Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Gains and Losses (Details)

v2.4.0.8
Fair Value Measurements - Gains and Losses (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total $ 1,748 $ (419) $ 2,423 $ (345)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 1,319 (1,094) 1,691 (1,813)
Trading Account Assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 47 (18) 390 213
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total (22) (87) 166 13
Corporate securities, trading loans and other [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 35 30 123 123
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 2 (30) [1] 53 (7)
Equity securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 8 (6) 50 9
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 4 (6) (8) 6
Non-U.S. sovereign debt [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total (6) (26) 45 (2)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total (18) (25) 63  
Mortgage trading loans and ABS [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 10 (16) 172 83
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total (10) (26) 58 14
Derivative assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 392 1,110 685 273
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 165 708 2 (599)
Available-for-sale debt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total     4 (10)
Non-Agency Residential MBS [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total       (69)
Corporate/Agency bonds [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total       (2)
Other taxable securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 3   3 7
Tax-exempt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total   28 1 54
Loans and leases [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 49 [2] 51 [2] 100 [1] 215 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 58 [1] 45 [1] 103 [3] 141 [3]
Mortgage servicing rights [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 1,026 (1,592) 1,460 (937)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 954 (1,722) 1,290 (1,252)
Loans held-for-sale [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 19 [2] 10 [2] (20) [1] 179 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 17 [1] (4) [1] (18) [3] 120 [3]
Other assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 121 (102) (327) (134)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 69 (127) 84 (174)
Trading Liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total 6   6  
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total     1  
Corporate securities and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 2   (15) [3]  
Accrued expenses and other liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Total (7) [2] 1 [2] 22 [1] 4 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total (16) [1] (2) [1]   4
Long-term debt [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) (92) [1],[4] (93) [1],[5] (103) [6],[7] 148 [5],[8]
Trading Account Profits (Losses) (92) [1],[4] (93) [1],[5] (103) [6],[7] 148 [5],[8]
Total 92 [2] 93 [2] 103 [1] (148) [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Total 92 [1] 95 [1] 78 [3] (66) [3]
Equity investments [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 34 (21) 36 (11)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) (18) (46) (18) (36)
Equity investments [Member] | Trading Account Assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0   0 0
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 0 0 0 0
Equity investments [Member] | Corporate securities, trading loans and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Equity investments [Member] | Equity securities [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Equity investments [Member] | Non-U.S. sovereign debt [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)           
Equity investments [Member] | Mortgage trading loans and ABS [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Equity investments [Member] | Derivative assets [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Equity investments [Member] | Available-for-sale debt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss)       0
Equity investments [Member] | Other taxable securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0   0 0
Equity investments [Member] | Loans and leases [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1]    [1]    [3]    [3]
Equity investments [Member] | Mortgage servicing rights [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Equity investments [Member] | Loans held-for-sale [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1]    [1]    [3]    [3]
Equity investments [Member] | Other assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 34 (21) 36 (11)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) (18) (46) (18) (36)
Equity investments [Member] | Trading Liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0   0  
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)     0  
Equity investments [Member] | Corporate securities and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 0   0 [3]  
Trading Account Profits (Losses) 0   0 [3]  
Equity investments [Member] | Accrued expenses and other liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)    [2]      [1]  
Trading Account Profits (Losses)    [2]      [1]  
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1]    [1]     
Trading Account Profits (Losses)    [1]    [1]     
Equity investments [Member] | Long-term debt [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1]    [1]    [3]    [3]
Trading Account Profits (Losses)    [1]    [1]    [3]    [3]
Trading Account Profits (Losses) [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Trading Account Profits (Losses) 371 291 622 (990)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Trading Account Profits (Losses) 255 220 235 (1,110)
Trading Account Profits (Losses) [Member] | Trading Account Assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 47 (18) 390 213
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) (22) (87) 166 13
Trading Account Profits (Losses) [Member] | Corporate securities, trading loans and other [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 35 30 123 123
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 2 (30) 53 (7)
Trading Account Profits (Losses) [Member] | Equity securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 8 (6) 50 9
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 4 (6) (8) 6
Trading Account Profits (Losses) [Member] | Non-U.S. sovereign debt [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) (6) (26) 45 (2)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) (18) (25) 63  
Trading Account Profits (Losses) [Member] | Mortgage trading loans and ABS [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 10 (16) 172 83
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) (10) (26) 58 14
Trading Account Profits (Losses) [Member] | Derivative assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 260 229 146 (1,144)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 217 227 13 (1,115)
Trading Account Profits (Losses) [Member] | Available-for-sale debt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss)       0
Trading Account Profits (Losses) [Member] | Other taxable securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0   0 0
Trading Account Profits (Losses) [Member] | Tax-exempt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)   0    
Trading Account Profits (Losses) [Member] | Loans and leases [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1]    [1]    [3]    [3]
Trading Account Profits (Losses) [Member] | Mortgage servicing rights [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Trading Account Profits (Losses) [Member] | Loans held-for-sale [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1]    [1]    [3]    [3]
Trading Account Profits (Losses) [Member] | Other assets [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Trading Account Profits (Losses) [Member] | Trading Liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 6   6  
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)     1  
Trading Account Profits (Losses) [Member] | Corporate securities and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 2   0 [3]  
Trading Account Profits (Losses) 2   0 [3]  
Trading Account Profits (Losses) [Member] | Accrued expenses and other liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)    [2] 0 [2]    [1] 0 [1]
Trading Account Profits (Losses)    [2] 0 [2]    [1] 0 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)    [1] (2) [1]   4
Trading Account Profits (Losses)    [1] (2) [1]   4
Trading Account Profits (Losses) [Member] | Long-term debt [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 58 [2] 80 [2] 80 [1] (59) [1]
Trading Account Profits (Losses) 58 [2] 80 [2] 80 [1] (59) [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 58 [1] 82 [1] 55 [3] (12) [3]
Trading Account Profits (Losses) 58 [1] 82 [1] 55 [3] (12) [3]
Mortgage Banking Income (Loss) [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) 1,276 [9] (740) [9] 2,147 [10] 533 [10]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) 1,016 [9] (1,270) [9] 1,415 [10] (720) [10]
Mortgage Banking Income (Loss) [Member] | Trading Account Assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) 0 [9]   0 [10] 0 [10]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) 0 [9] 0 [9] 0 [10] 0 [10]
Mortgage Banking Income (Loss) [Member] | Corporate securities, trading loans and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)    [9]    [9]    [10]    [10]
Mortgage Banking Income (Loss) [Member] | Equity securities [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)    [9]    [9]    [10]    [10]
Mortgage Banking Income (Loss) [Member] | Non-U.S. sovereign debt [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)    [9]    [9]    [10]  
Mortgage Banking Income (Loss) [Member] | Mortgage trading loans and ABS [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)    [9]    [9]    [10]    [10]
Mortgage Banking Income (Loss) [Member] | Derivative assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) 132 [9] 881 [9] 539 [10] 1,417 [10]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) (52) [9] 481 [9] (11) [10] 516 [10]
Mortgage Banking Income (Loss) [Member] | Available-for-sale debt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss)       0 [10]
Mortgage Banking Income (Loss) [Member] | Other taxable securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)     0 [10]  
Mortgage Banking Income (Loss) 0 [9]      
Mortgage Banking Income (Loss) [Member] | Loans and leases [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)    [1],[9]    [1],[9]    [10],[3]    [10],[3]
Mortgage Banking Income (Loss) [Member] | Mortgage servicing rights [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) 1,026 [9] (1,592) [9] 1,460 [10] (937) [10]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) 954 [9] (1,722) [9] 1,290 [10] (1,252) [10]
Mortgage Banking Income (Loss) [Member] | Loans held-for-sale [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) (2) [2],[9] 5 [2],[9] 2 [1],[10] 95 [1],[10]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) 3 [1],[9] 5 [1],[9] 12 [10],[3] 56 [10],[3]
Mortgage Banking Income (Loss) [Member] | Other assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) 127 [9] (34) [9] 124 [10] (42) [10]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) 127 [9] (34) [9] 139 [10] (40) [10]
Mortgage Banking Income (Loss) [Member] | Trading Liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)     0 [10]  
Mortgage Banking Income (Loss) 0 [9]      
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)     0 [10]  
Mortgage Banking Income (Loss) [Member] | Corporate securities and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) 0 [9]   (15) [10],[3]  
Mortgage Banking Income (Loss) [Member] | Accrued expenses and other liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Mortgage Banking Income (Loss) (7) [2],[9]   22 [1],[10]  
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss) (16) [1],[9]    [1],[9]      [10]
Mortgage Banking Income (Loss) [Member] | Long-term debt [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Mortgage Banking Income (Loss)    [1],[9]    [1],[9]    [10],[3]    [10],[3]
