Leases, Schedule of Lease Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease assets	$ 27.4	$ 0.0
Finance lease assets	6.7
Total lease assets	34.1
Operating lease liabilities, current	3.5
Finance lease liabilities, current	1.3
Operating lease liabilities, noncurrent	26.6	$ 0.0
Finance lease liabilities, noncurrent	5.4
Total lease liabilities	$ 36.8