FAIR VALUE MEASUREMENT - Level 3 Fair Value Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Trading account assets and liabilities
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset (liability), net	$ 195	$ (1,077)	$ (1,715)	$ (901)
Net realized/unrealized gains (losses) included in principal transactions	(481)	(178)	132	(502)
Other	0	0	0	0
Transfers into Level 3	135	(74)	1,398	(279)
Transfers out of Level 3	(52)	204	(183)	497
Purchases	47	47	141	109
Issuances	0	(69)	56	(116)
Sales	(20)	6	(50)	(30)
Settlements	7	(26)	52	55
Balance at end of period, asset (liability), net	(169)	(1,167)	(169)	(1,167)
Unrealized gains (losses) still held	(515)	(157)	(11)	(770)
Trading account assets and liabilities | 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	1,755	(116)	1	(154)
Net realized/unrealized gains (losses) included in principal transactions	24	(68)	375	(119)
Other	0	0	0	0
Transfers into Level 3	231	(59)	1,614	(74)
Transfers out of Level 3	20	137	(2)	164
Purchases	1	(21)	2	(15)
Issuances	0	19	56	31
Sales	0	8	13	8
Settlements	(63)	(9)	(91)	50
Balance at end of period, asset (liability), net	1,968	(109)	1,968	(109)
Unrealized gains (losses) still held	7	(101)	387	(85)
Trading account assets and liabilities | 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	2	46	(5)	(6)
Net realized/unrealized gains (losses) included in principal transactions	(37)	(109)	(52)	(49)
Other	0	0	0	0
Transfers into Level 3	(8)	15	(33)	0
Transfers out of Level 3	2	9	11	24
Purchases	5	0	49	3
Issuances	0	0	0	0
Sales	(5)	(2)	(13)	(6)
Settlements	15	(56)	17	(63)
Balance at end of period, asset (liability), net	(26)	(97)	(26)	(97)
Unrealized gains (losses) still held	(47)	(124)	104	(165)
Trading account assets and liabilities | 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	(1,836)	(1,345)	(1,596)	(784)
Net realized/unrealized gains (losses) included in principal transactions	(354)	183	(564)	(111)
Other	0	0	0	0
Transfers into Level 3	(104)	(38)	(391)	(192)
Transfers out of Level 3	12	100	236	109
Purchases	21	2	24	1
Issuances	0	(88)	0	(147)
Sales	(5)	(2)	(6)	0
Settlements	31	(6)	62	(70)
Balance at end of period, asset (liability), net	(2,235)	(1,194)	(2,235)	(1,194)
Unrealized gains (losses) still held	(349)	193	(663)	(338)
Trading account assets and liabilities | 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	(542)	304	(59)	(18)
Net realized/unrealized gains (losses) included in principal transactions	253	(243)	(206)	37
Other	0	0	0	0
Transfers into Level 3	(1)	9	37	6
Transfers out of Level 3	(14)	(4)	(70)	6
Purchases	20	66	66	120
Issuances	0	0	0	0
Sales	(10)	(12)	(44)	(46)
Settlements	16	27	(2)	42
Balance at end of period, asset (liability), net	(278)	147	(278)	147
Unrealized gains (losses) still held	241	(135)	(211)	153
Trading account assets and liabilities | 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	816	34	(56)	61
Net realized/unrealized gains (losses) included in principal transactions	(367)	59	579	(260)
Other	0	0	0	0
Transfers into Level 3	17	(1)	171	(19)
Transfers out of Level 3	(72)	(38)	(358)	194
Purchases	0	0	0	0
Issuances	0	0	0	0
Sales	0	14	0	14
Settlements	8	18	66	96
Balance at end of period, asset (liability), net	402	86	402	86
Unrealized gains (losses) still held	(367)	10	372	(335)
Interest-bearing deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	491	1,047	215	495
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	(5)	(39)	(11)	(49)
Transfers into Level 3, liabilities	0	2	278	3
Transfers out of Level 3, liabilities	(151)	(18)	(151)	(22)
Purchases, liability	0	0	0	0
Issuance, liability	30	129	30	803
Sales, liability	0	0	0	0
Settlements, liability	(138)	(17)	(146)	(146)
Balance at end of period, liability	237	1,182	237	1,182
Unrealized gains (losses) still held, liabilities	(27)	(211)	(6)	(182)
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	730	1,041	757	983
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	(42)	27	(38)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	0	2	0	1
Transfers out of Level 3, liabilities	0	0	0	4
Purchases, liability	0	0	0	0
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	1
Settlements, liability	(105)	0	(105)	58
Balance at end of period, liability	625	1,085	625	1,085
Unrealized gains (losses) still held, liabilities	0	(13)	(33)	(24)
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	200	15	48	586
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(28)	(6)	(129)	118
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	43	15	117	16
Transfers out of Level 3, liabilities	(8)	(6)	(18)	(447)
Purchases, liability	0	0	0	0
Issuance, liability	0	0	9	0
Sales, liability	0	0	0	0
Settlements, liability	(159)	(2)	(181)	(9)
Balance at end of period, liability	104	28	104	28
Unrealized gains (losses) still held, liabilities	24	(1)	(7)	0
