FAIR VALUE MEASUREMENT - Level 3 Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Threshold tenor of repo curves to classify certain reverse repos to Level 3	5 years		5 years
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	$ (2,854)	$ (1,760)	$ (2,661)	$ (991)
Net realized/unrealized gains (losses) included in earnings	(210)	(178)	(1,042)	(224)
Transfers into Level 3	(94)	47	54	(477)
Transfers out of Level 3	(167)	102	14	183
Purchases	156	238	342	408
Sales	8	(96)	(155)	(239)
Settlements	473	190	760	(117)
Balance at end of period, asset (liability), net	(2,688)	(1,457)	(2,688)	(1,457)
Unrealized gains (losses) still held	(514)	(597)	(636)	(639)
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	(334)	233	(211)	839
Net realized/unrealized gains (losses) included in earnings	(358)	(236)	(428)	(584)
Transfers into Level 3	(2)	116	(136)	152
Transfers out of Level 3	(46)	(133)	(39)	(124)
Purchases	12	24	18	42
Sales	169	(52)	166	(98)
Settlements	136	65	207	(210)
Balance at end of period, asset (liability), net	(423)	17	(423)	17
Unrealized gains (losses) still held	(152)	(293)	(58)	(225)
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	646	829	778	695
Net realized/unrealized gains (losses) included in earnings	(123)	(41)	(424)	97
Transfers into Level 3	(42)	32	(1)	21
Transfers out of Level 3	(85)	11	(81)	30
Purchases	83	0	174	1
Sales	(83)	(1)	(178)	(1)
Settlements	(5)	17	123	4
Balance at end of period, asset (liability), net	391	847	391	847
Unrealized gains (losses) still held	(153)	3	(63)	145
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	(774)	(1,236)	(863)	(858)
Net realized/unrealized gains (losses) included in earnings	351	90	322	242
Transfers into Level 3	0	(73)	(23)	(591)
Transfers out of Level 3	15	278	116	330
Purchases	61	112	150	262
Sales	(75)	(43)	(140)	(137)
Settlements	67	(21)	83	(141)
Balance at end of period, asset (liability), net	(355)	(893)	(355)	(893)
Unrealized gains (losses) still held	(70)	(415)	(166)	(431)
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	(1,729)	(1,329)	(1,622)	(1,393)
Net realized/unrealized gains (losses) included in earnings	(56)	173	(390)	248
Transfers into Level 3	1	(5)	183	25
Transfers out of Level 3	(6)	(39)	10	(8)
Purchases	0	0	0	0
Sales	0	0	0	0
Settlements	63	(29)	92	(101)
Balance at end of period, asset (liability), net	(1,727)	(1,229)	(1,727)	(1,229)
Unrealized gains (losses) still held	89	128	(158)	197
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	(663)	(257)	(743)	(274)
Net realized/unrealized gains (losses) included in earnings	(24)	(164)	(122)	(227)
Transfers into Level 3	(51)	(23)	31	(84)
Transfers out of Level 3	(45)	(15)	8	(45)
Purchases	0	102	0	103
Sales	(3)	0	(3)	(3)
Settlements	212	158	255	331
Balance at end of period, asset (liability), net	(574)	(199)	(574)	(199)
Unrealized gains (losses) still held	(228)	(20)	(191)	(325)
Interest-bearing deposits
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	465	935	486	890
Net realized/unrealized gains (losses) included in earnings, liabilities	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	101	(20)	101	(90)
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	(17)	(46)	(38)	(71)
Balance at end of period, liability	347	909	347	909
Unrealized gains (losses) still held, liabilities	(164)	12	(265)	3
Federal funds purchased and securities loaned or sold under agreements to repurchase
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	1,060	940	1,043	902
Net realized/unrealized gains (losses) included in earnings, liabilities	29	(2)	(23)	(9)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	0	54	0	54
Transfers out of Level 3, liabilities	0	0	0	0
Purchases, liability	0	47	0	78
Issuance, liability	0	0	0	0
Sales, liability	(8)	(11)	(7)	(11)
Settlements, liability	(58)	0	(94)	0
Balance at end of period, liability	965	1,032	965	1,032
Unrealized gains (losses) still held, liabilities	25	(8)	15	(21)
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	223	482	424	590
Net realized/unrealized gains (losses) included in earnings, liabilities	(12)	5	(22)	15
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	105	31	197	49
