Stockholders’ Equity and Equity Incentive Plans - Additional Information (Details)	3 Months Ended	9 Months Ended
	Oct. 31, 2024 USD ($) plan $ / shares shares	Oct. 31, 2024 USD ($) plan $ / shares shares	Nov. 26, 2024 USD ($)	Feb. 29, 2024 USD ($)	Jan. 31, 2024 $ / shares shares
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001			$ 0.001
Remaining authorized amount	$ 760,700,000	$ 760,700,000
Number of equity incentive plans | plan	2	2
Unrecognized stock-based compensation expenses related to outstanding unvested stock options (in shares)	$ 0	$ 0
Subsequent Event
Class of Stock [Line Items]
Remaining authorized amount			$ 2,000,000,000
RSUs
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses	1,584,800,000	$ 1,584,800,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period (in years)		2 years 6 months
Awards granted (in shares) | shares		11,373,214
RSUs with Service and Performance Criteria
Class of Stock [Line Items]
Awards granted (in shares) | shares		1,700,000
Vesting percentage		100.00%
RSUs with Service and Performance Criteria | Minimum
Class of Stock [Line Items]
Vesting percentage		0.00%
RSUs with Service and Performance Criteria | Maximum
Class of Stock [Line Items]
Vesting percentage		100.00%
Employee Stock Purchase Plan
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses	$ 38,600,000	$ 38,600,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period (in years)		1 year 4 months 24 days
Class A Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares) | shares	2,000,000,000	2,000,000,000			2,000,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Stock repurchase plan, authorized amount				$ 1,500,000,000
Stock repurchased and retired during period (in shares) | shares	4,377,296	11,606,691
Stock repurchased and retired during period	$ 301,600,000	$ 739,300,000
Class A Common Stock | Subsequent Event
Class of Stock [Line Items]
Stock repurchase plan, authorized amount			$ 1,200,000,000
Class B Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares) | shares	300,000,000	300,000,000			300,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001