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FAIR VALUE MEASUREMENT - Level 3 Roll Forward (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
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
Equity securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Transfers out of Level 3 $ (4,000)  
Non-marketable equity securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Transfers out of Level 3 (3,200)  
Hedging derivatives    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Transfers out of Level 3 (500)  
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 (2,229) $ (2,661)
Net realized/unrealized gains (losses) included in earnings (2,833) (787)
Transfers into Level 3 22 (38)
Transfers out of Level 3 (1,185) 141
Purchases 849 914
Issuances 20  
Sales (832) (577)
Settlements 1,435 779
Balance at end of period, asset (liability), net (4,753) (2,229)
Unrealized gains (losses) still held (2,002) 767
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 (495) (211)
Net realized/unrealized gains (losses) included in earnings (146) (492)
Transfers into Level 3 301 (124)
Transfers out of Level 3 (239) 15
Purchases 163 24
Issuances (18)  
Sales (142) 141
Settlements (87) 152
Balance at end of period, asset (liability), net (663) (495)
Unrealized gains (losses) still held 26 553
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 620 778
Net realized/unrealized gains (losses) included in earnings (276) (245)
Transfers into Level 3 75 (11)
Transfers out of Level 3 (106) 27
Purchases 200 393
Issuances 0  
Sales (181) (381)
Settlements 81 59
Balance at end of period, asset (liability), net 413 620
Unrealized gains (losses) still held 23 (12)
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 (800) (863)
Net realized/unrealized gains (losses) included in earnings (89) 148
Transfers into Level 3 63 (126)
Transfers out of Level 3 (772) 66
Purchases 92 496
Issuances 38  
Sales (128) (334)
Settlements 39 (187)
Balance at end of period, asset (liability), net (1,557) (800)
Unrealized gains (losses) still held (33) 41
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 (1,861) (1,622)
Net realized/unrealized gains (losses) included in earnings (352) (753)
Transfers into Level 3 (425) 214
Transfers out of Level 3 (39) (28)
Purchases 357 0
Issuances 0  
Sales (347) 0
Settlements 722 328
Balance at end of period, asset (liability), net (1,945) (1,861)
Unrealized gains (losses) still held (164) (257)
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 307 (743)
Net realized/unrealized gains (losses) included in earnings (1,970) 555
Transfers into Level 3 8 9
Transfers out of Level 3 (29) 61
Purchases 37 1
Issuances 0  
Sales (34) (3)
Settlements 680 427
Balance at end of period, asset (liability), net (1,001) 307
Unrealized gains (losses) still held (1,854) 442
Interest-bearing deposits    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 434 486
Net realized/unrealized gains (losses) included in earnings, liabilities 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 43 10
Transfers into Level 3, liabilities 322 1
Transfers out of Level 3, liabilities (309) (1)
Purchases, liability 0 0
Issuance, liability 5 36
Sales, liability 0 0
Settlements, liability (116) (78)
Balance at end of period, liability 293 434
Unrealized gains (losses) still held, liabilities 46 (154)
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 1,247 1,043
Net realized/unrealized gains (losses) included in earnings, liabilities (6) (23)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 0 0
Transfers out of Level 3, liabilities (150) 0
Purchases, liability 0 0
Issuance, liability 0 0
Sales, liability 27 302
Settlements, liability (281) (121)
Balance at end of period, liability 849 1,247
Unrealized gains (losses) still held, liabilities (12) 134
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 199 424
Net realized/unrealized gains (losses) included in earnings, liabilities 17 88
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 1,185 311
Transfers out of Level 3, liabilities (109) (231)
Purchases, liability (70) 0
Issuance, liability (41) 0
Sales, liability 367 385
Settlements, liability (337) (602)
Balance at end of period, liability 1,177 199
Unrealized gains (losses) still held, liabilities (43) (25)
Trading account liabilities | Other trading liabilities    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 0 0
Net realized/unrealized gains (losses) included in earnings, liabilities 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 1 0
Transfers out of Level 3, liabilities 0 0
