Note 11 - Share-based Compensation - Intrinsic Value of Options Outstanding and Exercisable (Details) - USD ($) $ in Millions	Jul. 29, 2023	Jul. 30, 2022
Outstanding	$ 2	$ 5
Outstanding and exercisable	$ 2	$ 3

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant