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Operating Segments (Details) (USD $)
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12 Months Ended | ||||
|---|---|---|---|---|---|
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Dec. 31, 2012
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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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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | $ 43,230,000,000 | $ 42,763,000,000 | $ 44,757,000,000 | ||
| Provision for credit losses | 7,217,000,000 | 7,899,000,000 | 15,753,000,000 | 21,668,000,000 | 15,979,000,000 |
| Noninterest income | 42,856,000,000 | 38,185,000,000 | 40,453,000,000 | ||
| Noninterest expense | 50,398,000,000 | 49,393,000,000 | 50,456,000,000 | ||
| Income (loss) before income tax expense (benefit) | 28,471,000,000 | 23,656,000,000 | 19,001,000,000 | ||
| Income tax benefit | 9,103,000,000 | 7,445,000,000 | 6,338,000,000 | ||
| Net income (loss) before noncontrolling interests | 19,368,000,000 | 16,211,000,000 | 12,663,000,000 | ||
| Less: Net income (loss) from noncontrolling interests | 471,000,000 | 342,000,000 | 301,000,000 | ||
| Net income | 18,897,000,000 | 15,869,000,000 | 12,362,000,000 | ||
| Average loans | 775,200,000,000 | 757,100,000,000 | |||
| Average assets | 1,341,600,000,000 | 1,270,300,000,000 | |||
| Average core deposits | 893,900,000,000 | 826,700,000,000 | |||
| Operating Segment (Textual) [Abstract] | |||||
| Annual sales of wholesale banking customers | 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 | 29,045,000,000 | 29,657,000,000 | 31,885,000,000 | ||
| Provision for credit losses | 6,835,000,000 | 7,976,000,000 | 13,807,000,000 | ||
| Noninterest income | 24,360,000,000 | 21,124,000,000 | 22,604,000,000 | ||
| Noninterest expense | 30,840,000,000 | 29,252,000,000 | 30,071,000,000 | ||
| Income (loss) before income tax expense (benefit) | 15,730,000,000 | 13,553,000,000 | 10,611,000,000 | ||
| Income tax benefit | 4,774,000,000 | 4,104,000,000 | 3,347,000,000 | ||
| Net income (loss) before noncontrolling interests | 10,956,000,000 | 9,449,000,000 | 7,264,000,000 | ||
| Less: Net income (loss) from noncontrolling interests | 464,000,000 | 316,000,000 | 274,000,000 | ||
| Net income | 10,492,000,000 | 9,133,000,000 | 6,990,000,000 | ||
| Average loans | 487,100,000,000 | 496,300,000,000 | |||
| Average assets | 761,100,000,000 | 752,300,000,000 | |||
| Average core deposits | 591,200,000,000 | 556,300,000,000 | |||
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Wholesale Banking [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | 12,648,000,000 | 11,616,000,000 | 11,474,000,000 | ||
| Provision for credit losses | 286,000,000 | (110,000,000) | 1,920,000,000 | ||
| Noninterest income | 11,444,000,000 | 9,952,000,000 | 10,951,000,000 | ||
| Noninterest expense | 12,082,000,000 | 11,177,000,000 | 11,269,000,000 | ||
| Income (loss) before income tax expense (benefit) | 11,724,000,000 | 10,501,000,000 | 9,236,000,000 | ||
| Income tax benefit | 3,943,000,000 | 3,495,000,000 | 3,315,000,000 | ||
| Net income (loss) before noncontrolling interests | 7,781,000,000 | 7,006,000,000 | 5,921,000,000 | ||
| Less: Net income (loss) from noncontrolling interests | 7,000,000 | 19,000,000 | 20,000,000 | ||
| Net income | 7,774,000,000 | 6,987,000,000 | 5,901,000,000 | ||
| Average loans | 273,800,000,000 | 249,100,000,000 | |||
| Average assets | 481,700,000,000 | 428,100,000,000 | |||
| Average core deposits | 227,000,000,000 | 202,100,000,000 | |||
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Wealth Brokerage and Retirement [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | 2,768,000,000 | 2,844,000,000 | 2,707,000,000 | ||
| Provision for credit losses | 125,000,000 | 170,000,000 | 334,000,000 | ||
| Noninterest income | 9,392,000,000 | 9,333,000,000 | 9,023,000,000 | ||
| Noninterest expense | 9,893,000,000 | 9,934,000,000 | 9,768,000,000 | ||
| Income (loss) before income tax expense (benefit) | 2,142,000,000 | 2,073,000,000 | 1,628,000,000 | ||
| Income tax benefit | 814,000,000 | 785,000,000 | 616,000,000 | ||
| Net income (loss) before noncontrolling interests | 1,328,000,000 | 1,288,000,000 | 1,012,000,000 | ||
| Less: Net income (loss) from noncontrolling interests | 0 | 7,000,000 | 7,000,000 | ||
| Net income | 1,328,000,000 | 1,281,000,000 | 1,005,000,000 | ||
| Average loans | 42,700,000,000 | 43,000,000,000 | |||
| Average assets | 164,600,000,000 | 155,200,000,000 | |||
| Average core deposits | 137,500,000,000 | 130,000,000,000 | |||
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Other [Member]
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| Financial Information of Operating Segment [Abstract] | |||||
| Net interest income | (1,231,000,000) | (1,354,000,000) | (1,309,000,000) | ||
| Provision for credit losses | (29,000,000) | (137,000,000) | (308,000,000) | ||
| Noninterest income | (2,340,000,000) | (2,224,000,000) | (2,125,000,000) | ||
| Noninterest expense | (2,417,000,000) | (970,000,000) | (652,000,000) | ||
| Income (loss) before income tax expense (benefit) | (1,125,000,000) | (2,471,000,000) | (2,474,000,000) | ||
| Income tax benefit | (428,000,000) | (939,000,000) | (940,000,000) | ||
| Net income (loss) before noncontrolling interests | (697,000,000) | (1,532,000,000) | (1,534,000,000) | ||
| Less: Net income (loss) from noncontrolling interests | 0 | 0 | 0 | ||
| Net income | (697,000,000) | (1,532,000,000) | (1,534,000,000) | ||
| Average loans | (28,400,000,000) | (31,300,000,000) | |||
| Average assets | (65,800,000,000) | (65,300,000,000) | |||
| Average core deposits | $ (61,800,000,000) | $ (61,700,000,000) | |||