Leases - Future Minimum Lease Payments (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Remainder of 2019	$ 45.4
2020	55.0
2021	47.5
2022	35.9
2023	29.3
Thereafter	95.5
Total operating lease payments	308.6
Less: Imputed interest	29.4
Total operating lease liabilities	$ 279.2