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COMMITMENTS AND CONTINGENCIES - Environmental Matters Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Site Contingency [Line Items] |  |
Reserve balance | $ 121.2 | $ 122.6
MGP Sites |  |
Site Contingency [Line Items] |  |
Reserve balance | $ 111.7 | $ 112.6

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