FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
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	$ (2,650)	$ 842	$ (578)	$ (112)
Net realized/unrealized gains (losses) included in principal transactions	601	(287)	(1,703)	4,039
Other	0	0	0	0
Transfers into Level 3	229	(218)	235	(803)
Transfers out of Level 3	61	197	632	(965)
Purchases	(554)	(784)	(774)	(75)
Issuances	0	1	0	27
Sales	18	322	(106)	(754)
Settlements	92	379	91	(905)
Balance at end of period, asset (liability), net	(2,203)	452	(2,203)	452
Unrealized gains (losses) still held	(162)	(184)	(2,320)	1,081
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	(1,962)	881	355	1,726
Net realized/unrealized gains (losses) included in principal transactions	(474)	(278)	(2,163)	322
Other	0	0	0	0
Transfers into Level 3	(18)	(503)	(220)	(430)
Transfers out of Level 3	298	(12)	(361)	(815)
Purchases	51	(195)	38	(186)
Issuances	0	1	0	7
Sales	49	83	62	77
Settlements	253	(3)	486	(727)
Balance at end of period, asset (liability), net	(1,803)	(26)	(1,803)	(26)
Unrealized gains (losses) still held	(637)	(142)	(2,060)	(332)
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	700	156	50	(89)
Net realized/unrealized gains (losses) included in principal transactions	158	(171)	704	993
Other	0	0	0	0
Transfers into Level 3	1	32	105	(443)
Transfers out of Level 3	(24)	(3)	24	(9)
Purchases	50	(146)	152	29
Issuances	0	0	0	20
Sales	(8)	212	(89)	(399)
Settlements	(264)	197	(333)	175
Balance at end of period, asset (liability), net	613	277	613	277
Unrealized gains (losses) still held	159	121	408	240
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	(1,563)	(101)	(1,104)	(2,140)
Net realized/unrealized gains (losses) included in principal transactions	641	162	(237)	2,159
Other	0	0	0	0
Transfers into Level 3	128	60	61	(13)
Transfers out of Level 3	(145)	222	661	429
Purchases	(346)	(347)	(599)	58
Issuances	0	0	0	0
Sales	(21)	28	(65)	(288)
Settlements	171	37	148	(144)
Balance at end of period, asset (liability), net	(1,135)	61	(1,135)	61
Unrealized gains (losses) still held	212	(150)	(596)	1,021
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	330	255	278	422
Net realized/unrealized gains (losses) included in principal transactions	222	110	85	732
Other	0	0	0	0
Transfers into Level 3	96	140	270	95
Transfers out of Level 3	(149)	(134)	91	(543)
Purchases	(389)	(60)	(447)	60
Issuances	0	0	0	0
Sales	(2)	(2)	(14)	(144)
Settlements	(59)	(56)	(214)	(369)
Balance at end of period, asset (liability), net	49	253	49	253
Unrealized gains (losses) still held	120	151	12	412
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	(155)	(349)	(157)	(31)
Net realized/unrealized gains (losses) included in principal transactions	54	(110)	(92)	(167)
Other	0	0	0	0
Transfers into Level 3	22	53	19	(12)
Transfers out of Level 3	81	124	217	(27)
Purchases	80	(36)	82	(36)
Issuances	0	0	0	0
Sales	0	1	0	0
Settlements	(9)	204	4	160
Balance at end of period, asset (liability), net	73	(113)	73	(113)
Unrealized gains (losses) still held	(16)	(164)	(84)	(260)
Other financial liabilities measured on a recurring basis
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	23
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	26
Sales, liability	(21)
Settlements, liability	0
Balance at end of period, liability	28		28
Unrealized gains (losses) still held, liabilities	0
Interest-bearing deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	26	18	15	183
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0	(7)	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	(10)	3	(12)	6
Transfers into Level 3, liabilities	49	0	49	7
Transfers out of Level 3, liabilities	0	0	(1)	(122)
Purchases, liability	0	0	0	0
Issuance, liability	70	2	83	20
Sales, liability	0	0	0	0
Settlements, liability	0	(1)	(10)	(66)
Balance at end of period, liability	155	16	155	16
Unrealized gains (losses) still held, liabilities	(11)	0	(11)	0
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	627	593	1,031	643
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(2)	36	(8)	86
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	0	0	0	0
