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Derivative Instruments - Effect of Derivative Instruments Not Designated as Hedges on Consolidated Statement of Operations (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2021	Jul. 25, 2020	Jul. 27, 2019
Derivative Instruments, Gain (Loss) [Line Items]
GAINS (LOSSES) FOR  THE YEARS ENDED	$ 179	$ 19	$ (52)
Foreign currency derivatives | Other income (loss), net
Derivative Instruments, Gain (Loss) [Line Items]
GAINS (LOSSES) FOR  THE YEARS ENDED	2	(5)	(60)
Total return swaps—deferred compensation | Operating expenses and other
Derivative Instruments, Gain (Loss) [Line Items]
GAINS (LOSSES) FOR  THE YEARS ENDED	157	15	5
Equity derivatives | Other income (loss), net
Derivative Instruments, Gain (Loss) [Line Items]
GAINS (LOSSES) FOR  THE YEARS ENDED	$ 20	$ 9	$ 3

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959

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- Definition

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+ References

No definition available.

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