Supplemental Financial Statement Data (Schedule of Balance Sheets) (Details) - USD ($) $ in Millions	Jan. 27, 2019	Jul. 29, 2018
Inventory, Net [Abstract]
Inventory, raw materials, containers and supplies	$ 465	$ 478
Inventory, finished products	611	721
Inventories	$ 1,076	$ 1,199

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

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- Definition

Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.BB)
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