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Noncurrent Other Liabilities
 12 Months Ended
Dec. 31, 2020
Other Liabilities, Noncurrent [Abstract]  
Noncurrent Other Liabilities Noncurrent Other Liabilities
As of December 31,
20202019
(In $ millions)
Asset retirement obligations10 13 
Deferred proceeds47 43 
Deferred revenue4 6 
Derivatives (Note 19)
34 50 
Environmental (Note 14)
58 49 
Insurance33 34 
Other28 28 
Total214 223