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ACCUMULATED OTHER COMPREHENSIVE INCOME (Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Prior service cost |
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, before tax | $ 0.4
Recognized actuarial loss |
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, before tax | (16.8)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent |
Amortization of pension and other postretirement plan items: |
Total net periodic benefit cost, before tax | (16.4)
Total net periodic benefit cost, tax benefit | 4.0
Total net periodic benefit cost, net of tax | $ (12.4)

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