Transfers out of Level 3, liabilities	0	0	(24)	(3)
Purchases, liability	0	437	1,335	453
Issuance, liability	0	33	0	33
Sales, liability	0	0	0	0
Settlements, liability	(148)	(30)	(1,869)	(43)
Balance at end of period, liability	481	997	481	997
Unrealized gains (losses) still held, liabilities	1	0	1	0
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	62	72	50	65
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	(10)	(13)	11
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	11	13	22	48
Transfers out of Level 3, liabilities	(3)	(2)	(34)	(21)
Purchases, liability	61	46	125	129
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	1
Settlements, liability	(43)	(36)	(88)	(108)
Balance at end of period, liability	88	103	88	103
Unrealized gains (losses) still held, liabilities	(2)	(13)	(2)	(6)
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	4		3
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0		2
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0		0
Transfers into Level 3, liabilities	1		4
Transfers out of Level 3, liabilities	(2)		(2)
Purchases, liability	2		2
Issuance, liability	0		0
Sales, liability	0		0
Settlements, liability	(4)		(4)
Balance at end of period, liability	1		1
Unrealized gains (losses) still held, liabilities	0		0
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 principal transactions, liabilities		(2)		(2)
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		0		0
Issuance, liability		0		0
Sales, liability		0		0
Settlements, liability		0		0
Balance at end of period, liability		2		2
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	296	81	38	105
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	12	40	101
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	16	1	35	41
Transfers out of Level 3, liabilities	(7)	(40)	(23)	(61)
Purchases, liability	1	0	1	0
Issuance, liability	181	6	478	82
Sales, liability	0	0	0	0
Settlements, liability	(31)	(1)	(33)	(31)
Balance at end of period, liability	456	35	456	35
Unrealized gains (losses) still held, liabilities	(21)	(17)	(31)	(22)
Long-term debt
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Transfers out of Level 3	(1,300)		(7,400)
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	37,204	29,778	36,117	25,509
Net realized/unrealized gains (losses) included in principal transactions, liabilities	2,816	3,734	2,589	11,979
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	1,010	2,831	4,238	9,574
Transfers out of Level 3, liabilities	(1,336)	(811)	(7,442)	(4,318)
Purchases, liability	0	0	0	0
Issuance, liability	3,027	3,838	7,371	13,537
Sales, liability	0	0	0	0
Settlements, liability	(1,439)	(192)	(2,045)	(613)
Balance at end of period, liability	35,650	31,710	35,650	31,710
Unrealized gains (losses) still held, liabilities	2,112	3,336	841	9,530
Other financial liabilities measured on a recurring basis
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability		0	2	1
Net realized/unrealized gains (losses) included in principal transactions, liabilities		0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities		(8)	1	(7)
Transfers into Level 3, liabilities		5	0	5
Transfers out of Level 3, liabilities		0	(1)	0
Purchases, liability		0	0	0
Issuance, liability		0	49	0
Sales, liability		0	(21)	0
Settlements, liability		0	0	0
Balance at end of period, liability	28	13	28	13
Unrealized gains (losses) still held, liabilities		0	0	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	140	183	149	231
Net realized/unrealized gains (losses) included in principal transactions	1	(1)	4	(2)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	(2)	0
Purchases, assets	126	128	263	252
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(132)	(169)	(279)	(340)
Balance at end of period, asset	135	141	135	141
Unrealized gains (losses) still held, assets	9	3	9	14
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	3,953	3,484	2,940	2,520
Net realized/unrealized gains (losses) included in principal transactions	(153)	50	323	168
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	531	514	1,484	1,969
