v3.22.0.1
Allowance For Credit Losses (Analysis Of The Allowance For Credit Losses By Portfolio Segment) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]      
Allowance for loan losses, beginning of period $ 2,167 $ 869 $ 840
Cumulative change in accounting guidance   438  
Allowance for loan losses, beginning of period as adjusted for CECL   1,307  
Provision (credit) for loan losses (493) 1,312 387
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase 9 60  
Loan Losses:      
Charge-offs (328) (613) (443)
Recoveries 124 101 85
Net loan losses (204) (512) (358)
Total allowance for loan losses 1,479 2,167 869
Reserve For Unfunded Credit Commitments [Roll Forward]      
Reserve for unfunded credit commitments, beginning of year 126 45 51
Provision (credit) for unfunded credit losses (31) 18 (6)
Reserve for unfunded credit commitments, end of year 95 126 45
Allowance for Credit Losses, end of period 1,574 2,293 914
UnfundedcreditcommitmentsChangeinAccountingGuidance     63
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL     108
Portion of ending allowance for loan losses:      
Individually evaluated for impairment     153
Collectively evaluated for impairment     716
Total allowance for loan losses 1,479 2,167 869
Portion of loan portfolio ending balance:      
Individually evaluated for impairment     952
Collectively evaluated for impairment     82,011
Loans, net of unearned income 87,784 [1] 85,266 [1] 82,963
Commercial Portfolio Segment [Member]      
Allowance for Loan and Lease Losses [Roll Forward]      
Allowance for loan losses, beginning of period 1,196 537 520
Cumulative change in accounting guidance   (3)  
Allowance for loan losses, beginning of period as adjusted for CECL   534  
Provision (credit) for loan losses (445) 927 138
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase 0 60  
Loan Losses:      
Charge-offs (128) (368) (150)
Recoveries 59 43 29
Net loan losses (69) (325) (121)
Total allowance for loan losses 682 1,196 537
Reserve For Unfunded Credit Commitments [Roll Forward]      
Reserve for unfunded credit commitments, beginning of year 97 41 47
Provision (credit) for unfunded credit losses (39) 20 (6)
Reserve for unfunded credit commitments, end of year 58 97 41
Allowance for Credit Losses, end of period 740 1,293 578
UnfundedcreditcommitmentsChangeinAccountingGuidance     36
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL     77
Portion of ending allowance for loan losses:      
Individually evaluated for impairment     120
Collectively evaluated for impairment     417
Total allowance for loan losses 682 1,196 537
Portion of loan portfolio ending balance:      
Individually evaluated for impairment     537
Collectively evaluated for impairment     45,302
Loans, net of unearned income 49,309 48,575 45,839
Total Investor Real Estate [Member]      
Allowance for Loan and Lease Losses [Roll Forward]      
Allowance for loan losses, beginning of period 183 45 58
Cumulative change in accounting guidance   7  
Allowance for loan losses, beginning of period as adjusted for CECL   52  
Provision (credit) for loan losses (87) 129 (16)
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase 0 0  
Loan Losses:      
Charge-offs (20) (1) (1)
Recoveries 3 3 4
Net loan losses (17) 2 3
Total allowance for loan losses 79 183 45
Reserve For Unfunded Credit Commitments [Roll Forward]      
Reserve for unfunded credit commitments, beginning of year 14 4 4
Provision (credit) for unfunded credit losses (6) (3) 0
Reserve for unfunded credit commitments, end of year 8 14 4
Allowance for Credit Losses, end of period 87 197 49
UnfundedcreditcommitmentsChangeinAccountingGuidance     13
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL     17
Portion of ending allowance for loan losses:      
Individually evaluated for impairment     4
Collectively evaluated for impairment     41
Total allowance for loan losses 79 183 45
Portion of loan portfolio ending balance:      
Individually evaluated for impairment     34
Collectively evaluated for impairment     6,523
Loans, net of unearned income 7,027 7,263 6,557
Consumer Portfolio Segment [Member]      
Allowance for Loan and Lease Losses [Roll Forward]      
Allowance for loan losses, beginning of period 788 287 262
Cumulative change in accounting guidance   434  
Allowance for loan losses, beginning of period as adjusted for CECL   721  
Provision (credit) for loan losses 39 256 265
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase 9 0  
Loan Losses:      
Charge-offs (180) (244) (292)
Recoveries 62 55 52
Net loan losses (118) (189) (240)
Total allowance for loan losses 718 788 287
Reserve For Unfunded Credit Commitments [Roll Forward]      
Reserve for unfunded credit commitments, beginning of year 15 0 0
Provision (credit) for unfunded credit losses 14 1 0
Reserve for unfunded credit commitments, end of year 29 15 0
Allowance for Credit Losses, end of period 747 803 287
UnfundedcreditcommitmentsChangeinAccountingGuidance     14
Reserve For Unfunded Credit Commitments Beginning Balance as adjusted for CECL     14
Portion of ending allowance for loan losses:      
Individually evaluated for impairment     29
Collectively evaluated for impairment     258
Total allowance for loan losses 718 788 287
Portion of loan portfolio ending balance:      
Individually evaluated for impairment     381
Collectively evaluated for impairment     30,186
Loans, net of unearned income $ 31,448 $ 29,428 $ 30,567
[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.