Leases Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Lease, Cost	$ 14.9	$ 18.4
Short-term Lease, Cost	0.2	3.4
Operating Lease, Expense	15.1	21.8
Finance Lease, Interest Expense	0.9	0.9
Finance Lease, Right-of-Use Asset, Amortization	2.2	2.2
Finance Lease, Expense	3.1	3.1
Sublease Income	$ 3.6	$ 3.3