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Consolidated Statements of Income and Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Aug. 31, 2019	Aug. 25, 2018	Aug. 26, 2017
Income Statement [Abstract]
Amortization of prior service credit, tax	$ 0	$ 0	$ 15,409
Amortization of net actuarial loss, tax	10	11	5,976
Increase in actuarial loss, tax	0	0	35
Plan amendment, tax	0	0	2,402
Change in fair value of interest rate swap, tax	$ 454	$ 840	$ 314

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Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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