Transfers out of Level 3, assets	(764)	(591)	(1,493)	(1,461)
Purchases, assets	1,449	944	3,265	3,305
Issuance, assets	0	11	0	27
Sales, assets	(1,461)	(1,137)	(2,964)	(3,245)
Settlements, assets	0	(5)	0	(13)
Balance at end of period, asset	3,555	3,270	3,555	3,270
Unrealized gains (losses) still held, assets	(349)	(121)	(343)	(469)
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	659	708	600	496
Net realized/unrealized gains (losses) included in principal transactions	(21)	(28)	(31)	(41)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	93	54	278	181
Transfers out of Level 3, assets	(155)	(153)	(421)	(311)
Purchases, assets	92	310	462	794
Issuance, assets	0	0	0	0
Sales, assets	(130)	(219)	(350)	(447)
Settlements, assets	0	0	0	0
Balance at end of period, asset	538	672	538	672
Unrealized gains (losses) still held, assets	(14)	(33)	(34)	(53)
Trading non-derivative assets | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	145	153	166	104
Net realized/unrealized gains (losses) included in principal transactions	(1)	(2)	(2)	(2)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	31	25	92	86
Transfers out of Level 3, assets	(3)	(22)	(65)	(54)
Purchases, assets	52	33	152	118
Issuance, assets	0	0	0	0
Sales, assets	(59)	(45)	(178)	(110)
Settlements, assets	0	0	0	0
Balance at end of period, asset	165	142	165	142
Unrealized gains (losses) still held, assets	(3)	(2)	(17)	(1)
Trading non-derivative assets | Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	182	138	145	81
Net realized/unrealized gains (losses) included in principal transactions	(8)	(4)	(23)	(9)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	59	20	163	117
Transfers out of Level 3, assets	(25)	(17)	(56)	(51)
Purchases, assets	26	5	76	14
Issuance, assets	0	0	0	0
Sales, assets	(29)	(26)	(100)	(36)
Settlements, assets	0	0	0	0
Balance at end of period, asset	205	116	205	116
Unrealized gains (losses) still held, assets	(8)	1	(19)	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	986	999	911	681
Net realized/unrealized gains (losses) included in principal transactions	(30)	(34)	(56)	(52)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	183	99	533	384
Transfers out of Level 3, assets	(183)	(192)	(542)	(416)
Purchases, assets	170	348	690	926
Issuance, assets	0	0	0	0
Sales, assets	(218)	(290)	(628)	(593)
Settlements, assets	0	0	0	0
Balance at end of period, asset	908	930	908	930
Unrealized gains (losses) still held, assets	(25)	(34)	(70)	(47)
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	1	1	4
Net realized/unrealized gains (losses) included in principal transactions	0	0	(1)	(4)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	0	0	2
Transfers out of Level 3, assets	0	0	0	(1)
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	0	(1)	0	(1)
Balance at end of period, asset	0	0	0	0
Unrealized gains (losses) still held, assets	0	0	0	0
Trading non-derivative assets | State and municipal
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	3	80	7	37
Net realized/unrealized gains (losses) included in principal transactions	0	4	(3)	9
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	4	19	75
Transfers out of Level 3, assets	0	(6)	0	(26)
Purchases, assets	0	14	0	15
Issuance, assets	0	0	0	0
Sales, assets	0	(74)	(20)	(88)
Settlements, assets	0	0	0	0
Balance at end of period, asset	3	22	3	22
Unrealized gains (losses) still held, assets	0	0	(1)	(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	81	364	119	23
Net realized/unrealized gains (losses) included in principal transactions	(23)	(14)	(17)	(40)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	5	8	304
Transfers out of Level 3, assets	(31)	(4)	(58)	(5)
Purchases, assets	70	70	131	157
Issuance, assets	0	0	0	0
Sales, assets	(28)	(41)	(114)	(59)
Settlements, assets	0	0	0	0
Balance at end of period, asset	69	380	69	380
Unrealized gains (losses) still held, assets	19	(9)	22	(19)
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	581	537	394	412
Net realized/unrealized gains (losses) included in principal transactions	224	21	300	89
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	38	193	248	455
