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Multiclient Seismic Data - Change in Carrying Amount of Multiclient Seismic Data (Detail)
$ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
Multiclient Seismic Data [Abstract]  
Opening balance $ 568
Capitalized in period 61
Charged to expense (96)
Impairments (See Note 2) (156)
Other (21)
Ending balance $ 356