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Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Estimated Net Periodic Benefit Cost) (Details)

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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Estimated Net Periodic Benefit Cost) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý
Estimated net periodic benefit cost $ 6.1
Pension Benefits [Member] Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý
Estimated net periodic benefit cost 12.3
Other Benefits [Member] Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý
Estimated net periodic benefit cost $ (6.2)