v2.4.0.6
Operating Segment (Details) (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Financial Information of Operating Segment [Abstract]    
Net interest income $ 10,888,000,000 $ 10,651,000,000
Provision for credit losses 1,995,000,000 2,210,000,000
Noninterest income 10,748,000,000 9,678,000,000
Total noninterest expense 12,993,000,000 12,733,000,000
Income (loss) before income tax expense (benefit) 6,648,000,000 5,386,000,000
Income tax expense (benefit) 2,328,000,000 1,572,000,000
Net income (loss) before noncontrolling interests 4,320,000,000 3,814,000,000
Less: Net income (loss) from noncontrolling interests 72,000,000 55,000,000
Net income (loss) 4,248,000,000 3,759,000,000
Average loans 768,600,000,000 754,100,000,000
Average assets 1,302,900,000,000 1,241,200,000,000
Average core deposits 870,500,000,000 796,800,000,000
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  
Community Banking [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income 7,326,000,000 7,575,000,000
Provision for credit losses 1,878,000,000 2,061,000,000
Noninterest income 6,095,000,000 5,082,000,000
Total noninterest expense 7,825,000,000 7,622,000,000
Income (loss) before income tax expense (benefit) 3,718,000,000 2,974,000,000
Income tax expense (benefit) 1,293,000,000 745,000,000
Net income (loss) before noncontrolling interests 2,425,000,000 2,229,000,000
Less: Net income (loss) from noncontrolling interests 77,000,000 49,000,000
Net income (loss) 2,348,000,000 2,180,000,000
Average loans 486,100,000,000 508,400,000,000
Average assets 738,300,000,000 756,700,000,000
Average core deposits 575,200,000,000 548,100,000,000
Wholesale Banking [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income 3,181,000,000 2,718,000,000
Provision for credit losses 95,000,000 134,000,000
Noninterest income 2,852,000,000 2,704,000,000
Total noninterest expense 3,054,000,000 2,789,000,000
Income (loss) before income tax expense (benefit) 2,884,000,000 2,499,000,000
Income tax expense (benefit) 1,016,000,000 862,000,000
Net income (loss) before noncontrolling interests 1,868,000,000 1,637,000,000
Less: Net income (loss) from noncontrolling interests 0 2,000,000
Net income (loss) 1,868,000,000 1,635,000,000
Average loans 268,600,000,000 234,700,000,000
Average assets 467,800,000,000 398,800,000,000
Average core deposits 220,900,000,000 184,800,000,000
Wealth Brokerage and Retirement [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income 701,000,000 700,000,000
Provision for credit losses 43,000,000 40,000,000
Noninterest income 2,361,000,000 2,454,000,000
Total noninterest expense 2,547,000,000 2,557,000,000
Income (loss) before income tax expense (benefit) 472,000,000 557,000,000
Income tax expense (benefit) 181,000,000 210,000,000
Net income (loss) before noncontrolling interests 291,000,000 347,000,000
Less: Net income (loss) from noncontrolling interests (5,000,000) 4,000,000
Net income (loss) 296,000,000 343,000,000
Average loans 42,500,000,000 42,700,000,000
Average assets 161,900,000,000 150,700,000,000
Average core deposits 135,600,000,000 125,400,000,000
Other Segments [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income (320,000,000) (342,000,000)
Provision for credit losses (21,000,000) (25,000,000)
Noninterest income (560,000,000) (562,000,000)
Total noninterest expense (433,000,000) (235,000,000)
Income (loss) before income tax expense (benefit) (426,000,000) (644,000,000)
Income tax expense (benefit) (162,000,000) (245,000,000)
Net income (loss) before noncontrolling interests (264,000,000) (399,000,000)
Less: Net income (loss) from noncontrolling interests 0 0
Net income (loss) (264,000,000) (399,000,000)
Average loans (28,600,000,000) (31,700,000,000)
Average assets (65,100,000,000) (65,000,000,000)
Average core deposits $ (61,200,000,000) $ (61,500,000,000)