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Acquisitions - Narrative (Details) - Aggregate Information Relating to Acquisition of Businesses
$ in Millions
1 Months Ended 12 Months Ended
Sep. 30, 2019
USD ($)
Aug. 28, 2021
USD ($)
Business
Aug. 29, 2020
Business
Aug. 31, 2019
Business
Business Acquisition [Line Items]        
Number of business acquired | Business   8 8 6
Business acquisitions, aggregate purchase price | $ $ 38.8 $ 8.7