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Segment Information (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 31, 2025
USD ($)
segment
Jan. 31, 2024
USD ($)
Jan. 31, 2025
USD ($)
Jan. 31, 2024
USD ($)
Segment Reporting [Abstract]        
Number of reportable segments | segment 3      
Segment Reporting Information [Line Items]        
Revenue: $ 404,626 $ 460,705 $ 1,235,030 $ 1,404,526
Adjusted Operating Income (Loss): 103,433 98,729 292,969 280,834
Depreciation and Amortization: 36,474 45,474 110,445 129,376
Pretax noncash impairment charge 6,400   6,400  
Operating Segments        
Segment Reporting Information [Line Items]        
Adjusted Operating Income (Loss): 103,433 98,729 292,969 280,834
Depreciation and Amortization: 32,679 35,841 99,951 112,684
Operating Segments | Research        
Segment Reporting Information [Line Items]        
Revenue: 267,544 256,199 794,738 771,673
Adjusted Operating Income (Loss): 65,669 57,098 180,412 169,481
Depreciation and Amortization: 21,918 22,029 66,999 67,909
Operating Segments | Learning        
Segment Reporting Information [Line Items]        
Revenue: 137,082 146,334 422,910 404,594
Adjusted Operating Income (Loss): 37,764 37,513 116,135 85,051
Depreciation and Amortization: 10,761 13,812 32,952 41,338
Operating Segments | Held for Sale or Sold        
Segment Reporting Information [Line Items]        
Revenue: 0 58,172 17,382 228,259
Adjusted Operating Income (Loss): 0 4,118 (3,578) 26,302
Depreciation and Amortization: 0 0 0 3,437
Corporate Expenses        
Segment Reporting Information [Line Items]        
Depreciation and Amortization: $ 3,795 $ 9,633 $ 10,494 $ 16,692