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Capital Stock - Repurchase of Common Stock (Details) - USD ($)		3 Months Ended		6 Months Ended	12 Months Ended
	Sep. 09, 2015	Apr. 29, 2017	Jan. 28, 2017	Jan. 27, 2018	Jan. 26, 2019	Jul. 29, 2017	Jul. 30, 2016	Aug. 29, 2018
Stockholders' Equity Note [Abstract]
Stock Repurchase Program, Authorized Amount		$ 75,000,000.0						$ 150,000,000
Repurchase of common stock, shares	805,000	400,000	313,006	200,000		713,006	2,511,578
Total Consideration (In thousands)		$ 37,900,000	$ 25,000,000	$ 16,875,000	$ 0	$ 62,909,000	$ 169,997,000
Average Price Per Share (in dollars per share)	$ 74.53	$ 94.77	$ 79.87	$ 84.38		$ 88.23	$ 67.69
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 95,200,000	$ 150,000,000		$ 100,000,000	$ 95,200,000

X

- Definition

The total costs of shares repurchased during the period divided by the total number of shares that have been repurchased during the period which have not been retired and are not held in treasury.

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The cash outflow to reacquire common stock during the period.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased and retired during the period.

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