COMMISSIONS AND FEES; ADMINISTRATION AND OTHER FIDUCIARY FEES - Administration and Other Fiduciary Fees (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Commissions and fees | ||
| Total administration and other fiduciary fees | $ 1,123 | $ 1,045 |
| Custody fees | ||
| Commissions and fees | ||
| Total administration and other fiduciary fees | 565 | 479 |
| Fiduciary fees | ||
| Commissions and fees | ||
| Total administration and other fiduciary fees | 426 | 434 |
| Guarantee fees | ||
| Commissions and fees | ||
| Total administration and other fiduciary fees | 132 | 132 |
| Administration and other fiduciary fees | ||
| Commissions and fees | ||
| Total administration and other fiduciary fees | $ 1,123 | $ 1,045 |