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Financial Instruments (Derivatives Not Designated As Hedges) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2023 | May 01, 2022 | Apr. 30, 2023 | May 01, 2022
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of (Gain) or Loss Recognized in Earnings on Derivatives | $ 18 | $ (6) | $ 5 | $ (25)
Foreign Exchange Forward Contracts [Member] | Cost Of Products Sold [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of (Gain) or Loss Recognized in Earnings on Derivatives | 0 | 0 | (1) | 0
Commodity Derivative Contracts [Member] | Cost Of Products Sold [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of (Gain) or Loss Recognized in Earnings on Derivatives | 18 | (9) | 7 | (28)
Equity Contracts [Member] | General and Administrative Expense [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of (Gain) or Loss Recognized in Earnings on Derivatives | $ 0 | $ 3 | $ (1) | $ 3

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