Goodwill (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill [Abstract]

Changes in the carrying amount of goodwill

								(Stated in millions)
	Reservoir Characterization		Drilling			Production		Distribution		Total
Balance at January 1, 2012	$	3,360	$	8,362		$	2,356	$	76	$	14,154
Reallocation		—		(125	)		125		—		—
Impact of changes in exchange rates		18		13			14		—		45
Balance at March 31, 2012	$	3,378	$	8,250		$	2,495	$	76	$	14,199