FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 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	$ (2,944)	$ (1,037)	$ (2,218)	$ (578)
Net realized/unrealized gains (losses) included in principal transactions	598	(1,499)	(141)	(2,304)
Other	0	0	0	0
Transfers into Level 3	214	(8)	131	6
Transfers out of Level 3	321	(94)	561	571
Purchases	(118)	12	(492)	(220)
Issuances	8	0	14	0
Sales	(224)	(59)	(255)	(124)
Settlements	96	35	351	(1)
Balance at end of period, asset (liability), net	(2,049)	(2,650)	(2,049)	(2,650)
Unrealized gains (losses) still held	454	(1,739)	(124)	(2,191)
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	(1,362)	260	(1,085)	355
Net realized/unrealized gains (losses) included in principal transactions	(198)	(1,550)	(683)	(1,689)
Other	0	0	0	0
Transfers into Level 3	99	(167)	130	(202)
Transfers out of Level 3	12	(669)	(17)	(659)
Purchases	107	(17)	80	(13)
Issuances	8	0	14	0
Sales	(20)	13	(17)	13
Settlements	326	168	550	233
Balance at end of period, asset (liability), net	(1,028)	(1,962)	(1,028)	(1,962)
Unrealized gains (losses) still held	(293)	(1,486)	(810)	(1,713)
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	335	76	295	50
Net realized/unrealized gains (losses) included in principal transactions	553	503	507	546
Other	0	0	0	0
Transfers into Level 3	36	121	38	104
Transfers out of Level 3	(20)	50	73	48
Purchases	22	27	(73)	102
Issuances	0	0	0	0
Sales	(144)	(42)	(166)	(81)
Settlements	(231)	(35)	(123)	(69)
Balance at end of period, asset (liability), net	551	700	551	700
Unrealized gains (losses) still held	507	438	414	497
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	(2,222)	(1,582)	(1,634)	(1,104)
Net realized/unrealized gains (losses) included in principal transactions	123	(486)	(226)	(878)
Other	0	0	0	0
Transfers into Level 3	73	(16)	(71)	(67)
Transfers out of Level 3	324	572	537	806
Purchases	(298)	(7)	(568)	(253)
Issuances	0	0	0	0
Sales	(54)	(21)	(55)	(44)
Settlements	4	(23)	(33)	(23)
Balance at end of period, asset (liability), net	(2,050)	(1,563)	(2,050)	(1,563)
Unrealized gains (losses) still held	141	(494)	35	(624)
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	342	230	279	278
Net realized/unrealized gains (losses) included in principal transactions	79	188	161	(137)
Other	0	0	0	0
Transfers into Level 3	1	74	32	174
Transfers out of Level 3	(6)	(83)	(12)	240
Purchases	1	9	11	(58)
Issuances	0	0	0	0
Sales	(6)	(9)	(17)	(12)
Settlements	(7)	(79)	(50)	(155)
Balance at end of period, asset (liability), net	404	330	404	330
Unrealized gains (losses) still held	84	18	288	(148)
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	(37)	(21)	(73)	(157)
Net realized/unrealized gains (losses) included in principal transactions	41	(154)	100	(146)
Other	0	0	0	0
Transfers into Level 3	5	(20)	2	(3)
Transfers out of Level 3	11	36	(20)	136
Purchases	50	0	58	2
Issuances	0	0	0	0
Sales	0	0	0	0
Settlements	4	4	7	13
Balance at end of period, asset (liability), net	74	(155)	74	(155)
Unrealized gains (losses) still held	15	(215)	(51)	(203)
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	2		5
Sales, liability	0		0
Settlements, liability	(2)		(8)
Balance at end of period, liability	3		3
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	72	16	29	15
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	(7)	0	(7)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	1	0	4	(2)
Transfers into Level 3, liabilities	5	0	51	0
Transfers out of Level 3, liabilities	(32)	0	(33)	(1)
Purchases, liability	0	0	0	0
Issuance, liability	10	13	15	13
Sales, liability	0	0	0	0
Settlements, liability	(13)	(10)	(17)	(10)
Balance at end of period, liability	41	26	41	26
Unrealized gains (losses) still held, liabilities	(8)	(7)	(8)	(7)
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	326	809	390	1,031
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	1	0	(6)
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	(24)	0	(24)
Purchases, liability	184	511	438	1,335
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	(224)	(668)	(542)	(1,721)
Balance at end of period, liability	286	627	286	627
Unrealized gains (losses) still held, liabilities	0	1	0	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	105	72	35	50
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(2)	2	(8)	(13)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	13	5	14	11
Transfers out of Level 3, liabilities	(8)	(15)	(10)	(31)
Purchases, liability	9	33	96	64
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	(89)	(31)	(111)	(45)
