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FAIR VALUE MEASUREMENT - Level 3 Roll Forward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Threshold tenor of repo curves to classify certain reverse repos to Level 3 5 years  
Trading account assets and liabilities    
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset (liability), net $ (2,661) $ (991)
Net realized/unrealized gains (losses) included in earnings (787) (1,149)
Transfers into Level 3 (38) (749)
Transfers out of Level 3 141 461
Purchases 914 710
Sales (577) (503)
Settlements 779 (440)
Balance at end of period, asset (liability), net (2,229) (2,661)
Unrealized gains (losses) still held 767 (1,175)
Trading account assets and liabilities | Interest rate contracts    
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset (liability), net (211) 839
Net realized/unrealized gains (losses) included in earnings (492) (818)
Transfers into Level 3 (124) 24
Transfers out of Level 3 15 (98)
Purchases 24 113
Sales 141 (162)
Settlements 152 (109)
Balance at end of period, asset (liability), net (495) (211)
Unrealized gains (losses) still held 553 (414)
Trading account assets and liabilities | Foreign exchange contracts    
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset (liability), net 778 695
Net realized/unrealized gains (losses) included in earnings (245) 92
Transfers into Level 3 (11) 47
Transfers out of Level 3 27 (39)
Purchases 393 59
Sales (381) (59)
Settlements 59 (17)
Balance at end of period, asset (liability), net 620 778
Unrealized gains (losses) still held (12) 56
Trading account assets and liabilities | Equity contracts    
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset (liability), net (863) (858)
Net realized/unrealized gains (losses) included in earnings 148 482
Transfers into Level 3 (126) (916)
Transfers out of Level 3 66 766
Purchases 496 435
Sales (334) (279)
Settlements (187) (493)
Balance at end of period, asset (liability), net (800) (863)
Unrealized gains (losses) still held 41 (274)
Trading account assets and liabilities | Commodity contracts    
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset (liability), net (1,622) (1,393)
Net realized/unrealized gains (losses) included in earnings (753) (338)
Transfers into Level 3 214 92
Transfers out of Level 3 (28) (12)
Purchases 0 0
Sales 0 0
Settlements 328 29
Balance at end of period, asset (liability), net (1,861) (1,622)
Unrealized gains (losses) still held (257) (174)
Trading account assets and liabilities | Credit derivatives    
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset (liability), net (743) (274)
Net realized/unrealized gains (losses) included in earnings 555 (567)
Transfers into Level 3 9 4
Transfers out of Level 3 61 (156)
Purchases 1 103
Sales (3) (3)
Settlements 427 150
Balance at end of period, asset (liability), net 307 (743)
Unrealized gains (losses) still held 442 (369)
Interest-bearing deposits    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 486 890
Net realized/unrealized gains (losses) included in earnings, liabilities 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 10 357
Transfers into Level 3, liabilities 1 5
Transfers out of Level 3, liabilities (1) (12)
Purchases, liability 0 0
Issuance, liability 36 127
Sales, liability 0 0
Settlements, liability (78) (167)
Balance at end of period, liability 434 486
Unrealized gains (losses) still held, liabilities (154) (69)
Federal funds purchased and securities loaned or sold under agreements to repurchase    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 1,043 902
Net realized/unrealized gains (losses) included in earnings, liabilities (23) (6)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 0 54
Transfers out of Level 3, liabilities 0 0
Purchases, liability 0 78
Issuance, liability 0 0
Sales, liability 302 220
Settlements, liability (121) (217)
Balance at end of period, liability 1,247 1,043
Unrealized gains (losses) still held, liabilities 134 (34)
Trading account liabilities | Securities sold, not yet purchased    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 424 590
Net realized/unrealized gains (losses) included in earnings, liabilities 88 (81)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 311 79
Transfers out of Level 3, liabilities (231) (111)
Purchases, liability 0 0
Issuance, liability 0 0
Sales, liability 385 534
Settlements, liability (602) (749)
Balance at end of period, liability 199 424
Unrealized gains (losses) still held, liabilities (25) (58)
Short-term borrowings    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 344 29
Net realized/unrealized gains (losses) included in earnings, liabilities 11 (31)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 23 323
Transfers out of Level 3, liabilities (30) (12)
Purchases, liability 0 0
Issuance, liability 1 49
