FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Trading derivatives, net
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	$ (1,325)	$ (2,218)
Net realized/unrealized gains (losses) included in principal transactions	(152)	(739)
Other	0	0
Transfers into Level 3	(113)	(83)
Transfers out of Level 3	283	240
Purchases	(1,104)	415
Issuances	3	6
Sales	(93)	(31)
Settlements	193	(534)
Balance at end of period, asset (liability), net	(2,308)	(2,944)
Unrealized gains (losses) still held	(250)	(264)
Trading derivatives, net | 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	(330)	(1,085)
Net realized/unrealized gains (losses) included in principal transactions	(232)	(485)
Other	0	0
Transfers into Level 3	(14)	31
Transfers out of Level 3	(98)	(29)
Purchases	(9)	(27)
Issuances	3	6
Sales	(9)	3
Settlements	52	224
Balance at end of period, asset (liability), net	(637)	(1,362)
Unrealized gains (losses) still held	(321)	(580)
Trading derivatives, net | 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	185	295
Net realized/unrealized gains (losses) included in principal transactions	(74)	(46)
Other	0	0
Transfers into Level 3	62	2
Transfers out of Level 3	50	93
Purchases	41	694
Issuances	0	0
Sales	(59)	(22)
Settlements	(24)	(681)
Balance at end of period, asset (liability), net	181	335
Unrealized gains (losses) still held	(137)	(147)
Trading derivatives, net | 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	(1,688)	(1,634)
Net realized/unrealized gains (losses) included in principal transactions	135	(349)
Other	0	0
Transfers into Level 3	(148)	(144)
Transfers out of Level 3	133	213
Purchases	(914)	(270)
Issuances	0	0
Sales	(21)	(1)
Settlements	298	(37)
Balance at end of period, asset (liability), net	(2,205)	(2,222)
Unrealized gains (losses) still held	44	383
Trading derivatives, net | 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	404	279
Net realized/unrealized gains (losses) included in principal transactions	97	82
Other	0	0
Transfers into Level 3	(23)	31
Transfers out of Level 3	116	(6)
Purchases	(126)	10
Issuances	0	0
Sales	(4)	(11)
Settlements	(139)	(43)
Balance at end of period, asset (liability), net	325	342
Unrealized gains (losses) still held	104	143
Trading derivatives, net | 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	104	(73)
Net realized/unrealized gains (losses) included in principal transactions	(78)	59
Other	0	0
Transfers into Level 3	10	(3)
Transfers out of Level 3	82	(31)
Purchases	(96)	8
Issuances	0	0
Sales	0	0
Settlements	6	3
Balance at end of period, asset (liability), net	28	(37)
Unrealized gains (losses) still held	60	(63)
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	0
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0
Transfers into Level 3, liabilities	0
Transfers out of Level 3, liabilities	0
Purchases, liability	0
Issuance, liability	1
Sales, liability	0
Settlements, liability	0
Balance at end of period, liability	1
Unrealized gains (losses) still held, liabilities	0
Deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	39	29
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	3
Transfers into Level 3, liabilities	0	46
Transfers out of Level 3, liabilities	0	(1)
Purchases, liability	0	0
Issuance, liability	19	5
Sales, liability	0	0
Settlements, liability	(11)	(4)
Balance at end of period, liability	47	72
Unrealized gains (losses) still held, liabilities	(6)	3
Securities loaned and sold under agreements to repurchase
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	390	390
Net realized/unrealized gains (losses) included in principal transactions, liabilities	3	0
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	0	0
Purchases, liability	732	254
Issuance, liability	0	0
Sales, liability	0	0
Settlements, liability	(321)	(318)
Balance at end of period, liability	798	326
Unrealized gains (losses) still held, liabilities	2	0
Securities sold, not yet purchased | Securities Sold, Not yet Purchased [Member]
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	28	35
Net realized/unrealized gains (losses) included in principal transactions, liabilities	29	(6)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0
Transfers into Level 3, liabilities	2	1
Transfers out of Level 3, liabilities	(5)	(2)
Purchases, liability	57	87
Issuance, liability	0	0
Sales, liability	0	0
Settlements, liability	(24)	(22)
Balance at end of period, liability	29	105
Unrealized gains (losses) still held, liabilities	10	(5)
Securities sold, not yet purchased | Other trading liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	0
Net realized/unrealized gains (losses) included in principal transactions, liabilities	1
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0
Transfers into Level 3, liabilities	0
Transfers out of Level 3, liabilities	(2)
Purchases, liability	25
Issuance, liability	0
Sales, liability	0
Settlements, liability	(22)
