Quarterly report [Sections 13 or 15(d)]

FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Non-Recurring Basis (Details) - Nonrecurring Basis - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Total Gains/(Losses)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral-dependent loans, gains (losses) $ (23) $ (25)  
Level 3 | Fair Value      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Collateral-dependent loans $ 61   $ 192