Stockholders’ Equity and Equity Incentive Plans - Additional Information (Details)	3 Months Ended	6 Months Ended
	Jul. 31, 2025 USD ($) plan $ / shares shares	Jul. 31, 2025 USD ($) plan $ / shares shares	Jan. 31, 2025 $ / shares shares	Nov. 30, 2024 USD ($)	Feb. 29, 2024 USD ($)
Class of Stock [Line Items]
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001	$ 0.001
Remaining authorized repurchase amount	$ 724,700,000	$ 724,700,000
Number of equity incentive plans | plan	2	2
Unrecognized stock-based compensation expenses related to outstanding unvested stock options (in shares)	$ 0	$ 0
RSUs
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses	1,367,500,000	$ 1,367,500,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period (in years)		2 years 8 months 12 days
Awards granted (in shares) | shares		5,161,763
RSUs with Service and Performance Criteria
Class of Stock [Line Items]
Awards granted (in shares) | shares		665,900
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%
ESPP
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses	$ 24,800,000	$ 24,800,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period (in years)		1 year 2 months 12 days
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares 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 program, amount authorized				$ 1,200,000,000	$ 1,500,000,000
Stock repurchased and retired (in shares) | shares	5,950,898	11,512,818
Stock repurchased and retired	$ 463,400,000	$ 881,400,000
Class B Common Stock
Class of Stock [Line Items]
Common stock, shares 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