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Noncurrent Other Liabilities
 9 Months Ended
Sep. 30, 2021
Other Liabilities, Noncurrent [Abstract]  
Noncurrent Other Liabilities Noncurrent Other Liabilities
As of
September 30,
2021		As of
December 31,
2020
(In $ millions)
Asset retirement obligations13 10 
Deferred proceeds44 47 
Deferred revenue (Note 18)
4 4 
Derivatives (Note 14)
9 34 
Environmental (Note 10)
45 58 
Insurance38 33 
Other25 28 
Total178 214