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
	Mar. 31, 2017	Mar. 31, 2016
US Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 15	$ 18
Interest cost	44	44
Expected return on plan assets	(60)	(61)
Amortization of prior service cost	3	3
Amortization of net loss	10	23
Total pension cost	12	27
International
Defined Benefit Plan Disclosure [Line Items]
Service cost	29	37
Interest cost	78	80
Expected return on plan assets	(136)	(134)
Amortization of prior service cost	24	30
Amortization of net loss	33	22
Total pension cost	28	35
Postretirement medical plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	8	8
Interest cost	11	12
Expected return on plan assets	(15)	(14)
Amortization of prior service cost	(7)	(8)
Total pension cost	$ (3)	$ (2)