Deposits - Types and Sources of the Firm's Deposits (Detail) - USD ($) $ in Millions |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Deposits [Line Items] | ||
| Savings and demand | $ 261,435 | $ 186,419 |
| Time | 102,792 | 73,543 |
| Total | 364,227 | 259,962 |
| Consumer [Member] | ||
| Deposits [Line Items] | ||
| Savings and demand | 89,150 | 67,395 |
| Time | 20,533 | 29,530 |
| Total | 109,683 | 96,925 |
| Private Bank [Member] | ||
| Deposits [Line Items] | ||
| Savings and demand | 85,427 | 67,185 |
| Time | 9,665 | 1,183 |
| Total | 95,092 | 68,368 |
| Brokered Certificates Of Deposit [Member] | ||
| Deposits [Line Items] | ||
| Savings and demand | 0 | 0 |
| Time | 30,816 | 30,060 |
| Total | 30,816 | 30,060 |
| Deposit Sweep Programs [Member] | ||
| Deposits [Line Items] | ||
| Savings and demand | 37,965 | 22,987 |
| Time | 0 | 0 |
| Total | 37,965 | 22,987 |
| Transaction Banking [Member] | ||
| Deposits [Line Items] | ||
| Savings and demand | 48,618 | 28,852 |
| Time | 5,689 | 0 |
| Total | 54,307 | 28,852 |
| Other [Member] | ||
| Deposits [Line Items] | ||
| Savings and demand | 275 | 0 |
| Time | 36,089 | 12,770 |
| Total | $ 36,364 | $ 12,770 |