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EMPLOYEE BENEFIT PLANS - Costs Recognized Under Defined Contribution Plans and Multiemployer Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Multi-employer pension and health & welfare plans	$ 0.2	$ 0.9	$ 1.0
401(k) savings and other defined contribution plans	54.6	55.7	27.9
Total	$ 54.8	$ 56.6	$ 28.9

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- References

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- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

Cost recognized for 401(k) savings and other defined contribution plans under Defined Contribution Plans and Multiemployer Pension Plan

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- Definition

Multiemployer Plan, Cost

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