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, 2022	Mar. 31, 2021
Segment Reporting [Abstract]
Total Reportable Segment Adjusted Income from Operations	$ 59.0	$ 110.0
ERP Implementation	(5.6)	(17.9)
Intangible Amortization	(32.4)	(29.8)
Portfolio Optimization	(1.3)	(1.2)
Litigation, Settlements and Regulatory Compliance	(13.8)	(2.0)
Income from operations	$ 5.9	$ 59.1

The net result for the period of deducting operating expenses from operating revenues.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration