INCOME TAXES - Reconciliation of Tax Expense to Statutory Federal Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Computed income tax benefit	$ (42.1)	$ (96.6)
State and local taxes, net of U.S. federal income tax benefit	0.2	1.8
Foreign rate differential and other foreign adjustments	7.9	23.8
Net establishment of valuation allowance	25.2	193.7
Net establishment of uncertain tax positions	4.8	4.4
Foreign dividends and earnings taxable in the U.S.	6.2	7.9
Impairment for which there is no tax benefit	0.0	17.0
Other	4.0	6.8
Total provision for income taxes	$ 6.2	$ 158.8