Purchases, liability 0 0
Issuance, liability 0 0
Sales, liability 0 0
Settlements, liability 0 0
Balance at end of period, liability 1 0
Unrealized gains (losses) still held, liabilities 0 0
Short-term borrowings    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 9 344
Net realized/unrealized gains (losses) included in earnings, liabilities (16) 11
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 19 23
Transfers out of Level 3, liabilities (37) (30)
Purchases, liability 0 0
Issuance, liability 87 1
Sales, liability 0 0
Settlements, liability (52) (318)
Balance at end of period, liability 42 9
Unrealized gains (losses) still held, liabilities 0 (4)
Long-term debt    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Transfers out of Level 3   (4,000)
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 7,543 7,290
Net realized/unrealized gains (losses) included in earnings, liabilities (282) 539
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities 0 0
Transfers into Level 3, liabilities 3,792 2,903
Transfers out of Level 3, liabilities (4,350) (3,958)
Purchases, liability 0 0
Issuance, liability 4,845 3,407
Sales, liability (3) 0
Settlements, liability (2,365) (1,560)
Balance at end of period, liability 9,744 7,543
Unrealized gains (losses) still held, liabilities (419) (347)
Other financial liabilities    
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, liability 14 7
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) (11)
Transfers into Level 3, liabilities 2 10
Transfers out of Level 3, liabilities (12) (4)
Purchases, liability (8) (5)
Issuance, liability 12 5
Sales, liability 0 2
Settlements, liability (11) (12)
Balance at end of period, liability 8 14
Unrealized gains (losses) still held, liabilities (13) (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 1,337 3,398
Net realized/unrealized gains (losses) included in principal transactions (20) (147)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 0 279
Transfers out of Level 3 (28) (2,856)
Purchases, assets 758 784
Issuance, assets 0 0
Sales, assets 0 0
Settlements, assets (551) (121)
Balance at end of period, asset 1,496 1,337
Unrealized gains (losses) still held, assets (16) (5)
Trading non-derivative assets    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 12,418 15,357
Net realized/unrealized gains (losses) included in principal transactions (79) 1,265
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 3,835 3,777
Transfers out of Level 3 (9,045) (6,281)
Purchases, assets 9,376 12,631
Issuance, assets 8 51
Sales, assets (10,235) (14,125)
Settlements, assets (27) (257)
Balance at end of period, asset 6,251 12,418
Unrealized gains (losses) still held, assets (647) 103
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 744 1,085
Net realized/unrealized gains (losses) included in principal transactions 6 24
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 510 872
Transfers out of Level 3 (1,087) (1,277)
Purchases, assets 941 796
Issuance, assets 0 0
Sales, assets (961) (756)
Settlements, assets 23 0
Balance at end of period, asset 176 744
Unrealized gains (losses) still held, assets (7) (4)
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 1,326 2,680
Net realized/unrealized gains (losses) included in principal transactions 104 254
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 189 370
Transfers out of Level 3 (162) (480)
Purchases, assets 324 1,574
Issuance, assets 0 0
Sales, assets (1,376) (3,072)
Settlements, assets (6) 0
Balance at end of period, asset 399 1,326
Unrealized gains (losses) still held, assets 26 (101)
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 517 440
Net realized/unrealized gains (losses) included in principal transactions (1) 18
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 193 252
Transfers out of Level 3 (234) (157)
Purchases, assets 759 697
Issuance, assets 0 0
Sales, assets (1,028) (733)
Settlements, assets 0 0
Balance at end of period, asset 206 517
Unrealized gains (losses) still held, assets (27) (7)
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 2,587 4,205
Net realized/unrealized gains (losses) included in principal transactions 109 296
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 892 1,494
Transfers out of Level 3 (1,483) (1,914)
Purchases, assets 2,024 3,067
Issuance, assets 0 0
Sales, assets (3,365) (4,561)
Settlements, assets 17 0
Balance at end of period, asset 781 2,587
Unrealized gains (losses) still held, assets (8) (112)
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 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 0
