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Fair Value Measurements - Recurring Basis - Investment in ECOTEC - Unobservable inputs (Details) - ECOTEC - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Fair value measurement of assets and liabilities |  |
Ownership interest (as a percent) | 25.00% | 25.00%
Investment | $ 14.7 | $ 14.7

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