v3.26.1
FAIR VALUES OF ASSETS AND LIABILITIES - Fair Value Option-Changes in Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Loans held for sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Net gains (losses) from fair value changes $ (8) $ 6
Loans held for investment    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Net gains (losses) from fair value changes 1 (1)
Unsecured debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Net gains (losses) from fair value changes $ 9 $ (1)