Stockholders' Equity And Stock-Based Compensation (Stock Repurchase Authorizations) (Details) - USD ($) $ in Thousands	Apr. 01, 2022	Feb. 03, 2022	Jul. 29, 2021	Jul. 31, 2019	Jul. 25, 2018	Jan. 25, 2017	Oct. 31, 2014	Feb. 29, 2012	Jul. 31, 2011	Jul. 31, 2010	Nov. 30, 2009
Equity, Class of Treasury Stock [Line Items]
Authorization Amount	$ 2,600,000										$ 250,000
Additional Stock Approved [Member]
Equity, Class of Treasury Stock [Line Items]
Authorization Amount		$ 250,000	$ 350,000	$ 350,000	$ 350,000	$ 200,000	$ 200,000	$ 100,000	$ 250,000	$ 300,000