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Goodwill and Intangible Assets - Government Grants (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Finite-lived and Indefinite-lived Intangible Assets    
Gross carrying amount $ 505.7 $ 333.1
Government grants    
Finite-lived and Indefinite-lived Intangible Assets    
Gross carrying amount 7.7 8.2
Government grants | Current    
Finite-lived and Indefinite-lived Intangible Assets    
Gross carrying amount 0.5 0.5
Government grants | Long-term    
Finite-lived and Indefinite-lived Intangible Assets    
Gross carrying amount $ 7.2 $ 7.7