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Fair Value Measurements - Recurring Basis - Investment in ECOTEC - Unobservable inputs (Details) - ECOTEC
Dec. 31, 2025
Dec. 31, 2024
Fair value measurement of assets and liabilities    
Ownership interest (as a percent) 25.00%  
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
Equity investment | Level 3 | Discounted cash flow | WACC | Maximum    
Significant unobservable inputs    
Equity Securities, FV-NI, Measurement Input 17.8 0.17
Equity investment | Level 3 | Discounted cash flow | WACC | Median    
Significant unobservable inputs    
Equity Securities, FV-NI, Measurement Input 0.111 0.129
Equity investment | Level 3 | Guideline public company | Revenue multiple | Minimum    
Significant unobservable inputs    
Equity Securities, FV-NI, Measurement Input 1.6 1.6
Equity investment | Level 3 | Guideline public company | Revenue multiple | Maximum    
Significant unobservable inputs    
Equity Securities, FV-NI, Measurement Input 7.6 7.3
Equity investment | Level 3 | Guideline public company | Revenue multiple | Median    
Significant unobservable inputs    
Equity Securities, FV-NI, Measurement Input 5.3 4.3