrying value. Therefore, Schlumberger performed an interim goodwill impairment test. Schlumberger had 11 reporting units with goodwill balances aggregating $16.0 billion. Schlumberger determined that the fair value of four of its reporting units, representing $4.5 billion of goodwill, was substantially in excess of their carrying value. Schlumberger performed a detailed quantitative impairment assessment of the remaining seven reporting units, which represented $11.5 billion of goodwill. As a result of this assessment, Schlumberger concluded that the goodwill associated with each of these seven reporting units was impaired, resulting in a $3.1 billion goodwill impairment charge. Following the $3.1 billion goodwill impairment charge relating to these seven reporting units, six of these reporting units had a remaining goodwill balance. These goodwill balances ranged between $0.2 billion and $5.0 billion and aggregated to $8.4 billion as of March 31, 2020. Schlumberger used the income approach to estimate the fair value of its reporting units, but also considered the market approach to validate the results. The income approach estimates the fair value by discounting each reporting unit’s estimated future cash flows using Schlumberger’s estimate of the discount rate, or expected return, that a marketplace participant would have required as of the valuation date. The market approach includes the use of comparative multiples to corroborate the discounted cash flow results. The market approach involves significant judgement involved in the selection of the appropriate peer group companies and valuation multiples. Some of the more significant assumptions inherent in the income approach include the estimated future net annual cash flows for each reporting unit and the discount rate. Schlumberger selected the assumptions used in the discounted cash flow projections using historical data supplemented by current and anticipated market conditions and estimated growth rates. Schlumberger’s estimates are based upon assumptions believed to be reasonable. However, given the inherent uncertainty in determining the assumptions underlying a discounted cash flow analysis, particularly in a volatile market, actual results may differ from those used in Schlumberger’s valuations which could result in additional impairment charges in the future. The discount rates utilized to value Schlumberger’s reporting units were between 12.0% and 13.5%, depending on the risks and uncertainty inherent in the respective reporting unit as well as the size of the reporting unit. Assuming all other assumptions and inputs used in each of the respective discounted cash flow analysis were held constant, a 50-basis point increase or decrease in the discount rate assumptions would have changed the fair value of the seven reporting units, on average, by less than 5%. • The negative market indicators described above were triggering events that indicated that certain of Schlumberger’s long-lived intangible and tangible assets may have been impaired. Recoverability testing indicated that certain long-lived assets were impaired. The estimated fair value of these assets was determined to be below their carrying value. As a result, Schlumberger recorded the following impairment charges: - $3.3 billion relating to intangible assets, of which $2.2 billion relates to Schlumberger’s 2016 acquisition of Cameron International Corporation and $1.1 billion relates to Schlumberger’s 2010 acquisition of Smith International, Inc. Following this impairment charge, the carrying value of the impaired intangible assets was approximately $0.9 billion. - $1.3 billion relating to the carrying value of certain APS projects in North America. - $0.6 billion of fixed assets associated with the pressure pumping business in North America. • $202 million of severance. • $79 million of other restructuring charges, primarily consisting of the impairment of an equity method investment that was determined to be other-than-temporarily impaired. • $164 million relating to a valuation allowance against certain deferred tax assets. Second quarter 2020: • As previously noted, late in the first quarter of 2020 geopolitical events that increased the supply of low-priced oil to the global market occurred at the same time as demand weakened due to the worldwide effects of the COVID-19 pandemic, which led to a collapse in oil prices. As a result, the second quarter of 2020 was the most challenging quarter in decades. Schlumberger responded to these market conditions by taking actions to restructure its business and rationalize its asset base during the second quarter of 2020. These actions included reducing headcount, closing facilities and exiting business lines in certain countries. Additionally, due to the resulting activity decline, Schlumberger had assets that would no longer be utilized. As a consequence of these circumstances and decisions, Schlumberger recorded the following restructuring and asset impairment charges: - $1.021 billion of severance associated with reducing its workforce by more than 21,000 employees. - $730 million relating to the carrying value of certain APS projects in Latin America. - $666 million of fixed asset impairments primarily relating to equipment that would no longer be utilized and facilities it exited. - $603 million write-down of the carrying value of inventory to its net realizable value. - $ 311 million write-down of right-of-use assets under operating leases associated with leased facilities Schlumberger exited and excess equipment. - $205 million of costs associated with exiting certain activities. - $156 million impairment of certain multiclient seismic data. - $60 million of other costs, including a $42 million increase in the allowance for the doubtful accounts. • During the second quarter of 2020, Schlumberger repurchased certain Senior Notes (see Note 9 – Long-term Debt ), which resulted in a $40 million charge. • As a consequence of the workforce reductions described above, Schlumberger recorded a curtailment gain of $69 million relating to its US postretirement medical plan. See Note 17 – Pension and Other Postretirement Benefit Plans for further details. The fair value of the impaired intangible assets, fixed assets, APS investments, right-of-use assets and multiclient seismic data was estimated based on the present value of projected future cash flows that the underlying assets are expected to generate. Such estimates included unobservable inputs that required significant judgement. Third quarter 2020: • During the third quarter of 2020, Schlumberger recorded the following restructuring charges: - $254 million of facility exit charges as Schlumberger continued to rationalize its real estate footprint relating to both leased and owned facilities. - $63 million of severance. - $33 million of other charges. Fourth quarter 2020: • On December 31, 2020, Schlumberger contributed its onshore hydraulic fracturing business in the United States and Canada (“OneStim”), including its pressure pumping, pumpdown perforating and Permian frac sand business to Liberty Oilfield Services Inc. (“Liberty”) in exchange for a 37% equity interest in Liberty. As a result of this transaction, Schlumberger recognized a gain of $104 million during the fourth quarter of 2020. This gain is classified in Gains on sales of businesses in the Consolidated Statement of Income (Loss) . Schlumberger will account for its investment in Liberty under the equity method of accounting and will record its share of Liberty’s net income on a one-quarter lag. Based on the quoted market price of Liberty’s shares as of December 31, 2020, the value of Schlumberger’s investment is approximately $0.7 billion. • During the fourth quarter of 2020, a start-up company that Schlumberger previously invested in completed an initial public offering. As a result, Schlumberger recognized an unrealized gain of $39 million to increase the carrying value of this investment to its fair value of approximately $43 million. This unrealized gain is reflected in Interest and other income in the Consolidated Statement of Income (Loss) . • During the fourth quarter of 2020, Schlumberger entered into an agreement to purchase new software licenses. This transaction rendered certain previously purchased licenses obsolete. As a result, Schlumberger wrote off the remaining $62 million of net book value associated with the obsolete software licenses. As market conditions evolve and Schlumberger continues to develop its strategy to deal with such conditions, it may result in further restructuring and/or impairment charges in future periods. 2019 Schlumberger recorded the following charges and credits during 2019, all of which are classified as Impairments & other Consolidated Statement of Income (Loss) (Stated in millions) Pretax Tax Net Third quarter: Goodwill impairment $ 8,828 $ 43 $ 8,785 Intangible assets impairment 1,085 248 837 North America pressure pumping 1,575 344 1,231 Other North America-related 310 53 257 Argentina 127 - 127 Equity-method investments 231 12 219 Asset Performance Solutions investments 294 - 294 Other 242 13 229 Fourth quarter: North America restructuring 225 51 174 Other restructuring 104 (33 ) 137 Workforce reductions 68 8 60 Pension settlement accounting 37 8 29 Repurchase of bonds 22 5 17 Gain on formation of Sensia joint venture (247 ) (42 ) (205 ) $ 12,901 $ 710 $ 12,191 Third quarter of 2019: • During August 2019, Schlumberger’s market capitalization deteriorated significantly compared to the end of the second quarter of 2019. Schlumberger’s stock price reached a low not seen since 2005. Additionally, the Philadelphia Oil Services Sector Index, which is comprised of companies in the oil services sector, reached an 18-year low. As a result of these facts, Schlumberger determined that it was more likely than not that the fair value of certain of its reporting units was less than their carrying value. Therefore, Schlumberger performed an interim goodwill impairment test as of August 31, 2019. As of August 31, 2019, Schlumberger had 17 reporting units with goodwill balances aggregating $25.0 billion. Schlumberger determined that the fair value of seven of its reporting units, representing approximately $13.8 billion of the goodwill, was substantially in excess of their carrying value. Schlumberger performed a detailed quantitative impairment assessment of the remaining 10 reporting units, which represented $11.2 billion of goodwill. As a result of this assessment, Schlumberger concluded that the goodwill associated with nine of the 10 reporting units was impaired, resulting in an $8.8 billion goodwill impairment charge. Schlumberger primarily used the income approach to estimate the fair value of its reporting units, but also considered the market approach to validate the results. The income approach estimates the fair value by discounting each reporting unit’s estimated future cash flows using Schlumberger’s estimate of the discount rate, or expected return, that a marketplace participant would have required as of the valuation date. The market approach includes the use of comparative multiples to corroborate the discounted cash flow results. The market approach involves significant judgement involved in the selection of the appropriate peer group companies and valuation multiples. Some of the more significant assumptions inherent in the income approach include the estimated future net annual cash flows for each reporting unit and the discount rate. Schlumberger selected the assumptions used in the discounted cash flow projections using historical data supplemented by current and anticipated market conditions and estimated growth rates. Schlumberger’s estimates are based upon assumptions believed to be reasonable. The discount rates utilized to value Schlumberger’s reporting units were between 12.5% and 14.0%, depending on the risks and uncertainty inherent in the respective reporting unit. Assuming all other assumptions and inputs used in each of the respective discounted cash flow analysis were held constant, a 50 basis point increase in the discount rate assumption would have increased the goodwill impairment charge by approximately $0.3 billion. Conversely, assuming all other assumptions and inputs used in each of the respective discounted cash flow analysis were held constant, a 50 basis point decrease in the discount rate assumption would have decreased the goodwill impairment charge by approximately $0.4 billion. • The negative market indicators described above combined with deteriorating market conditions in North America, as well as the results of the previously mentioned fair value determinations of certain of Schlumberger’s reporting units and the appointment of a new Chief Executive Officer, were all triggering events that indicated that certain of Schlumberger’s long-lived tangible and intangible assets may be impaired. Recoverability testing, which was performed as of August 31, 2019, indicated that long-lived assets associated with certain asset groups were impaired. The estimated fair value of these asset groups was determined to be below their carrying value. As a result, Schlumberger recorded the following impairment and related charges: - $1.085 billion of intangible assets, of which $842 million relates to Schlumberger’s 2010 acquisition of Smith International, Inc. The remaining $243 million primarily relates to other acquisitions in North America. - $1.575 billion of charges relating to Schlumberger’s pressure pumping business in North America. This amount consists of $1.324 billion of pressure pumping equipment and related assets; $98 million of right-of-use assets under operating leases; $121 million relating to a supply contract; $19 million of inventory; and $13 million of severance. - $310 million of charges primarily relating to other businesses in North America, consisting of $230 million of fixed asset impairments, $70 million of inventory write-downs and $10 million of severance. • As a result of the economic challenges in Argentina, Schlumberger recorded $127 million of charges during the third quarter of 2019. This consists of $72 million of asset impairments, a $26 million devaluation charge and $29 million of severance. • Schlumberger also recorded the following impairment and restructuring charges during the third quarter of 2019: - $231 million relating to certain equity method investments that were determined to be other-than-temporarily impaired. - $294 million impairment relating to the carrying value of certain smaller APS projects. - $242 million of restructuring charges consisting of: $62 million of severance; $57 million relating to the acceleration of stock-based compensation expense associated with certain individuals; $49 million of business divestiture costs; $29 million relating to the repurchase of certain Senior Notes (see Note 9 - Long-term Debt ); and $45 million of other provisions. The fair value of certain of the assets impaired during the fourth quarter of 2019 was estimated based on the present value of projected future cash flows that the underlying assets are expected to generate. Such estimates included unobservable inputs that required significant judgment. Fourth quarter of 2019: • Schlumberger recorded the following restructuring charges during the fourth quarter of 2019: - $225 million associated with facility closures and costs to exit certain activities in North America. These charges included $123 million relating to fixed assets; $55 million of right-of-use assets under operating leases; and $47 million of other exit costs. - $104 million primarily relating to restructuring certain activities outside of North America, which included $68 million associated with assets to be divested and $36 million of facility closure costs. - $68 million of severance associated with streamlining its operations and exiting certain activities. • Certain of Schlumberger’s defined benefit pension plans offered former Schlumberger employees, who had not yet commenced receiving their pension benefits, an opportunity to receive a lump sum payout of their vested pension benefit which resulted in Schlumberger recording a pension settlement charge of $37 million in the fourth quarter of 2019. See Note 17 – Pension and Other Postretirement Benefit Plans for further details • During the fourth quarter of 2019, Schlumberger repurchased certain Senior Notes (see Note 9 – Long-term Debt ), which resulted in a $22 million charge • On October 1, 2019, Schlumberger and Rockwell completed the formation of Sensia, a joint venture that is the oil and gas industry’s first digitally enabled integrated automation solutions provider. Rockwell Automation owns 53% of the joint venture and Schlumberger owns 47%. In connection with this transaction, Schlumberger received a cash payment of $238 million. Schlumberger will account for its investment under the equity method of accounting. During the fourth quarter of 2019, Schlumberger recorded a $247 million gain as a result of the deconsolidation of certain of its businesses in connection with the formation of the joint venture. This gain, which is equal to the sum of the $238 million of cash proceeds received and the fair value of Schlumberger’s retained noncontrolling investment in the businesses it contributed less the carrying amount of the assets and liabilities of such businesses at the time of the closing, is classified as Gains on sale of businesses in the Consolidated Statement of Income (Loss) . 2018 During 2018, Schlumberger recorded the following charges and credits: (Stated in millions) Pretax Tax Net Gain on sale of marine seismic acquisition business $ (215 ) $ (19 ) $ (196 ) Workforce reductions 184 20 164 Asset impairments 172 16 156 $ 141 $ 17 $ 124 • During the fourth quarter of 2018, Schlumberger completed the divestiture of its marine seismic acquisition business to Shearwater GeoServices (“Shearwater”) for $600 million of cash and a 15% equity interest in Shearwater. As a result of this transaction, Schlumberger recognized a $215 million gain. This gain is classified in Gain on sale of business in the Consolidated Statement of Income (Loss). • During the fourth quarter of 2018, Schlumberger recorded $172 million of charges to fully impair certain long-lived assets. This amount is classified in Impairments & other in the Consolidated Statement of Income (Loss) . • During the second quarter of 2018, Schlumberger recorded a $184 million charge associated with workforce reductions, primarily to further streamline its support cost structure. This charge is classified in Impairment & other in the Consolidated Statement of Income (Loss) .

Inventories

Inventories	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Inventories	4. Inventories Inventories, which are stated at the lower of average cost or net realizable value, consist of the following: (Stated in millions) 2020 2019 Raw materials & field materials $ 1,573 $ 1,857 Work in progress 464 515 Finished goods 1,317 1,758 $ 3,354 $ 4,130

Fixed Assets

Fixed Assets	12 Months Ended
	Dec. 31, 2020
Property Plant And Equipment [Abstract]
Fixed Assets	5. Fixed Assets Fixed assets consist of the following: (Stated in millions) 2020 2019 Land $ 362 $ 483 Buildings & improvements 3,757 5,156 Machinery & equipment 25,625 29,370 29,744 35,009 Less: Accumulated depreciation 22,918 25,739 $ 6,826 $ 9,270 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. Depreciation expense, which is recorded on a straight-line basis, was $1.6 billion, $2.0 billion and $2.1 billion in 2020, 2019 and 2018, respectively.

Multiclient Seismic Data

Multiclient Seismic Data	12 Months Ended
	Dec. 31, 2020
Multiclient Seismic Data [Abstract]
Multiclient Seismic Data	6. Multiclient Seismic Data The change in the carrying amount of multiclient seismic data is as follows: (Stated in millions) 2020 2019 Balance at beginning of year $ 568 $ 601 Capitalized in period 101 231 Charged to expense (174 ) (264 ) Impairment charge (see Note 3) (156 ) - Other (22 ) - $ 317 $ 568

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	7. Goodwill The changes in the carrying amount of goodwill by segment were as follows: (Stated in millions) Reservoir Characterization Drilling Production Cameron Total Balance, January 1, 2019 $ 4,703 $ 10,111 $ 4,678 $ 5,439 $ 24,931 Impairment (see Note 3) (97 ) (3,025 ) (705 ) (5,001 ) (8,828 ) Impact of changes in exchange rates and other (46 ) 6 (24 ) 3 (61 ) Balance, December 31, 2019 4,560 7,092 3,949 441 16,042 Impairment (see Note 3) - (1,659 ) (1,228 ) (183 ) (3,070 ) Impact of changes in exchange rates and other - 10 (17 ) 3 (4 ) Balance, September 30, 2020 $ 4,560 $ 5,443 $ 2,704 $ 261 $ 12,968 In connection with the change in reportable segments discussed in Note 16 – Segment Information (Stated in millions) Digital & Reservoir Well Production Integration Performance Construction Systems Total Balance, October 1, 2020 $ 2,041 $ 3,806 $ 6,267 $ 854 $ 12,968 Impact of changes in exchange rates and other 6 (4 ) 11 (1 ) 12 Balance, December 31, 2020 $ 2,047 $ 3,802 $ 6,278 $ 853 $ 12,980

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	8. Intangible Assets Intangible assets consist of the following: (Stated in millions) 2020 2019 Gross Accumulated Net Book Gross Accumulated Net Book Book Amortization Value Book Value Amortization Value Customer Relationships $ 1,744 $ 485 $ 1,259 $ 3,779 $ 868 $ 2,911 Technology/Technical Know-How 1,284 488 796 2,498 779 1,719 Tradenames 767 166 601 1,885 264 1,621 Other 1,488 689 799 1,514 676 838 $ 5,283 $ 1,828 $ 3,455 $ 9,676 $ 2,587 $ 7,089 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 $371 million in 2020, $618 million in 2019 and $673 million in 2018. Based on the carrying value of intangible assets at December 31, 2020, amortization expense for the subsequent five years is estimated to be as follows: 2021: $307 million, 2022: $304 million, 2023: $293 million, 2024: $269 million and 2025: $259 million.