Other Income (loss) [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Other Income (Loss) 67 51 (382) 123
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Other Income (Loss) 66 2 59 53
Other Income (loss) [Member] | Trading Account Assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0   0 0
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 0 0 0 0
Other Income (loss) [Member] | Corporate securities, trading loans and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)       [1]      
Other Income (loss) [Member] | Equity securities [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Other Income (loss) [Member] | Non-U.S. sovereign debt [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)           
Other Income (loss) [Member] | Mortgage trading loans and ABS [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Other Income (loss) [Member] | Derivative assets [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)            
Other Income (loss) [Member] | Available-for-sale debt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)     4 (10)
Other Income (loss) [Member] | Non-Agency Residential MBS [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)       (69)
Other Income (loss) [Member] | Corporate/Agency bonds [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)       (2)
Other Income (loss) [Member] | Other taxable securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 3   3 7
Other Income (loss) [Member] | Tax-exempt securities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss)   28 1 54
Other Income (loss) [Member] | Loans and leases [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 49 [2] 51 [2] 100 [1] 215 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 58 [1] 45 [1] 103 [3] 141 [3]
Other Income (loss) [Member] | Mortgage servicing rights [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 0    0   
Other Income (loss) [Member] | Loans held-for-sale [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 21 [2] 5 [2] (22) [1] 84 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 14 [1] (9) [1] (30) [3] 64 [3]
Other Income (loss) [Member] | Other assets [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) (40) (47) (487) (81)
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) (40) (47) (37) (98)
Other Income (loss) [Member] | Trading Liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0   0  
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss)     0  
Other Income (loss) [Member] | Corporate securities and other [Member]
        
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 0   0 [3]  
Trading Account Profits (Losses) 0   0 [3]  
Other Income (loss) [Member] | Accrued expenses and other liabilities [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 0 [2] 1 [2] 0 [1] 4 [1]
Trading Account Profits (Losses) 0 [2] 1 [2] 0 [1] 4 [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 0 [1] 0 [1]   0
Trading Account Profits (Losses) 0 [1] 0 [1]   0
Other Income (loss) [Member] | Long-term debt [Member]
        
Level 3 Total Realized and Unrealized Gains (Losses) Related to Assets Included in Earnings        
Equity Investment Income (Loss) 34 [2] 13 [2] 23 [1] (89) [1]
Trading Account Profits (Losses) 34 [2] 13 [2] 23 [1] (89) [1]
Level 3 Changes in Unrealized Gains (Losses) Relating to Assets Still Held at Reporting Date        
Equity Investment Income (Loss) 34 [1] 13 [1] 23 [3] (54) [3]
Trading Account Profits (Losses) $ 34 [1] $ 13 [1] $ 23 [3] $ (54) [3]
[1] Amounts represent instruments that are accounted for under the fair value option.
[2] Amounts represent instruments that are accounted for under the fair value option.Level 3 – Total Realized and Unrealized Gains (Losses) Included in Earnings Six Months Ended June 30, 2013(Dollars in millions)EquityInvestmentIncome(Loss) TradingAccountProfits(Losses) MortgageBankingIncome(Loss) (1) OtherIncome(Loss) TotalTrading account assets: Corporate securities, trading loans and other$— $123 $— $— $123Equity securities— 50 — — 50Non-U.S. sovereign debt— 45 — — 45Mortgage trading loans and ABS— 172 — — 172Total trading account assets— 390 — — 390Net derivative assets— 146 539 — 685AFS debt securities: Other taxable securities— — — 3 3Tax-exempt securities— — — 1 1Total AFS debt securities— — — 4 4Loans and leases (2)— — — 100 100Mortgage servicing rights— — 1,460 — 1,460Loans held-for-sale (2)— — 2 (22) (20)Other assets36 — 124 (487) (327)Trading account liabilities – Corporate securities and other— 6 — — 6Accrued expenses and other liabilities (2)— — 22 — 22Long-term debt (2)— 80 — 23 103Total$36 $622 $2,147 $(382) $2,423 Six Months Ended June 30, 2012Trading account assets: Corporate securities, trading loans and other$— $123 $— $— $123Equity securities— 9 — — 9Non-U.S. sovereign debt— (2) — — (2)Mortgage trading loans and ABS— 83 — — 83Total trading account assets— 213 — — 213Net derivative assets— (1,144) 1,417 — 273AFS debt securities: Non-agency residential MBS— — — (69) (69)Corporate/Agency bonds— — — (2) (2)Other taxable securities— — — 7 7Tax-exempt securities— — — 54 54Total AFS debt securities— — — (10) (10)Loans and leases (2)— — — 215 215Mortgage servicing rights— — (937) — (937)Loans held-for-sale (2)— — 95 84 179Other assets(11) — (42) (81) (134)Accrued expenses and other liabilities (2)— — — 4 4Long-term debt (2)— (59) — (89) (148)Total$(11) $(990) $533 $123 $(345)
[3] (2) Amounts represent instruments that are accounted for under the fair value option.
[4] Assets (liabilities). For assets, increase / (decrease) to Level 3 and for liabilities, (increase) / decrease to Level 3.
[5] Assets (liabilities). For assets, increase / (decrease) to Level 3 and for liabilities, (increase) / decrease to Level 3.
[6] (1) Assets (liabilities). For assets, increase / (decrease) to Level 3 and for liabilities, (increase) / decrease to Level 3.
[7] (3) Amounts represent instruments that are accounted for under the fair value option.
[8] (4) Amounts represent instruments that are accounted for under the fair value option.
[9] Mortgage banking income does not reflect the impact of Level 1 and Level 2 hedges on MSRs.
[10] (1) Mortgage banking income does not reflect the impact of Level 1 and Level 2 hedges on MSRs.