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Fair Value of Financial Assets and Liabilities
3 Months Ended
Apr. 26, 2020
Fair Value Disclosures [Abstract]  
Fair Value of Financial Assets and Liabilities Fair Value of Financial Assets and LiabilitiesThe 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 CategoryApril 26, 2020January 26, 2020
(In millions)
Assets
Cash equivalents and marketable securities:
Money market fundsLevel 1$11,128  $7,507  
Corporate debt securitiesLevel 2$3,238  $592  
Foreign government bondsLevel 2$870  $200  
Certificates of depositLevel 2$582  $27  
Debt securities issued by United States government agenciesLevel 2$381  $1,096  
Debt securities issued by the United States TreasuryLevel 2$—  $1,358  
Asset-backed securitiesLevel 2$—  $ 
Liabilities
Other noncurrent liabilities:
2.20% Notes Due 2021 (1)Level 2$1,020  $1,065  
3.20% Notes Due 2026 (1)Level 2$1,104  $1,006  
2.85% Notes Due 2030 (1)Level 2$1,635  $—  
3.50% Notes Due 2040 (1)Level 2$1,134  $—  
3.50% Notes Due 2050 (1)Level 2$2,336  $—  
3.70% Notes Due 2060 (1)Level 2$594  $—  
(1) 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 Condensed Consolidated Financial Statements for additional information.