Long-term Debt and Debt Facilit

Long-term Debt and Debt Facility Agreements	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Long-term Debt and Debt Facility Agreements	9. Long-term Debt and Debt Facility Agreements Long-term Debt consists of the following: (Stated in millions) 2020 2019 3.65% Senior Notes due 2023 $ 1,496 $ 1,495 3.90% Senior Notes due 2028 1,450 1,444 2.65% Senior Notes due 2030 1,250 - 1.375% Guaranteed Notes due 2026 1,221 - 2.00% Guaranteed Notes due 2032 1,214 - 0.25% Notes due 2027 1,100 550 0.50% Notes due 2031 1,099 544 2.40% Senior Notes due 2022 999 998 4.00% Senior Notes due 2025 930 929 4.30% Senior Notes due 2029 846 845 3.75% Senior Notes due 2024 746 746 1.00% Guaranteed Notes due 2026 736 665 0.00% Notes due 2024 611 551 2.65% Senior Notes due 2022 598 598 1.40% Senior Notes due 2025 498 - 3.63% Senior Notes due 2022 295 294 7.00% Notes due 2038 206 208 5.95% Notes due 2041 114 114 5.13% Notes due 2043 99 99 4.00% Notes due 2023 80 81 3.70% Notes due 2024 55 55 3.30% Senior Notes due 2021 - 1,597 4.20% Senior Notes due 2021 - 600 Commercial paper borrowings 393 2,222 Other - 135 $ 16,036 $ 14,770 During the third quarter of 2020, Schlumberger issued $500 million of 1.40% Senior Notes due 2025 and $350 million of 2.65% Senior Notes due 2030. During the second quarter of 2020, Schlumberger issued €1.0 billion of 1.375% Guaranteed Notes due 2026, $900 million of 2.65% Senior Notes due 2030 and €1.0 billion of 2.00% Guaranteed Notes due 2032. During the second quarter of 2020, Schlumberger repurchased all $600 million of its 4.20% Senior Notes due 2021 and $935 million of its 3.30% Senior Notes due 2021. Schlumberger paid a premium of approximately $40 million in connection with these repurchases. This premium was classified in Impairments & other Consolidated Statement of Income (Loss) Charges and Credits During the second quarter of 2020, Schlumberger established 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. At December 31, 2020, Schlumberger had not issued any debt under this program. During the first quarter of 2020, Schlumberger issued €400 million of 0.25% Notes due 2027 and €400 million of 0.50% Notes due 2031. During the fourth quarter of 2019, Schlumberger repurchased the remaining $416 million of its 3.00% Senior Notes due 2020; $126 million of its 4.50% Senior Notes due 2021; $500 million of its 4.20% Senior Notes due 2021; and $106 million of its 3.60% Senior Notes due 2022. Impairments & other Consolidated Statement of Income (Loss) Charges and Credits During the third quarter of 2019, Schlumberger issued €500 million of 0.00% Notes due 2024, €500 million of 0.25% Notes due 2027 and €500 million of 0.50% Notes due 2031. During the third quarter of 2019, Schlumberger repurchased $783 million of its 3.00% Senior Notes due 2020 and $321 million of its 3.625% Senior Notes due 2022. Schlumberger paid a premium of $29 million in connection with these repurchases. This premium was classified as Impairments & other Consolidated Statement of Income (Loss) Charges and Credits. During the second quarter of 2019, Schlumberger completed a debt exchange offer, pursuant to which it issued $1.500 billion in principal of 3.90% Senior Notes due 2028 (the “New Notes”) in exchange for $401 million of 3.00% Senior Notes due 2020, $234 million of 3.63% Senior Notes due 2022 and $817 million of 4.00% Senior Notes due 2025. In connection with the exchange of principal, Schlumberger paid a premium of $48 million, substantially all of which was in the form of New Notes. This premium is being amortized as additional interest expense over the term of the New Notes. During the first quarter of 2019 Schlumberger issued $750 million of 3.75% Senior Notes due 2024 and $850 million of 4.30% Senior Notes due 2029. At December 31, 2020, Schlumberger had committed credit facility agreements with commercial banks aggregating $6.25 billion, of which $5.86 billion was available and unused. These committed facilities support commercial paper programs in the United States and Europe, of which 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 programs at December 31, 2020 were $0.4 billion, all of which was classified in Long-term debt Consolidated Balance Sheet Long-term debt Consolidated Balance Sheet The weighted average interest rate on variable rate debt as of December 31, 2020 was 1.0%. Long-term Debt as of December 31, 2020 is due as follows: $1.9 billion in 2022, $1.9 billion in 2023, $1.4 billion in 2024, $1.5 billion in 2025, $2.0 billion in 2026, $1.1 billion in 2027 and $6.3 billion thereafter. The fair value of Schlumberger’s Long-term Debt Schlumberger Limited fully and unconditionally guarantees the securities issued by certain of its subsidiaries, including securities issued by Schlumberger Investment SA and Schlumberger Finance Canada Ltd., both wholly-owned subsidiaries of Schlumberger Limited.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2020
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	10. Derivative Instruments and Hedging Activities As a multinational company, Schlumberger conducts its business in over 120 countries. Schlumberger’s functional currency is primarily the US dollar. Approximately 73% of Schlumberger’s revenues in 2020 were 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 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 changes in the fair value of the hedge recorded on the Consolidated Balance Sheet Accumulated Other Comprehensive Loss. Accumulated Other Comprehensive Loss 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 cross-currency swaps to provide a hedge against these cash flow risks. Included in Other Assets Other Liabilities During 2019, a US-dollar functional currency subsidiary of Schlumberger issued €1.5 billion of Euro-denominated debt. Schlumberger entered into cross-currency swaps for an aggregate notional amount of €1.5 billion in order to hedge changes in the fair value of its €0.5 billion 0.00% Notes due 2024, €0.5 billion 0.25% Notes due 2027 and €0.5 billion 0.50% Notes due 2031. These cross-currency swaps effectively convert the Euro-denominated notes to US-dollar denominated debt with fixed annual interest rates of 2.29%, 2.51% and 2.76%, respectively. During the first quarter of 2020, a US-dollar functional currency subsidiary of Schlumberger issued €0.8 billion of Euro-denominated debt. Schlumberger entered into cross-currency swaps for an aggregate notional amount of €0.8 billion in order to hedge changes in the fair value of its €0.4 billion of 0.25% Notes due 2027 and €0.4 billion of 0.50% Notes due 2031. These cross-currency swaps effectively convert the Euro-denominated notes to US-dollar denominated debt with fixed annual interest rates of 1.87% and 2.20%, respectively. During the second quarter of 2020, a US-dollar functional currency subsidiary of Schlumberger issued €2.0 billion of Euro-denominated debt. Schlumberger entered into cross-currency swaps for an aggregate notional amount of €2.0 billion in order to hedge changes in the fair value of its €1.0 billion of 1.375% Guaranteed Notes due 2026 and €1.0 billion of 2.00% Guaranteed Notes due 2032. These cross-currency swaps effectively convert the swapped portion of the Euro-denominated notes to US-dollar denominated debt with fixed annual interest rates of 2.77% and 3.49%, respectively. During the third quarter of 2020, a Canadian dollar functional currency subsidiary of Schlumberger issued $0.5 billion of US dollar denominated debt. Schlumberger entered into cross-currency swaps for an aggregate notional amount of $0.5 billion in order to hedge changes in the fair value of its $0.5 billion 1.40% Senior Notes due 2025. These cross-currency swaps effectively convert the US dollar notes to Canadian dollar denominated debt with a fixed annual interest rate of 1.73%. 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 (Loss), Consolidated Statement of Income (Loss) At December 31, 2020, contracts were outstanding for the US dollar equivalent of $8.6 billion in various foreign currencies, of which $6.4 billion relates to hedges of debt denominated in currencies other than the functional currency. Other than the previously mentioned cross-currency swaps, the fair value of the other outstanding derivatives was not material at December 31, 2020 and 2019. The effect of derivative instruments designated as hedges and those not designated as hedges on the Consolidated Statement of Income (Loss) (Stated in millions) Gain (Loss) Recognized in Income (Loss) Consolidated Statement 2020 2019 2018 of Income (Loss) Classification Derivatives designated as cash flow hedges: Cross currency swap $ 493 $ (35 ) $ 55 Cost of services/sales Foreign exchange contracts (5 ) (10 ) (1 ) Cost of services/sales $ 488 $ (45 ) $ 54 Derivatives not designated as hedges: Foreign exchange contracts $ (29 ) $ (5 ) $ 40 Cost of services/sales Schlumberger does not enter into derivative transactions for speculative purposes.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2020
Equity [Abstract]
Stockholders' Equity	11. Stockholders’ Equity Schlumberger is authorized to issue 4,500,000,000 shares of common stock, par value $0.01 per share, of which 1,392,325,960 and 1,384,515,345 shares were outstanding on December 31, 2020 and 2019, 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, 2018 $ (2,139 ) $ 13 $ 3 $ (2,151 ) $ (4,274 ) Reclassification to Retained Earnings - - - (109 ) (109 ) Other comprehensive loss before reclassifications (191 ) (11 ) (16 ) (186 ) (404 ) Amounts reclassified from accumulated other comprehensive loss - - 1 182 183 Income taxes - - - (18 ) (18 ) Balance, December 31, 2018 (2,330 ) 2 (12 ) (2,282 ) (4,622 ) Other comprehensive loss before reclassifications 67 - (32 ) 127 162 Amounts reclassified from accumulated other comprehensive loss - - 10 83 93 Income taxes - - - (71 ) (71 ) Balance, December 31, 2019 (2,263 ) 2 (34 ) (2,143 ) (4,438 ) Other comprehensive loss before reclassifications (239 ) - (90 ) (247 ) (576 ) Amounts reclassified from accumulated other comprehensive loss - - 54 114 168 Income taxes - - - (38 ) (38 ) Balance, December 31, 2020 $ (2,502 ) $ 2 $ (70 ) $ (2,314 ) $ (4,884 ) Other comprehensive loss was $447 million in 2020 and $239 million in 2018. Other comprehensive income was $184 million in 2019.

Stock-based Compensation Plans

Stock-based Compensation Plans	12 Months Ended
	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation Plans	12. 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 may be granted stock options under Schlumberger stock option plans. 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 10 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: 2020 2019 2018 Dividend yield 5.2 % 4.8 % 2.6 % Expected volatility 26 % 25 % 26 % Risk-free interest rate 1.7 % 2.7 % 2.6 % Expected option life in years 7.0 7.0 7.0 Weighted-average fair value per share $ 5.07 $ 6.21 $ 17.37 The following table summarizes information related to options outstanding and options exercisable as of December 31, 2020: (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 $38.75 - $69.98 15,562 7.7 $ 44.48 3,846 $ 56.69 $70.31 - $76.74 9,462 2.1 $ 72.10 9,399 $ 72.06 $77.10 - $83.15 7,303 5.4 $ 79.29 5,425 $ 79.52 $83.89 - $88.77 8,549 3.0 $ 85.96 7,097 $ 85.66 $90.00 - $114.83 7,396 3.4 $ 95.79 7,396 $ 95.79 48,272 4.8 $ 70.37 33,163 $ 79.70 The weighted-average remaining contractual life of stock options exercisable as of December 31, 2020 was 3.3 years. The following table summarizes stock option activity during the years ended December 31, 2020, 2019 and 2018: (Shares stated in thousands) 2020 2019 2018 Weighted- Weighted- Weighted- Average Average Average Exercise Exercise Exercise Shares Price Shares Price Shares Price Outstanding at beginning of year 46,269 $ 75.65 43,529 $ 79.36 47,210 $ 79.13 Granted 7,468 $ 38.75 5,604 $ 41.50 2,121 $ 76.95 Exercised - $ - (1,045 ) $ 38.50 (936 ) $ 54.20 Forfeited (5,465 ) $ 71.86 (1,819 ) $ 74.69 (4,866 ) $ 84.19 Outstanding at year-end 48,272 $ 70.37 46,269 $ 75.65 43,529 $ 79.36 Stock options outstanding and stock options exercisable as of December 31, 2020 had no intrinsic value. The total intrinsic value of options exercised during the years ended December 31, 2019 and 2018 was Restricted Stock Schlumberger grants performance share units to its executive officers. The number of shares earned is determined at the end of each performance period 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 awarded. If Schlumberger falls below the threshold award performance level, no shares will be awarded. As of December 31, 2020, 3.8 million performance share units were outstanding assuming the achievement of 100% of target. All other restricted stock awards generally vest at the end of three years or vest ratably in equal tranches over a three-year period. Restricted stock awards 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) 2020 2019 2018 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 11,822 $ 49.86 6,951 $ 70.13 5,428 $ 72.33 Granted 10,637 $ 26.53 7,888 $ 35.56 3,204 $ 70.54 Vested (3,059 ) $ 71.56 (2,722 ) $ 72.09 (982 ) $ 77.62 Forfeited (637 ) $ 45.95 (295 ) $ 57.41 (699 ) $ 70.67 Unvested at year-end 18,763 $ 35.24 11,822 $ 49.86 6,951 $ 70.13 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: 2020 2019 2018 Dividend yield 4.0 % 5.3 % 2.9 % Expected volatility 43 % 30 % 22 % Risk-free interest rate 0.88 % 2.3 % 1.6 % Weighted-average fair value per share $ 5.38 $ 5.81 $ 9.01 Total Stock-based Compensation Expense The following summarizes stock-based compensation expense recognized in income: (Stated in millions) 2020 2019 2018 Stock options $ 75 $ 99 $ 134 Restricted stock 293 274 179 DSPP 29 32 32 $ 397 $ 405 $ 345 At December 31, 2020, there was $335 million of total unrecognized compensation cost related to nonvested stock-based compensation arrangements, of which $198 million is expected to be recognized in 2021, $102 million in 2022, $26 million in 2023, and $9 million in 2024. As of December 31, 2020, approximately 16 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, 2020
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes Schlumberger operates in more than 100 tax jurisdictions, where statutory tax rates generally vary from 0% to 35%. Income (loss) before taxes subject to United States and non-United States income taxes was as follows: (Stated in millions) 2020 2019 2018 United States $ (4,394 ) $ (8,991 ) $ (55 ) Outside United States (6,904 ) (1,427 ) 2,679 $ (11,298 ) $ (10,418 ) $ 2,624 Schlumberger recorded net pretax charges of $12.515 billion in 2020 ($3.961 billion in the US and $8.554 billion outside the US); $12.901 billion in 2019 ($8.769 billion in the US and $4.132 billion outside the US); and $141 million in 2018 ($102 million in the US and $39 million 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) 2020 2019 Intangible assets $ (881 ) $ (1,790 ) Net operating losses 421 144 Fixed assets, net 151 434 Inventories 59 155 Investments in non-US subsidiaries (171 ) (220 ) Foreign tax credits - 312 Other, net 402 474 $ (19 ) $ (491 ) The deferred tax balances at December 31, 2020 and 2019 were net of valuation allowances relating to net operating losses in certain countries of $127 million and $82 million, respectively. Additionally, the deferred tax balances at December 31, 2020 were net of valuation allowances relating to foreign tax credits and capital losses of $106 million and $54 million, respectively. Approximately $353 million of the $421 million deferred tax asset relating to net operating losses at December 31, 2020 can be carried forward indefinitely. The vast majority of the remaining balance expires at various dates between 2030 and 2040. Schlumberger generally does not provide for taxes related to the undistributed earnings of its subsidiaries because such earnings either would not be taxable when remitted or they are considered to be indefinitely reinvested. The components of Tax expense (benefit) (Stated in millions) 2020 2019 2018 Current: United States-Federal $ 21 $ (81 ) $ 124 United States-State 5 11 (50 ) Outside United States 410 770 618 436 700 692 Deferred: United States-Federal $ (824 ) $ (660 ) $ (143 ) United States-State (67 ) (93 ) (4 ) Outside United States (563 ) (257 ) (69 ) Valuation allowance 206 (1 ) (29 ) (1,248 ) (1,011 ) (245 ) $ (812 ) $ (311 ) $ 447 A reconciliation of the United States statutory federal tax rate to the consolidated effective tax rate follows: 2020 2019 2018 US federal statutory rate 21 % 21 % 21 % State tax - - (2 ) Non-US income taxed at different rates - - (2 ) Charges and credits (See Note 3) (14 ) (19 ) - Other - 1 - 7 % 3 % 17 % 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, 2020, 2019 and 2018 is as follows: (Stated in millions) 2020 2019 2018 Balance at beginning of year $ 1,301 $ 1,433 $ 1,393 Additions based on tax positions related to the current year 76 86 88 Additions for tax positions of prior years 78 65 145 Impact of changes in exchange rates (3 ) 2 (41 ) Settlements with tax authorities (15 ) (50 ) (22 ) Reductions for tax positions of prior years (87 ) (176 ) (57 ) Reductions due to the lapse of the applicable statute of limitations (79 ) (59 ) (73 ) $ 1,271 $ 1,301 $ 1,433 The amounts above exclude accrued interest and penalties of $184 million, $188 million and $205 million at December 31, 2020, 2019 and 2018, 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: Canada 2013 - 2020 Ecuador 2016 - 2020 Mexico 2012 - 2020 Norway 2015 - 2020 Russia 2016 - 2020 Saudi Arabia 2015 - 2020 United Kingdom 2017 - 2020 United States 2017 - 2020 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, 2020
Leases [Abstract]
Leases and Lease Commitments	14. Leases and Lease Commitments Schlumberger’s leasing activities primarily consist of operating leases for administrative offices, manufacturing facilities, research centers, service centers, sales offices and certain equipment. Total operating lease expense, which approximates cash paid and includes short-term leases, was $1.4 billion in 2020 and $1.7 billion in each of 2019 and 2018. Maturities of operating lease liabilities as of December 31, 2020 were as follows: (Stated in millions) 2021 $ 256 2022 200 2023 160 2024 128 2025 92 Thereafter 318 Total lease payments $ 1,154 Less: Interest (143 ) $ 1,011 Amounts recognized in balance sheet Accounts payable and accrued liabilities $ 248 Other Liabilities 763 $ 1,011 Operating lease assets of $0.8 billion and $1.3 billion as of December 31, 2020 and 2019, respectively, were included in Other Assets Consolidated Balance Sheet Accounts payable and accrued liabilities Other Liabilities Consolidated Balance Sheet. The weighted-average remaining lease term as of December 31, 2020 was 8 years. The weighted-average discount rate used to determine the operating lease liability as of December 31, 2020 was 3.2%.

