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Derivatives and Hedging Activities (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Gain/(loss) recorded to AOCI after tax, that is expected to be reclassified to earnings $ 2  
Fair values of derivative instruments containing credit risk-related contingent features in a net liability position 3 18
Collateral threshold based on company's current credit rating $ 10