v3.26.3
Derivative Financial Instruments - Net Investment Hedges (Details) - Net investment hedging relationships - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2026
Sep. 30, 2025
Effect of derivatives in hedging relationships and the related hedged items on the consolidated statements of operations      
Amount of gain (loss) recognized in AOCI on derivatives   $ (0.1) $ (3.6)
Amount of gain (loss) reclassified from AOCI into net realized capital gains (losses) $ (5.8) (6.0)  
Foreign exchange contracts      
Effect of derivatives in hedging relationships and the related hedged items on the consolidated statements of operations      
Amount of gain (loss) recognized in AOCI on derivatives   (0.1) $ (3.6)
Amount of gain (loss) reclassified from AOCI into net realized capital gains (losses) $ (5.8) $ (6.0)