INCOME TAXES Income Taxes (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) subsidiary	Mar. 31, 2020 USD ($)
Income Tax Disclosure [Abstract]
Number Of Subsidiaries Acquired | subsidiary	2
Current income tax benefit	$ (1.2)	$ 0.0
Deferred income tax (benefit) expense	(9.4)	14.2
Total income tax (benefit) expense	$ (10.6)	$ 14.2