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Allowance For Credit Losses (Past Due Financing Receivables) (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | $ 158 | $ 208
Total 30 plus DPD, Accrual Loans | 453 | 539
Total Accrual | 97,503 | 96,509
Nonaccrual | 554 | 500
Loans, net of unearned income | 98,057 | 97,009
Commercial And Industrial [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 23 | 30
Total 30 plus DPD, Accrual Loans | 70 | 86
Total Accrual | 51,426 | 50,558
Nonaccrual | 385 | 347
Loans, net of unearned income | 51,811 | 50,905
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 1
Total 30 plus DPD, Accrual Loans | 7 | 10
Total Accrual | 4,904 | 5,074
Nonaccrual | 34 | 29
Loans, net of unearned income | 4,938 | 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 | 300 | 292
Nonaccrual | 6 | 6
Loans, net of unearned income | 306 | 298
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 23 | 31
Total 30 plus DPD, Accrual Loans | 77 | 96
Total Accrual | 56,630 | 55,924
Nonaccrual | 425 | 382
Loans, net of unearned income | 57,055 | 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 | 1 | 40
Total Accrual | 6,325 | 6,340
Nonaccrual | 67 | 53
Loans, net of unearned income | 6,392 | 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 | 2,040 | 1,986
Nonaccrual | 0 | 0
Loans, net of unearned income | 2,040 | 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 | 1 | 40
Total Accrual | 8,365 | 8,326
Nonaccrual | 67 | 53
Loans, net of unearned income | 8,432 | 8,379
Residential First Mortgage [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 77 | 81
Total 30 plus DPD, Accrual Loans | 188 | 213
Total Accrual | 19,146 | 18,779
Nonaccrual | 26 | 31
Loans, net of unearned income | 19,172 | 18,810
Home Equity Lines of Credit[Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 17 | 15
Total 30 plus DPD, Accrual Loans | 45 | 45
Total Accrual | 3,367 | 3,482
Nonaccrual | 30 | 28
Loans, net of unearned income | 3,397 | 3,510
Home Equity Loan [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 8 | 8
Total 30 plus DPD, Accrual Loans | 18 | 19
Total Accrual | 2,440 | 2,483
Nonaccrual | 6 | 6
Loans, net of unearned income | 2,446 | 2,489
Consumer Credit Card Financing Receivable [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 15 | 15
Total 30 plus DPD, Accrual Loans | 30 | 31
Total Accrual | 1,219 | 1,248
Nonaccrual | 0 | 0
Loans, net of unearned income | 1,219 | 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 | 8 | 11
Total Accrual | 488 | 570
Nonaccrual | 0 | 0
Loans, net of unearned income | 488 | 570
Other Consumer [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 17 | 17
Total 30 plus DPD, Accrual Loans | 86 | 84
Total Accrual | 5,848 | 5,697
Nonaccrual | 0 | 0
Loans, net of unearned income | 5,848 | 5,697
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 135 | 137
Total 30 plus DPD, Accrual Loans | 375 | 403
Total Accrual | 32,508 | 32,259
Nonaccrual | 62 | 65
Loans, net of unearned income | 32,570 | 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 | 200 | 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 | 33 | 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 | 38 | 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 | 1 | 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 | 1 | 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 | 74 | 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 | 18 | 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 | 9 | 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 | 5 | 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 | 48 | 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 | 161 | 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 | 95 | 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 | 14 | 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 | 16 | 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 | 37 | 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 | 10 | 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 | 3 | 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 | 6 | 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 | 21 | 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 | $ 79 | $ 91

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