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Goodwill and Intangible Assets - Schedule of Balances of Acquired Intangible Assets, Excluding Goodwill (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 221.9 $ 197.4
Accumulated amortization (166.0) (138.7)
Carrying value 55.9 58.7
Customer Lists    
Finite-Lived Intangible Assets [Line Items]    
Original cost 174.4 154.6
Accumulated amortization (125.3) (104.9)
Carrying value $ 49.1 $ 49.7
Weighted average original life (in years) 15 years 15 years
Trade Names    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 31.0 $ 27.6
Accumulated amortization (25.8) (20.8)
Carrying value $ 5.2 $ 6.8
Weighted average original life (in years) 11 years 11 years
Technology    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 16.5 $ 15.2
Accumulated amortization (14.9) (13.0)
Carrying value $ 1.6 $ 2.2
Weighted average original life (in years) 11 years 11 years