v2.4.0.6
Earnings Per Share Earnings (Loss) per Share (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Earnings (Loss) Per Share [Line Items]    
Net income (loss) attributable to stockholders $ 1,315 $ 3,366
Net income (loss) attributable to common stockholders 1,004 3,151
Lower share price boundary for two class method $ 33.00 $ 33.00
Upper Share Price Boundary for Two Class Method   $ 39.60
Earnings Per Share, Basic [Member]
    
Earnings (Loss) Per Share [Line Items]    
Net income (loss) attributable to stockholders 1,315 3,366
Less: cumulative dividends on and undistributed earnings allocated to Series B Preferred Stock participating security (311) (215)
Net income (loss) attributable to common stockholders 1,004 3,151
Basic earnings per common share $ 0.64 $ 2.09
Weighted-average common shares outstanding - basic 1,572,000,000 1,504,000,000
Dividends, Preferred Stock 215 215
Earnings Per Share, Diluted [Member]
    
Earnings (Loss) Per Share [Line Items]    
Net income (loss) attributable to stockholders 1,315 3,366
Less: cumulative dividends on and undistributed earnings allocated to Series B Preferred Stock participating security (305) (215)
Addition of preferred dividends to holders of Series B Preferred Stock 0 59
Net income (loss) attibutable to common stockholders 1,010 3,210
Weighted-average common shares outstanding - basic 1,572,000,000 1,504,000,000
Dilutive effect of warrants 116,000,000 162,000,000
Dilutive effect of conversion of Series B Preferred Stock 0 148,000,000
Dilutive effect of restricted stock units 4,000,000 3,000,000
Weighted-average common shares outstanding - diluted 1,692,000,000 1,817,000,000
Diluted earnings per common share $ 0.60 $ 1.77
Dividends, Preferred Stock 215 215
Preferred Stock Assumed Converted 152,000,000  
Warrant Tranche Outstanding 313,000,000 318,000,000
Warrants Excluded from EPS 46,000,000 46,000,000
Unvested RSUs outstanding 18,000,000 15,000,000
Earnings Per Share, Diluted [Member] | MLC [Member]
    
Earnings (Loss) Per Share [Line Items]    
Warrant Tranche Outstanding 272,000,000  
Series A Preferred Stock [Member]
    
Earnings (Loss) Per Share [Line Items]    
Preferred Stock, Amount of Preferred Dividends in Arrears 26 26
Series B Preferred Stock [Member]
    
Earnings (Loss) Per Share [Line Items]    
Preferred Stock, Amount of Preferred Dividends in Arrears 20 20
Series B Preferred Stock [Member] | Earnings Per Share, Basic [Member]
    
Earnings (Loss) Per Share [Line Items]    
Earnings allocated to Series B Preferred Stock 96  
Series B Preferred Stock [Member] | Earnings Per Share, Diluted [Member]
    
Earnings (Loss) Per Share [Line Items]    
Earnings allocated to Series B Preferred Stock $ 90  
US Pension Plans [Member]
    
Earnings (Loss) Per Share [Line Items]    
Stock issued during period, shares, employee benefit   61,000,000