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FAIR VALUE MEASUREMENTS - Schedule of Financial Instruments not Recorded at Fair Value (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financial assets: |  |  |
Debt securities held to maturity | [1] | $ 8,599 | $ 9,184
Debt securities held-to-maturity, fair value |  | 7,540 | 8,350
Loans held for sale |  | 33 | 103
Loans held for sale, fair value |  | 33 | 103
Net loans and leases | [2] | 137,142 | 143,861
Net loans and leases, fair value |  | 136,293 | 140,504
Other investment securities, at cost, carrying value |  | 710 | 869
Other investment securities, at cost, estimated fair value |  | 710 | 869
Financial liabilities: |  |  |
Deposits, carrying value |  | 174,776 | 177,342
Deposits, fair value |  | 174,651 | 177,096
Short-term borrowed funds |  | 0 | 505
Short-term borrowed funds, fair value |  | 0 | 505
Long-term borrowed funds, carrying value | [2] | 12,401 | 13,467
Long-term borrowed funds, fair value |  | 12,247 | 13,012
Level 1 |  |  |
Financial assets: |  |  |
Debt securities held to maturity |  | 0 | 0
Debt securities held-to-maturity, fair value |  | 0 | 0
Loans held for sale |  | 0 | 0
Loans held for sale, fair value |  | 0 | 0
Net loans and leases |  | 0 | 0
Net loans and leases, fair value |  | 0 | 0
Other investment securities, at cost, carrying value |  | 0 | 0
Other investment securities, at cost, estimated fair value |  | 0 | 0
Financial liabilities: |  |  |
Deposits, carrying value |  | 0 | 0
Deposits, fair value |  | 0 | 0
Short-term borrowed funds |  |  | 0
Short-term borrowed funds, fair value |  | 0 | 0
Long-term borrowed funds, carrying value |  | 0 | 0
Long-term borrowed funds, fair value |  | 0 | 0
Level 2 |  |  |
Financial assets: |  |  |
Debt securities held to maturity |  | 8,187 | 8,696
Debt securities held-to-maturity, fair value |  | 7,136 | 7,887
Loans held for sale |  | 0 | 0
Loans held for sale, fair value |  | 0 | 0
Net loans and leases |  | 979 | 789
Net loans and leases, fair value |  | 979 | 789
Other investment securities, at cost, carrying value |  | 689 | 851
Other investment securities, at cost, estimated fair value |  | 689 | 851
Financial liabilities: |  |  |
Deposits, carrying value |  | 174,776 | 177,342
Deposits, fair value |  | 174,651 | 177,096
Short-term borrowed funds |  |  | 505
Short-term borrowed funds, fair value |  | 0 | 505
Long-term borrowed funds, carrying value |  | 12,401 | 13,467
Long-term borrowed funds, fair value |  | 12,247 | 13,012
Level 3 |  |  |
Financial assets: |  |  |
Debt securities held to maturity |  | 412 | 488
Debt securities held-to-maturity, fair value |  | 404 | 463
Loans held for sale |  | 33 | 103
Loans held for sale, fair value |  | 33 | 103
Net loans and leases |  | 136,163 | 143,072
Net loans and leases, fair value |  | 135,314 | 139,715
Other investment securities, at cost, carrying value |  | 21 | 18
Other investment securities, at cost, estimated fair value |  | 21 | 18
Financial liabilities: |  |  |
Deposits, carrying value |  | 0 | 0
Deposits, fair value |  | 0 | 0
Short-term borrowed funds |  |  | 0
Short-term borrowed funds, fair value |  | 0 | 0
Long-term borrowed funds, carrying value |  | 0 | 0
Long-term borrowed funds, fair value |  | $ 0 | $ 0
[1] | Includes only collateral pledged by the Company where counterparties have the right to sell or pledge the collateral.
[2] | Includes amounts in consolidated VIEs. See Note 11 for additional information.

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