Quarterly report [Sections 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 12 Months Ended
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]      
ACL balance, end of period $ 2,478   $ 2,415
ACL, period increase (decrease) 32    
Commercial      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
ACL balance, end of period 1,678   1,658
ACL, period increase (decrease)   $ 50  
Consumer      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
ACL balance, end of period $ 800   $ 757
ACL, period increase (decrease)   $ (17)