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, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 16	$ 22	$ 47	$ 65
Interest cost	44	42	133	127
Expected return on plan assets	(60)	(57)	(178)	(172)
Amortization of prior service cost	3	3	9	9
Amortization of net loss	20	30	60	92
Total pension cost	23	40	71	121
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	27	30	83	128
Interest cost	78	75	235	224
Expected return on plan assets	(128)	(125)	(391)	(381)
Amortization of prior service cost	30	30	91	91
Amortization of net loss	20	54	59	128
Total pension cost	27	64	77	190
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	11	23	32
Interest cost	11	12	35	36
Expected return on plan assets	(14)	(13)	(43)	(39)
Amortization of prior service cost	(8)	(8)	(24)	(24)
Amortization of net loss		3		10
Total pension cost	$ (3)	$ 5	$ (9)	$ 15