Summary of Unaudited Quarterly Financial Information (Parenthetical) (Detail) (USD $)	3 Months Ended		12 Months Ended
	Jul. 26, 2013	Jan. 25, 2013	Oct. 31, 2014	Oct. 25, 2013	Oct. 26, 2012
Quarterly Financial Information Disclosure [Abstract]
Unrecognized tax benefit reductions resulting from lapse of applicable statute of limitations and change in enacted tax rate	$ 8,200,000	$ 3,700,000
Impairment charge	3,500,000		0	3,454,000	52,169,000
Other pending charges	$ 10,000,000