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
Mar. 31, 2021	Mar. 31, 2020
Segment Reporting [Abstract]
Total Reportable Segment Adjusted Income from Operations	$ 110.0	$ 93.8
ERP Implementation	(17.9)	(18.0)
Intangible Amortization	(29.8)	(31.9)
Divestitures (including Divestiture (losses) gains, net)	(1.2)	(61.3)
Litigation, Settlements and Regulatory Compliance	(2.0)	(4.4)
Asset Impairments	0.0	(4.0)
Other	0.0	(4.6)
Income (loss) from operations	$ 59.1	$ (30.4)

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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