v3.25.2
Fair Value Measurements - Schedule of Carrying Value and Estimated Fair Value of Financial Instruments (Details) - Fair Value Measured on Recurring Basis - USD ($)
$ in Millions
May 31, 2025
Aug. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets at fair value $ 376.9 $ 852.5
Total    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 371.8 845.8
Assets in fair value hierarchy 371.8 845.8
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents 371.8 845.8
Assets in fair value hierarchy 371.8 845.8
Total assets at fair value 371.8 845.8
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 $ 5.1 $ 6.7