Leases - Supplemental Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Leases [Abstract]
Operating cash flows from operating leases	$ 0.0
Operating cash flows from finance leases	(3.0)
Financing cash flows from finance leases	$ (1.0)	$ 0.0
Weighted-average remaining lease term - operating leases	20 years
Weighted-average remaining lease term - finance leases	12 years
Weighted-average discount rate - operating leases	5.80%
Weighted-average discount rate - finance leases	14.30%