PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Other Potential Benefit Obligations) (Details) - USD ($) $ in Millions |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|---|
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined Benefit Plan, Fair Value of Plan Assets | $ 215.6 | $ 202.4 | $ 193.4 |
| Pension Benefits [Member] | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined Benefit Plan, Fair Value of Plan Assets | 749.8 | 685.8 | 700.6 |
| Defined Benefit Plan, Benefit Obligation | (973.1) | (931.6) | (910.8) |
| Defined Benefit Plan, Funded (Unfunded) Status of Plan | (223.3) | (245.8) | |
| Other Benefits [Member] | |||
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | |||
| Defined Benefit Plan, Fair Value of Plan Assets | 262.5 | 253.0 | 250.6 |
| Defined Benefit Plan, Benefit Obligation | (265.9) | (264.6) | $ (266.0) |
| Defined Benefit Plan, Funded (Unfunded) Status of Plan | $ (3.4) | $ (11.6) |
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- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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.
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