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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 6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2016
Pension Plans, Defined Benefit [Member] Ìý Ìý Ìý Ìý Ìý
Definted Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý Ìý Ìý
Reduction in other postretirement benefit expense $ (2.1) Ìý $ (4.2) Ìý Ìý
Total service and interest costs for other post retirement benefit plans 12.0 Ìý 23.9 Ìý Ìý
Pension Contributions 0.3 $ 0.3 0.3 $ 4.2 Ìý
Other Postretirement Benefit Plans, Defined Benefit [Member] Ìý Ìý Ìý Ìý Ìý
Definted Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý Ìý Ìý
Reduction in other postretirement benefit expense (0.6) Ìý (1.1) Ìý Ìý
Total service and interest costs for other post retirement benefit plans 2.7 Ìý 5.4 Ìý Ìý
Other Postretirement Benefit Expense $ 0.0 $ 0.0 $ 0.0 $ 0.0 Ìý
Scenario, Forecast [Member] | Pension Plans, Defined Benefit [Member] Ìý Ìý Ìý Ìý Ìý
Definted Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý Ìý Ìý
Reduction in net periodic benefit expense Ìý Ìý Ìý Ìý $ 8.4
Reduction in other postretirement benefit expense Ìý Ìý Ìý Ìý $ 2.3