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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 280.5 $ 270.6
Indefinite-lived other intangible asset, gross carrying amount 4.5 4.1
Total other intangible assets, gross carrying amount 285.0 274.7
Accumulated Impairment 4.5  
Accumulated Amortization 178.4 164.4
Net Carrying Amount 102.1 106.2
Indefinite-lived other intangible asset, net carrying amount 0.0 4.1
Total other intangible assets, net carrying amount 102.1 110.3
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 181.0 175.9
Accumulated Amortization 103.8 96.1
Net Carrying Amount 77.2 79.8
Technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 79.4 75.6
Accumulated Amortization 66.4 60.6
Net Carrying Amount 13.0 15.0
Trademarks and trade names    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 20.1 19.1
Accumulated Amortization 8.2 7.7
Net Carrying Amount $ 11.9 $ 11.4