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SIGNIFICANT ACCOUNTING POLICIES - CASH AND ACCOUNTS RECEIVABLE (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
CAPITAL CONSTRUCTION FUND |  |  |
Restricted Cash |  | $ 2.3 |
Allowance for doubtful accounts |  |  |
Balance at Beginning of year | $ 9.9 | 13.0 | $ 10.1
Expense | 0.8 | (2.1) | 3.2
Write-offs and Other | (0.9) | (1.0) | (0.3)
Balance at End of Year | $ 9.8 | $ 9.9 | $ 13.0

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