Cash Equivalents and Marketable Securities - Unrealized Losses Aggregated by Investment Category (Details) - USD ($) $ in Millions	Jan. 26, 2025	Jan. 28, 2024
Estimated Fair Value
Less than 12 Months	$ 12,422	$ 5,319
12 Months or Greater	213	1,696
Total	12,635	7,015
Gross Unrealized Loss
Less than 12 Months	(56)	(9)
12 Months or Greater	0	(7)
Total	(56)	(16)
Debt securities issued by the U.S. Treasury
Estimated Fair Value
Less than 12 Months	6,315	3,343
12 Months or Greater	177	1,078
Total	6,492	4,421
Gross Unrealized Loss
Less than 12 Months	(22)	(5)
12 Months or Greater	0	(5)
Total	(22)	(10)
Corporate debt securities
Estimated Fair Value
Less than 12 Months	5,291	1,306
12 Months or Greater	15	618
Total	5,306	1,924
Gross Unrealized Loss
Less than 12 Months	(29)	(3)
12 Months or Greater	0	(2)
Total	(29)	(5)
Debt securities issued by U.S. government agencies
Estimated Fair Value
Less than 12 Months	816	670
12 Months or Greater	21	0
Total	837	670
Gross Unrealized Loss
Less than 12 Months	(5)	(1)
12 Months or Greater	0	0
Total	$ (5)	$ (1)

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