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FAIR VALUE MEASUREMENT (Details) (USD $)
9 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2012
score
Dec. 31, 2011
Sep. 30, 2012
Recurring
Sep. 30, 2012
Recurring
Sep. 30, 2012
Recurring
Level 1
Dec. 31, 2011
Recurring
Level 1
Dec. 31, 2011
Recurring
Level 1
Interest rate contracts
Sep. 30, 2012
Recurring
Level 1
Foreign exchange contracts
Sep. 30, 2012
Recurring
Level 1
Equity contracts
Dec. 31, 2011
Recurring
Level 1
Equity contracts
Sep. 30, 2012
Recurring
Level 1
Commodity contracts
Dec. 31, 2011
Recurring
Level 1
Commodity contracts
Sep. 30, 2012
Recurring
Level 1
Mortgage-backed securities
Dec. 31, 2011
Recurring
Level 1
Mortgage-backed securities
Sep. 30, 2012
Recurring
Level 1
U.S. government-sponsored agency guaranteed
Dec. 31, 2011
Recurring
Level 1
U.S. government-sponsored agency guaranteed
Sep. 30, 2012
Recurring
Level 1
U.S. Treasury and federal agency securities
Dec. 31, 2011
Recurring
Level 1
U.S. Treasury and federal agency securities
Sep. 30, 2012
Recurring
Level 1
U.S. Treasury
Dec. 31, 2011
Recurring
Level 1
U.S. Treasury
Sep. 30, 2012
Recurring
Level 1
Foreign government
Dec. 31, 2011
Recurring
Level 1
Foreign government
Sep. 30, 2012
Recurring
Level 1
Equity securities
Dec. 31, 2011
Recurring
Level 1
Equity securities
Sep. 30, 2012
Recurring
Level 2
Dec. 31, 2011
Recurring
Level 2
Sep. 30, 2012
Recurring
Level 2
Interest rate contracts
Dec. 31, 2011
Recurring
Level 2
Interest rate contracts
Sep. 30, 2012
Recurring
Level 2
Foreign exchange contracts
Dec. 31, 2011
Recurring
Level 2
Foreign exchange contracts
Sep. 30, 2012
Recurring
Level 2
Equity contracts
Dec. 31, 2011
Recurring
Level 2
Equity contracts
Sep. 30, 2012
Recurring
Level 2
Commodity contracts
Dec. 31, 2011
Recurring
Level 2
Commodity contracts
Sep. 30, 2012
Recurring
Level 2
Credit derivatives
Dec. 31, 2011
Recurring
Level 2
Credit derivatives
Sep. 30, 2012
Recurring
Level 2
Mortgage-backed securities
Dec. 31, 2011
Recurring
Level 2
Mortgage-backed securities
Sep. 30, 2012
Recurring
Level 2
U.S. government-sponsored agency guaranteed
Dec. 31, 2011
Recurring
Level 2
U.S. government-sponsored agency guaranteed
Sep. 30, 2012
Recurring
Level 2
Prime
Dec. 31, 2011
Recurring
Level 2
Prime
Sep. 30, 2012
Recurring
Level 2
Alt-A
Dec. 31, 2011
Recurring
Level 2
Alt-A
Sep. 30, 2012
Recurring
Level 2
Subprime
Dec. 31, 2011
Recurring
Level 2
Subprime
Sep. 30, 2012
Recurring
Level 2
Non-U.S. residential
Dec. 31, 2011
Recurring
Level 2
Non-U.S. residential
Sep. 30, 2012
Recurring
Level 2
Commercial
Dec. 31, 2011
Recurring
Level 2
Commercial
Sep. 30, 2012
Recurring
Level 2
U.S. Treasury and federal agency securities
Dec. 31, 2011
Recurring
Level 2
U.S. Treasury and federal agency securities
Sep. 30, 2012
Recurring
Level 2
U.S. Treasury
Dec. 31, 2011
Recurring
Level 2
U.S. Treasury
Sep. 30, 2012
Recurring
Level 2
Agency obligations
Dec. 31, 2011
Recurring
Level 2
Agency obligations
Sep. 30, 2012
Recurring
Level 2
State and municipal securities
Dec. 31, 2011
Recurring
Level 2
State and municipal securities
Sep. 30, 2012
Recurring
Level 2
Foreign government
Dec. 31, 2011
Recurring
Level 2
Foreign government
Sep. 30, 2012
Recurring
Level 2
Corporate
Dec. 31, 2011
Recurring
Level 2
Corporate
Sep. 30, 2012
Recurring
Level 2
Equity securities
Dec. 31, 2011
Recurring
Level 2
Equity securities
Sep. 30, 2012
Recurring
Level 2
Asset-backed securities
Dec. 31, 2011
Recurring
Level 2
Asset-backed securities
Sep. 30, 2012
Recurring
Level 2
Other debt securities
Dec. 31, 2011
Recurring
Level 2
Other debt securities
Sep. 30, 2012
Recurring
Level 2
Non-marketable equity securities
Dec. 31, 2011
Recurring
Level 2
Non-marketable equity securities
Sep. 30, 2012
Recurring
Level 3
Dec. 31, 2011
Recurring
Level 3
Sep. 30, 2012
Recurring
Level 3
Interest rate contracts
Dec. 31, 2011
Recurring
Level 3
Interest rate contracts
Sep. 30, 2012
Recurring
Level 3
Foreign exchange contracts
Dec. 31, 2011
Recurring
Level 3
Foreign exchange contracts
Sep. 30, 2012
Recurring
Level 3
Equity contracts
Dec. 31, 2011
Recurring
Level 3
Equity contracts
Sep. 30, 2012
Recurring
Level 3
Commodity contracts
Dec. 31, 2011
Recurring
Level 3
Commodity contracts
Sep. 30, 2012
Recurring
Level 3
Credit derivatives
Dec. 31, 2011
Recurring
Level 3
Credit derivatives
Sep. 30, 2012
Recurring
Level 3
Mortgage-backed securities
Dec. 31, 2011
Recurring
Level 3
Mortgage-backed securities
Sep. 30, 2012
Recurring
Level 3
U.S. government-sponsored agency guaranteed
Dec. 31, 2011
Recurring
Level 3
U.S. government-sponsored agency guaranteed
Sep. 30, 2012
Recurring
Level 3
Prime
Dec. 31, 2011
Recurring
Level 3
Prime
Sep. 30, 2012
Recurring
Level 3
Alt-A
Dec. 31, 2011
Recurring
Level 3
Alt-A
Sep. 30, 2012
Recurring
Level 3
Subprime
Dec. 31, 2011
Recurring
Level 3
Subprime
Sep. 30, 2012
Recurring
Level 3
Non-U.S. residential
Dec. 31, 2011
Recurring
Level 3
Non-U.S. residential
Sep. 30, 2012
Recurring
Level 3
Commercial
Dec. 31, 2011
Recurring
Level 3
Commercial
