Multiclient Seismic Data

12 Months Ended

Dec. 31, 2015

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)
	2015			2014
Balance at beginning of year.........................................	$	793		$	667
Capitalized in period..............................................		486			321
Charged to expense...............................................		(253	)		(195	)
	$	1,026		$	793