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Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Annual Contributions To The Pension Plans) (Details)

v3.8.0.1
PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Annual Contributions To The Pension Plans) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý Ìý
Defined Benefit Plan, Funded Percentage 70.00% Ìý
Company contributions $ 2.1 $ 1.1
Expected company contributions, next fiscal year $ 4.0 Ìý
Value of VEBA Trust Assets as a Percentage of the Funding Obligation 0.9 Ìý
Pension Benefits [Member] Ìý Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý Ìý
Company contributions $ 24.4 1.2
Expected company contributions, next fiscal year 27.8 Ìý
Direct Payments [Member] Ìý Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý Ìý
Company contributions 2.1 1.1
Expected company contributions, next fiscal year 4.0 Ìý
Veba Trust [Member] Ìý Ìý
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Ìý Ìý
Company contributions 0.0 $ 0.0
Expected company contributions, next fiscal year $ 0.0 Ìý