Leases Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Fixed operating lease cost	$ 16.6	$ 17.7
Short-term Operating Lease Cost	2.7	2.0
Variable Operating Lease Cost	0.9	1.1
Finance Lease Amortization of ROU Asset	0.1	0.3
Interest on lease liabilities	0.1	1.0
Total Lease Cost	20.4	$ 22.1
LVT Variable Operating Costs	$ 0.8