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Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2022
USD ($)
Oct. 31, 2022
USD ($)
Oct. 31, 2021
USD ($)
Oct. 31, 2022
USD ($)
business
segment
Oct. 31, 2021
USD ($)
Apr. 30, 2022
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]            
Number of business segments | segment       8    
Number of line of business | business       5    
Credit loss for available for sales debt securities   $ 0 $ 0 $ 0 $ 0  
Impairment of right of use assets   0 7,392,000 0 7,392,000  
Impairment of fixed assets   0 1,915,000 0 1,915,000  
Impairment of intangible assets       0   $ 0
Impairment of goodwill $ 0     0   $ 0
Performance-related bonus expenses   $ 99,800,000 119,200,000 $ 201,600,000 215,200,000  
Right-Of-Use Assets            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Impairment of right of use assets     7,400,000   7,400,000  
Leasehold Improvements And Furniture And Fixtures            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Impairment of fixed assets     $ 1,900,000   $ 1,900,000  
Minimum            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Intangible assets estimated useful lives       1 year    
Amortization of long-term retention awards       4 years    
Maximum            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Intangible assets estimated useful lives       24 years    
Amortization of long-term retention awards       5 years    
Mexican Subsidiary            
Organization And Summary Of Significant Accounting Policies [Line Items]            
Percentage of noncontrolling interest in subsidiary   51.00%   51.00%