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Goodwill and Other Intangible Assets Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]      
Amortization of Intangible Assets $ 25 $ 26 $ 29