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Fair Value Measurements - Recurring Basis - Investment in ECOTEC - Unobservable inputs (Details) - ECOTEC $ in Millions | Dec. 31, 2024 USD ($) | Dec. 31, 2023
--- | --- | ---
Fair value measurement of assets and liabilities |  |
Ownership interest (as a percent) | 25.00% |
Investment | $ 14.7 |
Equity Securities, FV-NI, Fair Value by Fair Value Hierarchy Level | Level 3 |
Equity investment | Level 3 | Discounted cash flow | WACC | Minimum |  |
Significant unobservable inputs |  |
Equity Securities, FV-NI, Measurement Input | 0 | 0.004
Equity investment | Level 3 | Discounted cash flow | WACC | Maximum |  |
Significant unobservable inputs |  |
Equity Securities, FV-NI, Measurement Input | 0.17 | 0.20
Equity investment | Level 3 | Discounted cash flow | WACC | Median |  |
Significant unobservable inputs |  |
Equity Securities, FV-NI, Measurement Input | 0.129 | 0.135
Equity investment | Level 3 | Guideline public company | Revenue multiple | Minimum |  |
Significant unobservable inputs |  |
Equity Securities, FV-NI, Measurement Input | 1.6 | 1.5
Equity investment | Level 3 | Guideline public company | Revenue multiple | Maximum |  |
Significant unobservable inputs |  |
Equity Securities, FV-NI, Measurement Input | 7.3 | 7.2
Equity investment | Level 3 | Guideline public company | Revenue multiple | Median |  |
Significant unobservable inputs |  |
Equity Securities, FV-NI, Measurement Input | 4.3 | 3.8

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