Sep. 30, 2012
Recurring
Level 3
U.S. Treasury and federal agency securities
Dec. 31, 2011
Recurring
Level 3
U.S. Treasury and federal agency securities
Sep. 30, 2012
Recurring
Level 3
U.S. Treasury
Sep. 30, 2012
Recurring
Level 3
Agency obligations
Dec. 31, 2011
Recurring
Level 3
Agency obligations
Sep. 30, 2012
Recurring
Level 3
State and municipal securities
Dec. 31, 2011
Recurring
Level 3
State and municipal securities
Sep. 30, 2012
Recurring
Level 3
Foreign government
Dec. 31, 2011
Recurring
Level 3
Foreign government
Sep. 30, 2012
Recurring
Level 3
Corporate
Dec. 31, 2011
Recurring
Level 3
Corporate
Sep. 30, 2012
Recurring
Level 3
Equity securities
Dec. 31, 2011
Recurring
Level 3
Equity securities
Sep. 30, 2012
Recurring
Level 3
Asset-backed securities
Dec. 31, 2011
Recurring
Level 3
Asset-backed securities
Sep. 30, 2012
Recurring
Level 3
Other debt securities
Dec. 31, 2011
Recurring
Level 3
Other debt securities
Sep. 30, 2012
Recurring
Level 3
Non-marketable equity securities
Dec. 31, 2011
Recurring
Level 3
Non-marketable equity securities
Sep. 30, 2012
Recurring
Gross inventory
Dec. 31, 2011
Recurring
Gross inventory
Sep. 30, 2012
Recurring
Gross inventory
Interest rate contracts
Dec. 31, 2011
Recurring
Gross inventory
Interest rate contracts
Sep. 30, 2012
Recurring
Gross inventory
Foreign exchange contracts
Dec. 31, 2011
Recurring
Gross inventory
Foreign exchange contracts
Sep. 30, 2012
Recurring
Gross inventory
Equity contracts
Dec. 31, 2011
Recurring
Gross inventory
Equity contracts
Sep. 30, 2012
Recurring
Gross inventory
Commodity contracts
Dec. 31, 2011
Recurring
Gross inventory
Commodity contracts
Sep. 30, 2012
Recurring
Gross inventory
Credit derivatives
Dec. 31, 2011
Recurring
Gross inventory
Credit derivatives
Sep. 30, 2012
Recurring
Gross inventory
Mortgage-backed securities
Dec. 31, 2011
Recurring
Gross inventory
Mortgage-backed securities
Sep. 30, 2012
Recurring
Gross inventory
U.S. government-sponsored agency guaranteed
Dec. 31, 2011
Recurring
Gross inventory
U.S. government-sponsored agency guaranteed
Sep. 30, 2012
Recurring
Gross inventory
Prime
Dec. 31, 2011
Recurring
Gross inventory
Prime
Sep. 30, 2012
Recurring
Gross inventory
Alt-A
Dec. 31, 2011
Recurring
Gross inventory
Alt-A
Sep. 30, 2012
Recurring
Gross inventory
Subprime
Dec. 31, 2011
Recurring
Gross inventory
Subprime
Sep. 30, 2012
Recurring
Gross inventory
Non-U.S. residential
Dec. 31, 2011
Recurring
Gross inventory
Non-U.S. residential
Sep. 30, 2012
Recurring
Gross inventory
Commercial
Dec. 31, 2011
Recurring
Gross inventory
Commercial
Sep. 30, 2012
Recurring
Gross inventory
U.S. Treasury and federal agency securities
Dec. 31, 2011
Recurring
Gross inventory
U.S. Treasury and federal agency securities
Sep. 30, 2012
Recurring
Gross inventory
U.S. Treasury
Dec. 31, 2011
Recurring
Gross inventory
U.S. Treasury
Sep. 30, 2012
Recurring
Gross inventory
Agency obligations
Dec. 31, 2011
Recurring
Gross inventory
Agency obligations
Sep. 30, 2012
Recurring
Gross inventory
State and municipal securities
Dec. 31, 2011
Recurring
Gross inventory
State and municipal securities
Sep. 30, 2012
Recurring
Gross inventory
Foreign government
Dec. 31, 2011
Recurring
Gross inventory
Foreign government
Sep. 30, 2012
Recurring
Gross inventory
Corporate
Dec. 31, 2011
Recurring
Gross inventory
Corporate
Sep. 30, 2012
Recurring
Gross inventory
Equity securities
Dec. 31, 2011
Recurring
Gross inventory
Equity securities
Sep. 30, 2012
Recurring
Gross inventory
Asset-backed securities
Dec. 31, 2011
Recurring
Gross inventory
Asset-backed securities
Sep. 30, 2012
Recurring
Gross inventory
Other debt securities
Dec. 31, 2011
Recurring
Gross inventory
Other debt securities
Sep. 30, 2012
Recurring
Gross inventory
Non-marketable equity securities
Dec. 31, 2011
Recurring
Gross inventory
Non-marketable equity securities
Sep. 30, 2012
Recurring
Netting
Dec. 31, 2011
Recurring
Netting
Sep. 30, 2012
Recurring
Fair value
Dec. 31, 2011
Recurring
Fair value
Sep. 30, 2012
Recurring
Fair value
Mortgage-backed securities
Dec. 31, 2011
Recurring
Fair value
Mortgage-backed securities
Sep. 30, 2012
Recurring
Fair value
U.S. government-sponsored agency guaranteed
Dec. 31, 2011
Recurring
Fair value
U.S. government-sponsored agency guaranteed
Sep. 30, 2012
Recurring
Fair value
Prime
Dec. 31, 2011
Recurring
Fair value
Prime
Sep. 30, 2012
Recurring
Fair value
Alt-A
Dec. 31, 2011
Recurring
Fair value
Alt-A
Sep. 30, 2012
Recurring
Fair value
Subprime
Dec. 31, 2011
Recurring
Fair value
Subprime
Sep. 30, 2012
Recurring
Fair value
Non-U.S. residential
Dec. 31, 2011
Recurring
Fair value
Non-U.S. residential
Sep. 30, 2012
Recurring
Fair value
Commercial
Dec. 31, 2011
Recurring
Fair value
Commercial
Sep. 30, 2012
Recurring
Fair value
U.S. Treasury and federal agency securities
Dec. 31, 2011
Recurring
Fair value
U.S. Treasury and federal agency securities
Sep. 30, 2012
Recurring
Fair value
U.S. Treasury
Dec. 31, 2011
Recurring
Fair value
U.S. Treasury
Sep. 30, 2012
Recurring
Fair value
Agency obligations
Dec. 31, 2011
