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Intangible Assets, Net - Schedule of Future Amortization Expense (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense $ 6.1 $ 10.5 $ 17.3
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]      
2019 4.7    
2020 3.8    
2021 1.5    
2022 0.8    
2023 0.8    
Thereafter 3.1    
Total $ 14.7