Schedule of Fair Value of Option Granted using Black-Scholes Pricing Model (Detail) (USD $)	9 Months Ended
	Jul. 26, 2013	Jul. 27, 2012
Employee Sharesave Scheme
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Volatility	36.97%	38.96%
Risk-free interest rate	0.40%	0.38%
Expected life (years)	3 years	3 years
Dividends	$ 0	$ 0
Equity Incentive Plan
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Dividends	$ 0	$ 0
Volatility, minimum	41.89%	41.62%
Volatility, maximum	44.25%	44.29%
Risk-free interest rate, minimum	0.79%	0.91%
Risk-free interest rate, maximum	1.88%	2.11%
Equity Incentive Plan | Minimum
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (years)	4 years 6 months	4 years 6 months
Equity Incentive Plan | Maximum
Schedule of Weighted Average Assumptions for Fair Values of Stock Options[Line Items]
Expected life (years)	9 years 6 months	9 years 6 months