Balance at end of period, liability	32	62	32	62
Unrealized gains (losses) still held, liabilities	0	4	0	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	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		1		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		3		3
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		4		4
Unrealized gains (losses) still held, liabilities		(1)		0
Short-term borrowings
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	583	281	481	38
Net realized/unrealized gains (losses) included in principal transactions, liabilities	12	13	(82)	40
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	9	19	20	19
Transfers out of Level 3, liabilities	(479)	(11)	(517)	(16)
Purchases, liability	0	0	1	0
Issuance, liability	177	21	211	297
Sales, liability	0	0	0	0
Settlements, liability	(77)	(1)	(77)	(2)
Balance at end of period, liability	201	296	201	296
Unrealized gains (losses) still held, liabilities	0	(4)	(3)	(9)
Long-term debt
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	40,364	36,581	38,380	36,117
Net realized/unrealized gains (losses) included in principal transactions, liabilities	832	893	1,427	(227)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	1,680	2,130	3,038	3,228
Transfers out of Level 3, liabilities	(20,890)	(1,263)	(21,730)	(6,106)
Purchases, liability	0	0	0	0
Issuance, liability	1,192	808	4,782	4,344
Sales, liability	0	0	0	0
Settlements, liability	(1,139)	(159)	(2,668)	(606)
Balance at end of period, liability	20,375	37,204	20,375	37,204
Unrealized gains (losses) still held, liabilities	394	591	819	964
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability		20		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		(1)		1
Transfers into Level 3, liabilities		0		0
Transfers out of Level 3, liabilities		(1)		(1)
Purchases, liability		0		0
Issuance, liability		3		23
Sales, liability		0		0
Settlements, liability		0		0
Balance at end of period, liability		23		23
Unrealized gains (losses) still held, liabilities		(1)		(1)
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	132	153	139	149
Net realized/unrealized gains (losses) included in principal transactions	(3)	(10)	(8)	3
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	(2)	0	(2)
Purchases, assets	21	0	66	137
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(24)	(1)	(71)	(147)
Balance at end of period, asset	126	140	126	140
Unrealized gains (losses) still held, assets	(3)	(8)	(6)	5
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2,792	3,242	3,119	2,940
Net realized/unrealized gains (losses) included in principal transactions	117	377	256	476
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	521	484	775	953
Transfers out of Level 3, assets	(549)	(332)	(1,263)	(729)
Purchases, assets	622	963	1,634	1,816
Issuance, assets	2	0	6	0
Sales, assets	(923)	(781)	(1,926)	(1,503)
Settlements, assets	(2)	0	(21)	0
Balance at end of period, asset	2,580	3,953	2,580	3,953
Unrealized gains (losses) still held, assets	91	431	88	518
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	860	983	899	911
Net realized/unrealized gains (losses) included in principal transactions	1	(44)	(25)	(26)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	248	176	376	350
Transfers out of Level 3, assets	(176)	(185)	(432)	(359)
Purchases, assets	290	217	675	520
Issuance, assets	0	0	0	0
Sales, assets	(275)	(161)	(545)	(410)
Settlements, assets	0	0	0	0
Balance at end of period, asset	948	986	948	986
Unrealized gains (losses) still held, assets	7	(34)	(8)	(61)
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	531	658	581	600
Net realized/unrealized gains (losses) included in principal transactions	0	(32)	(39)	(10)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	205	93	284	185
Transfers out of Level 3, assets	(131)	(124)	(285)	(266)
Purchases, assets	233	147	433	370
Issuance, assets	0	0	0	0
Sales, assets	(147)	(83)	(283)	(220)
Settlements, assets	0	0	0	0
Balance at end of period, asset	691	659	691	659
Unrealized gains (losses) still held, assets	5	(24)	(13)	(35)
Trading non-derivative assets | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	170	162	116	166
Net realized/unrealized gains (losses) included in principal transactions	(2)	(2)	(3)	(1)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	17	35	53	61
Transfers out of Level 3, assets	(23)	(43)	(58)	(62)
Purchases, assets	23	39	111	100
Issuance, assets	0	0	0	0
Sales, assets	(94)	(46)	(128)	(119)
Settlements, assets	0	0	0	0