Sales, liability 0 0
Settlements, liability (318) (76)
Balance at end of period, liability 9 344
Unrealized gains (losses) still held, liabilities (4) (8)
Long-term debt    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 7,290 7,621
Net realized/unrealized gains (losses) included in earnings, liabilities 539 109
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 49
Transfers into Level 3, liabilities 2,311 2,701
Transfers out of Level 3, liabilities (3,958) (4,206)
Purchases, liability 0 0
Issuance, liability 3,407 3,893
Sales, liability 0 0
Settlements, liability (1,560) (2,561)
Balance at end of period, liability 6,951 7,290
Unrealized gains (losses) still held, liabilities (347) (446)
Other financial liabilities    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 7 10
Net realized/unrealized gains (losses) included in earnings, liabilities 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities (11) (5)
Transfers into Level 3, liabilities 10 7
Transfers out of Level 3, liabilities (4) (3)
Purchases, liability (5) (2)
Issuance, liability 5 1
Sales, liability 2 (3)
Settlements, liability (12) (8)
Balance at end of period, liability 14 7
Unrealized gains (losses) still held, liabilities (4) (4)
Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 3,398 3,566
Net realized/unrealized gains (losses) included in principal transactions (147) (61)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 279 84
Transfers out of Level 3, assets (2,856) (8)
Purchases, assets 784 75
Issuance, assets 0 0
Sales, assets 0 0
Settlements, assets (121) (258)
Balance at end of period, asset 1,337 3,398
Unrealized gains (losses) still held, assets (5) 133
Trading non-derivative assets    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 15,357 15,260
Net realized/unrealized gains (losses) included in principal transactions 1,265 1,653
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 3,777 5,165
Transfers out of Level 3, assets (6,281) (5,535)
Purchases, assets 12,631 17,516
Issuance, assets 51 26
Sales, assets (14,125) (18,292)
Settlements, assets (257) (436)
Balance at end of period, asset 12,418 15,357
Unrealized gains (losses) still held, assets 103 374
Trading non-derivative assets | U.S. government-sponsored agency guaranteed    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 1,085 1,094
Net realized/unrealized gains (losses) included in principal transactions 24 117
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 872 854
Transfers out of Level 3, assets (1,277) (966)
Purchases, assets 796 714
Issuance, assets 0 26
Sales, assets (756) (695)
Settlements, assets 0 (59)
Balance at end of period, asset 744 1,085
Unrealized gains (losses) still held, assets (4) 8
Trading non-derivative assets | Mortgage-backed securities - Residential    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 2,680 2,854
Net realized/unrealized gains (losses) included in principal transactions 254 457
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 370 442
Transfers out of Level 3, assets (480) (514)
Purchases, assets 1,574 2,582
Issuance, assets 0 0
Sales, assets (3,072) (3,141)
Settlements, assets 0 0
Balance at end of period, asset 1,326 2,680
Unrealized gains (losses) still held, assets (101) 132
Trading non-derivative assets | Mortgage-backed securities - Commercial    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 440 256
Net realized/unrealized gains (losses) included in principal transactions 18 17
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 252 187
Transfers out of Level 3, assets (157) (376)
Purchases, assets 697 758
Issuance, assets 0 0
Sales, assets (733) (402)
Settlements, assets 0 0
Balance at end of period, asset 517 440
Unrealized gains (losses) still held, assets (7) (4)
Trading non-derivative assets | Mortgage-backed securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 4,205 4,204
Net realized/unrealized gains (losses) included in principal transactions 296 591
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 1,494 1,483
Transfers out of Level 3, assets (1,914) (1,856)
Purchases, assets 3,067 4,054
Issuance, assets 0 26
Sales, assets (4,561) (4,238)
Settlements, assets 0 (59)
Balance at end of period, asset 2,587 4,205
Unrealized gains (losses) still held, assets (112) 136
Trading non-derivative assets | U.S. Treasury and federal agency securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 0 0
Net realized/unrealized gains (losses) included in principal transactions 0 3
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 2 0
Transfers out of Level 3, assets (1) 0
Purchases, assets 1 7
Issuance, assets 0 0
Sales, assets (1) (10)
Settlements, assets 0 0
Balance at end of period, asset 1 0
Unrealized gains (losses) still held, assets 0 0
Trading non-derivative assets | State and municipal securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 241 222
