v3.26.3
Marketable Securities and Fair Value Measurements (Details) - Level 2 - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost $ 472.1 $ 541.3
Gross Unrealized Gains 0.0 1.2
Gross Unrealized Losses (1.7) 0.0
Fair Value 470.4 542.5
Corporate bonds    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 429.6 528.0
Gross Unrealized Gains 0.0 1.1
Gross Unrealized Losses (1.5) 0.0
Fair Value 428.1 529.1
Government securities    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Amortized Cost 42.5 13.3
Gross Unrealized Gains 0.0 0.1
Gross Unrealized Losses (0.2) 0.0
Fair Value $ 42.3 $ 13.4