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Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Multiclient Seismic Data [Abstract]    
Opening balance $ 1,073 $ 1,026
Capitalized in period 276 630
Charged to expense (377) (385)
Impairment charge (see Note 3) (245) (198)
Ending balance $ 727 $ 1,073