Leases Lease Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Lease, Cost	$ 16.4	$ 18.9	$ 31.3	$ 37.3
Short-term Lease, Cost	0.5	1.5	0.7	4.9
Operating Lease, Expense	16.9	20.4	32.0	42.2
Finance Lease, Interest Expense	0.8	0.9	1.7	1.8
Finance Lease, Right-of-Use Asset, Amortization	2.1	2.4	4.3	4.6
Finance Lease, Expense	2.9	3.3	6.0	6.4
Sublease Income	$ 3.1	$ 1.7	$ 6.7	$ 5.3