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Multiclient Seismic Data (Tables)
 12 Months Ended
Dec. 31, 2019
Multiclient Seismic Data [Abstract]  
Change in Carrying Amount of Multiclient Seismic Data

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

 

(Stated in millions)

 

 

 

 

 

 

 

 

 

 

2019

 

 

2018

 

Balance at beginning of year

$

601

 

 

$

727

 

Capitalized in period

 

231

 

 

 

100

 

Charged to expense

 

(264

)

 

 

(226

)

 

$

568

 

 

$

601