Balance at end of period, liability	0
Unrealized gains (losses) still held, liabilities	0
Other trading liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability		0
Net realized/unrealized gains (losses) included in principal transactions, liabilities		0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities		0
Transfers into Level 3, liabilities		0
Transfers out of Level 3, liabilities		0
Purchases, liability		0
Issuance, liability		0
Sales, liability		0
Settlements, liability		0
Balance at end of period, liability		0
Unrealized gains (losses) still held, liabilities		0
Short-term borrowings
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	297	481
Net realized/unrealized gains (losses) included in principal transactions, liabilities	9	(94)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0
Transfers into Level 3, liabilities	14	11
Transfers out of Level 3, liabilities	(35)	(38)
Purchases, liability	0	1
Issuance, liability	573	34
Sales, liability	0	0
Settlements, liability	(119)	0
Balance at end of period, liability	721	583
Unrealized gains (losses) still held, liabilities	8	(64)
Long-term debt
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	21,100	38,380
Net realized/unrealized gains (losses) included in principal transactions, liabilities	51	595
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0
Transfers into Level 3, liabilities	612	1,358
Transfers out of Level 3, liabilities	(841)	(840)
Purchases, liability	0	0
Issuance, liability	1,284	3,590
Sales, liability	0	0
Settlements, liability	(663)	(1,529)
Balance at end of period, liability	21,441	40,364
Unrealized gains (losses) still held, liabilities	71	619
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability		6
Net realized/unrealized gains (losses) included in principal transactions, liabilities		0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities		0
Transfers into Level 3, liabilities		0
Transfers out of Level 3, liabilities		0
Purchases, liability		0
Issuance, liability		3
Sales, liability		0
Settlements, liability		(6)
Balance at end of period, liability		3
Unrealized gains (losses) still held, liabilities		0
Securities borrowed and purchased under agreements to resell
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	128	139
Net realized/unrealized gains (losses) included in principal transactions	6	(5)
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	(84)	0
Purchases, assets	150	45
Issuance, assets	0	0
Sales, assets	0	0
Settlements, assets	(47)	(47)
Balance at end of period, asset	153	132
Unrealized gains (losses) still held, assets	3	(4)
Trading mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,377	3,119
Net realized/unrealized gains (losses) included in principal transactions	81	142
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	281	254
Transfers out of Level 3, assets	(150)	(714)
Purchases, assets	738	1,237
Issuance, assets	12	4
Sales, assets	(343)	(1,231)
Settlements, assets	(8)	(19)
Balance at end of period, asset	1,988	2,792
Unrealized gains (losses) still held, assets	132	60
Trading mortgage-backed securities | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	404	899
Net realized/unrealized gains (losses) included in principal transactions	20	(23)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	188	128
Transfers out of Level 3, assets	(57)	(256)
Purchases, assets	423	610
Issuance, assets	0	0
Sales, assets	(159)	(498)
Settlements, assets	0	0
Balance at end of period, asset	819	860
Unrealized gains (losses) still held, assets	22	(27)
Trading mortgage-backed securities | 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	301	581
Net realized/unrealized gains (losses) included in principal transactions	23	(39)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	156	79
Transfers out of Level 3, assets	(36)	(154)
Purchases, assets	320	200
Issuance, assets	0	0
Sales, assets	(150)	(136)
Settlements, assets	0	0
Balance at end of period, asset	614	531
Unrealized gains (losses) still held, assets	25	(33)
Trading mortgage-backed securities | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	67	116
Net realized/unrealized gains (losses) included in principal transactions	1	2
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	11	36
Transfers out of Level 3, assets	(12)	(35)
Purchases, assets	60	313
Issuance, assets	0	0
Sales, assets	(9)	(262)
Settlements, assets	0	0
Balance at end of period, asset	118	170
Unrealized gains (losses) still held, assets	0	2
Trading mortgage-backed securities | Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	36	202
Net realized/unrealized gains (losses) included in principal transactions	(4)	14
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	21	13
Transfers out of Level 3, assets	(9)	(67)
Purchases, assets	43	97
Issuance, assets	0	0
Sales, assets	0	(100)
Settlements, assets	0	0
Balance at end of period, asset	87	159
