Income Taxes - Schedule of Current and Deferred Income Tax Expense (Benefit) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Current, U.S. Federal	$ (0.3)	$ 0.0	$ 0.1
Current, State & Local	0.7	0.9	0.2
Current, Foreign	2.5	1.9	1.5
Current Income Tax Expense (Benefit)	2.9	2.8	1.8
Deferred
Deferred, U. S. Federal	(2.2)	(10.3)	32.4
Deferred, State & Local	(0.9)	(2.6)	(2.3)
Deferred, Foreign	(2.0)	(1.3)	(0.4)
Deferred Income Tax Expense (Benefit)	(5.1)	(14.2)	29.7
Total
Total U. S. Federal Current and Deferred Income Tax Expense (Benefit)	(2.5)	(10.3)	32.5
Total State & Local Current and Deferred Income Tax Expense (Benefit)	(0.2)	(1.7)	(2.1)
Total Foreign Current and Deferred Income Tax Expense (Benefit)	0.5	0.6	1.1
Total Current and Deferred Income Tax Expense (Benefit)	$ (2.2)	$ (11.4)	$ 31.5