v3.26.1
Derivative Financial Instruments - Net Investment Hedges (Details) - Net investment hedging relationships - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 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 $ (0.4) $ (2.5) $ (0.1) $ (3.6)
Amount of gains (loss) reclassified from AOCI into net realized capital gains (losses) (0.2)   (0.2)  
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 (0.4) $ (2.5) (0.1) $ (3.6)
Amount of gains (loss) reclassified from AOCI into net realized capital gains (losses) $ (0.2)   $ (0.2)