v3.19.3.a.u2
Allowance For Credit Losses (Schedule Of Aging Analysis Of Days Past Due (DPD) For Each Portfolio Class) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans $ 224 $ 227  
Total 30 plus DPD, Accrual Loans 586 677  
Total Accrual 82,456 82,656  
Nonaccrual 507 496  
Loans, net of unearned income 82,963 83,152 $ 79,947
Commercial And Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 11 8  
Total 30 plus DPD, Accrual Loans 62 110  
Total Accrual 39,624 38,975  
Nonaccrual 347 307  
Loans, net of unearned income 39,971 39,282  
Commercial Real Estate Mortgage - Owner-Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 1 0  
Total 30 plus DPD, Accrual Loans 15 19  
Total Accrual 5,464 5,482  
Nonaccrual 73 67  
Loans, net of unearned income 5,537 5,549  
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 2 0  
Total Accrual 320 376  
Nonaccrual 11 8  
Loans, net of unearned income 331 384  
Commercial Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 12 8  
Total 30 plus DPD, Accrual Loans 79 129  
Total Accrual 45,408 44,833  
Nonaccrual 431 382  
Loans, net of unearned income 45,839 45,215  
Commercial Investor Real Estate Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 0 0  
Total 30 plus DPD, Accrual Loans 2 6  
Total Accrual 4,934 4,639  
Nonaccrual 2 11  
Loans, net of unearned income 4,936 4,650  
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 1,621 1,786  
Nonaccrual 0 0  
Loans, net of unearned income 1,621 1,786  
Total Investor Real Estate [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 0 0  
Total 30 plus DPD, Accrual Loans 2 6  
Total Accrual 6,555 6,425  
Nonaccrual 2 11  
Loans, net of unearned income 6,557 6,436  
Residential First Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 136 150  
Total 30 plus DPD, Accrual Loans 266 288  
Total Accrual 14,458 14,236  
Nonaccrual 27 40  
Loans, net of unearned income 14,485 14,276  
Home Equity [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 42 34  
Total 30 plus DPD, Accrual Loans 102 107  
Total Accrual 8,337 9,194  
Nonaccrual 47 63  
Loans, net of unearned income 8,384 9,257  
Indirect-vehicles [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 7 9  
Total 30 plus DPD, Accrual Loans 48 60  
Total Accrual 1,812 3,053  
Nonaccrual 0 0  
Loans, net of unearned income 1,812 3,053  
Indirect-other consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 3 1  
Total 30 plus DPD, Accrual Loans 28 21  
Total Accrual 3,249 2,349  
Nonaccrual 0 0  
Loans, net of unearned income 3,249 2,349  
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 38 41  
Total Accrual 1,387 1,345  
Nonaccrual 0 0  
Loans, net of unearned income 1,387 1,345  
Other Consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 5 5  
Total 30 plus DPD, Accrual Loans 23 25  
Total Accrual 1,250 1,221  
Nonaccrual 0 0  
Loans, net of unearned income 1,250 1,221  
Consumer Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 212 219  
Total 30 plus DPD, Accrual Loans 505 542  
Total Accrual 30,493 31,398  
Nonaccrual 74 103  
Loans, net of unearned income 30,567 31,501  
Financing Receivables, 30 to 59 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 240 310  
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial And Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 30 80  
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 11 12  
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 2 0  
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 43 92  
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 1 6  
Financing Receivables, 30 to 59 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 0 0  
Financing Receivables, 30 to 59 Days Past Due [Member] | Total Investor Real Estate [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 1 6  
Financing Receivables, 30 to 59 Days Past Due [Member] | Residential First Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 83 85  
Financing Receivables, 30 to 59 Days Past Due [Member] | Home Equity [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 42 47  
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-vehicles [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 31 40  
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-other consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 16 13  
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 11 12  
Financing Receivables, 30 to 59 Days Past Due [Member] | Other Consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 13 15  
Financing Receivables, 30 to 59 Days Past Due [Member] | Consumer Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 196 212  
Financing Receivables, 60 to 89 Days Past Due [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 122 140  
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial And Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 21 22  
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Mortgage - Owner-Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 3 7  
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Real Estate Construction - Owner-Occupied [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 0 0  
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 24 29  
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 1 0  
Financing Receivables, 60 to 89 Days Past Due [Member] | Commercial Investor Real Estate Construction [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 0 0  
Financing Receivables, 60 to 89 Days Past Due [Member] | Total Investor Real Estate [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 1 0  
Financing Receivables, 60 to 89 Days Past Due [Member] | Residential First Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 47 53  
Financing Receivables, 60 to 89 Days Past Due [Member] | Home Equity [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 18 26  
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-vehicles [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 10 11  
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-other consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 9 7  
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Credit Card Financing Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 8 9  
Financing Receivables, 60 to 89 Days Past Due [Member] | Other Consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans 5 5  
Financing Receivables, 60 to 89 Days Past Due [Member] | Consumer Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Total 30 plus DPD, Accrual Loans $ 97 $ 111