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Loans And The Allowance For Credit Losses (Modifications By Class And Segment) (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
Term Extension, Percentage | 0.08% | 0.19% | 0.24% | 0.38%
Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 70 | $ 160 | $ 221 | $ 189
Term Extension, Percentage | 0.07% | 0.16% | 0.23% | 0.19%
Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 24 | $ 1 | $ 182
Term Extension, Percentage | 0.00% | 0.02% | 0.00% | 0.18%
Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 4 | $ 2 | $ 9 | $ 5
Term Extension, Percentage | 0.00% | 0.00% | 0.01% | 0.01%
Commercial Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 26 | $ 92 | $ 39 | $ 256
Term Extension, Percentage | 0.05% | 0.16% | 0.07% | 0.45%
Commercial Portfolio Segment [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 26 | $ 68 | $ 38 | $ 74
Term Extension, Percentage | 0.05% | 0.12% | 0.07% | 0.13%
Commercial Portfolio Segment [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 24 | $ 0 | $ 182
Term Extension, Percentage | 0.00% | 0.04% | 0.00% | 0.32%
Commercial Portfolio Segment [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 1 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Total Investor Real Estate [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 63 | $ 100 | $ 63
Term Extension, Percentage |  | 0.73% | 1.14% | 0.73%
Total Investor Real Estate [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 63 | $ 100 | $ 63
Term Extension, Percentage |  | 0.73% | 1.14% | 0.73%
Total Investor Real Estate [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 0 | $ 0 | $ 0
Term Extension, Percentage |  | 0.00% | 0.00% | 0.00%
Total Investor Real Estate [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 0 | $ 0 | $ 0
Term Extension, Percentage |  | 0.00% | 0.00% | 0.00%
Consumer Portfolio Segment [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 49 | $ 31 | $ 92 | $ 57
Term Extension, Percentage | 0.15% | 0.09% | 0.28% | 0.17%
Consumer Portfolio Segment [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 44 | $ 29 | $ 83 | $ 52
Term Extension, Percentage | 0.13% | 0.09% | 0.25% | 0.16%
Consumer Portfolio Segment [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 0 | $ 1 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Consumer Portfolio Segment [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 4 | $ 2 | $ 8 | $ 5
Term Extension, Percentage | 0.01% | 0.01% | 0.02% | 0.02%
Commercial And Industrial [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 23 | $ 81 | $ 36 | $ 243
Term Extension, Percentage | 0.05% | 0.15% | 0.07% | 0.47%
Commercial And Industrial [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 23 | $ 57 | $ 35 | $ 61
Term Extension, Percentage | 0.05% | 0.11% | 0.07% | 0.12%
Commercial And Industrial [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 24 | $ 0 | $ 182
Term Extension, Percentage | 0.00% | 0.05% | 0.00% | 0.35%
Commercial And Industrial [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 1 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 3 | $ 8 | $ 3 | $ 10
Term Extension, Percentage | 0.05% | 0.17% | 0.06% | 0.21%
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 3 | $ 8 | $ 3 | $ 10
Term Extension, Percentage | 0.05% | 0.17% | 0.06% | 0.21%
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 0 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Commercial Real Estate Mortgage - Owner-Occupied [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 0 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Commercial Real Estate Construction - Owner-Occupied [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 3 |  | $ 3
Term Extension, Percentage |  | 0.81% |  | 0.81%
Commercial Real Estate Construction - Owner-Occupied [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 3 |  | $ 3
Term Extension, Percentage |  | 0.66% |  | 0.66%
Commercial Real Estate Construction - Owner-Occupied [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 0 |  | $ 0
Term Extension, Percentage |  | 0.15% |  | 0.00%
Commercial Real Estate Construction - Owner-Occupied [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 0 |  | $ 0
Term Extension, Percentage |  | 0.00% |  | 0.00%
Commercial investor real estate mortgage [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 63 | $ 100 | $ 63
Term Extension, Percentage |  | 0.98% | 1.53% | 0.98%
Commercial investor real estate mortgage [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 63 | $ 100 | $ 63
Term Extension, Percentage |  | 0.98% | 1.53% | 0.98%
Commercial investor real estate mortgage [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 0 | $ 0 | $ 0
Term Extension, Percentage |  | 0.00% | 0.00% | 0.00%
Commercial investor real estate mortgage [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount |  | $ 0 | $ 0 | $ 0
Term Extension, Percentage |  | 0.00% | 0.00% | 0.00%
Residential First Mortgage [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 45 | $ 27 | $ 83 | $ 50
Term Extension, Percentage | 0.22% | 0.14% | 0.41% | 0.25%
Residential First Mortgage [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 43 | $ 27 | $ 80 | $ 49
Term Extension, Percentage | 0.21% | 0.14% | 0.40% | 0.24%
Residential First Mortgage [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 0 | $ 1 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.01% | 0.00%
Residential First Mortgage [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 0 | $ 2 | $ 1
Term Extension, Percentage | 0.00% | 0.00% | 0.01% | 0.01%
Home Equity Lines of Credit[Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 1 | $ 3 | $ 2
Term Extension, Percentage | 0.06% | 0.03% | 0.08% | 0.06%
Home Equity Lines of Credit[Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 1 | $ 1
Term Extension, Percentage | 0.00% | 0.00% | 0.01% | 0.02%
Home Equity Lines of Credit[Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 0 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Home Equity Lines of Credit[Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 1 | $ 2 | $ 1
Term Extension, Percentage | 0.05% | 0.02% | 0.07% | 0.04%
Home Equity Loan [Member] |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 3 | $ 3 | $ 6 | $ 5
Term Extension, Percentage | 0.13% | 0.11% | 0.24% | 0.21%
Home Equity Loan [Member] | Extended Maturity |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 1 | $ 2 | $ 2 | $ 2
Term Extension, Percentage | 0.05% | 0.06% | 0.08% | 0.10%
Home Equity Loan [Member] | Payment Deferral |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 0 | $ 0 | $ 0 | $ 0
Term Extension, Percentage | 0.00% | 0.00% | 0.00% | 0.00%
Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction |  |  |  |
Financing Receivable, Modifications [Line Items] |  |  |  |
Term extension, amount | $ 2 | $ 1 | $ 4 | $ 3
Term Extension, Percentage | 0.08% | 0.06% | 0.16% | 0.11%

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