v3.2.0.727
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Basic earnings per share        
Net income attributable to stockholders $ 1,117 $ 278 $ 2,062 $ 491
Net income attributable to common stockholders $ 1,117 $ 190 $ 2,062 $ 315
Weighted-average common shares outstanding - basic 1,596 1,608 1,606 1,598
Basic earnings per common share $ 0.70 $ 0.12 $ 1.28 $ 0.20
Diluted earnings per share        
Net income attributable to common stockholders - basic $ 1,117 $ 190 $ 2,062 $ 315
Less: earnings adjustment for dilutive stock compensation rights (4) 0 (1) (14)
Net income attributable to common stockholders - diluted $ 1,113 $ 190 $ 2,061 $ 301
Weighted-average common shares outstanding - basic 1,596 1,608 1,606 1,598
Dilutive effect of warrants and restricted stock units 64 80 67 91
Weighted-average common shares outstanding - diluted 1,660 1,688 1,673 1,689
Diluted earnings per common share $ 0.67 $ 0.11 $ 1.23 $ 0.18
Warrants excluded from computation of diluted EPS (shares)        
Warrants excluded from computation of diluted EPS (shares) 46 46 46 46
Series A Preferred Stock [Member]        
Basic earnings per share        
Less: cumulative dividends on Series A preferred stock   $ (88)   $ (176)
Earned but undeclared dividends   $ 15   $ 15