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Loans and Related Allowance for Credit Losses (Modified, Amortized Cost Basis) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 1,010 | $ 1,326 | $ 1,660 | $ 2,233
% of Loan Class | 0.31% | 0.41% | 0.51% | 0.69%
Unfunded lending related commitments | $ 400 | $ 400 | $ 400 | $ 400
Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 18 | 0 | 18
Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 820 | 827 | 1,343 | 1,502
Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 137 | 129 | 157 | 171
Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 18 | 22 | 35 | 42
Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 17 | 149 | 25 | 257
Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 103 | 3 | 113
Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 15
Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 14 | 0
Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 17 | 78 | 83 | 115
Commercial and industrial | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 120 | 16 | 145
Commercial and industrial | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 568 | 539 | 828 | 941
Commercial and industrial | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 54 | 159 | 69 | 207
Commercial real estate | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 268 | 538 | 550 | 927
Commercial real estate | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 35 | 84 | 35 | 173
Residential real estate | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified |  | 1 | 1 | 1
Residential real estate | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified |  | 1 | 2 | 1
Residential real estate | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 64 | 30 | 88 | 55
Home equity | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 5 | 3 | 8
Education | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 1 | 3 | 3
Other consumer | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 |  | 2 |
Other consumer | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified |  |  | 1 |
Commercial Portfolio Segment |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 915 | $ 1,256 | $ 1,512 | $ 2,106
% of Loan Class | 0.40% | 0.57% | 0.67% | 0.95%
Commercial Portfolio Segment | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 18 | $ 0 | $ 18
Commercial Portfolio Segment | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 818 | 826 | 1,338 | 1,499
Commercial Portfolio Segment | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified |  | 94 | 66 | 108
Commercial Portfolio Segment | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 72 |  |  |
Commercial Portfolio Segment | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Commercial Portfolio Segment | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 17 | 149 | 24 | 257
Commercial Portfolio Segment | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 102 | 2 | 112
Commercial Portfolio Segment | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 15
Commercial Portfolio Segment | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 14 | 0
Commercial Portfolio Segment | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 7 | 67 | 68 | 97
Commercial Portfolio Segment | Commercial and industrial |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 612 | $ 718 | $ 913 | $ 1,154
% of Loan Class | 0.32% | 0.40% | 0.48% | 0.65%
Commercial Portfolio Segment | Commercial and industrial | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 18 | $ 0 | $ 18
Commercial Portfolio Segment | Commercial and industrial | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 550 | 372 | 788 | 720
Commercial Portfolio Segment | Commercial and industrial | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified |  | 94 | 31 |
Commercial Portfolio Segment | Commercial and industrial | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 37 |  |  | 83
Commercial Portfolio Segment | Commercial and industrial | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Commercial Portfolio Segment | Commercial and industrial | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 17 | 65 | 24 | 109
Commercial Portfolio Segment | Commercial and industrial | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 102 | 2 | 112
Commercial Portfolio Segment | Commercial and industrial | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 15
Commercial Portfolio Segment | Commercial and industrial | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 14 | 0
Commercial Portfolio Segment | Commercial and industrial | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 7 | 67 | 54 | 97
Commercial Portfolio Segment | Commercial real estate |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 303 | $ 538 | $ 599 | $ 952
% of Loan Class | 0.97% | 1.52% | 1.92% | 2.68%
Commercial Portfolio Segment | Commercial real estate | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 0 | $ 0 | $ 0
Commercial Portfolio Segment | Commercial real estate | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 268 | 454 | 550 | 779
Commercial Portfolio Segment | Commercial real estate | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 35 | 0 | 35 | 25
Commercial Portfolio Segment | Commercial real estate | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Commercial Portfolio Segment | Commercial real estate | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 84 | 0 | 148
Commercial Portfolio Segment | Commercial real estate | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Commercial Portfolio Segment | Commercial real estate | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Commercial Portfolio Segment | Commercial real estate | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Commercial Portfolio Segment | Commercial real estate | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 14 | 0
