v3.22.0.1
Allowance For Credit Losses (Past Due Financing Receivables) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans $ 189 $ 221  
Total 30 plus DPD, Accrual Loans 468 554  
Total Accrual 87,333 84,521  
Nonaccrual 451 745  
Loans, net of unearned income 87,784 [1] 85,266 [1] $ 82,963
Commercial And Industrial [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 5 7  
Total 30 plus DPD, Accrual Loans 69 66  
Total Accrual 43,453 42,452  
Nonaccrual 305 418  
Loans, net of unearned income 43,758 42,870  
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 5 6  
Total Accrual 5,235 5,308  
Nonaccrual 52 97  
Loans, net of unearned income 5,287 5,405  
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 1  
Total Accrual 253 291  
Nonaccrual 11 9  
Loans, net of unearned income 264 300  
Commercial Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 6 8  
Total 30 plus DPD, Accrual Loans 74 73  
Total Accrual 48,941 48,051  
Nonaccrual 368 524  
Loans, net of unearned income 49,309 48,575  
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 0 3  
Total Accrual 5,438 5,280  
Nonaccrual 3 114  
Loans, net of unearned income 5,441 5,394  
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 1,586 1,869  
Nonaccrual 0 0  
Loans, net of unearned income 1,586 1,869  
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 0 3  
Total Accrual 7,024 7,149  
Nonaccrual 3 114  
Loans, net of unearned income 7,027 7,263  
Residential First Mortgage [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 123 156  
Total 30 plus DPD, Accrual Loans 227 301  
Total Accrual 17,479 16,522  
Nonaccrual 33 53  
Loans, net of unearned income 17,512 16,575  
Home Equity Lines of Credit[Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 21 19  
Total 30 plus DPD, Accrual Loans 42 54  
Total Accrual 3,704 4,493  
Nonaccrual 40 46  
Loans, net of unearned income 3,744 4,539  
Home Equity Loan [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 12 13  
Total 30 plus DPD, Accrual Loans 23 30  
Total Accrual 2,503 2,705  
Nonaccrual 7 8  
Loans, net of unearned income 2,510 2,713  
Consumer Credit Card Financing Receivable [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 12 14  
Total 30 plus DPD, Accrual Loans 27 28  
Total Accrual 1,184 1,213  
Nonaccrual 0 0  
Loans, net of unearned income 1,184 1,213  
Other consumer- exit portfolios      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 2 4  
Total 30 plus DPD, Accrual Loans 16 33  
Total Accrual 1,071 2,035  
Nonaccrual 0 0  
Loans, net of unearned income 1,071 2,035  
Other Consumer [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 13 7  
Total 30 plus DPD, Accrual Loans 59 32  
Total Accrual 5,427 2,353  
Nonaccrual 0 0  
Loans, net of unearned income 5,427 2,353  
Consumer Portfolio Segment [Member]      
Financing Receivable, Recorded Investment, Past Due [Line Items]      
90 plus DPD, Accrual Loans 183 213  
Total 30 plus DPD, Accrual Loans 394 478  
Total Accrual 31,368 29,321  
Nonaccrual 80 107  
Loans, net of unearned income 31,448 29,428  
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 183 230  
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 35 37  
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 3 4  
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 1  
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 42  
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 0 3  
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 0 3  
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 73 104  
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 15 24  
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 10  
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 8  
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 10 22  
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 31 17  
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 145 185  
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 96 103  
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 29 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]      
Financing Receivable, Past Due less than 90 days 1 1  
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 30 23  
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 31 41  
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 6 11  
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 7  
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 6  
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 4 7  
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 15 8  
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 $ 66 $ 80  
[1] Loans are presented net of unearned income, unamortized discounts and premiums and deferred loan fees and costs of $630 million and $678 million at December 31, 2021 and 2020, respectively.