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2020
Commitments And Contingencies Disclosure [Abstract]
Contingencies	15. Contingencies Schlumberger is 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, 2020
Segment Reporting [Abstract]
Segment Information	16. Segment Information During 2020, Schlumberger restructured its organization in order to prepare for a changing industry future. This new structure is aligned with customer workflows and is directly linked to Schlumberger’s corporate strategy, a key element of which is customer collaboration. The new organization consists of four Divisions that combine and integrate Schlumberger’s technologies, enhancing the portfolio of capabilities that support the emerging long-term growth opportunities in each of these market segments. The four Divisions, representing Schlumberger’s segments, are: • Digital & Integration – Combines Schlumberger’s software and seismic businesses with its integrated offering of Asset Performance Solutions. • Reservoir Performance – Consists of reservoir-centric technologies and services that are critical to optimizing reservoir productivity and performance. • Well Construction – Combines the full portfolio of products and services to optimize well placement and performance, maximize drilling efficiency, and improve wellbore assurance. • Production Systems – Develops technologies and provides expertise that enhance production and recovery from subsurface reservoirs to the surface, into pipelines, and to refineries. Financial information for the years ended December 31, 2020, 2019 and 2018, by segment, is as follows: (Stated in millions) 2020 Depreciation Income (Loss) and Capital Revenue Before Taxes Assets Amortization Investments Digital & Integration $ 3,076 $ 731 $ 3,595 $ 615 $ 413 Reservoir Performance 5,602 353 3,489 549 384 Well Construction 8,605 866 4,768 580 420 Production Systems 6,650 623 4,665 338 240 Eliminations & other (332 ) (172 ) 940 276 63 2,401 Goodwill and intangible assets 16,436 Cash and short-term investments 3,006 All other assets 5,535 Corporate & other (1) (681 ) 208 Interest income (2) 31 Interest expense (3) (534 ) Charges & credits (4) (12,515 ) $ 23,601 $ (11,298 ) $ 42,434 $ 2,566 $ 1,520 (Stated in millions) 2019 Depreciation Income (Loss) and Capital Revenue Before Taxes Assets Amortization Investments Digital & Integration $ 4,145 $ 882 $ 6,388 $ 1,069 $ 1,020 Reservoir Performance 9,299 992 5,198 807 569 Well Construction 11,880 1,429 6,913 656 650 Production Systems 8,167 847 5,625 390 384 Eliminations & other (574 ) (172 ) 1,314 250 113 3,978 Goodwill and intangible assets 23,130 Cash and short-term investments 2,167 All other assets 5,577 Corporate & other (1) (957 ) 417 Interest income (2) 33 Interest expense (3) (571 ) Charges & credits (4) (12,901 ) $ 32,917 $ (10,418 ) $ 56,312 $ 3,589 $ 2,736 (Stated in millions) 2018 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Investments Digital & Integration $ 3,820 $ 882 $ 6,784 $ 894 $ 1,091 Reservoir Performance 10,050 1,169 7,396 850 899 Well Construction 11,310 1,465 7,112 713 769 Production Systems 8,168 843 5,632 423 343 Eliminations & other (533 ) (172 ) 1,448 237 139 4,187 Goodwill and intangible assets 33,658 Cash and short-term investments 2,777 All other assets 5,700 Corporate & other (1) (937 ) 439 Interest income (2) 52 Interest expense (3) (537 ) Charges & credits (4) (141 ) $ 32,815 $ 2,624 $ 70,507 $ 3,556 $ 3,241 (1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. (2) Interest income excludes amounts which are included in the segments’ income (2020: $2 million; 2019: $8 million; 2018: $8 million). (3) Interest expense excludes amounts which are included in the segments’ income (2020: $28 million; 2019: $38 million; 2018: $38 million). (4) See Note 3 – Charges and Credits . Segment assets consist of receivables, inventories, fixed assets, multiclient seismic data and APS investments. Capital investments includes capital expenditures, APS investments and multiclient seismic data cost capitalized. Depreciation and amortization includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and APS investments . Revenue by geographic area for the years ended December 31, 2020, 2019 and 2018 is as follows: (Stated in millions) 2020 2019 2018 North America $ 5,478 $ 10,446 $ 11,730 Latin America 3,472 4,544 4,013 Europe/CIS/Africa 5,963 7,682 7,113 Middle East & Asia 8,567 10,016 9,582 Eliminations & other 121 229 377 $ 23,601 $ 32,917 $ 32,815 Revenue is based on the location where services are provided and products are sold. During each of the three years ended December 31, 2020, 2019 and 2018, 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 2020, 2019 and 2018 was $4.5 billion, $9.3 billion and $10.1 billion, respectively. North America and International revenue disaggregated by segment was as follows: (Stated in millions) 2020 North America International Eliminations & other Total Digital & Integration $ 573 $ 2,496 $ 7 $ 3,076 Reservoir Performance 1,547 4,043 12 5,602 Well Construction 1,453 6,956 196 8,605 Production Systems 1,921 4,702 27 6,650 Eliminations & other (16 ) (195 ) (121 ) (332 ) $ 5,478 $ 18,002 $ 121 $ 23,601 (Stated in millions) 2019 North America International Eliminations & other Total Digital & Integration $ 865 $ 3,272 $ 8 $ 4,145 Reservoir Performance 3,779 5,509 11 9,299 Well Construction 2,814 8,809 257 11,880 Production Systems 3,053 5,059 55 8,167 Eliminations & other (65 ) (407 ) (102 ) (574 ) $ 10,446 $ 22,242 $ 229 $ 32,917 (Stated in millions) 2018 North America International Eliminations & other Total Digital & Integration $ 786 $ 2,894 $ 140 $ 3,820 Reservoir Performance 4,975 5,066 9 10,050 Well Construction 2,911 8,083 316 11,310 Production Systems 3,139 4,966 63 8,168 Eliminations & other (81 ) (301 ) (151 ) (533 ) $ 11,730 $ 20,708 $ 377 $ 32,815 Fixed Assets less accumulated depreciation by geographic area are as follows: (Stated in millions) 2020 2019 North America $ 1,588 $ 3,326 Latin America 841 912 Europe/CIS/Africa 1,840 2,309 Middle East & Asia 2,353 2,502 Unallocated 204 221 $ 6,826 $ 9,270

Pension and Other Benefit Plans

Pension and Other Benefit Plans	12 Months Ended
	Dec. 31, 2020
Compensation And Retirement Disclosure [Abstract]
Pension and Other Benefit Plans	17. 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 2020 2019 2018 2020 2019 2018 Discount rate 3.30 % 4.30 % 3.70 % 3.27 % 4.00 % 3.55 % Compensation increases 4.00 % 4.00 % 4.00 % 4.82 % 4.83 % 4.81 % Return on plan assets 6.60 % 6.60 % 7.25 % 6.71 % 7.22 % 7.40 % Net pension cost (credit) for 2020, 2019 and 2018 included the following components: (Stated in millions) US International 2020 2019 2018 2020 2019 2018 Service cost - benefits earned during the period $ 55 $ 49 $ 59 $ 140 $ 112 $ 138 Interest cost on projected benefit obligation 148 180 167 301 333 304 Expected return on plan assets (233 ) (232 ) (248 ) (591 ) (592 ) (584 ) Amortization of prior service cost 8 10 13 - 7 10 Amortization of net loss 41 29 47 159 70 140 Settlement charge - 37 - - - - $ 19 $ 73 $ 38 $ 9 $ (70 ) $ 8 Certain of Schlumberger’s deferred benefit pension plans offered former Schlumberger employees, who had not yet commenced receiving their pension benefits, an opportunity to receive a lump sum payout of their vested pension benefit. Schlumberger’s pension plans paid $257 million from pension plan assets to those who accepted this offer, thereby reducing its pension benefit obligations. These transactions resulted in a non-cash pension settlement charge of $37 million, representing the immediate recognition of the related deferred actuarial losses in Accumulated Other Comprehensive Loss Charges and Credits 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 2020 2019 2020 2019 Discount rate 2.60 % 3.30 % 2.38 % 3.27 % Compensation increases 4.00 % 4.00 % 4.82 % 4.83 % The changes in the projected benefit obligation, plan assets and funded status of the plans were as follows: (Stated in millions) US International 2020 2019 2020 2019 Change in Projected Benefit Obligations Projected benefit obligation at beginning of year $ 4,593 $ 4,278 $ 9,647 $ 8,111 Service cost 55 49 140 112 Interest cost 148 180 301 333 Contribution by plan participants - - 94 63 Actuarial losses 370 535 1,233 1,304 Currency effect - - 68 50 Settlement - (240 ) (5 ) (17 ) Benefits paid (226 ) (209 ) (338 ) (309 ) Projected benefit obligation at end of year $ 4,940 $ 4,593 $ 11,140 $ 9,647 Change in Plan Assets Plan assets at fair value at beginning of year $ 4,236 $ 3,748 $ 9,363 $ 7,872 Actual return on plan assets 760 931 1,282 1,676 Currency effect - - 72 59 Company contributions 6 6 20 19 Contributions by plan participants - - 94 63 Settlement - (240 ) - (17 ) Benefits paid (226 ) (209 ) (338 ) (309 ) Plan assets at fair value at end of year $ 4,776 $ 4,236 $ 10,493 $ 9,363 Unfunded Liability $ (164 ) $ (357 ) $ (647 ) $ (284 ) Amounts Recognized in Balance Sheet Postretirement Benefits $ (199 ) $ (357 ) $ (849 ) $ (602 ) Other Assets 35 - 202 318 $ (164 ) $ (357 ) $ (647 ) $ (284 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses $ 423 $ 622 $ 1,981 $ 1,638 Prior service cost 1 9 - - $ 424 $ 631 $ 1,981 $ 1,638 Accumulated benefit obligation $ 4,739 $ 4,345 $ 10,844 $ 9,376 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 (“ABO”) represents the actuarial present value of benefits based on employee service and compensation but does not include an assumption about future compensation levels. Actuarial losses arising during 2020 and 2019 were primarily attributable to decreases in the discount rate used to determine the PBO. As of December 31, 2020, the PBO and fair value of plan assets for plans with PBOs in excess of plan assets were $9.4 billion and $8.3 billion, respectively. The related ABO for these plans was $9.1 billion at December 31, 2020. The weighted-average allocation of plan assets and the target allocations by asset category are as follows: US International Target 2020 2019 Target 2020 2019 Equity securities 11 - 20 % 15 % 22 % 40 - 54 % 43 % 50 Debt securities 70 - 83 76 70 28 - 43 36 31 Cash and cash equivalents 0 - 3 3 2 0 - 5 4 4 Alternative investments 5 - 10 6 6 15 - 22 17 15 100 % 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 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, 2020 and 2019, 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 2020 2019 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 140 $ 127 $ 13 $ - $ 73 $ 59 $ 14 $ - Equity Securities: US (a) 527 441 86 - 605 500 105 - International (b) 186 182 4 - 320 315 5 - Debt Securities Corporate bonds (c) 1,945 - 1,945 - 1,687 - 1,687 - Government and government-related debt securities (d) 1,658 180 1,478 - 1,256 74 1,182 - Collateralized mortgage obligations and mortgage backed securities (e) 21 - 21 - 21 - 21 - Alternative Investments: Private equity (f) 204 - - 204 181 - - 181 Real estate (g) 95 - - 95 93 - - 93 Total $ 4,776 $ 930 $ 3,547 $ 299 $ 4,236 $ 948 $ 3,014 $ 274 (Stated in millions) International Plan Assets 2020 2019 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 457 $ 215 $ 242 $ - $ 351 $ 166 $ 185 $ - Equity Securities: US (a) 2,797 2,393 404 - 2,834 2,347 487 - International (b) 1,711 1,615 96 - 1,871 1,723 148 - Debt Securities Corporate bonds (c) 1,260 - 1,260 - 1,105 - 1,105 - Government and government-related debt securities (d) 2,405 213 2,192 - 1,602 5 1,597 - Collateralized mortgage obligations and mortgage backed securities (e) 122 - 122 - 161 - 161 - Alternative Investments: Private equity (f) 851 - - 851 623 - - 623 Real estate (g) 200 - - 200 183 - - 183 Other 690 - - 690 633 - - 633 Total $ 10,493 $ 4,436 $ 4,316 $ 1,741 $ 9,363 $ 4,241 $ 3,683 $ 1,439 (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 $20 million to its postretirement benefit plans in 2021, 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 2020 2019 2020 2019 2018 Discount rate 2.60 % 3.30 % 3.30 % 4.30 % 3.70 % Return on plan assets - - 7.00 % 7.00 % 7.00 % Current medical cost trend rate 7.25 % 7.50 % 7.25 % 7.50 % 7.00 % Ultimate medical cost trend rate 4.50 % 4.50 % 4.50 % 4.50 % 5.00 % Year that the rate reaches the ultimate trend rate 2031 2031 2031 2031 2026 The net periodic benefit credit for the US postretirement medical plan included the following components: (Stated in millions) 2020 2019 2018 Service cost $ 31 $ 29 $ 32 Interest cost 36 45 43 Expected return on plan assets (70 ) (64 ) (63 ) Amortization of prior service credit (25 ) (28 ) (28 ) Curtailment gain (69 ) - - $ (97 ) $ (18 ) $ (16 ) Due to the actions taken by Schlumberger to reduce its global workforce during 2020, Schlumberger experienced a significant reduction in the expected aggregate years of future service of its employees in its US postretirement medical plan. Accordingly, Schlumberger recorded a curtailment gain of $69 million during the second quarter of 2020 relating to this plan. The curtailment gain includes recognition of the decrease in the benefit obligation as well as a portion of the previously unrecognized prior service credit, reflecting the reduction in expected years of future service. As a result of the curtailment, Schlumberger performed a remeasurement of the plan, which had an immaterial impact. This gain was classified in Impairments & other Consolidated Statement of Loss Charges and Credits The changes in the accumulated postretirement benefit obligation, plan assets and funded status were as follows: (Stated in millions) 2020 2019 Change in Projected Benefit Obligations Benefit obligation at beginning of year $ 1,193 $ 1,106 Service cost 31 29 Interest cost 36 45 Contribution by plan participants 8 8 Actuarial (gains) losses 64 65 Benefits paid (58 ) (60 ) Curtailment (40 ) - Benefit obligation at end of year $ 1,234 $ 1,193 Change in Plan Assets Plan assets at fair value at beginning of year $ 1,185 $ 997 Actual return on plan assets 221 240 Contributions by plan participants 8 8 Benefits paid (58 ) (60 ) Plan assets at fair value at end of year $ 1,356 $ 1,185 Asset (Unfunded Liability) $ 122 $ (8 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial (gains) losses $ (186 ) $ (98 ) Prior service credit (104 ) (158 ) $ (290 ) $ (256 ) The $122 million asset relating to this plan at December 31, 2020 was included in Other Assets Postretirement Benefits Consolidated Balance Sheet The assets of the US postretirement medical plan are invested 61% in equity securities and 39% in debt securities at December 31, 2020. The fair value of these assets was primarily determined based on Level Two valuation techniques. 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 2021 $ 235 $ 349 $ 56 2022 $ 235 $ 359 $ 56 2023 $ 236 $ 370 $ 56 2024 $ 237 $ 381 $ 56 2025 $ 237 $ 385 $ 57 2026-2030 $ 1,193 $ 2,146 $ 297

Supplementary Information

Supplementary Information	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Supplementary Information	18. Supplementary Information Cash paid for interest and income taxes was as follows: (Stated in millions) 2020 2019 2018 Interest $ 598 $ 558 $ 592 Income tax $ 582 $ 739 $ 628 Interest and other income includes the following: (Stated in millions) 2020 2019 2018 Earnings of equity method investments $ 91 $ 45 $ 89 Interest income 33 41 60 Unrealized gain on marketable securities (see Note 3) 39 - - $ 163 $ 86 $ 149 The change in Allowance for doubtful accounts (Stated in millions) 2020 2019 2018 Balance at beginning of year $ 255 $ 249 $ 241 Additions 58 5 15 Amounts written off (12 ) 1 (7 ) Balance at end of year $ 301 $ 255 $ 249 Revenue in excess of billings related to contracts where revenue is recognized over time was $0.2 billion at both December 31, 2020 and 2019. Such amounts are included within Receivables less allowance for doubtful accounts Consolidated Balance Sheet Accounts payable and accrued liabilities consist of the following: (Stated in millions) 2020 2019 Trade $ 2,937 $ 4,790 Payroll, vacation and employee benefits 1,524 1,445 Billings and cash collections in excess of revenue 941 910 Other 3,040 3,518 $ 8,442 $ 10,663

Summary of Accounting Policies

Summary of Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2020
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, the 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 for certain long-term construction-type contracts over time; recoverability of fixed assets, goodwill, intangible assets, Asset Performance Solutions 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 adopted Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers Consolidated Financial Statements Schlumberger recognizes revenue upon the transfer of control of promised products or services to customers at an amount that reflects the consideration it expects to receive in exchange for these products or services. The vast majority of Schlumberger’s services and product offerings are short-term in nature. The time between invoicing and when payment is due under these arrangements is generally between 30 to 60 days. Revenue is occasionally generated from contractual arrangements that include multiple performance obligations. Revenue from these arrangements is allocated to each performance obligation based on its relative standalone selling price. Standalone selling prices are generally determined based on the prices charged to customers or using expected costs plus margin. Revenue is recognized for certain long-term construction-type contracts over time. These contracts involve significant design and engineering efforts in order to satisfy custom designs for customer-specific applications. Revenue is recognized as work progresses on each contract. Progress is measured by the ratio of actual costs incurred to date on the project in relation to total estimated project costs. The estimate of total project costs has a significant impact on both the amount of revenue recognized as well as the related profit on a project. Revenue and profits on contracts can also be significantly affected by change orders and claims. Due to the nature of these projects, adjustments to estimates of contract revenue and total contract costs may be required as work progresses. Progress billings are generally issued upon completion of certain phases of work as stipulated in the contract. Any expected losses on a project are recorded in full in the period in which they become probable. Due to the nature of its businesses, Schlumberger does not have significant backlog. Total backlog was $2.6 billion at December 31, 2020, of which approximately 60% is expected to be recognized as revenue during 2021.
Short-term and Investments	Short-term Investments Short-term investments are comprised primarily of money market funds, time deposits, certificates of deposit, commercial paper, bonds and notes, substantially all of which are denominated in US dollars and are stated at cost plus accrued interest, which approximates fair value. 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 Interest and other income
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.
Asset Performance Solutions	Asset Performance Solutions Asset Performance Solutions (“APS”) projects are focused on developing and co-managing production of customers’ assets under long-term agreements. Schlumberger invests its own services and products, and in certain historical 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 generally compensated based on cash flow generated or on a fee-per-barrel basis. This includes certain arrangements whereby Schlumberger is only compensated based on incremental production it helps deliver above a mutually agreed baseline. Schlumberger capitalizes its cash investments in a project as well as the direct costs associated with providing services or products for which Schlumberger will be compensated when the related production is achieved. These capitalized investments are amortized to the Consolidated Statement of Income (Loss) The unamortized portion of Schlumberger’s investments in APS projects was $1.713 billion and $3.724 billion at December 31, 2020 and 2019, 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, receivables from clients and derivative financial instruments. Schlumberger places its cash and short-term investments 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 generates revenue in more than 120 countries and as such, its accounts receivable are spread over many countries and customers. Mexico represented approximately 14% of Schlumberger’s net accounts receivable balance at December 31, 2020. No other country accounted for greater than 10% of Schlumberger’s accounts receivable balance. Schlumberger maintains an allowance for uncollectible accounts receivable based on expected collectability and performs ongoing credit evaluations of its customers’ financial condition. If the financial condition of Schlumberger’s customers were to deteriorate resulting in an impairment of their ability to make payments, adjustments to the allowance may be required.
Earnings per Share	Earnings per Share The following is a reconciliation from basic to diluted earnings (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 2020: Basic $ (10,518 ) 1,390 $ (7.57 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (10,518 ) 1,390 $ (7.57 ) 2019: Basic $ (10,137 ) 1,385 $ (7.32 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (10,137 ) 1,385 $ (7.32 ) 2018: Basic $ 2,138 1,385 $ 1.54 Assumed exercise of stock options - - Unvested restricted stock - 8 Diluted $ 2,138 1,393 $ 1.53 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) 2020 2019 2018 Employee stock options 48 46 40 Unvested restricted stock 19 12 -
Reclassifications	Reclassifications Certain prior period amounts have been reclassified to conform to the current period presentation.