Consumer Portfolio Segment |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 95 | $ 70 | $ 148 | $ 127
% of Loan Class | 0.10% | 0.07% | 0.15% | 0.13%
Consumer Portfolio Segment | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 0 | $ 0 | $ 0
Consumer Portfolio Segment | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 2 | 1 | 5 | 3
Consumer Portfolio Segment | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 65 | 35 | 91 | 63
Consumer Portfolio Segment | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 18 | 22 | 35 | 42
Consumer Portfolio Segment | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 1 | 0
Consumer Portfolio Segment | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 1 | 1 | 1
Consumer Portfolio Segment | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 10 | 11 | 15 | 18
Consumer Portfolio Segment | Residential real estate |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 66 | $ 36 | $ 93 | $ 64
% of Loan Class | 0.15% | 0.08% | 0.21% | 0.14%
Consumer Portfolio Segment | Residential real estate | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 0 | $ 0 | $ 0
Consumer Portfolio Segment | Residential real estate | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 1 | 0
Consumer Portfolio Segment | Residential real estate | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 64 | 30 | 88 | 55
Consumer Portfolio Segment | Residential real estate | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Residential real estate | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Residential real estate | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 1 | 1 | 1
Consumer Portfolio Segment | Residential real estate | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Residential real estate | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Residential real estate | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 2 | 5 | 3 | 8
Consumer Portfolio Segment | Home equity |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 9 | $ 12 | $ 16 | $ 20
% of Loan Class | 0.03% | 0.05% | 0.06% | 0.08%
Consumer Portfolio Segment | Home equity | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 0 | $ 0 | $ 0
Consumer Portfolio Segment | Home equity | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Home equity | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 5 | 3 | 8
Consumer Portfolio Segment | Home equity | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 1 | 1 | 2
Consumer Portfolio Segment | Home equity | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Home equity | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Home equity | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Home equity | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Home equity | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 8 | 6 | 12 | 10
Consumer Portfolio Segment | Credit card |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 18 | $ 21 | $ 33 | $ 39
% of Loan Class | 0.27% | 0.31% | 0.50% | 0.57%
Consumer Portfolio Segment | Credit card | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 0 | $ 0 | $ 0
Consumer Portfolio Segment | Credit card | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Credit card | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Credit card | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 18 | 21 | 33 | 39
Consumer Portfolio Segment | Credit card | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Credit card | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Credit card | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Credit card | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Credit card | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 1 | $ 1 | $ 3 | $ 3
% of Loan Class | 0.06% | 0.06% | 0.19% | 0.17%
Consumer Portfolio Segment | Education | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 | $ 0 | $ 0 | $ 0
Consumer Portfolio Segment | Education | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 | 1 | 3 | 3
Consumer Portfolio Segment | Education | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Education | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 | $ 0 | 0 | 0
Consumer Portfolio Segment | Other consumer |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 1 |  | $ 3 | $ 1
% of Loan Class | 0.02% |  | 0.07% | 0.02%
Consumer Portfolio Segment | Other consumer | Interest Rate Reduction |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 |  | $ 0 | $ 0
Consumer Portfolio Segment | Other consumer | Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 1 |  | 1 | 0
Consumer Portfolio Segment | Other consumer | Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 |  | 0 | 0
Consumer Portfolio Segment | Other consumer | Repayment Plan |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 |  | 1 | 1
Consumer Portfolio Segment | Other consumer | Payment Delay and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 |  | 1 | 0
Consumer Portfolio Segment | Other consumer | Interest Rate Reduction and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 |  | 0 | 0
Consumer Portfolio Segment | Other consumer | Interest Rate Reduction and Payment Delay |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 |  | 0 | 0
Consumer Portfolio Segment | Other consumer | Interest Rate Reduction, Payment Delay, and Term Extension |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | 0 |  | 0 | 0
Consumer Portfolio Segment | Other consumer | Other |  |  |  |
Financing Receivable [Line Items] |  |  |  |
Amortized cost basis, modified | $ 0 |  | $ 0 | $ 0

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