Leases (Assets and Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Leases [Abstract]
Finance Lease, Right-Of-Use Asset, Accumulated Depreciation	$ 17.2
Lease Assets
Operating ROU assets	203.3	$ 0.0
Finance lease assets	16.1
Total leased assets	219.4
Current:
Operating	42.5
Finance	3.9
Noncurrent:
Operating	163.3	$ 0.0
Finance	9.6
Total leased liabilities	$ 219.3