Recurring
Fair value
Agency obligations
Sep. 30, 2012
Recurring
Fair value
State and municipal securities
Dec. 31, 2011
Recurring
Fair value
State and municipal securities
Sep. 30, 2012
Recurring
Fair value
Foreign government
Dec. 31, 2011
Recurring
Fair value
Foreign government
Sep. 30, 2012
Recurring
Fair value
Corporate
Dec. 31, 2011
Recurring
Fair value
Corporate
Sep. 30, 2012
Recurring
Fair value
Equity securities
Dec. 31, 2011
Recurring
Fair value
Equity securities
Sep. 30, 2012
Recurring
Fair value
Asset-backed securities
Dec. 31, 2011
Recurring
Fair value
Asset-backed securities
Sep. 30, 2012
Recurring
Fair value
Other debt securities
Dec. 31, 2011
Recurring
Fair value
Other debt securities
Sep. 30, 2012
Recurring
Fair value
Non-marketable equity securities
Dec. 31, 2011
Recurring
Fair value
Non-marketable equity securities
FAIR VALUE MEASUREMENT                                                                                                                                                                                                                                                                                                                                                                                                              
Weighted average FICO score of the underlying collateral for Alt-A mortgage securities recorded at fair value, low end of range 680                                                                                                                                                                                                                                                                                                                                                                                                            
Weighted average FICO score of the underlying collateral for Alt-A mortgage securities recorded at fair value, high end of range 720                                                                                                                                                                                                                                                                                                                                                                                                            
Residential mortgage-backed securities (RMBS) where collateral is composed of full documentation loans, above the high end of range (as a percent) 30.00%                                                                                                                                                                                                                                                                                                                                                                                                            
Assets and Liabilities Measured at Fair Value on a Recurring Basis                                                                                                                                                                                                                                                                                                                                                                                                              
Federal funds sold and securities borrowed or purchased under agreements to resell, selected portfolios of securities purchased under agreements to resell and securities borrowed $ 166,506,000,000 $ 142,862,000,000                                             $ 205,398,000,000 $ 188,034,000,000                                                                                         $ 4,677,000,000 $ 4,701,000,000                                                                                       $ 210,075,000,000 $ 192,735,000,000                                                                                         $ (43,569,000,000) $ (49,873,000,000) $ 166,506,000,000 $ 142,862,000,000                                                                    
Trading securities         121,873,000,000 97,748,000,000                     14,592,000,000 15,612,000,000 14,592,000,000 15,612,000,000 59,790,000,000 52,429,000,000 47,491,000,000 29,707,000,000 122,520,000,000 115,867,000,000                     34,079,000,000 29,751,000,000 31,418,000,000 26,674,000,000 304,000,000 118,000,000 493,000,000 444,000,000 187,000,000 524,000,000 401,000,000 276,000,000 1,276,000,000 1,715,000,000 5,785,000,000 3,784,000,000 2,755,000,000 2,615,000,000 3,030,000,000 1,169,000,000 5,226,000,000 5,112,000,000 29,394,000,000 26,601,000,000 32,556,000,000 33,786,000,000 2,835,000,000 3,279,000,000 1,051,000,000 1,270,000,000 11,594,000,000 12,284,000,000     13,655,000,000 15,792,000,000                     3,079,000,000 2,988,000,000 684,000,000 861,000,000 943,000,000 759,000,000 309,000,000 165,000,000 566,000,000 465,000,000 53,000,000 120,000,000 524,000,000 