Goodwill and Intangible Assets - Amortization Expense (Details) $ in Millions	Mar. 31, 2019 USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2019 (remaining)	$ 92.8
2020	123.7
2021	123.7
2022	123.7
2023	123.6
Thereafter	755.2
Total	$ 1,342.7