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		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 7	$ 7	$ 15	$ 15
Interest cost	12	12	23	24
Expected return on plan assets	(16)	(15)	(31)	(29)
Amortization of prior service cost	(7)	(8)	(14)	(16)
Total pension cost	(4)	(4)	(7)	(6)
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	13	29	31
Interest cost	44	45	88	89
Expected return on plan assets	(62)	(58)	(122)	(118)
Amortization of prior service cost	3	3	6	6
Amortization of net loss	9	17	19	40
Total pension cost	8	20	20	48
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	19	19	48	56
Interest cost	75	77	153	157
Expected return on plan assets	(134)	(129)	(270)	(263)
Amortization of prior service cost	24	31	48	61
Amortization of net loss	27	17	60	39
Total pension cost	$ 11	$ 15	$ 39	$ 50