618,000,000   3,000,000     3,000,000 248,000,000 252,000,000 198,000,000 521,000,000 2,351,000,000 3,240,000,000 243,000,000 244,000,000 5,122,000,000 5,801,000,000 2,414,000,000 2,743,000,000     258,048,000,000 229,407,000,000                     37,158,000,000 32,739,000,000 32,102,000,000 27,535,000,000 1,247,000,000 877,000,000 802,000,000 609,000,000 753,000,000 989,000,000 454,000,000 396,000,000 1,800,000,000 2,333,000,000 20,377,000,000 19,399,000,000 17,347,000,000 18,227,000,000 3,030,000,000 1,172,000,000 5,474,000,000 5,364,000,000 89,382,000,000 79,551,000,000 34,907,000,000 37,026,000,000 50,569,000,000 33,230,000,000 6,173,000,000 7,071,000,000 14,008,000,000 15,027,000,000         258,048,000,000 229,407,000,000 37,158,000,000 32,739,000,000 32,102,000,000 27,535,000,000 1,247,000,000 877,000,000 802,000,000 609,000,000 753,000,000 989,000,000 454,000,000 396,000,000 1,800,000,000 2,333,000,000 20,377,000,000 19,399,000,000 17,347,000,000 18,227,000,000 3,030,000,000 1,172,000,000 5,474,000,000 5,364,000,000 89,382,000,000 79,551,000,000 34,907,000,000 37,026,000,000 50,569,000,000 33,230,000,000 6,173,000,000 7,071,000,000 14,008,000,000 15,027,000,000    
Total Gross Trading account derivatives, Assets         3,758,000,000 3,265,000,000 67,000,000 12,000,000 3,100,000,000 2,240,000,000 646,000,000 958,000,000                         1,057,507,000,000 958,448,000,000 906,612,000,000 755,473,000,000 71,082,000,000 93,536,000,000 15,290,000,000 16,376,000,000 9,893,000,000 11,940,000,000 54,630,000,000 81,123,000,000                                                                     9,339,000,000 14,513,000,000 2,107,000,000 1,947,000,000 731,000,000 781,000,000 1,556,000,000 1,619,000,000 890,000,000 865,000,000 4,055,000,000 9,301,000,000                                                                   1,070,604,000,000 976,226,000,000 908,719,000,000 757,487,000,000 71,825,000,000 94,317,000,000 19,946,000,000 20,235,000,000 11,429,000,000 13,763,000,000 58,685,000,000 90,424,000,000                                                                                                                                                
Gross cash collateral paid                                                                                                                                                                                                                                       61,151,000,000 57,815,000,000                                                                                                                                                                    
Less: Netting agreements and market value adjustments to assets                                                                                                                                                                                                                                                                                                                                   (1,074,602,000,000) (971,714,000,000)                                                                        
Total trading account derivatives, assets         3,758,000,000 3,265,000,000                                     1,057,507,000,000 958,448,000,000                                                                                         9,339,000,000 14,513,000,000                                                                                       1,131,755,000,000 1,034,041,000,000                                                                                         (1,074,602,000,000) (971,714,000,000) 57,153,000,000 62,327,000,000                                                                    
Investments 276,489,000,000 274,040,000,000     52,726,000,000 51,879,000,000             50,000,000 59,000,000 50,000,000 59,000,000 13,454,000,000 11,642,000,000 13,454,000,000 11,642,000,000 36,823,000,000 33,544,000,000 2,399,000,000 6,634,000,000 210,326,000,000 205,364,000,000                     49,401,000,000 50,279,000,000 42,963,000,000 45,043,000,000 124,000,000 105,000,000 113,000,000 1,000,000     5,727,000,000 4,658,000,000 474,000,000 472,000,000 70,867,000,000 73,421,000,000 43,893,000,000 38,587,000,000 26,974,000,000 34,834,000,000 17,512,000,000 13,732,000,000 53,860,000,000 50,523,000,000 9,430,000,000 9,268,000,000 153,000,000 98,000,000 8,659,000,000 6,962,000,000   563,000,000 444,000,000 518,000,000 13,437,000,000 16,797,000,000                     2,793,000,000 687,000,000 1,204,000,000 679,000,000 2,000,000 8,000,000 36,000,000       1,551,000,000       87,000,000 75,000,000 75,000,000 12,000,000 75,000,000 591,000,000 667,000,000 381,000,000 447,000,000 337,000,000 989,000,000 1,058,000,000 1,453,000,000 3,352,000,000 4,041,000,000 54,000,000 120,000,000 4,784,000,000 8,318,000,000 276,489,000,000 274,040,000,000                     52,244,000,000 51,025,000,000 44,217,000,000 45,781,000,000 126,000,000 113,000,000 149,000,000 