Employee Benefit Plans - Valuation of Employee Share-Based Awards - Employee Stock Purchase Rights (Details) - Employee Stock Purchase Rights - $ / shares	12 Months Ended
	Jul. 29, 2023	Jul. 30, 2022	Jul. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	28.70%	27.90%	29.20%
Risk-free interest rate	2.80%	0.10%	0.30%
Expected dividend	3.60%	3.20%	3.20%
Expected life (in years)	1 year 2 months 12 days	1 year 2 months 12 days	1 year 3 months 18 days
Weighted-average estimated grant date fair value per share (in dollars per share)	$ 12.40	$ 12.90	$ 12.46