Convertible Senior Notes, Net - Schedule of Convertible Debt (Details) - Senior Notes - USD ($) $ in Millions	Jan. 31, 2023	Jan. 31, 2022
2023 Notes
Liability component:
Principal	$ 0	$ 17
Less: unamortized debt issuance costs and debt discount	0	(1)
Net carrying amount	0	16
2025 Notes
Liability component:
Principal	1,060	1,060
Less: unamortized debt issuance costs and debt discount	(8)	(149)
Net carrying amount	1,052	911
2026 Notes
Liability component:
Principal	1,150	1,150
Less: unamortized debt issuance costs and debt discount	(9)	(245)
Net carrying amount	$ 1,141	905
Additional Paid-in Capital | 2023 Notes
Equity component:
Notes		4
Less: issuance costs		0
Carrying amount of the equity component		4
Additional Paid-in Capital | 2025 Notes
Equity component:
Notes		221
Less: issuance costs		(4)
Carrying amount of the equity component		217
Additional Paid-in Capital | 2026 Notes
Equity component:
Notes		310
Less: issuance costs		(4)
Carrying amount of the equity component		$ 306