FAIR VALUE MEASUREMENTS - Changes to Contingent Consideration (Detail) - Contingent Consideration Liability - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2018	Dec. 31, 2017
Business Combination, Contingent Consideration, Liability [Roll Forward]
Contingent consideration, Beginning Balance	$ 12.4	$ 24.1
Increase due to current year acquisitions		0.1
Purchase accounting adjustments	(0.4)	(9.6)
Decrease due to payments		(1.5)
Change in fair value reflected in Selling, general, and administrative expenses	0.5	(0.4)
Other		(0.3)
Contingent consideration, Ending Balance	$ 12.5	$ 12.4

Business combination, contingent consideration, liability roll forward.

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- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis changes in fair value of liability.

+ References

No definition available.

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- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis other.

+ References

No definition available.

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- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis purchase accounting adjustments.

+ References

No definition available.

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- Definition

Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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