Short-term Borrowing and Long-term Debt (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 28, 2024	Jul. 30, 2023	Jul. 31, 2022
Debt Instrument [Line Items]
Letters of Credit Outstanding, Amount	$ 28
Payments related to extinguishment of debt	0	$ 0	$ 453
Loss on extinguishment of debt	0	0	4
Long-term borrowings	2,496	500	0
Long-term Debt, Gross	2,500
Other Long-Term Debt, Current	$ 1,150	$ 0
Interest Expense [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt			4
Loss on Extinguishment of Debt, before Write off of Debt Issuance Cost			3
Commercial Paper [Member]
Debt Instrument [Line Items]
Short-term Debt, Weighted Average Interest Rate, at Point in Time	5.60%	5.43%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,850
Line of Credit Facility, Expiration Date	Apr. 16, 2029
Line of Credit Facility Utilized Borrowing Capacity	$ 1
Line Of Credit Facility Additional Borrowing Capacity Subject to Conditions	$ 500
Line of Credit Facility, Covenant Terms	minimum consolidated interest coverage ratio of consolidated adjusted EBITDA to consolidated interest expense of not less than 3.25:1.00, and customary events of default for credit facilities of this type
3.65% notes, due 2023
Debt Instrument [Line Items]
Repayments of Debt		$ 566
Debt Instrument, Maturity Date		Mar. 15, 2023
Debt Instrument, Interest Rate, Stated Percentage		3.65%
2.50% notes, due 2023
Debt Instrument [Line Items]
Repayments of Debt			$ 450
Debt Instrument, Maturity Date			Aug. 02, 2022
Payments related to extinguishment of debt			$ 453
Debt Instrument, Interest Rate, Stated Percentage			2.50%
Variable Interest Rate due 2025
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 500
Line of Credit Facility, Covenant Terms		minimum consolidated interest coverage ratio of consolidated adjusted EBITDA to consolidated interest expense (as each is defined in the 2022 DDTL Credit Agreement) of not less than 3.25:1.00
Debt Instrument, Maturity Date	Nov. 15, 2025
Long-term borrowings		$ 500
Long-term Debt, Gross	$ 400	500
Debt Instrument, Repurchased Face Amount	$ 100
5.30% notes, due 2026
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Mar. 20, 2026
Debt Instrument, Interest Rate, Stated Percentage	5.30%
Long-term Debt, Gross	$ 400	0
Debt Instrument, Redemption Price, Percentage	101.00%
5.20% notes, due 2027
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Mar. 19, 2027
Debt Instrument, Interest Rate, Stated Percentage	5.20%
Long-term Debt, Gross	$ 500	0
Debt Instrument, Redemption Price, Percentage	101.00%
5.20% notes, due 2029
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Mar. 21, 2029
Debt Instrument, Interest Rate, Stated Percentage	5.20%
Long-term Debt, Gross	$ 600	0
Debt Instrument, Redemption Price, Percentage	101.00%
5.40% notes, due 2034
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Mar. 21, 2034
Debt Instrument, Interest Rate, Stated Percentage	5.40%
Long-term Debt, Gross	$ 1,000	$ 0
Debt Instrument, Redemption Price, Percentage	101.00%
Delayed Draw Term Loan Due 2024 | Sovos Brands Acquisition
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000
Line of Credit Facility, Expiration Date	Oct. 08, 2024
Line of Credit Facility, Covenant Terms	minimum consolidated interest coverage ratio of consolidated adjusted EBITDA to consolidated interest expense (as each is defined in the 2024 DDTL Credit Agreement) of not less than 3.25:1.00
Proceeds from Lines of Credit	$ 2,000
Line of Credit Facility, Initiation Date	Oct. 10, 2023
Repayments of Lines of Credit	$ 2,000