Quarterly report pursuant to Section 13 or 15(d)

Securities - Realized Gains and Losses (Details)

v2.4.0.6
Securities - Realized Gains and Losses (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]    
Net gains on sales of debt securities $ 68 $ 752
Debt Securities [Member]
   
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]    
Gross Gains 69 1,173
Gross Losses (1) (421)
Net gains on sales of debt securities 68 752
Income tax expense attributable to realized net gains on sales of AFS debt securities $ 25 $ 278