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Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2017
USD ($)
Multiclient Seismic Data [Abstract]  
Balance at December 31, 2016 $ 1,073
Capitalized in period 190
Charged to expense (221)
Balance at June 30, 2017 $ 1,042