Segment Reporting - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Aug. 29, 2020	May 30, 2020	Feb. 29, 2020	Nov. 30, 2019	Aug. 31, 2019	May 25, 2019	Feb. 23, 2019	Nov. 24, 2018	Aug. 29, 2020	Aug. 31, 2019	Aug. 25, 2018
Segment Reporting Information [Line Items]
Revenues	$ 428,643	$ 445,518	$ 464,600	$ 465,398	$ 479,621	$ 453,720	$ 437,485	$ 438,550	$ 1,804,159	$ 1,809,376	$ 1,696,489
Income (loss) from operations									172,729	232,008	182,376
Interest (income) expense, net									(6,382)	(9,082)	(5,543)
Income (loss) before taxes									177,888	237,924	187,246
Depreciation and amortization									104,697	103,333	96,662
Capital expenditures									116,717	119,815	112,747
Total assets	2,199,027				2,047,320				2,199,027	2,047,320	1,843,386
US and Canadian Rental and Cleaning | Operating Segments
Segment Reporting Information [Line Items]
Revenues									1,552,179	1,582,416	1,485,548
Income (loss) from operations									247,392	235,046	213,322
Interest (income) expense, net									(3,741)	(4,105)	(3,927)
Income (loss) before taxes									251,088	239,122	217,252
Depreciation and amortization									71,020	69,376	64,481
Capital expenditures									110,024	115,071	105,481
Total assets	1,992,546				1,865,713				1,992,546	1,865,713	1,670,713
MFG | Operating Segments
Segment Reporting Information [Line Items]
Revenues									214,683	254,218	247,530
Income (loss) from operations									64,097	84,248	89,035
Income (loss) before taxes									63,912	84,008	88,856
Depreciation and amortization									2,404	2,384	2,238
Capital expenditures									397	401	2,882
Total assets	33,233				36,376				33,233	36,376	33,622
MFG | Net Interco MFG Elim
Segment Reporting Information [Line Items]
Revenues									(214,683)	(254,111)	(247,424)
Income (loss) from operations									10,012	1,128	(9,658)
Income (loss) before taxes									10,012	1,128	(9,658)
Corporate | Operating Segments
Segment Reporting Information [Line Items]
Revenues									49,306	33,682	37,994
Income (loss) from operations									(171,514)	(107,468)	(129,111)
Interest (income) expense, net									(2,641)	(4,977)	(1,616)
Income (loss) before taxes									(170,629)	(104,742)	(127,510)
Depreciation and amortization									24,983	25,098	24,108
Subtotal Core Laundry Operations
Segment Reporting Information [Line Items]
Revenues									1,601,485	1,616,205	1,523,648
Income (loss) from operations									149,987	212,954	163,588
Interest (income) expense, net									(6,382)	(9,082)	(5,543)
Income (loss) before taxes									154,383	219,516	168,940
Depreciation and amortization									98,407	96,858	90,827
Capital expenditures									110,421	115,472	108,363
Total assets	2,025,779				1,902,089				2,025,779	1,902,089	1,704,335
Specialty Garments
Segment Reporting Information [Line Items]
Revenues									133,185	132,767	118,477
Specialty Garments | Operating Segments
Segment Reporting Information [Line Items]
Revenues									133,185	132,767	118,477
Income (loss) from operations									17,845	14,145	14,070
Income (loss) before taxes									18,604	13,499	13,589
Depreciation and amortization									4,335	4,759	4,244
Capital expenditures									4,864	3,423	3,781
Total assets	131,328				110,335				131,328	110,335	110,811
First Aid
Segment Reporting Information [Line Items]
Revenues									69,489	60,404	54,364
First Aid | Operating Segments
Segment Reporting Information [Line Items]
Revenues									69,489	60,404	54,364
Income (loss) from operations									4,897	4,909	4,718
Income (loss) before taxes									4,901	4,909	4,717
Depreciation and amortization									1,955	1,716	1,591
Capital expenditures									1,432	920	603
Total assets	$ 41,920				$ 34,896				$ 41,920	$ 34,896	$ 28,240