Employee Share-based Incentives - Compensation Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| 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 | $ 459 | $ 380 | $ 899 | $ 804 |
| Accrual of estimated costs of share-based awards to be granted in future periods, predominantly those to full-career eligible employees | 708 | 579 | 1,441 | 1,208 |
| Total noncash compensation expense related to employee share-based incentive plans | $ 1,167 | $ 959 | $ 2,340 | $ 2,012 |