Fair Value Disclosures (Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Assets at Fair Value |
|
|
| Total trading assets |
$ 266,299
|
$ 298,282
|
| Investment securities - AFS |
61,061
|
55,203
|
| Liabilities at Fair Value |
|
|
| Deposits |
442
|
204
|
| Securities sold under agreements to repurchase |
812
|
800
|
| Other secured financings |
5,245
|
3,863
|
| Borrowings |
51,184
|
46,912
|
| Recurring |
|
|
| Assets at Fair Value |
|
|
| U.S. treasury and agency securities |
68,415
|
48,965
|
| Other sovereign government obligations |
33,941
|
28,060
|
| State and municipal securities |
3,309
|
3,600
|
| MABS |
2,508
|
2,787
|
| Loans and lending commitments |
10,925
|
10,736
|
| Corporate and other debt |
19,205
|
17,538
|
| Corporate equities |
94,243
|
150,355
|
| Derivative and other contracts |
29,173
|
30,813
|
| Netting |
(259,412)
|
(267,598)
|
| Counterparty and cash collateral netting |
(44,175)
|
(47,171)
|
| Investments |
1,462
|
1,840
|
| Physical commodities |
536
|
1,024
|
| Total trading assets |
263,717
|
295,718
|
| Investment securities - AFS |
61,061
|
55,203
|
| Intangible assets |
5
|
3
|
| Total assets at fair value |
324,783
|
350,924
|
| Liabilities at Fair Value |
|
|
| Deposits |
442
|
204
|
| U.S. treasury and agency securities |
11,815
|
17,826
|
| Other sovereign government obligations |
22,845
|
26,873
|
| Corporate and other debt |
8,551
|
7,144
|
| Corporate equities |
56,278
|
52,757
|
| Derivative and other contracts |
27,258
|
26,695
|
| Netting |
(248,181)
|
(257,144)
|
| Counterparty and cash collateral netting |
(32,944)
|
(36,717)
|
| Total trading liabilities |
126,747
|
131,295
|
| Securities sold under agreements to repurchase |
812
|
800
|
| Other secured financings |
5,245
|
3,863
|
| Borrowings |
51,184
|
46,912
|
| Total liabilities at fair value |
184,430
|
183,074
|
| Recurring | Futures Contracts | Customer and Other Receivables, Net |
|
|
| Additional Fair Value Disclosure |
|
|
| Derivative assets, unsettled fair value |
615
|
831
|
| Recurring | Corporate Loans |
|
|
| Assets at Fair Value |
|
|
| Loans and lending commitments |
9,171
|
8,358
|
| Recurring | Residential Real Estate Loans |
|
|
| Assets at Fair Value |
|
|
| Loans and lending commitments |
1,153
|
799
|
| Recurring | Wholesale Real Estate Loans |
|
|
| Assets at Fair Value |
|
|
| Loans and lending commitments |
601
|
1,579
|
| Recurring | Interest Rate |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
158,865
|
180,939
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
146,100
|
163,148
|
| Borrowings |
22,343
|
19,230
|
| Recurring | Credit |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
6,128
|
8,022
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
6,153
|
8,545
|
| Borrowings |
856
|
815
|
| Recurring | Foreign Exchange |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
63,246
|
53,797
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
63,506
|
55,268
|
| Borrowings |
756
|
666
|
| Recurring | Equity |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
47,874
|
44,990
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
50,640
|
47,989
|
| Borrowings |
24,494
|
25,903
|
| Recurring | Commodity and Other |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
12,472
|
10,663
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
9,040
|
8,889
|
| Recurring | Level 1 |
|
|
| Assets at Fair Value |
|
|
| U.S. treasury and agency securities |
38,767
|
22,077
|
| Other sovereign government obligations |
28,395
|
20,234
|
| State and municipal securities |
0
|
0
|
| MABS |
0
|
0
|
| Loans and lending commitments |
0
|
0
|
| Corporate and other debt |
0
|
0
|
| Corporate equities |
93,626
|
149,697
|
| Derivative and other contracts |
923
|
669
|
| Netting |
(4,151)
|
(2,088)
|
| Investments |
412
|
297
|
| Physical commodities |
0
|
0
|
| Total trading assets |
162,123
|
192,974
|
| Investment securities - AFS |
36,399
|
27,522
|
| Intangible assets |
0
|
0
|
| Total assets at fair value |
198,522
|
220,496
|
| Liabilities at Fair Value |
|
|
| Deposits |
0
|
0
|
| U.S. treasury and agency securities |
11,272
|
17,802
|
| Other sovereign government obligations |
21,391
|
24,857
|
| Corporate and other debt |
0
|
0
|
| Corporate equities |
56,064
|
52,653
|
| Derivative and other contracts |
1,087
|
332
|
| Netting |
(4,151)
|
(2,088)
|
| Total trading liabilities |
89,814
|
95,644
|
| Securities sold under agreements to repurchase |
0
|
0
|
| Other secured financings |
0
|
0
|
| Borrowings |
0
|
0
|
| Total liabilities at fair value |
89,814
|
95,644
|
| Recurring | Level 1 | Interest Rate |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
2,793
|
472
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
2,927
|
364
|
| Recurring | Level 1 | Credit |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
0
|
0
