Employee Incentive Plans and Stockholders’ Equity - Schedule of Unrecognized Stock-based Compensation Expense (Details) $ in Millions	3 Months Ended
Apr. 30, 2026 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total	$ 874
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 763
Weighted-average remaining period (in years)	2 years 3 months 18 days
RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 14
Weighted-average remaining period (in years)	2 years
Market-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 87
Weighted-average remaining period (in years)	1 year 7 months 6 days
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 10
Weighted-average remaining period (in years)	7 months 6 days

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details