v3.26.3
Fair Value Measurements (Financial Instruments Recorded at Fair Value) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Cash and cash equivalents $ 2,236.1 $ 1,957.2
Deferred compensation asset 0.6 0.5
Deferred compensation obligation 0.6 0.5
Equity related compensation 15.1 0.0
Warrant Liability, Fair Value 220.4 0.0
0.0 Percent Convertible Note    
Debt Issuance Costs, Net 19.0 21.3
Fair Value, Inputs, Level 1 [Member]    
Deferred compensation asset 0.6 0.5
Deferred compensation obligation 0.6 0.5
Equity related compensation 15.1 0.0
Warrant Liability, Fair Value 0.0 0.0
Fair Value, Inputs, Level 2 [Member]    
Cash and cash equivalents 0.0 0.0
Deferred compensation asset 0.0 0.0
Deferred compensation obligation 0.0 0.0
Equity related compensation 0.0 0.0
Warrant Liability, Fair Value 0.0 0.0
Fair Value, Inputs, Level 3 [Member]    
Cash and cash equivalents 0.0 0.0
Deferred compensation asset 0.0 0.0
Deferred compensation obligation 0.0 0.0
Equity related compensation 0.0 0.0
Warrant Liability, Fair Value $ 220.4 $ 0.0