Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Aug. 28, 2021 USD ($) segment shares	Aug. 29, 2020 USD ($) shares	Aug. 31, 2019 USD ($) shares	Aug. 31, 2019
Summary of Significant Accounting Policies [Line Items]
Number of reporting segments | segment	5
Short-term investments	$ 0	$ 0
Percentage of revenues derived from route servicing fees	91.30%
Current assets related to deferred commissions	$ 14,200,000	13,300,000
Noncurrent assets related to deferred commissions	60,600,000	55,600,000
Amortization expense related to deferred commissions	$ 14,400,000	13,700,000
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	11 years 10 months 24 days
Discount rate, lower range	1.31%
Discount range, upper range	1.91%
Inflation rate	3.00%
Advertising costs	$ 3,500,000	$ 3,800,000	$ 3,600,000
Anti-dilutive securities excluded from calculation of diluted earnings per share (in shares) | shares	6,005	8,094	8,325
Accounting Standards Update 2016-13
Summary of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adoption date	Aug. 30, 2020
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, immaterial effect	true
Accounting Standards Update 2017-07
Summary of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adoption date	Aug. 29, 2021
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, immaterial effect	true
Accounting Standards Update 2018-15
Summary of Significant Accounting Policies [Line Items]
Change in accounting principle, accounting standards update, adoption date	Aug. 30, 2020
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, immaterial effect	true
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, lower range	30 years
Remaining lives	25 years
Credit adjusted risk-free rate	7.50%
Customer contracts
Summary of Significant Accounting Policies [Line Items]
Weighted average useful life	13 years 6 months
Other intangible assets
Summary of Significant Accounting Policies [Line Items]
Weighted average useful life	9 years 7 months 6 days
Core Laundry Operations
Summary of Significant Accounting Policies [Line Items]
Percentage of revenues recognized over time	95.80%	94.70%		95.80%
Percentage of revenues recognized at a point in time	4.20%	5.30%		4.20%
Specialty Garments
Summary of Significant Accounting Policies [Line Items]
Percentage of revenues recognized over time	81.80%	79.20%		82.70%
Percentage of revenues recognized at a point in time	18.20%	20.80%		17.30%
First Aid
Summary of Significant Accounting Policies [Line Items]
Percentage of revenues recognized at a point in time	100.00%