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Noncurrent Other Liabilities
 6 Months Ended
Jun. 30, 2021
Other Liabilities, Noncurrent [Abstract]  
Noncurrent Other Liabilities Noncurrent Other Liabilities
As of
June 30,
2021		As of
December 31,
2020
(In $ millions)
Asset retirement obligations14 10 
Deferred proceeds46 47 
Deferred revenue (Note 18)
4 4 
Derivatives (Note 14)
22 34 
Environmental (Note 10)
53 58 
Insurance36 33 
Other25 28 
Total200 214