Unrealized gains (losses) still held, assets	(3)	4
Trading mortgage-backed securities | 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	7
Net realized/unrealized gains (losses) included in principal transactions	0	4
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	(1)	(1)
Purchases, assets	0	0
Issuance, assets	0	0
Sales, assets	0	0
Settlements, assets	0	(10)
Balance at end of period, asset	0	0
Unrealized gains (losses) still held, assets	0	0
Trading mortgage-backed securities | State and municipal
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	11	3
Net realized/unrealized gains (losses) included in principal transactions	1	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	(11)	0
Purchases, assets	0	0
Issuance, assets	0	0
Sales, assets	0	(2)
Settlements, assets	0	0
Balance at end of period, asset	1	1
Unrealized gains (losses) still held, assets	0	0
Trading mortgage-backed securities | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	15	54
Net realized/unrealized gains (losses) included in principal transactions	1	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	0	12
Transfers out of Level 3, assets	(6)	(40)
Purchases, assets	0	125
Issuance, assets	0	0
Sales, assets	(7)	(38)
Settlements, assets	0	0
Balance at end of period, asset	3	113
Unrealized gains (losses) still held, assets	1	2
Trading mortgage-backed securities | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	269	500
Net realized/unrealized gains (losses) included in principal transactions	(16)	73
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	17	13
Transfers out of Level 3, assets	(60)	(208)
Purchases, assets	93	260
Issuance, assets	0	0
Sales, assets	(53)	(166)
Settlements, assets	0	(8)
Balance at end of period, asset	250	464
Unrealized gains (losses) still held, assets	(6)	68
Trading mortgage-backed securities | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	166	292
Net realized/unrealized gains (losses) included in principal transactions	5	18
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	22	29
Transfers out of Level 3, assets	(2)	(23)
Purchases, assets	71	31
Issuance, assets	0	0
Sales, assets	(35)	(115)
Settlements, assets	0	0
Balance at end of period, asset	227	232
Unrealized gains (losses) still held, assets	29	10
Trading mortgage-backed securities | Asset-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	178	531
Net realized/unrealized gains (losses) included in principal transactions	(9)	3
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	10	15
Transfers out of Level 3, assets	(5)	(118)
Purchases, assets	97	136
Issuance, assets	0	0
Sales, assets	(51)	(197)
Settlements, assets	0	0
Balance at end of period, asset	220	370
Unrealized gains (losses) still held, assets	(6)	(39)
Trading mortgage-backed securities | Other debt securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	333	833
Net realized/unrealized gains (losses) included in principal transactions	79	67
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0
Transfers into Level 3	44	57
Transfers out of Level 3, assets	(8)	(68)
Purchases, assets	54	75
Issuance, assets	12	4
Sales, assets	(38)	(215)
Settlements, assets	(8)	(1)
Balance at end of period, asset	468	752
Unrealized gains (losses) still held, assets	92	46
Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,076	1,799
Net realized/unrealized gains (losses) included in principal transactions	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	8	(62)
Transfers into Level 3	22	36
Transfers out of Level 3, assets	(57)	(287)
Purchases, assets	358	119
Issuance, assets	0	0
Sales, assets	(306)	(166)
Settlements, assets	0	0
Balance at end of period, asset	1,101	1,439
Unrealized gains (losses) still held, assets	14	(37)
Mortgage-backed securities | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	64	191
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)	(4)
Transfers into Level 3	0	0
Transfers out of Level 3, assets	(8)	(90)
Purchases, assets	0	3
Issuance, assets	0	0
Sales, assets	(13)	(48)
Settlements, assets	0	0
Balance at end of period, asset	42	52
Unrealized gains (losses) still held, assets	(1)	(4)
Mortgage-backed securities | 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	36	75
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)	(3)
Transfers into Level 3	0	0
Transfers out of Level 3, assets	(3)	0
Purchases, assets	0	3
Issuance, assets	0	0
Sales, assets	0	(48)
Settlements, assets	0	0
Balance at end of period, asset	32	27
Unrealized gains (losses) still held, assets	(1)	(3)
Mortgage-backed securities | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	28	116
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	(5)	(90)
Purchases, assets	0	0
Issuance, assets	0	0
Sales, assets	(13)	0
Settlements, assets	0	0
Balance at end of period, asset	10	25
Unrealized gains (losses) still held, assets	0	(1)
