Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 30, 2014	Aug. 31, 2013	Aug. 25, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, pension, taxes	$ 8,287	$ 27,972	$ 29,744
Reclassification from accumulated other comprehensive income, securities, taxes	54	202	69
Reclassification from accumulated other comprehensive income, derivatives, taxes	87	440	4,800
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, pension, taxes	2,683	5,793
Net Unrealized Gain on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, securities, taxes	30	56
Derivatives [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive income, derivatives, taxes	$ 87	$ 440