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Parent Company (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Non-interest revenues |  |  |  |  |  |  |  |  |  |  |
Gain on sale of securities |  |  |  |  |  |  |  |  | $ 16 | $ (5) | $ 225
Other revenue |  |  |  |  |  |  |  |  | 2,164 | 1,927 | 2,090
Total non-interest revenues |  |  |  |  |  |  |  |  | 25,321 | 22,713 | 21,212
Interest income |  |  |  |  |  |  |  |  | 6,961 | 7,292 | 5,331
Interest expense |  |  |  |  |  |  |  |  | (2,320) | (2,423) | (2,207)
Expenses |  |  |  |  |  |  |  |  |  |  |
Salaries and employee benefits |  |  |  |  |  |  |  |  | 6,252 | 5,566 | 5,080
Other |  |  |  |  |  |  |  |  | 2,761 | 2,301 | 2,131
Total |  |  |  |  |  |  |  |  | 21,894 | 19,411 | 16,182
Pretax loss | 1,748 | 1,711 | 1,765 | 1,732 | 1,477 | 1,640 | 1,595 | 1,252 | 6,956 | 5,964 | 2,841
Income tax provision |  |  |  |  |  |  |  |  | 2,057 | 1,907 | 704
Income from continuing operations | 1,192 | 1,235 | 1,295 | 1,177 | 1,062 | 1,093 | 1,017 | 885 | 4,899 | 4,057 | 2,137
Income (loss) from discontinued operations, net of tax | 0 | 0 | (36) | 0 | 0 | 0 | 0 | 0 | (36) | 0 | 7
Net income | 1,192 | 1,235 | 1,331 | 1,177 | 1,062 | 1,093 | 1,017 | 885 | 4,935 | 4,057 | 2,130
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |
Non-interest revenues |  |  |  |  |  |  |  |  |  |  |
Gain on sale of securities |  |  |  |  |  |  |  |  | 15 | 0 | 211
Other revenue |  |  |  |  |  |  |  |  | 3 | 8 | 4
Total non-interest revenues |  |  |  |  |  |  |  |  | 18 | 8 | 215
Interest income |  |  |  |  |  |  |  |  | 142 | 136 | 142
Interest expense |  |  |  |  |  |  |  |  | 633 | 638 | 562
Total revenues net of interest expense |  |  |  |  |  |  |  |  | (473) | (494) | (205)
Expenses |  |  |  |  |  |  |  |  |  |  |
Salaries and employee benefits |  |  |  |  |  |  |  |  | 173 | 153 | 111
Other |  |  |  |  |  |  |  |  | 186 | 117 | 161
Total |  |  |  |  |  |  |  |  | 359 | 270 | 272
Pretax loss |  |  |  |  |  |  |  |  | (832) | (764) | (477)
Income tax provision |  |  |  |  |  |  |  |  | (346) | (292) | (164)
Net loss before equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | (486) | (472) | (313)
Equity in net income of subsidiaries and affiliates |  |  |  |  |  |  |  |  | 5,385 | 4,529 | 2,450
Income from continuing operations |  |  |  |  |  |  |  |  | 4,899 | 4,057 | 2,137
Income (loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  | (36) | 0 | 7
Net income |  |  |  |  |  |  |  |  | $ 4,935 | $ 4,057 | $ 2,130

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