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Loans And The Allowance For Credit Losses(Aging and Non-Accrual Performance for Modifications to Troubled Borrowers (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 75 | $ 186 | $ 231 | $ 376
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 635 | 376 | 635 | 376
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 26 | 92 | 39 | 256
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 226 | 256 | 226 | 256
Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | 63 | 100 | 63
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 266 | 63 | 266 | 63
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 49 | 31 | 92 | 57
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 143 | 57 | 143 | 57
Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 392 | 303 | 392 | 303
Current | Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 151 | 206 | 151 | 206
Current | Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 130 | 48 | 130 | 48
Current | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 111 | 49 | 111 | 49
Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 17 | 6 | 17 | 6
Financial Asset, 30 to 89 Days Past Due | Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 2 | 0 | 2
Financial Asset, 30 to 89 Days Past Due | Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Financial Asset, 30 to 89 Days Past Due | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 17 | 4 | 17 | 4
Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 10 | 1 | 10 | 1
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due | Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 10 | 1 | 10 | 1
Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 216 | 66 | 216 | 66
Non-performing [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 75 | 48 | 75 | 48
Non-performing [Member] | Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 136 | 15 | 136 | 15
Non-performing [Member] | Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 5 | 3 | 5 | 3
Commercial And Industrial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 23 | 81 | 36 | 243
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 223 | 243 | 223 | 243
Commercial And Industrial [Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 149 | 198 | 149 | 198
Commercial And Industrial [Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 2 | 0 | 2
Commercial And Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Commercial And Industrial [Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 74 | 43 | 74 | 43
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 3 | 8 | 3 | 10
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 3 | 10 | 3 | 10
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 2 | 6 | 2 | 6
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 1 | 4 | 1 | 4
Commercial Real Estate Construction - Owner-Occupied [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | 3 |  | 3
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current |  | 3 |  | 3
Commercial Real Estate Construction - Owner-Occupied [Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current |  | 2 |  | 2
Commercial Real Estate Construction - Owner-Occupied [Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current |  | 0 |  | 0
Commercial Real Estate Construction - Owner-Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current |  | 0 |  | 0
Commercial Real Estate Construction - Owner-Occupied [Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current |  | 1 |  | 1
Commercial investor real estate mortgage [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | 63 | 100 | 63
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 266 | 63 | 266 | 63
Commercial investor real estate mortgage [Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 130 | 48 | 130 | 48
Commercial investor real estate mortgage [Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Commercial investor real estate mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Commercial investor real estate mortgage [Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 136 | 15 | 136 | 15
Residential First Mortgage [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 45 | 27 | 83 | 50
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 129 | 50 | 129 | 50
Residential First Mortgage [Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 99 | 44 | 99 | 44
Residential First Mortgage [Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 16 | 4 | 16 | 4
Residential First Mortgage [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 10 | 1 | 10 | 1
Residential First Mortgage [Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 4 | 1 | 4 | 1
Home Equity Lines of Credit[Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 1 | 1 | 3 | 2
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 4 | 2 | 4 | 2
Home Equity Lines of Credit[Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 4 | 1 | 4 | 1
Home Equity Lines of Credit[Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Home Equity Lines of Credit[Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Home Equity Lines of Credit[Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 1 | 0 | 1
Home Equity Loan [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | 3 | 3 | 6 | 5
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 10 | 5 | 10 | 5
Home Equity Loan [Member] | Current |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 8 | 4 | 8 | 4
Home Equity Loan [Member] | Financial Asset, 30 to 89 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 1 | 0 | 1 | 0
Home Equity Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | 0 | 0 | 0 | 0
Home Equity Loan [Member] | Non-performing [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Modifications to Troubled Borrowers, modified in the previous 12-month period, Current | $ 1 | $ 1 | $ 1 | $ 1

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