INCOME TAXES (Schedule of Components of Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Current Federal Tax Expense (Benefit)	$ (0.7)	$ (0.5)	$ (252.6)
Current State and Local Tax Expense (Benefit)	0.1	0.0	(0.1)
Current Foreign Tax Expense (Benefit)	0.2	0.7	0.3
Current Income Tax Expense (Benefit)	(0.4)	0.2	(252.4)
Deferred Federal Income Tax Expense (Benefit)	18.0	(475.4)	0.0
Income Tax Expense (Benefit)	$ 17.6	$ (475.2)	$ (252.4)