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Cash Equivalents and Marketable Securities - Schedule of Securities (Details) - USD ($)
$ in Millions
Oct. 26, 2025
Jan. 26, 2025
Summary of cash equivalents and marketable securities:    
Amortized Cost $ 54,580 $ 42,062
Unrealized Gain 373 100
Unrealized Loss (1) (56)
Estimated Fair Value 54,952  
Cash Equivalents 9,699 7,866
Estimated Fair Value, Total 58,821 42,487
Marketable securities, total 49,122 34,621
Total debt securities with fair value adjustments recorded in other comprehensive income    
Summary of cash equivalents and marketable securities:    
Amortized Cost 54,580 42,062
Unrealized Gain 373 100
Unrealized Loss (1) (56)
Estimated Fair Value 54,952 42,106
Cash Equivalents 9,699 7,866
Marketable Securities 45,253 34,240
Debt securities issued by the U.S. Treasury    
Summary of cash equivalents and marketable securities:    
Amortized Cost 22,032 16,749
Unrealized Gain 188 42
Unrealized Loss 0 (22)
Estimated Fair Value 22,220 16,769
Cash Equivalents 665 1,801
Marketable Securities 21,555 14,968
Corporate debt securities    
Summary of cash equivalents and marketable securities:    
Amortized Cost 21,588 18,504
Unrealized Gain 172 51
Unrealized Loss (1) (29)
Estimated Fair Value 21,759 18,526
Cash Equivalents 320 2,071
Marketable Securities 21,439 16,455
Money market funds    
Summary of cash equivalents and marketable securities:    
Amortized Cost 8,610 3,760
Unrealized Gain 0 0
Unrealized Loss 0 0
Estimated Fair Value 8,610 3,760
Cash Equivalents 8,610 3,760
Marketable Securities 0 0
Debt securities issued by U.S. government agencies    
Summary of cash equivalents and marketable securities:    
Amortized Cost 2,206 2,775
Unrealized Gain 12 7
Unrealized Loss 0 (5)
Estimated Fair Value 2,218 2,777
Cash Equivalents 0 0
Marketable Securities 2,218 2,777
Certificates of deposit    
Summary of cash equivalents and marketable securities:    
Amortized Cost 104 97
Unrealized Gain 0 0
Unrealized Loss 0 0
Estimated Fair Value 104 97
Cash Equivalents 104 97
Marketable Securities 0 0
Foreign government bonds    
Summary of cash equivalents and marketable securities:    
Amortized Cost 40 177
Unrealized Gain 1 0
Unrealized Loss 0 0
Estimated Fair Value 41 177
Cash Equivalents 0 137
Marketable Securities 41 40
Publicly-held equity securities    
Summary of cash equivalents and marketable securities:    
Publicly-held equity securities $ 3,869 $ 381