FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
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	$ (2,049)	$ (2,650)	$ (2,218)	$ (578)
Net realized/unrealized gains (losses) included in principal transactions	(144)	601	(285)	(1,703)
Other	0	0	0	0
Transfers into Level 3	(22)	229	109	235
Transfers out of Level 3	58	61	619	632
Purchases	(242)	(554)	(734)	(774)
Issuances	5	0	19	0
Sales	(85)	18	(340)	(106)
Settlements	277	92	628	91
Balance at end of period, asset (liability), net	(2,202)	(2,203)	(2,202)	(2,203)
Unrealized gains (losses) still held	(490)	(162)	(545)	(2,320)
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	(1,028)	(1,962)	(1,085)	355
Net realized/unrealized gains (losses) included in principal transactions	(73)	(474)	(756)	(2,163)
Other	0	0	0	0
Transfers into Level 3	39	(18)	169	(220)
Transfers out of Level 3	523	298	506	(361)
Purchases	3	51	83	38
Issuances	5	0	19	0
Sales	(18)	49	(35)	62
Settlements	233	253	783	486
Balance at end of period, asset (liability), net	(316)	(1,803)	(316)	(1,803)
Unrealized gains (losses) still held	(248)	(637)	(252)	(2,060)
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	551	700	295	50
Net realized/unrealized gains (losses) included in principal transactions	(7)	158	500	704
Other	0	0	0	0
Transfers into Level 3	13	1	51	105
Transfers out of Level 3	(532)	(24)	(459)	24
Purchases	(18)	50	(91)	152
Issuances	0	0	0	0
Sales	(7)	(8)	(173)	(89)
Settlements	3	(264)	(120)	(333)
Balance at end of period, asset (liability), net	3	613	3	613
Unrealized gains (losses) still held	(81)	159	(49)	408
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	(2,050)	(1,563)	(1,634)	(1,104)
Net realized/unrealized gains (losses) included in principal transactions	(119)	641	(345)	(237)
Other	0	0	0	0
Transfers into Level 3	(59)	128	(130)	61
Transfers out of Level 3	149	(145)	686	661
Purchases	(102)	(346)	(670)	(599)
Issuances	0	0	0	0
Sales	(13)	(21)	(68)	(65)
Settlements	(42)	171	(75)	148
Balance at end of period, asset (liability), net	(2,236)	(1,135)	(2,236)	(1,135)
Unrealized gains (losses) still held	(272)	212	(563)	(596)
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	330	279	278
Net realized/unrealized gains (losses) included in principal transactions	174	222	335	85
Other	0	0	0	0
Transfers into Level 3	(9)	96	23	270
Transfers out of Level 3	(126)	(149)	(138)	91
Purchases	(78)	(389)	(67)	(447)
Issuances	0	0	0	0
Sales	(47)	(2)	(64)	(14)
Settlements	83	(59)	33	(214)
Balance at end of period, asset (liability), net	401	49	401	49
Unrealized gains (losses) still held	204	120	397	12
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	74	(155)	(73)	(157)
Net realized/unrealized gains (losses) included in principal transactions	(119)	54	(19)	(92)
Other	0	0	0	0
Transfers into Level 3	(6)	22	(4)	19
Transfers out of Level 3	44	81	24	217
Purchases	(47)	80	11	82
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	0	(9)	7	4
Balance at end of period, asset (liability), net	(54)	73	(54)	73
Unrealized gains (losses) still held	(93)	(16)	(78)	(84)
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	3		6
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		0
Transfers into Level 3, liabilities	0		0
Transfers out of Level 3, liabilities	0		0
Purchases, liability	0		0
Issuance, liability	0		5
Sales, liability	0		0
Settlements, liability	(2)		(10)
Balance at end of period, liability	1		1
Unrealized gains (losses) still held, liabilities	0		0
Interest-bearing deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	41	26	29	15
Net realized/unrealized gains (losses) included in principal transactions, liabilities	1	0	1	(7)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	1	(10)	5	(12)
Transfers into Level 3, liabilities	0	49	51	49
Transfers out of Level 3, liabilities	(7)	0	(40)	(1)
Purchases, liability	0	0	0	0
Issuance, liability	15	70	30	83
Sales, liability	0	0	0	0
Settlements, liability	(5)	0	(22)	(10)
Balance at end of period, liability	42	155	42	155
Unrealized gains (losses) still held, liabilities	1	(11)	4	(11)
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	286	627	390	1,031
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	(2)	0	(8)
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	0	(24)
Purchases, liability	230	0	668	1,335
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	(224)	(148)	(766)	(1,869)
Balance at end of period, liability	292	481	292	481
Unrealized gains (losses) still held, liabilities	0	1	0	1
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	32	62	35	50
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(9)	0	(17)	(13)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	12	11	26	22
Transfers out of Level 3, liabilities	(16)	(3)	(26)	(34)
Purchases, liability	13	61	109	125
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	(14)	(43)	(125)	(88)
