PENSION AND OTHER POSTRETIREMENT BENEFITS (Estimated Future Benefit Payments) (Details) $ in Millions |
Dec. 31, 2019
USD ($)
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|---|---|
| Pension Plan [Member] | Ìý |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | Ìý |
| 2020 | $ 73.6 |
| 2021 | 71.1 |
| 2022 | 70.4 |
| 2023 | 71.2 |
| 2024 | 66.9 |
| 2025 | 318.2 |
| Other Postretirement Benefits Plan [Member] | Ìý |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | Ìý |
| 2020 | 16.5 |
| Medicare Subsidy - 2020 | (0.7) |
| 2021 | 15.8 |
| Medicare Subsidy - 2021 | (0.8) |
| 2022 | 15.5 |
| Medicare Subsidy - 2022 | (0.8) |
| 2023 | 15.5 |
| Medicare Subsidy - 2023 | (0.8) |
| 2024 | 15.2 |
| Medicare Subsidy - 2024 | (0.9) |
| 2025 | 72.7 |
| Medicare Subsidy - 2025 | (4.6) |
| Gross Company Benefits [Member] | Other Postretirement Benefits Plan [Member] | Ìý |
| Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] | Ìý |
| 2020 | 17.2 |
| 2021 | 16.6 |
| 2022 | 16.3 |
| 2023 | 16.3 |
| 2024 | 16.1 |
| 2025 | $ 77.3 |
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- Definition Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in fourth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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- Definition Amount of prescription drug subsidy receipts expected after fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of prescription drug subsidy receipts expected in next fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of prescription drug subsidy receipts expected in fifth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of prescription drug subsidy receipts expected in fourth fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of prescription drug subsidy receipts expected in third fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of prescription drug subsidy receipts expected in second fiscal year following latest fiscal year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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