Pension and Other Postretirement Benefits

9 Months Ended

Sep. 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)
	Third Quarter												Nine Months
	2011						2010						2011						2010
	US			Int’l			US			Int’l			US			Int’l			US			Int’l
Service cost — benefits earned during period	$	14		$	15		$	15		$	15		$	44		$	49		$	43		$	39
Interest cost on projected benefit obligation		37			56			35			53			112			169			106			156
Expected return on plan assets		(42	)		(69	)		(48	)		(59	)		(127	)		(210	)		(143	)		(174	)
Amortization of prior service cost		3			30			1			28			9			91			3			85
Amortization of net loss		23			7			14			5			67			23			45			15
	$	35		$	39		$	17		$	42		$	105		$	122		$	54		$	121

During the first nine months of 2011, Schlumberger made contributions to its US and international defined benefit pension plans of $204 million.

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

	(Stated in millions)
	Third Quarter						Nine Months
	2011			2010			2011			2010
Service cost — benefits earned during period	$	6		$	6		$	18		$	17
Interest cost on accumulated postretirement benefit obligation		14			14			43			43
Expected return on plan assets		(5	)		(1	)		(15	)		(4	)
Amortization of prior service cost		(3	)		(5	)		(9	)		(15	)
Amortization of net loss		4			2			10			8
	$	16		$	16		$	47		$	49

During the first nine months of 2011, Schlumberger made contributions to its US postretirement medical plan of $155 million.