v2.4.0.8
Operating Segments (Details) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Financial Information of Operating Segment [Abstract]        
Net interest income $ 10,750,000,000 $ 11,037,000,000 $ 21,249,000,000 $ 21,925,000,000
Provision (reversal of provision) for credit losses 652,000,000 1,800,000,000 1,871,000,000 3,795,000,000
Noninterest income 10,628,000,000 10,252,000,000 21,388,000,000 21,000,000,000
Noninterest expense 12,255,000,000 12,397,000,000 24,655,000,000 25,390,000,000
Income (loss) before income tax expense (benefit) 8,471,000,000 7,092,000,000 16,111,000,000 13,740,000,000
Income Tax Expense (Benefit) 2,863,000,000 2,371,000,000 5,283,000,000 4,699,000,000
Net income (loss) before noncontrolling interests 5,608,000,000 4,721,000,000 10,828,000,000 9,041,000,000
Less: Net income from noncontrolling interests 89,000,000 99,000,000 138,000,000 171,000,000
Net income 5,519,000,000 4,622,000,000 10,690,000,000 8,870,000,000
Average loans 800,200,000,000 768,200,000,000 799,200,000,000 768,400,000,000
Average assets 1,429,000,000,000 1,321,600,000,000 1,416,700,000,000 1,312,300,000,000
Average core deposits 936,100,000,000 880,600,000,000 931,000,000,000 875,600,000,000
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  
Community Banking [Member]
        
Financial Information of Operating Segment [Abstract]        
Net interest income 7,251,000,000 7,306,000,000 14,370,000,000 14,632,000,000
Provision (reversal of provision) for credit losses 763,000,000 1,573,000,000 2,025,000,000 3,451,000,000
Noninterest income 5,691,000,000 5,786,000,000 11,471,000,000 11,881,000,000
Noninterest expense 7,213,000,000 7,580,000,000 14,590,000,000 15,405,000,000
Income (loss) before income tax expense (benefit) 4,966,000,000 3,939,000,000 9,226,000,000 7,657,000,000
Income Tax Expense (Benefit) 1,633,000,000 1,313,000,000 2,921,000,000 2,606,000,000
Net income (loss) before noncontrolling interests 3,333,000,000 2,626,000,000 6,305,000,000 5,051,000,000
Less: Net income from noncontrolling interests 88,000,000 91,000,000 136,000,000 168,000,000
Net income 3,245,000,000 2,535,000,000 6,169,000,000 4,883,000,000
Average loans 498,200,000,000 483,900,000,000 498,600,000,000 485,000,000,000
Average assets 820,900,000,000 746,600,000,000 810,300,000,000 742,500,000,000
Average core deposits 623,000,000,000 586,100,000,000 621,100,000,000 580,700,000,000
Wholesale Banking [Member]
        
Financial Information of Operating Segment [Abstract]        
Net interest income 3,101,000,000 3,347,000,000 6,106,000,000 6,528,000,000
Provision (reversal of provision) for credit losses (118,000,000) 188,000,000 (176,000,000) 283,000,000
Noninterest income 3,034,000,000 2,770,000,000 6,115,000,000 5,622,000,000
Noninterest expense 3,183,000,000 3,113,000,000 6,274,000,000 6,167,000,000
Income (loss) before income tax expense (benefit) 3,070,000,000 2,816,000,000 6,123,000,000 5,700,000,000
Income Tax Expense (Benefit) 1,065,000,000 932,000,000 2,072,000,000 1,948,000,000
Net income (loss) before noncontrolling interests 2,005,000,000 1,884,000,000 4,051,000,000 3,752,000,000
Less: Net income from noncontrolling interests 1,000,000 3,000,000 2,000,000 3,000,000
Net income 2,004,000,000 1,881,000,000 4,049,000,000 3,749,000,000
Average loans 286,900,000,000 270,200,000,000 285,700,000,000 269,400,000,000
Average assets 499,900,000,000 478,400,000,000 498,000,000,000 473,100,000,000
Average core deposits 230,500,000,000 220,900,000,000 227,300,000,000 220,900,000,000
Wealth Brokerage and Retirement [Member]
        
Financial Information of Operating Segment [Abstract]        
Net interest income 700,000,000 698,000,000 1,369,000,000 1,399,000,000
Provision (reversal of provision) for credit losses 19,000,000 37,000,000 33,000,000 80,000,000
Noninterest income 2,561,000,000 2,273,000,000 5,089,000,000 4,634,000,000
Noninterest expense 2,542,000,000 2,376,000,000 5,181,000,000 4,923,000,000
Income (loss) before income tax expense (benefit) 700,000,000 558,000,000 1,244,000,000 1,030,000,000
Income Tax Expense (Benefit) 266,000,000 210,000,000 473,000,000 391,000,000
Net income (loss) before noncontrolling interests 434,000,000 348,000,000 771,000,000 639,000,000
Less: Net income from noncontrolling interests 0 5,000,000 0 0
Net income 434,000,000 343,000,000 771,000,000 639,000,000
Average loans 45,400,000,000 42,500,000,000 44,600,000,000 42,500,000,000
Average assets 177,100,000,000 160,900,000,000 178,700,000,000 161,400,000,000
Average core deposits 146,400,000,000 134,200,000,000 147,900,000,000 134,900,000,000
Other [Member]
        
Financial Information of Operating Segment [Abstract]        
Net interest income (302,000,000) (314,000,000) (596,000,000) (634,000,000)
Provision (reversal of provision) for credit losses (12,000,000) 2,000,000 (11,000,000) (19,000,000)
Noninterest income (658,000,000) (577,000,000) (1,287,000,000) (1,137,000,000)
Noninterest expense (683,000,000) (672,000,000) (1,390,000,000) (1,105,000,000)
Income (loss) before income tax expense (benefit) (265,000,000) (221,000,000) (482,000,000) (647,000,000)
Income Tax Expense (Benefit) (101,000,000) (84,000,000) (183,000,000) (246,000,000)
Net income (loss) before noncontrolling interests (164,000,000) (137,000,000) (299,000,000) (401,000,000)
Less: Net income from noncontrolling interests 0 0 0 0
Net income (164,000,000) (137,000,000) (299,000,000) (401,000,000)
Average loans (30,300,000,000) (28,400,000,000) (29,700,000,000) (28,500,000,000)
Average assets (68,900,000,000) (64,300,000,000) (70,300,000,000) (64,700,000,000)
Average core deposits $ (63,800,000,000) $ (60,600,000,000) $ (65,300,000,000) $ (60,900,000,000)