Balance at end of period, liability	36	88	36	88
Unrealized gains (losses) still held, liabilities	(3)	(2)	(1)	(2)
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 principal transactions, liabilities	0		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	0		0
Issuance, liability	0		0
Sales, liability	0		0
Settlements, liability	0		0
Balance at end of period, liability	0		0
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		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
Short-term borrowings
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	201	296	481	38
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(1)	0	(83)	40
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	49	16	69	35
Transfers out of Level 3, liabilities	(10)	(7)	(527)	(23)
Purchases, liability	0	1	1	1
Issuance, liability	107	181	318	478
Sales, liability	0	0	0	0
Settlements, liability	(127)	(31)	(204)	(33)
Balance at end of period, liability	221	456	221	456
Unrealized gains (losses) still held, liabilities	(26)	(21)	(78)	(31)
Long-term debt
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	20,375	37,204	38,380	36,117
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(1,720)	2,816	(293)	2,589
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	636	1,010	3,674	4,238
Transfers out of Level 3, liabilities	(857)	(1,336)	(22,587)	(7,442)
Purchases, liability	0	0	0	0
Issuance, liability	697	3,027	5,479	7,371
Sales, liability	0	0	0	0
Settlements, liability	(262)	(1,439)	(2,930)	(2,045)
Balance at end of period, liability	22,309	35,650	22,309	35,650
Unrealized gains (losses) still held, liabilities	(1,868)	2,112	(1,021)	841
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability		23		2
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		1
Transfers into Level 3, liabilities		0		0
Transfers out of Level 3, liabilities		0		(1)
Purchases, liability		0		0
Issuance, liability		26		49
Sales, liability		(21)		(21)
Settlements, liability		0		0
Balance at end of period, liability		28		28
Unrealized gains (losses) still held, liabilities		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	126	140	139	149
Net realized/unrealized gains (losses) included in principal transactions	12	1	4	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	0
Transfers out of Level 3, assets	0	0	0	(2)
Purchases, assets	45	126	111	263
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(47)	(132)	(118)	(279)
Balance at end of period, asset	136	135	136	135
Unrealized gains (losses) still held, assets	12	9	4	9
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2,580	3,953	3,119	2,940
Net realized/unrealized gains (losses) included in principal transactions	34	(153)	290	323
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	391	531	1,166	1,484
Transfers out of Level 3, assets	(397)	(764)	(1,660)	(1,493)
Purchases, assets	601	1,449	2,235	3,265
Issuance, assets	10	0	16	0
Sales, assets	(962)	(1,461)	(2,888)	(2,964)
Settlements, assets	(6)	0	(27)	0
Balance at end of period, asset	2,251	3,555	2,251	3,555
Unrealized gains (losses) still held, assets	32	(349)	34	(343)
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	948	986	899	911
Net realized/unrealized gains (losses) included in principal transactions	16	(30)	(9)	(56)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	160	183	536	533
Transfers out of Level 3, assets	(235)	(183)	(667)	(542)
Purchases, assets	173	170	848	690
Issuance, assets	0	0	0	0
Sales, assets	(174)	(218)	(719)	(628)
Settlements, assets	0	0	0	0
Balance at end of period, asset	888	908	888	908
Unrealized gains (losses) still held, assets	13	(25)	(13)	(70)
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	691	659	581	600
Net realized/unrealized gains (losses) included in principal transactions	22	(21)	(17)	(31)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	139	93	423	278
Transfers out of Level 3, assets	(160)	(155)	(445)	(421)
Purchases, assets	124	92	557	462
Issuance, assets	0	0	0	0
Sales, assets	(85)	(130)	(368)	(350)
Settlements, assets	0	0	0	0
Balance at end of period, asset	731	538	731	538
Unrealized gains (losses) still held, assets	15	(14)	(6)	(34)
Trading non-derivative assets | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	91	145	116	166
Net realized/unrealized gains (losses) included in principal transactions	(6)	(1)	(9)	(2)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	10	31	63	92
Transfers out of Level 3, assets	(18)	(3)	(76)	(65)
Purchases, assets	28	52	139	152
Issuance, assets	0	0	0	0
Sales, assets	(34)	(59)	(162)	(178)
Settlements, assets	0	0	0	0
Balance at end of period, asset	71	165	71	165
Unrealized gains (losses) still held, assets	(1)	(3)	(3)	(17)
Trading non-derivative assets | Commercial Mortgage-Backed Securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	166	182	202	145
