Shareholders' Equity - Additional Information (Detail) - USD ($)	Oct. 31, 2015	Oct. 20, 2015	May. 02, 2015	Nov. 01, 2014
Class of Stock [Line Items]
Treasury stock, shares	34,961,000		34,841,000	34,519,000
Treasury stock, at cost	$ 1,081,803,000		$ 1,079,716,000	$ 1,072,069,000
Maximum
Class of Stock [Line Items]
Number of shares authorized to be repurchase		$ 50,000,000
Stock Repurchase Program
Class of Stock [Line Items]
Treasury stock, shares	34,961,275
Treasury stock, at cost	$ 1,081,803,000