Net realized/unrealized gains (losses) included in principal transactions 0 10
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 67 150
Transfers out of Level 3, assets (35) (105)
Purchases, assets 183 34
Issuance, assets 0 0
Sales, assets (105) (70)
Settlements, assets 0 0
Balance at end of period, asset 351 241
Unrealized gains (losses) still held, assets (7) 1
Trading non-derivative assets | Foreign government    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 206 416
Net realized/unrealized gains (losses) included in principal transactions (10) (56)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 53 130
Transfers out of Level 3, assets (100) (253)
Purchases, assets 271 676
Issuance, assets 0 0
Sales, assets (169) (707)
Settlements, assets (54) 0
Balance at end of period, asset 197 206
Unrealized gains (losses) still held, assets 6 5
Trading non-derivative assets | Corporate    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 820 1,835
Net realized/unrealized gains (losses) included in principal transactions 111 (127)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 186 465
Transfers out of Level 3, assets (288) (502)
Purchases, assets 802 1,988
Issuance, assets 0 0
Sales, assets (1,244) (2,839)
Settlements, assets (11) 0
Balance at end of period, asset 376 820
Unrealized gains (losses) still held, assets (29) (139)
Trading non-derivative assets | Equity securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 2,219 1,057
Net realized/unrealized gains (losses) included in principal transactions 547 87
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 344 142
Transfers out of Level 3, assets (371) (209)
Purchases, assets 1,377 1,437
Issuance, assets 0 0
Sales, assets (432) (295)
Settlements, assets 0 0
Balance at end of period, asset 3,684 2,219
Unrealized gains (losses) still held, assets 464 337
Trading non-derivative assets | Asset-backed securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 3,294 4,342
Net realized/unrealized gains (losses) included in principal transactions 141 876
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 663 158
Transfers out of Level 3, assets (282) (332)
Purchases, assets 4,426 3,893
Issuance, assets 0 0
Sales, assets (5,503) (5,643)
Settlements, assets 0 0
Balance at end of period, asset 2,739 3,294
Unrealized gains (losses) still held, assets (174) 3
Trading non-derivative assets | Other debt securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 4,372 3,184
Net realized/unrealized gains (losses) included in principal transactions 180 269
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 968 2,637
Transfers out of Level 3, assets (3,290) (2,278)
Purchases, assets 2,504 5,427
Issuance, assets 51 0
Sales, assets (2,110) (4,490)
Settlements, assets (192) (377)
Balance at end of period, asset 2,483 4,372
Unrealized gains (losses) still held, assets (45) 31
Investments    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 6,273 7,902
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (46) 344
Transfers into Level 3 1,156 1,304
Transfers out of Level 3, assets (1,230) (1,110)
Purchases, assets 1,890 3,183
Issuance, assets 0 0
Sales, assets (2,126) (2,838)
Settlements, assets (858) (2,512)
Balance at end of period, asset 5,059 6,273
Unrealized gains (losses) still held, assets (78) 5
Investments | U.S. government-sponsored agency guaranteed    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 38 187
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 29 52
Transfers into Level 3 171 60
Transfers out of Level 3, assets (118) (203)
Purchases, assets 62 17
Issuance, assets 0 0
Sales, assets (43) (73)
Settlements, assets 0 (2)
Balance at end of period, asset 139 38
Unrealized gains (losses) still held, assets (2) (8)
Investments | Mortgage-backed securities - Residential    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 8 102
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (1) 33
Transfers into Level 3 4 31
Transfers out of Level 3, assets 0 (2)
Purchases, assets 11 17
Issuance, assets 0 0
Sales, assets (18) (173)
Settlements, assets 0 0
Balance at end of period, asset 4 8
Unrealized gains (losses) still held, assets 0 0
Investments | Mortgage-backed securities - Commercial    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 1 0
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 (6)
Transfers into Level 3 4 4
Transfers out of Level 3, assets (3) (7)
Purchases, assets 0 10
Issuance, assets 0 0
Sales, assets 0 0
Settlements, assets 0 0
Balance at end of period, asset 2 1
Unrealized gains (losses) still held, assets 0 0
Investments | Mortgage-backed securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 47 289
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 28 79
Transfers into Level 3 179 95
