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Restructuring and Related Charges (Credits) - Pretax Restructuring Charges (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Jan. 31, 2021
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   $ 49,389 $ (1,427) $ 33,310
Business Optimization Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   507 (1,427) 33,449
Restructuring and related charges incurred to date   65,342    
Business Optimization Program | Severance and termination benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   (1,012) (3,276) 11,531
Restructuring and related charges incurred to date   34,107    
Business Optimization Program | Impairment of operating lease ROU assets and property and equipment        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits) $ 14,900 0 0 14,918
Restructuring and related charges incurred to date   15,079    
Business Optimization Program | Acceleration of expense related to operating lease ROU assets and property and equipment        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits) $ 3,400 0 0 3,378
Restructuring and related charges incurred to date   3,378    
Business Optimization Program | Facility related charges, net        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   1,519 1,849 3,684
Restructuring and related charges incurred to date   11,038    
Business Optimization Program | Other activities        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   0 0 (62)
Restructuring and related charges incurred to date   1,740    
Fiscal Year 2023 Restructuring Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   48,882    
Fiscal Year 2023 Restructuring Program | Severance and termination benefits        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   25,827    
Fiscal Year 2023 Restructuring Program | Impairment of operating lease ROU assets and property and equipment        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   12,696    
Fiscal Year 2023 Restructuring Program | Acceleration of expense related to operating lease ROU assets and property and equipment        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   2,140    
Fiscal Year 2023 Restructuring Program | Facility related charges, net        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   4,150    
Fiscal Year 2023 Restructuring Program | Other activities        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   1,784    
Fiscal Year 2023 Restructuring Program | Consulting costs        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   2,285    
Research | Business Optimization Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   (231) 238 99
Restructuring and related charges incurred to date   3,652    
Research | Fiscal Year 2023 Restructuring Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   2,413    
Academic | Business Optimization Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   31 (470) 3,457
Restructuring and related charges incurred to date   12,447    
Academic | Fiscal Year 2023 Restructuring Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   10,335    
Talent | Business Optimization Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   (246) 23 303
Restructuring and related charges incurred to date   4,900    
Talent | Fiscal Year 2023 Restructuring Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   3,255    
Corporate Expenses | Business Optimization Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   953 $ (1,218) $ 29,590
Restructuring and related charges incurred to date   44,343    
Corporate Expenses | Fiscal Year 2023 Restructuring Program        
Restructuring Cost and Reserve [Line Items]        
Restructuring and related charges (credits)   $ 32,879