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Commitments and Contingencies - Additional Information (Details)
$ in Millions
3 Months Ended 12 Months Ended
Oct. 31, 2023
USD ($)
MW
Oct. 31, 2024
USD ($)
MW
Oct. 31, 2023
USD ($)
Commitments And Contingencies [Line Items]      
Derivative net gain (loss)   $ (6.9) $ 4.1
Derivative liabilities $ 0.0 $ 4.0 $ 0.0
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other Liabilities, Noncurrent Other Liabilities, Noncurrent Other Liabilities, Noncurrent
Recorded unconditional purchase obligation   $ 90.8  
Derivative asset $ 4.1 $ 1.2 $ 4.1
CT-RFP 2 Derby 14.9 Mega Watt Project      
Commitments And Contingencies [Line Items]      
Capacity of plant | MW   14.9  
Tulare Biomat Project      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   20 years  
LIPA project      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   7 years  
LIPA project | Maximum      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   20 years  
Derby Project      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   6 years  
Derby Project | Maximum      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   20 years  
Derby Project 14.0 Mega Watt      
Commitments And Contingencies [Line Items]      
Capacity of plant | MW 14 14  
Derby Project 2.8 Mega Watt      
Commitments And Contingencies [Line Items]      
Capacity of plant | MW 2.8 2.8  
Toyota Project      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   2 years  
Toyota Project | Maximum      
Commitments And Contingencies [Line Items]      
Term for procuring fuel   20 years