Pension and Savings Plans - Net Periodic Benefit Expense (Detail) $ in Thousands	12 Months Ended
	Aug. 25, 2018 USD ($)
Pension and Savings Plans
Interest cost	$ 10,356
Expected return on plan assets	(18,997)
Recognized net actuarial losses	10,736
Settlement loss	130,263
Net periodic benefit expense	$ 132,358