FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 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	$ (1,037)	$ (703)	$ (578)	$ (112)
Net realized/unrealized gains (losses) included in principal transactions	(1,499)	2,606	(2,304)	4,326
Other	0	0	0	0
Transfers into Level 3	(8)	(56)	6	(585)
Transfers out of Level 3	(94)	(170)	571	(1,162)
Purchases	12	367	(220)	709
Issuances	0	26	0	26
Sales	(59)	(742)	(124)	(1,076)
Settlements	35	(486)	(1)	(1,284)
Balance at end of period, asset (liability), net	(2,650)	842	(2,650)	842
Unrealized gains (losses) still held	(1,739)	2,001	(2,191)	2,834
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	260	779	355	1,726
Net realized/unrealized gains (losses) included in principal transactions	(1,550)	434	(1,689)	600
Other	0	0	0	0
Transfers into Level 3	(167)	141	(202)	73
Transfers out of Level 3	(669)	(272)	(659)	(803)
Purchases	(17)	7	(13)	9
Issuances	0	6	0	6
Sales	13	(6)	13	(6)
Settlements	168	(208)	233	(724)
Balance at end of period, asset (liability), net	(1,962)	881	(1,962)	881
Unrealized gains (losses) still held	(1,486)	473	(1,713)	650
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	76	(131)	50	(89)
Net realized/unrealized gains (losses) included in principal transactions	503	769	546	1,164
Other	0	0	0	0
Transfers into Level 3	121	34	104	(475)
Transfers out of Level 3	50	(50)	48	(6)
Purchases	27	73	102	175
Issuances	0	20	0	20
Sales	(42)	(547)	(81)	(611)
Settlements	(35)	(12)	(69)	(22)
Balance at end of period, asset (liability), net	700	156	700	156
Unrealized gains (losses) still held	438	126	497	235
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	(1,582)	(1,564)	(1,104)	(2,140)
Net realized/unrealized gains (losses) included in principal transactions	(486)	1,189	(878)	1,997
Other	0	0	0	0
Transfers into Level 3	(16)	(60)	(67)	(73)
Transfers out of Level 3	572	232	806	207
Purchases	(7)	220	(253)	405
Issuances	0	0	0	0
Sales	(21)	(91)	(44)	(316)
Settlements	(23)	(27)	(23)	(181)
Balance at end of period, asset (liability), net	(1,563)	(101)	(1,563)	(101)
Unrealized gains (losses) still held	(494)	1,182	(624)	1,634
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	230	217	278	422
Net realized/unrealized gains (losses) included in principal transactions	188	208	(137)	622
Other	0	0	0	0
Transfers into Level 3	74	(74)	174	(45)
Transfers out of Level 3	(83)	84	240	(409)
Purchases	9	67	(58)	120
Issuances	0	0	0	0
Sales	(9)	(98)	(12)	(142)
Settlements	(79)	(149)	(155)	(313)
Balance at end of period, asset (liability), net	330	255	330	255
Unrealized gains (losses) still held	18	246	(148)	410
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	(21)	(4)	(157)	(31)
Net realized/unrealized gains (losses) included in principal transactions	(154)	6	(146)	(57)
Other	0	0	0	0
Transfers into Level 3	(20)	(97)	(3)	(65)
Transfers out of Level 3	36	(164)	136	(151)
Purchases	0	0	2	0
Issuances	0	0	0	0
Sales	0	0	0	(1)
Settlements	4	(90)	13	(44)
Balance at end of period, asset (liability), net	(155)	(349)	(155)	(349)
Unrealized gains (losses) still held	(215)	(26)	(203)	(95)
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	20
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	(1)
Transfers into Level 3, liabilities	0
Transfers out of Level 3, liabilities	(1)
Purchases, liability	0
Issuance, liability	3
Sales, liability	0
Settlements, liability	0
Balance at end of period, liability	23		23
Unrealized gains (losses) still held, liabilities	(1)
Interest-bearing deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	16	191	15	183
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(7)	0	(7)	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	7	(2)	3
Transfers into Level 3, liabilities	0	0	0	7
Transfers out of Level 3, liabilities	0	(122)	(1)	(122)
Purchases, liability	0	0	0	0
Issuance, liability	13	17	13	18
Sales, liability	0	0	0	0
Settlements, liability	(10)	(61)	(10)	(65)
Balance at end of period, liability	26	18	26	18
Unrealized gains (losses) still held, liabilities	(7)	0	(7)	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	809	612	1,031	643
Net realized/unrealized gains (losses) included in principal transactions, liabilities	1	24	(6)	50
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	(24)	(3)	(24)	(3)
Purchases, liability	511	16	1,335	16
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	(668)	(8)	(1,721)	(13)
Balance at end of period, liability	627	593	627	593
Unrealized gains (losses) still held, liabilities	1	10	0	28
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	72	38	50	65
Net realized/unrealized gains (losses) included in principal transactions, liabilities	2	(8)	(13)	21
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	5	10	11	35
