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Document and Entity Information	9 Months Ended
Document and Entity Information	Sep. 30, 2018 shares
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Trading Symbol	SLB
Entity Registrant Name	SCHLUMBERGER LIMITED/NV
Entity Central Index Key	0000087347
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	1,384,801,810
Entity Small Business	false
Entity Emerging Growth Company	false

CONSOLIDATED STATEMENT OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue
Total Revenue	$ 8,504	$ 7,905	$ 24,636	$ 22,261
Interest & other income	36	64	118	172
Expenses
Research & engineering	177	189	524	595
General & administrative	105	115	330	323
Impairments & other			184	510
Merger & integration		49		213
Interest	147	142	434	422
Income before taxes	787	677	1,976	1,027
Tax expense	129	121	348	269
Net income	658	556	1,628	758
Net income attributable to noncontrolling interests	14	11	29	9
Net income attributable to Schlumberger	$ 644	$ 545	$ 1,599	$ 749
Basic earnings per share of Schlumberger	$ 0.46	$ 0.39	$ 1.15	$ 0.54
Diluted earnings per share of Schlumberger	$ 0.46	$ 0.39	$ 1.15	$ 0.54
Average shares outstanding:
Basic	1,385	1,385	1,385	1,388
Assuming dilution	1,392	1,392	1,393	1,395
Services
Revenue
Total Revenue	$ 6,345	$ 5,763	$ 18,222	$ 15,928
Expenses
Cost of services and sales	5,336	4,816	15,414	13,507
Product
Revenue
Total Revenue	2,159	2,142	6,414	6,333
Expenses
Cost of services and sales	$ 1,988	$ 1,981	$ 5,892	$ 5,836

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 658	$ 556	$ 1,628	$ 758
Currency translation adjustments
Unrealized net change arising during the period	(47)	75	(128)	49
Marketable securities
Unrealized loss arising during the period	(12)	(41)	(33)	(66)
Cash flow hedges
Net gain (loss) on cash flow hedges	4	8	(6)	19
Reclassification to net income of net realized (gain) loss	2	(4)	(2)	4
Pension and other postretirement benefit plans
Amortization to net income of net actuarial loss	47	40	141	119
Amortization to net income of net prior service (credit) cost	(1)	20	(4)	60
Income taxes on pension and other postretirement benefit plans	(2)		(7)	(2)
Comprehensive income	649	654	1,589	941
Comprehensive income attributable to noncontrolling interests	14	11	29	9
Comprehensive income attributable to Schlumberger	$ 635	$ 643	$ 1,560	$ 932

CONSOLIDATED BALANCE SHEET - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current Assets
Cash	$ 1,493	$ 1,799
Short-term investments	1,361	3,290
Receivables less allowance for doubtful accounts (2018 - $245; 2017 - $241)	8,409	8,084
Inventories	4,108	4,046
Other current assets	1,112	1,278
Current assets total	16,483	18,497
Investments in Affiliated Companies	1,497	1,519
Fixed Assets less accumulated depreciation	11,739	11,576
Multiclient Seismic Data	639	727
Goodwill	25,134	25,118
Intangible Assets	8,930	9,354
Other Assets	5,624	5,196
Total Assets	70,046	71,987
Current Liabilities
Accounts payable and accrued liabilities	9,419	10,036
Estimated liability for taxes on income	1,265	1,223
Short-term borrowings and current portion of long-term debt	3,215	3,324
Dividends payable	701	699
Current Liabilities Total	14,600	15,282
Long-term Debt	14,159	14,875
Postretirement Benefits	957	1,082
Deferred Taxes	1,529	1,650
Other Liabilities	1,853	1,837
Total Liabilities	33,098	34,726
Equity
Common stock	13,058	12,975
Treasury stock	(3,924)	(4,049)
Retained earnings	31,712	32,190
Accumulated other comprehensive loss	(4,313)	(4,274)
Schlumberger stockholders' equity	36,533	36,842
Noncontrolling interests	415	419
Total equity	36,948	37,261
Liabilities and stockholders equity	$ 70,046	$ 71,987

CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts on receivable	$ 245	$ 241

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

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Cash flows from operating activities:

Net income

$ 1,628

$ 758

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

Impairments and other charges

184

723

Depreciation and amortization

^[1]

2,637

2,931

Stock-based compensation expense

259

261

Pension and other postretirement benefits funding

(69)

(107)

Earnings of equity method investments, less dividends received

(41)

(52)

Change in assets and liabilities:

Increase in receivables

^[2]

(114)

(1,049)

(Increase) decrease in inventories

^[2]

(68)

Decrease (increase) in other current assets

^[2]

(86)

(Increase) decrease in other assets

^[2]

(167)

202

Decrease in accounts payable and accrued liabilities

^[2]

(1,011)

(533)

(Decrease) increase in estimated liability for taxes on income

^[2]

(32)

181

Decrease in other liabilities

^[2]

(6)

(74)

Other

^[2]

104

243

NET CASH PROVIDED BY OPERATING ACTIVITIES

3,382

3,412

Cash flows from investing activities:

Capital expenditures

(1,539)

(1,482)

SPM investments

(719)

(492)

Multiclient seismic data costs capitalized

(63)

(223)

Business acquisitions and investments, net of cash acquired

(290)

(382)

Sale of investments, net

1,922

3,310

Other

(36)

(92)

NET CASH (USED IN) PROVIDED BY INVESTING ACTIVITIES

(725)

639

Cash flows from financing activities:

Dividends paid

(2,077)

(2,086)

Proceeds from employee stock purchase plan

227

212

Proceeds from exercise of stock options

Stock repurchase program

(300)

(868)

Proceeds from issuance of long-term debt

220

681

Repayment of long-term debt

(900)

(2,206)

Net decrease in short-term borrowings

(103)

(1,110)

Other

(47)

NET CASH USED IN FINANCING ACTIVITIES

(2,951)

(5,311)

Net decrease in cash before translation effect

(294)

(1,260)

Translation effect on cash

(12)

Cash, beginning of period

1,799

2,929

Cash, end of period

$ 1,493

$ 1,690

[1]	Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.
[2]	Net of the effect of business acquisitions.

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - 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, 2016	$ 41,529	$ 12,801	$ (3,550)	$ 36,470	$ (4,643)	$ 451
Net income	758			749		9
Currency translation adjustments	49				49
Changes in unrealized gain on marketable securities	(66)				(66)
Changes in fair value of cash flow hedges	23				23
Pension and other postretirement benefit plans	177				177
Shares sold to optionees, less shares exchanged	49	(39)	88
Vesting of restricted stock		(98)	98
Shares issued under employee stock purchase plan	212	(52)	264
Stock repurchase program	(868)		(868)
Stock-based compensation expense	261	261
Dividends declared	(2,083)			(2,083)
Other	(31)	(10)	2			(23)
Balance at Sep. 30, 2017	40,010	12,863	(3,966)	35,136	(4,460)	437
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	$ 1,628			1,599		29
Currency translation adjustments	(132)				(128)	(4)
Changes in unrealized gain on marketable securities	(33)				(33)
Changes in fair value of cash flow hedges	(8)				(8)
Pension and other postretirement benefit plans	130				130
Shares sold to optionees, less shares exchanged	$ 29	$ (37)	66
Vesting of restricted stock		(63)	$ 63
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	4		4
Stock repurchase program	$ (300)		$ (300)
Stock repurchase program, shares	(4)		(4)
Stock-based compensation expense	$ 259	259
Dividends declared	(2,077)			(2,077)
Other	(36)	(9)	$ 2			(29)
Balance at Sep. 30, 2018	$ 36,948	$ 13,058	$ (3,924)	$ 31,712	$ (4,313)	$ 415
Balance, shares at Sep. 30, 2018	1,385	1,434
Treasury shares, Balance at Sep. 30, 2018	(49)

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) (Unaudited) - $ / shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Retained Earnings
Dividends declared, per share	$ 1.50	$ 1.50