1,000,000     7,278,000,000 4,658,000,000 474,000,000 472,000,000 84,408,000,000 85,138,000,000 57,422,000,000 50,229,000,000 26,986,000,000 34,909,000,000 18,103,000,000 14,399,000,000 91,064,000,000 84,514,000,000 9,767,000,000 10,257,000,000 3,610,000,000 8,185,000,000 12,011,000,000 11,003,000,000 54,000,000 683,000,000 5,228,000,000 8,836,000,000     276,489,000,000 274,040,000,000 52,244,000,000 51,025,000,000 44,217,000,000 45,781,000,000 126,000,000 113,000,000 149,000,000 1,000,000     7,278,000,000 4,658,000,000 474,000,000 472,000,000 84,408,000,000 85,138,000,000 57,422,000,000 50,229,000,000 26,986,000,000 34,909,000,000 18,103,000,000 14,399,000,000 91,064,000,000 84,514,000,000 9,767,000,000 10,257,000,000 3,610,000,000 8,185,000,000 12,011,000,000 11,003,000,000 54,000,000 683,000,000 5,228,000,000 8,836,000,000
Loans 5,359,000,000 5,265,000,000                                             295,000,000 583,000,000                                                                                         5,064,000,000 4,682,000,000                                                                                       5,359,000,000 5,265,000,000                                                                                             5,359,000,000 5,265,000,000                                                                    
Mortgage servicing rights (MSRs)                                                                                                                                             1,920,000,000 2,569,000,000                                                                                       1,920,000,000 2,569,000,000                                                                                             1,920,000,000 2,569,000,000                                                                    
Nontrading derivatives and other financial assets measured on a recurring basis, gross                                                 9,775,000,000 14,270,000,000                                                                                         2,665,000,000 2,245,000,000                                                                                       12,440,000,000 16,515,000,000                                                                                                                                                                    
Gross cash collateral paid                                                                                                                                                                                                                                       389,000,000 307,000,000                                                                                                                                                                    
Netting agreements and market value adjustments                                                                                                                                                                                                                                                                                                                                   (4,403,000,000) (3,462,000,000)                                                                        
Nontrading derivatives and other financial assets measured on a recurring basis 8,426,000,000 13,360,000,000                                             9,775,000,000 14,270,000,000                                                                                         2,665,000,000 2,245,000,000                                                                                       12,829,000,000 16,822,000,000                                                                                         (4,403,000,000) (3,462,000,000) 8,426,000,000 13,360,000,000                                                                    
Total assets         178,357,000,000 152,892,000,000                                     1,605,821,000,000 1,482,566,000,000                                                                                         50,757,000,000 61,299,000,000                                                                                       1,896,475,000,000 1,754,879,000,000                                                                                         (1,122,574,000,000) (1,025,049,000,000) 773,901,000,000 729,830,000,000                                                                    
Total as a percentage of gross assets         9.70% 9.00%                                     87.50% 87.40%                                                                                         2.80% 3.60%                                                                                       100.00% 100.00%                                                                                                                                                                    
