Income Tax Matters, Provision Table (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Tax Provision
Domestic	$ 7.5	$ 1.9	$ 13.1	$ 20.1
Foreign	0.3	0.3	0.6	0.6
Total	$ 7.8	$ 2.2	$ 13.7	$ 20.7