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Fair Value of Financial Assets and Liabilities | 12 Months Ended
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Jan. 31, 2021
Fair Value Disclosures [Abstract] |
Fair Value of Financial Assets and Liabilities | Fair Value of Financial Assets and Liabilities The fair values of our financial assets and liabilities are determined using quoted market prices of identical assets or quoted market prices of similar assets from active markets. We review fair value hierarchy classification on a quarterly basis.
|  | 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 The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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