Summary of Accounting Policie_2

Summary of Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2020
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 2020: Basic $ (10,518 ) 1,390 $ (7.57 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (10,518 ) 1,390 $ (7.57 ) 2019: Basic $ (10,137 ) 1,385 $ (7.32 ) Assumed exercise of stock options - - Unvested restricted stock - - Diluted $ (10,137 ) 1,385 $ (7.32 ) 2018: Basic $ 2,138 1,385 $ 1.54 Assumed exercise of stock options - - Unvested restricted stock - 8 Diluted $ 2,138 1,393 $ 1.53
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) 2020 2019 2018 Employee stock options 48 46 40 Unvested restricted stock 19 12 -

Charges and Credits (Tables)

Charges and Credits (Tables)	12 Months Ended
	Dec. 31, 2020
Restructuring And Related Activities [Abstract]
Summary of Charges and Credits	Schlumberger recorded the following charges and credits during 2020, all of which, unless otherwise noted, are classified in Impairments & other Consolidated Statement of Income (Loss) (Stated in millions) Pretax Tax Net First quarter: Goodwill $ 3,070 $ - $ 3,070 Intangible assets impairments 3,321 815 2,506 Asset Performance Solutions investments 1,264 (4 ) 1,268 North America pressure pumping impairment 587 133 454 Workforce reductions 202 7 195 Other 79 9 70 Valuation allowance - (164 ) 164 Second quarter: Workforce reductions 1,021 71 950 Asset Performance Solutions investments 730 15 715 Fixed asset impairments 666 52 614 Inventory write-downs 603 49 554 Right-of-use asset impairments 311 67 244 Costs associated with exiting certain activities 205 (25 ) 230 Multiclient seismic data impairment 156 2 154 Repurchase of bonds 40 2 38 Postretirement benefits curtailment gain (69 ) (16 ) (53 ) Other 60 4 56 Third quarter: Facility exit charges 254 39 215 Workforce reductions 63 - 63 Other 33 1 32 Fourth quarter: Gain on sale of OneStim (104 ) (11 ) (93 ) Unrealized gain on marketable securities (39 ) (9 ) (30 ) Other 62 4 58 $ 12,515 $ 1,041 $ 11,474 Schlumberger recorded the following charges and credits during 2019, all of which are classified as Impairments & other Consolidated Statement of Income (Loss) (Stated in millions) Pretax Tax Net Third quarter: Goodwill impairment $ 8,828 $ 43 $ 8,785 Intangible assets impairment 1,085 248 837 North America pressure pumping 1,575 344 1,231 Other North America-related 310 53 257 Argentina 127 - 127 Equity-method investments 231 12 219 Asset Performance Solutions investments 294 - 294 Other 242 13 229 Fourth quarter: North America restructuring 225 51 174 Other restructuring 104 (33 ) 137 Workforce reductions 68 8 60 Pension settlement accounting 37 8 29 Repurchase of bonds 22 5 17 Gain on formation of Sensia joint venture (247 ) (42 ) (205 ) $ 12,901 $ 710 $ 12,191 During 2018, Schlumberger recorded the following charges and credits: (Stated in millions) Pretax Tax Net Gain on sale of marine seismic acquisition business $ (215 ) $ (19 ) $ (196 ) Workforce reductions 184 20 164 Asset impairments 172 16 156 $ 141 $ 17 $ 124

Inventories (Tables)

Inventories (Tables)	12 Months Ended
	Dec. 31, 2020
Inventory Disclosure [Abstract]
Summary of Inventory	Inventories, which are stated at the lower of average cost or net realizable value, consist of the following: (Stated in millions) 2020 2019 Raw materials & field materials $ 1,573 $ 1,857 Work in progress 464 515 Finished goods 1,317 1,758 $ 3,354 $ 4,130

Fixed Assets (Tables)

Fixed Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Property Plant And Equipment [Abstract]
Summary of Fixed Assets	Fixed assets consist of the following: (Stated in millions) 2020 2019 Land $ 362 $ 483 Buildings & improvements 3,757 5,156 Machinery & equipment 25,625 29,370 29,744 35,009 Less: Accumulated depreciation 22,918 25,739 $ 6,826 $ 9,270

Multiclient Seismic Data (Table

Multiclient Seismic Data (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 Balance at beginning of year $ 568 $ 601 Capitalized in period 101 231 Charged to expense (174 ) (264 ) Impairment charge (see Note 3) (156 ) - Other (22 ) - $ 317 $ 568

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill by segment were as follows: (Stated in millions) Reservoir Characterization Drilling Production Cameron Total Balance, January 1, 2019 $ 4,703 $ 10,111 $ 4,678 $ 5,439 $ 24,931 Impairment (see Note 3) (97 ) (3,025 ) (705 ) (5,001 ) (8,828 ) Impact of changes in exchange rates and other (46 ) 6 (24 ) 3 (61 ) Balance, December 31, 2019 4,560 7,092 3,949 441 16,042 Impairment (see Note 3) - (1,659 ) (1,228 ) (183 ) (3,070 ) Impact of changes in exchange rates and other - 10 (17 ) 3 (4 ) Balance, September 30, 2020 $ 4,560 $ 5,443 $ 2,704 $ 261 $ 12,968 In connection with the change in reportable segments discussed in Note 16 – Segment Information (Stated in millions) Digital & Reservoir Well Production Integration Performance Construction Systems Total Balance, October 1, 2020 $ 2,041 $ 3,806 $ 6,267 $ 854 $ 12,968 Impact of changes in exchange rates and other 6 (4 ) 11 (1 ) 12 Balance, December 31, 2020 $ 2,047 $ 3,802 $ 6,278 $ 853 $ 12,980

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets by Major Class	Intangible assets consist of the following: (Stated in millions) 2020 2019 Gross Accumulated Net Book Gross Accumulated Net Book Book Amortization Value Book Value Amortization Value Customer Relationships $ 1,744 $ 485 $ 1,259 $ 3,779 $ 868 $ 2,911 Technology/Technical Know-How 1,284 488 796 2,498 779 1,719 Tradenames 767 166 601 1,885 264 1,621 Other 1,488 689 799 1,514 676 838 $ 5,283 $ 1,828 $ 3,455 $ 9,676 $ 2,587 $ 7,089

Long-term Debt and Debt Facil_2

Long-term Debt and Debt Facility Agreements (Tables)	12 Months Ended
	Dec. 31, 2020
Debt Disclosure [Abstract]
Summary of Long-term Debt	Long-term Debt consists of the following: (Stated in millions) 2020 2019 3.65% Senior Notes due 2023 $ 1,496 $ 1,495 3.90% Senior Notes due 2028 1,450 1,444 2.65% Senior Notes due 2030 1,250 - 1.375% Guaranteed Notes due 2026 1,221 - 2.00% Guaranteed Notes due 2032 1,214 - 0.25% Notes due 2027 1,100 550 0.50% Notes due 2031 1,099 544 2.40% Senior Notes due 2022 999 998 4.00% Senior Notes due 2025 930 929 4.30% Senior Notes due 2029 846 845 3.75% Senior Notes due 2024 746 746 1.00% Guaranteed Notes due 2026 736 665 0.00% Notes due 2024 611 551 2.65% Senior Notes due 2022 598 598 1.40% Senior Notes due 2025 498 - 3.63% Senior Notes due 2022 295 294 7.00% Notes due 2038 206 208 5.95% Notes due 2041 114 114 5.13% Notes due 2043 99 99 4.00% Notes due 2023 80 81 3.70% Notes due 2024 55 55 3.30% Senior Notes due 2021 - 1,597 4.20% Senior Notes due 2021 - 600 Commercial paper borrowings 393 2,222 Other - 135 $ 16,036 $ 14,770

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2020
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 hedges and those not designated as hedges on the Consolidated Statement of Income (Loss) (Stated in millions) Gain (Loss) Recognized in Income (Loss) Consolidated Statement 2020 2019 2018 of Income (Loss) Classification Derivatives designated as cash flow hedges: Cross currency swap $ 493 $ (35 ) $ 55 Cost of services/sales Foreign exchange contracts (5 ) (10 ) (1 ) Cost of services/sales $ 488 $ (45 ) $ 54 Derivatives not designated as hedges: Foreign exchange contracts $ (29 ) $ (5 ) $ 40 Cost of services/sales

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2020
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, 2018 $ (2,139 ) $ 13 $ 3 $ (2,151 ) $ (4,274 ) Reclassification to Retained Earnings - - - (109 ) (109 ) Other comprehensive loss before reclassifications (191 ) (11 ) (16 ) (186 ) (404 ) Amounts reclassified from accumulated other comprehensive loss - - 1 182 183 Income taxes - - - (18 ) (18 ) Balance, December 31, 2018 (2,330 ) 2 (12 ) (2,282 ) (4,622 ) Other comprehensive loss before reclassifications 67 - (32 ) 127 162 Amounts reclassified from accumulated other comprehensive loss - - 10 83 93 Income taxes - - - (71 ) (71 ) Balance, December 31, 2019 (2,263 ) 2 (34 ) (2,143 ) (4,438 ) Other comprehensive loss before reclassifications (239 ) - (90 ) (247 ) (576 ) Amounts reclassified from accumulated other comprehensive loss - - 54 114 168 Income taxes - - - (38 ) (38 ) Balance, December 31, 2020 $ (2,502 ) $ 2 $ (70 ) $ (2,314 ) $ (4,884 )

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2019
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: 2020 2019 2018 Dividend yield 5.2 % 4.8 % 2.6 % Expected volatility 26 % 25 % 26 % Risk-free interest rate 1.7 % 2.7 % 2.6 % Expected option life in years 7.0 7.0 7.0 Weighted-average fair value per share $ 5.07 $ 6.21 $ 17.37
Options Outstanding and Option Exercisable	The following table summarizes information related to options outstanding and options exercisable as of December 31, 2020: (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 $38.75 - $69.98 15,562 7.7 $ 44.48 3,846 $ 56.69 $70.31 - $76.74 9,462 2.1 $ 72.10 9,399 $ 72.06 $77.10 - $83.15 7,303 5.4 $ 79.29 5,425 $ 79.52 $83.89 - $88.77 8,549 3.0 $ 85.96 7,097 $ 85.66 $90.00 - $114.83 7,396 3.4 $ 95.79 7,396 $ 95.79 48,272 4.8 $ 70.37 33,163 $ 79.70
Summary of Stock Option Activity	The following table summarizes stock option activity during the years ended December 31, 2020, 2019 and 2018: (Shares stated in thousands) 2020 2019 2018 Weighted- Weighted- Weighted- Average Average Average Exercise Exercise Exercise Shares Price Shares Price Shares Price Outstanding at beginning of year 46,269 $ 75.65 43,529 $ 79.36 47,210 $ 79.13 Granted 7,468 $ 38.75 5,604 $ 41.50 2,121 $ 76.95 Exercised - $ - (1,045 ) $ 38.50 (936 ) $ 54.20 Forfeited (5,465 ) $ 71.86 (1,819 ) $ 74.69 (4,866 ) $ 84.19 Outstanding at year-end 48,272 $ 70.37 46,269 $ 75.65 43,529 $ 79.36
Restricted Stock Transactions	The following table summarizes information related to restricted stock transactions: (Shares stated in thousands) 2020 2019 2018 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 11,822 $ 49.86 6,951 $ 70.13 5,428 $ 72.33 Granted 10,637 $ 26.53 7,888 $ 35.56 3,204 $ 70.54 Vested (3,059 ) $ 71.56 (2,722 ) $ 72.09 (982 ) $ 77.62 Forfeited (637 ) $ 45.95 (295 ) $ 57.41 (699 ) $ 70.67 Unvested at year-end 18,763 $ 35.24 11,822 $ 49.86 6,951 $ 70.13
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: 2020 2019 2018 Dividend yield 4.0 % 5.3 % 2.9 % Expected volatility 43 % 30 % 22 % Risk-free interest rate 0.88 % 2.3 % 1.6 % Weighted-average fair value per share $ 5.38 $ 5.81 $ 9.01
Stock-Based Compensation Expense Recognized in Income	The following summarizes stock-based compensation expense recognized in income: (Stated in millions) 2020 2019 2018 Stock options $ 75 $ 99 $ 134 Restricted stock 293 274 179 DSPP 29 32 32 $ 397 $ 405 $ 345

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2020
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) 2020 2019 2018 United States $ (4,394 ) $ (8,991 ) $ (55 ) Outside United States (6,904 ) (1,427 ) 2,679 $ (11,298 ) $ (10,418 ) $ 2,624
Components of Net Deferred Tax Assets (Liabilities)	The components of net deferred tax assets (liabilities) were as follows: (Stated in millions) 2020 2019 Intangible assets $ (881 ) $ (1,790 ) Net operating losses 421 144 Fixed assets, net 151 434 Inventories 59 155 Investments in non-US subsidiaries (171 ) (220 ) Foreign tax credits - 312 Other, net 402 474 $ (19 ) $ (491 )
Components of Tax Expense (Benefit)	The components of Tax expense (benefit) (Stated in millions) 2020 2019 2018 Current: United States-Federal $ 21 $ (81 ) $ 124 United States-State 5 11 (50 ) Outside United States 410 770 618 436 700 692 Deferred: United States-Federal $ (824 ) $ (660 ) $ (143 ) United States-State (67 ) (93 ) (4 ) Outside United States (563 ) (257 ) (69 ) Valuation allowance 206 (1 ) (29 ) (1,248 ) (1,011 ) (245 ) $ (812 ) $ (311 ) $ 447
Reconciliation of US Statutory Federal Tax Rate	A reconciliation of the United States statutory federal tax rate to the consolidated effective tax rate follows: 2020 2019 2018 US federal statutory rate 21 % 21 % 21 % State tax - - (2 ) Non-US income taxed at different rates - - (2 ) Charges and credits (See Note 3) (14 ) (19 ) - Other - 1 - 7 % 3 % 17 %
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, 2020, 2019 and 2018 is as follows: (Stated in millions) 2020 2019 2018 Balance at beginning of year $ 1,301 $ 1,433 $ 1,393 Additions based on tax positions related to the current year 76 86 88 Additions for tax positions of prior years 78 65 145 Impact of changes in exchange rates (3 ) 2 (41 ) Settlements with tax authorities (15 ) (50 ) (22 ) Reductions for tax positions of prior years (87 ) (176 ) (57 ) Reductions due to the lapse of the applicable statute of limitations (79 ) (59 ) (73 ) $ 1,271 $ 1,301 $ 1,433
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: Canada 2013 - 2020 Ecuador 2016 - 2020 Mexico 2012 - 2020 Norway 2015 - 2020 Russia 2016 - 2020 Saudi Arabia 2015 - 2020 United Kingdom 2017 - 2020 United States 2017 - 2020

Leases and Lease Commitments (T

Leases and Lease Commitments (Tables)	12 Months Ended
	Dec. 31, 2020
Leases [Abstract]
Maturities of Operating Lease Liabilities	Maturities of operating lease liabilities as of December 31, 2020 were as follows: (Stated in millions) 2021 $ 256 2022 200 2023 160 2024 128 2025 92 Thereafter 318 Total lease payments $ 1,154 Less: Interest (143 ) $ 1,011 Amounts recognized in balance sheet Accounts payable and accrued liabilities $ 248 Other Liabilities 763 $ 1,011

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Financial information for the years ended December 31, 2020, 2019 and 2018, by segment, is as follows: (Stated in millions) 2020 Depreciation Income (Loss) and Capital Revenue Before Taxes Assets Amortization Investments Digital & Integration $ 3,076 $ 731 $ 3,595 $ 615 $ 413 Reservoir Performance 5,602 353 3,489 549 384 Well Construction 8,605 866 4,768 580 420 Production Systems 6,650 623 4,665 338 240 Eliminations & other (332 ) (172 ) 940 276 63 2,401 Goodwill and intangible assets 16,436 Cash and short-term investments 3,006 All other assets 5,535 Corporate & other (1) (681 ) 208 Interest income (2) 31 Interest expense (3) (534 ) Charges & credits (4) (12,515 ) $ 23,601 $ (11,298 ) $ 42,434 $ 2,566 $ 1,520 (Stated in millions) 2019 Depreciation Income (Loss) and Capital Revenue Before Taxes Assets Amortization Investments Digital & Integration $ 4,145 $ 882 $ 6,388 $ 1,069 $ 1,020 Reservoir Performance 9,299 992 5,198 807 569 Well Construction 11,880 1,429 6,913 656 650 Production Systems 8,167 847 5,625 390 384 Eliminations & other (574 ) (172 ) 1,314 250 113 3,978 Goodwill and intangible assets 23,130 Cash and short-term investments 2,167 All other assets 5,577 Corporate & other (1) (957 ) 417 Interest income (2) 33 Interest expense (3) (571 ) Charges & credits (4) (12,901 ) $ 32,917 $ (10,418 ) $ 56,312 $ 3,589 $ 2,736 (Stated in millions) 2018 Depreciation Income and Capital Revenue Before Taxes Assets Amortization Investments Digital & Integration $ 3,820 $ 882 $ 6,784 $ 894 $ 1,091 Reservoir Performance 10,050 1,169 7,396 850 899 Well Construction 11,310 1,465 7,112 713 769 Production Systems 8,168 843 5,632 423 343 Eliminations & other (533 ) (172 ) 1,448 237 139 4,187 Goodwill and intangible assets 33,658 Cash and short-term investments 2,777 All other assets 5,700 Corporate & other (1) (937 ) 439 Interest income (2) 52 Interest expense (3) (537 ) Charges & credits (4) (141 ) $ 32,815 $ 2,624 $ 70,507 $ 3,556 $ 3,241 (1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. (2) Interest income excludes amounts which are included in the segments’ income (2020: $2 million; 2019: $8 million; 2018: $8 million). (3) Interest expense excludes amounts which are included in the segments’ income (2020: $28 million; 2019: $38 million; 2018: $38 million). (4) See Note 3 – Charges and Credits .
Revenue by Geographic Area	Revenue by geographic area for the years ended December 31, 2020, 2019 and 2018 is as follows: (Stated in millions) 2020 2019 2018 North America $ 5,478 $ 10,446 $ 11,730 Latin America 3,472 4,544 4,013 Europe/CIS/Africa 5,963 7,682 7,113 Middle East & Asia 8,567 10,016 9,582 Eliminations & other 121 229 377 $ 23,601 $ 32,917 $ 32,815
Summary of North America and International Revenue Disaggregated by Segment	North America and International revenue disaggregated by segment was as follows: (Stated in millions) 2020 North America International Eliminations & other Total Digital & Integration $ 573 $ 2,496 $ 7 $ 3,076 Reservoir Performance 1,547 4,043 12 5,602 Well Construction 1,453 6,956 196 8,605 Production Systems 1,921 4,702 27 6,650 Eliminations & other (16 ) (195 ) (121 ) (332 ) $ 5,478 $ 18,002 $ 121 $ 23,601 (Stated in millions) 2019 North America International Eliminations & other Total Digital & Integration $ 865 $ 3,272 $ 8 $ 4,145 Reservoir Performance 3,779 5,509 11 9,299 Well Construction 2,814 8,809 257 11,880 Production Systems 3,053 5,059 55 8,167 Eliminations & other (65 ) (407 ) (102 ) (574 ) $ 10,446 $ 22,242 $ 229 $ 32,917 (Stated in millions) 2018 North America International Eliminations & other Total Digital & Integration $ 786 $ 2,894 $ 140 $ 3,820 Reservoir Performance 4,975 5,066 9 10,050 Well Construction 2,911 8,083 316 11,310 Production Systems 3,139 4,966 63 8,168 Eliminations & other (81 ) (301 ) (151 ) (533 ) $ 11,730 $ 20,708 $ 377 $ 32,815
Fixed Assets Less Accumulated Depreciation by Geographic Area	Fixed Assets less accumulated depreciation by geographic area are as follows: (Stated in millions) 2020 2019 North America $ 1,588 $ 3,326 Latin America 841 912 Europe/CIS/Africa 1,840 2,309 Middle East & Asia 2,353 2,502 Unallocated 204 221 $ 6,826 $ 9,270

