SEGMENT REPORTING - Reconciliation of Company's Primary Measure of Segment Profitability Adjusted Income from Operations to Income (loss) from Operations (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting [Abstract]
Total Reportable Segment Adjusted Income from Operations	$ 105.7	$ 85.3	$ 215.7	$ 179.1
ERP Implementation	(17.3)	(9.2)	(35.2)	(27.2)
Intangible Amortization	(30.1)	(31.2)	(59.9)	(63.1)
Divestitures (including Divestiture (losses) gains, net)	(0.4)	(6.2)	(1.6)	(67.5)
Litigation, Settlements and Regulatory Compliance	(2.3)	(4.2)	(4.3)	(8.6)
Asset Impairments	0.0	(8.3)	0.0	(12.3)
Other	0.0	(1.3)	0.0	(5.9)
Income (loss) from operations	$ 55.6	$ 24.9	$ 114.7	$ (5.5)