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Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Annual Costs Related to Retirement Plans) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Annual Costs Related to Retirement Plans) (Details) - Pension Benefits [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items] Ìý Ìý Ìý
Defined benefit pension plans $ 18.0 $ 16.5 $ 23.9
Defined contribution pension plans 2.9 2.8 3.6
Other Postretirement Benefits Cost (Reversal of Cost) (6.1) (4.0) 4.4
Total $ 14.8 $ 15.3 $ 31.9