v2.4.0.6
Operating Segments (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Financial Information of Operating Segment [Abstract]    
Net interest income $ 10,499,000,000 $ 10,888,000,000
Provision (reversal of provision) for credit losses 1,219,000,000 1,995,000,000
Noninterest income 10,760,000,000 10,748,000,000
Noninterest expense 12,400,000,000 12,993,000,000
Income (loss) before income tax expense (benefit) 7,640,000,000 6,648,000,000
Income Tax Expense (Benefit) 2,420,000,000 2,328,000,000
Net income (loss) before noncontrolling interests 5,220,000,000 4,320,000,000
Less: Net income from noncontrolling interests 49,000,000 72,000,000
Net income 5,171,000,000 4,248,000,000
Average loans 798,100,000,000 768,600,000,000
Average assets 1,404,300,000,000 1,302,900,000,000
Average core deposits 925,900,000,000 870,500,000,000
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 7,119,000,000 7,326,000,000
Provision (reversal of provision) for credit losses 1,262,000,000 1,878,000,000
Noninterest income 5,780,000,000 6,095,000,000
Noninterest expense 7,377,000,000 7,825,000,000
Income (loss) before income tax expense (benefit) 4,260,000,000 3,718,000,000
Income Tax Expense (Benefit) 1,288,000,000 1,293,000,000
Net income (loss) before noncontrolling interests 2,972,000,000 2,425,000,000
Less: Net income from noncontrolling interests 48,000,000 77,000,000
Net income 2,924,000,000 2,348,000,000
Average loans 498,900,000,000 486,100,000,000
Average assets 799,600,000,000 738,300,000,000
Average core deposits 619,200,000,000 575,200,000,000
Wholesale Banking [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income 3,005,000,000 3,181,000,000
Provision (reversal of provision) for credit losses (58,000,000) 95,000,000
Noninterest income 3,081,000,000 2,852,000,000
Noninterest expense 3,091,000,000 3,054,000,000
Income (loss) before income tax expense (benefit) 3,053,000,000 2,884,000,000
Income Tax Expense (Benefit) 1,007,000,000 1,016,000,000
Net income (loss) before noncontrolling interests 2,046,000,000 1,868,000,000
Less: Net income from noncontrolling interests 1,000,000 0
Net income 2,045,000,000 1,868,000,000
Average loans 284,500,000,000 268,600,000,000
Average assets 496,100,000,000 467,800,000,000
Average core deposits 224,100,000,000 220,900,000,000
Wealth Brokerage and Retirement [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income 669,000,000 701,000,000
Provision (reversal of provision) for credit losses 14,000,000 43,000,000
Noninterest income 2,528,000,000 2,361,000,000
Noninterest expense 2,639,000,000 2,547,000,000
Income (loss) before income tax expense (benefit) 544,000,000 472,000,000
Income Tax Expense (Benefit) 207,000,000 181,000,000
Net income (loss) before noncontrolling interests 337,000,000 291,000,000
Less: Net income from noncontrolling interests 0 (5,000,000)
Net income 337,000,000 296,000,000
Average loans 43,800,000,000 42,500,000,000
Average assets 180,300,000,000 161,900,000,000
Average core deposits 149,400,000,000 135,600,000,000
Other [Member]
    
Financial Information of Operating Segment [Abstract]    
Net interest income (294,000,000) (320,000,000)
Provision (reversal of provision) for credit losses 1,000,000 (21,000,000)
Noninterest income (629,000,000) (560,000,000)
Noninterest expense (707,000,000) (433,000,000)
Income (loss) before income tax expense (benefit) (217,000,000) (426,000,000)
Income Tax Expense (Benefit) (82,000,000) (162,000,000)
Net income (loss) before noncontrolling interests (135,000,000) (264,000,000)
Less: Net income from noncontrolling interests 0 0
Net income (135,000,000) (264,000,000)
Average loans (29,100,000,000) (28,600,000,000)
Average assets (71,700,000,000) (65,100,000,000)
Average core deposits $ (66,800,000,000) $ (61,200,000,000)