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Loan Portfolio - Loan Portfolio by Portfolio Segment (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 110,430 | $ 106,541
Accrued interest | 453 | 459
Discontinued operations | Education Lending |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 182 | 205
Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 81,568 | 76,509
Accrued interest | 338 | 338
Total commercial loans | Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 62,734 | 57,688
Total commercial loans | Total commercial real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 16,837 | 16,551
Total commercial loans | Commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 13,941 | 13,707
Total commercial loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 2,896 | 2,844
Total commercial loans | Commercial lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 1,997 | 2,270
Total commercial loans | Credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 208 | 205
Total consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 28,862 | 30,032
Accrued interest | 114 | 121
Total consumer loans | Real estate — residential mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 18,178 | 18,732
Total consumer loans | Home equity loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 5,408 | 5,703
Total consumer loans | Total residential loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 23,586 | 24,435
Total consumer loans | Other consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 4,349 | 4,644
Total consumer loans | Credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 927 | $ 953

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