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Noncurrent Other Liabilities
 6 Months Ended
Jun. 30, 2019
Other Liabilities, Noncurrent [Abstract]  
Noncurrent Other Liabilities Noncurrent Other Liabilities
 
As of
June 30,
2019
 
As of
December 31,
2018
 
(In $ millions)
Asset retirement obligations
14

 
13

Deferred proceeds
44

 
44

Deferred revenue (Note 21)
7

 
7

Derivatives (Note 17)
42

 
11

Environmental (Note 12)
49

 
49

Insurance
41

 
37

Other
30

 
47

Total
227

 
208