Pension and Other Postretirement Benefit Plans

9 Months Ended

Sep. 30, 2018

Compensation And Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefit Plans

12.   Pension and Other Postretirement Benefit Plans

Net pension cost for the Schlumberger pension plans included the following components:

(Stated in millions)
	Third Quarter												Nine Months
	2018						2017						2018						2017
	US			Int'l			US			Int'l			US			Int'l			US			Int'l
Service cost	$	14		$	35		$	14		$	24		$	44		$	105		$	44		$	71
Interest cost		41			77			44			76			125			229			131			230
Expected return on plan assets		(61	)		(149	)		(60	)		(135	)		(186	)		(442	)		(181	)		(406	)
Amortization of prior service cost		3			3			3			24			9			8			9			73
Amortization of net loss		12			35			10			30			36			105			29			90
	$	9		$	1		$	11		$	19		$	28		$	5		$	32		$	58

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

(Stated in millions)
	Third Quarter						Nine Months
	2018			2017			2018			2017
Service cost	$	8		$	7		$	24		$	22
Interest cost		11			12			33			35
Expected return on plan assets		(15	)		(16	)		(47	)		(46	)
Amortization of prior service credit		(7	)		(7	)		(21	)		(22	)
	$	(3	)	$	(4	)	$	(11	)	$	(11	)