Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value) (Details) (USD $) In Thousands	Oct. 30, 2010	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member]	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Money Market Funds [Member]		Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Money Market Funds [Member] Quoted Prices In Active Markets For Identical Instruments (Level 1) [Member]		Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Derivative Assets [Member]	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Derivative Assets [Member] Significant Other Observable Inputs (Level 2) [Member]	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Corporate Bonds [Member]	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Corporate Bonds [Member] Significant Other Observable Inputs (Level 2) [Member]	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Quoted Prices In Active Markets For Identical Instruments (Level 1) [Member]	Jul. 30, 2011 Fair Value, Measurements, Recurring [Member] Significant Other Observable Inputs (Level 2) [Member]	Oct. 30, 2010 Money Market Funds [Member]		Oct. 30, 2010 Money Market Funds [Member] Quoted Prices In Active Markets For Identical Instruments (Level 1) [Member]		Oct. 30, 2010 Derivative Assets [Member]	Oct. 30, 2010 Derivative Assets [Member] Significant Other Observable Inputs (Level 2) [Member]	Oct. 30, 2010 Corporate Bonds [Member]	Oct. 30, 2010 Corporate Bonds [Member] Significant Other Observable Inputs (Level 2) [Member]	Oct. 30, 2010 Quoted Prices In Active Markets For Identical Instruments (Level 1) [Member]	Oct. 30, 2010 Significant Other Observable Inputs (Level 2) [Member]
Money market funds			$ 89,168	[1]	$ 89,168	[1]							$ 92,981	[1]	$ 92,981	[1]
Corporate bonds									781	781									1,998	1,998
Derivative assets							3,941	3,941									6,450	6,450
Total assets measured at fair value	$ 101,429	$ 93,890									$ 89,168	$ 4,722									$ 92,981	$ 8,448

[1] Money market funds are reported within "Cash and cash equivalents" on the Condensed Consolidated Balance Sheets.