Multiclient Seismic Data

12 Months Ended

Dec. 31, 2014

Multiclient Seismic Data [Abstract]

Multiclient Seismic Data

7. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data is as follows:

	(Stated in millions)
	2014			2013
Balance at beginning of year	$	667		$	518
Capitalized in year		321			394
Charged to expense		(195	)		(245	)
	$	793		$	667