Summary of Significant Accounting Policies - Additional Information (Detail) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended		12 Months Ended			9 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Nov. 01, 2014	Nov. 02, 2013	Feb. 01, 2014 Week	Feb. 02, 2013	Jan. 31, 2015 Scenario, Forecast Week	Nov. 01, 2014 Outside United States	Nov. 01, 2014 Reinvest Undistributed Earnings	Nov. 01, 2014 Minimum	Nov. 01, 2014 Maximum
Summary Of Significant Accounting Policies [Line Items]
Weeks in the fiscal year					52		52
Share-based compensation	$ 25,700,000	$ 20,900,000	$ 67,671,000	$ 56,638,000
Options to purchase common stock exercised	3.0		4.7
Common stock outstanding	32.3		32.3
Highly liquid investments maximum maturity days			90 days
Short-term investments maturity term										90 days	1 year
Cash and cash equivalents	2,153,625,000	2,010,752,000	2,153,625,000	2,010,752,000	2,149,746,000	1,811,957,000		1,241,200,000	351,200,000
In-transit inventory accrual	661,100,000	622,500,000	661,100,000	622,500,000	451,600,000
Prior period cash flow adjustment				$ 80,000,000