v3.20.4
Fair Value of Financial Assets and Liabilities (Details) - USD ($)
$ in Millions
Jan. 31, 2021
Jan. 26, 2020
Assets    
Cash equivalents and marketable securities $ 11,351 $ 10,781
Investment in non-affiliated entities $ 144 77
2.20% Notes Due 2021    
Liabilities    
Interest rate (as percent) 2.20%  
3.20% Notes Due 2026    
Liabilities    
Interest rate (as percent) 3.20%  
2.85% Notes Due 2030    
Liabilities    
Interest rate (as percent) 2.85%  
3.50% Notes Due 2040    
Liabilities    
Interest rate (as percent) 3.50%  
3.50% Notes Due 2050    
Liabilities    
Interest rate (as percent) 3.50%  
3.70% Notes Due 2060    
Liabilities    
Interest rate (as percent) 3.70%  
Level 1 | Money market funds    
Assets    
Cash equivalents and marketable securities $ 313 7,507
Level 2 | 2.20% Notes Due 2021    
Liabilities    
Long-term debt 1,011 1,006
Level 2 | 3.20% Notes Due 2026    
Liabilities    
Long-term debt 1,124 1,065
Level 2 | 2.85% Notes Due 2030    
Liabilities    
Long-term debt 1,654 0
Level 2 | 3.50% Notes Due 2040    
Liabilities    
Long-term debt 1,152 0
Level 2 | 3.50% Notes Due 2050    
Liabilities    
Long-term debt 2,308 0
Level 2 | 3.70% Notes Due 2060    
Liabilities    
Long-term debt 602 0
Level 2 | Corporate debt securities    
Assets    
Cash equivalents and marketable securities 4,444 592
Level 2 | Debt securities issued by United States government agencies    
Assets    
Cash equivalents and marketable securities 2,976 1,096
Level 2 | Debt securities issued by the United States Treasury    
Assets    
Cash equivalents and marketable securities 2,846 1,358
Level 2 | Certificates of deposit    
Assets    
Cash equivalents and marketable securities 705 27
Level 2 | Foreign government bonds    
Assets    
Cash equivalents and marketable securities 67 200
Level 2 | Asset-backed securities    
Assets    
Cash equivalents and marketable securities 0 1
Level 3    
Assets    
Investment in non-affiliated entities $ 144 $ 77