Basis of Presentation	9 Months Ended
Basis of Presentation	Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation The accompanying unaudited consolidated financial statements of Schlumberger Limited and its subsidiaries (“Schlumberger”) have been prepared in accordance with generally accepted accounting principles in the United States of America for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of Schlumberger management, all adjustments considered necessary for a fair statement have been included in the accompanying unaudited financial statements. All intercompany transactions and balances have been eliminated in consolidation. Operating results for the nine-month period ended September 30, 2018 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2018. The December 31, 2017 balance sheet information has been derived from the Schlumberger 2017 audited financial statements. For further information, refer to the Consolidated Financial Statements and notes thereto included in the Schlumberger Annual Report on Form 10-K for the year ended December 31, 2017, filed with the Securities and Exchange Commission on January 24, 2018. Recently Adopted Accounting Pronouncement In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers. This ASU amended the existing accounting standards for revenue recognition and requires companies to recognize revenue when control of the promised goods or services is transferred to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. Schlumberger adopted this ASU on January 1, 2018 using the modified retrospective transition method applied to those contracts which were not completed as of January 1, 2018. Prior period amounts have not been adjusted and continue to be reflected in accordance with Schlumberger’s historical accounting. The adoption of this ASU did not have a material impact on Schlumberger’s 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 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. Revenue in excess of billings related to contracts where revenue is recognized over time was $0.2 billion at September 30, 2018 and $0.3 billion at December 31, 2017. Such amounts are included within Receivables less allowance for doubtful accounts in the Consolidated Balance Sheet. Due to the nature of its business, Schlumberger does not have significant backlog. Total backlog was $2.5 billion at September 30, 2018, of which approximately 59% is expected to be recognized as revenue over the next 12 months. Billings and cash collections in excess of revenue was $0.8 billion at both September 30, 2018 and December 31, 2017. Such amounts are included within Accounts payable and accrued liabilities in the Consolidated Balance Sheet. Recently Issued Accounting Pronouncement In February 2016, the FASB issued ASU No. 2016-02, Leases. This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. This ASU is effective for Schlumberger on January 1, 2019, with early adoption permitted. Based on its current lease portfolio, Schlumberger estimates that the adoption of this ASU will result in approximately $1.2 billion of additional assets and liabilities being reflected on its Consolidated Balance Sheet.

Charges and Credits

9 Months Ended

Sep. 30, 2018

Restructuring And Related Activities [Abstract]

Charges and Credits

2. Charges and Credits

2018

There were no charges or credits recorded during the first and third quarters of 2018.

During the second quarter of 2018, Schlumberger recorded a $184 million pretax charge ($164 million after-tax) associated with headcount reductions, primarily to further streamline its support cost structure. This charge is classified in Impairments & other in the Consolidated Statement of Income.

2017

Schlumberger recorded the following charges and credits during the first nine months of 2017:

Third quarter of 2017:

•

In connection with Schlumberger’s 2016 acquisition of Cameron International Corporation (“Cameron”), Schlumberger recorded $49 million of charges consisting of employee benefits, facility consolidation and other merger and integration-related costs. These charges are classified in Merger & integration in the Consolidated Statement of Income.

Second quarter of 2017:

•

During the second quarter of 2017, Schlumberger entered into a financing agreement with its primary customer in Venezuela. This agreement resulted in the exchange of $700 million of outstanding accounts receivable for a promissory note with a three-year term that bears interest at the rate of 6.50% per annum. Schlumberger recorded this note at its estimated fair value on the date of the exchange, which resulted in a charge of $460 million. Schlumberger is accounting for the promissory note as an available-for-sale security reported at fair value in Other Assets, with unrealized gains and losses included as a component of Accumulated other comprehensive loss. The fair value of the promissory notes was based on management’s estimate of pricing assumptions that market participants would use.

During the second quarter of 2017, Schlumberger also entered into discussions with another customer relating to certain of its outstanding accounts receivable. As a result of those discussions, Schlumberger recorded a charge of $50 million to adjust these receivables to their estimated net realizable value.

These charges are classified in Impairments & other in the Consolidated Statement of Income.

•

In connection with Schlumberger’s 2016 acquisition of Cameron, Schlumberger recorded $81 million of charges consisting of employee benefits, facility consolidation and other merger and integration-related costs. These charges are classified in Merger & integration in the Consolidated Statement of Income.

First quarter of 2017:

•

In connection with Schlumberger’s acquisition of Cameron, Schlumberger recorded $82 million of charges during the first quarter of 2017 relating to employee benefits, facility closures and other merger and integration-related costs. These charges are classified in Merger & integration in the Consolidated Statement of Income.

The following is a summary of the charges and credits recorded during the first nine months of 2017:

	(Stated in millions)

					Noncontrolling
	Pretax		Tax		Interests		Net
Promissory note fair value adjustment and other	$	510	$	-	$	12	$	498
Merger & integration		213		44		-		169
	$	723	$	44	$	12	$	667

•

On December 22, 2017, the US enacted the Tax Cuts and Jobs Act (the “Act”). The Act, which is also commonly referred to as “US tax reform,” significantly changed US corporate income tax laws by, among other things, reducing the US corporate income tax rate to 21% starting in 2018 and creating a territorial tax system with a one-time mandatory tax on previously deferred foreign earnings of US subsidiaries. As a result, Schlumberger recorded a net charge of $76 million during the fourth quarter of 2017. This amount consisted of two components: (i) a $410 million charge relating to the one-time mandatory tax on previously deferred earnings of certain non-US subsidiaries that are owned either wholly or partially by a US subsidiary of Schlumberger, and (ii) a $334 million credit resulting from the remeasurement of Schlumberger’s net deferred tax liabilities in the US based on the new lower corporate income tax rate.

Although the $76 million net charge represents a reasonable estimate of the impact of the income tax effects of the Act on Schlumberger’s Consolidated Financial Statements as of December 31, 2017, it should be considered provisional. Once Schlumberger finalizes certain tax positions, it will be able to conclude whether any further adjustments are required. Any adjustments to these provisional amounts will be reported as a component of Taxes on income in the reporting period in which any such adjustments are determined, which will be no later than the fourth quarter of 2018.

Earnings Per Share

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Earnings Per Share

3. Earnings Per Share

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

(Stated in millions, except per share amounts)

	2018						2017
	Schlumberger Net Income		Average Shares Outstanding		Earnings per Share		Schlumberger Net Income		Average Shares Outstanding		Earnings per Share
Third Quarter
Basic	$	644		1,385	$	0.46	$	545		1,385	$	0.39
Assumed exercise of stock options		-		-				-		1
Unvested restricted stock		-		7				-		6
Diluted	$	644		1,392	$	0.46	$	545		1,392	$	0.39


	2018						2017
	Schlumberger Net Income		Average Shares Outstanding		Earnings per Share		Schlumberger Net Income		Average Shares Outstanding		Earnings per Share
Nine Months
Basic	$	1,599	$	1,385	$	1.15	$	749	$	1,388	$	0.54
Assumed exercise of stock options		-		1				-		2
Unvested restricted stock		-		7				-		5
Diluted	$	1,599	$	1,393	$	1.15	$	749	$	1,395	$	0.54

The number of outstanding options to purchase shares of Schlumberger common stock that were not included in the computation of diluted earnings per share, because to do so would have had an antidilutive effect, was as follows:

(Stated in millions)

	2018		2017
Third Quarter		40		43
Nine Months		40		30

Inventories

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Inventories

4. Inventories

A summary of inventories, which are stated at the lower of average cost or net realizable value, follows:

(Stated in millions)

	Sept. 30,		Dec. 31,
	2018		2017
Raw materials & field materials	$	1,885	$	1,846
Work in progress		541		503
Finished goods		1,682		1,697
	$	4,108	$	4,046

Fixed Assets

9 Months Ended

Sep. 30, 2018

Property Plant And Equipment [Abstract]

Fixed Assets

5. Fixed Assets

A summary of fixed assets follows:

(Stated in millions)

	Sept. 30,		Dec. 31,
	2018		2017
Property, plant & equipment	$	38,695	$	37,813
Less: Accumulated depreciation		26,956		26,237
	$	11,739	$	11,576

Depreciation expense relating to fixed assets was as follows:

(Stated in millions)

	2018		2017
Third Quarter	$	516	$	591
Nine Months	$	1,564	$	1,796

Multiclient Seismic Data

9 Months Ended

Sep. 30, 2018

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data

6. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the nine months ended September 30, 2018 was as follows:

