Fair Value Measurements (Tables)

12 Months Ended

Jan. 31, 2023

Fair Value Disclosures [Abstract]

Schedule of Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables present information about financial assets that were measured at fair value on a recurring basis using the above input categories:

	As of January 31, 2023
	Level 1		Level 2		Level 3		Total
	(dollars in millions)
Assets:
Cash equivalents:
Money market funds	$	133	$	—	$	—	$	133
Total cash equivalents	133		—		—		133
Short-term investments:
U.S. treasury securities	—		2,185		—		2,185
Corporate debt securities	—		131		—		131
Total short-term investments	—		2,316		—		2,316
Total cash equivalents and short-term investments	$	133	$	2,316	$	—	$	2,449

	As of January 31, 2022
	Level 1		Level 2		Level 3		Total
	(dollars in millions)
Assets:
Cash equivalents:
Money market funds	$	152	$	—	$	—	$	152
Total cash equivalents	152		—		—		152
Short-term investments:
U.S. treasury securities	—		1,913		—		1,913
Corporate debt securities	—		329		—		329
Total short-term investments	—		2,242		—		2,242
Total cash equivalents and short-term investments	$	152	$	2,242	$	—	$	2,394

Schedule of Carrying Amounts and Estimated Fair Values of Convertible Note

The following table presents the principal amounts and estimated fair values of financial instruments that are not recorded at fair value on the consolidated balance sheets:

	As of January 31, 2023
	Principal Amount		Estimated Fair Value
	(dollars in millions)
2025 convertible senior notes	$	1,060	$	933
2026 convertible senior notes	$	1,150	$	981