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	0	0
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0	0	0
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	0
Purchases, liability	0	0	0	0
Issuance, liability	0	0	0	0
Sales, liability	0	0	0	0
Settlements, liability	0	0	0	0
Balance at end of period, liability	0	0	0	0
Unrealized gains (losses) still held, liabilities	0	0	0	0
Short-term borrowings
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	52	170	13	37
Net realized/unrealized gains (losses) included in principal transactions, liabilities	9	2	19	25
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	75	0	86	9
Transfers out of Level 3, liabilities	(6)	(25)	(6)	(31)
Purchases, liability	0	0	0	0
Issuance, liability	23	12	61	165
Sales, liability	0	0	0	0
Settlements, liability	(7)	(1)	(7)	(1)
Balance at end of period, liability	128	154	128	154
Unrealized gains (losses) still held, liabilities	16	(2)	21	(2)
Long-term debt
Fair value, Derivative assets (liabilities) measured on recurring basis, level 3 fair-value category reconciliation
Transfers into Level 3	1,400	700	4,600	1,600
Transfers out of Level 3	(1,300)	(1,400)	(2,800)	(3,000)
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	19,269	13,734	17,169	12,570
Net realized/unrealized gains (losses) included in principal transactions, liabilities	(2,271)	(819)	(320)	(1,226)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	1,438	747	4,623	1,624
Transfers out of Level 3, liabilities	(1,292)	(1,360)	(2,783)	(2,961)
Purchases, liability	0	20	0	20
Issuance, liability	1,469	900	4,809	6,850
Sales, liability	0	(1)	0	(4)
Settlements, liability	(1,522)	79	(2,505)	(4,387)
Balance at end of period, liability	21,633	14,938	21,633	14,938
Unrealized gains (losses) still held, liabilities	(1,303)	(1,023)	(6,945)	(769)
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	0	0	0	0
Net realized/unrealized gains (losses) included in principal transactions, liabilities	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	4	0	4
Transfers into Level 3, liabilities	0	5	0	5
Transfers out of Level 3, liabilities	0	0	0	0
Purchases, liability	0	0	0	0
Issuance, liability	0	0	2	0
Sales, liability	0	0	0	0
Settlements, liability	0	0	(2)	0
Balance at end of period, liability	0	1	0	1
Unrealized gains (losses) still held, liabilities	0	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	300	66	303	115
Net realized/unrealized gains (losses) included in principal transactions	34	5	14	1
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	2	0	5
Transfers out of Level 3, assets	0	0	0	(4)
Purchases, assets	42	49	108	94
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(50)	0	(99)	(89)
Balance at end of period, asset	326	122	326	122
Unrealized gains (losses) still held, assets	36	0	39	3
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	3,319	3,544	2,455	3,548
Net realized/unrealized gains (losses) included in principal transactions	167	353	327	413
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	779	68	1,181	126
Transfers out of Level 3, assets	(211)	(200)	(359)	(377)
Purchases, assets	1,060	637	2,333	1,421
Issuance, assets	6	5	14	(24)
Sales, assets	(1,147)	(1,104)	(1,968)	(1,799)
Settlements, assets	(11)	(7)	(21)	(12)
Balance at end of period, asset	3,962	3,296	3,962	3,296
Unrealized gains (losses) still held, assets	49	57	(303)	69
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	85	154	10	156
Net realized/unrealized gains (losses) included in principal transactions	1	6	(74)	6
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	4	1	16	1
Transfers out of Level 3, assets	(6)	(2)	(9)	(27)
Purchases, assets	67	42	208	90
Issuance, assets	0	(1)	0	(1)
Sales, assets	(55)	(13)	(55)	(38)
Settlements, assets	0	0	0	0
Balance at end of period, asset	96	187	96	187
Unrealized gains (losses) still held, assets	4	4	5	7
Trading non-derivative assets | Residential mortgages
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	304	128	123	268
Net realized/unrealized gains (losses) included in principal transactions	14	10	6	11
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	144	17	204	22
Transfers out of Level 3, assets	(39)	(9)	(43)	(40)
Purchases, assets	96	61	274	130
Issuance, assets	0	0	0	0
Sales, assets	(86)	(76)	(131)	(260)
Settlements, assets	0	0	0	0
Balance at end of period, asset	433	131	433	131
Unrealized gains (losses) still held, assets	7	15	0	15
Trading non-derivative assets | Commercial and other
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	44	69	61	77
Net realized/unrealized gains (losses) included in principal transactions	4	2	4	4
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	140	3	143	5
Transfers out of Level 3, assets	(14)	(34)	(17)	(35)
Purchases, assets	62	38	89	62
