Earnings Per Share and Shareholders Equity - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Jul. 31, 2015	Aug. 01, 2014	Jul. 31, 2015	Oct. 31, 2014	Mar. 31, 2015	Jun. 19, 2014
Earnings Per Share And Shareholders Equity [Line Items]
Anti-dilutive shares excluded from computation of earnings per share	370,050	170,300
Preferred stock shares authorized	25,000		25,000
Preferred stock, par value	$ 100		$ 100
Common stock, shares authorized	60,000,000		60,000,000	60,000,000
Common stock, par value	$ 0.20		$ 0.20	$ 0.20
Preferred stock shares outstanding	0		0	0
Approved and authorized amount under the stock repurchase program					$ 400,000,000	$ 200,000,000
Additional approved and authorized amount under the stock repurchase program					$ 200,000,000
Stock repurchased during period, shares			2,562,122	269,228
Treasury Stock Acquired, Average Cost Per Share			$ 101.29
Aggregate value of repurchased stock			$ 259,500,000
Series B Preferred Stock
Earnings Per Share And Shareholders Equity [Line Items]
Preferred stock shares authorized	475,000		475,000
Preferred stock, par value	$ 1.00		$ 1.00
Preferred stock shares outstanding	0		0	0