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Debt - Junior Convertible Securities (Details)
$ / shares in Units, $ in Millions
 6 Months Ended
Jun. 30, 2025
USD ($)
d
$ / shares
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]    
Debt $ 2,621.2 $ 2,620.2
Junior convertible securities    
Debt Instrument [Line Items]    
Debt 339.2 339.1
Junior Convertible Trust Preferred Securities | Junior convertible securities    
Debt Instrument [Line Items]    
Debt $ 341.7  
Debt interest rate 5.15%  
Unamortized debt issuance costs $ 2.6 $ 2.7
Conversion ratio per share of common stock 0.2558  
Face amount of convertible security (in dollars per share) | $ / shares $ 50.00  
Adjusted conversion price (in dollars per share) | $ / shares $ 195.47  
Convertible debt, threshold trading days | d 20  
Convertible debt, threshold consecutive trading days | d 30  
Debt instrument, convertible, threshold percentage 1.30