Transfers out of Level 3, assets (121) (212)
Purchases, assets 73 44
Issuance, assets 0 0
Sales, assets (61) (246)
Settlements, assets 0 (2)
Balance at end of period, asset 145 47
Unrealized gains (losses) still held, assets (2) (8)
Investments | U.S. Treasury and federal agency securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 6 8
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 0 0
Transfers out of Level 3, assets 0 0
Purchases, assets 6 0
Issuance, assets 0 0
Sales, assets (8) (2)
Settlements, assets 0 0
Balance at end of period, asset 4 6
Unrealized gains (losses) still held, assets 0 0
Investments | State and municipal securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 2,180 1,643
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (23) (64)
Transfers into Level 3 834 811
Transfers out of Level 3, assets (721) (584)
Purchases, assets 842 923
Issuance, assets 0 0
Sales, assets (671) (549)
Settlements, assets (249) 0
Balance at end of period, asset 2,192 2,180
Unrealized gains (losses) still held, assets 9 49
Investments | Foreign government    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 678 344
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 45 (27)
Transfers into Level 3 (5) 286
Transfers out of Level 3, assets (270) (105)
Purchases, assets 601 851
Issuance, assets 0 0
Sales, assets (519) (490)
Settlements, assets (270) (181)
Balance at end of period, asset 260 678
Unrealized gains (losses) still held, assets (1) (17)
Investments | Corporate    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 672 285
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (7) (6)
Transfers into Level 3 15 26
Transfers out of Level 3, assets (52) (143)
Purchases, assets 144 728
Issuance, assets 0 0
Sales, assets (134) (218)
Settlements, assets (35) 0
Balance at end of period, asset 603 672
Unrealized gains (losses) still held, assets (4) (4)
Investments | Equity securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 681 815
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (22) 111
Transfers into Level 3 12 19
Transfers out of Level 3, assets (14) (19)
Purchases, assets 7 10
Issuance, assets 0 0
Sales, assets (540) (255)
Settlements, assets 0 0
Balance at end of period, asset 124 681
Unrealized gains (losses) still held, assets (120) (78)
Investments | Asset-backed securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 549 1,960
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (17) 41
Transfers into Level 3 45 0
Transfers out of Level 3, assets (58) (47)
Purchases, assets 202 95
Issuance, assets 0 0
Sales, assets (125) (195)
Settlements, assets 0 (1,305)
Balance at end of period, asset 596 549
Unrealized gains (losses) still held, assets 14 (18)
Investments | Other debt securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 0 50
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 (1)
Transfers into Level 3 0 0
Transfers out of Level 3, assets 0 0
Purchases, assets 10 116
Issuance, assets 0 0
Sales, assets (10) (115)
Settlements, assets 0 (50)
Balance at end of period, asset 0 0
Unrealized gains (losses) still held, assets 0 0
Investments | Non-marketable equity securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 1,460 2,508
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (50) 211
Transfers into Level 3 76 67
Transfers out of Level 3, assets 6 0
Purchases, assets 5 416
Issuance, assets 0 0
Sales, assets (58) (768)
Settlements, assets (304) (974)
Balance at end of period, asset 1,135 1,460
Unrealized gains (losses) still held, assets 26 81
Loans    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 3,108 4,143
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (303) (233)
Transfers into Level 3 689 92
Transfers out of Level 3, assets (805) 6
Purchases, assets 1,190 951
Issuance, assets 461 197
Sales, assets (807) (895)
Settlements, assets (1,367) (1,153)
Balance at end of period, asset 2,166 3,108
Unrealized gains (losses) still held, assets 24 37
Mortgage servicing rights    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 1,845 2,718
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 110 (390)
Transfers into Level 3 0 0
Transfers out of Level 3, assets 0 0
Purchases, assets 0 0
Issuance, assets 214 217
Sales, assets (38) (317)
Settlements, assets (350) (383)
Balance at end of period, asset 1,781 1,845
Unrealized gains (losses) still held, assets (390) (390)
Other financial assets measured on a recurring basis    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 78 181
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 100 100
Transfers into Level 3 201 (83)
Transfers out of Level 3, assets (66) 0
Purchases, assets 6 3
Issuance, assets 208 178
Sales, assets (85) (18)
Settlements, assets (262) (283)
Balance at end of period, asset 180 78
Unrealized gains (losses) still held, assets $ 582 $ 14