v3.26.1
Investments - AFS Securities with Cost Basis in Excess of Fair Value - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]      
Available-for-sale fixed-maturities with cost basis in excess of fair values, cost basis $ 2,559.4   $ 2,074.3
Allowance for credit losses 0.0   $ 0.7
Available-for-sale credit (gains) losses $ 0.0 $ 0.0