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COMMITMENTS AND CONTINGENCIES - Environmental Matters Narrative (Details) $ in Millions | Sep. 30, 2023 USD ($) site | Dec. 31, 2022 USD ($)
--- | --- | ---
Site Contingency [Line Items] |  |
Number of environmental sites | site | 2 |
Reserve balance | $ 130.5 | $ 122.6
MGP Sites |  |
Site Contingency [Line Items] |  |
Reserve balance | $ 120.5 | $ 112.6

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