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RESTRUCTURING CHARGES (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2021
Selling, General and Administrative Expenses |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | $ 31.9 |  |
Restructuring charges, net of tax |  | $ 24.3 |  |
Restructuring Charges Incurred In 2020 |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Payments for restructuring | $ 4.3 |  | $ 21.5 | $ 25.5

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