Transfers out of Level 3, liabilities	(144)	(22)	(187)	(51)
Purchases, liability	0	0	0	0
Issuance, liability	0	0	0	0
Sales, liability	87	144	157	294
Settlements, liability	(26)	(158)	(356)	(395)
Balance at end of period, liability	257	472	257	472
Unrealized gains (losses) still held, liabilities	(38)	(9)	(50)	(6)
Short-term borrowings
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	120	27	344	29
Net realized/unrealized gains (losses) included in earnings, liabilities	17	(14)	10	(31)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	0	0	0
Transfers into Level 3, liabilities	16	80	17	80
Transfers out of Level 3, liabilities	(3)	0	(15)	0
Purchases, liability	0	8	0	8
Issuance, liability	33	0	49	1
Sales, liability	0	0	0	0
Settlements, liability	(16)	0	(252)	(20)
Balance at end of period, liability	133	129	133	129
Unrealized gains (losses) still held, liabilities	(1)	(1)	(3)	(6)
Long-term debt
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	7,196	8,646	7,290	7,621
Net realized/unrealized gains (losses) included in earnings, liabilities	82	(97)	368	(381)
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	0	24	0	49
Transfers into Level 3, liabilities	374	654	1,086	1,613
Transfers out of Level 3, liabilities	(1,091)	(1,384)	(2,038)	(2,238)
Purchases, liability	0	0	0	0
Issuance, liability	1,452	1,006	2,401	1,946
Sales, liability	0	0	0	0
Settlements, liability	(184)	(1,148)	(706)	(1,427)
Balance at end of period, liability	7,665	7,847	7,665	7,847
Unrealized gains (losses) still held, liabilities	213	(311)	(17)	(521)
Other financial liabilities
Fair value, liabilities measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, liability	8	3	7	10
Net realized/unrealized gains (losses) included in earnings, liabilities	0	0	0	0
Net realized/unrealized gains (losses) included in locations other than principal transactions, liabilities	(4)	(1)	(7)	(1)
Transfers into Level 3, liabilities	0	4	0	4
Transfers out of Level 3, liabilities	(4)	0	(4)	0
Purchases, liability	(1)	(1)	(2)	(1)
Issuance, liability	2	0	2	1
Sales, liability	0	0	0	(3)
Settlements, liability	(5)	(1)	(6)	(6)
Balance at end of period, liability	4	6	4	6
Unrealized gains (losses) still held, liabilities	(4)	0	(3)	0
Federal funds sold and securities borrowed or purchased under agreements to resell
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	4,022	3,451	3,398	3,566
Net realized/unrealized gains (losses) included in principal transactions	(95)	(78)	(135)	(79)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	16	0	67
Transfers out of Level 3, assets	(2,756)	(8)	(2,856)	(8)
Purchases, assets	20	75	784	75
Issuance, assets	0	0	0	0
Sales, assets	0	0	0	0
Settlements, assets	(121)	(93)	(121)	(258)
Balance at end of period, asset	1,070	3,363	1,070	3,363
Unrealized gains (losses) still held, assets	0	129	0	153
Trading non-derivative assets
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	15,220	14,210	15,357	15,260
Net realized/unrealized gains (losses) included in principal transactions	561	424	686	811
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	1,093	1,062	1,973	2,240
Transfers out of Level 3, assets	(2,295)	(1,415)	(3,633)	(2,955)
Purchases, assets	3,784	5,148	7,638	9,588
Issuance, assets	19	4	32	7
Sales, assets	(4,069)	(4,481)	(7,683)	(9,913)
Settlements, assets	(14)	(12)	(71)	(98)
Balance at end of period, asset	14,299	14,940	14,299	14,940
Unrealized gains (losses) still held, assets	250	219	209	518
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	818	788	1,085	1,094
Net realized/unrealized gains (losses) included in principal transactions	26	17	29	98
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	188	198	482	377
Transfers out of Level 3, assets	(340)	(213)	(850)	(598)
Purchases, assets	172	107	339	261
Issuance, assets	0	4	0	7
Sales, assets	(267)	(196)	(488)	(517)
Settlements, assets	14	(8)	14	(25)
Balance at end of period, asset	611	697	611	697
Unrealized gains (losses) still held, assets	7	8	5	14
Trading non-derivative assets | Mortgage-backed securities - Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2,130	2,744	2,680	2,854
