Derivative Instruments and Hedging Activities (Details) (USD $) In Thousands	12 Months Ended
Jul. 29, 2011	Jul. 30, 2010	Jul. 31, 2009
Derivatives, Fair Value [Line Items]
Estimated pre-tax portion of AOCL that is expected to be reclassified into earnings over the next twelve months	$ 28,275
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from AOCL into Income (Effective Portion)	30,355	30,722	19,469
Interest Rate Swap Liability [Member] \| Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Fair Value	51,604	66,281
Reduction in the fair value of the interest rate swap liability related to non-performance risk	1,546	3,915
Interest Rate Swap [Member] \| Cash Flow Hedging [Member] \| Other Comprehensive Income (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Income (Loss) Recognized in AOCL on Derivative (Effective Portion)	14,677	(5,049)	(21,614)
Interest Rate Swap [Member] \| Cash Flow Hedging [Member] \| Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Reclassified from AOCL into Income (Effective Portion)	$ 30,355	$ 30,722	$ 19,469

The adjustment to the fair value of the entity's interest rate swap liability related to its non-performance risk.

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Fair value as of the balance sheet date of the gross assets less the gross liabilities of a derivative liability or group of derivative liabilities.

+ References

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The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-Paragraph 45
-Subparagraph b(1)
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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

+ References

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Amount of unrealized gain (loss) related to the increase or decrease in fair value of interest rate derivatives designated as cash flow hedging instruments, which was recorded in accumulated other comprehensive income to the extent that the cash flow hedge was determined to be effective.

+ References

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-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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