ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| ACL balance, end of period | $ 3,368 | $ 2,478 | ||
| ACL, period increase (decrease) | 625 | |||
| Allowance for loan and lease losses | 3,243 | $ 2,537 | 2,263 | $ 2,244 |
| Commercial | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| ACL balance, end of period | 2,403 | 1,678 | ||
| ACL, period increase (decrease) | 527 | |||
| Allowance for loan and lease losses | 2,305 | 1,731 | 1,520 | 1,484 |
| Commercial | Cadence | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Allowance for loan and lease losses | 438 | |||
| Consumer | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| ACL balance, end of period | 965 | 800 | ||
| ACL, period increase (decrease) | 98 | |||
| Allowance for loan and lease losses | 938 | $ 806 | $ 743 | $ 760 |
| Consumer | Cadence | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Allowance for loan and lease losses | $ 129 |