
	January 31, 2021
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value		Reported as
									Cash Equivalents		Marketable Securities

	(In millions)
Corporate debt securities	$	4,442	$	2	$	—	$	4,444	$	234	$	4,210
Debt securities issued by United States government agencies	2,975		1		—		2,976		28		2,948
Debt securities issued by the United States Treasury	2,846		—		—		2,846		25		2,821
Certificates of deposit	705		—		—		705		37		668
Money market funds	313		—		—		313		313		—
Foreign government bonds	67		—		—		67				67


Total	$	11,348	$	3	$	—	$	11,351	$	637	$	10,714


	January 26, 2020
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value		Reported as
									Cash Equivalents		Marketable Securities

	(In millions)
Money market funds	$	7,507	$	—	$	—	$	7,507	$	7,507	$	—
Debt securities issued by the United States Treasury	1,358		—		—		1,358		1,358		—
Debt securities issued by United States government agencies	1,096		—		—		1,096		1,096		—
Corporate debt securities	592		—		—		592		592		—
Foreign government bonds	200		—		—		200		200		—
Certificates of deposit	27		—		—		27		27		—
Asset-backed securities	1		—		—		1		—		1

Total	$	10,781	$	—	$	—	$	10,781	$	10,780	$	1

The amortized cost and estimated fair value of cash equivalents and marketable securities as of January 31, 2021 and January 26, 2020 are shown below by contractual maturity.


	January 31, 2021				January 26, 2020
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value

	(In millions)
Less than one year	$	10,782	$	10,783	$	10,781	$	10,781
Due in 1 - 5 years	566		568		—		—

Total	$	11,348	$	11,351	$	10,781	$	10,781