v3.26.1
Investments Textuals (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]          
Equity Securities, FV-NI, Unrealized Gain (Loss) $ 134.2 $ (4.9) $ 250.7 $ 12.7  
Net Unrealized Gains Losses Recognized from Changes in Fair Value of Equity Securities Held 162.2 $ 0.6 337.4 $ 61.2  
Debt Securities, Available-for-sale, Allowance for Credit Loss $ 1.6   $ 1.6   $ 1.6