Mortgage-backed securities | Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0
Net realized/unrealized gains (losses) included in principal transactions	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0
Transfers into Level 3	0
Transfers out of Level 3, assets	0
Purchases, assets	0
Issuance, assets	0
Sales, assets	0
Settlements, assets	0
Balance at end of period, asset	0
Unrealized gains (losses) still held, assets	0
Mortgage-backed securities | 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	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	0	0
Issuance, assets	0	0
Sales, assets	0	0
Settlements, assets	0	0
Balance at end of period, asset	0	0
Unrealized gains (losses) still held, assets	0	0
Mortgage-backed securities | State and municipal
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	428	542
Net realized/unrealized gains (losses) included in principal transactions	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	4	(26)
Transfers into Level 3	22	0
Transfers out of Level 3, assets	(13)	(1)
Purchases, assets	248	0
Issuance, assets	0	0
Sales, assets	(254)	(36)
Settlements, assets	0	0
Balance at end of period, asset	435	479
Unrealized gains (losses) still held, assets	5	(28)
Mortgage-backed securities | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	12	194
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)	(8)
Transfers into Level 3	0	6
Transfers out of Level 3, assets	(2)	(168)
Purchases, assets	0	36
Issuance, assets	0	0
Sales, assets	0	(36)
Settlements, assets	0	0
Balance at end of period, asset	9	24
Unrealized gains (losses) still held, assets	(1)	0
Mortgage-backed securities | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	146	362
Net realized/unrealized gains (losses) included in principal transactions	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	9	0
Transfers into Level 3	0	30
Transfers out of Level 3, assets	(32)	(28)
Purchases, assets	97	41
Issuance, assets	0	0
Sales, assets	(26)	(17)
Settlements, assets	0	0
Balance at end of period, asset	194	388
Unrealized gains (losses) still held, assets	8	6
Mortgage-backed securities | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	14	27
Net realized/unrealized gains (losses) included in principal transactions	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(8)	(19)
Transfers into Level 3	0	0
Transfers out of Level 3, assets	0	0
Purchases, assets	0	0
Issuance, assets	0	0
Sales, assets	0	0
Settlements, assets	0	0
Balance at end of period, asset	6	8
Unrealized gains (losses) still held, assets	(2)	0
Mortgage-backed securities | Asset-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2	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	0	0
Transfers out of Level 3, assets	(2)	0
Purchases, assets	0	0
Issuance, assets	0	0
Sales, assets	0	0
Settlements, assets	0	0
Balance at end of period, asset	0	0
Unrealized gains (losses) still held, assets	0	0
Mortgage-backed securities | Other debt securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	6	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	0	0
Transfers out of Level 3, assets	0	0
Purchases, assets	1	0
Issuance, assets	0	0
Sales, assets	(6)	0
Settlements, assets	0	0
Balance at end of period, asset	1	0
Unrealized gains (losses) still held, assets	0	0
Mortgage-backed securities | Non Marketable Equity Securities [Member]
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	404	483
Net realized/unrealized gains (losses) included in principal transactions	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	5	(5)
Transfers into Level 3	0	0
Transfers out of Level 3, assets	0	0
Purchases, assets	12	39
Issuance, assets	0	0
Sales, assets	(7)	(29)
Settlements, assets	0	0
Balance at end of period, asset	414	488
Unrealized gains (losses) still held, assets	5	(11)
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	262	427
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	(29)
Transfers into Level 3	0	663
Transfers out of Level 3, assets	(2)	(40)
Purchases, assets	0	0
Issuance, assets	4	104
Sales, assets	0	0
Settlements, assets	(23)	(68)
Balance at end of period, asset	318	1,057
Unrealized gains (losses) still held, assets	82	(6)
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	760	691
Net realized/unrealized gains (losses) included in principal transactions	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(15)	12
Transfers into Level 3	0	0
Transfers out of Level 3, assets	0	0
Purchases, assets	0	0
Issuance, assets	25	17
Sales, assets	0	0
Settlements, assets	(19)	(18)
Balance at end of period, asset	751	702
Unrealized gains (losses) still held, assets	(16)	18
Other financial assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	15	30
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	1	3
Issuance, assets	11	13
Sales, assets	0	0
Settlements, assets	(14)	(14)
Balance at end of period, asset	13	31
Unrealized gains (losses) still held, assets	$ 0	$ (1)