Quarterly report pursuant to Section 13 or 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.21.2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
 3 Months Ended 12 Months Ended
Jul. 31, 2021
USD ($)
Segment
Jul. 31, 2020
USD ($)
Apr. 30, 2021
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]      
Number of business segments | Segment 7    
Number of line of business | Segment 4    
Credit loss for available for sales debt securities $ 0 $ 0  
Impairment of long-lived assets 0 0  
Impairment of goodwill 0   $ 0
Impairment of intangible assets 0   $ 0
Performance-related bonus expenses $ 96,000,000.0 59,900,000  
ASU 2021-01      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Change in accounting principle, accounting standards update, adopted true    
Change in accounting principle, accounting standards update, adoption date May 01, 2021    
Change in accounting principle, accounting standards update, immaterial effect true    
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    
Acquired Companies      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Business acquisitions adjustment, reduce in goodwill   (400,000)  
Business acquisitions adjustment, increase in deferred tax asset   $ 400,000  
Mexican Subsidiary      
Organization And Summary Of Significant Accounting Policies [Line Items]      
Percentage of Noncontrolling interest in subsidiary 51.00%