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Employee and Retiree Benefits (Postretirement Benefit Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 29, 2015	Aug. 30, 2014	Aug. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Interest cost	$ 1,382	$ 1,540	$ 1,508
Service cost	427	393	574
Amortization of prior service benfit	(5,538)	(5,650)	(5,170)
Amortization of net actuarial loss	1,465	1,077	1,603
Net periodic postretirement benefit income	$ (2,264)	$ (2,640)	$ (1,485)

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The amount of gains or losses recognized in net periodic benefit cost.

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-Name Accounting Standards Codification



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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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