Loans - Summary of Concentration of Secured and Unsecured Loans (Detail) - USD ($)
$ in Millions |
9 Months Ended |
12 Months Ended |
Sep. 30, 2021 |
Dec. 31, 2020 |
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 146,956
|
$ 119,989
|
| Loans receivable at fair value |
$ 12,104
|
$ 13,625
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 54,107
|
$ 48,659
|
| Loans receivable at fair value |
$ 3,020
|
$ 2,751
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 41,775
|
$ 33,023
|
| Loans receivable at fair value |
$ 6,616
|
$ 7,872
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 21,707
|
$ 20,290
|
| Loans receivable at fair value |
$ 1,655
|
$ 1,961
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 13,359
|
$ 5,750
|
| Loans receivable at fair value |
$ 351
|
$ 494
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Installment [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 3,449
|
$ 3,823
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Credit Card Receivable [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 6,251
|
$ 4,270
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 6,308
|
$ 4,174
|
| Loans receivable at fair value |
$ 462
|
$ 547
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 146,956
|
$ 119,989
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Internally rated loans [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 54,107
|
$ 48,659
|
| Internally rated loans [Member] | Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
41,775
|
33,023
|
| Internally rated loans [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
21,707
|
20,290
|
| Internally rated loans [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
13,359
|
5,750
|
| Internally rated loans [Member] | Installment [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
3,449
|
3,823
|
| Internally rated loans [Member] | Credit Card Receivable [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
6,251
|
4,270
|
| Internally rated loans [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 6,308
|
$ 4,174
|
| Secured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
84.00%
|
82.00%
|
| Unsecured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
16.00%
|
18.00%
|
| Amortized cost [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 129,358
|
$ 103,565
|
| Amortized cost [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
48,943
|
44,778
|
| Amortized cost [Member] | Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
35,159
|
25,151
|
| Amortized cost [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
17,892
|
17,096
|
| Amortized cost [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
12,356
|
5,236
|
| Amortized cost [Member] | Credit Card Receivable [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
6,251
|
4,270
|
| Amortized cost [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
5,308
|
3,211
|
| Fair Value [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
12,104
|
13,625
|
| Fair Value [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
3,020
|
2,751
|
| Fair Value [Member] | Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
6,616
|
7,872
|
| Fair Value [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
1,655
|
1,961
|
| Fair Value [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
351
|
494
|
| Fair Value [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
462
|
547
|
| Fair Value [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
12,104
|
13,625
|
| Held for sale [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
5,494
|
2,799
|
| Held for sale [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
2,144
|
1,130
|
| Held for sale [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
2,160
|
1,233
|
| Held for sale [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
652
|
20
|
| Held for sale [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
538
|
416
|
| Held for sale [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
5,494
|
2,799
|
| Loans Receivable [Member] | Amortized cost [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
129,358
|
103,565
|
| Loans Receivable [Member] | Investment-Grade [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 51,082
|
$ 35,840
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Loans Receivable [Member] | Investment-Grade [Member] | Internally rated loans [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 14,048
|
$ 9,478
|
| Loans Receivable [Member] | Investment-Grade [Member] | Internally rated loans [Member] | Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
29,631
|
22,098
|
| Loans Receivable [Member] | Investment-Grade [Member] | Internally rated loans [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
3,463
|
1,792
|
| Loans Receivable [Member] | Investment-Grade [Member] | Internally rated loans [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
1,247
|
636
|
| Loans Receivable [Member] | Investment-Grade [Member] | Internally rated loans [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 2,693
|
$ 1,836
|
| Loans Receivable [Member] | Investment-Grade [Member] | Secured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
87.00%
|
83.00%
|
| Loans Receivable [Member] | Investment-Grade [Member] | Unsecured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
13.00%
|
17.00%
|
| Loans Receivable [Member] | Investment-Grade [Member] | Amortized cost [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 47,429
|
$ 33,532
|
| Loans Receivable [Member] | Investment-Grade [Member] | Fair Value [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
2,502
|
2,084
|
| Loans Receivable [Member] | Investment-Grade [Member] | Held for sale [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
1,151
|
224
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 76,876
|
$ 66,327
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Internally rated loans [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 39,809
|
$ 38,704
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Internally rated loans [Member] | Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
5,595
|
5,331
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Internally rated loans [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
17,903
|
17,480
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Internally rated loans [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
11,051
|
3,852
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Internally rated loans [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 2,518
|
$ 960
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Secured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
92.00%
|
90.00%
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Unsecured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
8.00%
|
10.00%
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Amortized cost [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 67,434
|
$ 58,250
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Fair Value [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
5,279
|
5,925
|
| Loans Receivable [Member] | Non-Investment-Grade [Member] | Held for sale [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
4,163
|
2,152
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 18,998
|
$ 17,822
|
| Concentration Risk,Percentage |
100.00%
|
100.00%
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Corporate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 250
|
$ 477
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Wealth management [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
6,549
|
5,594
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Commercial real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
341
|
1,018
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Residential real estate [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
1,061
|
1,262
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Installment [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
3,449
|
3,823
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Credit Card Receivable [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
6,251
|
4,270
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Internally rated loans [Member] | Other [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 1,097
|
$ 1,378
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Secured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
42.00%
|
46.00%
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Unsecured Loans [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Concentration Risk,Percentage |
58.00%
|
54.00%
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Amortized cost [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans and Leases Receivable, Gross |
$ 14,495
|
$ 11,783
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Fair Value [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans receivable at fair value |
4,323
|
5,616
|
| Loans Receivable [Member] | Other Metrics/Unrated [Member] | Held for sale [Member] | Internally rated loans [Member] |
|
|
| Financing Receivable, Recorded Investment [Line Items] |
|
|
| Loans Receivable Held-for-sale, Amount |
$ 180
|
$ 423
|