SEGMENT REPORTING - Reconciliation of Company's Primary Measure of Segment Profitability (EBITDA) to Loss from Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting [Abstract]
Total Reportable Segment Adjusted Income from Operations	$ 352.4	$ 388.6	$ 452.0
Intangible amortization	(117.9)	(124.9)	(145.2)
ERP Implementation	(59.0)	(50.8)	(67.7)
Operational Optimization	0.0	(3.1)	(14.5)
Portfolio Optimization	(3.3)	(133.0)	(118.2)
Litigation, Settlements and Regulatory Compliance	(93.2)	(20.3)	(28.2)
Asset Impairments	(6.7)	(15.5)	(22.1)
Other	0.0	(9.1)	(39.7)
Income (loss) from operations	72.3	31.9	(211.9)
Goodwill impairment	$ 0.0	$ 0.0	$ (228.3)