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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Reclassifications Out of Accumulated Other Comprehensive Loss (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Amounts reclassified from accumulated other comprehensive income (loss) | $ 3.7
Prior service cost |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Total net periodic benefit cost, before tax | (0.1)
Recognized actuarial loss |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Total net periodic benefit cost, before tax | 5.1
Pension and other postretirement benefit plans |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Total net periodic benefit cost, before tax | 5.0
Total net periodic benefit cost, tax benefit | (1.3)
Amounts reclassified from accumulated other comprehensive income (loss) | $ 3.7

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