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Revenue Recognition (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2022
Aug. 31, 2021
Deferred revenue $ 102.4 $ 88.6
Remaining performance obligations $ 153.4  
Other Long-Term Liabilities [Member]    
Deferred revenue   2.7
Minimum [Member]    
Receivables collection period 30 days  
Maximum [Member]    
Receivables collection period 150 days  
Direct Sales Commissions [Member]    
Capitalized contract cost $ 13.8 12.1
Direct Sales Commissions [Member] | Other Current Assets [Member]    
Capitalized contract cost 12.6 11.0
Direct Sales Commissions [Member] | Other Long-Term Liabilities [Member]    
Capitalized contract cost 1.2 1.1
Obtain Revenue Contracts [Member]    
Capitalized contract cost 18.1  
Selling, General, And Administrative Expense [Member]    
Capitalized contract cost, amortized 16.4  
Subscription Offerings [Member]    
Deferred revenue 88.1 77.0
Subscription [Member]    
Deferred revenue recognized $ 123.1 $ 99.5