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