v3.19.3.a.u2
Fair Value of Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Jan. 26, 2020
Jan. 27, 2019
Assets    
Cash equivalents and marketable securities $ 10,781 $ 7,324
3.20% Notes Due 2026    
Liabilities    
Interest rate (as percent) 3.20%  
2.20% Notes Due 2021    
Liabilities    
Interest rate (as percent) 2.20%  
Level 1 | Money market funds    
Assets    
Cash equivalents and marketable securities $ 7,507 483
Level 2 | 3.20% Notes Due 2026    
Liabilities    
Long-term debt [1] 1,065 961
Level 2 | 2.20% Notes Due 2021    
Liabilities    
Long-term debt [1] 1,006 978
Level 2 | Debt securities issued by the United States Treasury    
Assets    
Cash equivalents and marketable securities 1,358 1,492
Level 2 | Debt securities issued by United States government agencies    
Assets    
Cash equivalents and marketable securities 1,096 2,280
Level 2 | Corporate debt securities    
Assets    
Cash equivalents and marketable securities 592 2,620
Level 2 | Foreign government bonds    
Assets    
Cash equivalents and marketable securities 200 209
Level 2 | Certificates of deposit    
Assets    
Cash equivalents and marketable securities 27 0
Level 2 | Asset-backed securities    
Assets    
Cash equivalents and marketable securities 1 151
Level 2 | Mortgage-backed securities issued by United States government-sponsored enterprises    
Assets    
Cash equivalents and marketable securities $ 0 $ 89
[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 the Consolidated Financial Statements for additional information.