Environmental (Tables)

3 Months Ended

Mar. 31, 2018

Environmental Remediation Obligations [Abstract]

Schedule of Environmental Remediation Reserves

The components of environmental remediation reserves are as follows:

	As of March 31, 2018	As of December 31, 2017
	(In $ millions)
Demerger obligations (Note 18)	28	28
Divestiture obligations (Note 18)	18	17
Active sites	15	15
US Superfund sites	12	11
Other environmental remediation reserves	2	2
Total	75	73