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Associate Benefit Plans (Summary Of Stock Option Activity) (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Sep. 01, 2018
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Ending Balance, Aggregate Intrinsic Value | $ $ 22,037
Exercisable, Ending Balance, Aggregate Intrinsic Value | $ $ 7,673
Stock Options [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding, Beginning Balance, Options | shares 1,743
Granted, Options | shares 436
Exercised, Options | shares (342)
Canceled/Forfeited, Options | shares (77)
Outstanding, Ending Balance, Options | shares 1,760
Exercisable, Ending Balance, Options | shares 666
Outstanding, Beginning Balance, Weighted-Average Exercise Price per Share | $ / shares $ 70.88
Granted, Weighted-Average Exercise Price per Share | $ / shares 79.60
Exercised, Weighted-Average Exercise Price per Share | $ / shares 70.96
Canceled/Forfeited, Weighted-Average Exercise Price per Share | $ / shares 72.45
Outstanding, Ending Balance, Weighted-Average Exercise Price per Share | $ / shares 72.96
Exercisable, Ending Balance, Weighted-Average Exercise Price per Share | $ / shares $ 73.96