Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Net Pension Cost (Credit) for Schlumberger Pension Plans and US Postretirement Medical Plan

Net pension cost (credit) for the Schlumberger pension plans included the following components:

(Stated in millions)
	Second Quarter												Six Months
	2018						2017						2018						2017
	US			Int'l			US			Int'l			US			Int'l			US			Int'l
Service cost	$	14		$	38		$	14		$	19		$	30		$	70		$	29		$	48
Interest cost		41			76			44			75			84			152			88			153
Expected return on plan assets		(63	)		(149	)		(62	)		(134	)		(125	)		(293	)		(122	)		(270	)
Amortization of prior service cost		3			3			3			24			6			5			6			48
Amortization of net loss		12			27			9			27			24			70			19			60
	$	7		$	(5	)	$	8		$	11		$	19		$	4		$	20		$	39

The net periodic benefit credit for the Schlumberger US postretirement medical plan included the following components:

(Stated in millions)
	Second Quarter						Six Months
	2018			2017			2018			2017
Service cost	$	8		$	7		$	16		$	15
Interest cost		10			12			22			23
Expected return on plan assets		(16	)		(16	)		(32	)		(31	)
Amortization of prior service credit		(7	)		(7	)		(14	)		(14	)
	$	(5	)	$	(4	)	$	(8	)	$	(7	)