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Goodwill and Other Intangibles (Estimated Amortization Expense) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2014 $ 22
2015 20
2016 18
2017 17
2018 $ 17