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Discontinued Operations And Assets Held For Sale (Schedule Of Major Classes Of Assets And Liabilities Of Operations Held For Sale) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Discontinued Operations And Assets Held For Sale [Abstract]    
Receivables   $ 2
Properties, plants, and equipment 2 2
Other assets   2
Assets held for sale 2 [1] 6 [1]
Accounts payable, trade 1 1
Accrued expenses 5 15
Liabilities of operations held for sale $ 6 [1] $ 16 [1]
[1] Assets held for sale were included in Other noncurrent assets and Liabilities of operations held for sale were included in Other noncurrent liabilities and deferred credits on the accompanying Consolidated Balance Sheet.