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Credit Quality and the Allowance for Loan and Lease Losses - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Financing Receivable, Allowance for Credit Losses |  |  |
Mortgage loans in process of foreclosure amount | $ 110 |  | $ 94
Financing receivable, excluding accrued interest, modified in period, amount | $ 254 | $ 207 |
Loan modification program, percentage of modifications to total portfolio | 0.21% | 0.18% |
Loan modification program, loans excluded from modification program | $ 19 | $ 8 |
Unfunded commitment amounts | 114 |  | $ 88
Commercial |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 224 | $ 170 |
Loan modification program, percentage of modifications to total portfolio | 0.31% | 0.24% |
Commercial | Minimum |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Term extension period | 3 months |  |
Commercial | Maximum |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Term extension period | 12 months |  |
Residential Mortgage |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 18 | $ 26 |
Loan modification program, percentage of modifications to total portfolio | 0.10% | 0.15% |
Modification program option, mortgage term | 480 months |  |
Modification program option, in-process modifications | $ 3 | $ 1 |
Residential Mortgage | Minimum |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Modification program option, trial period | 3 months |  |
Modification program option, mortgage interest payment deferral, term | 6 months |  |
Residential Mortgage | Maximum |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Modification program option, trial period | 4 months |  |
Modification program option, mortgage interest payment deferral, term | 12 months |  |
Consumer |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 12 | $ 11 |
Loan modification program, percentage of modifications to total portfolio | 0.04% | 0.04% |
Consumer | Home equity |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 4 | $ 3 |
Loan modification program, percentage of modifications to total portfolio | 0.09% | 0.08% |
Modification program option, mortgage term | 360 months |  |

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