Leases Lease, Cost (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) Rate
Leases [Abstract]
Operating Lease, Cost	$ 7.5
Sublease Income	0.4
Lease, Cost	7.1
Finance Lease, Principal Payments	$ 7.3
Operating Lease, Weighted Average Remaining Lease Term	7 years
Operating Lease, Weighted Average Discount Rate, Percent | Rate	4.68%