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Loan Portfolio (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 112,606 | $ 119,394
Discontinued operations | Education Lending |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 339 | 434
Total commercial loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 77,591 | 82,465
Accrued interest | 383 |
Total commercial loans | Commercial and Industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 55,815 | 59,647
Accrued interest | 522 | 417
Total commercial loans | Commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 15,187 | 16,352
Total commercial loans | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 3,066 | 2,530
Total commercial loans | Total commercial real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 18,253 | 18,882
Total commercial loans | Commercial lease financing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 3,523 | 3,936
Total commercial loans | Commercial credit card |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 207 | 172
Total commercial loans | Collateral pledged |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 7 | 8
Total consumer loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 35,015 | 36,929
Accrued interest | 139 |
Total consumer loans | Real estate — residential mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 20,958 | 21,401
Total consumer loans | Home equity loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 7,139 | 7,951
Total consumer loans | Total residential — prime loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 28,097 | 29,352
Total consumer loans | Consumer direct loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 5,890 | 6,508
Total consumer loans | Credit cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 1,002 | 1,026
Total consumer loans | Consumer indirect loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 26 | 43
Total consumer loans | Commercial credit card |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 1,002 | $ 1,026

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