Leases - Supplemental Cash Flow and Other Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Jun. 30, 2018
Supplemental Cash Flow and Other Information [Line Items]
Operating Lease, Weighted Average Remaining Lease Term	6 years 10 months 15 days	6 years 10 months 15 days
Finance Lease, Weighted Average Remaining Lease Term	9 years 9 months 15 days	9 years 9 months 15 days
Operating Lease, Payments	$ 108.4
Finance Lease, Interest Payment on Liability		$ 0.2
Payments on financing leases		0.2
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability		$ 999.5	$ 0.0
Operating Lease, Weighted Average Discount Rate, Percent	8.13%	8.13%
Finance Lease, Weighted Average Discount Rate, Percent	6.83%	6.83%
Adjustments for New Accounting Pronouncement [Member]
Supplemental Cash Flow and Other Information [Line Items]
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 160.1