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LOANS AND LEASES - Loan and Lease Portfolio Composition (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Jun. 30, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | $ 137,956 |  | $ 130,042 |  |  |
Allowance for loan and lease losses |  | (2,374) | $ (2,331) | (2,244) | $ (2,235) | $ (2,304) | $ (2,255)
Net loans and leases | [1] | 135,582 |  | 127,798 |  |  |
Loans and leases net premium (discount) |  | (638) |  | (468) |  |  |
Commercial and industrial |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 62,978 |  | 56,809 |  |  |
Commercial real estate |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 10,732 |  | 11,078 |  |  |
Lease financing |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 5,515 |  | 5,454 |  |  |
Residential mortgage |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 24,502 |  | 24,242 |  |  |
Automobile |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 15,996 |  | 14,564 |  |  |
RV and marine |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 5,805 |  | 5,982 |  |  |
Other consumer |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 2,114 |  | 1,771 |  |  |
Commercial |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 79,225 |  | 73,341 |  |  |
Allowance for loan and lease losses |  | (1,568) | (1,548) | (1,484) | (1,498) | (1,587) | (1,563)
Accrued interest receivable |  | 319 |  | 316 |  |  |
Commercial | Commercial and industrial |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 62,978 |  | 56,809 |  |  |
Commercial | Commercial real estate |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 10,732 |  | 11,078 |  |  |
Commercial | Lease financing |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 5,515 |  | 5,454 |  |  |
Consumer |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 58,731 |  | 56,701 |  |  |
Allowance for loan and lease losses |  | (806) | $ (783) | (760) | $ (737) | $ (717) | $ (692)
Accrued interest receivable |  | 250 |  | 235 |  |  |
Consumer | Residential mortgage |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 24,502 |  | 24,242 |  |  |
Consumer | Automobile |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 15,996 |  | 14,564 |  |  |
Consumer | Home equity |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 10,314 |  | 10,142 |  |  |
Consumer | RV and marine |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | 5,805 |  | 5,982 |  |  |
Consumer | Other consumer |  |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |  |
Loans and leases |  | $ 2,114 |  | $ 1,771 |  |  |
[1] | Includes VIE balances in net loans and leases, other assets, long-term debt, and other liabilities of $769 million, $334 million, $694 million, and $123 million, respectively, at September 30, 2025, and $1.1 billion, $264 million, $1.0 billion, and $109 million, respectively, at December 31, 2024. See Note 15 - “Variable Interest Entities” for additional information.

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