Goodwill (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill by reporting unit were as follows:

	(Stated in millions)
	Reservoir
	Characterization		Drilling		Production		Cameron			Total
Balance, January 1, 2016	$	3,798	$	8,584	$	3,223	$	-		$	15,605
Acquisition of Cameron		790		1,490		1,170		5,563			9,013
Other acquisitions		79		24		242		-			345
Reallocation		146		-		-		(146	)		-
Impact of changes in exchange rates		7		16		4		-			27
Balance, December 31, 2016		4,820		10,114		4,639		5,417			24,990
Acquisitions		21		3		46		24			94
Impact of changes in exchange rates		7		9		12		6			34
Balance, December 31, 2017	$	4,848	$	10,126	$	4,697	$	5,447		$	25,118