Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jul. 29, 2021	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Class of Stock
Number of shares authorized to be repurchased (in shares)		13,000,000
Purchase of treasury stock		$ 170.6	$ 142.2	$ 94.3
Remaining number of shares authorized to be repurchased (in shares)		5,400,000
Dividends paid per share (in dollars per share)		$ 0.89	$ 0.85
Cash dividend declared per common share (in dollars per share)	$ 0.23	$ 0.90	$ 0.86	$ 0.84
Treasury Stock
Class of Stock
Stock repurchases (in shares)		2,900,000	2,416,741