Issuance, assets	0	0	0	0
Sales, assets	(19)	(25)	(63)	(60)
Settlements, assets	0	0	0	0
Balance at end of period, asset	217	53	217	53
Unrealized gains (losses) still held, assets	11	(6)	(10)	(5)
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	433	351	194	501
Net realized/unrealized gains (losses) included in principal transactions	19	18	(64)	21
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	288	21	363	28
Transfers out of Level 3, assets	(59)	(45)	(69)	(102)
Purchases, assets	225	141	571	282
Issuance, assets	0	(1)	0	(1)
Sales, assets	(160)	(114)	(249)	(358)
Settlements, assets	0	0	0	0
Balance at end of period, asset	746	371	746	371
Unrealized gains (losses) still held, assets	22	13	(5)	17
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	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	(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	92	178	64	200
Net realized/unrealized gains (losses) included in principal transactions	0	0	2	(1)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	5	0	15	0
Transfers out of Level 3, assets	(1)	0	(3)	(19)
Purchases, assets	41	0	62	1
Issuance, assets	0	0	0	0
Sales, assets	(20)	(1)	(23)	(4)
Settlements, assets	0	0	0	0
Balance at end of period, asset	117	177	117	177
Unrealized gains (losses) still held, assets	0	0	1	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	39	39	52	31
Net realized/unrealized gains (losses) included in principal transactions	57	2	(28)	1
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	2	0	2	9
Transfers out of Level 3, assets	(2)	0	(2)	0
Purchases, assets	18	0	104	3
Issuance, assets	0	0	0	0
Sales, assets	(88)	(21)	(102)	(24)
Settlements, assets	0	0	0	0
Balance at end of period, asset	26	20	26	20
Unrealized gains (losses) still held, assets	54	1	52	1
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	412	378	313	360
Net realized/unrealized gains (losses) included in principal transactions	(12)	255	290	345
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	64	41	86	62
Transfers out of Level 3, assets	(78)	(5)	(70)	(31)
Purchases, assets	204	109	419	178
Issuance, assets	0	0	0	(33)
Sales, assets	(185)	(322)	(633)	(425)
Settlements, assets	(6)	(2)	(6)	(2)
Balance at end of period, asset	399	454	399	454
Unrealized gains (losses) still held, assets	(71)	55	(87)	34
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	143	127	100	153
Net realized/unrealized gains (losses) included in principal transactions	9	13	9	3
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	10	(2)	38	(1)
Transfers out of Level 3, assets	0	0	(3)	(11)
Purchases, assets	174	48	206	57
Issuance, assets	0	0	0	0
Sales, assets	(244)	(63)	(258)	(78)
Settlements, assets	0	0	0	0
Balance at end of period, asset	92	123	92	123
Unrealized gains (losses) still held, assets	(3)	(28)	(19)	(25)
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	1,561	1,429	1,177	1,484
Net realized/unrealized gains (losses) included in principal transactions	67	20	(102)	(6)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	257	6	496	13
Transfers out of Level 3, assets	(56)	(15)	(60)	(47)
Purchases, assets	272	242	740	463
Issuance, assets	0	0	0	0
Sales, assets	(316)	(271)	(466)	(496)
Settlements, assets	0	0	0	0
Balance at end of period, asset	1,785	1,411	1,785	1,411
Unrealized gains (losses) still held, assets	46	10	(222)	57
Trading non-derivative assets | Other
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	639	1,042	555	818
Net realized/unrealized gains (losses) included in principal transactions	27	45	220	50
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	153	2	181	15
Transfers out of Level 3, assets	(15)	(135)	(152)	(167)
Purchases, assets	126	97	231	437
Issuance, assets	6	6	14	10
Sales, assets	(134)	(312)	(237)	(414)
Settlements, assets	(5)	(5)	(15)	(9)
Balance at end of period, asset	797	740	797	740
Unrealized gains (losses) still held, assets	1	6	(23)	(15)
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,567	2,384	1,259	1,737
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	41	54	(55)	122
Transfers into Level 3	174	18	388	115
Transfers out of Level 3, assets	(347)	(585)	(346)	(679)
Purchases, assets	169	256	468	1,034
Issuance, assets	0	0	0	0
Sales, assets	(63)	(430)	(163)	(611)
Settlements, assets	(45)	0	(55)	(21)
Balance at end of period, asset	1,496	1,697	1,496	1,697
Unrealized gains (losses) still held, assets	16	45	49	76
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	47	32	32	32
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	(19)	(1)	(5)	(1)
Transfers into Level 3	1	0	1	0
Transfers out of Level 3, assets	0	0	1	0
Purchases, assets	1	0	1	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	30	31	30	31
Unrealized gains (losses) still held, assets	(36)	(1)	(23)	(3)
Investments | Residential mortgages