Transfers out of Level 3, assets	(303)	(72)	(481)	(350)
Purchases, assets	624	91	976	919
Issuance, assets	0	0	0	0
Sales, assets	(400)	(310)	(673)	(1,065)
Settlements, assets	0	0	0	0
Balance at end of period, asset	764	460	764	460
Unrealized gains (losses) still held, assets	(232)	(15)	(185)	(109)
Trading non-derivative assets | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	285	133	192	174
Net realized/unrealized gains (losses) included in principal transactions	2	48	11	34
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	16	71	42	134
Transfers out of Level 3, assets	(10)	(12)	(18)	(99)
Purchases, assets	28	34	125	142
Issuance, assets	0	0	0	0
Sales, assets	(58)	(87)	(89)	(198)
Settlements, assets	0	0	0	0
Balance at end of period, asset	263	187	263	187
Unrealized gains (losses) still held, assets	1	(26)	10	(47)
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	539	554	668	613
Net realized/unrealized gains (losses) included in principal transactions	6	(7)	20	(26)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	15	68	94	208
Transfers out of Level 3, assets	(39)	(25)	(120)	(192)
Purchases, assets	297	196	615	589
Issuance, assets	0	0	0	0
Sales, assets	(243)	(174)	(702)	(580)
Settlements, assets	0	0	0	0
Balance at end of period, asset	575	612	575	612
Unrealized gains (losses) still held, assets	2	(18)	4	(151)
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	1,478	816	648	576
Net realized/unrealized gains (losses) included in principal transactions	(332)	32	69	158
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	279	74	540	407
Transfers out of Level 3, assets	(198)	(280)	(274)	(372)
Purchases, assets	260	191	728	557
Issuance, assets	0	11	0	27
Sales, assets	(514)	(161)	(738)	(662)
Settlements, assets	0	(4)	0	(12)
Balance at end of period, asset	973	679	973	679
Unrealized gains (losses) still held, assets	(114)	(19)	(123)	(95)
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,764	2,263	2,049	2,227
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(24)	(70)	(27)	(217)
Transfers into Level 3	39	88	67	503
Transfers out of Level 3, assets	(240)	(69)	(401)	(373)
Purchases, assets	184	315	922	725
Issuance, assets	0	0	0	0
Sales, assets	(200)	(294)	(1,087)	(632)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1,523	2,233	1,523	2,233
Unrealized gains (losses) still held, assets	(34)	(65)	(35)	(122)
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	32	28	30	51
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	(2)	(1)	(11)
Transfers into Level 3	0	0	0	1
Transfers out of Level 3, assets	(3)	0	(3)	(10)
Purchases, assets	0	0	4	4
Issuance, assets	0	0	0	0
Sales, assets	0	0	(1)	(9)
Settlements, assets	0	0	0	0
Balance at end of period, asset	29	26	29	26
Unrealized gains (losses) still held, assets	0	(2)	(3)	(5)
Investments | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	25	40	41	94
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(1)	(4)	(1)	(10)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	(39)
Purchases, assets	0	3	0	3
Issuance, assets	0	0	0	0
Sales, assets	0	0	(16)	(9)
Settlements, assets	0	0	0	0
Balance at end of period, asset	24	39	24	39
Unrealized gains (losses) still held, assets	(1)	(5)	(1)	(6)
Investments | Commercial
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
Investments | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	57	68	71	145
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(1)	(6)	(2)	(21)
Transfers into Level 3	0	0	0	1
Transfers out of Level 3, assets	(3)	0	(3)	(49)
Purchases, assets	0	3	4	7
Issuance, assets	0	0	0	0
Sales, assets	0	0	(17)	(18)
Settlements, assets	0	0	0	0
Balance at end of period, asset	53	65	53	65
Unrealized gains (losses) still held, assets	(1)	(7)	(4)	(11)
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	21	0	0	1
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(1)	0	(1)	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	51	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	(30)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	20	0	20	0
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | State and municipal