Balance at end of period, asset	91	145	91	145
Unrealized gains (losses) still held, assets	0	(3)	3	(13)
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	159	163	202	145
Net realized/unrealized gains (losses) included in principal transactions	3	(10)	17	(15)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	26	48	39	104
Transfers out of Level 3, assets	(22)	(18)	(89)	(31)
Purchases, assets	34	31	131	50
Issuance, assets	0	0	0	0
Sales, assets	(34)	(32)	(134)	(71)
Settlements, assets	0	0	0	0
Balance at end of period, asset	166	182	166	182
Unrealized gains (losses) still held, assets	2	(7)	2	(13)
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	7	1
Net realized/unrealized gains (losses) included in principal transactions	0	(1)	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	23	3	7
Net realized/unrealized gains (losses) included in principal transactions	0	(1)	0	(3)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	0	0	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	(19)	(2)	(20)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1	3	1	3
Unrealized gains (losses) still held, assets	0	0	0	0
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	113	53	54	119
Net realized/unrealized gains (losses) included in principal transactions	0	(1)	0	6
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	8	12	8
Transfers out of Level 3, assets	(9)	(2)	(49)	(27)
Purchases, assets	38	49	163	61
Issuance, assets	0	0	0	0
Sales, assets	(97)	(26)	(135)	(86)
Settlements, assets	0	0	0	0
Balance at end of period, asset	45	81	45	81
Unrealized gains (losses) still held, assets	1	(1)	2	5
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	464	296	500	394
Net realized/unrealized gains (losses) included in principal transactions	66	46	139	76
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	62	196	75	210
Transfers out of Level 3, assets	(180)	(51)	(388)	(178)
Purchases, assets	105	256	365	352
Issuance, assets	0	0	0	0
Sales, assets	(202)	(162)	(368)	(273)
Settlements, assets	0	0	(8)	0
Balance at end of period, asset	315	581	315	581
Unrealized gains (losses) still held, assets	65	88	71	153
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	232	225	292	192
Net realized/unrealized gains (losses) included in principal transactions	(27)	6	(9)	9
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	101	14	130	26
Transfers out of Level 3, assets	(26)	(2)	(49)	(8)
Purchases, assets	29	66	60	97
Issuance, assets	0	0	0	0
Sales, assets	(65)	(24)	(180)	(31)
Settlements, assets	0	0	0	0
Balance at end of period, asset	244	285	244	285
Unrealized gains (losses) still held, assets	(22)	5	(20)	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	370	567	531	668
Net realized/unrealized gains (losses) included in principal transactions	(21)	(1)	(18)	14
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	15	74	30	79
Transfers out of Level 3, assets	(60)	(18)	(178)	(81)
Purchases, assets	40	197	176	318
Issuance, assets	0	0	0	0
Sales, assets	(100)	(280)	(297)	(459)
Settlements, assets	0	0	0	0
Balance at end of period, asset	244	539	244	539
Unrealized gains (losses) still held, assets	(4)	(5)	(12)	0
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	752	1,094	833	648
Net realized/unrealized gains (losses) included in principal transactions	98	373	165	401
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	95	16	152	261
Transfers out of Level 3, assets	(98)	(74)	(166)	(76)
Purchases, assets	120	178	195	468
Issuance, assets	2	0	6	0
Sales, assets	(184)	(109)	(399)	(224)
Settlements, assets	(2)	0	(3)	0
Balance at end of period, asset	783	1,478	783	1,478
Unrealized gains (losses) still held, assets	44	378	55	411
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,439	1,893	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	(16)	(16)	(78)	(3)
Transfers into Level 3	13	15	49	28
Transfers out of Level 3, assets	(262)	(24)	(549)	(161)
Purchases, assets	31	457	150	738
Issuance, assets	0	0	0	0
Sales, assets	(72)	(561)	(238)	(887)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1,133	1,764	1,133	1,764
Unrealized gains (losses) still held, assets	4	(8)	(9)	10
Investments | Mortgage-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	52	53	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	1	1	(3)	(1)
Transfers into Level 3	1	0	1	0
Transfers out of Level 3, assets	0	0	(90)	0
Purchases, assets	0	4	3	4
Issuance, assets	0	0	0	0
Sales, assets	(1)	(1)	(49)	(17)
Settlements, assets	0	0	0	0
Balance at end of period, asset	53	57	53	57