Transfers out of Level 3, liabilities	(15)	(4)	(31)	(19)
Purchases, liability	33	30	64	83
Issuance, liability	0	0	0	0
Sales, liability	0	1	0	1
Settlements, liability	(31)	(11)	(45)	(72)
Balance at end of period, liability	62	72	62	72
Unrealized gains (losses) still held, liabilities	4	(12)	6	(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	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	281	36	38	105
Net realized/unrealized gains (losses) included in principal transactions, liabilities	13	1	40	89
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	19	12	19	40
Transfers out of Level 3, liabilities	(11)	(12)	(16)	(21)
Purchases, liability	0	0	0	0
Issuance, liability	21	69	297	76
Sales, liability	0	0	0	0
Settlements, liability	(1)	(23)	(2)	(30)
Balance at end of period, liability	296	81	296	81
Unrealized gains (losses) still held, liabilities	(4)	2	(9)	1
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)		(6,100)
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	36,581	27,432	36,117	25,509
Net realized/unrealized gains (losses) included in principal transactions, liabilities	893	4,719	(227)	8,245
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	2,130	3,335	3,228	6,743
Transfers out of Level 3, liabilities	(1,263)	(2,634)	(6,106)	(3,507)
Purchases, liability	0	0	0	0
Issuance, liability	808	6,527	4,344	9,699
Sales, liability	0	0	0	0
Settlements, liability	(159)	(163)	(606)	(421)
Balance at end of period, liability	37,204	29,778	37,204	29,778
Unrealized gains (losses) still held, liabilities	591	4,232	964	(4,197)
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			2	1
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)	0
Purchases, liability			0	0
Issuance, liability			23	0
Sales, liability			0	0
Settlements, liability			0	0
Balance at end of period, liability	23	0	23	0
Unrealized gains (losses) still held, liabilities			(1)	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	153	202	149	231
Net realized/unrealized gains (losses) included in principal transactions	(10)	(12)	3	(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	(2)	0	(2)	0
Purchases, assets	0	36	137	124
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(1)	(43)	(147)	(171)
Balance at end of period, asset	140	183	140	183
Unrealized gains (losses) still held, assets	(8)	(10)	5	(7)
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	3,242	2,940	2,940	2,520
Net realized/unrealized gains (losses) included in principal transactions	377	64	476	118
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	484	1,045	953	1,455
Transfers out of Level 3, assets	(332)	(545)	(729)	(870)
Purchases, assets	963	1,044	1,816	2,361
Issuance, assets	0	6	0	16
Sales, assets	(781)	(1,066)	(1,503)	(2,108)
Settlements, assets	0	(4)	0	(8)
Balance at end of period, asset	3,953	3,484	3,953	3,484
Unrealized gains (losses) still held, assets	431	2	518	(43)
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	658	498	600	496
Net realized/unrealized gains (losses) included in principal transactions	(32)	(15)	(10)	(13)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	93	80	185	127
Transfers out of Level 3, assets	(124)	(89)	(266)	(158)
Purchases, assets	147	318	370	484
Issuance, assets	0	0	0	0
Sales, assets	(83)	(84)	(220)	(228)
Settlements, assets	0	0	0	0
Balance at end of period, asset	659	708	659	708
Unrealized gains (losses) still held, assets	(24)	(19)	(35)	(21)
Trading non-derivative assets | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	162	118	166	104
Net realized/unrealized gains (losses) included in principal transactions	(2)	0	(1)	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	35	28	61	61
Transfers out of Level 3, assets	(43)	(11)	(62)	(32)
Purchases, assets	39	47	100	85
Issuance, assets	0	0	0	0
Sales, assets	(46)	(29)	(119)	(65)
Settlements, assets	0	0	0	0
Balance at end of period, asset	145	153	145	153
Unrealized gains (losses) still held, assets	(3)	(4)	(13)	(5)
Trading non-derivative assets | Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	163	52	145	81
Net realized/unrealized gains (losses) included in principal transactions	(10)	(3)	(15)	(5)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	48	96	104	97
Transfers out of Level 3, assets	(18)	(8)	(31)	(34)
Purchases, assets	31	4	50	9
Issuance, assets	0	0	0	0
Sales, assets	(32)	(3)	(71)	(10)
Settlements, assets	0	0	0	0
Balance at end of period, asset	182	138	182	138
Unrealized gains (losses) still held, assets	(7)	(3)	(13)	(2)
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	983	668	911	681
Net realized/unrealized gains (losses) included in principal transactions	(44)	(18)	(26)	(18)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	176	204	350	285
