Lease Accounting (Leases Reflected on Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets
Operating leases right of use assets	$ 124.2
Finance	3.0	$ 2.9
Total leased assets	127.2	2.9
Accumulated depreciation	2.2	1.8
Current
Operating	6.8
Finance	1.2
Finance		1.2
Noncurrent
Operating	118.5
Finance	1.2
Finance		1.1
Total lease liabilities	$ 127.7	$ 2.3