Quarterly report pursuant to Section 13 or 15(d)

ALLOWANCE FOR CREDIT LOSSES - Allowance Roll-forward (Details)

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ALLOWANCE FOR CREDIT LOSSES - Allowance Roll-forward (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
ALLL balance, beginning of period $ 2,121 $ 2,030  
Loan and lease charge-offs (99) (81)  
Recoveries of loans and leases previously charged-off 42 62  
Provision for loan and lease losses 78 7  
ALLL balance, end of period 2,142 2,018  
AULC balance, beginning of period 150 77  
Provision (reduction in allowance) for unfunded loan commitments 7 14  
AULC balance, end of period 157 91  
ACL balance, end of period 2,299 2,109  
Commercial      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
ALLL balance, beginning of period 1,424 1,462  
Loan and lease charge-offs (52) (31)  
Recoveries of loans and leases previously charged-off 23 40  
Provision for loan and lease losses 62 43  
ALLL balance, end of period 1,457 1,514  
AULC balance, beginning of period 71 41  
Provision (reduction in allowance) for unfunded loan commitments 4 16  
AULC balance, end of period 75 57  
ACL balance, end of period 1,532 1,571 $ 1,500
Consumer      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
ALLL balance, beginning of period 697 568  
Loan and lease charge-offs (47) (50)  
Recoveries of loans and leases previously charged-off 19 22  
Provision for loan and lease losses 16 (36)  
ALLL balance, end of period 685 504  
AULC balance, beginning of period 79 36  
Provision (reduction in allowance) for unfunded loan commitments 3 (2)  
AULC balance, end of period 82 34  
ACL balance, end of period $ 767 $ 538 $ 776