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Summary of Significant Accounting Policies - Narrative (Details)
3 Months Ended 12 Months Ended
Aug. 26, 2017
USD ($)
Aug. 25, 2018
USD ($)
segment
shares
Aug. 26, 2017
USD ($)
shares
Aug. 27, 2016
USD ($)
shares
Aug. 29, 2009
Aug. 26, 2018
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of reporting segments | segment   5        
Certificates of deposit   $ 67,600,000        
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   14 years 1 month        
Discount rate, lower range   2.80%        
Discount range, upper range   3.00%        
Discount period, lower range   10 years        
Discount period, upper range   30 years        
Inflation rate   3.00%        
Undistributed earnings from foreign subsidiaries   $ 129,700,000        
Advertising costs   $ 2,800,000 $ 3,700,000 $ 1,500,000    
Shares excluded from calculation of diluted earnings per share because they were anti-dilutive (in shares) | shares   4,972 16 9,883    
Increase in retained earnings $ 1,386,438,000 $ 1,405,239,000 $ 1,386,438,000      
Future minimum payments due under operating lease   47,118,000        
Decrease in provision from income taxes   3,100,000        
Tax cuts and jobs act, reclassification from AOCI to retained earnings, tax effect   1,200,000        
Accounting Standards Update 2016-09            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation   500,000        
Retained Earnings | Accounting Standards Update 2016-09            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Cumulative-effect adjustment   (700,000)        
Capital Surplus | Accounting Standards Update 2016-09            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Cumulative-effect adjustment   $ 700,000        
Conversion of Class B Common Stock in to Common Stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Conversion ratio   1        
Non-Employee Directors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expiration period   8 years        
Stock Appreciation Rights (SARs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expiration period   10 years        
Stock Appreciation Rights (SARs) | Non-Employee Directors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expiration period   8 years     10 years  
Stock Appreciation Rights (SARs) | Certain Share-based Awards Granted During Fiscal 2016, 2015 and 2014 to Non-employee Directors | Non-Employee Directors            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expiration period   8 years        
Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Remaining lives   2 years        
Credit adjusted risk-free rate   7.00%        
Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Remaining lives   26 years        
Credit adjusted risk-free rate   7.50%        
Customer contracts            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average useful life   14 years 7 months        
Other intangible assets            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average useful life   5 years 2 months        
Machinery and Equipment            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Impairment charge of capitalized costs as part of ongoing CRM systems project $ 55,800,000          
Pro Forma | Minimum | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in retained earnings           $ 35,000,000
Pro Forma | Maximum | Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Increase in retained earnings           $ 42,000,000