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Debt And Capital Lease Obligations (Private Placement Debt) (Narrative) (Details) - Private Placement Debt [Member] | 12 Months Ended |
--- | --- | ---
Sep. 02, 2017 USD ($) | Sep. 03, 2016 USD ($)
Debt Instrument [Line Items] |  |
Maximum consolidated leverage ratio of total indebtedness to EBITDA | 3.00 |
Maximum consolidated leverage ratio of total indebtedness to EBITDA after material acquisition | 3.50 |
Minimum consolidated interest coverage ratio of EBITDA to total interest expense | 3.00 |
Senior Notes Series A [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 75,000,000 | $ 75,000,000
Interest rate | 2.65% |
Maturity date | Jul. 28, 2023 |
Senior Notes Series B [Member] |  |
Debt Instrument [Line Items] |  |
Principal amount | $ 100,000,000 | $ 100,000,000
Interest rate | 2.90% |
Maturity date | Jul. 28, 2026 |

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