Summary of Minimum Annual Rentals Including Reasonably Assured Renewal Options under Lease Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases
2019	$ 17.3
2020	21.0
2021	18.5
2022	17.2
2023	11.1
2024 and thereafter	65.7
Total future minimum lease commitments	150.8
Less: Imputed Interest	(37.1)
Present value of lease liabilities	$ 113.7	$ 109.0	$ 57.0