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Description of Business and Summary of Significant Accounting Policies (Tables) | 6 Months Ended
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Jan. 31, 2020
Accounting Policies [Abstract] |
Composition of shares used in the computation of basic and diluted net income per share | The following table presents the composition of shares used in the computation of basic and diluted net income per share for the periods indicated.
| Three Months Ended |  | Six Months Ended
(In millions, except per share amounts) | January 31, 2020 |  | January 31, 2019 |  | January 31, 2020 |  | January 31, 2019
Numerator: |  |  |  |  |  |  |
Net income | $ | 240 |  |  | $ | 189 |  |  | $ | 297 |  |  | $ | 223 |
Denominator: |  |  |  |  |  |  |
Shares used in basic per share amounts: |  |  |  |  |  |  |
Weighted average common shares outstanding | 261 |  |  | 260 |  |  | 261 |  |  | 260 |
Shares used in diluted per share amounts: |  |  |  |  |  |  |
Weighted average common shares outstanding | 261 |  |  | 260 |  |  | 261 |  |  | 260 |
Dilutive common equivalent shares from stock options |  |  |  |  |  |  |
and restricted stock awards | 3 |  |  | 4 |  |  | 3 |  |  | 4 |
Dilutive weighted average common shares outstanding | 264 |  |  | 264 |  |  | 264 |  |  | 264 |
Basic and diluted net income per share: |  |  |  |  |  |  |
Basic net income per share | $ | 0.92 |  |  | $ | 0.73 |  |  | $ | 1.14 |  |  | $ | 0.86 |
Diluted net income per share | $ | 0.91 |  |  | $ | 0.72 |  |  | $ | 1.13 |  |  | $ | 0.84 |
Shares excluded from diluted net income per share: |  |  |  |  |  |  |
Weighted average stock options and restricted stock units that have been excluded from dilutive common equivalent shares outstanding due to their anti-dilutive effect | — |  |  | 1 |  |  | — |  |  | 1 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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