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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization of intangible assets $ 10.3 $ 10.1
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
Amortization expense in fiscal 2022 41.2  
Amortization expense in fiscal 2023 40.5  
Amortization expense in fiscal 2024 40.0  
Amortization expense in fiscal 2025 31.9  
Amortization expense in fiscal 2026 $ 29.1