Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 28, 2021	Aug. 29, 2020	Aug. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 1,826,216	$ 1,804,159	$ 1,809,376
Income (loss) from operations	195,825	172,729	232,008
Interest (income) expense, net	(2,568)	(6,382)	(9,082)
Income (loss) before taxes	196,871	177,888	237,924
Depreciation and amortization	105,955	104,697	103,333
Capital expenditures	133,639	116,717	119,815
Total assets	2,381,065	2,199,027	2,047,320
US and Canadian Rental and Cleaning | Operating Segments
Segment Reporting Information [Line Items]
Revenues	1,580,850	1,552,179	1,582,416
Income (loss) from operations	290,774	247,392	235,046
Interest (income) expense, net	(2,760)	(3,741)	(4,105)
Income (loss) before taxes	293,357	251,088	239,122
Depreciation and amortization	73,611	71,020	69,376
Capital expenditures	129,327	110,024	115,071
Total assets	2,179,243	1,992,546	1,865,713
MFG | Operating Segments
Segment Reporting Information [Line Items]
Revenues	264,021	214,683	254,218
Income (loss) from operations	73,579	64,097	84,248
Income (loss) before taxes	73,260	63,912	84,008
Depreciation and amortization	2,530	2,404	2,384
Capital expenditures	456	397	401
Total assets	37,605	33,233	36,376
MFG | Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues	(264,021)	(214,683)	(254,111)
Income (loss) from operations	(283)	10,012	1,128
Income (loss) before taxes	(283)	10,012	1,128
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenues	34,710	49,306	33,682
Income (loss) from operations	(192,353)	(171,514)	(107,468)
Interest (income) expense, net	192	(2,641)	(4,977)
Income (loss) before taxes	(194,970)	(170,629)	(104,742)
Depreciation and amortization	23,190	24,983	25,098
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues	1,615,560	1,601,485	1,616,205
Income (loss) from operations	171,717	149,987	212,954
Interest (income) expense, net	(2,568)	(6,382)	(9,082)
Income (loss) before taxes	171,364	154,383	219,516
Depreciation and amortization	99,331	98,407	96,858
Capital expenditures	129,783	110,421	115,472
Total assets	2,216,848	2,025,779	1,902,089
Specialty Garments
Segment Reporting Information [Line Items]
Revenues	145,454	133,185	132,767
Specialty Garments | Operating Segments
Segment Reporting Information [Line Items]
Revenues	145,454	133,185	132,767
Income (loss) from operations	24,801	17,845	14,145
Income (loss) before taxes	26,198	18,604	13,499
Depreciation and amortization	4,510	4,335	4,759
Capital expenditures	3,407	4,864	3,423
Total assets	119,305	131,328	110,335
First Aid
Segment Reporting Information [Line Items]
Revenues	65,202	69,489	60,404
First Aid | Operating Segments
Segment Reporting Information [Line Items]
Revenues	65,202	69,489	60,404
Income (loss) from operations	(693)	4,897	4,909
Income (loss) before taxes	(691)	4,901	4,909
Depreciation and amortization	2,114	1,955	1,716
Capital expenditures	449	1,432	920
Total assets	$ 44,912	$ 41,920	$ 34,896