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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 280.0 $ 276.0
Indefinite-lived other intangible asset 4.4 4.3
Total other intangible assets, gross carrying amount 284.4 280.3
Accumulated Amortization 166.7 156.4
Net Carrying Amount 113.3 119.6
Total other intangible assets, net carrying amount 117.7 123.9
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 180.5 177.9
Accumulated Amortization 96.0 90.0
Net Carrying Amount 84.5 87.9
Technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 78.1 77.4
Accumulated Amortization 61.7 58.1
Net Carrying Amount 16.4 19.3
Trademarks and trade names    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 20.1 19.4
Accumulated Amortization 7.8 7.4
Net Carrying Amount 12.3 12.0
Covenants not to compete    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 1.3 1.3
Accumulated Amortization 1.2 0.9
Net Carrying Amount $ 0.1 $ 0.4