Segment Reporting - Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Aug. 31, 2019	Aug. 25, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 1,133,529	$ 1,058,586
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	1,087,901	1,012,167
Europe, Canada, Mexico and Nicaragua
Revenues From External Customers And Long Lived Assets [Line Items]
Long-lived assets	$ 45,628	$ 46,419