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EMPLOYEE BENEFIT PLANS - Other Benefits (Details) - Phantom Share Units (PSUs) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Defined Benefit Plan Disclosure |
Other Deferred Compensation Arrangements, Liability, Classified, Noncurrent | $ 22.8
Share-based Payment Arrangement, Expense | $ 9.2

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- Details
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