Interest-bearing deposits                                                 1,103,000,000 895,000,000                                                                                         761,000,000 431,000,000                                                                                       1,864,000,000 1,326,000,000                                                                                             1,864,000,000 1,326,000,000                                                                    
Federal funds purchased and securities loaned or sold under agreements to repurchase 123,459,000,000 97,712,000,000                                             166,187,000,000 146,524,000,000                                                                                         841,000,000 1,061,000,000                                                                                       167,028,000,000 147,585,000,000                                                                                         (43,569,000,000) (49,873,000,000) 123,459,000,000 97,712,000,000                                                                    
Securities sold, not yet purchased         64,654,000,000 58,456,000,000                                     9,492,000,000 10,941,000,000                                                                                         125,000,000 412,000,000                                                                                       74,271,000,000 69,809,000,000                                                                                             74,271,000,000 69,809,000,000                                                                    
Total Gross trading account derivatives, Liabilities         4,320,000,000 3,732,000,000 37,000,000 8,000,000 3,581,000,000 2,822,000,000 731,000,000 873,000,000                         1,061,053,000,000 950,926,000,000 892,809,000,000 738,833,000,000 78,315,000,000 96,020,000,000 27,922,000,000 26,961,000,000 10,113,000,000 11,959,000,000 51,894,000,000 77,153,000,000                                                                     13,055,000,000 15,292,000,000 2,229,000,000 1,221,000,000 1,321,000,000 1,343,000,000 3,185,000,000 3,356,000,000 1,804,000,000 1,799,000,000 4,516,000,000 7,573,000,000                                                                   1,078,428,000,000 969,950,000,000 895,038,000,000 740,091,000,000 79,644,000,000 97,363,000,000 34,688,000,000 33,139,000,000 12,648,000,000 14,631,000,000 56,410,000,000 84,726,000,000                                                                                                                                                
Gross cash collateral received                                                                                                                                                                                                                                       47,584,000,000 52,811,000,000                                                                                                                                                                    
Netting agreements and market value adjustments to liabilities                                                                                                                                                                                                                                                                                                                                   (1,070,293,000,000) (966,488,000,000)                                                                        
Total trading account derivatives, liabilities         4,320,000,000 3,732,000,000                                     1,061,053,000,000 950,926,000,000                                                                                         13,055,000,000 15,292,000,000                                                                                       1,126,012,000,000 1,022,761,000,000                                                                                         (1,070,293,000,000) (966,488,000,000) 55,719,000,000 56,273,000,000                                                                    
Short-term borrowings 761,000,000 1,354,000,000                                             662,000,000 855,000,000                                                                                         99,000,000 499,000,000                                                                                       761,000,000 1,354,000,000                                                                                             761,000,000 1,354,000,000                                                                    
