COMMITMENTS AND CONTINGENCIES - Schedule of Total Environmental Liabilities (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Total environmental liabilities	$ 3.5	$ 31.9
Accrued Liabilities
Loss Contingencies [Line Items]
Total environmental liabilities	2.1	4.7
Other Long-term Liabilities
Loss Contingencies [Line Items]
Total environmental liabilities	$ 1.4	$ 27.2