Environmental (Tables)

12 Months Ended

Dec. 31, 2016

Environmental Remediation Obligations [Abstract]

Schedule of Environmental Remediation Reserves

The components of environmental remediation reserves are as follows:

	As of December 31,
	2016	2015
	(In $ millions)
Demerger obligations (Note 24)	18	22
Divestiture obligations (Note 24)	16	17
Active sites	16	18
US Superfund sites	11	13
Other environmental remediation reserves	3	2
Total	64	72

Schedule of Environmental Ownership and Liability Percentages

The Company's ownership interest and environmental liability participation percentages for such liabilities, which cannot be attributed to an InfraServ partner are as follows:

	As of December 31, 2016
	Ownership	Liability	Reserves(1)
	(In percentages)		(In $ millions)
InfraServ GmbH & Co. Gendorf KG	39	10	10
InfraServ GmbH & Co. Hoechst KG	32	40	62
InfraServ GmbH & Co. Knapsack KG	27	22	1

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⁽¹⁾  Gross reserves maintained by the respective InfraServ entity.