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Credit Quality And Allowance For Credit Losses (Loan Modifications Made to Borrowers Experiencing Financial Difficulty) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 121 |  | $ 75 | $ 264 |  | $ 140
Percent of Total Class |  | 0.24% |  | 0.14% | 0.52% |  | 0.26%
Weighted-Average Interest Rate Reduction |  | (2.51%) |  | 1.09% | (1.91%) |  | 0.89%
Weighted-Average Term Extension (in months) |  | 1 year 5 months 23 days |  | 9 months 7 days | 1 year 3 months 11 days |  | 11 months 1 day
Term Extension |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [1] | $ 109 |  | $ 63 | $ 236 |  | $ 100
Interest Rate Reduction |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 3 |  | 5 | 4 |  | 21
Combination |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 6 |  | 7 | 21 |  | 13
Payment Delay |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 3 |  | 0 | 3 |  | $ 6
Commercial | Commercial mortgage: | Other business lines |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Term Extension (in months) | [3] |  |  |  |  |  | 1 year 9 months 29 days
Business loans: |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 109 |  | $ 73 | $ 249 |  | $ 137
Percent of Total Class |  | 0.24% |  | 0.15% | 0.54% |  | 0.28%
Weighted-Average Interest Rate Reduction |  | (1.00%) |  | 0.81% | (1.23%) |  | 0.70%
Weighted-Average Term Extension (in months) |  | 1 year 29 days |  | 7 months 13 days | 1 year 18 days |  | 9 months 22 days
Business loans: | Term Extension |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [1] | $ 104 |  | $ 63 | $ 230 |  | $ 99
Business loans: | Term Extension | International |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [1] | 2 |  |  | 4 |  |
Business loans: | Interest Rate Reduction |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 |  | 4 | 0 |  | 21
Business loans: | Interest Rate Reduction | International |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  |  | 0 |  |
Business loans: | Combination |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 5 |  | 6 | 19 |  | 12
Business loans: | Combination | International |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] |  |  |  | 0 |  |
Business loans: | Payment Delay |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | $ 0 |  | 0 | 0 |  | 5
Business loans: | Payment Delay | International |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] |  |  |  | $ 0 |  |
Business loans: | Commercial |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | $ 8 |  |  | $ 8
Percent of Total Class |  |  |  | 0.17% |  |  | 0.17%
Weighted-Average Interest Rate Reduction |  | (1.00%) |  | 0.50% | (1.23%) |  | 0.49%
Weighted-Average Term Extension (in months) |  | 1 year 22 days |  | 7 months 13 days | 1 year 22 days |  | 8 months 1 day
Business loans: | Commercial | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 98 |  | $ 58 | $ 223 |  | $ 113
Percent of Total Class |  | 0.38% |  | 0.20% | 0.86% |  | 0.39%
Business loans: | Commercial | International |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 2 |  |  | $ 4 |  |
Percent of Total Class |  | 0.16% |  |  | 0.37% |  |
Weighted-Average Interest Rate Reduction |  | 0.00% |  |  | 0.00% |  |
Weighted-Average Term Extension (in months) |  | 10 months 21 days |  |  | 11 months 12 days |  |
Business loans: | Commercial | Commercial mortgage: |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Interest Rate Reduction |  | 0.00% |  | 1.00% | 0.00% |  | 0.79%
Weighted-Average Term Extension (in months) |  | 1 year 4 months 28 days |  | 8 months 23 days | 1 year 11 days |  | 1 year 9 months 29 days
Business loans: | Commercial | Commercial mortgage: | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 9 |  | $ 7 | $ 22 |  | $ 16
Percent of Total Class |  | 0.06% |  | 0.05% | 0.15% |  | 0.12%
Business loans: | Commercial | Commercial mortgage: | Other business lines |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Interest Rate Reduction | [3] | 0.00% |  | 1.00% | 0.00% |  | 0.79%
Weighted-Average Term Extension (in months) | [3] | 1 year 4 months 28 days |  | 8 months 23 days | 1 year 11 days |  |
Business loans: | Commercial | Commercial mortgage: | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [3] | $ 9 |  | $ 7 | $ 22 |  | $ 16
Percent of Total Class | [3] | 0.11% |  | 0.08% | 0.26% |  | 0.18%
Business loans: | Commercial | Real estate construction | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | $ 8 |  |  | $ 8
Percent of Total Class |  |  |  | 1.44% |  |  | 1.44%
Business loans: | Commercial | Real estate construction |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Interest Rate Reduction |  |  |  | 0.00% |  |  | 0.00%
Weighted-Average Term Extension (in months) |  |  |  | 6 months |  |  | 6 months
Business loans: | Commercial | Real estate construction | Other business lines |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Interest Rate Reduction |  |  |  | 0.00% |  |  | 0.00%
Weighted-Average Term Extension (in months) |  |  |  | 6 months |  |  | 6 months
Business loans: | Commercial | Term Extension |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | $ 8 |  |  | $ 8
Business loans: | Commercial | Term Extension | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [1] | $ 93 |  | 54 | $ 204 |  | 87
Business loans: | Commercial | Term Extension | Commercial mortgage: | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [1] | 9 |  | 1 | 22 |  | 4
Business loans: | Commercial | Term Extension | Commercial mortgage: | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [1],[3] | 9 |  | 1 | 22 |  | 4
Business loans: | Commercial | Term Extension | Real estate construction | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 8 |  |  | 8
Business loans: | Commercial | Interest Rate Reduction |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 0 |  |  | 0
Business loans: | Commercial | Interest Rate Reduction | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 |  | 4 | 0 |  | 21
