v2.4.0.6
Securities Available for Sale, Realized Gains and Losses (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]      
Gross realized gains $ 600 $ 1,305 $ 645
Gross realized losses (73) (70) (32)
OTTI Write-downs (256) (541) (692)
Net realized gains (losses) from securities available for sale 271 694 (79)
Net realized gains from private equity investments 1,086 842 534
Net realized gains from debt securities and equity investments $ 1,357 $ 1,536 $ 455