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Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended
--- | --- | ---
Aug. 10, 2011 LegalMatter | Jul. 28, 2012 Year | Jul. 30, 2011 | Jul. 31, 2010
Commitments and Contingencies [Line Items] |  |  |  |  |
Initial terms of lease, period (in years) |  | 10 |  |  |
Option to extend lease, period (in years) |  | 5 |  |  |
Interest and other income, net |  | $ 4.7 |  | $ 1.1 | $ 4.3
Total future minimum rentals |  | 1,702.2 | [1],[2] |  |
Period prior to shipment date to cancel commitments (in days) |  | 30 days |  |  |
Other off-balance sheet firm commitments |  | 573.8 |  |  |
Number of class action lawsuits settled | 1 |  |  |  |
Suffern, New York facility |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |
Number of tenants |  | 2 |  |  |
Interest and other income, net |  | 1.1 |  | 1.8 | 1.8
Minimum |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |
Period of preliminary commitments made in advance of planned receipt (in months) |  | 5 months |  |  |
Maximum |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |
Period of preliminary commitments made in advance of planned receipt (in months) |  | 7 months |  |  |
Chairman or related trusts |  |  |  |  |
Commitments and Contingencies [Line Items] |  |  |  |  |
Number of leased stores |  | 2 |  |  |
Annual future minimum rentals related-party leases |  | 0.4 |  |  |
Total future minimum rentals |  | 1.5 |  |  |
Rent expense on leases |  | $ 0.4 |  | $ 0.4 | $ 0.4
[1] | Net of sublease income, which is not significant in any period.
[2] | Although certain leases are cancelable if specified sales levels are not achieved, future minimum rentals under such leases have been included in the above table.

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- Definition The amount of interest income and other income recognized during the period. Included in this element is interest derived from investments in debt securities, cash and cash equivalents, and other investments which reflect the time value of money or transactions in which the payments are for the use or forbearance of money and other income from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business). + References No definition available. + Details
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