(Stated in millions)

Balance at December 31, 2017	$	727
Capitalized in period		63
Charged to expense		(151	)
Balance at September 30, 2018	$	639

Intangible Assets

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Intangible Assets

7. Intangible Assets

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

	(Stated in millions)

	Sept. 30, 2018						Dec. 31, 2017
	Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Book Value		Amortization		Value		Book Value		Amortization		Value
Customer relationships	$	4,775	$	1,187	$	3,588	$	4,832	$	1,020	$	3,812
Technology/technical know-how		3,578		1,197		2,381		3,634		1,078		2,556
Tradenames		2,806		609		2,197		2,806		533		2,273
Other		1,362		598		764		1,295		582		713
	$	12,521	$	3,591	$	8,930	$	12,567	$	3,213	$	9,354

Amortization expense charged to income was as follows:

(Stated in millions)

	2018		2017
Third Quarter	$	167	$	165
Nine Months	$	506	$	501

Based on the net book value of intangible assets at September 30, 2018, amortization charged to income for the subsequent five years is estimated to be: fourth quarter of 2018—$169 million; 2019—$680 million; 2020—$648 million; 2021—$617 million; 2022—$609 million; and 2023—$594 million.

Long-term Debt

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Long-term Debt

8. Long-term Debt

A summary of Long-term Debt follows:

(Stated in millions)

	Sept. 30,		Dec. 31,
	2018		2017
4.00% Senior Notes due 2025	$	1,742	$	1,741
3.30% Senior Notes due 2021		1,596		1,595
3.00% Senior Notes due 2020		1,595		1,593
3.65% Senior Notes due 2023		1,493		1,492
4.20% Senior Notes due 2021		1,100		1,100
2.40% Senior Notes due 2022		997		996
3.63% Senior Notes due 2022		847		846
2.65% Senior Notes due 2022		598		598
2.20% Senior Notes due 2020		498		498
7.00% Notes due 2038		211		212
4.50% Notes due 2021		133		135
5.95% Notes due 2041		115		115
3.60% Notes due 2022		109		110
5.13% Notes due 2043		99		99
4.00% Notes due 2023		82		82
3.70% Notes due 2024		55		56
0.63% Guaranteed Notes due 2019		-		712
1.50% Guaranteed Notes due 2019		-		603
Commercial paper borrowings		2,600		1,694
Other		289		598
	$	14,159	$	14,875

The estimated fair value of Schlumberger’s Long-term Debt, based on quoted market prices at September 30, 2018 and December 31, 2017, was $14.1 billion and $15.2 billion, respectively.

Borrowings under Schlumberger’s commercial paper programs at September 30, 2018 were $3.1 billion, of which $0.5 billion was classified in Short-term borrowings and current portion of long-term debt in the Consolidated Balance Sheet. At December 31, 2017, borrowings under the commercial paper programs were $3.0 billion, of which $1.3 billion was classified in Short-term borrowings and current portion of long-term debt in the Consolidated Balance Sheet.

Derivative Instruments and Hedging Activities

9 Months Ended

Sep. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative Instruments and Hedging Activities

9. Derivative Instruments and Hedging Activities

Schlumberger is exposed to market risks related to fluctuations in foreign currency exchange rates and interest rates. To mitigate these risks, Schlumberger utilizes derivative instruments. Schlumberger does not enter into derivative transactions for speculative purposes.

Interest Rate Risk

Schlumberger is subject to interest rate risk on its debt and its investment portfolio. Schlumberger maintains an interest rate risk management strategy that uses a mix of variable and fixed rate debt combined with its investment portfolio, and occasionally interest rate swaps, to mitigate the exposure to changes in interest rates.

During 2013, Schlumberger entered into a cross-currency swap for a notional amount of €0.5 billion in order to hedge changes in the fair value of Schlumberger’s €0.5 billion 1.50% Guaranteed Notes due 2019. Under the terms of this swap, Schlumberger will receive interest at a fixed rate of 1.50% on the euro notional amount and pay interest at a floating rate of three-month LIBOR plus approximately 64 basis points on the US dollar notional amount.

This cross-currency swap is designated as a fair value hedge of the underlying debt and is marked to market, with gains and losses recognized immediately in income to largely offset the effects on changes in the fair value of the hedged debt.

During 2017, a Canadian dollar functional currency subsidiary of Schlumberger issued $1.1 billion of US dollar denominated debt. Schlumberger entered into cross-currency swaps for an aggregate notional amount of $1.1 billion in order to hedge changes in the fair value of its $0.5 billion 2.20% Senior Notes due 2020 and its $0.6 billion 2.65% Senior Notes due 2022. These cross-currency swaps effectively convert the US dollar notes to Canadian dollar denominated debt with fixed annual interest rates of 1.97% and 2.52%, respectively.

These cross-currency swaps are designated as cash flow hedges. The changes in the fair values of the hedges are recorded on the Consolidated Balance Sheet and in Accumulated Other Comprehensive Loss. Amounts recorded in Accumulated Other Comprehensive Loss are reclassified to earnings in the same periods that the underlying hedged item is recognized in earnings.

At September 30, 2018, Schlumberger had fixed rate debt aggregating $13.3 billion and variable rate debt aggregating $4.1 billion, after taking into account the effect of interest rate swaps.

Short-term investments were $1.4 billion at September 30, 2018. The carrying value of these investments approximated fair value.

Foreign Currency Exchange Rate Risk

As a multinational company, Schlumberger conducts its business in more than 85 countries. Schlumberger’s functional currency is primarily the US dollar. However, outside the United States, a significant portion of Schlumberger’s expenses is incurred in foreign currencies. Therefore, when the US dollar weakens (strengthens) in relation to the foreign currencies of the countries in which Schlumberger conducts business, the US dollar-reported expenses will increase (decrease).

Schlumberger is exposed to risks on future cash flows to the extent that the local currency is not the functional currency and expenses denominated in local currency are not equal to revenues denominated in local currency. Schlumberger is also exposed to risks on future cash flows relating to certain of its fixed rate debt denominated in currencies other than the functional currency. Schlumberger uses foreign currency forward contracts to provide a hedge against a portion of these cash flow risks. These contracts are accounted for as cash flow hedges, with the changes in the fair value of the hedge recorded on the Consolidated Balance Sheet and in Accumulated Other Comprehensive Loss. Amounts recorded in Accumulated Other Comprehensive Loss are reclassified into earnings in the same period or periods that the hedged item is recognized in earnings.

At September 30, 2018, Schlumberger recognized a cumulative net $5 million loss in Accumulated Other Comprehensive Loss relating to revaluation of foreign currency forward contracts designated as cash flow hedges, the majority of which is expected to be reclassified into earnings within the next 12 months.

Schlumberger is exposed to changes in the fair value of assets and liabilities that are denominated in currencies other than the functional currency. While Schlumberger uses foreign currency forward contracts and foreign currency options to economically hedge this exposure as it relates to certain currencies, these contracts are not designated as hedges for accounting purposes. Instead, the fair value of the contracts is recorded on the Consolidated Balance Sheet, and changes in the fair value are recognized in the Consolidated Statement of Income as are changes in fair value of the hedged item.

At September 30, 2018, contracts were outstanding for the US dollar equivalent of $5.0 billion in various foreign currencies, of which $1.9 billion relates to hedges of debt denominated in currencies other than the functional currency.

