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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS - Net Amounts Recognized (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Net amounts recognized in the balance sheets at December 31 |  |  |
Benefit obligations | $ 193.0 | $ 193.0 | $ 197.0
Cash contributions and benefit payments to unfunded plans | 1.2 | 3.7 |
Additional cash contributions, including benefit payments to unfunded plans | $ 5.5 | $ 5.5 |

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