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Roll-forward of Restructuring Accrual (Detail) (USD $) In Thousands, unless otherwise specified	2 Months Ended	3 Months Ended			8 Months Ended	9 Months Ended
	Mar. 23, 2013	Apr. 27, 2013	Jan. 26, 2013	Oct. 27, 2012	Mar. 23, 2013	Apr. 27, 2013
Restructuring Cost and Reserve [Line Items]
Charges	$ 694	$ 4,003	$ 264	$ 1,988	$ 2,946
Payments						5,958
Accrual Balance at April 27, 2013	3,309	297			3,309	297
Workforce reduction
Restructuring Cost and Reserve [Line Items]
Charges		4,003	264	1,577
Payments						5,617
Accrual Balance at April 27, 2013		227				227
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Charges				411
Payments						341
Accrual Balance at April 27, 2013		$ 70				$ 70

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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