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	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	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	0	0	0
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | Commercial and other
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	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	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	0	0	0
Unrealized gains (losses) still held, assets	0	0	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	47	32	32	32
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	(19)	(1)	(5)	(1)
Transfers into Level 3	1	0	1	0
Transfers out of Level 3, assets	0	0	1	0
Purchases, assets	1	0	1	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	30	31	30	31
Unrealized gains (losses) still held, assets	(36)	(1)	(23)	(3)
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	0	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	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	0	0	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	687	910	623	708
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	42	(7)	94
Transfers into Level 3	172	11	310	14
Transfers out of Level 3, assets	(131)	0	(131)	0
Purchases, assets	95	236	95	421
Issuance, assets	0	0	0	0
Sales, assets	(22)	(173)	(65)	(211)
Settlements, assets	0	0	0	0
Balance at end of period, asset	825	1,026	825	1,026
Unrealized gains (losses) still held, assets	21	48	25	84
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	225	71	96	68
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	5	5	1
Transfers into Level 3	0	0	27	0
Transfers out of Level 3, assets	(64)	0	(64)	0
Purchases, assets	61	17	208	56
Issuance, assets	0	0	0	0
Sales, assets	(33)	(16)	(76)	(48)
Settlements, assets	0	0	0	0
Balance at end of period, asset	196	77	196	77
Unrealized gains (losses) still held, assets	6	1	(9)	1
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	238	60	45	156
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	10	0	2	0
Transfers into Level 3	0	0	49	0
Transfers out of Level 3, assets	(152)	0	(152)	(94)
Purchases, assets	10	0	162	0
Issuance, assets	0	0	0	0
Sales, assets	0	(4)	0	(6)
Settlements, assets	0	0	0	0
Balance at end of period, asset	106	56	106	56
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | Marketable equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	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	1	0	1	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	1	0	1	0
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	16	806	22	187
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)	10	3	8
Transfers into Level 3	0	1	0	95
Transfers out of Level 3, assets	0	(585)	0	(585)
Purchases, assets	0	0	0	550
Issuance, assets	0	0	0	0
Sales, assets	(8)	(173)	(19)	(196)
Settlements, assets	0	0	0	0
Balance at end of period, asset	6	59	6	59
Unrealized gains (losses) still held, assets	0	9	34	9
Investments | Other
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	0	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	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	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	354	505	441	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	21	(2)	(53)	20
Transfers into Level 3	0	6	0	6
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	2	3	2	7
Issuance, assets	0	0	0	0
Sales, assets	0	(64)	(3)	(150)
Settlements, assets	(45)	0	(55)	(21)
Balance at end of period, asset	332	448	332	448
Unrealized gains (losses) still held, assets	25	(12)	22	(15)
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	537	373	402	277
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	447	63	368	108
Transfers into Level 3	0	3	217	128
Transfers out of Level 3, assets	(5)	0	(6)	(70)
Purchases, assets	0	5	0	11
Issuance, assets	0	0	0	0
Sales, assets	0	(25)	0	(35)
Settlements, assets	(1)	0	(3)	0
Balance at end of period, asset	978	419	978	419
Unrealized gains (losses) still held, assets	355	174	509	294
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	367	551	495	584
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	(26)	(37)	(169)	(64)
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	24	16	56	28
Sales, assets	0	0	0	0
Settlements, assets	(20)	(22)	(37)	(40)
Balance at end of period, asset	345	508	345	508
Unrealized gains (losses) still held, assets	(14)	(34)	(147)	(60)
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	0	0	1	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	14	9	14	25
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	4	0	4
Purchases, assets	0	0	0	0
Issuance, assets	(6)	(3)	(6)	(5)
Sales, assets	(4)	(4)	(5)	(8)
Settlements, assets	(4)	(6)	(4)	(16)
Balance at end of period, asset	0	0	0	0
Unrealized gains (losses) still held, assets	$ 2	$ 0	$ 16	$ 0