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PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2016
Pension Plans, Defined Benefit [Member] |  |  |  |  |
Definted Benefit Plan Disclosure [Line Items] |  |  |  |  |
Reduction in other postretirement benefit expense | $ (1.9) |  | $ (6.1) |  |
Total service and interest costs for other post retirement benefit plans | 12.0 |  | 35.9 |  |
Pension Contributions | 0.5 | $ 23.9 | 0.7 | $ 34.1 |
Other Postretirement Benefit Plans, Defined Benefit [Member] |  |  |  |  |
Definted Benefit Plan Disclosure [Line Items] |  |  |  |  |
Reduction in other postretirement benefit expense | (0.2) |  | (1.4) |  |
Total service and interest costs for other post retirement benefit plans | 2.7 |  | 8.1 |  |
Other Postretirement Benefit Expense | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |
Scenario, Forecast [Member] | Pension Plans, Defined Benefit [Member] |  |  |  |  |
Definted Benefit Plan Disclosure [Line Items] |  |  |  |  |
Reduction in net periodic benefit expense |  |  |  |  | $ 8.2
Reduction in other postretirement benefit expense |  |  |  |  | $ 1.8

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- Definition The amount of costs recognized during the period for non-pension postretirement benefits, such as medical, dental and life insurance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (q) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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