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FAIR VALUE OF FINANCIAL INSTRUMENTS - Narrative (Details) - Level 3 - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Unrealized appreciation (depreciation) on investments $ 128 $ 366 $ 128 $ 366
Net unrealized gains (losses) $ (8) $ 39 $ (57) $ 126