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	507	539	586	772
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(29)	(20)	(20)	(98)
Transfers into Level 3	1	81	2	81
Transfers out of Level 3, assets	0	0	(77)	(142)
Purchases, assets	45	0	46	1
Issuance, assets	0	0	0	0
Sales, assets	(31)	(25)	(44)	(39)
Settlements, assets	0	0	0	0
Balance at end of period, asset	493	575	493	575
Unrealized gains (losses) still held, assets	(29)	(14)	(23)	(73)
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	414	1,001	608	786
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(12)	(53)	(7)	(92)
Transfers into Level 3	2	6	27	256
Transfers out of Level 3, assets	(179)	(56)	(197)	(169)
Purchases, assets	124	224	647	609
Issuance, assets	0	0	0	0
Sales, assets	(153)	(262)	(882)	(530)
Settlements, assets	0	0	0	0
Balance at end of period, asset	196	860	196	860
Unrealized gains (losses) still held, assets	1	(44)	1	(36)
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	290	334	343	188
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	4	(1)	(3)
Transfers into Level 3	0	1	0	154
Transfers out of Level 3, assets	0	(3)	(61)	(3)
Purchases, assets	15	1	96	1
Issuance, assets	0	0	0	0
Sales, assets	(16)	0	(88)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	289	337	289	337
Unrealized gains (losses) still held, assets	0	0	(4)	(2)
Investments | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	13	10	10	16
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(2)	0	1	(6)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	11	10	11	10
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | Asset-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1	1	1	3
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(1)	8	(1)	19
Transfers into Level 3	30	0	30	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	(7)	0	(20)
Settlements, assets	0	0	0	0
Balance at end of period, asset	30	2	30	2
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | Other debt securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	57		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	1		1
Transfers into Level 3	0		0
Transfers out of Level 3, assets	(58)		(63)
Purchases, assets	0		62
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
Investments | Non-marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	404	310	430	316
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	21	(3)	3	(15)
Transfers into Level 3	6	0	8	11
Transfers out of Level 3, assets	0	(10)	0	(10)
Purchases, assets	0	87	16	107
Issuance, assets	0	0	0	0
Sales, assets	0	0	(26)	(25)
Settlements, assets	0	0	0	0
Balance at end of period, asset	431	384	431	384
Unrealized gains (losses) still held, assets	(5)	0	(5)	0
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	241	325	1,361	711
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	15	5	(249)	(185)
Transfers into Level 3	0	83	2	84
Transfers out of Level 3, assets	0	(3)	(309)	(198)
Purchases, assets	0	0	0	0
Issuance, assets	10	333	116	334
Sales, assets	0	0	0	0
Settlements, assets	(1)	(108)	(656)	(111)
Balance at end of period, asset	265	635	265	635
Unrealized gains (losses) still held, assets	(82)	(6)	(104)	(52)
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	681	600	665	404
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	42	37	61	195
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	0
Issuance, assets	23	25	54	94
Sales, assets	0	0	0	0
Settlements, assets	(17)	(15)	(51)	(46)
Balance at end of period, asset	729	647	729	647
Unrealized gains (losses) still held, assets	41	38	62	194
Other financial assets measured at fair value on a recurring basis
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	73	63	57	73
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	(22)	(19)	(24)	(13)
Transfers into Level 3	0	22	0	29
Transfers out of Level 3, assets	0	0	(2)	(16)
Purchases, assets	28	7	50	21
Issuance, assets	0	(1)	0	39
Sales, assets	(2)	(16)	(4)	(17)
Settlements, assets	0	(6)	0	(66)
Balance at end of period, asset	77	50	77	50
Unrealized gains (losses) still held, assets	$ 0	$ (12)	$ 0	$ 8