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Operating Segment (Details) (USD $)
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12 Months Ended | ||||
|---|---|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2008
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Dec. 31, 2007
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | $ 42,763,000,000 | $ 44,757,000,000 | $ 46,324,000,000 | ||
| Provision for credit losses | 7,899,000,000 | 15,753,000,000 | 21,668,000,000 | 15,979,000,000 | 4,939,000,000 |
| Noninterest income | 38,185,000,000 | 40,453,000,000 | 42,362,000,000 | ||
| Total noninterest expense | 49,393,000,000 | 50,456,000,000 | 49,020,000,000 | ||
| Income (loss) before income tax expense (benefit) | 23,656,000,000 | 19,001,000,000 | 17,998,000,000 | ||
| Income tax expense (benefit) | 7,445,000,000 | 6,338,000,000 | 5,331,000,000 | ||
| Net income (loss) before noncontrolling interests | 16,211,000,000 | 12,663,000,000 | 12,667,000,000 | ||
| Less: Net income from noncontrolling interests | 342,000,000 | 301,000,000 | 392,000,000 | ||
| Net income (loss) | 15,869,000,000 | 12,362,000,000 | 12,275,000,000 | ||
| Average loans | 757,100,000,000 | 770,600,000,000 | |||
| Average assets | 1,270,300,000,000 | 1,226,900,000,000 | |||
| Average core deposits | 826,700,000,000 | 772,000,000,000 | |||
| Operating Segment (Textual) [Abstract] | |||||
| Annual sales of wholesale banking businesses | in excess of $20 million | ||||
| Annual sales of small business community banking customers | up to $20 million | ||||
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Community Banking [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | 29,580,000,000 | 31,885,000,000 | 34,795,000,000 | ||
| Provision for credit losses | 8,001,000,000 | 13,807,000,000 | 17,866,000,000 | ||
| Noninterest income | 21,124,000,000 | 22,604,000,000 | 25,651,000,000 | ||
| Total noninterest expense | 29,234,000,000 | 30,071,000,000 | 29,928,000,000 | ||
| Income (loss) before income tax expense (benefit) | 13,469,000,000 | 10,611,000,000 | 12,652,000,000 | ||
| Income tax expense (benefit) | 4,072,000,000 | 3,347,000,000 | 3,443,000,000 | ||
| Net income (loss) before noncontrolling interests | 9,397,000,000 | 7,264,000,000 | 9,209,000,000 | ||
| Less: Net income from noncontrolling interests | 317,000,000 | 274,000,000 | 331,000,000 | ||
| Net income (loss) | 9,080,000,000 | 6,990,000,000 | 8,878,000,000 | ||
| Average loans | 498,100,000,000 | 530,100,000,000 | |||
| Average assets | 755,700,000,000 | 772,400,000,000 | |||
| Average core deposits | 556,200,000,000 | 536,400,000,000 | |||
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Wholesale Banking [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | 11,714,000,000 | 11,474,000,000 | 10,222,000,000 | ||
| Provision for credit losses | (109,000,000) | 1,920,000,000 | 3,648,000,000 | ||
| Noninterest income | 9,952,000,000 | 10,951,000,000 | 10,411,000,000 | ||
| Total noninterest expense | 11,194,000,000 | 11,269,000,000 | 10,799,000,000 | ||
| Income (loss) before income tax expense (benefit) | 10,581,000,000 | 9,236,000,000 | 6,186,000,000 | ||
| Income tax expense (benefit) | 3,525,000,000 | 3,315,000,000 | 2,217,000,000 | ||
| Net income (loss) before noncontrolling interests | 7,056,000,000 | 5,921,000,000 | 3,969,000,000 | ||
| Less: Net income from noncontrolling interests | 19,000,000 | 20,000,000 | 35,000,000 | ||
| Net income (loss) | 7,037,000,000 | 5,901,000,000 | 3,934,000,000 | ||
| Average loans | 249,100,000,000 | 230,500,000,000 | |||
| Average assets | 428,100,000,000 | 373,800,000,000 | |||
| Average core deposits | 202,100,000,000 | 170,000,000,000 | |||
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Wealth Brokerage and Retirement [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | 2,855,000,000 | 2,707,000,000 | 2,407,000,000 | ||
| Provision for credit losses | 170,000,000 | 334,000,000 | 460,000,000 | ||
| Noninterest income | 9,333,000,000 | 9,023,000,000 | 8,358,000,000 | ||
| Total noninterest expense | 9,935,000,000 | 9,768,000,000 | 9,426,000,000 | ||
| Income (loss) before income tax expense (benefit) | 2,083,000,000 | 1,628,000,000 | 879,000,000 | ||
| Income tax expense (benefit) | 789,000,000 | 616,000,000 | 324,000,000 | ||
| Net income (loss) before noncontrolling interests | 1,294,000,000 | 1,012,000,000 | 555,000,000 | ||
| Less: Net income from noncontrolling interests | 6,000,000 | 7,000,000 | 26,000,000 | ||
| Net income (loss) | 1,288,000,000 | 1,005,000,000 | 529,000,000 | ||
| Average loans | 43,000,000,000 | 43,000,000,000 | |||
| Average assets | 152,200,000,000 | 139,300,000,000 | |||
| Average core deposits | 130,400,000,000 | 121,200,000,000 | |||
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Other Segments [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | (1,386,000,000) | (1,309,000,000) | (1,100,000,000) | ||
| Provision for credit losses | (163,000,000) | (308,000,000) | (306,000,000) | ||
| Noninterest income | (2,224,000,000) | (2,125,000,000) | (2,058,000,000) | ||
| Total noninterest expense | (970,000,000) | (652,000,000) | (1,133,000,000) | ||
| Income (loss) before income tax expense (benefit) | (2,477,000,000) | (2,474,000,000) | (1,719,000,000) | ||
| Income tax expense (benefit) | (941,000,000) | (940,000,000) | (653,000,000) | ||
| Net income (loss) before noncontrolling interests | (1,536,000,000) | (1,534,000,000) | (1,066,000,000) | ||
| Less: Net income from noncontrolling interests | 0 | 0 | 0 | ||
| Net income (loss) | (1,536,000,000) | (1,534,000,000) | (1,066,000,000) | ||
| Average loans | (33,100,000,000) | (33,000,000,000) | |||
| Average assets | (65,700,000,000) | (58,600,000,000) | |||
| Average core deposits | $ (62,000,000,000) | $ (55,600,000,000) | |||