Shareholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended				0 Months Ended	3 Months Ended	9 Months Ended
	May 03, 2013	Apr. 27, 2012	May 03, 2013	Apr. 27, 2012	Aug. 03, 2012		Jun. 03, 2013 Common Stock [Member]	May 03, 2013 Common Stock [Member]	May 03, 2013 Common Stock [Member]
Class of Stock [Line Items]
Proceeds from exercise of share-based compensation awards			$ 5,195	$ 16,729
Exercise of share-based compensation awards (in shares)									329,232
Stock repurchase (in shares)									44,300
Stock repurchase aggregate value									3,570
Cash dividends paid (in dollars per share)									$ 1.40
Dividend record date							Jul. 19, 2013	Apr. 19, 2013
Cash dividends declared (in dollars per share)	$ 0.50	$ 0.65	$ 1.50	$ 1.15			$ 0.75	$ 0.50
Dividend payment date							Aug. 05, 2013	May 06, 2013
Unrealized loss in the fair value of interest rate swaps, net of tax			10,782
Accumulated change in fair value of interest rate swaps, net of tax	10,376		10,376		21,158	[1]
Share-based compensation expense			10,996
Tax benefit realized upon exercise of share-based compensation awards			$ 1,961

[1] This Condensed Consolidated Balance Sheet has been derived from the audited Consolidated Balance Sheet as of August 3, 2012, as filed in the Company's Annual Report on Form 10-K for the fiscal year ended August 3, 2012.