Employee and Retiree Benefits (Postretirement Health Care and Deferred Compensation Benefits) (Details) - USD ($) $ in Thousands	Aug. 26, 2017	Aug. 27, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]
Postretirement health care benefit cost	$ 0	$ 6,346
Non-qualified deferred compensation	16,476	18,003
Executive share option plan liability	1,498	3,341
SERP benefit liability	2,534	2,681
Executive deferred compensation	447	389
Officers stock-based compensation	1,664	763
Total postretirement health care and deferred compensation benefits	22,619	31,523
Less current portion	(3,349)	(4,574)
Long-term postretirement health care and deferred compensation benefits	$ 19,270	$ 26,949

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Amounts due to recorded owners or owners with a beneficial interest of more than 10 percent of the voting interests or officers of the company, which are due after one year (or one business cycle).

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Amount of liability, recognized in statement of financial position, for defined benefit other postretirement plan, classified as noncurrent. Excludes pension plan.

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Amount of liability, recognized in statement of financial position, for pension, other postretirement and postemployment benefits, classified as current.

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans.

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This represents the entire liability recognized in the balance sheet that is associated with the executive deferred compensation plan.

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This represents the entire liability recognized in the balance sheet that is associated with the executive share option plans.

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This represents the entire liability recognized in the balance sheet that is associated with the non-qualified deferred compensation plan.

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This represents the entire liability recognized in the balance sheet that is associated with the postretirement health care benefits.

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This represents the entire liability recognized in the balance sheet that is associated with the SERP benefit plan.

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