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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting [Abstract]
Total Reportable Segment Adjusted Income from Operations	$ 82.0	$ 105.7	$ 141.0	$ 215.7
ERP Implementation	(3.5)	(17.3)	(9.1)	(35.2)
Intangible Amortization	(30.8)	(30.1)	(63.2)	(59.9)
Portfolio Optimization	0.0	(0.4)	(1.3)	(1.6)
Litigation, Settlements and Regulatory Compliance	(9.6)	(2.3)	(23.4)	(4.3)
Income from operations	$ 38.1	$ 55.6	$ 44.0	$ 114.7