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Credit Quality and the Allowance for Loan and Lease Losses - Summary of Amortized Cost Basis of Commercial Loans Modified for Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 737 | $ 377 | $ 1,100 | $ 526
Loan modification program, percentage of modifications to total portfolio | 0.41% | 0.31% | 0.59% | 0.43%
Commercial |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 720 | $ 333 | $ 1,009 | $ 455
Loan modification program, percentage of modifications to total portfolio | 0.59% | 0.47% | 0.83% | 0.64%
Commercial | Term Extension |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 704 | $ 169 | $ 966 | $ 221
Commercial | Term Extension and Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 13 | 0 | 21 | 27
Commercial | Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 2 | 164 | 2 | 207
Commercial | Other |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 1 | 0 | 20 | 0
Commercial | Commercial and industrial loans |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 525 | $ 243 | $ 775 | $ 283
Loan modification program, percentage of modifications to total portfolio | 0.61% | 0.46% | 0.90% | 0.53%
Commercial | Commercial and industrial loans | Term Extension |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 511 | $ 80 | $ 734 | $ 116
Commercial | Commercial and industrial loans | Term Extension and Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 13 | 0 | 21 | 4
Commercial | Commercial and industrial loans | Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 163 | 0 | 163
Commercial | Commercial and industrial loans | Other |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 1 | 0 | 20 | 0
Commercial | Commercial mortgage owner-occupied loans |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 79 | $ 49 | $ 82 | $ 77
Loan modification program, percentage of modifications to total portfolio | 0.65% | 0.83% | 0.67% | 1.31%
Commercial | Commercial mortgage owner-occupied loans | Term Extension |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 77 | $ 48 | $ 80 | $ 53
Commercial | Commercial mortgage owner-occupied loans | Term Extension and Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 23
Commercial | Commercial mortgage owner-occupied loans | Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 2 | 1 | 2 | 1
Commercial | Commercial mortgage owner-occupied loans | Other |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 0
Commercial | Commercial mortgage nonowner-occupied loans |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 83 | $ 0 | $ 85 | $ 2
Loan modification program, percentage of modifications to total portfolio | 0.55% | 0.00% | 0.57% | 0.03%
Commercial | Commercial mortgage nonowner-occupied loans | Term Extension |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 83 | $ 0 | $ 85 | $ 2
Commercial | Commercial mortgage nonowner-occupied loans | Term Extension and Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 0
Commercial | Commercial mortgage nonowner-occupied loans | Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 0
Commercial | Commercial mortgage nonowner-occupied loans | Other |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 0
Commercial | Commercial construction loans |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 33 | $ 41 | $ 67 | $ 93
Loan modification program, percentage of modifications to total portfolio | 0.39% | 0.74% | 0.79% | 1.68%
Commercial | Commercial construction loans | Term Extension |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 33 | $ 41 | $ 67 | $ 50
Commercial | Commercial construction loans | Term Extension and Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 0
Commercial | Commercial construction loans | Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 43
Commercial | Commercial construction loans | Other |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | 0 | 0 | 0 | 0
Residential Mortgage |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 7 | $ 34 | $ 23 | $ 51
Loan modification program, percentage of modifications to total portfolio | 0.04% | 0.19% | 0.12% | 0.29%
Residential Mortgage | Term Extension and Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 5 | $ 22 | $ 14 | $ 38
Loan modification program, percentage of modifications to total portfolio | 0.03% | 0.12% | 0.07% | 0.21%
Residential Mortgage | Payment Delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 2 | $ 0 | $ 2 | $ 0
Loan modification program, percentage of modifications to total portfolio | 0.01% | 0.00% | 0.00% | 0.00%
Residential Mortgage | Term extension, interest rate reduction and payment delay |  |  |  |
Financing Receivable, Modifications |  |  |  |
Financing receivable, excluding accrued interest, modified in period, amount | $ 0 | $ 12 | $ 7 | $ 13
Loan modification program, percentage of modifications to total portfolio | 0.00% | 0.07% | 0.04% | 0.07%

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