PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Pension Plans, Defined Benefit [Member] | Ìý | Ìý | Ìý | Ìý |
| Definted Benefit Plan Disclosure [Line Items] | Ìý | Ìý | Ìý | Ìý |
| Payment for Pension Benefits | $ 3.3 | $ 2.3 | $ 5.6 | $ 2.3 |
| Other Postretirement Benefit Plans, Defined Benefit [Member] | Ìý | Ìý | Ìý | Ìý |
| Definted Benefit Plan Disclosure [Line Items] | Ìý | Ìý | Ìý | Ìý |
| OPEB Contributions | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount of cost (reversal of cost) for other postretirement benefits. Excludes pension benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of payment for pension benefits. Excludes other postretirement benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|