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

							(Stated in millions)

	Gain (Loss) Recognized in Income
	Third Quarter						Nine Months
	2018			2017			2018			2017			Consolidated Statement of Income Classification
Derivatives designated as fair value hedges:
Cross currency swap	$	6		$	19		$	(6	)	$	66		Interest expense

Derivatives designated as cash flow hedges:
Foreign exchange contracts	$	(2	)	$	-		$	3		$	-		Cost of services/sales
Cross currency swap		(30	)		-			25			-		Interest expense
	$	(32	)	$	-		$	28		$	-
Derivatives not designated as hedges:
Foreign exchange contracts	$	(17	)	$	(10	)	$	15		$	(3	)	Cost of services/sales

Contingencies	9 Months Ended
Contingencies	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Contingencies	10. 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

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Segment Information

11. Segment Information

				(Stated in millions)

	Third Quarter 2018						Third Quarter 2017
				Income						Income
				Before						Before
	Revenue			Taxes			Revenue			Taxes
Reservoir Characterization	$	1,673		$	373		$	1,771		$	311
Drilling		2,429			339			2,120			301
Production		3,252			320			2,876			283
Cameron		1,298			148			1,297			194
Eliminations & other		(148	)		(28	)		(159	)		(30	)
Pretax operating income					1,152						1,059
Corporate & other ⁽¹⁾					(234	)					(234	)
Interest income ⁽²⁾					8						30
Interest expense ⁽³⁾					(139	)					(129	)
Charges and credits ⁽⁴⁾					-						(49	)
	$	8,504		$	787		$	7,905		$	677

⁽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 ($2 million in 2018; $4 million in 2017).

⁽³⁾ Interest expense excludes amounts which are included in the segments’ income ($8 million in 2018; $13 million in 2017).

⁽⁴⁾ See Note 2 – Charges and Credits.

				(Stated in millions)

	Nine Months 2018						Nine Months 2017
				Income						Income
				Before						Before
	Revenue			Taxes			Revenue			Taxes
Reservoir Characterization	$	4,865		$	1,030		$	5,148		$	891
Drilling		6,789			921			6,212			832
Production		9,468			851			7,559			614
Cameron		3,902			481			3,791			530
Eliminations & other		(388	)		(63	)		(449	)		(101	)
Pretax operating income					3,220						2,766
Corporate & other ⁽¹⁾					(699	)					(715	)
Interest income ⁽²⁾					44						82
Interest expense ⁽³⁾					(405	)					(383	)
Charges and credits ⁽⁴⁾					(184	)					(723	)
	$	24,636		$	1,976		$	22,261		$	1,027

⁽²⁾ Interest income excludes amounts which are included in the segments’ income ($7 million in 2018; $15 million in 2017).

⁽³⁾ Interest expense excludes amounts which are included in the segments’ income ($29 million in 2018; $39 million in 2017).

⁽⁴⁾ See Note 2 – Charges and Credits.

Revenue by geographic area was as follows:

					(Stated in millions)

	Third Quarter				Nine Months
	2018		2017		2018		2017
North America	$	3,189	$	2,602	$	9,164	$	6,675
Latin America		978		952		2,767		2,942
Europe/CIS/Africa		1,820		1,843		5,316		5,255
Middle East & Asia		2,417		2,352		7,079		7,007
Eliminations & other		100		156		310		382
	$	8,504	$	7,905	$	24,636	$	22,261

North America and International revenue disaggregated by segment was as follows:

						(Stated in millions)

	Third Quarter 2018
	North					Eliminations
	America		International			& other			Total
Reservoir Characterization	$	242	$	1,317		$	114		$	1,673
Drilling		601		1,760			68			2,429
Production		1,725		1,527			-			3,252
Cameron		617		656			25			1,298
Other		4		(45	)		(107	)		(148	)
	$	3,189	$	5,215		$	100		$	8,504


	Nine Months 2018
	North					Eliminations
	America		International			& other			Total
Reservoir Characterization	$	733	$	3,747		$	385		$	4,865
Drilling		1,733		4,884			172			6,789
Production		4,919		4,545			4			9,468
Cameron		1,761		2,070			71			3,902
Other		18		(84	)		(322	)		(388	)
	$	9,164	$	15,162		$	310		$	24,636

Pension and Other Postretirement Benefit Plans

9 Months Ended

Sep. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefit Plans

12. Pension and Other Postretirement Benefit Plans

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

(Stated in millions)

	Third Quarter												Nine Months
	2018						2017						2018						2017
	US			Int'l			US			Int'l			US			Int'l			US			Int'l
Service cost	$	14		$	35		$	14		$	24		$	44		$	105		$	44		$	71
Interest cost		41			77			44			76			125			229			131			230
Expected return on plan assets		(61	)		(149	)		(60	)		(135	)		(186	)		(442	)		(181	)		(406	)
Amortization of prior service cost		3			3			3			24			9			8			9			73
Amortization of net loss		12			35			10			30			36			105			29			90
	$	9		$	1		$	11		$	19		$	28		$	5		$	32		$	58

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

(Stated in millions)

	Third Quarter						Nine Months
	2018			2017			2018			2017
Service cost	$	8		$	7		$	24		$	22
Interest cost		11			12			33			35
Expected return on plan assets		(15	)		(16	)		(47	)		(46	)
Amortization of prior service credit		(7	)		(7	)		(21	)		(22	)
	$	(3	)	$	(4	)	$	(11	)	$	(11	)

Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2018

Equity [Abstract]

Accumulated Other Comprehensive Loss

13. 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	)
Other comprehensive loss before reclassifications		(128	)		(33	)		(6	)		-			(167	)
Amounts reclassified from accumulated other comprehensive loss		-			-			(2	)		130			128
Net other comprehensive income		(128	)		(33	)		(8	)		130			(39	)
Balance, September 30, 2018	$	(2,267	)	$	(20	)	$	(5	)	$	(2,021	)	$	(4,313	)


										Pension and
	Currency									Other
	Translation			Marketable			Cash Flow			Postretirement
	Adjustments			Securities			Hedges			Benefit Plans			Total
Balance, January 1, 2017	$	(2,136	)	$	21		$	(19	)	$	(2,509	)	$	(4,643	)
Other comprehensive gain (loss) before reclassifications		49			(66	)		19			-			2
Amounts reclassified from accumulated other comprehensive loss		-			-			4			179			183
Income taxes											(2	)		(2	)
Net other comprehensive income		49			(66	)		23			177			183
Balance, September 30, 2017	$	(2,087	)	$	(45	)	$	4		$	(2,332	)	$	(4,460	)

Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Recently Adopted Accounting Pronouncement	Recently Adopted Accounting Pronouncement In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers. This ASU amended the existing accounting standards for revenue recognition and requires companies to recognize revenue when control of the promised goods or services is transferred to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. Schlumberger adopted this ASU on January 1, 2018 using the modified retrospective transition method applied to those contracts which were not completed as of January 1, 2018. Prior period amounts have not been adjusted and continue to be reflected in accordance with Schlumberger’s historical accounting. The adoption of this ASU did not have a material impact on Schlumberger’s 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 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. Revenue in excess of billings related to contracts where revenue is recognized over time was $0.2 billion at September 30, 2018 and $0.3 billion at December 31, 2017. Such amounts are included within Receivables less allowance for doubtful accounts in the Consolidated Balance Sheet. Due to the nature of its business, Schlumberger does not have significant backlog. Total backlog was $2.5 billion at September 30, 2018, of which approximately 59% is expected to be recognized as revenue over the next 12 months. Billings and cash collections in excess of revenue was $0.8 billion at both September 30, 2018 and December 31, 2017. Such amounts are included within Accounts payable and accrued liabilities in the Consolidated Balance Sheet.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncement In February 2016, the FASB issued ASU No. 2016-02, Leases. This ASU requires lessees to recognize a right of use asset and lease liability on the balance sheet for all leases, with the exception of short-term leases. This ASU is effective for Schlumberger on January 1, 2019, with early adoption permitted. Based on its current lease portfolio, Schlumberger estimates that the adoption of this ASU will result in approximately $1.2 billion of additional assets and liabilities being reflected on its Consolidated Balance Sheet.

