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Fair Value of Financial Assets and Liabilities (Tables) | 12 Months Ended
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Jan. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of fair value of financial assets and liabilities |
|  | Fair Value at
| Pricing Category |  | January 31, 2021 |  | January 26, 2020
|  |  | (In millions)
Assets |  |  |  |  |
Cash equivalents and marketable securities: |  |  |  |  |
Money market funds | Level 1 |  | $ | 313 |  |  | $ | 7,507 |
Corporate debt securities | Level 2 |  | $ | 4,444 |  |  | $ | 592 |
Debt securities issued by United States government agencies | Level 2 |  | $ | 2,976 |  |  | $ | 1,096 |
Debt securities issued by the United States Treasury | Level 2 |  | $ | 2,846 |  |  | $ | 1,358 |
Certificates of deposit | Level 2 |  | $ | 705 |  |  | $ | 27 |
Foreign government bonds | Level 2 |  | $ | 67 |  |  | $ | 200 |
Asset-backed securities | Level 2 |  | $ | — |  |  | $ | 1 |
Other asset: |  |  |  |  |
Investment in non-affiliated entities (1) | Level 3 |  | $ | 144 |  |  | $ | 77 |
Liabilities |  |  |  |  |
2.20% Notes Due 2021 (2) | Level 2 |  | $ | 1,011 |  |  | $ | 1,006 |
3.20% Notes Due 2026 (2) | Level 2 |  | $ | 1,124 |  |  | $ | 1,065 |
2.85% Notes Due 2030 (2) | Level 2 |  | $ | 1,654 |  |  | $ | — |
3.50% Notes Due 2040 (2) | Level 2 |  | $ | 1,152 |  |  | $ | — |
3.50% Notes Due 2050 (2) | Level 2 |  | $ | 2,308 |  |  | $ | — |
3.70% Notes Due 2060 (2) | Level 2 |  | $ | 602 |  |  | $ | — |
(1)Investment in private non-affiliated entities is recorded at fair value on a non-recurring basis only if an impairment or observable price adjustment occurs in the period with changes in fair value recorded through net income. The amount recorded as of January 31, 2021 has not been significant. (2) These liabilities are carried on our Consolidated Balance Sheets at their original issuance value, net of unamortized debt discount and issuance costs, and are not marked to fair value each period. Refer to Note 12 of these Notes to the Consolidated Financial Statements for additional information

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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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