Pension and Other Benefit Pla_2

Pension and Other Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2020
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 2020 2019 2018 2020 2019 2018 Discount rate 3.30 % 4.30 % 3.70 % 3.27 % 4.00 % 3.55 % Compensation increases 4.00 % 4.00 % 4.00 % 4.82 % 4.83 % 4.81 % Return on plan assets 6.60 % 6.60 % 7.25 % 6.71 % 7.22 % 7.40 %
Net Pension Cost (Credit) for Schlumberger Pension Plans and US Postretirement Medical Plan	Net pension cost (credit) for 2020, 2019 and 2018 included the following components: (Stated in millions) US International 2020 2019 2018 2020 2019 2018 Service cost - benefits earned during the period $ 55 $ 49 $ 59 $ 140 $ 112 $ 138 Interest cost on projected benefit obligation 148 180 167 301 333 304 Expected return on plan assets (233 ) (232 ) (248 ) (591 ) (592 ) (584 ) Amortization of prior service cost 8 10 13 - 7 10 Amortization of net loss 41 29 47 159 70 140 Settlement charge - 37 - - - - $ 19 $ 73 $ 38 $ 9 $ (70 ) $ 8 The net periodic benefit credit for the US postretirement medical plan included the following components: (Stated in millions) 2020 2019 2018 Service cost $ 31 $ 29 $ 32 Interest cost 36 45 43 Expected return on plan assets (70 ) (64 ) (63 ) Amortization of prior service credit (25 ) (28 ) (28 ) Curtailment gain (69 ) - - $ (97 ) $ (18 ) $ (16 )
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 2020 2019 2020 2019 Discount rate 2.60 % 3.30 % 2.38 % 3.27 % Compensation increases 4.00 % 4.00 % 4.82 % 4.83 %
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 2020 2019 2020 2019 Change in Projected Benefit Obligations Projected benefit obligation at beginning of year $ 4,593 $ 4,278 $ 9,647 $ 8,111 Service cost 55 49 140 112 Interest cost 148 180 301 333 Contribution by plan participants - - 94 63 Actuarial losses 370 535 1,233 1,304 Currency effect - - 68 50 Settlement - (240 ) (5 ) (17 ) Benefits paid (226 ) (209 ) (338 ) (309 ) Projected benefit obligation at end of year $ 4,940 $ 4,593 $ 11,140 $ 9,647 Change in Plan Assets Plan assets at fair value at beginning of year $ 4,236 $ 3,748 $ 9,363 $ 7,872 Actual return on plan assets 760 931 1,282 1,676 Currency effect - - 72 59 Company contributions 6 6 20 19 Contributions by plan participants - - 94 63 Settlement - (240 ) - (17 ) Benefits paid (226 ) (209 ) (338 ) (309 ) Plan assets at fair value at end of year $ 4,776 $ 4,236 $ 10,493 $ 9,363 Unfunded Liability $ (164 ) $ (357 ) $ (647 ) $ (284 ) Amounts Recognized in Balance Sheet Postretirement Benefits $ (199 ) $ (357 ) $ (849 ) $ (602 ) Other Assets 35 - 202 318 $ (164 ) $ (357 ) $ (647 ) $ (284 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial losses $ 423 $ 622 $ 1,981 $ 1,638 Prior service cost 1 9 - - $ 424 $ 631 $ 1,981 $ 1,638 Accumulated benefit obligation $ 4,739 $ 4,345 $ 10,844 $ 9,376
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 2020 2019 Target 2020 2019 Equity securities 11 - 20 % 15 % 22 % 40 - 54 % 43 % 50 Debt securities 70 - 83 76 70 28 - 43 36 31 Cash and cash equivalents 0 - 3 3 2 0 - 5 4 4 Alternative investments 5 - 10 6 6 15 - 22 17 15 100 % 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, 2020 and 2019, 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 2020 2019 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 140 $ 127 $ 13 $ - $ 73 $ 59 $ 14 $ - Equity Securities: US (a) 527 441 86 - 605 500 105 - International (b) 186 182 4 - 320 315 5 - Debt Securities Corporate bonds (c) 1,945 - 1,945 - 1,687 - 1,687 - Government and government-related debt securities (d) 1,658 180 1,478 - 1,256 74 1,182 - Collateralized mortgage obligations and mortgage backed securities (e) 21 - 21 - 21 - 21 - Alternative Investments: Private equity (f) 204 - - 204 181 - - 181 Real estate (g) 95 - - 95 93 - - 93 Total $ 4,776 $ 930 $ 3,547 $ 299 $ 4,236 $ 948 $ 3,014 $ 274 (Stated in millions) International Plan Assets 2020 2019 Level Level Level Level Level Level Total One Two Three Total One Two Three Asset Category: Cash and Cash Equivalents $ 457 $ 215 $ 242 $ - $ 351 $ 166 $ 185 $ - Equity Securities: US (a) 2,797 2,393 404 - 2,834 2,347 487 - International (b) 1,711 1,615 96 - 1,871 1,723 148 - Debt Securities Corporate bonds (c) 1,260 - 1,260 - 1,105 - 1,105 - Government and government-related debt securities (d) 2,405 213 2,192 - 1,602 5 1,597 - Collateralized mortgage obligations and mortgage backed securities (e) 122 - 122 - 161 - 161 - Alternative Investments: Private equity (f) 851 - - 851 623 - - 623 Real estate (g) 200 - - 200 183 - - 183 Other 690 - - 690 633 - - 633 Total $ 10,493 $ 4,436 $ 4,316 $ 1,741 $ 9,363 $ 4,241 $ 3,683 $ 1,439 (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 2020 2019 2020 2019 2018 Discount rate 2.60 % 3.30 % 3.30 % 4.30 % 3.70 % Return on plan assets - - 7.00 % 7.00 % 7.00 % Current medical cost trend rate 7.25 % 7.50 % 7.25 % 7.50 % 7.00 % Ultimate medical cost trend rate 4.50 % 4.50 % 4.50 % 4.50 % 5.00 % Year that the rate reaches the ultimate trend rate 2031 2031 2031 2031 2026
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) 2020 2019 Change in Projected Benefit Obligations Benefit obligation at beginning of year $ 1,193 $ 1,106 Service cost 31 29 Interest cost 36 45 Contribution by plan participants 8 8 Actuarial (gains) losses 64 65 Benefits paid (58 ) (60 ) Curtailment (40 ) - Benefit obligation at end of year $ 1,234 $ 1,193 Change in Plan Assets Plan assets at fair value at beginning of year $ 1,185 $ 997 Actual return on plan assets 221 240 Contributions by plan participants 8 8 Benefits paid (58 ) (60 ) Plan assets at fair value at end of year $ 1,356 $ 1,185 Asset (Unfunded Liability) $ 122 $ (8 ) Amounts Recognized in Accumulated Other Comprehensive Loss Actuarial (gains) losses $ (186 ) $ (98 ) Prior service credit (104 ) (158 ) $ (290 ) $ (256 )
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 2021 $ 235 $ 349 $ 56 2022 $ 235 $ 359 $ 56 2023 $ 236 $ 370 $ 56 2024 $ 237 $ 381 $ 56 2025 $ 237 $ 385 $ 57 2026-2030 $ 1,193 $ 2,146 $ 297

Supplementary Information (Tabl

Supplementary Information (Tables)	12 Months Ended
	Dec. 31, 2020
Segment Reporting [Abstract]
Cash Paid (Refunded) for Interest and Income Taxes	Cash paid for interest and income taxes was as follows: (Stated in millions) 2020 2019 2018 Interest $ 598 $ 558 $ 592 Income tax $ 582 $ 739 $ 628
Interest and Other Income	Interest and other income includes the following: (Stated in millions) 2020 2019 2018 Earnings of equity method investments $ 91 $ 45 $ 89 Interest income 33 41 60 Unrealized gain on marketable securities (see Note 3) 39 - - $ 163 $ 86 $ 149
Change in Allowance for Doubtful Accounts	The change in Allowance for doubtful accounts (Stated in millions) 2020 2019 2018 Balance at beginning of year $ 255 $ 249 $ 241 Additions 58 5 15 Amounts written off (12 ) 1 (7 ) Balance at end of year $ 301 $ 255 $ 249
Accounts Payable and Accrued Liabilities	Revenue in excess of billings related to contracts where revenue is recognized over time was $0.2 billion at both December 31, 2020 and 2019. Such amounts are included within Receivables less allowance for doubtful accounts Consolidated Balance Sheet Accounts payable and accrued liabilities consist of the following: (Stated in millions) 2020 2019 Trade $ 2,937 $ 4,790 Payroll, vacation and employee benefits 1,524 1,445 Billings and cash collections in excess of revenue 941 910 Other 3,040 3,518 $ 8,442 $ 10,663

Summary of Accounting Policie_3

Summary of Accounting Policies - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)Country	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]
Total backlog | $	$ 2,600
Percentage of revenue expected to be recognized over next 12 months	60.00%
Amortization expenses of capitalized investments | $	$ 396	$ 731	$ 568
Number of countries in which Schlumberger conducts business | Country	120
Number of reportable segments accounted for greater than 10% of accounts receivable | Country	0
Mexico | Customer Concentration Risk
Organization And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage	14.00%
Minimum
Organization And Summary Of Significant Accounting Policies [Line Items]
Revenue recognition period	30 days
Number of countries in which Schlumberger conducts business | Country	120
Maximum
Organization And Summary Of Significant Accounting Policies [Line Items]
Revenue recognition period	60 days
Asset Performance Solutions
Organization And Summary Of Significant Accounting Policies [Line Items]
Unamortized investments | $	$ 1,713	$ 3,724

Summary of Accounting Policie_4

Summary of Accounting Policies - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net Income (Loss) Attributable to Schlumberger
Basic	$ (10,518)	$ (10,137)	$ 2,138
Diluted	$ (10,518)	$ (10,137)	$ 2,138
Average Shares Outstanding
Basic	1,390	1,385	1,385
Unvested restricted stock			8
Diluted	1,390	1,385	1,393
Earnings (Loss) per Share
Basic	$ (7.57)	$ (7.32)	$ 1.54
Diluted	$ (7.57)	$ (7.32)	$ 1.53

Summary of Accounting Policie_5

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, 2020	Dec. 31, 2019	Dec. 31, 2018
Employee Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	48	46	40
Unvested Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	19	12

Charges and Credits - Summary o

Charges and Credits - Summary of Charges and Credits (Detail) - USD ($) $ in Millions	3 Months Ended						12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2018
Charges And Credits [Line Items]
Charges and credits, Pretax					$ 12,901			$ 141
Charges and credits, Tax					710			17
Charges and credits, Net					12,191			124
Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax							$ 12,515
Charges and credits, Tax							1,041
Charges and credits, Net							$ 11,474
Goodwill | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax				$ 3,070
Charges and credits, Net				3,070
Intangible assets impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax				3,321		$ 1,085
Charges and credits, Tax				815		248
Charges and credits, Net				2,506		837
Asset Performance Solutions Investments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			$ 730	1,264
Charges and credits, Tax			15	(4)
Charges and credits, Net			715	1,268
Multiclient seismic data impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			156
Charges and credits, Tax			2
Charges and credits, Net			154
North America pressure pumping asset impairments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax				587		1,575
Charges and credits, Tax				133		344
Charges and credits, Net				454		1,231
Workforce reductions
Charges And Credits [Line Items]
Charges and credits, Pretax								184
Charges and credits, Tax								20
Charges and credits, Net								164
Workforce reductions | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax		$ 63	1,021	202	68
Charges and credits, Tax			71	7	8
Charges and credits, Net		63	950	195	60
Other | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	$ 62	33	60	79		242
Charges and credits, Tax	4	1	4	9		13
Charges and credits, Net	58	32	56	70		229
Valuation allowance | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Tax				(164)
Charges and credits, Net				$ 164
Fixed Asset Impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			666
Charges and credits, Tax			52
Charges and credits, Net			614
Inventory Write Down | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			603
Charges and credits, Tax			49
Charges and credits, Net			554
Right Of Use Asset Impairments | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			311
Charges and credits, Tax			67
Charges and credits, Net			244
Costs Associated With Exiting Certain Activities1 | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			205
Charges and credits, Tax			(25)
Charges and credits, Net			230
Repurchase of bonds | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			40		22
Charges and credits, Tax			2		5
Charges and credits, Net			38		17
Postretirement Benefits Curtailment Gain | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax			(69)
Charges and credits, Tax			(16)
Charges and credits, Net			$ (53)
Facility exit charges | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax		254
Charges and credits, Tax		39
Charges and credits, Net		$ 215
Gain on sale of OneStim | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	(104)
Charges and credits, Tax	(11)
Charges and credits, Net	(93)
Unrealized Gain On Available For Sale Marketable Securities | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax	(39)
Charges and credits, Tax	(9)
Charges and credits, Net	$ (30)
North America restructuring | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax					225
Charges and credits, Tax					51
Charges and credits, Net					174
Other restructuring | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax					104
Charges and credits, Tax					(33)
Charges and credits, Net					137
Other North America - Related | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax						310
Charges and credits, Tax						53
Charges and credits, Net						257
Argentina | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax						127
Charges and credits, Net						127
Pension settlement accounting | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax					37
Charges and credits, Tax					8
Charges and credits, Net					29
Equity Method Investment, Other Than Temporary Impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax						231
Charges and credits, Tax						12
Charges and credits, Net						219
Gain on formation of Sensia joint venture | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax					(247)
Charges and credits, Tax					(42)
Charges and credits, Net					$ (205)
Asset Performance Solutions | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax						294
Charges and credits, Net						294
Goodwill impairment | Impairment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax						8,828
Charges and credits, Tax						43
Charges and credits, Net						$ 8,785
Gain on sale of marine seismic acquisition business
Charges And Credits [Line Items]
Charges and credits, Pretax								(215)
Charges and credits, Tax								(19)
Charges and credits, Net								(196)
Asset Impairment Charges
Charges And Credits [Line Items]
Charges and credits, Pretax								172
Charges and credits, Tax								16
Charges and credits, Net								$ 156

Charges and Credits - Additiona

Charges and Credits - Additional Information (Detail) $ in Millions

Oct. 01, 2019USD ($)

Aug. 31, 2019USD ($)Unit

Dec. 31, 2020USD ($)

Sep. 30, 2020USD ($)

Jun. 30, 2020USD ($)Emp

Mar. 31, 2020USD ($)Unit

Dec. 31, 2019USD ($)

Sep. 30, 2019USD ($)

Dec. 31, 2018USD ($)

Jun. 30, 2018USD ($)

Dec. 31, 2020USD ($)

Dec. 31, 2019USD ($)

Dec. 31, 2018USD ($)

Charges And Credits [Line Items]

Total number of reporting units | Unit

17

11

Goodwill

$ 16,000

Goodwill impairment charge

$ 3,100

Goodwill

$ 25,000

$ 12,980

$ 12,968

$ 16,042

$ 24,931

$ 12,980

$ 16,042

$ 24,931

Expected increase/decrease in discount rate assumption

50.00%

Number of reporting units fair value to be impacted | Unit

7

Intangible assets

1,085

$ 3,300

Restructuring Charges

104

Gains on sales of businesses

104

247

215

Expected increase in discount rate assumption

0.50%

Increase in goodwill impairment charge

$ 300

Expected decrease in discount rate assumption

0.50%

Decrease in goodwill impairment charge

$ 400

Benefits Paid

257

Non-cash settlement charge

37

37

Debt instrument, repurchase amount

22

22

Net proceeds from divestitures

$ 434

$ 348

Charges and credits

12,191

124

Rockwell Automation

Charges And Credits [Line Items]

Percentage of equity ownership interest

53.00%

Schlumberger

Charges And Credits [Line Items]

Percentage of equity ownership interest

47.00%

Cash recieved

$ 238

Gain of deconsolidation in formation of joint venture

247

Liberty Oilfield Services Inc.

