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Goodwill and Intangible Assets - Intangible Assets Other Than Goodwill and Trade Names (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Finite Lived Intangible Assets [Line Items]    
Intangible assets, net of accumulated amortization $ 3,132.9 $ 3,218.5
Intellectual property, patents, non-compete and other intangibles    
Finite Lived Intangible Assets [Line Items]    
Intangible assets, accumulated amortization 301.1 223.7
Intangible assets, net of accumulated amortization 988.6 1,007.6
Backlog    
Finite Lived Intangible Assets [Line Items]    
Intangible assets, accumulated amortization 285.5 206.9
Intangible assets, net of accumulated amortization 1,142.7 1,224.7
Customer Relationships    
Finite Lived Intangible Assets [Line Items]    
Intangible assets, accumulated amortization 319.3 276.3
Intangible assets, net of accumulated amortization $ 1,001.6 $ 986.2