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Allowance For Credit Losses (Past Due Financing Receivables) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | $ 191 | $ 205
Total 30 plus DPD, Accrual Loans | 536 | 581
Total Accrual | 95,956 | 97,574
Nonaccrual | 906 | 805
Loans, net of unearned income | 96,862 | 98,379
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 7 | 11
Total 30 plus DPD, Accrual Loans | 71 | 81
Total Accrual | 54,189 | 55,518
Nonaccrual | 606 | 515
Loans, net of unearned income | 54,795 | 56,033
Total Investor Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 23
Total 30 plus DPD, Accrual Loans | 0 | 23
Total Accrual | 8,522 | 8,617
Nonaccrual | 241 | 233
Loans, net of unearned income | 8,763 | 8,850
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 184 | 171
Total 30 plus DPD, Accrual Loans | 465 | 477
Total Accrual | 33,245 | 33,439
Nonaccrual | 59 | 57
Loans, net of unearned income | 33,304 | 33,496
Commercial And Industrial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 7 | 11
Total 30 plus DPD, Accrual Loans | 62 | 75
Total Accrual | 49,145 | 50,394
Nonaccrual | 556 | 471
Loans, net of unearned income | 49,701 | 50,865
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Total 30 plus DPD, Accrual Loans | 8 | 5
Total Accrual | 4,748 | 4,851
Nonaccrual | 40 | 36
Loans, net of unearned income | 4,788 | 4,887
Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Total 30 plus DPD, Accrual Loans | 1 | 1
Total Accrual | 296 | 273
Nonaccrual | 10 | 8
Loans, net of unearned income | 306 | 281
Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 23
Total 30 plus DPD, Accrual Loans | 0 | 23
Total Accrual | 6,181 | 6,372
Nonaccrual | 241 | 233
Loans, net of unearned income | 6,422 | 6,605
Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Total 30 plus DPD, Accrual Loans | 0 | 0
Total Accrual | 2,341 | 2,245
Nonaccrual | 0 | 0
Loans, net of unearned income | 2,341 | 2,245
Residential First Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 113 | 95
Total 30 plus DPD, Accrual Loans | 263 | 247
Total Accrual | 20,177 | 20,185
Nonaccrual | 22 | 22
Loans, net of unearned income | 20,199 | 20,207
Home Equity Lines of Credit[Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 19 | 20
Total 30 plus DPD, Accrual Loans | 47 | 47
Total Accrual | 3,124 | 3,192
Nonaccrual | 31 | 29
Loans, net of unearned income | 3,155 | 3,221
Home Equity Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 7 | 7
Total 30 plus DPD, Accrual Loans | 20 | 21
Total Accrual | 2,409 | 2,433
Nonaccrual | 6 | 6
Loans, net of unearned income | 2,415 | 2,439
Consumer Credit Card Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 19 | 20
Total 30 plus DPD, Accrual Loans | 37 | 39
Total Accrual | 1,314 | 1,341
Nonaccrual | 0 | 0
Loans, net of unearned income | 1,314 | 1,341
Other consumer- exit portfolios |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Total 30 plus DPD, Accrual Loans | 2 | 3
Total Accrual | 28 | 43
Nonaccrual | 0 | 0
Loans, net of unearned income | 28 | 43
Other Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 26 | 29
Total 30 plus DPD, Accrual Loans | 96 | 120
Total Accrual | 6,193 | 6,245
Nonaccrual | 0 | 0
Loans, net of unearned income | 6,193 | 6,245
Financing Receivables, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 219 | 250
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 43 | 46
Financing Receivables, 30 to 59 Days Past Due [Member] | Total Investor Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 176 | 204
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 38 | 43
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 4 | 3
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 1 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 0
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential First Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 91 | 104
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity Lines of Credit[Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 20 | 17
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 9 | 10
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 10 | 11
Financing Receivables, 30 to 59 Days Past Due [Member] | Other consumer- exit portfolios |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 1 | 2
Financing Receivables, 30 to 59 Days Past Due [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 45 | 60
Financing Receivables, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 126 | 126
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 21 | 24
Financing Receivables, 60 to 89 Days Past Due [Member] | Total Investor Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 105 | 102
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 17 | 21
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 4 | 2
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 1
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 0 | 0
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential First Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 59 | 48
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity Lines of Credit[Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 8 | 10
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 4 | 4
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 8 | 8
Financing Receivables, 60 to 89 Days Past Due [Member] | Other consumer- exit portfolios |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 1 | 1
Financing Receivables, 60 to 89 Days Past Due [Member] | Other Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | $ 25 | $ 31

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