v2.4.0.6
Securities Available for Sale, Realized Gains and Losses (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]      
Gross realized gains $ 1,305 $ 645 $ 1,601
Gross realized losses (70) (32) (160)
OTTI Write-downs (541) (692) (1,094)
Net realized gains on securities available for sale 694 (79) 347
Net realized gains from principal and private equity investments 842 534 (289)
Net realized gains from debt securities and equity investments $ 1,536 $ 455 $ 58