Net realized/unrealized gains (losses) included in principal transactions	129	160	206	317
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	133	79	178	153
Transfers out of Level 3, assets	(66)	(129)	(282)	(282)
Purchases, assets	631	704	1,129	1,680
Issuance, assets	0	0	0	0
Sales, assets	(751)	(948)	(1,705)	(2,112)
Settlements, assets	0	0	0	0
Balance at end of period, asset	2,206	2,610	2,206	2,610
Unrealized gains (losses) still held, assets	14	98	(91)	124
Trading non-derivative assets | Mortgage-backed securities - Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	599	241	440	256
Net realized/unrealized gains (losses) included in principal transactions	(2)	6	13	11
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	68	41	156	76
Transfers out of Level 3, assets	(65)	(38)	(78)	(62)
Purchases, assets	92	204	412	236
Issuance, assets	0	0	0	0
Sales, assets	(324)	(45)	(575)	(108)
Settlements, assets	0	0	0	0
Balance at end of period, asset	368	409	368	409
Unrealized gains (losses) still held, assets	(1)	2	(8)	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	3,547	3,773	4,205	4,204
Net realized/unrealized gains (losses) included in principal transactions	153	183	248	426
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	389	318	816	606
Transfers out of Level 3, assets	(471)	(380)	(1,210)	(942)
Purchases, assets	895	1,015	1,880	2,177
Issuance, assets	0	4	0	7
Sales, assets	(1,342)	(1,189)	(2,768)	(2,737)
Settlements, assets	14	(8)	14	(25)
Balance at end of period, asset	3,185	3,716	3,185	3,716
Unrealized gains (losses) still held, assets	20	108	(94)	143
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	0
Net realized/unrealized gains (losses) included in principal transactions	0	3	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	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	(3)	0	(3)
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
Trading non-derivative assets | State and municipal securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	247	121	241	222
Net realized/unrealized gains (losses) included in principal transactions	(2)	2	(10)	4
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	13	134	27	145
Transfers out of Level 3, assets	0	0	(7)	(104)
Purchases, assets	0	9	9	18
Issuance, assets	0	0	0	0
Sales, assets	(9)	(24)	(11)	(43)
Settlements, assets	0	0	0	0
Balance at end of period, asset	249	242	249	242
Unrealized gains (losses) still held, assets	1	(17)	2	(20)
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	115	373	206	416
Net realized/unrealized gains (losses) included in principal transactions	0	(10)	(3)	(16)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	0	37	27	86
Transfers out of Level 3, assets	(8)	(17)	(100)	(102)
Purchases, assets	39	221	105	359
Issuance, assets	0	0	0	0
Sales, assets	(59)	(139)	(99)	(278)
Settlements, assets	(5)	0	(54)	0
Balance at end of period, asset	82	465	82	465
Unrealized gains (losses) still held, assets	(2)	(1)	4	39
Trading non-derivative assets | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	767	1,665	820	1,835
Net realized/unrealized gains (losses) included in principal transactions	128	(109)	204	(82)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	41	66	54	253
Transfers out of Level 3, assets	(26)	(195)	(85)	(340)
Purchases, assets	164	679	511	1,271
Issuance, assets	0	0	0	0
Sales, assets	(355)	(840)	(785)	(1,668)
Settlements, assets	(11)	(4)	(11)	(7)
Balance at end of period, asset	708	1,262	708	1,262
Unrealized gains (losses) still held, assets	(45)	(28)	48	(56)
Trading non-derivative assets | Equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2,598	1,385	2,219	1,057
Net realized/unrealized gains (losses) included in principal transactions	(25)	(42)	(46)	(213)
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	38	1	162	36
Transfers out of Level 3, assets	(173)	(55)	(188)	(60)
Purchases, assets	360	654	742	1,186
Issuance, assets	0	0	0	0
Sales, assets	(57)	(80)	(148)	(143)
Settlements, assets	0	0	0	0
Balance at end of period, asset	2,741	1,863	2,741	1,863
Unrealized gains (losses) still held, assets	66	(160)	55	(58)
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	3,553	3,441	3,294	4,342
