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Goodwill and Intangible Assets - Schedule of Balances of Acquired Intangible Assets, Excluding Goodwill (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 204.5 $ 196.2
Accumulated amortization (137.0) (133.1)
Carrying value 67.5 63.1
Customer Lists    
Finite-Lived Intangible Assets [Line Items]    
Original cost 159.8 150.6
Accumulated amortization (103.5) (100.8)
Carrying value $ 56.3 $ 49.8
Weighted average original life (in years) 14 years 15 years
Trade Names    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 28.5 $ 29.3
Accumulated amortization (20.1) (19.2)
Carrying value $ 8.4 $ 10.1
Weighted average original life (in years) 10 years 11 years
Technology    
Finite-Lived Intangible Assets [Line Items]    
Original cost $ 16.2 $ 16.3
Accumulated amortization (13.4) (13.1)
Carrying value $ 2.8 $ 3.2
Weighted average original life (in years) 12 years 11 years