Charges and Credits (Tables)

9 Months Ended

Sep. 30, 2018

Restructuring And Related Activities [Abstract]

Summary of Charges and Credits

The following is a summary of the charges and credits recorded during the first nine months of 2017:

	(Stated in millions)

					Noncontrolling
	Pretax		Tax		Interests		Net
Promissory note fair value adjustment and other	$	510	$	-	$	12	$	498
Merger & integration		213		44		-		169
	$	723	$	44	$	12	$	667

Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Reconciliation of Earnings Per Share

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

(Stated in millions, except per share amounts)

	2018						2017
	Schlumberger Net Income		Average Shares Outstanding		Earnings per Share		Schlumberger Net Income		Average Shares Outstanding		Earnings per Share
Third Quarter
Basic	$	644		1,385	$	0.46	$	545		1,385	$	0.39
Assumed exercise of stock options		-		-				-		1
Unvested restricted stock		-		7				-		6
Diluted	$	644		1,392	$	0.46	$	545		1,392	$	0.39


	2018						2017
	Schlumberger Net Income		Average Shares Outstanding		Earnings per Share		Schlumberger Net Income		Average Shares Outstanding		Earnings per Share
Nine Months
Basic	$	1,599	$	1,385	$	1.15	$	749	$	1,388	$	0.54
Assumed exercise of stock options		-		1				-		2
Unvested restricted stock		-		7				-		5
Diluted	$	1,599	$	1,393	$	1.15	$	749	$	1,395	$	0.54

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

(Stated in millions)

	2018		2017
Third Quarter		40		43
Nine Months		40		30

Inventories (Tables)

9 Months Ended

Sep. 30, 2018

Inventory Disclosure [Abstract]

Summary of Inventory

A summary of inventories, which are stated at the lower of average cost or net realizable value, follows:

(Stated in millions)

	Sept. 30,		Dec. 31,
	2018		2017
Raw materials & field materials	$	1,885	$	1,846
Work in progress		541		503
Finished goods		1,682		1,697
	$	4,108	$	4,046

Fixed Assets (Tables)

9 Months Ended

Sep. 30, 2018

Property Plant And Equipment [Abstract]

Summary of Fixed Assets

A summary of fixed assets follows:

(Stated in millions)

	Sept. 30,		Dec. 31,
	2018		2017
Property, plant & equipment	$	38,695	$	37,813
Less: Accumulated depreciation		26,956		26,237
	$	11,739	$	11,576

Depreciation Expense Relating to Fixed Assets

Depreciation expense relating to fixed assets was as follows:

(Stated in millions)

	2018		2017
Third Quarter	$	516	$	591
Nine Months	$	1,564	$	1,796

Multiclient Seismic Data (Tables)

9 Months Ended

Sep. 30, 2018

Multiclient Seismic Data [Abstract]

Change in Carrying Amount of Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data for the nine months ended September 30, 2018 was as follows:

(Stated in millions)

Balance at December 31, 2017	$	727
Capitalized in period		63
Charged to expense		(151	)
Balance at September 30, 2018	$	639

Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets by Major Class

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

	(Stated in millions)

	Sept. 30, 2018						Dec. 31, 2017
	Gross		Accumulated		Net Book		Gross		Accumulated		Net Book
	Book Value		Amortization		Value		Book Value		Amortization		Value
Customer relationships	$	4,775	$	1,187	$	3,588	$	4,832	$	1,020	$	3,812
Technology/technical know-how		3,578		1,197		2,381		3,634		1,078		2,556
Tradenames		2,806		609		2,197		2,806		533		2,273
Other		1,362		598		764		1,295		582		713
	$	12,521	$	3,591	$	8,930	$	12,567	$	3,213	$	9,354

Amortization Expense Charged to Income for Intangible Assets

Amortization expense charged to income was as follows:

(Stated in millions)

	2018		2017
Third Quarter	$	167	$	165
Nine Months	$	506	$	501

Long-term Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Summary of Long-term Debt

A summary of Long-term Debt follows:

(Stated in millions)

	Sept. 30,		Dec. 31,
	2018		2017
4.00% Senior Notes due 2025	$	1,742	$	1,741
3.30% Senior Notes due 2021		1,596		1,595
3.00% Senior Notes due 2020		1,595		1,593
3.65% Senior Notes due 2023		1,493		1,492
4.20% Senior Notes due 2021		1,100		1,100
2.40% Senior Notes due 2022		997		996
3.63% Senior Notes due 2022		847		846
2.65% Senior Notes due 2022		598		598
2.20% Senior Notes due 2020		498		498
7.00% Notes due 2038		211		212
4.50% Notes due 2021		133		135
5.95% Notes due 2041		115		115
3.60% Notes due 2022		109		110
5.13% Notes due 2043		99		99
4.00% Notes due 2023		82		82
3.70% Notes due 2024		55		56
0.63% Guaranteed Notes due 2019		-		712
1.50% Guaranteed Notes due 2019		-		603
Commercial paper borrowings		2,600		1,694
Other		289		598
	$	14,159	$	14,875

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 835
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-Section 45
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Derivative Instruments and Hedging Activities (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Instruments And Hedging Activities Disclosure [Abstract]

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

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

							(Stated in millions)

	Gain (Loss) Recognized in Income
	Third Quarter						Nine Months
	2018			2017			2018			2017			Consolidated Statement of Income Classification
Derivatives designated as fair value hedges:
Cross currency swap	$	6		$	19		$	(6	)	$	66		Interest expense

Derivatives designated as cash flow hedges:
Foreign exchange contracts	$	(2	)	$	-		$	3		$	-		Cost of services/sales
Cross currency swap		(30	)		-			25			-		Interest expense
	$	(32	)	$	-		$	28		$	-
Derivatives not designated as hedges:
Foreign exchange contracts	$	(17	)	$	(10	)	$	15		$	(3	)	Cost of services/sales

Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

				(Stated in millions)

	Third Quarter 2018						Third Quarter 2017
				Income						Income
				Before						Before
	Revenue			Taxes			Revenue			Taxes
Reservoir Characterization	$	1,673		$	373		$	1,771		$	311
Drilling		2,429			339			2,120			301
Production		3,252			320			2,876			283
Cameron		1,298			148			1,297			194
Eliminations & other		(148	)		(28	)		(159	)		(30	)
Pretax operating income					1,152						1,059
Corporate & other ⁽¹⁾					(234	)					(234	)
Interest income ⁽²⁾					8						30
Interest expense ⁽³⁾					(139	)					(129	)
Charges and credits ⁽⁴⁾					-						(49	)
	$	8,504		$	787		$	7,905		$	677

⁽²⁾ Interest income excludes amounts which are included in the segments’ income ($2 million in 2018; $4 million in 2017).

⁽³⁾ Interest expense excludes amounts which are included in the segments’ income ($8 million in 2018; $13 million in 2017).

⁽⁴⁾ See Note 2 – Charges and Credits.

				(Stated in millions)

	Nine Months 2018						Nine Months 2017
				Income						Income
				Before						Before
	Revenue			Taxes			Revenue			Taxes
Reservoir Characterization	$	4,865		$	1,030		$	5,148		$	891
Drilling		6,789			921			6,212			832
Production		9,468			851			7,559			614
Cameron		3,902			481			3,791			530
Eliminations & other		(388	)		(63	)		(449	)		(101	)
Pretax operating income					3,220						2,766
Corporate & other ⁽¹⁾					(699	)					(715	)
Interest income ⁽²⁾					44						82
Interest expense ⁽³⁾					(405	)					(383	)
Charges and credits ⁽⁴⁾					(184	)					(723	)
	$	24,636		$	1,976		$	22,261		$	1,027

⁽²⁾ Interest income excludes amounts which are included in the segments’ income ($7 million in 2018; $15 million in 2017).

⁽³⁾ Interest expense excludes amounts which are included in the segments’ income ($29 million in 2018; $39 million in 2017).

⁽⁴⁾ See Note 2 – Charges and Credits.

