Fair Value Measurements (Estimated Fair Value Of Company Long Term Debt) (Details) - USD ($) $ in Millions	Jul. 30, 2022	Jul. 31, 2021
Long-term debt	$ 2,506	$ 3,298
Notional Amount
Long-term debt	3,007	3,296
Carrying Amount
Long-term debt	$ 2,995	$ 3,295

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant