Summary of Unaudited Quarterly Financial Information (Parenthetical) (Detail) (USD $)	3 Months Ended				12 Months Ended
	Jul. 26, 2013	Jan. 25, 2013	Jul. 27, 2012	Apr. 27, 2012	Oct. 25, 2013	Oct. 26, 2012	Oct. 28, 2011
Quarterly Financial Information [Line Items]
Unrecognized tax benefit reductions resulting from lapse of applicable statute of limitations and change in enacted tax rate	$ 8,200,000	$ 3,700,000	$ 4,600,000
Goodwill impairment charge	3,500,000		52,200,000		3,454,000	52,169,000	0
Other pending charges	10,000,000				10,000,000
Gain on settlement of a contingency, net of tax				$ 9,500,000