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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassifications Out Of Accumulated Other Comprehensive Income (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($)
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, net of tax | $ (12.1)
Prior service cost |
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, before tax | (0.5)
Recognized actuarial loss |
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, before tax | 16.5
Accumulated Defined Benefit Plans Adjustment Attributable to Parent |
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, before tax | 16.0
Total net periodic benefit cost, tax benefit | (3.9)
Total net periodic benefit cost, net of tax | $ 12.1

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