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Loans and Leases - Loan Modifications to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 46 | $ 0
% of Total Class | 0.10% | 0.00%
Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 281 | $ 227
% of Total Class | 0.40% | 0.40%
Principal Forgiveness |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 1 | $ 0
% of Total Class | 0.00% | 0.00%
Combination - Term Extension and Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 35 | $ 3
% of Total Class | 0.10% | 0.00%
Commercial: | Commercial real estate | Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 46 | $ 0
% of Total Class | 0.30% | 0.00%
Commercial: | Commercial real estate | Interest Rate Reduction | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 7.80% |
Commercial: | Commercial real estate | Interest Rate Reduction | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 7.13% |
Commercial: | Commercial real estate | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 142 | $ 116
% of Total Class | 1.00% | 0.80%
Weighted average life of loans | 1 year 3 months 18 days | 1 year 6 months
Commercial: | Commercial real estate | Combination - Term Extension and Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 33 | $ 0
% of Total Class | 0.20% | 0.00%
Weighted average life of loans | 2 years |
Commercial: | Commercial real estate | Combination - Term Extension and Interest Rate Reduction | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 7.81% |
Commercial: | Commercial real estate | Combination - Term Extension and Interest Rate Reduction | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 6.86% |
Commercial: | Commercial and industrial | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 139 | $ 111
% of Total Class | 0.40% | 0.30%
Weighted average life of loans | 1 year 1 month 6 days | 1 year 4 months 24 days
Commercial: | Commercial and industrial | Combination - Term Extension and Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 0 | $ 0
% of Total Class | 0.00% | 0.00%
Weighted average life of loans | 1 year 2 months 12 days |
Commercial: | Commercial and industrial | Combination - Term Extension and Interest Rate Reduction | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 9.37% |
Commercial: | Commercial and industrial | Combination - Term Extension and Interest Rate Reduction | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 8.33% |
Consumer: | Consumer Real Estate | Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 0 | $ 0
% of Total Class | 0.00% | 0.00%
Consumer: | Consumer Real Estate | Interest Rate Reduction | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 9.62% | 9.93%
Consumer: | Consumer Real Estate | Interest Rate Reduction | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 5.46% | 6.56%
Consumer: | Consumer Real Estate | Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 0 | $ 0
% of Total Class | 0.00% | 0.00%
Weighted average life of loans | 10 years | 22 years
Consumer: | Consumer Real Estate | Principal Forgiveness |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 1 | $ 0
% of Total Class | 0.00% | 0.00%
Decrease from loan modification (less than) | $ 1 | $ 1
Consumer: | Consumer Real Estate | Combination - Term Extension and Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 2 | $ 3
% of Total Class | 0.00% | 0.00%
Weighted average life of loans | 15 years 2 months 12 days | 10 years 10 months 24 days
Consumer: | Consumer Real Estate | Combination - Term Extension and Interest Rate Reduction | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 7.47% | 8.66%
Consumer: | Consumer Real Estate | Combination - Term Extension and Interest Rate Reduction | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 3.76% | 4.06%
Consumer: | Credit Card and Other | Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Balance | $ 0 | $ 0
% of Total Class | 0.00% | 0.00%
Consumer: | Credit Card and Other | Interest Rate Reduction | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 14.90% | 4.78%
Consumer: | Credit Card and Other | Interest Rate Reduction | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted average interest rate of loans | 0.00% | 3.65%

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