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Income Taxes (Tables)
 12 Months Ended
Jan. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Domestic and Foreign Components of Pre-tax Loss The domestic and foreign components of pre-tax loss for fiscal 2023, 2022 and 2021 were as follows:
 Year Ended January 31,
 202320222021
(dollars in millions)
Domestic$(834)$(904)$(282)
Foreign33 54 16 
Loss before provision for (benefit from) income taxes$(801)$(850)$(266)
Schedule of Components of Provision for (Benefit from) Income Taxes The components of the provision for (benefit from) income taxes for fiscal 2023, 2022 and 2021 were as follows:
 Year Ended January 31,
 202320222021
(dollars in millions)
Current: 
Federal$— $— $— 
State2 — — 
Foreign5 4 1 
Total current provision for income taxes7 4 1 
Deferred: 
Federal— (8)— 
State— (1)— 
Foreign7 3 (1)
Total deferred provision for (benefit from) income taxes7 (6)(1)
Total provision for (benefit from) income taxes$14 $(2)$— 
Schedule of Effective Income Tax Rate Reconciliation The following is a reconciliation of the statutory federal income tax rate to the Company’s effective tax rate for fiscal 2023, 2022 and 2021:
 Year Ended January 31,
 202320222021
Tax at federal statutory rate21.0 %21.0 %21.0 %
State income taxes, net of federal benefit3.6 3.9 4.1 
Change in valuation allowance(9.9)(36.1)(101.0)
Stock-based compensation(12.3)8.4 70.2 
Research and development credits2.6 3.6 6.4 
Non-deductible expenses(5.4)— — 
Other, net(1.2)(0.6)(0.8)
Effective tax rate(1.6)%0.2 %(0.1)%
Schedule of Deferred Tax Assets and Liabilities The tax effects of temporary differences and related deferred tax assets and liabilities as of January 31, 2023 and 2022 were as follows:
 As of January 31,
 20232022
(dollars in millions)
Deferred tax assets: 
Net operating loss carryforwards$817 $955 
Capitalized research expenditures189 — 
Stock-based compensation52 48 
Operating lease liabilities43 50 
Other reserves and accruals31 40 
Research and development and other credits113 92 
Total deferred tax assets1,245 1,185 
Valuation allowance(1,078)(904)
Total deferred tax assets, net167 281 
Deferred tax liabilities:
Convertible debt— (91)
Deferred commissions(77)(68)
Other deferred tax liabilities(5)(3)
Operating lease right-of-use assets(31)(37)
Depreciation and amortization(56)(78)
Total deferred tax liabilities(169)(277)
Net deferred tax assets (liabilities)$(2)$4 
Schedule of Unrecognized Tax Benefits Roll Forward A reconciliation of beginning and ending amount of unrecognized tax benefit was as follows:
 Year Ended January 31,
 202320222021
(dollars in millions)
Gross amount of unrecognized tax benefits as of the beginning of the year$37 $22 $16 
Additions based on tax positions related to a prior year1 5 — 
Additions based on tax positions related to current year7 10 7 
Reductions based on tax positions taken in a prior year (2)— (1)
Gross amount of unrecognized tax benefits as of the end of the year$43 $37 $22