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Fair Value (Tables) | 12 Months Ended
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Jul. 27, 2019
Fair Value Disclosures [Abstract] |
Assets and Liabilities Measured at Fair Value on a Recurring Basis | Assets and liabilities measured at fair value on a recurring basis were as follows (in millions):
| JULY 27, 2019 |  | JULY 28, 2018
| FAIR VALUE MEASUREMENTS |  | FAIR VALUE MEASUREMENTS
| Level 1 |  | Level 2 |  | Total Balance |  | Level 1 |  | Level 2 |  | Total Balance
Assets: |  |  |  |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |
Money market funds | $ | 10,083 |  |  | $ | — |  |  | $ | 10,083 |  |  | $ | 6,890 |  |  | $ | — |  |  | $ | 6,890 |
Available-for-sale debt investments: |  |  |  |  |  |  |  |  |  |  |
U.S. government securities | — |  |  | 808 |  |  | 808 |  |  | — |  |  | 7,275 |  |  | 7,275 |
U.S. government agency securities | — |  |  | 169 |  |  | 169 |  |  | — |  |  | 727 |  |  | 727 |
Non-U.S. government and agency securities | — |  |  | — |  |  | — |  |  | — |  |  | 208 |  |  | 208 |
Corporate debt securities | — |  |  | 19,262 |  |  | 19,262 |  |  | — |  |  | 27,364 |  |  | 27,364 |
U.S. agency mortgage-backed securities | — |  |  | 1,421 |  |  | 1,421 |  |  | — |  |  | 1,435 |  |  | 1,435 |
Equity investments: |  |  |  |  |  |  |  |  |  |  |
Marketable equity securities | 3 |  |  | — |  |  | 3 |  |  | 605 |  |  | — |  |  | 605 |
Derivative assets | — |  |  | 89 |  |  | 89 |  |  | — |  |  | 2 |  |  | 2 |
Total | $ | 10,086 |  |  | $ | 21,749 |  |  | $ | 31,835 |  |  | $ | 7,495 |  |  | $ | 37,011 |  |  | $ | 44,506 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |
Derivative liabilities | $ | — |  |  | $ | 15 |  |  | $ | 15 |  |  | $ | — |  |  | $ | 74 |  |  | $ | 74 |
Total | $ | — |  |  | $ | 15 |  |  | $ | 15 |  |  | $ | — |  |  | $ | 74 |  |  | $ | 74 |
Fair Value on A Nonrecurring Basis | The following table presents gains and losses on assets that were measured at fair value on a nonrecurring basis (in millions):
| TOTAL GAINS (LOSSES) FOR THE YEARS ENDED
| July 27, 2019 |  | July 28, 2018 |  | July 29, 2017
Non-marketable equity securities and equity method investments | $ | (32 | ) |  | $ | (62 | ) |  | $ | (177 | )
Purchased intangible assets (impaired) | — |  |  | (1 | ) |  | (47 | )
Property held for sale - land and buildings | — |  |  | 20 |  |  | (30 | )
Total gains (losses) for nonrecurring measurements | $ | (32 | ) |  | $ | (43 | ) |  | $ | (254 | )

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 3: 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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