Cash Equivalents and Investments (Tables)

12 Months Ended

Jan. 31, 2023

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Costs, Unrealized Gains and Losses and Estimated Fair Value of Cash Equivalents and Short-term Investments

The following tables present the amortized cost, unrealized gain (loss) and estimated fair value of cash equivalents and short-term investments:

	As of January 31, 2023
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
	(dollars in millions)
Cash equivalents:
Money market funds	$	133	$	—	$	—	$	133
Total cash equivalents	133		—		—		133
Short-term investments:
U.S. treasury securities	2,207		—		(22)		2,185
Corporate debt securities	133		—		(2)		131
Total short-term investments	2,340		—		(24)		2,316
Total	$	2,473	$	—	$	(24)	$	2,449

	As of January 31, 2022
	Amortized Cost		Unrealized Gain		Unrealized Loss		Estimated Fair Value
	(dollars in millions)
Cash equivalents:
Money market funds	$	152	$	—	$	—	$	152
Total cash equivalents	152		—		—		152
Short-term investments:
U.S. treasury securities	1,922		—		(9)		1,913
Corporate debt securities	331		—		(2)		329
Total short-term investments	2,253		—		(11)		2,242
Total	$	2,405	$	—	$	(11)	$	2,394

Schedule of Contractual Maturities of Short-term Investments

The following table presents the contractual maturities of the Company's short-term investments:

	As of January 31, 2023
	Amortized Cost		Estimated Fair Value
	(dollars in millions)
Due within one year	$	2,097	$	2,076
Due between one to five years	243		240
Total	$	2,340	$	2,316

Schedule of Unrealized Loss Position and Fair Value of Debt Securities

The following table presents the fair values and unrealized losses related to the Company's investments in available-for-sale debt securities classified by length of time that the securities have been in a continuous unrealized loss position as of January 31, 2023:

	Less Than 12 Months				More Than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
	(dollars in millions)
U.S. treasury securities	$	1,204	$	(9)	$	846	$	(13)	$	2,050	$	(22)
Corporate debt securities	13		—		114		(2)		127		(2)
Total	$	1,217	$	(9)	$	960	$	(15)	$	2,177	$	(24)