Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Aug. 26, 2023 USD ($) Segment shares	Aug. 27, 2022 USD ($) shares	Aug. 28, 2021 USD ($) shares
Summary of Significant Accounting Policies [Line Items]
Number of reporting segments | Segment	5
Short-term investments	$ 10,157,000	$ 0
Percentage of revenues derived from route servicing fees	88.50%
Current assets related to deferred commissions	$ 16,500,000	15,200,000
Noncurrent assets related to deferred commissions	70,400,000	65,100,000
Amortization expense related to deferred commissions	$ 16,500,000	15,400,000
Estimated service lives of rental merchandise, minimum	6 months
Estimated service lives of rental merchandise, maximum	36 months
Impairment of goodwill and definite-lived intangible assets	$ 0	0	$ 0
Weighted average useful life	12 years 10 months 24 days
Discount rate, lower range	4.30%
Discount range, upper range	4.70%
Inflation rate	3.00%
Advertising costs	$ 9,900,000	$ 14,700,000	$ 3,500,000
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares) | shares	51,708	34,416	6,005
Conversion of Class B Common Stock in to Common Stock
Summary of Significant Accounting Policies [Line Items]
Conversion ratio	1
Stock Appreciation Rights (SARs)
Summary of Significant Accounting Policies [Line Items]
Expiration period	10 years
Stock Appreciation Rights (SARs) | Certain Share-based Awards Granted During Fiscal 2020, 2019 and 2018 to Non-employee Directors | Non-Employee Directors
Summary of Significant Accounting Policies [Line Items]
Expiration period	8 years
Minimum
Summary of Significant Accounting Policies [Line Items]
Discount period, lower range	10 years
Remaining lives	1 year
Credit adjusted risk-free rate	7.00%
Maximum
Summary of Significant Accounting Policies [Line Items]
Discount period, upper range	30 years
Remaining lives	21 years
Credit adjusted risk-free rate	7.50%
Customer Contracts
Summary of Significant Accounting Policies [Line Items]
Weighted average useful life	14 years 6 months
Other Intangible Assets
Summary of Significant Accounting Policies [Line Items]
Weighted average useful life	8 years 2 months 12 days
Core Laundry Operations
Summary of Significant Accounting Policies [Line Items]
Percentage of revenues recognized over time	88.40%	88.40%	95.80%
Percentage of revenues recognized at a point in time	11.60%	11.60%	4.20%
Specialty Garments
Summary of Significant Accounting Policies [Line Items]
Percentage of revenues recognized over time	83.90%	83.80%	81.80%
Percentage of revenues recognized at a point in time	16.10%	16.20%	18.20%
First Aid
Summary of Significant Accounting Policies [Line Items]
Percentage of revenues recognized at a point in time	100.00%