Summary of Significant Accounting Policies - Schedule of Total Revenue Disaggregated by Service Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 28, 2021	Aug. 29, 2020	Aug. 31, 2019
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,826,216	$ 1,804,159	$ 1,809,376
Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	100.00%	100.00%	100.00%
Core Laundry Operations
Disaggregation of Revenue [Line Items]
Total revenues	$ 1,615,560	$ 1,601,485	$ 1,616,205
Core Laundry Operations | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	88.50%	88.80%	89.30%
Specialty Garments
Disaggregation of Revenue [Line Items]
Total revenues	$ 145,454	$ 133,185	$ 132,767
Specialty Garments | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	8.00%	7.40%	7.30%
First Aid
Disaggregation of Revenue [Line Items]
Total revenues	$ 65,202	$ 69,489	$ 60,404
First Aid | Revenue | Revenues
Disaggregation of Revenue [Line Items]
Percentage of revenues	3.50%	3.80%	3.40%