Pension and Other Benefit Plans - Fair Value of Schlumberger's Pension Plan Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
US Plan Assets
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	$ 3,269	$ 2,910	$ 2,655
US Plan Assets | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	77	56
US Plan Assets | US
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,068	868
US Plan Assets | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	572	513
US Plan Assets | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	548	495
US Plan Assets | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	639	638
US Plan Assets | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	99	99
US Plan Assets | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	204	185
US Plan Assets | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	62	56
US Plan Assets | Level One
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,264	1,070
US Plan Assets | Level One | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	24	5
US Plan Assets | Level One | US
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	625	502
US Plan Assets | Level One | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	454	406
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	161	157
US Plan Assets | Level Two
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,739	1,599
US Plan Assets | Level Two | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	53	51
US Plan Assets | Level Two | US
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	443	366
US Plan Assets | Level Two | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	118	107
US Plan Assets | Level Two | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	548	495
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	478	481
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	99	99
US Plan Assets | Level Three
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	266	241
US Plan Assets | Level Three | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value
US Plan Assets | Level Three | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	204	185
US Plan Assets | Level Three | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	62	56
International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	6,246	5,120	4,097
International | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	267	168
International | US
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	2,175	1,583
International | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,566	1,258
International | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	576	540
International | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	997	976
International | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	301	289
International | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	206	128
International | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	60	55
International | Other
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	98	123
International | Level One
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	2,726	2,074
International | Level One | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	127	157
International | Level One | US
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	1,603	1,152
International | Level One | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	990	765
International | Level One | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	6
International | Level Two
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	3,156	2,740
International | Level Two | Cash and cash equivalents
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	140	11
International | Level Two | US
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	572	431
International | Level Two | International
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	576	493
International | Level Two | Corporate bonds
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	576	540
International | Level Two | Government and government-related debt securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	991	976
International | Level Two | Collateralized mortgage obligations and mortgage backed securities
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	301	289
International | Level Three
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	364	306
International | Level Three | Private equity
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	206	128
International | Level Three | Real estate
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	60	55
International | Level Three | Other
Pension Plans Postretirement And Other Employee Benefits [Line Items]
Plan assets at fair value	$ 98	$ 123