Transfers out of Level 3, assets	(185)	(108)	(359)	(224)
Purchases, assets	217	369	520	578
Issuance, assets	0	0	0	0
Sales, assets	(161)	(116)	(410)	(303)
Settlements, assets	0	0	0	0
Balance at end of period, asset	986	999	986	999
Unrealized gains (losses) still held, assets	(34)	(26)	(61)	(28)
Trading non-derivative assets | U.S. Treasury and federal agency securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1	2	1	4
Net realized/unrealized gains (losses) included in principal transactions	(1)	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	(1)	0	(1)
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
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	23	6	7	37
Net realized/unrealized gains (losses) included in principal transactions	(1)	4	(3)	5
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	71	19	71
Transfers out of Level 3, assets	0	0	0	(20)
Purchases, assets	0	0	0	1
Issuance, assets	0	0	0	0
Sales, assets	(19)	(1)	(20)	(14)
Settlements, assets	0	0	0	0
Balance at end of period, asset	3	80	3	80
Unrealized gains (losses) still held, assets	0	(3)	0	(5)
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	53	94	119	23
Net realized/unrealized gains (losses) included in principal transactions	(1)	(27)	6	(26)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	8	249	8	299
Transfers out of Level 3, assets	(2)	(1)	(27)	(1)
Purchases, assets	49	57	61	87
Issuance, assets	0	0	0	0
Sales, assets	(26)	(8)	(86)	(18)
Settlements, assets	0	0	0	0
Balance at end of period, asset	81	364	81	364
Unrealized gains (losses) still held, assets	(1)	(12)	5	(18)
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	296	1,013	394	412
Net realized/unrealized gains (losses) included in principal transactions	46	59	76	68
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	196	120	210	262
Transfers out of Level 3, assets	(51)	(244)	(178)	(278)
Purchases, assets	256	181	352	828
Issuance, assets	0	0	0	0
Sales, assets	(162)	(592)	(273)	(755)
Settlements, assets	0	0	0	0
Balance at end of period, asset	581	537	581	537
Unrealized gains (losses) still held, assets	88	38	153	18
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	225	199	192	174
Net realized/unrealized gains (losses) included in principal transactions	6	(9)	9	(14)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	14	14	26	63
Transfers out of Level 3, assets	(2)	(61)	(8)	(87)
Purchases, assets	66	58	97	108
Issuance, assets	0	0	0	0
Sales, assets	(24)	(68)	(31)	(111)
Settlements, assets	0	0	0	0
Balance at end of period, asset	285	133	285	133
Unrealized gains (losses) still held, assets	5	(23)	10	(40)
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	567	466	668	613
Net realized/unrealized gains (losses) included in principal transactions	(1)	(24)	14	(19)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	74	82	79	140
Transfers out of Level 3, assets	(18)	(100)	(81)	(167)
Purchases, assets	197	262	318	393
Issuance, assets	0	0	0	0
Sales, assets	(280)	(132)	(459)	(406)
Settlements, assets	0	0	0	0
Balance at end of period, asset	539	554	539	554
Unrealized gains (losses) still held, assets	(5)	(26)	0	(45)
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	1,094	492	648	576
Net realized/unrealized gains (losses) included in principal transactions	373	79	401	126
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	16	305	261	333
Transfers out of Level 3, assets	(74)	(30)	(76)	(92)
Purchases, assets	178	117	468	366
Issuance, assets	0	6	0	16
Sales, assets	(109)	(149)	(224)	(501)
Settlements, assets	0	(4)	0	(8)
Balance at end of period, asset	1,478	816	1,478	816
Unrealized gains (losses) still held, assets	378	54	411	75
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,893	2,378	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	(16)	(64)	(3)	(147)
Transfers into Level 3	15	100	28	415
Transfers out of Level 3, assets	(24)	(195)	(161)	(304)
Purchases, assets	457	223	738	410
Issuance, assets	0	0	0	0
Sales, assets	(561)	(179)	(887)	(338)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1,764	2,263	1,764	2,263
Unrealized gains (losses) still held, assets	(8)	(45)	10	(85)
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	46	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	1	(2)	(1)	(9)
Transfers into Level 3	0	0	0	1
Transfers out of Level 3, assets	0	(10)	0	(10)
Purchases, assets	4	0	4	4
Issuance, assets	0	0	0	0
Sales, assets	(1)	(6)	(1)	(9)
Settlements, assets	0	0	0	0
Balance at end of period, asset	32	28	32	28
Unrealized gains (losses) still held, assets	(1)	(2)	(4)	(4)
Investments | Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	25	44	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	0	(4)	0	(6)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	(39)
Purchases, assets	0	0	0	0