Transfers into Level 3 2 2
Transfers out of Level 3 0 (1)
Purchases, assets 0 1
Issuance, assets 0 0
Sales, assets (2) (1)
Settlements, assets 0 0
Balance at end of period, asset 1 1
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 351 241
Net realized/unrealized gains (losses) included in principal transactions 23 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 195 67
Transfers out of Level 3 (256) (35)
Purchases, assets 322 183
Issuance, assets 0 0
Sales, assets (339) (105)
Settlements, assets 0 0
Balance at end of period, asset 296 351
Unrealized gains (losses) still held, assets (88) (7)
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 197 206
Net realized/unrealized gains (losses) included in principal transactions (9) (10)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 21 53
Transfers out of Level 3 (49) (100)
Purchases, assets 115 271
Issuance, assets 0 0
Sales, assets (235) (169)
Settlements, assets 0 (54)
Balance at end of period, asset 40 197
Unrealized gains (losses) still held, assets (16) 6
Trading non-derivative assets | Corporate    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 376 820
Net realized/unrealized gains (losses) included in principal transactions 330 111
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 171 186
Transfers out of Level 3 (132) (288)
Purchases, assets 867 802
Issuance, assets 0 0
Sales, assets (1,295) (1,244)
Settlements, assets 7 (11)
Balance at end of period, asset 324 376
Unrealized gains (losses) still held, assets 69 (29)
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 3,684 2,219
Net realized/unrealized gains (losses) included in principal transactions (527) 547
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 279 344
Transfers out of Level 3 (4,057) (371)
Purchases, assets 955 1,377
Issuance, assets (11) 0
Sales, assets (196) (432)
Settlements, assets 0 0
Balance at end of period, asset 127 3,684
Unrealized gains (losses) still held, assets (457) 464
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 2,739 3,294
Net realized/unrealized gains (losses) included in principal transactions 53 141
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 205 663
Transfers out of Level 3 (360) (282)
Purchases, assets 2,199 4,426
Issuance, assets 0 0
Sales, assets (2,965) (5,503)
Settlements, assets (3) 0
Balance at end of period, asset 1,868 2,739
Unrealized gains (losses) still held, assets (46) (174)
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 2,483 4,372
Net realized/unrealized gains (losses) included in principal transactions (58) 180
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 2,070 968
Transfers out of Level 3 (2,708) (3,290)
Purchases, assets 2,894 2,504
Issuance, assets 19 51
Sales, assets (1,838) (2,110)
Settlements, assets (48) (192)
Balance at end of period, asset 2,814 2,483
Unrealized gains (losses) still held, assets (101) (45)
Investments    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 5,059 6,273
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 99 (46)
Transfers into Level 3 954 1,156
Transfers out of Level 3 (2,054) (1,230)
Purchases, assets 1,842 1,890
Issuance, assets 0 0
Sales, assets (1,557) (2,126)
Settlements, assets (482) (858)
Balance at end of period, asset 3,861 5,059
Unrealized gains (losses) still held, assets (109) (78)
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 139 38
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (26) 29
Transfers into Level 3 25 171
Transfers out of Level 3 (72) (118)
Purchases, assets 45 62
Issuance, assets 0 0
Sales, assets (9) (43)
Settlements, assets (1) 0
Balance at end of period, asset 101 139
Unrealized gains (losses) still held, assets 54 (2)
Investments | Mortgage-backed securities - Residential    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 4 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 3 (1)
Transfers into Level 3 49 4
Transfers out of Level 3 0 0
Purchases, assets 26 11
Issuance, assets 0 0
Sales, assets (32) (18)
Settlements, assets 0 0
Balance at end of period, asset 50 4
Unrealized gains (losses) still held, assets 2 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 2 1
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) 0
Transfers into Level 3 6 4
Transfers out of Level 3 (7) (3)
Purchases, assets 0 0
Issuance, assets 0 0
Sales, assets 0 0
Settlements, assets 0 0
Balance at end of period, asset 0 2
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 145 47
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (24) 28
