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FAIR VALUES OF FINANCIAL INSTRUMENTS - Fair Value Level Disclosure (Details) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Assets disclosed at fair value    
Investment securities $ 223 $ 217
Total assets measured at fair value 223 217
Level 1    
Assets disclosed at fair value    
Investment securities 49 47
Total assets measured at fair value 49 47
Level 2    
Assets disclosed at fair value    
Investment securities 174 170
Total assets measured at fair value 174 170
Level 3    
Assets disclosed at fair value    
Investment securities 0 0
Total assets measured at fair value $ 0 $ 0