Employee Share-based Incentives - Compensation Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share-Based Payment Arrangement [Abstract] | ||||
| Cost of prior grants of restricted stock units (“RSUs”), performance share units (“PSUs”) and stock appreciation rights (“SARs”) that are amortized over their applicable vesting periods | $ 380 | $ 430 | $ 804 | $ 865 |
| Accrual of estimated costs of share-based awards to be granted in future periods, predominantly those to full-career eligible employees | 579 | 514 | 1,208 | 1,017 |
| Total noncash compensation expense related to employee share-based incentive plans | $ 959 | $ 944 | $ 2,012 | $ 1,882 |