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Credit Quality And Allowance For Credit Losses (Nonaccrual Loans) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | $ 80 |  | $ 80
Nonaccrual Loans with Related Allowance |  | 221 |  | 228
Interest income |  | 1 | $ 1 |
Total Nonaccrual Loans |  | 301 |  | 308
Business loans: | Commercial |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 18 |  | 16
Nonaccrual Loans with Related Allowance |  | 221 |  | 228
Total Nonaccrual Loans |  | 239 |  | 244
Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 15 |  | 9
Nonaccrual Loans with Related Allowance |  | 93 |  | 116
Total Nonaccrual Loans |  | 108 |  | 125
Retail loans: |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 62 |  | 64
Nonaccrual Loans with Related Allowance |  | 0 |  | 0
Total Nonaccrual Loans |  | 62 |  | 64
Retail loans: | Consumer |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  |  |  | 27
Nonaccrual Loans with Related Allowance |  |  |  | 0
Total Nonaccrual Loans |  | 27 |  | 27
Real estate construction | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 0 |  |
Nonaccrual Loans with Related Allowance |  | 20 |  |
Total Nonaccrual Loans |  | 20 |  | 0
Real estate construction | Commercial | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 0 |  |
Nonaccrual Loans with Related Allowance |  | 20 |  |
Total Nonaccrual Loans | [1] | 20 |  | 0
Real estate construction | Other business lines | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Total Nonaccrual Loans | [2] | 0 |  | 0
Commercial mortgage: | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 3 |  | 7
Nonaccrual Loans with Related Allowance |  | 107 |  | 111
Total Nonaccrual Loans |  | 110 |  | 118
Commercial mortgage: | Commercial | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance | [1] | 0 |  | 0
Nonaccrual Loans with Related Allowance | [1] | 45 |  | 49
Total Nonaccrual Loans | [1] | 45 |  | 49
Commercial mortgage: | Other business lines | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance | [2] | 3 |  | 7
Nonaccrual Loans with Related Allowance | [2] | 62 |  | 62
Total Nonaccrual Loans | [2] | 65 |  | 69
Residential mortgage | Retail loans: |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 35 |  | 37
Nonaccrual Loans with Related Allowance |  | 0 |  | 0
Total Nonaccrual Loans |  | 35 |  | 37
Home equity | Retail loans: | Consumer |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 27 |  | 27
Nonaccrual Loans with Related Allowance |  | 0 |  | 0
Total Nonaccrual Loans |  | 27 |  | 27
Other consumer | Retail loans: | Consumer |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 0 |  | 0
Lease financing | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Total Nonaccrual Loans |  | 1 |  | 1
Lease financing | Lease financing | Business loans: | Commercial | Domestic |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  | 0 |  |
Nonaccrual Loans with Related Allowance |  | 1 |  |
Total Nonaccrual Loans |  | $ 1 |  |
Finance Leases Portfolio Segment | Commercial | Domestic | Business Loans |  |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |  |
Nonaccrual Loans with No Related Allowance |  |  |  | 0
Nonaccrual Loans with Related Allowance |  |  |  | 1
Total Nonaccrual Loans |  |  |  | $ 1
[1] | Primarily loans to real estate developers.
[2] | Primarily loans secured by owner-occupied real estate.

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