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Allowance For Credit Losses (Past Due Financing Receivables) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | $ 163 | $ 208
Total 30 plus DPD, Accrual Loans | 623 | 539
Total Accrual | 98,300 | 96,509
Nonaccrual | 642 | 500
Loans, net of unearned income | 98,942 | 97,009
Commercial And Industrial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 13 | 30
Total 30 plus DPD, Accrual Loans | 65 | 86
Total Accrual | 51,243 | 50,558
Nonaccrual | 361 | 347
Loans, net of unearned income | 51,604 | 50,905
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 1 | 1
Total 30 plus DPD, Accrual Loans | 8 | 10
Total Accrual | 4,790 | 5,074
Nonaccrual | 43 | 29
Loans, net of unearned income | 4,833 | 5,103
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 | 0 | 0
Total Accrual | 260 | 292
Nonaccrual | 10 | 6
Loans, net of unearned income | 270 | 298
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 14 | 31
Total 30 plus DPD, Accrual Loans | 73 | 96
Total Accrual | 56,293 | 55,924
Nonaccrual | 414 | 382
Loans, net of unearned income | 56,707 | 56,306
Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 40
Total 30 plus DPD, Accrual Loans | 115 | 40
Total Accrual | 6,267 | 6,340
Nonaccrual | 169 | 53
Loans, net of unearned income | 6,436 | 6,393
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 | 2,301 | 1,986
Nonaccrual | 0 | 0
Loans, net of unearned income | 2,301 | 1,986
Total Investor Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 40
Total 30 plus DPD, Accrual Loans | 115 | 40
Total Accrual | 8,568 | 8,326
Nonaccrual | 169 | 53
Loans, net of unearned income | 8,737 | 8,379
Residential First Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 81 | 81
Total 30 plus DPD, Accrual Loans | 219 | 213
Total Accrual | 20,035 | 18,779
Nonaccrual | 24 | 31
Loans, net of unearned income | 20,059 | 18,810
Home Equity Lines of Credit[Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 16 | 15
Total 30 plus DPD, Accrual Loans | 49 | 45
Total Accrual | 3,211 | 3,482
Nonaccrual | 29 | 28
Loans, net of unearned income | 3,240 | 3,510
Home Equity Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 7 | 8
Total 30 plus DPD, Accrual Loans | 18 | 19
Total Accrual | 2,422 | 2,483
Nonaccrual | 6 | 6
Loans, net of unearned income | 2,428 | 2,489
Consumer Credit Card Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 17 | 15
Total 30 plus DPD, Accrual Loans | 35 | 31
Total Accrual | 1,261 | 1,248
Nonaccrual |  | 0
Loans, net of unearned income | 1,261 | 1,248
Other consumer- exit portfolios |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 1 | 1
Total 30 plus DPD, Accrual Loans | 7 | 11
Total Accrual | 356 | 570
Nonaccrual | 0 | 0
Loans, net of unearned income | 356 | 570
Other Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 27 | 17
Total 30 plus DPD, Accrual Loans | 107 | 84
Total Accrual | 6,154 | 5,697
Nonaccrual | 0 | 0
Loans, net of unearned income | 6,154 | 5,697
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 149 | 137
Total 30 plus DPD, Accrual Loans | 435 | 403
Total Accrual | 33,439 | 32,259
Nonaccrual | 59 | 65
Loans, net of unearned income | 33,498 | 32,324
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 | 347 | 218
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 | 37 | 36
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 | 5 | 7
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 | 0 | 0
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 | 42 | 43
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 | 115 | 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] | Total Investor Real Estate [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 115 | 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 | 97 | 87
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 | 19 | 18
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 | 7 | 8
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 | 11 | 9
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 | 4 | 7
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 | 52 | 46
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 | 190 | 175
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 | 113 | 113
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 | 15 | 20
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 | 2 | 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 | 0
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 | 17 | 22
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] | 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] | Residential First Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Financing Receivable, Past Due less than 90 days | 41 | 45
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 | 14 | 12
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 | 3
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 | 7 | 7
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 | 2 | 3
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 | 28 | 21
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 | $ 96 | $ 91

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