Quarterly report [Sections 13 or 15(d)]

FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option-Changes in Fair Value (Details)

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FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option-Changes in Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Net gains (losses) from fair value changes $ 6 $ (7)
Loans held for investment | Fair Value, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Net gains (losses) from fair value changes (1) (1)
Long-term debt | Fair Value, Recurring    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Net gains (losses) from fair value changes $ (1) $ 0