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Equity AOCI (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Net unrealized Gains on AFS securities for which we have not recorded OTTI, net of tax $ 481 $ 365    
Net unrealized gains on AFS securities for which we have recorded OTTI, net of tax 1,518 1,262    
Prior service cost and actuarial losses, net of amortization, net of tax (395) (395)    
Other Losses (29) (29)    
Accumulated other comprehensive income $ 1,575 $ 1,203 $ 1,038 $ 384