Charges And Credits [Line Items]

Percentage of equity ownership interest

37.00%

37.00%

Gains on sales of businesses

$ 104

Investment

700

$ 700

Unrealized Gain on Investments

39

Investments, Fair Value

43

$ 43

Disposition

$ 62

North America

Charges And Credits [Line Items]

Intangible assets

243

Carrying Value Of Impaired Intangible Asset

Charges And Credits [Line Items]

Intangible assets

900

Carrying Value Of Impaired Intangible Asset | North America

Charges And Credits [Line Items]

Intangible assets

1,300

North America pressure pumping asset impairments | North America

Charges And Credits [Line Items]

Intangible assets

1,575

600

Severance

Charges And Credits [Line Items]

Intangible assets

13

202

62

Restructuring Charges

68

Severance | North America

Charges And Credits [Line Items]

Intangible assets

10

Severance | Argentina

Charges And Credits [Line Items]

Intangible assets

29

Other Restructuring

Charges And Credits [Line Items]

Intangible assets

79

45

Valuation allowance | North America

Charges And Credits [Line Items]

Intangible assets

164

Workforce reductions

Charges And Credits [Line Items]

Intangible assets

$ 1,021

Reduction in workforce | Emp

21,000

Restructuring Charges

63

Charges and credits

164

Workforce reductions | Impairments and Other

Charges And Credits [Line Items]

Charges and credits

$ 184

Asset Performance Solutions Investments | Latin America

Charges And Credits [Line Items]

Intangible assets

$ 730

Fixed Asset Impairment

Charges And Credits [Line Items]

Intangible assets

666

Fixed Asset Impairment | North America

Charges And Credits [Line Items]

Intangible assets

230

Inventory Write Down

Charges And Credits [Line Items]

Intangible assets

603

Inventory Write Down | North America

Charges And Credits [Line Items]

Intangible assets

70

Right Of Use Asset Impairments

Charges And Credits [Line Items]

Intangible assets

311

Costs Associated With Exiting Certain Activities1

Charges And Credits [Line Items]

Intangible assets

205

Multiclient seismic data impairment

Charges And Credits [Line Items]

Intangible assets

156

Other

Charges And Credits [Line Items]

Intangible assets

60

Restructuring Charges

33

Allowance For Doubtful Accounts

Charges And Credits [Line Items]

Intangible assets

42

Repurchase of bonds

Charges And Credits [Line Items]

Intangible assets

40

Postretirement Benefits Curtailment Gain

Charges And Credits [Line Items]

Intangible assets

$ 69

Facility exit charges

Charges And Credits [Line Items]

Restructuring Charges

$ 254

Charges of Pressure Pumping Equipment

Charges And Credits [Line Items]

Intangible assets

1,324

Operating Lease Right-of-use Asset

Charges And Credits [Line Items]

Intangible assets

98

Operating Lease Right-of-use Asset | North America

Charges And Credits [Line Items]

Restructuring Charges

55

Supplies Expense

Charges And Credits [Line Items]

Intangible assets

121

Inventory Charges

Charges And Credits [Line Items]

Intangible assets

19

Charges Related to Other Businesses | North America

Charges And Credits [Line Items]

Intangible assets

310

Production Related Impairment or Charges | Argentina

Charges And Credits [Line Items]

Intangible assets

127

Asset Impairment Charges

Charges And Credits [Line Items]

Charges and credits

156

Asset Impairment Charges | Argentina

Charges And Credits [Line Items]

Intangible assets

72

Devaluation Charge | Argentina

Charges And Credits [Line Items]

Intangible assets

26

Equity Method Investment, Other Than Temporary Impairment

Charges And Credits [Line Items]

Intangible assets

231

Carrying Value of Asset Production Solutions

Charges And Credits [Line Items]

Intangible assets

294

Restructuring Charges

Charges And Credits [Line Items]

Intangible assets

242

Acceleration of Stock-based Compensation Expense Associated With Certain Individuals

Charges And Credits [Line Items]

Intangible assets

57

Business Divestiture Costs

Charges And Credits [Line Items]

Intangible assets

49

Debt Instrument Premium Paid on Repurchase

Charges And Credits [Line Items]

Intangible assets

$ 29

Facility and other exit costs | North America

Charges And Credits [Line Items]

Restructuring Charges

225

Write Down Of Assets | North America

Charges And Credits [Line Items]

Restructuring Charges

123

Other Exit Costs | North America

Charges And Credits [Line Items]

Restructuring Charges

47

Sale Of Assets

Charges And Credits [Line Items]

Restructuring Charges

68

Facility Closure Costs

Charges And Credits [Line Items]

Restructuring Charges

$ 36

Marine Seismic Acquisition Business

Charges And Credits [Line Items]

Gains on sales of businesses

215

Net proceeds from divestitures

$ 600

Charges and credits

$ (196)

Marine Seismic Acquisition Business | Shearwater GeoServices

Charges And Credits [Line Items]

Percentage of equity ownership interest

15.00%

15.00%

Impairment of Long-Lived Assets | Impairments and Other

Charges And Credits [Line Items]

Charges and credits

$ 172

Cameron

Charges And Credits [Line Items]

Intangible assets

2,200

Smith International Inc Smith Aand Geoservices

Charges And Credits [Line Items]

Intangible assets

$ 842

$ 1,100

Minimum

Charges And Credits [Line Items]

Discount rate utilized

12.00%

12.50%

Maximum

Charges And Credits [Line Items]

Discount rate utilized

13.50%

14.00%

Expected percentage change in fair value of reporting units

5.00%

Seven Reporting Units

Charges And Credits [Line Items]

Total number of reporting units | Unit

7

7

Goodwill

$ 11,500

Goodwill

$ 13,800

Ten Reporting Units

Charges And Credits [Line Items]

Total number of reporting units | Unit

4

Goodwill

$ 4,500

Six Reporting Units

Charges And Credits [Line Items]

Total number of reporting units | Unit

6

Goodwill

$ 8.4

Six Reporting Units | Minimum

Charges And Credits [Line Items]

Goodwill

200

Six Reporting Units | Maximum

Charges And Credits [Line Items]

Goodwill

$ 5,000

Ten Reporting Units

Charges And Credits [Line Items]

Total number of reporting units | Unit

10

Goodwill

$ 11,200

Nine Reporting Units

Charges And Credits [Line Items]

Total number of reporting units | Unit

9

Goodwill impairment charge

$ 8,800

Inventories - Summary of Invent

Inventories - Summary of Inventory (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Raw materials & field materials	$ 1,573	$ 1,857
Work in progress	464	515
Finished goods	1,317	1,758
Inventories	$ 3,354	$ 4,130

Fixed Assets - Summary of Fixed

Fixed Assets - Summary of Fixed Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Fixed assets gross	$ 29,744	$ 35,009
Less: Accumulated depreciation	22,918	25,739
Fixed assets less accumulated depreciation	6,826	9,270
Land
Property Plant And Equipment [Line Items]
Fixed assets gross	362	483
Buildings & improvements
Property Plant And Equipment [Line Items]
Fixed assets gross	3,757	5,156
Machinery & equipment
Property Plant And Equipment [Line Items]
Fixed assets gross	$ 25,625	$ 29,370

Fixed Assets - Additional Infor

Fixed Assets - Additional Information (Detail) - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Depreciation expense relating to fixed assets	$ 1.6	$ 2	$ 2.1
Building and Building Improvements | Minimum
Property Plant And Equipment [Line Items]
Useful Life	25 years
Building and Building Improvements | Maximum
Property Plant And Equipment [Line Items]
Useful Life	30 years
Machinery and Equipment | Minimum
Property Plant And Equipment [Line Items]
Useful Life	5 years
Machinery and Equipment | Maximum
Property Plant And Equipment [Line Items]
Useful Life	10 years

Multiclient Seismic Data - Chan

Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Multiclient Seismic Data [Abstract]
Opening balance	$ 568	$ 601
Capitalized in period	101	231
Charged to expense	(174)	(264)
Impairment charge (see Note 3)	(156)
Other	(22)
Ending balance	$ 317	$ 568

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 12,968	$ 16,042	$ 24,931
Impairment (see Note 3)		(3,070)	(8,828)
Impact of changes in exchange rates and other	12	(4)	(61)
Goodwill, Ending Balance	12,980	12,968	16,042
Production Systems
Goodwill [Line Items]
Goodwill, Beginning Balance	854
Impact of changes in exchange rates and other	(1)
Goodwill, Ending Balance	853	854
Operating Segments | Reservoir Characterization
Goodwill [Line Items]
Goodwill, Beginning Balance	4,560	4,560	4,703
Impairment (see Note 3)			(97)
Impact of changes in exchange rates and other			(46)
Goodwill, Ending Balance		4,560	4,560
Operating Segments | Drilling
Goodwill [Line Items]
Goodwill, Beginning Balance	5,443	7,092	10,111
Impairment (see Note 3)		(1,659)	(3,025)
Impact of changes in exchange rates and other		10	6
Goodwill, Ending Balance		5,443	7,092
Operating Segments | Production
Goodwill [Line Items]
Goodwill, Beginning Balance	2,704	3,949	4,678
Impairment (see Note 3)		(1,228)	(705)
Impact of changes in exchange rates and other		(17)	(24)
Goodwill, Ending Balance		2,704	3,949
Operating Segments | Cameron
Goodwill [Line Items]
Goodwill, Beginning Balance	261	441	5,439
Impairment (see Note 3)		(183)	(5,001)
Impact of changes in exchange rates and other		3	3
Goodwill, Ending Balance		261	$ 441
Operating Segments | Digital Integration
Goodwill [Line Items]
Goodwill, Beginning Balance	2,041
Impact of changes in exchange rates and other	6
Goodwill, Ending Balance	2,047	2,041
Operating Segments | Reservoir Performance
Goodwill [Line Items]
Goodwill, Beginning Balance	3,806
Impact of changes in exchange rates and other	(4)
Goodwill, Ending Balance	3,802	3,806
Operating Segments | Well Construction
Goodwill [Line Items]
Goodwill, Beginning Balance	6,267
Impact of changes in exchange rates and other	11
Goodwill, Ending Balance	$ 6,278	$ 6,267

Intangible Assets - Schedule of

Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 5,283	$ 9,676
Accumulated Amortization	1,828	2,587
Net Book Value	3,455	7,089
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,744	3,779
Accumulated Amortization	485	868
Net Book Value	1,259	2,911
Technology/Technical Know-How
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,284	2,498
Accumulated Amortization	488	779
Net Book Value	796	1,719
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	767	1,885
Accumulated Amortization	166	264
Net Book Value	601	1,621
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,488	1,514
Accumulated Amortization	689	676
Net Book Value	$ 799	$ 838

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Estimated amortization charged to income, 2021	$ 307
Estimated amortization charged to income, 2022	304
Estimated amortization charged to income, 2023	293
Estimated amortization charged to income, 2024	269
Estimated amortization charged to income, 2025	259
Amortization expense	$ 371	$ 618	$ 673
Customer Relationships | Minimum
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	18 years
Customer Relationships | Maximum
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	28 years
Technology/Technical Know-How | Minimum
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Technology/Technical Know-How | Maximum
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	18 years
Tradenames | Minimum
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Tradenames | Maximum
Finite Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	30 years

Long-term Debt and Debt Facil_3

Long-term Debt and Debt Facility Agreements - Long-term Debt (Detail) $ in Millions, € in Billions	Dec. 31, 2020USD ($)	Jun. 30, 2020EUR (€)	Dec. 31, 2019USD ($)
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 16,036	€ 5	$ 14,770
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,496		1,495
3.90% Senior Notes due 2028
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,450		1,444
1.375% Guaranteed Notes due 2026
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,221
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	999		998
2.0% Guaranteed Notes due 2032
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,214
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount	930		929
4.30% Senior Notes due 2029
Debt Instrument [Line Items]
Long-term debt, carrying amount	846		845
0.50% Notes due 2031
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,099		544
3.75% Senior Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	746		746
2.65% Senior Notes due 2030
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,250
1.00% Guaranteed Notes due 2026
Debt Instrument [Line Items]
Long-term debt, carrying amount	736		665
2.65% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	598		598
1.40% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount	498
0.25% Notes due 2027
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,100		550
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	295		294
7.00% Notes due 2038
Debt Instrument [Line Items]
Long-term debt, carrying amount	206		208
5.95% Notes due 2041
Debt Instrument [Line Items]
Long-term debt, carrying amount	114		114
5.13% Notes due 2043
Debt Instrument [Line Items]
Long-term debt, carrying amount	99		99
0.00% Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	611		551
4.00% Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	80		81
3.70% Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	55		55
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount			1,597
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount			600
Other
Debt Instrument [Line Items]
Long-term debt, carrying amount			135
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 393		$ 2,222

Long-term Debt and Debt Facil_4

Long-term Debt and Debt Facility Agreements - Long-term Debt (Parenthetical) (Detail)	3 Months Ended							12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Debt instrument interest rate				3.65%				3.65%	3.65%
Debt instrument maturity date								2023	2023
3.90% Senior Notes due 2028
Debt Instrument [Line Items]
Debt instrument interest rate				3.90%		3.90%		3.90%	3.90%
Debt instrument maturity date						2028		2028	2028
1.375% Notes due 2026
Debt Instrument [Line Items]
Debt instrument interest rate		1.375%		1.375%				1.375%	1.375%
Debt instrument maturity date		2026						2026	2026
2.0% Notes due 2032
Debt Instrument [Line Items]
Debt instrument interest rate		2.00%		2.00%				2.00%	2.00%
Debt instrument maturity date		2032						2032	2032
0.25% Notes due 2027
Debt Instrument [Line Items]
Debt instrument interest rate			0.25%	0.25%	0.25%			0.25%	0.25%
Debt instrument maturity date			2027		2027			2027	2027
0.50% Notes due 2031
Debt Instrument [Line Items]
Debt instrument interest rate			0.50%	0.50%	0.50%			0.50%	0.50%
Debt instrument maturity date			2031		2031			2031	2031
2.65% Senior Notes due 2030
Debt Instrument [Line Items]
Debt instrument interest rate		2.65%		2.65%				2.65%	2.65%
Debt instrument maturity date		2030						2030	2030
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate				2.40%				2.40%	2.40%
Debt instrument maturity date								2022	2022
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate				4.00%				4.00%	4.00%
Debt instrument maturity date								2025	2025
4.30% Senior Notes due 2029
Debt Instrument [Line Items]
Debt instrument interest rate				4.30%			4.30%	4.30%	4.30%
Debt instrument maturity date							2029	2029	2029
3.75% Senior Notes due 2024
Debt Instrument [Line Items]
Debt instrument interest rate				3.75%			3.75%	3.75%	3.75%
Debt instrument maturity date							2024	2024	2024
1.00% Guaranteed Notes due 2026
Debt Instrument [Line Items]
Debt instrument interest rate				1.00%				1.00%	1.00%
Debt instrument maturity date								2026	2026
0.00% Notes due 2024
Debt Instrument [Line Items]
Debt instrument interest rate				0.00%	0.00%			0.00%	0.00%
Debt instrument maturity date					2024			2024	2024
2.65% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate				2.65%				2.65%	2.65%
Debt instrument maturity date								2022	2022
1.40% Senior Notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate	1.40%			1.40%				1.40%	1.40%
Debt instrument maturity date	2025							2025	2025
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate				3.63%		3.63%		3.63%	3.63%
Debt instrument maturity date						2022		2022	2022
7.00% Notes due 2038
Debt Instrument [Line Items]
Debt instrument interest rate				7.00%				7.00%	7.00%
Debt instrument maturity date								2038	2038
4.00% Notes due 2023
Debt Instrument [Line Items]
Debt instrument interest rate				4.00%				4.00%	4.00%
Debt instrument maturity date								2023	2023
5.95% Notes due 2041
Debt Instrument [Line Items]
Debt instrument interest rate				5.95%				5.95%	5.95%
Debt instrument maturity date								2041	2041
5.13% Notes due 2043
Debt Instrument [Line Items]
Debt instrument interest rate				5.13%				5.13%	5.13%
Debt instrument maturity date								2043	2043
3.70% Notes due 2024
Debt Instrument [Line Items]
Debt instrument interest rate				3.70%				3.70%	3.70%
Debt instrument maturity date								2024	2024
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		3.30%		3.30%				3.30%	3.30%
Debt instrument maturity date		2021						2021	2021
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		4.20%		4.20%				4.20%	4.20%
Debt instrument maturity date		2021		2021				2021	2021

Long-term Debt and Debt Facil_5

Long-term Debt and Debt Facility Agreements - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended							12 Months Ended
	Sep. 30, 2020USD ($)	Jun. 30, 2020USD ($)	Mar. 31, 2020EUR (€)	Dec. 31, 2019USD ($)	Sep. 30, 2019USD ($)	Jun. 30, 2019USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2020USD ($)	Dec. 31, 2019USD ($)	Dec. 31, 2020EUR (€)	Jun. 30, 2020EUR (€)	Dec. 31, 2019EUR (€)	Sep. 30, 2019EUR (€)
Debt Instrument [Line Items]
Debt instrument premium paid on repurchase		$ 40		$ 28	$ 29
Long-term debt, carrying amount				14,770				$ 16,036	$ 14,770		€ 5,000
Debt instrument premium paid						$ 48
Committed credit facility agreement aggregated								6,250
Unused credit facility								$ 5,860
Weighted average interest rate on variable rate debt								1.00%		1.00%
Long-term Debt maturity in 2022								$ 1,900
Long-term Debt maturity in 2023								1,900
Long-term Debt maturity in 2024								1,400
Long-term Debt maturity in 2025								1,500
Long-term Debt maturity in 2026								2,000
Long-term Debt maturity in 2027								1,100
Long-term Debt maturity thereafter								6,300
Long-term debt, fair value				15,300				$ 17,300	15,300
Schlumberger Investment SA
Debt Instrument [Line Items]
Investment in subsidiary								100.00%
Commercial paper programs mature in February 2023
Debt Instrument [Line Items]
Committed credit facility agreement aggregated								$ 2,750
Commercial paper programs mature in July 2025
Debt Instrument [Line Items]
Committed credit facility agreement aggregated								1,500
Commercial paper programs mature in February 2024
Debt Instrument [Line Items]
Committed credit facility agreement aggregated								2,000
Commercial paper programs mature in June 2021 | Revolving Credit Facility
Debt Instrument [Line Items]
Committed credit facility agreement aggregated | €										€ 1,540
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt, carrying amount				2,222				393	2,222
Long-term debt				$ 2,200				$ 400	$ 2,200
3.00% Senior Notes due 2020
Debt Instrument [Line Items]
Notes, face amount					$ 783
Debt instrument interest rate				3.00%	3.00%	3.00%			3.00%			3.00%	3.00%
Debt instrument maturity date				2020	2020	2020
Debt instrument, repurchase amount				$ 416					$ 416
Debt instrument, amount exchanged						$ 401
4.5% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate				4.50%					4.50%			4.50%
Debt instrument maturity date				2021
Debt instrument, repurchase amount				$ 126					$ 126
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		4.20%		4.20%				4.20%	4.20%	4.20%	4.20%	4.20%
Debt instrument maturity date		2021		2021				2021	2021
Debt instrument, repurchase amount		$ 600		$ 500					$ 500
Long-term debt, carrying amount				$ 600					$ 600
0.25% Notes due 2027
Debt Instrument [Line Items]
Notes, face amount	$ 500		€ 400									€ 500	€ 500
Debt instrument interest rate			0.25%	0.25%	0.25%			0.25%	0.25%	0.25%		0.25%	0.25%
Debt instrument maturity date			2027		2027			2027	2027
Long-term debt, carrying amount				$ 550				$ 1,100	$ 550
3.60% Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate				3.60%					3.60%			3.60%
Debt instrument maturity date				2022
Debt instrument, repurchase amount				$ 106					$ 106
0.50% Notes due 2031
Debt Instrument [Line Items]
Notes, face amount | €			€ 400									€ 500	€ 500
Debt instrument interest rate			0.50%	0.50%	0.50%			0.50%	0.50%	0.50%		0.50%	0.50%
Debt instrument maturity date			2031		2031			2031	2031
Long-term debt, carrying amount				$ 544				$ 1,099	$ 544
1.375% Notes due 2026
Debt Instrument [Line Items]
Notes, face amount | €											€ 1,000
Debt instrument interest rate		1.375%		1.375%				1.375%	1.375%	1.375%	1.375%	1.375%
Debt instrument maturity date		2026						2026	2026
Long-term debt, carrying amount								$ 1,221
2.65% Senior Notes due 2030
Debt Instrument [Line Items]
Notes, face amount		$ 900
Debt instrument interest rate		2.65%		2.65%				2.65%	2.65%	2.65%	2.65%	2.65%
Debt instrument maturity date		2030						2030	2030
Long-term debt, carrying amount								$ 1,250
2.0% Notes due 2032
Debt Instrument [Line Items]
Notes, face amount | €											€ 1,000
Debt instrument interest rate		2.00%		2.00%				2.00%	2.00%	2.00%	2.00%	2.00%
Debt instrument maturity date		2032						2032	2032
Long-term debt, carrying amount								$ 1,214
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate		3.30%		3.30%				3.30%	3.30%	3.30%	3.30%	3.30%
Debt instrument maturity date		2021						2021	2021
Debt instrument, repurchase amount		$ 935
Long-term debt, carrying amount				$ 1,597					$ 1,597
1.40% Senior Notes due 2025
Debt Instrument [Line Items]
Notes, face amount	$ 500
Debt instrument interest rate	1.40%			1.40%				1.40%	1.40%	1.40%		1.40%
Debt instrument maturity date	2025							2025	2025
Long-term debt, carrying amount								$ 498
2.65% Senior Notes due 2030
Debt Instrument [Line Items]
Notes, face amount	$ 350
Debt instrument interest rate	2.65%
Debt instrument maturity date	2030
0.00% Notes due 2024
Debt Instrument [Line Items]
Notes, face amount | €												€ 500	€ 500
Debt instrument interest rate				0.00%	0.00%			0.00%	0.00%	0.00%		0.00%	0.00%
Debt instrument maturity date					2024			2024	2024
Long-term debt, carrying amount				$ 551				$ 611	$ 551
3.625% Senior Notes due 2022
Debt Instrument [Line Items]
Notes, face amount					$ 321
Debt instrument interest rate					3.625%								3.625%
Debt instrument maturity date					2022
3.90% Senior Notes due 2028
Debt Instrument [Line Items]
Notes, face amount						$ 1,500
Debt instrument interest rate				3.90%		3.90%		3.90%	3.90%	3.90%		3.90%
Debt instrument maturity date						2028		2028	2028
Long-term debt, carrying amount				$ 1,444				$ 1,450	$ 1,444
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate				3.63%		3.63%		3.63%	3.63%	3.63%		3.63%
Debt instrument maturity date						2022		2022	2022
Long-term debt, carrying amount				$ 294				$ 295	$ 294
Debt instrument, amount exchanged						$ 234
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate						4.00%
Debt instrument maturity date						2025
Debt instrument, amount exchanged						$ 817
3.75% Senior Notes due 2024
Debt Instrument [Line Items]
Notes, face amount							$ 750
Debt instrument interest rate				3.75%			3.75%	3.75%	3.75%	3.75%		3.75%
Debt instrument maturity date							2024	2024	2024
Long-term debt, carrying amount				$ 746				$ 746	$ 746
4.30% Senior Notes due 2029
Debt Instrument [Line Items]
Notes, face amount							$ 850
Debt instrument interest rate				4.30%			4.30%	4.30%	4.30%	4.30%		4.30%
Debt instrument maturity date							2029	2029	2029
Long-term debt, carrying amount				$ 845				$ 846	$ 845

