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Fair Value Measurements - Recurring Basis - Investment in ECOTEC - Unobservable inputs (Details) - ECOTEC
$ in Millions
Mar. 31, 2025
USD ($)
Mar. 31, 2024
USD ($)
Fair value measurement of assets and liabilities    
Ownership interest (as a percent) 25.00%  
Investment $ 14.7 $ 14.9
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 7.3 3.8