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Loans and the Allowance for Credit Losses (Schedule of Aging Analysis Of Days Past Due (DPD) For Each Portfolio Class) (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | $ 135 | $ 189
Financing Receivable, Total 30 Days for more past due | 388 | 468
Total Accrual | 93,089 | 87,333
Nonaccrual | 369 | 451
Loans, net of unearned income | 93,458 | 87,784
Commercial And Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 4 | 5
Financing Receivable, Total 30 Days for more past due | 41 | 69
Total Accrual | 48,235 | 43,453
Nonaccrual | 257 | 305
Loans, net of unearned income | 48,492 | 43,758
Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 1 | 1
Financing Receivable, Total 30 Days for more past due | 6 | 5
Total Accrual | 5,189 | 5,235
Nonaccrual | 29 | 52
Loans, net of unearned income | 5,218 | 5,287
Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Financing Receivable, Total 30 Days for more past due | 0 | 0
Total Accrual | 256 | 253
Nonaccrual | 10 | 11
Loans, net of unearned income | 266 | 264
Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 5 | 6
Financing Receivable, Total 30 Days for more past due | 47 | 74
Total Accrual | 53,680 | 48,941
Nonaccrual | 296 | 368
Loans, net of unearned income | 53,976 | 49,309
Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Financing Receivable, Total 30 Days for more past due | 0 | 0
Total Accrual | 5,889 | 5,438
Nonaccrual | 3 | 3
Loans, net of unearned income | 5,892 | 5,441
Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Financing Receivable, Total 30 Days for more past due | 0 | 0
Total Accrual | 1,720 | 1,586
Nonaccrual | 0 | 0
Loans, net of unearned income | 1,720 | 1,586
Total Investor Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 0 | 0
Financing Receivable, Total 30 Days for more past due | 0 | 0
Total Accrual | 7,609 | 7,024
Nonaccrual | 3 | 3
Loans, net of unearned income | 7,612 | 7,027
Residential First Mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 78 | 123
Financing Receivable, Total 30 Days for more past due | 191 | 227
Total Accrual | 17,865 | 17,479
Nonaccrual | 27 | 33
Loans, net of unearned income | 17,892 | 17,512
Home Equity Line [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 16 | 21
Financing Receivable, Total 30 Days for more past due | 32 | 42
Total Accrual | 3,514 | 3,704
Nonaccrual | 36 | 40
Loans, net of unearned income | 3,550 | 3,744
Home Equity Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 9 | 12
Financing Receivable, Total 30 Days for more past due | 20 | 23
Total Accrual | 2,517 | 2,503
Nonaccrual | 7 | 7
Loans, net of unearned income | 2,524 | 2,510
Consumer Credit Card [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 11 | 12
Financing Receivable, Total 30 Days for more past due | 24 | 27
Total Accrual | 1,172 | 1,184
Nonaccrual | 0 | 0
Loans, net of unearned income | 1,172 | 1,184
OtherConsumerExitPortfoliosMember |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 2 | 2
Financing Receivable, Total 30 Days for more past due | 12 | 16
Total Accrual | 775 | 1,071
Nonaccrual | 0 | 0
Loans, net of unearned income | 775 | 1,071
Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 14 | 13
Financing Receivable, Total 30 Days for more past due | 62 | 59
Total Accrual | 5,957 | 5,427
Nonaccrual | 0 | 0
Loans, net of unearned income | 5,957 | 5,427
Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
90 plus DPD, Accrual Loans | 130 | 183
Financing Receivable, Total 30 Days for more past due | 341 | 394
Total Accrual | 31,800 | 31,368
Nonaccrual | 70 | 80
Loans, net of unearned income | 31,870 | 31,448
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 78 | 96
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 10 | 29
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 2 | 1
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 12 | 30
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Total Investor Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential First Mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 34 | 31
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 5 | 6
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 3 | 4
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Credit Card [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 5 | 6
Financial Asset, 60 to 89 Days Past Due [Member] | OtherConsumerExitPortfoliosMember |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 3 | 4
Financial Asset, 60 to 89 Days Past Due [Member] | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 16 | 15
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 66 | 66
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 175 | 183
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 27 | 35
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 3 | 3
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 30 | 38
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Total Investor Real Estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 0 | 0
Financial Asset, 30 to 59 Days Past Due [Member] | Residential First Mortgage [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 79 | 73
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 11 | 15
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 8 | 7
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Credit Card [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 8 | 9
Financial Asset, 30 to 59 Days Past Due [Member] | OtherConsumerExitPortfoliosMember |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 7 | 10
Financial Asset, 30 to 59 Days Past Due [Member] | Other consumer |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | 32 | 31
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receiable, Past Due between 30 and 89 Days | $ 145 | $ 145

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