Investments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Aug. 02, 2014	Aug. 03, 2013
Schedule of Available-for-sale Securities [Line Items]
Net unrealized loss on investment	$ (0.2)
Investment on deposits	22.3		[1]
Various State Insurance Departments
Schedule of Available-for-sale Securities [Line Items]
Investment on deposits	$ 7.4

[1] n/a Not applicable as all investments were acquired as part of the Acquisition that occurred during Fiscal 2015.