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2020USD ($)Country	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Sep. 30, 2020USD ($)	Jun. 30, 2020EUR (€)	Mar. 31, 2020EUR (€)	Dec. 31, 2019EUR (€)	Sep. 30, 2019EUR (€)
Derivative [Line Items]
Number of countries in which Schlumberger generates revenue | Country	120
Percentage of revenue denominated in domestic currency	73.00%
Denominated debt issued				$ 500,000,000	€ 2,000,000,000	€ 800,000,000	€ 1,500,000,000
Transaction gains (losses) of hedging activities	$ 21,000,000	$ 2,000,000	$ 1,000,000
Fair value of outstanding derivatives	$ 0	$ 0
0.00% Notes due 2024
Derivative [Line Items]
Notes, face amount | €							€ 500,000,000	€ 500,000,000
Derivative swap interest rate		0.00%					0.00%
Promissory note interest rate	0.00%	0.00%					0.00%	0.00%
0.25% Notes due 2027
Derivative [Line Items]
Notes, face amount				$ 500,000,000		€ 400,000,000	€ 500,000,000	€ 500,000,000
Derivative swap interest rate		0.25%		1.40%		0.25%	0.25%
Promissory note interest rate	0.25%	0.25%				0.25%	0.25%	0.25%
0.50% Notes due 2031
Derivative [Line Items]
Notes, face amount | €						€ 400,000,000	€ 500,000,000	€ 500,000,000
Derivative swap interest rate		0.50%				0.50%	0.50%
Promissory note interest rate	0.50%	0.50%				0.50%	0.50%	0.50%
1.40% Senior Notes due 2025
Derivative [Line Items]
Notes, face amount				$ 500,000,000
Promissory note interest rate	1.40%	1.40%		1.40%			1.40%
1.375% Notes due 2026
Derivative [Line Items]
Notes, face amount | €					€ 1,000,000,000
Derivative swap interest rate					1.375%
Promissory note interest rate	1.375%	1.375%			1.375%		1.375%
2.00% Notes due 2032
Derivative [Line Items]
Notes, face amount | €					€ 1,000,000,000
Derivative swap interest rate					2.00%
Cross currency swaps
Derivative [Line Items]
Notional amount of interest rate swap				$ 500,000,000	€ 2,000,000,000	€ 800,000,000	€ 1,500,000,000
Cross currency swaps | 0.00% Notes due 2024
Derivative [Line Items]
Promissory note interest rate		2.29%					2.29%
Cross currency swaps | 0.25% Notes due 2027
Derivative [Line Items]
Promissory note interest rate		2.51%				1.87%	2.51%
Cross currency swaps | 0.50% Notes due 2031
Derivative [Line Items]
Promissory note interest rate		2.76%				2.20%	2.76%
Cross currency swaps | 1.40% Senior Notes due 2025
Derivative [Line Items]
Promissory note interest rate				1.73%
Cross currency swaps | 1.375% Notes due 2026
Derivative [Line Items]
Promissory note interest rate					2.77%
Cross currency swaps | 2.00% Notes due 2032
Derivative [Line Items]
Promissory note interest rate					3.49%
Cross currency swaps | Other Assets
Derivative [Line Items]
Derivative assets	$ 427,000,000	$ 41,000,000
Cross currency swaps | Other Liabilities
Derivative [Line Items]
Derivative liability	13,000,000	$ 38,000,000
Foreign exchange contracts
Derivative [Line Items]
Notional amount of interest rate swap	8,600,000,000
Foreign exchange contracts | Debt | Derivatives designated as hedges
Derivative [Line Items]
Notional amount of interest rate swap	$ 6,400,000,000

Derivative Instruments and He_4

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) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivatives not designated as hedges | Foreign exchange contracts | Cost of services/sales
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ (29)	$ (5)	$ 40
Cash Flow Hedging | Derivatives designated as hedges
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	488	(45)	54
Cash Flow Hedging | Derivatives designated as hedges | Cross currency swaps | Cost of services/sales
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	493	(35)	55
Cash Flow Hedging | Derivatives designated as hedges | Foreign exchange contracts | Cost of services/sales
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ (5)	$ (10)	$ (1)

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity [Abstract]
Common stock, shares authorized	4,500,000,000
Common stock, par value	$ 0.01
Common stock, shares outstanding	1,392,325,960	1,384,515,345
Preferred stock, shares authorized	200,000,000
Preferred stock, par value	$ 0.01
Preferred stock, issued	0
Other comprehensive income (loss)	$ (447)	$ 184	$ (239)

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 24,176	$ 36,586	$ 37,261
Reclassification to Retained Earnings of stranded tax effects resulting from US tax reform			(109)
Other comprehensive income (loss) before reclassifications	(576)	162	(404)
Amounts reclassified from accumulated other comprehensive loss	168	93	183
Income taxes	(38)	(71)	(18)
Balance	12,489	24,176	36,586
Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,263)	(2,330)	(2,139)
Other comprehensive income (loss) before reclassifications	(239)	67	(191)
Balance	(2,502)	(2,263)	(2,330)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	2	2	13
Other comprehensive income (loss) before reclassifications			(11)
Balance	2	2	2
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(34)	(12)	3
Other comprehensive income (loss) before reclassifications	(90)	(32)	(16)
Amounts reclassified from accumulated other comprehensive loss	54	10	1
Balance	(70)	(34)	(12)
Pension and Other Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,143)	(2,282)	(2,151)
Reclassification to Retained Earnings of stranded tax effects resulting from US tax reform			(109)
Other comprehensive income (loss) before reclassifications	(247)	127	(186)
Amounts reclassified from accumulated other comprehensive loss	114	83	182
Income taxes	(38)	(71)	(18)
Balance	(2,314)	(2,143)	(2,282)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(4,438)	(4,622)	(4,274)
Reclassification to Retained Earnings of stranded tax effects resulting from US tax reform			(109)
Balance	$ (4,884)	$ (4,438)	$ (4,622)

Stock-based Compensation Plan_2

Stock-based Compensation Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value of stock options outstanding	$ 0
Intrinsic value of stock options exercisable	0
Total intrinsic value of options exercised	0	$ 4,000,000	$ 15,000,000
Total unrecognized compensation cost related to nonvested stock-based compensation arrangements	335,000,000
Expected to be recognized in 2021	198,000,000
Expected to be recognized in 2022	102,000,000
Expected to be recognized in 2023	26,000,000
Expected to be recognized in 2024	$ 9,000,000
Future Grants Shares	16,000,000
Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock option maximum term	10 years
Stock options vesting period	over five years
Weighted-average remaining contractual life of stock options exercisable, in years	3 years 3 months 18 days
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance shares outstanding	3,800,000
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	10,637,000	7,888,000	3,204,000
Performance shares outstanding	18,763,000	11,822,000	6,951,000	5,428,000
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 Plan_3

Stock-based Compensation Plans - Weighted-Average Assumptions (Detail) - Employee Stock Option - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	5.20%	4.80%	2.60%
Expected volatility	26.00%	25.00%	26.00%
Risk-free interest rate	1.70%	2.70%	2.60%
Expected option life in years	7 years	7 years	7 years
Weighted-average fair value per share	$ 5.07	$ 6.21	$ 17.37

Stock-based Compensation Plan_4

Stock-based Compensation Plans - Options Outstanding and Option Exercisable (Detail) shares in Thousands	12 Months Ended
	Dec. 31, 2020$ / sharesshares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Options Outstanding | shares	48,272
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	4 years 9 months 18 days
Options Outstanding, Weighted- Average Exercise Price	$ 70.37
Options Exercisable | shares	33,163
Options Exercisable, Weighted-Average Exercise Price	$ 79.70
Exercise prices range $38.75 - $69.98
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	38.75
Exercise prices maximum range	$ 69.98
Options Outstanding | shares	15,562
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	7 years 8 months 12 days
Options Outstanding, Weighted- Average Exercise Price	$ 44.48
Options Exercisable | shares	3,846
Options Exercisable, Weighted-Average Exercise Price	$ 56.69
Exercise prices range $70.31 - $76.74
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	70.31
Exercise prices maximum range	$ 76.74
Options Outstanding | shares	9,462
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	2 years 1 month 6 days
Options Outstanding, Weighted- Average Exercise Price	$ 72.10
Options Exercisable | shares	9,399
Options Exercisable, Weighted-Average Exercise Price	$ 72.06
Exercise prices range $77.10 - $83.15
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	77.10
Exercise prices maximum range	$ 83.15
Options Outstanding | shares	7,303
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	5 years 4 months 24 days
Options Outstanding, Weighted- Average Exercise Price	$ 79.29
Options Exercisable | shares	5,425
Options Exercisable, Weighted-Average Exercise Price	$ 79.52
Exercise prices range $83.89 - $88.77
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	83.89
Exercise prices maximum range	$ 88.77
Options Outstanding | shares	8,549
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	3 years
Options Outstanding, Weighted- Average Exercise Price	$ 85.96
Options Exercisable | shares	7,097
Options Exercisable, Weighted-Average Exercise Price	$ 85.66
Exercise prices range $90.00 - $114.83
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Exercise prices minimum range	90
Exercise prices maximum range	$ 114.83
Options Outstanding | shares	7,396
Options Outstanding, Weighted-Average Remaining Contractual Life (in years)	3 years 4 months 24 days
Options Outstanding, Weighted- Average Exercise Price	$ 95.79
Options Exercisable | shares	7,396
Options Exercisable, Weighted-Average Exercise Price	$ 95.79

Stock-based Compensation Plan_5

Stock-based Compensation Plans - Summary of Stock Option Activity (Detail) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding at beginning of year, Shares	46,269	43,529	47,210
Granted, Shares	7,468	5,604	2,121
Exercised, Shares		(1,045)	(936)
Forfeited, Shares	(5,465)	(1,819)	(4,866)
Outstanding at year-end, Shares	48,272	46,269	43,529
Outstanding at beginning of year, Weighted-Average Exercise Price	$ 75.65	$ 79.36	$ 79.13
Granted, Weighted-Average Exercise Price	38.75	41.50	76.95
Exercised, Weighted-Average Exercise Price		38.50	54.20
Forfeited, Weighted-Average Exercise Price	71.86	74.69	84.19
Outstanding at year-end, Weighted-Average Exercise Price	$ 70.37	$ 75.65	$ 79.36

Stock-based Compensation Plan_6

Stock-based Compensation Plans - Restricted Stock Transactions (Detail) - Restricted Stock - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unvested at beginning of year, Restricted Stock	11,822	6,951	5,428
Granted, Restricted Stock	10,637	7,888	3,204
Vested, Restricted Stock	(3,059)	(2,722)	(982)
Forfeited, Restricted Stock	(637)	(295)	(699)
Unvested at year-end, Restricted Stock	18,763	11,822	6,951
Unvested at beginning of year, Weighted-Average Grant Date Fair Value	$ 49.86	$ 70.13	$ 72.33
Granted, Weighted-Average Grant Date Fair Value	26.53	35.56	70.54
Vested, Weighted-Average Grant Date Fair Value	71.56	72.09	77.62
Forfeited, Weighted-Average Grant Date Fair Value	45.95	57.41	70.67
Unvested at year-end, Weighted-Average Grant Date Fair Value	$ 35.24	$ 49.86	$ 70.13

Stock-based Compensation Plan_7

Stock-based Compensation Plans - Discounted Stock Purchase Plan Assumptions and Resulting Weighted Average Fair Value (Detail) - DSPP - $ / shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	4.00%	5.30%	2.90%
Expected volatility	43.00%	30.00%	22.00%
Risk-free interest rate	0.88%	2.30%	1.60%
Weighted-average fair value per share	$ 5.38	$ 5.81	$ 9.01

Stock-based Compensation Plan_8

Stock-based Compensation Plans - Stock-Based Compensation Expense Recognized in Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 397	$ 405	$ 345
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	75	99	134
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	293	274	179
DSPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 29	$ 32	$ 32

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2020USD ($)Jurisdictions	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Income Tax Disclosure [Line Items]
Minimum number of jurisdictions to Schlumberger operates | Jurisdictions	100
US federal statutory rate	21.00%	21.00%	21.00%
Restructuring and other charges	$ 12,515	$ 12,901	$ 141
Deferred tax assets, valuation allowances relating to net operating losses in certain countries	127	82
Foreign tax credits	106	312
Deferred tax assets, capital losses	54
Net operating losses	421	144
Accrued interest and penalties	184	188	205
Domestic Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	3,961	8,769	102
Foreign Country
Income Tax Disclosure [Line Items]
Restructuring and other charges	$ 8,554	$ 4,132	$ 39
Minimum
Income Tax Disclosure [Line Items]
US federal statutory rate	0.00%
Maximum
Income Tax Disclosure [Line Items]
US federal statutory rate	35.00%

Income Taxes - Income (Loss) Be

Income Taxes - Income (Loss) Before Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income before taxes, United States	$ (4,394)	$ (8,991)	$ (55)
Income before taxes, Outside United States	(6,904)	(1,427)	2,679
Income (loss) before taxes	$ (11,298)	$ (10,418)	$ 2,624

Income Taxes - Components of Ne

Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Intangible assets	$ (881)	$ (1,790)
Net operating losses	421	144
Fixed assets, net	151	434
Inventories	59	155
Investments in non-US subsidiaries	(171)	(220)
Foreign tax credits	106	312
Other, net	402	474
Net deferred tax assets (liabilities)	$ (19)	$ (491)

Income Taxes - Components of Ta

Income Taxes - Components of Tax Expense (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current:
United States-Federal	$ 21	$ (81)	$ 124
United States-State	5	11	(50)
Outside United States	410	770	618
Current Income Tax Expense (Benefit), Total	436	700	692
Deferred:
United States-Federal	(824)	(660)	(143)
United States-State	(67)	(93)	(4)
Outside United States	(563)	(257)	(69)
Valuation allowance	206	(1)	(29)
Deferred income taxes	(1,248)	(1,011)	(245)
Consolidated taxes on (loss) income	$ (812)	$ (311)	$ 447

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of US Statutory Federal Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
US federal statutory rate	21.00%	21.00%	21.00%
State tax			(2.00%)
Non-US income taxed at different rates			(2.00%)
Other		1.00%
Effective income tax rate	7.00%	3.00%	17.00%
Charges And Credits
Disclosure Income Tax Reconciliation Of U S Statutory Federal Tax Rate Detail [Line Items]
Charges and credits (See Note 3)	(14.00%)	(19.00%)

Income Taxes - Reconciliation_2

Income Taxes - Reconciliation of Liabilities Associated with Uncertain Tax Provisions (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 1,301	$ 1,433	$ 1,393
Additions based on tax positions related to the current year	76	86	88
Additions for tax positions of prior years	78	65	145
Impact of changes in exchange rates	(3)	2	(41)
Settlements with tax authorities	(15)	(50)	(22)
Reductions for tax positions of prior years	(87)	(176)	(57)
Reductions due to the lapse of the applicable statute of limitations	(79)	(59)	(73)
Balance at end of year	$ 1,271	$ 1,301	$ 1,433

Income Taxes - Tax Years Subjec

Income Taxes - Tax Years Subject to Examination by Tax Authorities (Detail)	12 Months Ended
	Dec. 31, 2020
Canada | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2013
Canada | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
Ecuador | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2016
Ecuador | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
Mexico | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2012
Mexico | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
Norway | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2015
Norway | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
Russia | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2016
Russia | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
Saudi Arabia | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2015
Saudi Arabia | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
United Kingdom | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2017
United Kingdom | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020
United States | Earliest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2017
United States | Latest Tax Year
Income Tax Examination [Line Items]
Income tax examination, year(s) under examination	2020

Leases and Lease Commitments -

Leases and Lease Commitments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Total rental expense	$ 1,400	$ 1,700	$ 1,700
Operating lease, asset	$ 800	$ 1,300
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsMember	us-gaap:OtherAssetsMember
Operating lease, liability	$ 1,011	$ 1,000
Operating lease, weighted average remaining lease term	8 years
Operating lease, weighted average discount rate, percent	3.20%
Accounts Payable and Accrued Liabilities
Operating Leased Assets [Line Items]
Operating lease, liability	$ 248	200
Other Liabilities
Operating Leased Assets [Line Items]
Operating lease, liability	$ 763	$ 800

Leases and Lease Commitments _2

Leases and Lease Commitments - Maturities of Operating Lease Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating Leased Assets [Line Items]
2021	$ 256
2022	200
2023	160
2024	128
2025	92
Thereafter	318
Total lease payments	1,154
Less: Interest	(143)
Operating lease, liability	1,011	$ 1,000
Accounts Payable and Accrued Liabilities
Operating Leased Assets [Line Items]
Operating lease, liability	248	200
Other Liabilities
Operating Leased Assets [Line Items]
Operating lease, liability	$ 763	$ 800

