Aggregate dividends paid during the period for each share of common stock outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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- Definition

Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 25
-Paragraph 19A
-URI http://asc.fasb.org/extlink&oid=96949009&loc=SL79513924-113897

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

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Shareholders' Equity (Additional Information) (Details) - USD ($) $ / shares in Units, shares in Millions	3 Months Ended								12 Months Ended
	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 23, 2016	Oct. 24, 2015	Jul. 29, 2017	Jul. 30, 2016	Jul. 25, 2015
Stockholders' Equity Note [Abstract]
Cash dividends paid per common share (in dollars per share)	$ 0.29	$ 0.29	$ 0.26	$ 0.26	$ 0.26	$ 0.26	$ 0.21	$ 0.21	$ 1.1	$ 0.94	$ 0.80
Payments of dividends									$ 5,511,000,000	$ 4,750,000,000	$ 4,086,000,000
Authorized common stock repurchase amount	$ 112,000,000,000								112,000,000,000
Remaining authorized repurchase amount	$ 11,700,000,000								$ 11,700,000,000
Shares repurchased for tax withholdings on vesting of restricted stock units (in shares)									20	21
Payments related to tax withholding for share-based compensation									$ 619,000,000	$ 557,000,000	$ 502,000,000