Net realized/unrealized gains (losses) included in principal transactions	106	339	233	608
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	505	50	570	83
Transfers out of Level 3, assets	(81)	(53)	(115)	(228)
Purchases, assets	1,696	759	2,759	1,702
Issuance, assets	0	0	0	0
Sales, assets	(1,543)	(1,160)	(2,505)	(3,131)
Settlements, assets	0	0	0	0
Balance at end of period, asset	4,236	3,376	4,236	3,376
Unrealized gains (losses) still held, assets	181	296	179	448
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	4,393	3,452	4,372	3,184
Net realized/unrealized gains (losses) included in principal transactions	201	58	60	81
Net realized/unrealized gains (losses) included in locations other than principal transactions, assets	0	0	0	0
Transfers into Level 3	107	456	317	1,031
Transfers out of Level 3, assets	(1,536)	(715)	(1,928)	(1,179)
Purchases, assets	630	1,811	1,632	2,875
Issuance, assets	19	0	32	0
Sales, assets	(704)	(1,046)	(1,367)	(1,910)
Settlements, assets	(12)	0	(20)	(66)
Balance at end of period, asset	3,098	4,016	3,098	4,016
Unrealized gains (losses) still held, assets	29	21	15	22
Investments
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	5,818	8,367	6,273	7,902
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)	22	(30)	301
Transfers into Level 3	180	676	341	1,065
Transfers out of Level 3, assets	(198)	(210)	(497)	(617)
Purchases, assets	560	640	1,000	1,604
Issuance, assets	0	0	0	0
Sales, assets	(501)	(558)	(860)	(1,107)
Settlements, assets	(177)	(406)	(548)	(617)
Balance at end of period, asset	5,679	8,531	5,679	8,531
Unrealized gains (losses) still held, assets	(6)	140	70	92
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	70	199	38	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	1	(3)	0	45
Transfers into Level 3	59	11	104	35
Transfers out of Level 3, assets	(33)	(17)	(45)	(54)
Purchases, assets	0	0	0	17
Issuance, assets	0	0	0	0
Sales, assets	(1)	(27)	(1)	(66)
Settlements, assets	0	0	0	(1)
Balance at end of period, asset	96	163	96	163
Unrealized gains (losses) still held, assets	1	(3)	(1)	(3)
Investments | Mortgage-backed securities - Residential
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	10	30	8	102
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)	10	(1)	33
Transfers into Level 3	0	17	0	30
Transfers out of Level 3, assets	0	(1)	0	(1)
Purchases, assets	11	0	11	17
Issuance, assets	0	0	0	0
Sales, assets	(8)	(39)	(8)	(164)
Settlements, assets	0	0	0	0
Balance at end of period, asset	10	17	10	17
Unrealized gains (losses) still held, assets	0	0	1	0
Investments | Mortgage-backed securities - Commercial
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2	1	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	0	0	0	0
Transfers into Level 3	0	3	2	4
Transfers out of Level 3, assets	(2)	0	(3)	0
Purchases, assets	0	3	0	3
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	7	0	7
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	82	230	47	289
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)	7	(1)	78
Transfers into Level 3	59	31	106	69
Transfers out of Level 3, assets	(35)	(18)	(48)	(55)
Purchases, assets	11	3	11	37
Issuance, assets	0	0	0	0
Sales, assets	(9)	(66)	(9)	(230)
Settlements, assets	0	0	0	(1)
Balance at end of period, asset	106	187	106	187
Unrealized gains (losses) still held, assets	1	(3)	0	(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	5	7	6	8
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	(1)	(1)
Settlements, assets	0	0	0	0
Balance at end of period, asset	5	7	5	7
Unrealized gains (losses) still held, assets	0	0	0	0
Investments | State and municipal securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	2,247	1,903	2,180	1,643
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	(39)	29	(7)	65
Transfers into Level 3	54	463	159	717
Transfers out of Level 3, assets	(99)	(180)	(238)	(465)
Purchases, assets	166	125	399	498
Issuance, assets	0	0	0	0
Sales, assets	(176)	(238)	(340)	(356)
Settlements, assets	0	0	0	0
Balance at end of period, asset	2,153	2,102	2,153	2,102
Unrealized gains (losses) still held, assets	(43)	37	(31)	72
Investments | Foreign government