Revenue by Geographic Area

Revenue by geographic area was as follows:

					(Stated in millions)

	Third Quarter				Nine Months
	2018		2017		2018		2017
North America	$	3,189	$	2,602	$	9,164	$	6,675
Latin America		978		952		2,767		2,942
Europe/CIS/Africa		1,820		1,843		5,316		5,255
Middle East & Asia		2,417		2,352		7,079		7,007
Eliminations & other		100		156		310		382
	$	8,504	$	7,905	$	24,636	$	22,261

Summary of North America and International Revenue Disaggregated by Segment

North America and International revenue disaggregated by segment was as follows:

						(Stated in millions)

	Third Quarter 2018
	North					Eliminations
	America		International			& other			Total
Reservoir Characterization	$	242	$	1,317		$	114		$	1,673
Drilling		601		1,760			68			2,429
Production		1,725		1,527			-			3,252
Cameron		617		656			25			1,298
Other		4		(45	)		(107	)		(148	)
	$	3,189	$	5,215		$	100		$	8,504


	Nine Months 2018
	North					Eliminations
	America		International			& other			Total
Reservoir Characterization	$	733	$	3,747		$	385		$	4,865
Drilling		1,733		4,884			172			6,789
Production		4,919		4,545			4			9,468
Cameron		1,761		2,070			71			3,902
Other		18		(84	)		(322	)		(388	)
	$	9,164	$	15,162		$	310		$	24,636

Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2018

Compensation And Retirement Disclosure [Abstract]

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

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

(Stated in millions)

	Third Quarter												Nine Months
	2018						2017						2018						2017
	US			Int'l			US			Int'l			US			Int'l			US			Int'l
Service cost	$	14		$	35		$	14		$	24		$	44		$	105		$	44		$	71
Interest cost		41			77			44			76			125			229			131			230
Expected return on plan assets		(61	)		(149	)		(60	)		(135	)		(186	)		(442	)		(181	)		(406	)
Amortization of prior service cost		3			3			3			24			9			8			9			73
Amortization of net loss		12			35			10			30			36			105			29			90
	$	9		$	1		$	11		$	19		$	28		$	5		$	32		$	58

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

(Stated in millions)

	Third Quarter						Nine Months
	2018			2017			2018			2017
Service cost	$	8		$	7		$	24		$	22
Interest cost		11			12			33			35
Expected return on plan assets		(15	)		(16	)		(47	)		(46	)
Amortization of prior service credit		(7	)		(7	)		(21	)		(22	)
	$	(3	)	$	(4	)	$	(11	)	$	(11	)

Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2018

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	)
Other comprehensive loss before reclassifications		(128	)		(33	)		(6	)		-			(167	)
Amounts reclassified from accumulated other comprehensive loss		-			-			(2	)		130			128
Net other comprehensive income		(128	)		(33	)		(8	)		130			(39	)
Balance, September 30, 2018	$	(2,267	)	$	(20	)	$	(5	)	$	(2,021	)	$	(4,313	)


										Pension and
	Currency									Other
	Translation			Marketable			Cash Flow			Postretirement
	Adjustments			Securities			Hedges			Benefit Plans			Total
Balance, January 1, 2017	$	(2,136	)	$	21		$	(19	)	$	(2,509	)	$	(4,643	)
Other comprehensive gain (loss) before reclassifications		49			(66	)		19			-			2
Amounts reclassified from accumulated other comprehensive loss		-			-			4			179			183
Income taxes											(2	)		(2	)
Net other comprehensive income		49			(66	)		23			177			183
Balance, September 30, 2017	$	(2,087	)	$	(45	)	$	4		$	(2,332	)	$	(4,460	)

Basis of Presentation - Additional Information (Detail) - USD ($) $ in Billions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Feb. 29, 2016
Organization And Summary Of Significant Accounting Policies [Line Items]
Total backlog	$ 2.5
Percentage of revenue expected to be recognized over next 12 months	59.00%
ASU No. 2016-02
Organization And Summary Of Significant Accounting Policies [Line Items]
New accounting pronouncement or change in accounting principle effect of additional assets and liabilities			$ 1.2
Receivables Less Allowance for Doubtful Accounts
Organization And Summary Of Significant Accounting Policies [Line Items]
Revenue in excess of billings	$ 0.2	$ 0.3
Accounts Payable and Accrued Liabilities
Organization And Summary Of Significant Accounting Policies [Line Items]
Billings and cash collections in excess of revenue	$ 0.8	$ 0.8
Minimum
Organization And Summary Of Significant Accounting Policies [Line Items]
Revenue recognition period	30 days
Maximum
Organization And Summary Of Significant Accounting Policies [Line Items]
Revenue recognition period	60 days

Charges and Credits - Additional Information (Detail) - USD ($)	3 Months Ended							9 Months Ended	12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2017
Charges And Credits [Line Items]
Charges and credits, pre tax								$ 723,000,000
Charges and credits	$ 0		$ 0			$ 50,000,000		667,000,000
Promissory note in exchange of accounts receivable						$ 700,000,000
Promissory note term						3 years
Promissory note interest rate						6.50%
Charge relating to one-time mandatory tax on previously deferred foreign earnings				$ 410,000,000					$ 410,000,000
Tax credits resulting from remeasurement of net deferred tax liabilities				334,000,000
US tax reform
Charges And Credits [Line Items]
Charges and credits				$ 76,000,000
US tax reform \| Tax Year2018
Charges And Credits [Line Items]
Reduced corporate income tax rate									21.00%
Impairments and Other \| Headcount Reductions
Charges And Credits [Line Items]
Charges and credits, pre tax		$ 184,000,000
Charges and credits		$ 164,000,000
Merger and Integration
Charges And Credits [Line Items]
Charges and credits, pre tax								213,000,000
Charges and credits								169,000,000
Merger and Integration \| Cameron International Corporation
Charges And Credits [Line Items]
Charges and credits					$ 49,000,000	$ 81,000,000
Merger and Integration \| Merger-related employee benefits \| Cameron International Corporation
Charges And Credits [Line Items]
Charges and credits							$ 82,000,000
Promissory Note Fair Value Adjustment and Other
Charges And Credits [Line Items]
Charges and credits, pre tax								510,000,000
Charges and credits						$ 460,000,000		$ 498,000,000

Charges and Credits - Summary of Charges and Credits (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Jun. 30, 2017	Sep. 30, 2017
Charges And Credits [Line Items]
Charges and credits, Pretax				$ 723,000,000
Charges and credits, Tax				44,000,000
Charges and credits, Noncontrolling Interests				12,000,000
Charges and credits, Net	$ 0	$ 0	$ 50,000,000	667,000,000
Promissory Note Fair Value Adjustment and Other
Charges And Credits [Line Items]
Charges and credits, Pretax				510,000,000
Charges and credits, Noncontrolling Interests				12,000,000
Charges and credits, Net			$ 460,000,000	498,000,000
Merger and Integration
Charges And Credits [Line Items]
Charges and credits, Pretax				213,000,000
Charges and credits, Tax				44,000,000
Charges and credits, Net				$ 169,000,000

Earnings Per Share - Reconciliation of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schlumberger Net Income
Basic	$ 644	$ 545	$ 1,599	$ 749
Diluted	$ 644	$ 545	$ 1,599	$ 749
Average Shares Outstanding
Basic	1,385	1,385	1,385	1,388
Assumed exercise of stock options		1	1	2
Unvested restricted stock	7	6	7	5
Diluted	1,392	1,392	1,393	1,395
Earnings per Share
Basic	$ 0.46	$ 0.39	$ 1.15	$ 0.54
Diluted	$ 0.46	$ 0.39	$ 1.15	$ 0.54

Earnings Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share [Abstract]
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount	40	43	40	30

Inventories - Summary of Inventory (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials & field materials	$ 1,885	$ 1,846
Work in progress	541	503
Finished goods	1,682	1,697
Inventories	$ 4,108	$ 4,046

Fixed Assets - Summary of Fixed Assets (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Property, plant & equipment	$ 38,695	$ 37,813
Less: Accumulated depreciation	26,956	26,237
Fixed assets less accumulated depreciation	$ 11,739	$ 11,576

Fixed Assets - Depreciation Expense Relating to Fixed Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property Plant And Equipment [Abstract]
Depreciation expense relating to fixed assets	$ 516	$ 591	$ 1,564	$ 1,796

Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Multiclient Seismic Data [Abstract]
Balance at December 31, 2017	$ 727
Capitalized in period	63
Charged to expense	(151)
Balance at September 30, 2018	$ 639

Intangible Assets - Schedule of Intangible Assets by Major Class (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Gross Book Value	$ 12,521	$ 12,567
Accumulated Amortization	3,591	3,213
Net Book Value	8,930	9,354
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Gross Book Value	4,775	4,832
Accumulated Amortization	1,187	1,020
Net Book Value	3,588	3,812
Technology/Technical Know-how
Finite Lived Intangible Assets [Line Items]
Gross Book Value	3,578	3,634
Accumulated Amortization	1,197	1,078
Net Book Value	2,381	2,556
Tradenames
Finite Lived Intangible Assets [Line Items]
Gross Book Value	2,806	2,806
Accumulated Amortization	609	533
Net Book Value	2,197	2,273
Other
Finite Lived Intangible Assets [Line Items]
Gross Book Value	1,362	1,295
Accumulated Amortization	598	582
Net Book Value	$ 764	$ 713

