v3.26.1
Long-Duration Insurance Contracts - Market Risk Benefits by Asset and Liability Balance (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Market Risk Benefit [Line Items]            
Net $ (11.1) $ (6.2) $ (9.0) $ (6.7) $ (5.2) $ (6.8)
Deferred variable annuities            
Market Risk Benefit [Line Items]            
(Asset) (12.1)   (10.3)      
Liability 1.0   1.3      
Net $ (11.1)   $ (9.0)