Long-term debt, at fair value 27,336,000,000 24,172,000,000                                             20,870,000,000 17,268,000,000                                                                                         6,466,000,000 6,904,000,000                                                                                       27,336,000,000 24,172,000,000                                                                                             27,336,000,000 24,172,000,000                                                                    
Nontrading derivatives and other financial liabilities measured on a recurring basis, gross 3,407,000,000 3,742,000,000                                             2,797,000,000 3,559,000,000                                                                                         3,000,000 3,000,000                                                                                       2,800,000,000 3,562,000,000                                                                                                                                                                    
Gross cash collateral received                                                                                                                                                                                                                                       5,010,000,000 3,642,000,000                                                                                                                                                                    
Netting agreements and market value adjustments                                                                                                                                                                                                                                                                                                                                   (4,403,000,000) (3,462,000,000)                                                                        
Nontrading derivatives and other financial liabilities measured on a recurring basis                                                 2,797,000,000 3,559,000,000                                                                                         3,000,000 3,000,000                                                                                       7,810,000,000 7,204,000,000                                                                                         (4,403,000,000) (3,462,000,000) 3,407,000,000 3,742,000,000                                                                    
Total liabilities         68,974,000,000 62,188,000,000                                     1,262,164,000,000 1,130,968,000,000                                                                                         21,350,000,000 24,602,000,000                                                                                       1,405,082,000,000 1,274,211,000,000                                                                                         (1,118,265,000,000) (1,019,823,000,000) 286,817,000,000 254,388,000,000                                                                    
Total as a percentage of gross liabilities         5.10% 5.10%                                     93.30% 92.90%                                                                                         1.60% 2.00%                                                                                       100.00% 100.00%                                                                                                                                                                    
Transfers of assets from Level 2 to Level 1     500,000,000 1,000,000,000                                                                                                                                                                                                                                                                                                                                                                                                      
Transfers of assets from Level 1 to Level 2     300,000,000 1,300,000,000                                                                                                                                                                                                                                                                                                                                                                                                      
Transfers of liabilities from Level 1 to Level 2     5,000,000 24,000,000                                                                                                                                                                                                                                                                                                                                                                                                      
Transfers of liabilities from Level 2 to Level 1     $ 99,000,000 $ 134,000,000