ACCRUED LIABILITIES - Schedule of Accrued Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Payables And Accruals [Abstract]
Accrued compensation	$ 52.0	$ 64.6
Accrued self-insurance	77.9	53.6
Accrued taxes	41.2	18.3
Accrued interest	13.6	14.1
Accrued small quantity customer class action legal settlement (see Note 18 – Legal Proceedings)	295.0	0.0
Accrued professional services liabilities	34.3	10.1
Accrued disposal and landfill liabilities	13.2	13.0
Accrued liabilities - other	60.9	54.8
Total accrued liabilities	$ 588.1	$ 228.5