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ACCOUNTING POLICIES (Details 1) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounting Policies [Abstract] |  |  |
Revenue Recognition, Cost-to-Cost Method | $ 104.8 | $ 57.8 | $ 22.8
Contract with Customer, Liability | 34.8 | 43.4 |
Contract with Customer, Asset, after Allowance for Credit Loss | 20.1 | 16.2 |
Property, Plant and Equipment [Line Items] |  |  |
Gain on disposition of property, plant and equipment |  | (13.0) | (1.4)
Gain on disposition of property, plant and equipment |  | (13.0) | $ (1.4)
Asset retirement obligation non-current portion | 63.3 | 52.6 |
Asset retirement obligation revision of estimate | 8.2 | 1.0 |
Long-term Debt, Fair Value | 2,626.2 | $ 2,517.7 |
Non-recurring Fair Value, Assets | $ 0.0 |  |
Average remaining life expectancy of the inactive participants in the defined benefit pension plan (in years) | 17 years | 17 years | 17 years
Short-term investments | $ 0.0 | $ 0.0 |
Sale of domestic private trucking fleet and operations [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Gain on disposition of property, plant and equipment | (27.0) |  |
Gain on disposition of property, plant and equipment | (27.0) |  |
Insurance recoveries associated with business interruption [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Gain on disposition of property, plant and equipment | (15.6) |  |
Gain on disposition of property, plant and equipment | $ (15.6) |  |

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