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
0
|
0
|
| Recurring | Level 1 | Foreign Exchange |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
62
|
58
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
41
|
23
|
| Recurring | Level 1 | Equity |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
1,256
|
1,101
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
1,042
|
1,001
|
| Recurring | Level 1 | Commodity and Other |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
963
|
1,126
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
1,228
|
1,032
|
| Recurring | Level 2 |
|
|
| Assets at Fair Value |
|
|
| U.S. treasury and agency securities |
29,594
|
26,888
|
| Other sovereign government obligations |
5,529
|
7,825
|
| State and municipal securities |
3,161
|
3,592
|
| MABS |
2,154
|
2,364
|
| Loans and lending commitments |
4,055
|
4,791
|
| Corporate and other debt |
18,129
|
16,837
|
| Corporate equities |
522
|
492
|
| Derivative and other contracts |
67,680
|
69,015
|
| Netting |
(210,190)
|
(216,764)
|
| Investments |
293
|
523
|
| Physical commodities |
536
|
1,024
|
| Total trading assets |
131,653
|
133,351
|
| Investment securities - AFS |
24,662
|
27,681
|
| Intangible assets |
5
|
3
|
| Total assets at fair value |
156,320
|
161,035
|
| Liabilities at Fair Value |
|
|
| Deposits |
415
|
157
|
| U.S. treasury and agency securities |
543
|
24
|
| Other sovereign government obligations |
1,454
|
2,016
|
| Corporate and other debt |
8,550
|
7,141
|
| Corporate equities |
199
|
82
|
| Derivative and other contracts |
55,670
|
58,581
|
| Netting |
(210,190)
|
(216,764)
|
| Total trading liabilities |
66,416
|
67,844
|
| Securities sold under agreements to repurchase |
812
|
650
|
| Other secured financings |
5,037
|
3,624
|
| Borrowings |
47,378
|
43,928
|
| Total liabilities at fair value |
120,058
|
116,203
|
| Recurring | Level 2 | Interest Rate |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
155,027
|
178,704
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
142,746
|
162,239
|
| Recurring | Level 2 | Credit |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
5,707
|
7,602
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
5,772
|
8,166
|
| Recurring | Level 2 | Foreign Exchange |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
63,023
|
53,724
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
63,379
|
55,118
|
| Recurring | Level 2 | Equity |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
45,596
|
40,359
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
47,091
|
44,666
|
| Recurring | Level 2 | Commodity and Other |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
8,517
|
5,390
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
6,872
|
5,156
|
| Recurring | Level 3 |
|
|
| Assets at Fair Value |
|
|
| U.S. treasury and agency securities |
54
|
0
|
| Other sovereign government obligations |
17
|
1
|
| State and municipal securities |
148
|
8
|
| MABS |
354
|
423
|
| Loans and lending commitments |
6,870
|
5,945
|
| Corporate and other debt |
1,076
|
701
|
| Corporate equities |
95
|
166
|
| Derivative and other contracts |
4,745
|
8,300
|
| Netting |
(896)
|
(1,575)
|
| Investments |
757
|
1,020
|
| Physical commodities |
0
|
0
|
| Total trading assets |
14,116
|
16,564
|
| Investment securities - AFS |
0
|
0
|
| Intangible assets |
0
|
0
|
| Total assets at fair value |
14,116
|
16,564
|
| Liabilities at Fair Value |
|
|
| Deposits |
27
|
47
|
| U.S. treasury and agency securities |
0
|
0
|
| Other sovereign government obligations |
0
|
0
|
| Corporate and other debt |
1
|
3
|
| Corporate equities |
15
|
22
|
| Derivative and other contracts |
3,445
|
4,499
|
| Netting |
(896)
|
(1,575)
|
| Total trading liabilities |
3,461
|
4,524
|
| Securities sold under agreements to repurchase |
0
|
150
|
| Other secured financings |
208
|
239
|
| Borrowings |
3,806
|
2,984
|
| Total liabilities at fair value |
7,502
|
7,944
|
| Recurring | Level 3 | Interest Rate |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
1,045
|
1,763
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
427
|
545
|
| Recurring | Level 3 | Credit |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
421
|
420
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
381
|
379
|
| Recurring | Level 3 | Foreign Exchange |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
161
|
15
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
86
|
127
|
| Recurring | Level 3 | Equity |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
1,022
|
3,530
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
2,507
|
2,322
|
| Recurring | Level 3 | Commodity and Other |
|
|
| Assets at Fair Value |
|
|
| Derivative and other contracts |
2,992
|
4,147
|
| Liabilities at Fair Value |
|
|
| Derivative and other contracts |
$ 940
|
$ 2,701
|