v2.4.0.6
Operating Segments (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
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        
Community Banking [Member]
         
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      
Wholesale Banking [Member]
         
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      
Wealth Brokerage and Retirement [Member]
         
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      
Other [Member]
         
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)