v2.4.0.8
Quarterly Financial Data (Unaudited) (Details) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Disclosure of quarterly financial data                      
Total revenues net of interest expense $ 8,547,000,000 $ 8,301,000,000 $ 8,245,000,000 $ 7,881,000,000 $ 8,141,000,000 $ 7,862,000,000 $ 7,965,000,000 $ 7,587,000,000 $ 32,974,000,000 $ 31,555,000,000 $ 29,962,000,000
Pretax income from continuing operations 1,980,000,000 2,004,000,000 1,995,000,000 1,909,000,000 929,000,000 1,870,000,000 1,879,000,000 1,773,000,000 7,888,000,000 6,451,000,000 6,956,000,000
Income from continuing operations                 5,359,000,000 4,482,000,000 4,899,000,000
Income from discontinued operations                 0 0 36,000,000
Net income attributable to common shareholders 1,308,000,000 1,366,000,000 1,405,000,000 1,280,000,000 637,000,000 1,250,000,000 1,339,000,000 1,256,000,000 5,359,000,000 4,482,000,000 4,935,000,000
Earnings per Common Share Basic: (Note 18)                      
Income from continuing operations attributable to common shareholders $ 1.22 $ 1.26 $ 1.28 $ 1.15 $ 0.57 $ 1.10 $ 1.16 $ 1.07 $ 4.91 $ 3.91 $ 4.11
Income from discontinued operations                 $ 0 $ 0 $ 0.03
Net income attributable to common shareholders                 $ 4.91 $ 3.91 $ 4.14
Earnings per Common Share Diluted: (Note 18)                      
Continuing operations $ 1.21 $ 1.25 $ 1.27 $ 1.15 $ 0.56 $ 1.09 $ 1.15 $ 1.07 $ 4.88 $ 3.89 $ 4.09
Income from discontinued operations                 $ 0 $ 0 $ 0.03
Net income attributable to common shareholders                 $ 4.88 $ 3.89 $ 4.12
Cash dividends declared per common share $ 0.23 $ 0.23 $ 0.23 $ 0.20 $ 0.20 $ 0.20 $ 0.20 $ 0.20 $ 0.89 $ 0.80 $ 0.72
Common share price:                      
High 90.79 78.63 78.61 67.48 59.40 59.73 61.42 59.26      
Low $ 72.08 $ 71.47 $ 63.43 $ 58.31 $ 53.02 $ 54.35 $ 53.18 $ 47.40