Environmental (Schedule of Environmental Remediation Reserves) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Environmental Remediation Obligations [Abstract]
Demerger obligations (Note 23)	$ 34	$ 36
Divestiture obligations (Note 23)	24	26
Active sites	20	22
US Superfund sites	14	13
Other environmental remediation reserves	4	4
Total	$ 96	$ 101

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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