Quarterly report pursuant to Section 13 or 15(d)

ALLOWANCE FOR CREDIT LOSSES - Narrative (Details)

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ALLOWANCE FOR CREDIT LOSSES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]      
ACL balance, end of period $ 2,415   $ 2,299
ACL, period increase (decrease) 15    
Commercial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
ACL balance, end of period 1,658 $ 1,600 1,532
ACL, period increase (decrease) 29    
Consumer      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
ACL balance, end of period $ 757 $ 771 $ 767