Transfers into Level 3 80 179
Transfers out of Level 3 (79) (121)
Purchases, assets 71 73
Issuance, assets 0 0
Sales, assets (41) (61)
Settlements, assets (1) 0
Balance at end of period, asset 151 145
Unrealized gains (losses) still held, assets 56 (2)
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 4 6
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 0 0
Purchases, assets 0 6
Issuance, assets 0 0
Sales, assets (2) (8)
Settlements, assets 0 0
Balance at end of period, asset 2 4
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 2,192 2,180
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 39 (23)
Transfers into Level 3 467 834
Transfers out of Level 3 (1,598) (721)
Purchases, assets 351 842
Issuance, assets 0 0
Sales, assets (240) (671)
Settlements, assets 0 (249)
Balance at end of period, asset 1,211 2,192
Unrealized gains (losses) still held, assets 23 9
Investments | Foreign government    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 260 678
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 10 45
Transfers into Level 3 38 (5)
Transfers out of Level 3 (39) (270)
Purchases, assets 259 601
Issuance, assets 0 0
Sales, assets (339) (519)
Settlements, assets (3) (270)
Balance at end of period, asset 186 260
Unrealized gains (losses) still held, assets (104) (1)
Investments | Corporate    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 603 672
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 77 (7)
Transfers into Level 3 11 15
Transfers out of Level 3 (240) (52)
Purchases, assets 693 144
Issuance, assets 0 0
Sales, assets (468) (134)
Settlements, assets (365) (35)
Balance at end of period, asset 311 603
Unrealized gains (losses) still held, assets 0 (4)
Investments | Equity securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 124 681
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 10 (22)
Transfers into Level 3 5 12
Transfers out of Level 3 (5) (14)
Purchases, assets 1 7
Issuance, assets 0 0
Sales, assets (131) (540)
Settlements, assets 5 0
Balance at end of period, asset 9 124
Unrealized gains (losses) still held, assets 0 (120)
Investments | Asset-backed securities    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 596 549
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (92) (17)
Transfers into Level 3 7 45
Transfers out of Level 3 (61) (58)
Purchases, assets 435 202
Issuance, assets 0 0
Sales, assets (306) (125)
Settlements, assets 81 0
Balance at end of period, asset 660 596
Unrealized gains (losses) still held, assets (102) 14
Investments | Other debt 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 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 0 0
Transfers into Level 3 10 0
Transfers out of Level 3 0 0
Purchases, assets 6 10
Issuance, assets 0 0
Sales, assets (16) (10)
Settlements, assets 0 0
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 1,135 1,460
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 79 (50)
Transfers into Level 3 336 76
Transfers out of Level 3 (32) 6
Purchases, assets 26 5
Issuance, assets 0 0
Sales, assets (14) (58)
Settlements, assets (199) (304)
Balance at end of period, asset 1,331 1,135
Unrealized gains (losses) still held, assets 18 26
Loans    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 2,166 3,108
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (61) (303)
Transfers into Level 3 89 689
Transfers out of Level 3 (1,074) (805)
Purchases, assets 708 1,190
Issuance, assets 219 461
Sales, assets (813) (807)
Settlements, assets (666) (1,367)
Balance at end of period, asset 568 2,166
Unrealized gains (losses) still held, assets 26 24
Mortgage servicing rights    
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation    
Balance at beginning of period, asset 1,781 1,845
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets (36) 110
Transfers into Level 3 0 0
Transfers out of Level 3 0 0
Purchases, assets 0 0
Issuance, assets 152 214
Sales, assets (20) (38)
Settlements, assets (313) (350)
Balance at end of period, asset 1,564 1,781
Unrealized gains (losses) still held, assets (21) (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 180 78
Net realized/unrealized gains (losses) included in principal transactions 0 0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets 80 100
Transfers into Level 3 55 201
Transfers out of Level 3 (47) (66)
Purchases, assets 1 6
Issuance, assets 236 208
Sales, assets (133) (85)
Settlements, assets (338) (262)
Balance at end of period, asset 34 180
Unrealized gains (losses) still held, assets $ 39 $ 582