v3.25.0.1
Cash Equivalents and Marketable Securities - Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 26, 2025
Jan. 28, 2024
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 42,062 $ 25,684
Unrealized Gain 100 56
Unrealized Loss (56) (16)
Estimated Fair Value 42,106 25,724
Cash Equivalents 7,866 7,020
Marketable Securities   18,704
Estimated fair Value, Total 42,487  
Marketable Securities, Total 34,621  
Level 1    
Debt Securities, Available-for-sale [Line Items]    
Publicly-held equity securities 0 225
Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 18,504 10,126
Unrealized Gain 51 31
Unrealized Loss (29) (5)
Estimated Fair Value 18,526 10,152
Cash Equivalents 2,071 2,231
Marketable Securities 16,455 7,921
Debt securities issued by the U.S. Treasury    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 16,749 9,517
Unrealized Gain 42 17
Unrealized Loss (22) (10)
Estimated Fair Value 16,769 9,524
Cash Equivalents 1,801 1,315
Marketable Securities 14,968 8,209
Money market funds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 3,760 3,031
Unrealized Gain 0 0
Unrealized Loss 0 0
Estimated Fair Value 3,760 3,031
Cash Equivalents 3,760 3,031
Marketable Securities 0 0
Debt securities issued by U.S. government agencies    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,775 2,326
Unrealized Gain 7 8
Unrealized Loss (5) (1)
Estimated Fair Value 2,777 2,333
Cash Equivalents 0 89
Marketable Securities 2,777 2,244
Foreign government bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 177 174
Unrealized Gain 0 0
Unrealized Loss 0 0
Estimated Fair Value 177 174
Cash Equivalents 137 60
Marketable Securities 40 114
Certificates of deposit    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 97 510
Unrealized Gain 0 0
Unrealized Loss 0 0
Estimated Fair Value 97 510
Cash Equivalents 97 294
Marketable Securities 0 $ 216
Total debt securities with fair value adjustments recorded in other comprehensive income    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 42,062  
Unrealized Gain 100  
Unrealized Loss (56)  
Estimated Fair Value 42,106  
Cash Equivalents 7,866  
Marketable Securities 34,240  
Publicly-held equity securities    
Debt Securities, Available-for-sale [Line Items]    
Publicly-held equity securities 381  
Net unrealized gains on investments 163  
Net realized gain on equity securities $ 88