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Other Assets and Liabilities - Other Assets (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Other Assets [Abstract]    
Other investments $ 16 $ 11
Cash value of life insurance policies 29 25
Deferred taxes 17 38
Other non-current assets 27 26
Total other assets $ 89 $ 100