Segment Information - Schedule

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue		$ 23,601	$ 32,917	$ 32,815
Income Before Taxes		(11,298)	(10,418)	2,624
Assets		42,434	56,312	70,507
Depreciation and Amortization	[1]	2,566	3,589	3,556
Capital Investments		1,520	2,736	3,241
Pretax segment operating income		2,401	3,978	4,187
Interest expense		563	609	575
Charges & credits		12,515	12,901	141
Digital Integration
Segment Reporting Information [Line Items]
Revenue		3,076	4,145	3,820
Reservoir Performance
Segment Reporting Information [Line Items]
Revenue		5,602	9,299	10,050
Well Construction
Segment Reporting Information [Line Items]
Revenue		8,605	11,880	11,310
Production Systems
Segment Reporting Information [Line Items]
Revenue		6,650	8,167	8,168
Operating Segments
Segment Reporting Information [Line Items]
Revenue		23,601	32,917	32,815
Interest income		2	8	8
Interest expense		28	38	38
Operating Segments | Digital Integration
Segment Reporting Information [Line Items]
Revenue		3,076	4,145	3,820
Income Before Taxes		731	882	882
Assets		3,595	6,388	6,784
Depreciation and Amortization		615	1,069	894
Capital Investments		413	1,020	1,091
Operating Segments | Reservoir Performance
Segment Reporting Information [Line Items]
Revenue		5,602	9,299	10,050
Income Before Taxes		353	992	1,169
Assets		3,489	5,198	7,396
Depreciation and Amortization		549	807	850
Capital Investments		384	569	899
Operating Segments | Well Construction
Segment Reporting Information [Line Items]
Revenue		8,605	11,880	11,310
Income Before Taxes		866	1,429	1,465
Assets		4,768	6,913	7,112
Depreciation and Amortization		580	656	713
Capital Investments		420	650	769
Operating Segments | Production Systems
Segment Reporting Information [Line Items]
Revenue		6,650	8,167	8,168
Income Before Taxes		623	847	843
Assets		4,665	5,625	5,632
Depreciation and Amortization		338	390	423
Capital Investments		240	384	343
Eliminations & other
Segment Reporting Information [Line Items]
Revenue		(332)	(574)	(533)
Income Before Taxes		(172)	(172)	(172)
Assets		940	1,314	1,448
Depreciation and Amortization		276	250	237
Capital Investments		63	113	139
Goodwill and intangible assets		16,436	23,130	33,658
Cash and short-term investments		3,006	2,167	2,777
All other assets		5,535	5,577	5,700
Corporate & other	[2]	(681)	(957)	(937)
Interest income	[3]	31	33	52
Interest expense	[4]	(534)	(571)	(537)
Charges & credits	[5]	(12,515)	(12,901)	(141)
Eliminations & other | Corporate and Other
Segment Reporting Information [Line Items]
Depreciation and Amortization	[2]	$ 208	$ 417	$ 439
[1]	Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and APS investments.
[2]	Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.
[3]	Interest income excludes amounts which are included in the segments’ income (2020: $2 million; 2019: $8 million; 2018: $8 million).
[4]	Interest expense excludes amounts which are included in the segments’ income (2020: $28 million; 2019: $38 million; 2018: $38 million).
[5]	See Note 3 – Charges and Credits .

Segment Information - Schedul_2

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Interest expense	$ 563	$ 609	$ 575
Operating Segments
Segment Reporting Information [Line Items]
Interest income	2	8	8
Interest expense	$ 28	$ 38	$ 38

Segment Information - Revenue b

Segment Information - Revenue by Geographic Area (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 23,601	$ 32,917	$ 32,815
Operating Segments
Segment Reporting Information [Line Items]
Revenue	23,601	32,917	32,815
Operating Segments | North America
Segment Reporting Information [Line Items]
Revenue	5,478	10,446	11,730
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Revenue	3,472	4,544	4,013
Operating Segments | Europe/CIS/Africa
Segment Reporting Information [Line Items]
Revenue	5,963	7,682	7,113
Operating Segments | Middle East & Asia
Segment Reporting Information [Line Items]
Revenue	8,567	10,016	9,582
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	$ 121	$ 229	$ 377

Segment Information - Additiona

Segment Information - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 23,601	$ 32,917	$ 32,815
United States
Segment Reporting Information [Line Items]
Revenue	$ 4,500	$ 9,300	$ 10,100

Segment Information - Summary o

Segment Information - Summary of North America and International Revenue Disaggregated by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenue	$ 23,601	$ 32,917	$ 32,815
Operating Segments
Segment Reporting Information [Line Items]
Revenue	23,601	32,917	32,815
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	121	229	377
North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,478	10,446	11,730
International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	18,002	22,242	20,708
Digital Integration
Segment Reporting Information [Line Items]
Revenue	3,076	4,145	3,820
Digital Integration | Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,076	4,145	3,820
Digital Integration | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	7	8	140
Digital Integration | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	573	865	786
Digital Integration | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	2,496	3,272	2,894
Reservoir Performance
Segment Reporting Information [Line Items]
Revenue	5,602	9,299	10,050
Reservoir Performance | Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,602	9,299	10,050
Reservoir Performance | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	12	11	9
Reservoir Performance | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,547	3,779	4,975
Reservoir Performance | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,043	5,509	5,066
Well Construction
Segment Reporting Information [Line Items]
Revenue	8,605	11,880	11,310
Well Construction | Operating Segments
Segment Reporting Information [Line Items]
Revenue	8,605	11,880	11,310
Well Construction | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	196	257	316
Well Construction | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,453	2,814	2,911
Well Construction | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	6,956	8,809	8,083
Production Systems
Segment Reporting Information [Line Items]
Revenue	6,650	8,167	8,168
Production Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenue	6,650	8,167	8,168
Production Systems | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	27	55	63
Production Systems | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	1,921	3,053	3,139
Production Systems | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	4,702	5,059	4,966
Eliminations & Other
Segment Reporting Information [Line Items]
Revenue	(332)	(574)	(533)
Eliminations & Other | Eliminations & other
Segment Reporting Information [Line Items]
Revenue	(121)	(102)	(151)
Eliminations & Other | North America | Operating Segments
Segment Reporting Information [Line Items]
Revenue	(16)	(65)	(81)
Eliminations & Other | International | Operating Segments
Segment Reporting Information [Line Items]
Revenue	$ (195)	$ (407)	$ (301)

Segment Information - Fixed Ass

Segment Information - Fixed Assets Less Accumulated Depreciation by Geographic Area (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Fixed Assets less accumulated depreciation	$ 6,826	$ 9,270
Operating Segments | North America
Segment Reporting Information [Line Items]
Fixed Assets	1,588	3,326
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Fixed Assets	841	912
Operating Segments | Europe
Segment Reporting Information [Line Items]
Fixed Assets	1,840	2,309
Operating Segments | Middle East & Asia
Segment Reporting Information [Line Items]
Fixed Assets	2,353	2,502
Unallocated
Segment Reporting Information [Line Items]
Fixed Assets	$ 204	$ 221

Pension and Other Benefit Pla_3

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, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	3.30%
US
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.30%	4.30%	3.70%
Compensation increases	4.00%	4.00%	4.00%
Return on plan assets	6.60%	6.60%	7.25%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.27%	4.00%	3.55%
Compensation increases	4.82%	4.83%	4.81%
Return on plan assets	6.71%	7.22%	7.40%

Pension and Other Benefit Pla_4

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, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Curtailment gain	$ 69
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	31	$ 29	$ 32
Interest cost on projected benefit obligation	36	45	43
Expected return on plan assets	(70)	(64)	(63)
Amortization of prior service cost	(25)	(28)	(28)
Total pension cost	(97)	(18)	(16)
Curtailment gain	(69)
US
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	55	49	59
Interest cost on projected benefit obligation	148	180	167
Expected return on plan assets	(233)	(232)	(248)
Amortization of prior service cost	8	10	13
Amortization of net loss	41	29	47
Settlement charge		37
Total pension cost	19	73	38
International
Defined Benefit Plan Disclosure [Line Items]
Service cost - benefits earned during the period	140	112	138
Interest cost on projected benefit obligation	301	333	304
Expected return on plan assets	(591)	(592)	(584)
Amortization of prior service cost		7	10
Amortization of net loss	159	70	140
Total pension cost	$ 9	$ (70)	$ 8

Pension and Other Benefit Pla_5

Pension and Other Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Benefits Paid		$ 257
Non-cash settlement charge	$ 37	37
Fair value of excess of plan assets, projected benefit obligation		8,300
Projected benefit obligation plan assets		9,400
Accumulated benefit obligation plan assets		$ 9,100
Frequency of asset performance monitored, years		5 years
Expected contributions to postretirement benefit plans		$ 20
Impact of curtailment		$ (69)
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
Defined Benefit Plan Disclosure [Line Items]
Benefits Paid		$ 58	$ 60
Impact of curtailment		69
Asset (Unfunded Liability)	$ (8)	$ 122	$ (8)
Postretirement medical plan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Investment of assets in government and government-related debt securities under US postretirement medical plan		61.00%
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		39.00%
Postretirement medical plan | Impairment and Other
Defined Benefit Plan Disclosure [Line Items]
Impact of curtailment		$ 69

Pension and Other Benefit Pla_6

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, 2020	Dec. 31, 2019
US
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	3.30%
Compensation increases	4.00%	4.00%
International
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.38%	3.27%
Compensation increases	4.82%	4.83%

Pension and Other Benefit Pla_7

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, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in Plan Assets
Benefits paid	$ (257)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(1,049)	$ (967)
US
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	4,593	4,278
Service cost	55	49	$ 59
Interest cost	148	180	167
Actuarial losses	370	535
Settlement		(240)
Benefits paid	(226)	(209)
Projected benefit obligation at end of year	4,940	4,593	4,278
Change in Plan Assets
Plan assets at fair value at beginning of year	4,236	3,748
Actual return on plan assets	760	931
Company contributions	6	6
Settlement		(240)
Benefits paid	(226)	(209)
Plan assets at fair value at end of year	4,776	4,236	3,748
Unfunded Liability	(164)	(357)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(199)	(357)
Other Assets	35
Total of post retirement benefits	(164)	(357)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial losses	423	622
Prior service cost	1	9
Total amount recognized in accumulated other comprehensive income	424	631
Accumulated benefit obligation	4,739	4,345
International
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	9,647	8,111
Service cost	140	112	138
Interest cost	301	333	304
Contribution by plan participants	94	63
Actuarial losses	1,233	1,304
Currency effect	68	50
Settlement	(5)	(17)
Benefits paid	(338)	(309)
Projected benefit obligation at end of year	11,140	9,647	8,111
Change in Plan Assets
Plan assets at fair value at beginning of year	9,363	7,872
Actual return on plan assets	1,282	1,676
Currency effect	72	59
Company contributions	20	19
Contributions by plan participants	94	63
Settlement		(17)
Benefits paid	(338)	(309)
Plan assets at fair value at end of year	10,493	9,363	$ 7,872
Unfunded Liability	(647)	(284)
Amounts Recognized in Balance Sheet
Postretirement Benefits	(849)	(602)
Other Assets	202	318
Total of post retirement benefits	(647)	(284)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial losses	1,981	1,638
Total amount recognized in accumulated other comprehensive income	1,981	1,638
Accumulated benefit obligation	$ 10,844	$ 9,376

Pension and Other Benefit Pla_8

Pension and Other Benefit Plans - Weighted-Average Allocation of Plan Assets and Target Allocation by Asset Category (Detail)	Dec. 31, 2020	Dec. 31, 2019
US
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
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	15.00%	22.00%
Equity securities | US | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	20.00%
Equity securities | US | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	30.00%
Equity securities | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	43.00%	50.00%
Equity securities | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		47.00%
Equity securities | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		59.00%
Debt securities | US
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	76.00%	70.00%
Debt securities | US | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	63.00%
Debt securities | US | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	77.00%
Debt securities | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	36.00%	31.00%
Debt securities | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		27.00%
Debt securities | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		33.00%
Cash and cash equivalents | US
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	3.00%	2.00%
Cash and cash equivalents | US | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	0.00%
Cash and cash equivalents | US | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	3.00%
Cash and cash equivalents | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	4.00%	4.00%
Cash and cash equivalents | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		0.00%
Cash and cash equivalents | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		3.00%
Alternative investments | US
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	6.00%	6.00%
Alternative investments | US | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	5.00%
Alternative investments | US | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets	10.00%
Alternative investments | International
Defined Benefit Plan Disclosure [Line Items]
Target allocation of assets	17.00%	15.00%
Alternative investments | International | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		15.00%
Alternative investments | International | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation Percentage of Assets		22.00%

Pension and Other Benefit Pla_9

Pension and Other Benefit Plans - Fair Value of Schlumberger's Pension Plan Assets (Detail) - USD ($) $ in Millions		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		$ 4,776	$ 4,236	$ 3,748
International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		10,493	9,363	$ 7,872
Level One | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		930	948
Level One | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		4,436	4,241
Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		3,547	3,014
Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		4,316	3,683
Level Three | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		299	274
Level Three | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		1,741	1,439
Cash and cash equivalents | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		140	73
Cash and cash equivalents | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		457	351
Cash and cash equivalents | Level One | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		127	59
Cash and cash equivalents | Level One | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		215	166
Cash and cash equivalents | Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		13	14
Cash and cash equivalents | Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		242	185
Equity securities, US | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[1]	527	605
Equity securities, US | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[1]	2,797	2,834
Equity securities, US | Level One | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[1]	441	500
Equity securities, US | Level One | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[1]	2,393	2,347
Equity securities, US | Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[1]	86	105
Equity securities, US | Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[1]	404	487
Equity securities, International | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[2]	186	320
Equity securities, International | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[2]	1,711	1,871
Equity securities, International | Level One | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[2]	182	315
Equity securities, International | Level One | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[2]	1,615	1,723
Equity securities, International | Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[2]	4	5
Equity securities, International | Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[2]	96	148
Corporate bonds | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[3]	1,945	1,687
Corporate bonds | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[3]	1,260	1,105
Corporate bonds | Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[3]	1,945	1,687
Corporate bonds | Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[3]	1,260	1,105
Government and government-related debt securities | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[4]	1,658	1,256
Government and government-related debt securities | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[4]	2,405	1,602
Government and government-related debt securities | Level One | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[4]	180	74
Government and government-related debt securities | Level One | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[4]	213	5
Government and government-related debt securities | Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[4]	1,478	1,182
Government and government-related debt securities | Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[4]	2,192	1,597
Collateralized mortgage obligations and mortgage backed securities | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[5]	21	21
Collateralized mortgage obligations and mortgage backed securities | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[5]	122	161
Collateralized mortgage obligations and mortgage backed securities | Level Two | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[5]	21	21
Collateralized mortgage obligations and mortgage backed securities | Level Two | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[5]	122	161
Private equity | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[6]	204	181
Private equity | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[6]	851	623
Private equity | Level Three | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[6]	204	181
Private equity | Level Three | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[6]	851	623
Real estate | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[7]	95	93
Real estate | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[7]	200	183
Real estate | Level Three | US
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[7]	95	93
Real estate | Level Three | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value	[7]	200	183
Other | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		690	633
Other | Level Three | International
Defined Benefit Plan Disclosure [Line Items]
Plan assets at fair value		$ 690	$ 633
[1]	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.
[2]	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.
[3]	Corporate bonds consist primarily of investment grade bonds from diversified industries.
[4]	Government and government-related debt securities are comprised primarily of inflation-protected US treasuries and, to a lesser extent, other government-related securities.
[5]	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.
[6]	Private equity includes investments in several funds of funds.
[7]	Real estate primarily includes investments in real estate limited partnerships, concentrated in commercial real estate.

Pension and Other Benefit Pl_10

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, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	3.30%
Current medical cost trend rate	7.25%	7.50%
Ultimate medical cost trend rate	4.50%	4.50%
Year that the rate reaches the ultimate trend rate	2031	2031
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.30%	4.30%	3.70%
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	4.50%	4.50%	5.00%
Year that the rate reaches the ultimate trend rate	2031	2031	2026

Pension and Other Benefit Pl_11

Pension and Other Benefit Plans - Changes in Accumulated Postretirement Benefit Obligation, Plan Assets and Funded Status (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Change in Plan Assets
Benefits paid	$ (257)
Postretirement medical plan
Change in Projected Benefit Obligations
Projected benefit obligation at beginning of year	1,193	$ 1,106
Service cost	31	29	$ 32
Interest cost	36	45	43
Contribution by plan participants	8	8
Actuarial losses	64	65
Benefits paid	(58)	(60)
Curtailment	(40)
Projected benefit obligation at end of year	1,234	1,193	1,106
Change in Plan Assets
Plan assets at fair value at beginning of year	1,185	997
Actual return on plan assets	221	240
Contributions by plan participants	8	8
Benefits paid	(58)	(60)
Plan assets at fair value at end of year	1,356	1,185	$ 997
Asset (Unfunded Liability)	122	(8)
Amounts Recognized in Accumulated Other Comprehensive Loss
Actuarial losses	(186)	(98)
Prior service credit	(104)	(158)
Total amount recognized in accumulated other comprehensive income	$ (290)	$ (256)

Pension and Other Benefit Pl_12

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, 2020USD ($)
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
2021	$ 56
2022	56
2023	56
2024	56
2025	57
2026-2030	297
US
Defined Benefit Plan Disclosure [Line Items]
2021	235
2022	235
2023	236
2024	237
2025	237
2026-2030	1,193
International
Defined Benefit Plan Disclosure [Line Items]
2021	349
2022	359
2023	370
2024	381
2025	385
2026-2030	$ 2,146

Supplementary Information - Cas

Supplementary Information - Cash Paid (Refunded) for Interest and Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting [Abstract]
Interest	$ 598	$ 558	$ 592
Income tax	$ 582	$ 739	$ 628

Supplementary Information - Int

Supplementary Information - Interest and Other Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting [Abstract]
Earnings of equity method investments	$ 91	$ 45	$ 89
Interest income	33	41	60
Unrealized gain on marketable securities	39
Interest and other income, net	$ 163	$ 86	$ 149

Supplementary Information - Cha

Supplementary Information - Change in Allowance for Doubtful Accounts (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting [Abstract]
Balance at beginning of year	$ 255	$ 249	$ 241
Additions	58	5	15
Amounts written off	(12)	1	(7)
Balance at end of year	$ 301	$ 255	$ 249

Supplementary Information - Add

Supplementary Information - Additional Information (Detail) - USD ($) $ in Billions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Revenue in excess of billings	$ 0.2	$ 0.2

Supplementary Information - Acc

Supplementary Information - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Trade	$ 2,937	$ 4,790
Payroll, vacation and employee benefits	1,524	1,445
Billings and cash collections in excess of revenue	941	910
Other	3,040	3,518
Accounts payable and accrued liabilities	$ 8,442	$ 10,663