Business loans: | Commercial | Interest Rate Reduction | Commercial mortgage: | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 |  | 0 | 0 |  | 0
Business loans: | Commercial | Interest Rate Reduction | Commercial mortgage: | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [3] | 0 |  | 0 | 0 |  | 0
Business loans: | Commercial | Interest Rate Reduction | Real estate construction | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 0 |  |  | 0
Business loans: | Commercial | Combination |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 0 |  |  | 0
Business loans: | Commercial | Combination | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 5 |  | 0 | 19 |  | 1
Business loans: | Commercial | Combination | Commercial mortgage: | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 0 |  | 6 | 0 |  | 11
Business loans: | Commercial | Combination | Commercial mortgage: | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2],[3] | 0 |  | 6 | 0 |  | 11
Business loans: | Commercial | Combination | Real estate construction | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 0 |  |  | 0
Business loans: | Commercial | Payment Delay |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 0 |  |  | 0
Business loans: | Commercial | Payment Delay | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 0 |  | 0 | 0 |  | 4
Business loans: | Commercial | Payment Delay | Commercial mortgage: | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2] | 0 |  | 0 | 0 |  | 1
Business loans: | Commercial | Payment Delay | Commercial mortgage: | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total | [2],[3] | 0 |  | 0 | 0 |  | 1
Business loans: | Commercial | Payment Delay | Real estate construction | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  |  |  | 0 |  |  | 0
Retail loans: |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 12 |  | $ 2 | $ 15 |  | $ 3
Percent of Total Class |  | 0.29% |  | 0.05% | 0.36% |  | 0.07%
Retail loans: | Residential mortgage |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 5 |  |  | $ 5 |  |
Percent of Total Class |  | 0.27% |  |  | 0.27% |  |
Weighted-Average Interest Rate Reduction |  | 0.00% |  |  | 0.00% |  |
Weighted-Average Term Extension (in months) |  | 7 years 11 months 5 days |  |  | 1 year 18 days |  |
Retail loans: | Term Extension |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 5 | [1] | $ 0 | $ 6 | [1] | $ 1
Retail loans: | Term Extension | Residential mortgage |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 5 |  |  | 5 |  |
Retail loans: | Interest Rate Reduction |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 3 |  | 1 | 4 |  | 1
Retail loans: | Interest Rate Reduction | Residential mortgage |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 |  |  | 0 |  |
Retail loans: | Combination |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 1 | [2] | 1 | 2 | [2] | 1
Retail loans: | Combination | Residential mortgage |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 |  |  | 0 |  |
Retail loans: | Payment Delay |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 3 | [2] | 0 | 3 | [2] | 0
Retail loans: | Payment Delay | Residential mortgage |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 |  |  | 0 |  |
Retail loans: | Consumer |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 7 |  | $ 2 | $ 10 |  | $ 3
Percent of Total Class |  | 0.31% |  | 0.09% | 0.43% |  | 0.13%
Weighted-Average Interest Rate Reduction |  | 4.34% |  | 2.85% | 4.01% |  | 2.64%
Weighted-Average Term Extension (in months) |  | 8 years 3 months 29 days |  | 10 years 11 months 5 days | 8 years 7 months 6 days |  | 10 years 9 months
Retail loans: | Consumer | Home equity |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Interest Rate Reduction |  | (4.34%) |  | (2.85%) | (4.01%) |  | (2.64%)
Weighted-Average Term Extension (in months) |  | 10 years |  | 10 years 11 months 5 days | 9 years 11 months 9 days |  | 10 years 9 months
Retail loans: | Consumer | Home equity | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 7 |  | $ 2 | $ 10 |  | $ 3
Percent of Total Class |  | 0.39% |  | 0.11% | 0.55% |  | 0.15%
Retail loans: | Consumer | Consumer Loan |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Weighted-Average Interest Rate Reduction |  | 4.34% |  | 2.85% | 4.01% |  | 2.64%
Weighted-Average Term Extension (in months) |  | 10 years |  | 10 years 11 months 5 days | 9 years 11 months 9 days |  | 10 years 9 months
Retail loans: | Consumer | Term Extension |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 0 | [1] | $ 0 | $ 1 | [1] | $ 1
Retail loans: | Consumer | Term Extension | Home equity | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 0 | [1] | 0 | 1 | [1] | 1
Retail loans: | Consumer | Interest Rate Reduction |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 3 |  | 1 | 4 |  | 1
Retail loans: | Consumer | Interest Rate Reduction | Home equity | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 3 |  | 1 | 4 |  | 1
Retail loans: | Consumer | Combination |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 1 | [2] | 1 | 2 | [2] | 1
Retail loans: | Consumer | Combination | Home equity | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 1 | [2] | 1 | 2 | [2] | 1
Retail loans: | Consumer | Payment Delay |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | 3 | [2] | 0 | 3 | [2] | 0
Retail loans: | Consumer | Payment Delay | Home equity | Other business lines | Domestic |  |  |  |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |  |  |  |
Total |  | $ 3 | [2] | $ 0 | $ 3 | [2] | $ 0
[1] | Represents loan balances where terms were extended or payments were delayed by a more than an insignificant time period, typically more than 180 days, at or above contractual interest rates.
[2] | Relates to FDMs where more than one type of modification was made. For the three- and nine-month periods ended September 30, 2024 and 2023, this primarily related to modifications where the interest rate was reduced and the term was extended.
[3] | Primarily loans secured by owner-occupied real estate.

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