Business Segments - Total Net Revenues and Pre-Tax Earnings By Geographic Region (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
| Segment Reporting Information [Line Items] | ||||
| Net revenues | $ 13,608 | $ 10,781 | $ 46,700 | $ 32,819 |
| Pre-tax earnings | $ 6,842 | $ 4,299 | $ 22,019 | $ 6,938 |
| Percentage of total net revenues | 100.00% | 100.00% | 100.00% | 100.00% |
| Percentage of total pre-tax earnings | 100.00% | 100.00% | 100.00% | 100.00% |
| Americas [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Net revenues | $ 8,169 | $ 6,873 | $ 28,951 | $ 20,333 |
| Pre-tax earnings | $ 4,004 | $ 2,926 | $ 13,484 | $ 5,330 |
| Percentage of total net revenues | 60.00% | 64.00% | 62.00% | 62.00% |
| Percentage of total pre-tax earnings | 59.00% | 68.00% | 61.00% | 77.00% |
| Europe, Middle East and Africa [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Net revenues | $ 3,394 | $ 2,470 | $ 11,585 | $ 8,031 |
| Pre-tax earnings | $ 1,922 | $ 935 | $ 6,012 | $ 1,937 |
| Percentage of total net revenues | 25.00% | 23.00% | 25.00% | 24.00% |
| Percentage of total pre-tax earnings | 28.00% | 22.00% | 27.00% | 28.00% |
| Asia [Member] | ||||
| Segment Reporting Information [Line Items] | ||||
| Net revenues | $ 2,045 | $ 1,438 | $ 6,164 | $ 4,455 |
| Pre-tax earnings | $ 916 | $ 438 | $ 2,523 | $ (329) |
| Percentage of total net revenues | 15.00% | 13.00% | 13.00% | 14.00% |
| Percentage of total pre-tax earnings | 13.00% | 10.00% | 12.00% | (5.00%) |