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Goodwill And Other Intangibles (Estimated Future Aggregate Amortization Expense) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]    
2014 (excludes amortization through March 31, 2014) $ 82  
2015 102  
2016 97  
2017 90  
2018 89  
Subsequent years 180  
Net Carrying Amount $ 640 $ 472