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Accrued Insurance Claims (Details) (USD $) | Apr. 27, 2013 | Jul. 28, 2012
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Accrued Insurance Claims [Line Items] |  |
Aggregate stop loss coverage for automobile liability, general liability and workers' compensation claims | $ 52,500,000 |
Aggregate Stop Loss Coverge for Automobile Liability, General Liability, and Workers' Compensation Claims Before Adjustment Increase | 41,800,000 |
Insurance Liability, Retained Risk of Loss, Annual basis | 250,000 |
Retained risk of loss per participant for employee health plan for claim amounts that aggregate across all participants in excess of $250,000 | 550,000 |
Insurance Liability, Retained Risk of Loss, Employee Health Plan Threshold | 250,000 |
Amounts expected to be paid within one year: |  |
Accrued auto, general liability and workers' compensation | 18,020,000 | 16,514,000
Accrued employee group health | 4,361,000 | 2,867,000
Accrued damage claims | 5,848,000 | 5,837,000
Accrued insurance claims | 28,229,000 | 25,218,000
Amounts expected to be paid beyond one year: |  |
Accrued auto, general liability and workers' compensation | 24,062,000 | 21,423,000
Accrued damage claims | 2,332,000 | 2,168,000
Accrued insurance claims, Noncurrent | 26,394,000 | 23,591,000
Total accrued insurance claims | 54,623,000 | 48,809,000
Maximum |  |
Accrued Insurance Claims [Line Items] |  |
Retained risk of loss, general liability and workers' compensation, maximum automobile liability | $ 1,000,000.0 |

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, and workers compensation. Used to reflect the Noncurrent portion of the liabilities. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, and workers compensation. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, workers compensation, employee group health, and damage claims. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from auto liability, general liability, workers compensation, employee group health, and damage claims. Used to reflect the Noncurrent portion of the liabilities. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from damage claims. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from damage claims. Used to reflect the Noncurrent portion of the liabilities. + References No definition available. + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable to insurance entities and/or claimants to mitigate potential losses from employee group health. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References No definition available. + Details
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