Financial Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
Jul. 30, 2021	Jul. 31, 2020
Equity Securities and Other Investments
Gain (Loss) on Securities [Line Items]
Net unrealized gains on equity and other investments still held	$ 15	$ 12

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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