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Loans and Leases - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accrued interest | $ 287 | $ 226
Net loans and leases | 60,519 | 57,417
Loans and leases | 61,292 | 58,102
Post-Modification Outstanding Recorded Investment | $ 28 | 85
TDR loans balance |  | 180
Held for sale |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
TDR loans balance |  | 30
Commercial | Minimum | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Commercial loan grades | 1 |
Commercial | Maximum | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Commercial loan grades | 16 |
Commercial | C&I |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 32,633 | 31,781
Commercial | Loans to mortgage companies |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 2,019 | 2,258
Loans to mortgage companies | Commercial | C&I |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | 2,019 | 2,258
Finance And Insurance Companies | Commercial | C&I |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and leases | $ 4,100 |
Percentage of loans sensitive to impacts on financial services industry | 18.00% |
Asset Pledged as Collateral |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Net loans and leases | $ 46,100 | $ 38,300

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