Net realized/unrealized gains (losses) included in principal transactions	0	(8)	17	(23)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	11	59	50	163
Transfers out of Level 3, assets	(57)	(25)	(146)	(56)
Purchases, assets	21	26	152	76
Issuance, assets	0	0	0	0
Sales, assets	(55)	(29)	(189)	(100)
Settlements, assets	0	0	0	0
Balance at end of period, asset	86	205	86	205
Unrealized gains (losses) still held, assets	(1)	(8)	(4)	(19)
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	7	1
Net realized/unrealized gains (losses) included in principal transactions	0	0	4	(1)
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	(1)	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	0	0	(10)	0
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	1	3	3	7
Net realized/unrealized gains (losses) included in principal transactions	0	0	0	(3)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	20	0	20	19
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	(2)	(20)
Settlements, assets	0	0	0	0
Balance at end of period, asset	21	3	21	3
Unrealized gains (losses) still held, assets	0	0	0	(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	45	81	54	119
Net realized/unrealized gains (losses) included in principal transactions	(3)	(23)	(3)	(17)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	2	0	14	8
Transfers out of Level 3, assets	0	(31)	(49)	(58)
Purchases, assets	23	70	186	131
Issuance, assets	0	0	0	0
Sales, assets	(36)	(28)	(171)	(114)
Settlements, assets	0	0	0	0
Balance at end of period, asset	31	69	31	69
Unrealized gains (losses) still held, assets	(1)	19	0	22
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	315	581	500	394
Net realized/unrealized gains (losses) included in principal transactions	15	224	154	300
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	61	38	136	248
Transfers out of Level 3, assets	(37)	(303)	(425)	(481)
Purchases, assets	120	624	485	976
Issuance, assets	0	0	0	0
Sales, assets	(214)	(400)	(582)	(673)
Settlements, assets	0	0	(8)	0
Balance at end of period, asset	260	764	260	764
Unrealized gains (losses) still held, assets	13	(232)	23	(185)
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	244	285	292	192
Net realized/unrealized gains (losses) included in principal transactions	7	2	(2)	11
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	100	16	230	42
Transfers out of Level 3, assets	(15)	(10)	(64)	(18)
Purchases, assets	77	28	137	125
Issuance, assets	0	0	0	0
Sales, assets	(127)	(58)	(307)	(89)
Settlements, assets	0	0	0	0
Balance at end of period, asset	286	263	286	263
Unrealized gains (losses) still held, assets	7	1	(12)	10
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	244	539	531	668
Net realized/unrealized gains (losses) included in principal transactions	(6)	6	(24)	20
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	21	15	51	94
Transfers out of Level 3, assets	(13)	(39)	(191)	(120)
Purchases, assets	53	297	229	615
Issuance, assets	0	0	0	0
Sales, assets	(84)	(243)	(381)	(702)
Settlements, assets	0	0	0	0
Balance at end of period, asset	215	575	215	575
Unrealized gains (losses) still held, assets	0	2	(5)	4
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	783	1,478	833	648
Net realized/unrealized gains (losses) included in principal transactions	5	(332)	170	69
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	27	279	179	540
Transfers out of Level 3, assets	(97)	(198)	(263)	(274)
Purchases, assets	155	260	350	728
Issuance, assets	10	0	16	0
Sales, assets	(327)	(514)	(726)	(738)
Settlements, assets	(6)	0	(9)	0
Balance at end of period, asset	550	973	550	973
Unrealized gains (losses) still held, assets	0	(114)	41	(123)
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,133	1,764	1,799	2,049
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	20	(24)	(58)	(27)
Transfers into Level 3	21	39	70	67
Transfers out of Level 3, assets	(15)	(240)	(564)	(401)
Purchases, assets	174	184	324	922
Issuance, assets	0	0	0	0
Sales, assets	(43)	(200)	(281)	(1,087)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1,290	1,523	1,290	1,523
Unrealized gains (losses) still held, assets	21	(34)	5	(35)
Investments | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	53	57	191	71
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	6	(1)	3	(2)
Transfers into Level 3	0	0	1	0
Transfers out of Level 3, assets	0	(3)	(90)	(3)
Purchases, assets	4	0	7	4
Issuance, assets	0	0	0	0
Sales, assets	(4)	0	(53)	(17)
Settlements, assets	0	0	0	0
Balance at end of period, asset	59	53	59	53
Unrealized gains (losses) still held, assets	5	(1)	4	(4)
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	28	32	75	30
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	4	0	3	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	(3)	0	(3)
Purchases, assets	4	0	7	4
Issuance, assets	0	0	0	0
Sales, assets	(4)	0	(53)	(1)
