v3.20.4
Allowance For Credit Losses (Past Due Financing Receivables) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans $ 221 $ 224  
Total 30 plus DPD, Accrual Loans 554 586  
Total Accrual 84,521 82,456  
Nonaccrual 745 507  
Loans, net of unearned income 85,266 82,963 $ 83,152
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 66 62  
Total Accrual 42,452 39,624  
Nonaccrual 418 347  
Loans, net of unearned income 42,870 39,971  
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 6 15  
Total Accrual 5,308 5,464  
Nonaccrual 97 73  
Loans, net of unearned income 5,405 5,537  
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 2  
Total Accrual 291 320  
Nonaccrual 9 11  
Loans, net of unearned income 300 331  
Commercial Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 8 12  
Total 30 plus DPD, Accrual Loans 73 79  
Total Accrual 48,051 45,408  
Nonaccrual 524 431  
Loans, net of unearned income 48,575 45,839  
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 3 2  
Total Accrual 5,280 4,934  
Nonaccrual 114 2  
Loans, net of unearned income 5,394 4,936  
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 1,869 1,621  
Nonaccrual 0 0  
Loans, net of unearned income 1,869 1,621  
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 3 2  
Total Accrual 7,149 6,555  
Nonaccrual 114 2  
Loans, net of unearned income 7,263 6,557  
Residential First Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 156 136  
Total 30 plus DPD, Accrual Loans 301 266  
Total Accrual 16,522 14,458  
Nonaccrual 53 27  
Loans, net of unearned income 16,575 14,485  
Home Equity Lines of Credit[Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 19 32  
Total 30 plus DPD, Accrual Loans 54 74  
Total Accrual 4,493 5,259  
Nonaccrual 46 41  
Loans, net of unearned income 4,539 5,300  
Home Equity Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 13 10  
Total 30 plus DPD, Accrual Loans 30 28  
Total Accrual 2,705 3,078  
Nonaccrual 8 6  
Loans, net of unearned income 2,713 3,084  
Indirect-vehicles [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 4 7  
Total 30 plus DPD, Accrual Loans 23 48  
Total Accrual 934 1,812  
Nonaccrual 0 0  
Loans, net of unearned income 934 1,812  
Indirect-other consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 5 3  
Total 30 plus DPD, Accrual Loans 25 28  
Total Accrual 2,431 3,249  
Nonaccrual 0 0  
Loans, net of unearned income 2,431 3,249  
Consumer Credit Card Financing Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 14 19  
Total 30 plus DPD, Accrual Loans 28 38  
Total Accrual 1,213 1,387  
Nonaccrual 0 0  
Loans, net of unearned income 1,213 1,387  
Other Consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 2 5  
Total 30 plus DPD, Accrual Loans 17 23  
Total Accrual 1,023 1,250  
Nonaccrual 0 0  
Loans, net of unearned income 1,023 1,250  
Consumer Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 213 212  
Total 30 plus DPD, Accrual Loans 478 505  
Total Accrual 29,321 30,493  
Nonaccrual 107 74  
Loans, net of unearned income 29,428 30,567  
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 230 240  
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 30  
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 11  
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 2  
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 3 1  
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 3 1  
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 104 83  
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 24 30  
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 10 12  
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-vehicles [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Past Due less than 90 days 15 31  
Financing Receivables, 30 to 59 Days Past Due [Member] | Indirect-other consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Past Due less than 90 days 12 16  
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 8 11  
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 12 13  
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 185 196  
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 103 122  
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 22 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 1 3  
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 23 24  
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 1  
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 1  
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 47  
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 11 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 7 6  
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-vehicles [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Past Due less than 90 days 4 10  
Financing Receivables, 60 to 89 Days Past Due [Member] | Indirect-other consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
Financing Receivable, Past Due less than 90 days 8 9  
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 8  
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 3 5  
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 $ 80 $ 97