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	575	274	678	344
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)	(7)	48	(5)
Transfers into Level 3	(8)	160	(8)	182
Transfers out of Level 3, assets	0	0	(105)	(42)
Purchases, assets	310	280	484	329
Issuance, assets	0	0	0	0
Sales, assets	(223)	(29)	(334)	(107)
Settlements, assets	(158)	(63)	(270)	(86)
Balance at end of period, asset	493	615	493	615
Unrealized gains (losses) still held, assets	4	0	5	0
Investments | Corporate
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	584	531	672	285
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	72	14	46	13
Transfers into Level 3	0	16	2	18
Transfers out of Level 3, assets	(3)	0	(44)	(1)
Purchases, assets	55	19	69	266
Issuance, assets	0	0	0	0
Sales, assets	(9)	(48)	(13)	(49)
Settlements, assets	(1)	(20)	(34)	(20)
Balance at end of period, asset	698	512	698	512
Unrealized gains (losses) still held, assets	0	(2)	0	(4)
Investments | Equity securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	519	831	681	815
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	(4)	(86)	12
Transfers into Level 3	0	6	7	12
Transfers out of Level 3, assets	(7)	(12)	(10)	(12)
Purchases, assets	0	5	0	6
Issuance, assets	0	0	0	0
Sales, assets	(31)	0	(109)	(7)
Settlements, assets	0	0	0	0
Balance at end of period, asset	483	826	483	826
Unrealized gains (losses) still held, assets	(1)	(9)	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	517	1,877	549	1,960
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	3	(20)	11
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	(48)	0	(58)	(42)
Purchases, assets	14	7	33	55
Issuance, assets	0	0	0	0
Sales, assets	0	0	(1)	(97)
Settlements, assets	0	(148)	0	(148)
Balance at end of period, asset	503	1,739	503	1,739
Unrealized gains (losses) still held, assets	22	10	22	5
Investments | Other debt securities
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	0	99	0	50
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	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3, assets	0	0	0	0
Purchases, assets	0	0	0	50
Issuance, assets	0	0	0	0
Sales, assets	0	(1)	0	(1)
Settlements, assets	0	(50)	0	(50)
Balance at end of period, asset	0	48	0	48
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	1,289	2,615	1,460	2,508
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	(53)	(20)	(10)	128
Transfers into Level 3	75	0	75	67
Transfers out of Level 3, assets	(6)	0	6	0
Purchases, assets	4	201	4	363
Issuance, assets	0	0	0	0
Sales, assets	(53)	(176)	(53)	(259)
Settlements, assets	(18)	(125)	(244)	(312)
Balance at end of period, asset	1,238	2,495	1,238	2,495
Unrealized gains (losses) still held, assets	11	107	74	15
Loans
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	3,906	4,142	3,108	4,143
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)	(124)	(74)	(152)
Transfers into Level 3	0	84	689	84
Transfers out of Level 3, assets	(85)	6	(85)	6
Purchases, assets	365	113	574	266
Issuance, assets	42	15	363	65
Sales, assets	(278)	(38)	(375)	(117)
Settlements, assets	(90)	(888)	(360)	(985)
Balance at end of period, asset	3,840	3,310	3,840	3,310
Unrealized gains (losses) still held, assets	26	17	29	17
Mortgage servicing rights
Fair value, assets measured on recurring basis, level 3 fair-value category reconciliation
Balance at beginning of period, asset	1,685	2,586	1,845	2,718
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	270	(101)	193	(215)
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	68	62	111	112
Sales, assets	(9)	(163)	(41)	(135)
Settlements, assets	(90)	(102)	(184)	(198)
Balance at end of period, asset	1,924	2,282	1,924	2,282
Unrealized gains (losses) still held, assets	(77)	(101)	(390)	(216)
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	148	179	78	181
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	27	16	25
Transfers into Level 3	14	0	80	0
Transfers out of Level 3, assets	(5)	0	(7)	0
Purchases, assets	0	1	3	1
Issuance, assets	38	51	98	87
Sales, assets	(9)	(5)	(14)	(9)
Settlements, assets	(57)	(52)	(115)	(84)
Balance at end of period, asset	139	201	139	201
Unrealized gains (losses) still held, assets	$ 348	$ 23	$ 596	$ 17