v3.26.3
Income Taxes - Schedule of Statutory Rate to Effective Income Tax Rate Continuing Basis (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
Tax Effect      
U.S. federal statutory rate provision $ 142.9 $ 105.0 $ 115.2
State and local income taxes, net of federal income tax effects 20.7 14.8 19.7
Foreign tax effects:   4.2 2.3
Research and development tax credits   (13.7) (10.1)
Changes in unrecognized tax benefits 0.2 (4.8) 2.0
Tax gain of sale of assets 10.4    
Effective income tax rate $ 149.4 $ 103.6 $ 126.0
Rate Impact      
U.S. federal statutory rate provision 21.00%    
State and local income taxes, net of federal income tax effects 3.00%    
Changes in unrecognized tax benefits 0.00%    
Tax gain of sale of assets 1.50%    
Effective income tax rate 21.90%    
UNITED STATES      
Tax Effect      
Research and development tax credits $ (11.1)    
Other $ (4.5)    
Rate Impact      
Research and development tax credits (1.60%)    
Other (0.70%)    
IRELAND      
Tax Effect      
Foreign tax effects: $ (9.3)    
Rate Impact      
Foreign tax effects: (1.30%)    
Other      
Tax Effect      
Foreign tax effects: $ 0.1