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Property, Plant And Equipment (Summary Of Property, Plant And Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Sep. 01, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 792,156	$ 767,082
Less: accumulated depreciation and amortization	481,302	455,397
Total	310,854	311,685
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	28,134	28,154
Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	187,207	186,208
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,135	3,114
Furniture, Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	181,150	185,556
Computer Systems, Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 392,530	$ 364,050
Minimum [Member] | Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	3 years
Minimum [Member] | Furniture, Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	3 years
Minimum [Member] | Computer Systems, Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	3 years
Maximum [Member] | Building And Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	40 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	7 years
Maximum [Member] | Furniture, Fixtures And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	20 years
Maximum [Member] | Computer Systems, Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment estimated useful life	10 years

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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- Definition

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+ References

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- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

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