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		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting [Abstract]
Total Reportable Segment Adjusted Income from Operations	$ 72.5	$ 101.0	$ 288.2	$ 280.1
ERP Implementation	(14.6)	(10.7)	(49.8)	(37.9)
Intangible Amortization	(29.2)	(31.4)	(89.1)	(94.5)
Operational Optimization	0.0	(3.1)	0.0	(3.1)
Divestitures (including Divestiture (losses) gains, net)	(12.2)	(105.4)	(13.8)	(172.9)
Litigation, Settlements and Regulatory Compliance	(67.1)	(3.5)	(71.4)	(12.1)
Asset Impairments	0.0	(0.6)	0.0	(12.9)
Other	0.0	(2.1)	0.0	(8.0)
(Loss) income from operations	$ (50.6)	$ (55.8)	$ 64.1	$ (61.3)