INCOME TAXES - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2020	Jul. 31, 2020	Dec. 31, 2017	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Increase in valuation allowance				$ 12.6
Tax benefit from net operating losses carry back				44.4
Income taxes receivable, net operating loss, CARES Act	$ 64.2
Proceeds from income tax refunds, CARES Act	62.0	$ 48.0
Unrecognized tax benefits, interest on income tax expense, CARES Act	2.2
Tax cuts and jobs act, income tax expense (benefit)			$ (129.8)				$ (129.8)
Net charge to income tax provision						$ 8.8
Net operating loss carry-forwards	161.9			161.9
Tax benefit of net operating losses	49.0			49.0	$ 116.2
Valuation allowance for net operating losses	25.3			25.3
Unrecognized tax benefit	24.3			24.3	62.7	64.7
Uncertain tax positions that, if recognized, would affect the effective tax rate	23.2			23.2
Interest and penalties recognized related to income tax reserves				(1.5)	$ (0.7)	$ 0.8
Internal Revenue Service | Tax Year 2019
Income Tax Contingency [Line Items]
Refund adjustment from settlement with taxing authority	1.0			1.0
Minimum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	5.0			5.0
Maximum
Income Tax Contingency [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 10.0			$ 10.0