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Loan Portfolio (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 106,541 | $ 104,260
Accrued interest | 459 | 456
Asset Pledged as Collateral | Federal Home Loan Bank advances |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 71,000 | 67,500
Discontinued operations | Education Lending |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 205 | 257
Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 76,509 | 71,891
Accrued interest | 338 | 322
Total commercial loans | Commercial and Industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 57,688 | 52,909
Total commercial loans | Commercial and Industrial | Collateral pledged |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans |  | 211
Total commercial loans | Real estate — commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 13,707 | 13,310
Total commercial loans | Real estate — construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 2,844 | 2,936
Total commercial loans | Total commercial real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 16,551 | 16,246
Total commercial loans | Commercial lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 2,270 | 2,736
Total commercial loans | Commercial lease financing | Collateral pledged |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 1 | 3
Total commercial loans | Commercial credit card |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 205 | 212
Total consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 30,032 | 32,369
Accrued interest | 121 | 134
Total consumer loans | Real estate — residential mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 18,732 | 19,886
Total consumer loans | Home equity loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 5,703 | 6,358
Total consumer loans | Other consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 4,644 | 5,167
Total consumer loans | Credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 953 | 958
Total consumer loans | Commercial credit card |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 953 | $ 958

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