Intangible Assets - Amortization Expense Charged to Income for Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense	$ 167	$ 165	$ 506	$ 501

Intangible Assets - Additional Information (Detail) $ in Millions	Sep. 30, 2018 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Estimated amortization charged to income, remaining fourth quarter of 2018	$ 169
Estimated amortization charged to income, 2019	680
Estimated amortization charged to income, 2020	648
Estimated amortization charged to income, 2021	617
Estimated amortization charged to income, 2022	609
Estimated amortization charged to income, 2023	$ 594

Long-term Debt - Summary of Long-term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 14,159	$ 14,875
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt, carrying amount	2,600	1,694
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,742	1,741
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,596	1,595
3.00% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,595	1,593
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,493	1,492
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	1,100	1,100
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	997	996
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	847	846
2.65% Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	598	598
2.20% Senior Notes due 2020
Debt Instrument [Line Items]
Long-term debt, carrying amount	498	498
7.00% Notes due 2038
Debt Instrument [Line Items]
Long-term debt, carrying amount	211	212
4.50% Notes due 2021
Debt Instrument [Line Items]
Long-term debt, carrying amount	133	135
5.95% Notes due 2041
Debt Instrument [Line Items]
Long-term debt, carrying amount	115	115
3.60% Notes due 2022
Debt Instrument [Line Items]
Long-term debt, carrying amount	109	110
5.13% Notes due 2043
Debt Instrument [Line Items]
Long-term debt, carrying amount	99	99
4.00% Notes due 2023
Debt Instrument [Line Items]
Long-term debt, carrying amount	82	82
3.70% Notes due 2024
Debt Instrument [Line Items]
Long-term debt, carrying amount	55	56
0.63% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Long-term debt, carrying amount		712
1.50% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Long-term debt, carrying amount		603
Other
Debt Instrument [Line Items]
Long-term debt, carrying amount	$ 289	$ 598

Long-term Debt - Summary of Long-term Debt (Parenthetical) (Detail)	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Debt Instrument [Line Items]
Debt instrument interest rate			6.50%
4.00% Senior Notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%	4.00%
Debt instrument maturity date	2025	2025
3.30% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate	3.30%	3.30%
Debt instrument maturity date	2021	2021
3.00% Senior Notes due 2020
Debt Instrument [Line Items]
Debt instrument interest rate	3.00%	3.00%
Debt instrument maturity date	2020	2020
3.65% Senior Notes due 2023
Debt Instrument [Line Items]
Debt instrument interest rate	3.65%	3.65%
Debt instrument maturity date	2023	2023
4.20% Senior Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate	4.20%	4.20%
Debt instrument maturity date	2021	2021
2.40% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	2.40%	2.40%
Debt instrument maturity date	2022	2022
3.63% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	3.63%	3.63%
Debt instrument maturity date	2022	2022
2.65% Senior Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	2.65%	2.65%
Debt instrument maturity date	2022	2022
2.20% Senior Notes due 2020
Debt Instrument [Line Items]
Debt instrument interest rate	2.20%	2.20%
Debt instrument maturity date	2020	2020
7.00% Notes due 2038
Debt Instrument [Line Items]
Debt instrument interest rate	7.00%	7.00%
Debt instrument maturity date	2038	2038
4.50% Notes due 2021
Debt Instrument [Line Items]
Debt instrument interest rate	4.50%	4.50%
Debt instrument maturity date	2021	2021
5.95% Notes due 2041
Debt Instrument [Line Items]
Debt instrument interest rate	5.95%	5.95%
Debt instrument maturity date	2041	2041
3.60% Notes due 2022
Debt Instrument [Line Items]
Debt instrument interest rate	3.60%	3.60%
Debt instrument maturity date	2022	2022
5.13% Notes due 2043
Debt Instrument [Line Items]
Debt instrument interest rate	5.13%	5.13%
Debt instrument maturity date	2043	2043
4.00% Notes due 2023
Debt Instrument [Line Items]
Debt instrument interest rate	4.00%	4.00%
Debt instrument maturity date	2023	2023
3.70% Notes due 2024
Debt Instrument [Line Items]
Debt instrument interest rate	3.70%	3.70%
Debt instrument maturity date	2024	2024
0.63% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate	0.63%	0.63%
Debt instrument maturity date	2019	2019
1.50% Guaranteed Notes due 2019
Debt Instrument [Line Items]
Debt instrument interest rate	1.50%	1.50%
Debt instrument maturity date	2019	2019

Long-term Debt - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt, fair value	$ 14,100	$ 15,200
Short-term borrowings and current portion of long-term debt	3,215	3,324
Commercial paper borrowings
Debt Instrument [Line Items]
Short-term borrowings and current portion of long-term debt	500	1,300
Long-term debt	$ 3,100	$ 3,000

Derivative Instruments and Hedging Activities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018 USD ($) Country	Dec. 31, 2017 USD ($)	Jun. 30, 2017	Dec. 31, 2013 EUR (€)
Derivative [Line Items]
Denominated debt issued		$ 1,100,000,000
Promissory note interest rate			6.50%
Fixed rate debt aggregate, after taking into account the effects of the interest rate swaps	$ 13,300,000,000
Variable rate debt aggregate, after taking into account the effects of the interest rate swaps	4,100,000,000
Short-term investments	1,400,000,000
Recognized a cumulative net (loss) in Accumulated Other Comprehensive Loss relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges	$ (5,000,000)
Minimum
Derivative [Line Items]
Number of countries in which Schlumberger conducts business \| Country	85
1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Notes, face amount \| €				€ 500,000,000
Promissory note interest rate	1.50%	1.50%
2.20% Senior Notes due 2020
Derivative [Line Items]
Notes, face amount		$ 500,000,000
Derivative swap interest rate		2.20%
Promissory note interest rate	2.20%	2.20%
2.65% Senior Notes due 2022
Derivative [Line Items]
Notes, face amount		$ 600,000,000
Derivative swap interest rate		2.65%
Promissory note interest rate	2.65%	2.65%
Cross currency swap
Derivative [Line Items]
Notional amount of interest rate swap		$ 1,100,000,000		€ 500,000,000
Cross currency swap \| 2.20% Senior Notes due 2020
Derivative [Line Items]
Promissory note interest rate		1.97%
Cross currency swap \| 2.65% Senior Notes due 2022
Derivative [Line Items]
Promissory note interest rate		2.52%
Fixed Rate Debt \| 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Derivative swap interest rate				1.50%
Floating Rate Debt \| 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Floating interest rate on securities	three-month LIBOR plus approximately 64 basis points
Foreign exchange contracts
Derivative [Line Items]
Notional amount of interest rate swap	$ 5,000,000,000
Foreign exchange contracts \| Debt \| Derivatives designated as hedges
Derivative [Line Items]
Notional amount of interest rate swap	$ 1,900,000,000
London Interbank Offered Rate (LIBOR) \| Floating Rate Debt \| 1.50% Guaranteed Notes due 2019
Derivative [Line Items]
Basis point	0.64%

Derivative Instruments and Hedging Activities - Effect of Derivative Instruments Designated as Fair Value and Cash Flow Hedges and Not Designated as Hedges on Consolidated Statement of Income (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Derivatives not designated as hedges \| Foreign exchange contracts \| Cost of services/sales
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income (Loss)	$ (17)	$ (10)	$ 15	$ (3)
Fair Value Hedging \| Derivatives designated as hedges \| Cross currency swap \| Interest expense
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income (Loss)	6	$ 19	(6)	$ 66
Cash Flow Hedging \| Derivatives designated as hedges
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income (Loss)	(32)		28
Cash Flow Hedging \| Derivatives designated as hedges \| Cross currency swap \| Interest expense
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income (Loss)	(30)		25
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 (Loss)	$ (2)		$ 3

Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($)
$ in Millions

3 Months Ended

9 Months Ended

Sep. 30, 2018

Sep. 30, 2017

Sep. 30, 2018

Sep. 30, 2017

Segment Reporting Information [Line Items]

