Pension and Other Postretirement Benefits

3 Months Ended

Jun. 30, 2011

Pension and Other Postretirement Benefits [Abstract]

Pension and Other Postretirement Benefits

15. Pension and Other Postretirement Benefits

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

	(Stated in millions)
	Second Quarter												Six Months
	2011						2010						2011						2010
	US			Int’l			US			Int’l			US			Int’l			US			Int’l
Service cost — benefits earned during period	$	14		$	17		$	13		$	10		$	30		$	34		$	28		$	24
Interest cost on projected benefit obligation		37			57			35			51			75			113			71			103
Expected return on plan assets		(42	)		(71	)		(47	)		(57	)		(85	)		(141	)		(95	)		(115	)
Amortization of prior service cost		3			30			1			29			6			61			2			57
Amortization of net loss		22			8			15			5			44			16			31			10
	$	34		$	41		$	17		$	38		$	70		$	83		$	37		$	79

During the first six months of 2011, Schlumberger made contributions to its US and international defined benefit pension plans of $105 million.

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

	(Stated in millions)
	Second Quarter						Six Months
	2011			2010			2011			2010
Service cost — benefits earned during period	$	5		$	6		$	12		$	11
Interest cost on accumulated postretirement benefit obligation		15			14			29			29
Expected return on plan assets		(5	)		(2	)		(10	)		(3	)
Amortization of prior service cost		(3	)		(5	)		(6	)		(10	)
Amortization of net loss		3			2			6			6
	$	15		$	15		$	31		$	33

During the first six months of 2011, Schlumberger made contributions to its US postretirement medical plan of $17 million.