Issuance, assets	0	0	0	0
Sales, assets	0	0	(16)	(9)
Settlements, assets	0	0	0	0
Balance at end of period, asset	25	40	25	40
Unrealized gains (losses) still held, assets	0	(4)	0	(5)
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	53	90	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)	(1)	(15)
Transfers into Level 3	0	0	0	1
Transfers out of Level 3, assets	0	(10)	0	(49)
Purchases, assets	4	0	4	4
Issuance, assets	0	0	0	0
Sales, assets	(1)	(6)	(17)	(18)
Settlements, assets	0	0	0	0
Balance at end of period, asset	57	68	57	68
Unrealized gains (losses) still held, assets	(1)	(6)	(4)	(9)
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	51	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	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	(30)	0	(30)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	21	0	21	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	521	705	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	(8)	(34)	9	(78)
Transfers into Level 3	0	0	1	0
Transfers out of Level 3, assets	(2)	(131)	(77)	(142)
Purchases, assets	0	1	1	1
Issuance, assets	0	0	0	0
Sales, assets	(4)	(2)	(13)	(14)
Settlements, assets	0	0	0	0
Balance at end of period, asset	507	539	507	539
Unrealized gains (losses) still held, assets	(8)	(14)	5	(47)
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	551	1,029	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	7	(15)	5	(39)
Transfers into Level 3	15	0	25	250
Transfers out of Level 3, assets	(17)	(54)	(18)	(113)
Purchases, assets	363	202	523	385
Issuance, assets	0	0	0	0
Sales, assets	(505)	(161)	(729)	(268)
Settlements, assets	0	0	0	0
Balance at end of period, asset	414	1,001	414	1,001
Unrealized gains (losses) still held, assets	7	(16)	8	(19)
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	291	237	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	(4)	(3)	(1)	(7)
Transfers into Level 3	0	100	0	153
Transfers out of Level 3, assets	0	0	(61)	0
Purchases, assets	23	0	81	0
Issuance, assets	0	0	0	0
Sales, assets	(20)	0	(72)	0
Settlements, assets	0	0	0	0
Balance at end of period, asset	290	334	290	334
Unrealized gains (losses) still held, assets	(4)	(1)	(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	12	16	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	1	(6)	3	(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	13	10	13	10
Unrealized gains (losses) still held, assets	(7)	(7)	0	(7)
Investments | Asset-backed securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1	2	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	0	(1)	0	11
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	(13)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1	1	1	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	4		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		0
Transfers into Level 3	0		0
Transfers out of Level 3, assets	(5)		(5)
Purchases, assets	57		62
Issuance, assets	0		0
Sales, assets	0		0
Settlements, assets	0		0
Balance at end of period, asset	57		57
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	409	298	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	(14)	2	(18)	(12)
Transfers into Level 3	0	0	2	11
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	10	20	16	20
Issuance, assets	0	0	0	0
Sales, assets	(1)	(10)	(26)	(25)
Settlements, assets	0	0	0	0
Balance at end of period, asset	404	310	404	310
Unrealized gains (losses) still held, assets	5	(1)	5	(1)
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	640	622	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	(281)	(105)	(264)	(190)
Transfers into Level 3	2	1	2	1
Transfers out of Level 3, assets	(119)	(193)	(309)	(195)
Purchases, assets	0	0	0	0
Issuance, assets	0	1	106	1
Sales, assets	0	0	0	0
Settlements, assets	(1)	(1)	(655)	(3)
Balance at end of period, asset	241	325	241	325
Unrealized gains (losses) still held, assets	(146)	(7)	(133)	166
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	658	520	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	21	59	18	158
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	35	31	69
Sales, assets	0	0	0	0
Settlements, assets	(17)	(14)	(33)	(31)
Balance at end of period, asset	681	600	681	600
Unrealized gains (losses) still held, assets	22	59	20	157
Other financial assets measured on a recurring basis
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	52	68	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	1	4	(2)	7
Transfers into Level 3	0	7	0	7
Transfers out of Level 3, assets	(1)	(12)	(2)	(16)
Purchases, assets	21	13	22	14
Issuance, assets	0	15	0	40
Sales, assets	0	0	(2)	(1)
Settlements, assets	0	(32)	0	(61)
Balance at end of period, asset	73	63	73	63
Unrealized gains (losses) still held, assets	$ 0	$ 7	$ 0	$ 48