Settlements, assets	0	0	0	0
Balance at end of period, asset	32	29	32	29
Unrealized gains (losses) still held, assets	4	0	4	(3)
Investments | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	25	25	116	41
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	(1)	0	(1)
Transfers into Level 3	0	0	1	0
Transfers out of Level 3, assets	0	0	(90)	0
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	(16)
Settlements, assets	0	0	0	0
Balance at end of period, asset	27	24	27	24
Unrealized gains (losses) still held, assets	1	(1)	0	(1)
Investments | Commercial Mortgage-Backed 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
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	0	21	0	0
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	(1)	0	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	51
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	(30)
Settlements, assets	0	0	0	0
Balance at end of period, asset	0	20	0	20
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	439	507	542	586
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	6	(29)	(25)	(20)
Transfers into Level 3	0	1	0	2
Transfers out of Level 3, assets	(1)	0	(7)	(77)
Purchases, assets	0	45	0	46
Issuance, assets	0	0	0	0
Sales, assets	(8)	(31)	(74)	(44)
Settlements, assets	0	0	0	0
Balance at end of period, asset	436	493	436	493
Unrealized gains (losses) still held, assets	6	(29)	(7)	(23)
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	14	414	194	608
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)	(12)	(14)	(7)
Transfers into Level 3	0	2	6	27
Transfers out of Level 3, assets	0	(179)	(174)	(197)
Purchases, assets	0	124	36	647
Issuance, assets	0	0	0	0
Sales, assets	0	(153)	(36)	(882)
Settlements, assets	0	0	0	0
Balance at end of period, asset	12	196	12	196
Unrealized gains (losses) still held, assets	0	1	0	1
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	112	290	362	343
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	(9)	(1)
Transfers into Level 3	21	0	63	0
Transfers out of Level 3, assets	(14)	0	(293)	(61)
Purchases, assets	60	15	111	96
Issuance, assets	0	0	0	0
Sales, assets	(27)	(16)	(84)	(88)
Settlements, assets	0	0	0	0
Balance at end of period, asset	150	289	150	289
Unrealized gains (losses) still held, assets	0	0	(2)	(4)
Investments | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	10	13	27	10
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)	(17)	1
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	10	11	10	11
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	0	1	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	0	(1)	0	(1)
Transfers into Level 3	0	30	0	30
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	3	0	3	0
Issuance, assets	0	0	0	0
Sales, assets	(3)	0	(3)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	0	30	0	30
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	0	57	0	0
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	1	0	1
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	(58)	0	(63)
Purchases, assets	0	0	0	62
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	0	0	0	0
Unrealized gains (losses) still held, assets	0	0	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	505	404	483	430
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	21	4	3
Transfers into Level 3	0	6	0	8
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	107	0	167	16
Issuance, assets	0	0	0	0
Sales, assets	(1)	0	(31)	(26)
Settlements, assets	0	0	0	0
Balance at end of period, asset	623	431	623	431
Unrealized gains (losses) still held, assets	10	(5)	10	(5)
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	301	241	427	1,361
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	36	15	(16)	(249)
Transfers into Level 3	1	0	664	2
Transfers out of Level 3, assets	(3)	0	(894)	(309)
Purchases, assets	1	0	2	0
Issuance, assets	12	10	244	116
Sales, assets	0	0	0	0
Settlements, assets	(1)	(1)	(80)	(656)
Balance at end of period, asset	347	265	347	265
Unrealized gains (losses) still held, assets	39	(82)	175	(104)
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	709	681	691	665
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	(40)	42	(23)	61
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	32	23	68	54
Sales, assets	0	0	0	0
Settlements, assets	(18)	(17)	(53)	(51)
Balance at end of period, asset	683	729	683	729
Unrealized gains (losses) still held, assets	(40)	41	(16)	62
Other financial assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	21	73	30	57
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	(22)	(1)	(24)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	(2)
Purchases, assets	0	28	5	50
Issuance, assets	24	0	37	0
Sales, assets	(2)	(2)	(4)	(4)
Settlements, assets	(19)	0	(42)	0
Balance at end of period, asset	25	77	25	77
Unrealized gains (losses) still held, assets	$ 0	$ 0	$ (1)	$ 0