Revenue

$ 8,504

$ 7,905

$ 24,636

$ 22,261

Income Before Taxes

787

677

1,976

1,027

Pretax operating income

1,152

1,059

3,220

2,766

Interest expense

147

142

434

422

Reservoir Characterization

Segment Reporting Information [Line Items]

Revenue

1,673

4,865

Drilling

Segment Reporting Information [Line Items]

Revenue

2,429

6,789

Production

Segment Reporting Information [Line Items]

Revenue

3,252

9,468

Cameron

Segment Reporting Information [Line Items]

Revenue

1,298

3,902

Operating Segments

Segment Reporting Information [Line Items]

Revenue

8,504

7,905

24,636

22,261

Interest income

Interest expense

Operating Segments | Reservoir Characterization

Segment Reporting Information [Line Items]

Revenue

1,673

1,771

4,865

5,148

Income Before Taxes

373

311

1,030

891

Operating Segments | Drilling

Segment Reporting Information [Line Items]

Revenue

2,429

2,120

6,789

6,212

Income Before Taxes

339

301

921

832

Operating Segments | Production

Segment Reporting Information [Line Items]

Revenue

3,252

2,876

9,468

7,559

Income Before Taxes

320

283

851

614

Operating Segments | Cameron

Segment Reporting Information [Line Items]

Revenue

1,298

1,297

3,902

3,791

Income Before Taxes

148

194

481

530

Eliminations & other

Segment Reporting Information [Line Items]

Revenue

(148)

(159)

(388)

(449)

Income Before Taxes

(28)

(30)

(63)

(101)

Corporate & other

^[1]

(234)

(699)

(715)

Interest income

^[2]

^[3]

Interest expense

$ (139)

^[4]

(129)

^[4]

(405)

^[5]

(383)

^[5]

Charges and credits

^[6]

$ (49)

$ (184)

$ (723)

[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 ($2 million in 2018; $4 million in 2017).
[3]	Interest income excludes amounts which are included in the segments’ income ($7 million in 2018; $15 million in 2017).
[4]	Interest expense excludes amounts which are included in the segments’ income ($8 million in 2018; $13 million in 2017).
[5]	Interest expense excludes amounts which are included in the segments’ income ($29 million in 2018; $39 million in 2017).
[6]	See Note 2 – Charges and Credits.

Segment Information - Schedule of Segment Reporting Information, by Segment (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Interest expense	$ 147	$ 142	$ 434	$ 422
Operating Segments
Segment Reporting Information [Line Items]
Interest income	2	4	7	15
Interest expense	$ 8	$ 13	$ 29	$ 39

Segment Information - Revenue by Geographic Area (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 8,504	$ 7,905	$ 24,636	$ 22,261
Operating Segments
Segment Reporting Information [Line Items]
Revenue	8,504	7,905	24,636	22,261
Operating Segments \| North America
Segment Reporting Information [Line Items]
Revenue	3,189	2,602	9,164	6,675
Operating Segments \| Latin America
Segment Reporting Information [Line Items]
Revenue	978	952	2,767	2,942
Operating Segments \| Europe/CIS/Africa
Segment Reporting Information [Line Items]
Revenue	1,820	1,843	5,316	5,255
Operating Segments \| Middle East & Asia
Segment Reporting Information [Line Items]
Revenue	2,417	2,352	7,079	7,007
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	$ 100	$ 156	$ 310	$ 382

Segment Information - Summary of North America and International Revenue Disaggregated by Segment (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Revenue	$ 8,504	$ 7,905	$ 24,636	$ 22,261
Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,673		4,865
Drilling
Segment Reporting Information [Line Items]
Revenue	2,429		6,789
Production
Segment Reporting Information [Line Items]
Revenue	3,252		9,468
Cameron
Segment Reporting Information [Line Items]
Revenue	1,298		3,902
Other
Segment Reporting Information [Line Items]
Revenue	(148)		(388)
Operating Segments
Segment Reporting Information [Line Items]
Revenue	8,504	7,905	24,636	22,261
Operating Segments \| Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,673	1,771	4,865	5,148
Operating Segments \| Drilling
Segment Reporting Information [Line Items]
Revenue	2,429	2,120	6,789	6,212
Operating Segments \| Production
Segment Reporting Information [Line Items]
Revenue	3,252	2,876	9,468	7,559
Operating Segments \| Cameron
Segment Reporting Information [Line Items]
Revenue	1,298	1,297	3,902	3,791
Eliminations & other
Segment Reporting Information [Line Items]
Revenue	100	156	310	382
Eliminations & other \| Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	114		385
Eliminations & other \| Drilling
Segment Reporting Information [Line Items]
Revenue	68		172
Eliminations & other \| Production
Segment Reporting Information [Line Items]
Revenue			4
Eliminations & other \| Cameron
Segment Reporting Information [Line Items]
Revenue	25		71
Eliminations & other \| Other
Segment Reporting Information [Line Items]
Revenue	(107)		(322)
North America \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	3,189	$ 2,602	9,164	$ 6,675
North America \| Operating Segments \| Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	242		733
North America \| Operating Segments \| Drilling
Segment Reporting Information [Line Items]
Revenue	601		1,733
North America \| Operating Segments \| Production
Segment Reporting Information [Line Items]
Revenue	1,725		4,919
North America \| Operating Segments \| Cameron
Segment Reporting Information [Line Items]
Revenue	617		1,761
North America \| Operating Segments \| Other
Segment Reporting Information [Line Items]
Revenue	4		18
International \| Operating Segments
Segment Reporting Information [Line Items]
Revenue	5,215		15,162
International \| Operating Segments \| Reservoir Characterization
Segment Reporting Information [Line Items]
Revenue	1,317		3,747
International \| Operating Segments \| Drilling
Segment Reporting Information [Line Items]
Revenue	1,760		4,884
International \| Operating Segments \| Production
Segment Reporting Information [Line Items]
Revenue	1,527		4,545
International \| Operating Segments \| Cameron
Segment Reporting Information [Line Items]
Revenue	656		2,070
International \| Operating Segments \| Other
Segment Reporting Information [Line Items]
Revenue	$ (45)		$ (84)

Pension and Other Postretirement Benefit Plans - Net Pension Cost for Schlumberger Pension Plans and US Postretirement Medical Plan (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 8	$ 7	$ 24	$ 22
Interest cost	11	12	33	35
Expected return on plan assets	(15)	(16)	(47)	(46)
Amortization of prior service cost	(7)	(7)	(21)	(22)
Total pension cost	(3)	(4)	(11)	(11)
US
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	14	44	44
Interest cost	41	44	125	131
Expected return on plan assets	(61)	(60)	(186)	(181)
Amortization of prior service cost	3	3	9	9
Amortization of net loss	12	10	36	29
Total pension cost	9	11	28	32
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	35	24	105	71
Interest cost	77	76	229	230
Expected return on plan assets	(149)	(135)	(442)	(406)
Amortization of prior service cost	3	24	8	73
Amortization of net loss	35	30	105	90
Total pension cost	$ 1	$ 19	$ 5	$ 58

Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	$ 37,261	$ 41,529
Other comprehensive gain (loss) before reclassifications	(167)	2
Amounts reclassified from accumulated other comprehensive loss	128	183
Income taxes		(2)
Net other comprehensive income	(39)	183
Balance	36,948	40,010
Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,139)	(2,136)
Other comprehensive gain (loss) before reclassifications	(128)	49
Net other comprehensive income	(128)	49
Balance	(2,267)	(2,087)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	13	21
Other comprehensive gain (loss) before reclassifications	(33)	(66)
Net other comprehensive income	(33)	(66)
Balance	(20)	(45)
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	3	(19)
Other comprehensive gain (loss) before reclassifications	(6)	19
Amounts reclassified from accumulated other comprehensive loss	(2)	4
Net other comprehensive income	(8)	23
Balance	(5)	4
Pension and Other Postretirement Benefit Plans
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(2,151)	(2,509)
Amounts reclassified from accumulated other comprehensive loss	130	179
Income taxes		(2)
Net other comprehensive income	130	177
Balance	(2,021)	(2,332)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	(4,274)	(4,643)
Balance	$ (4,313)	$ (4,460)