Leases Lease, Cost (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($) Rate	Jun. 30, 2019 USD ($) Rate
Lease, Cost [Abstract]
Operating Lease, Cost	$ 7.1	$ 14.6
Sublease Income	(0.4)	(0.8)
Lease, Cost	6.7	13.8
Finance Lease, Principal Payments	$ 7.3	$ 14.6
Operating Lease, Weighted Average Remaining Lease Term	7 years	7 years
Operating Lease, Weighted Average Discount Rate, Percent | Rate	4.68%	4.68%