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Credit Quality And Allowance For Credit Losses (Nonaccrual Loans) (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | $ 93 | $ 80
Nonaccrual Loans with Related Allowance |  | 155 | 228
Total Loans |  | 248 | 308
Business loans: | Commercial |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | 23 | 16
Nonaccrual Loans with Related Allowance |  | 155 | 228
Total Loans |  | 178 | 244
Business loans: | Commercial | Domestic |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | 12 | 9
Nonaccrual Loans with Related Allowance |  | 87 | 116
Total Loans |  | 99 | 125
Retail loans: |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | 70 | 64
Nonaccrual Loans with Related Allowance |  | 0 | 0
Total Loans |  | 70 | 64
Retail loans: | Consumer |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  |  | 27
Nonaccrual Loans with Related Allowance |  |  | 0
Total Loans |  | 28 | 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 |  | 11 |
Total Loans |  | 11 | 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 |  | 11 |
Total Loans | [1] | 11 | 0
Real estate construction | Other business lines | Business loans: | Commercial | Domestic |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Total Loans | [2] | 0 | 0
Commercial mortgage: | Business loans: | Commercial | Domestic |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | 11 | 7
Nonaccrual Loans with Related Allowance |  | 57 | 111
Total Loans |  | 68 | 118
Commercial mortgage: | Commercial | Business loans: | Commercial | Domestic |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance | [1] |  | 0
Nonaccrual Loans with Related Allowance | [1] |  | 49
Total Loans | [1] | 0 | 49
Commercial mortgage: | Other business lines | Business loans: | Commercial | Domestic |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance | [2] | 11 | 7
Nonaccrual Loans with Related Allowance | [2] | 57 | 62
Total Loans | [2] | 68 | 69
Residential mortgage | Retail loans: |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | 42 | 37
Nonaccrual Loans with Related Allowance |  | 0 | 0
Total Loans |  | 42 | 37
Home equity | Retail loans: | Consumer |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  | 28 | 27
Nonaccrual Loans with Related Allowance |  | 0 | 0
Total Loans |  | 28 | 27
Other consumer | Retail loans: | Consumer |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Total Loans |  | 0 | 0
Lease financing | Business loans: | Commercial | Domestic |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Total Loans |  | $ 0 | 1
Finance Leases Portfolio Segment | Lease financing | Commercial | Domestic | Business Loans |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Nonaccrual Loans with No Related Allowance |  |  | 0
Nonaccrual Loans with Related Allowance |  |  | 1
Total Loans |  |  | $ 1
[1] | Primarily loans to real estate developers.
[2] | Primarily loans secured by owner-occupied real estate.

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