Unrealized gains (losses) still held, assets	1	(1)	(3)	(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	27	28	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	2	1	(1)	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	4	3	4
Issuance, assets	0	0	0	0
Sales, assets	(1)	(1)	(49)	(1)
Settlements, assets	0	0	0	0
Balance at end of period, asset	28	32	28	32
Unrealized gains (losses) still held, assets	2	(1)	(1)	(4)
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	(1)	0	(2)	0
Transfers into Level 3	1	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	25	25	25	25
Unrealized gains (losses) still held, assets	(1)	0	(2)	0
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	51	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	0	0	0
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	(30)	0	(30)
Settlements, assets	0	0	0	0
Balance at end of period, asset	0	21	0	21
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	479	521	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	(5)	(8)	(31)	9
Transfers into Level 3	0	0	0	1
Transfers out of Level 3, assets	(5)	(2)	(6)	(77)
Purchases, assets	0	0	0	1
Issuance, assets	0	0	0	0
Sales, assets	(30)	(4)	(66)	(13)
Settlements, assets	0	0	0	0
Balance at end of period, asset	439	507	439	507
Unrealized gains (losses) still held, assets	(4)	(8)	(13)	5
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	24	551	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	(4)	7	(12)	5
Transfers into Level 3	0	15	6	25
Transfers out of Level 3, assets	(6)	(17)	(174)	(18)
Purchases, assets	0	363	36	523
Issuance, assets	0	0	0	0
Sales, assets	0	(505)	(36)	(729)
Settlements, assets	0	0	0	0
Balance at end of period, asset	14	414	14	414
Unrealized gains (losses) still held, assets	(3)	7	(3)	8
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	388	291	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	(7)	(4)	(7)	(1)
Transfers into Level 3	12	0	42	0
Transfers out of Level 3, assets	(251)	0	(279)	(61)
Purchases, assets	10	23	51	81
Issuance, assets	0	0	0	0
Sales, assets	(40)	(20)	(57)	(72)
Settlements, assets	0	0	0	0
Balance at end of period, asset	112	290	112	290
Unrealized gains (losses) still held, assets	10	(4)	10	(4)
Investments | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	8	12	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	2	1	(17)	3
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	13	10	13
Unrealized gains (losses) still held, assets	(1)	(7)	(1)	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	0	0	0
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	0	1	0	1
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	4	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	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	(5)	0	(5)
Purchases, assets	0	57	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	57	0	57
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	488	409	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	(3)	(14)	(8)	(18)
Transfers into Level 3	0	0	0	2
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	21	10	60	16
Issuance, assets	0	0	0	0
Sales, assets	(1)	(1)	(30)	(26)
Settlements, assets	0	0	0	0
Balance at end of period, asset	505	404	505	404
Unrealized gains (losses) still held, assets	1	5	1	5
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,057	640	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	(23)	(281)	(52)	(264)
Transfers into Level 3	0	2	663	2
Transfers out of Level 3, assets	(851)	(119)	(891)	(309)
Purchases, assets	1	0	1	0
Issuance, assets	128	0	232	106
Sales, assets	0	0	0	0
Settlements, assets	(11)	(1)	(79)	(655)
Balance at end of period, asset	301	241	301	241
Unrealized gains (losses) still held, assets	(1)	(146)	16	(133)
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	702	658	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	5	21	17	18
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	19	19	36	31
Sales, assets	0	0	0	0
Settlements, assets	(17)	(17)	(35)	(33)
Balance at end of period, asset	709	681	709	681
Unrealized gains (losses) still held, assets	5	22	23	20
Other financial assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	31	52	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)	1	(2)	(2)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	(1)	0	(2)
Purchases, assets	2	21	5	22
Issuance, assets	0	0	13	0
Sales, assets	(2)	0	(2)	(2)
Settlements, assets	(9)	0	(23)	0
Balance at end of period, asset	21	73	21	73
Unrealized gains (losses) still held, assets	$ 0	$ 0	$ (1)	$ 0