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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) site proceeding claim | Dec. 31, 2012 CAD ($) | Dec. 31, 1999 municipality | Dec. 31, 1968 permit | Dec. 31, 2020 USD ($) proceeding
Loss Contingencies [Line Items] |  |  |  |  |
Recorded reserves for actual or probable liabilities | $ | $ 30,200,000 |  |  |  | $ 29,800,000
Number of proceedings as defendant | proceeding | 69 |  |  |  |
Number of product liability claims settled or dismissed | claim | 5 |  |  |  |
Legal and Administrative Proceedings |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Recorded reserves for actual or probable liabilities | $ | $ 23,900,000 |  |  |  | 24,000,000
Ville Mercier |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of permits issued by government, for dumping organic liquid | permit |  |  |  | 2 |
Number of neighboring municipalities filing separate legal proceedings against the Mercier Subsidiary and the Government of Quebec | municipality |  |  | 3 |  |
General damages sought | $ |  | $ 2.9 |  |  |
Punitive damages sought | $ |  | $ 10.0 |  |  |
Superfund Proceedings |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Number of sites owned by third party excluded from cleanup or related liabilities | 130 |  |  |  |
Number of sites owned by the entity subject to proceedings under federal or state superfund laws | 5 |  |  |  |
Number of sites owned by third parties | 125 |  |  |  |
Number of sites for which environmental remediation expense is settled | 31 |  |  |  |
Third party sites requiring expenditure on remediation | 15 |  |  |  |
Number of sites not currently requiring expenditures on remediation | 79 |  |  |  |
Minimum potential liability | $ | $ 1,000,000.0 |  |  |  |
Number of sites, potential liability exceeds substantial quota | 3 |  |  |  |
Notices received from owners of third parties sites seeking indemnifications from the company | 17 |  |  |  |
BR Facility | Remedial Liabilities for Inactive Sites |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Increase of remedial liabilities | $ | $ 3,300,000 |  |  |  |
ChemWaste |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Indemnification agreement with third party sites | 11 |  |  |  |
Kleen Performance Products |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Notices received from owners of third parties sites seeking indemnifications from the company | 6 |  |  |  |
Federal and State Enforcement Actions |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Recorded reserves for actual or probable liabilities | $ | $ 6,300,000 |  |  |  | $ 5,800,000
Number of proceedings as defendant | proceeding | 0 |  |  |  | 0
Minimum potential liability | $ | $ 1,000,000.0 |  |  |  | $ 1,000,000.0

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