Lease Disclosures Payment for Leases (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Leases [Abstract]
Principal payments on finance lease obligations	$ 3.0	$ 3.5	$ 6.0	$ 7.0
Interest payments on finance lease obligations	1.6	2.0	3.4	4.1
Payments on operating leases	23.0	22.8	46.5	45.8
Variable lease payments	$ 0.2	$ 0.6	$ 0.5	$ 1.5