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Environmental (Tables)
 3 Months Ended
Mar. 31, 2022
Environmental Remediation Obligations [Abstract]  
Schedule of Environmental Remediation Reserves
The components of environmental remediation liabilities are as follows:
As of
March 31,
2022		As of
December 31,
2021
(In $ millions)
Demerger obligations (Note 14)
22 24 
Divestiture obligations (Note 14)
14 14 
Active sites8 8 
U.S. Superfund sites11 12 
Other environmental remediation liabilities2 2 
Total57 60