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Employee Benefit Plans - Valuation of Employee Share-Based Awards - Time-Based Restricted Stock Units (Details) - $ / shares shares in Millions | 12 Months Ended
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Jul. 31, 2021 | Jul. 25, 2020 | Jul. 27, 2019
RESTRICTED STOCK UNITS |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares granted (in shares) | 48 | 47 | 43
Grant date fair value per share (in dollars per share) | $ 42.04 | $ 42.68 | $ 47.75
Expected dividend | 3.30% | 3.10% | 2.70%
Range of risk-free interest rates, minimum | 0.00% | 0.00% | 0.00%
Range of risk-free interest rates, maximum | 0.90% | 2.00% | 2.90%
PERFORMANCE BASED RESTRICTED STOCK UNITS |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares granted (in shares) | 2 | 2 | 2
Grant date fair value per share (in dollars per share) | $ 37.91 | $ 41.91 | $ 47.00
Expected dividend | 3.60% | 2.80% | 2.80%
Range of risk-free interest rates, minimum | 0.10% | 1.70% | 2.10%
Range of risk-free interest rates, maximum | 0.40% | 2.00% | 3.00%

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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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=120397183&loc=d3e187085-122770 + Details
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