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Fair Value Measurements (Tables) | 3 Months Ended
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Oct. 31, 2020
Fair Value Disclosures [Abstract] |
Financial assets and liabilities measured at fair value on recurring basis | The following table summarizes financial assets and financial liabilities that we measured at fair value on a recurring basis at the dates indicated, classified in accordance with the fair value hierarchy described above.
| October 31, 2020 |  | July 31, 2020
(In millions) | Level 1 |  | Level 2 |  |  |  | Total Fair Value |  | Level 1 |  | Level 2 |  |  |  | Total Fair Value
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash equivalents, primarily money market funds and time deposits | $ | 4,016 |  |  | $ | — |  |  |  |  | $ | 4,016 |  |  | $ | 5,765 |  |  | $ | — |  |  |  |  | $ | 5,765 |
Available-for-sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal bonds | — |  |  | 17 |  |  |  |  | 17 |  |  | — |  |  | 9 |  |  |  |  | 9 |
Corporate notes | — |  |  | 747 |  |  |  |  | 747 |  |  | — |  |  | 752 |  |  |  |  | 752 |
U.S. agency securities | — |  |  | 55 |  |  |  |  | 55 |  |  | — |  |  | 47 |  |  |  |  | 47 |
Total available-for-sale debt securities | — |  |  | 819 |  |  |  |  | 819 |  |  | — |  |  | 808 |  |  |  |  | 808 |
Total assets measured at fair value on a recurring basis | $ | 4,016 |  |  | $ | 819 |  |  |  |  | $ | 4,835 |  |  | $ | 5,765 |  |  | $ | 808 |  |  |  |  | $ | 6,573 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes(1) | $ | — |  |  | $ | 2,013 |  |  |  |  | $ | 2,013 |  |  | $ | — |  |  | $ | 2,042 |  |  |  |  | $ | 2,042 |
Cash equivalents and available-for-sale debt and equity securities by balance sheet classification and level in the fair value hierarchy | The following table summarizes our cash equivalents and available-for-sale debt securities by balance sheet classification and level in the fair value hierarchy at the dates indicated.
| October 31, 2020 |  | July 31, 2020
(In millions) | Level 1 |  | Level 2 |  |  |  | Total Fair Value |  | Level 1 |  | Level 2 |  |  |  | Total Fair Value
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
In cash and cash equivalents | $ | 4,016 |  |  | $ | — |  |  |  |  | $ | 4,016 |  |  | $ | 5,765 |  |  | $ | — |  |  |  |  | $ | 5,765 |
Available-for-sale debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
In investments | $ | — |  |  | $ | 619 |  |  |  |  | $ | 619 |  |  | $ | — |  |  | $ | 608 |  |  |  |  | $ | 608 |
In funds held for customers | — |  |  | 200 |  |  |  |  | 200 |  |  | — |  |  | 200 |  |  |  |  | 200 |
Total available-for-sale debt securities | $ | — |  |  | $ | 819 |  |  |  |  | $ | 819 |  |  | $ | — |  |  | $ | 808 |  |  |  |  | $ | 808 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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