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Other Assets And Liabilities (Other Assets) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Other Assets And Liabilities [Abstract]    
Other investments $ 21 $ 16
Cash value of life insurance policies 31 29
Deferred taxes 15 17
Long Term Certificates of Deposit 31 0
Other non-current assets 27 27
Total other assets $ 125 $ 89