Short-term Borrowings and Long-term Debt (Schedule of Long-term Debt Instruments) (Details) - USD ($) $ in Millions		12 Months Ended
		Jul. 30, 2023	Jul. 31, 2022
Debt Instrument [Line Items]
Finance Lease, Liability, Noncurrent		$ 15	$ 16
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	[1]	0	1
Long Term Debt And Finance Lease Obligations Aggregate		4,498	4,561
Long-term Debt, Current Maturities		0	565
Long-term Debt and Lease Obligation		$ 4,498	$ 3,996
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]		Long-term Debt and Lease Obligation	Long-term Debt and Lease Obligation
3.65% notes, due 2023
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.65%
Debt Instrument, Maturity Date		Mar. 15, 2023
Long-term Debt, Gross		$ 0	$ 566
3.95% notes, due 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.95%
Debt Instrument, Maturity Date		Mar. 15, 2025
Long-term Debt, Gross		$ 850	850
3.30% notes, due 2025
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.30%
Debt Instrument, Maturity Date		Mar. 19, 2025
Long-term Debt, Gross		$ 300	300
Variable Interest Rate due 2025
Debt Instrument [Line Items]
Debt Instrument, Description of Variable Rate Basis		Variable-rate
Debt Instrument, Maturity Date		Nov. 15, 2025
Long-term Debt, Gross		$ 500	0
4.15% notes, due 2028
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.15%
Debt Instrument, Maturity Date		Mar. 15, 2028
Long-term Debt, Gross		$ 1,000	1,000
2.375% notes, due 2030
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		2.375%
Debt Instrument, Maturity Date		Apr. 24, 2030
Long-term Debt, Gross		$ 500	500
3.80% notes, due 2043
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.80%
Debt Instrument, Maturity Date		Aug. 02, 2042
Long-term Debt, Gross		$ 163	163
4.80% notes, due 2048
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		4.80%
Debt Instrument, Maturity Date		Mar. 15, 2048
Long-term Debt, Gross		$ 700	700
3.125% notes, due 2050
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		3.125%
Debt Instrument, Maturity Date		Apr. 24, 2050
Long-term Debt, Gross		$ 500	500
Long-term Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	[2]	$ 30	$ 34

[1] Includes unamortized net discount/premium on debt issuances and debt issuance costs.

[2] Includes unamortized net discount/premium on debt issuances and debt issuance costs