v3.26.1
Fair Value Measurements - Schedule of Carrying Value and Estimated Fair Value of Financial Instruments (Details) - USD ($)
$ in Millions
May 31, 2026
Aug. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value $ 418.0 $ 427.6
Total    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 411.9 422.5
Assets in fair value hierarchy 411.9 422.5
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 411.9 422.5
Assets in fair value hierarchy 411.9 422.5
Total assets at fair value 411.9 422.5
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 0.0 0.0
Assets in fair value hierarchy 0.0 0.0
Total assets at fair value 0.0 0.0
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 0.0 0.0
Assets in fair value hierarchy 0.0 0.0
Total assets at fair value 0.0 0.0
Other investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other investments $ 6.1 $ 5.1