Pension and Savings Plans - Net Periodic Benefit Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
Aug. 25, 2018	Aug. 26, 2017	Aug. 27, 2016
Retirement Benefits [Abstract]
Interest cost	$ 10,356	$ 10,335	$ 11,272
Expected return on plan assets	(18,997)	(20,056)	(16,512)
Recognized net actuarial losses	10,736	13,873	10,506
Settlement loss	130,263
Net periodic benefit expense	$ 132,358	$ 4,152	$ 5,266

No definition available.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan.

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Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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