COMMITMENTS AND CONTINGENCIES - Schedule of Total Environmental Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Loss Contingencies [Line Items]
Environmental remediation liabilities	$ 3.1	$ 31.9
Accrued liabilities
Loss Contingencies [Line Items]
Environmental remediation liabilities	3.1	4.7
Other long-term liabilities
Loss Contingencies [Line Items]
Environmental remediation liabilities	$ 0.0	$ 27.2

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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