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Quarterly report pursuant to Section 13 or 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2016
Pension Plans, Defined Benefit [Member] Ìý Ìý Ìý
Definted Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý
Reduction in net periodic benefit expense $ 2.1 Ìý Ìý
Reduction in other postretirement benefit expense 0.6 Ìý Ìý
Defined Benefit Plan, Net Periodic Benefit Cost 12.0 Ìý Ìý
Pension Contributions 0.3 $ 3.9 Ìý
Other Postretirement Benefit Plans, Defined Benefit [Member] Ìý Ìý Ìý
Definted Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý
Total service and interest costs for other post retirement benefit plans 2.7 Ìý Ìý
Other Postretirement Benefit Expense $ 0.0 $ 0.0 Ìý
Scenario, Forecast [Member] | Pension Plans, Defined Benefit [Member] Ìý Ìý Ìý
Definted Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý
Reduction in net periodic benefit expense Ìý Ìý $ 8.4
Reduction in other postretirement benefit expense Ìý Ìý $ 2.3