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Parent Company (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Non-interest revenues |  |  |  |  |  |  |  |  |  |  |
Gain on sale of securities |  |  |  |  |  |  |  |  | $ 126 | $ 16 | $ (5)
Total other revenues |  |  |  |  |  |  |  |  | 2,452 | 2,164 | 1,927
Total non-interest revenues |  |  |  |  |  |  |  |  | 26,954 | 25,586 | 22,932
Interest income |  |  |  |  |  |  |  |  | 6,854 | 6,696 | 7,073
Interest expense |  |  |  |  |  |  |  |  | (2,226) | (2,320) | (2,423)
Expenses |  |  |  |  |  |  |  |  |  |  |
Salaries and employee benefits |  |  |  |  |  |  |  |  | 6,597 | 6,252 | 5,566
Other, net |  |  |  |  |  |  |  |  | 6,573 | 5,712 | 5,107
Total |  |  |  |  |  |  |  |  | 23,141 | 21,894 | 19,411
Pretax loss | 929 | 1,870 | 1,879 | 1,773 | 1,748 | 1,711 | 1,765 | 1,732 | 6,451 | 6,956 | 5,964
Income tax benefit |  |  |  |  |  |  |  |  | 1,969 | 2,057 | 1,907
Income from continuing operations | 637 | 1,250 | 1,339 | 1,256 | 1,192 | 1,235 | 1,295 | 1,177 | 4,482 | 4,899 | 4,057
Income from discontinued operations, net of tax | 0 | 0 | 0 | 0 | 0 | 0 | (36) | 0 | 0 | (36) | 0
Net income | 637 | 1,250 | 1,339 | 1,256 | 1,192 | 1,235 | 1,331 | 1,177 | 4,482 | 4,935 | 4,057
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Non-interest revenues |  |  |  |  |  |  |  |  |  |  |
Gain on sale of securities |  |  |  |  |  |  |  |  | 121 | 15 | 0
Total other revenues |  |  |  |  |  |  |  |  | (12) | 3 | 8
Total non-interest revenues |  |  |  |  |  |  |  |  | 109 | 18 | 8
Interest income |  |  |  |  |  |  |  |  | 137 | 142 | 136
Interest expense |  |  |  |  |  |  |  |  | (609) | (633) | (638)
Total revenues net of interest expense |  |  |  |  |  |  |  |  | (363) | (473) | (494)
Expenses |  |  |  |  |  |  |  |  |  |  |
Salaries and employee benefits |  |  |  |  |  |  |  |  | 165 | 173 | 153
Other, net |  |  |  |  |  |  |  |  | 214 | 186 | 117
Total |  |  |  |  |  |  |  |  | 379 | 359 | 270
Pretax loss |  |  |  |  |  |  |  |  | (742) | (832) | (764)
Income tax benefit |  |  |  |  |  |  |  |  | (258) | (346) | (292)
Net loss before equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | (484) | (486) | (472)
Equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | 4,966 | 5,385 | 4,529
Income from continuing operations |  |  |  |  |  |  |  |  | 4,482 | 4,899 | 4,057
Income from discontinued operations, net of tax |  |  |  |  |  |  |  |  | 0 | 36 | 0
Net income |  |  |  |  |  |  |  |  | $ 4,482 | $ 4,935 | $ 4,057

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