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Goodwill And Other Intangibles (Estimated Future Aggregate Amortization Expense) (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
2015 (excludes amortization through June 30, 2015) $ 55  
2016 98  
2017 94  
2018 88  
2019 83  
Subsequent years 356  
Net Carrying Amount $ 774 $ 692