Environmental (Schedule of Environmental Remediation Reserves) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Environmental Remediation Obligations [Abstract]
Demerger obligations (Note 17)	$ 28	$ 31
Divestiture obligations (Note 17)	21	21
Active Sites	26	28
US Superfund sites	15	15
Other environmental remediation reserves	4	4
Total	$ 94	$ 99

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

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