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Debt (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Apr. 30, 2023	Apr. 30, 2023	May 01, 2022
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 500	$ 500
Line of Credit Facility, Additional Borrowing Capacity, Covenant Terms		minimum consolidated interest coverage ratio of consolidated adjusted EBITDA to consolidated interest expense (as each is defined in the DDTL Credit Agreement) of not less than 3.25:1.00
Long-term borrowings	$ 500	$ 500	$ 0
Debt Instrument, Interest Rate, Stated Percentage	3.65%	3.65%
Repayments of Long-term Debt	$ 566	$ 566	$ 0
Three Point Six Five Percent Notes
Debt Instrument [Line Items]
Debt Instrument, Maturity Date		Mar. 15, 2023

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