ACQUISITION (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Mar. 31, 2022
Business Acquisition [Line Items]
Goodwill	$ 2,815.7	$ 2,808.8
Midwest- Based Regulated Waste Business
Business Acquisition [Line Items]
Material acquisition, consideration	43.4
Goodwill	$ 22.0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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