Stockholders' Equity and Equity Incentive Plans - Additional Information (Details)		1 Months Ended	12 Months Ended
	Nov. 30, 2018 vote $ / shares shares	Apr. 30, 2019 USD ($) period $ / shares shares	Jan. 31, 2025 USD ($) $ / shares shares	Jan. 31, 2024 USD ($) $ / shares shares	Jan. 31, 2023 USD ($) shares	Nov. 30, 2024 USD ($)	Feb. 29, 2024 USD ($)
Class of Stock [Line Items]
Common stock, conversion features, term (in months)	6 months
Initial offering period (in years)	15 years
Common stock, par value (in dollars per share) | $ / shares			$ 0.001	$ 0.001
Remaining authorized repurchase amount | $			$ 1,600,000,000
Shares granted (in shares)			0	0	0
Aggregate intrinsic value, exercised | $			$ 62,063,000	$ 90,000,000.0	$ 121,500,000
Unrecognized stock-based compensation expenses related to outstanding unvested stock options (in shares) | $			$ 0
Number of shares available for future issuance (in shares)			103,407,268	96,713,028
Number of purchase periods | period		4
RSUs
Class of Stock [Line Items]
Unrecognized stock-based compensation expenses | $			$ 1,495,800,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period (in years)			2 years 7 months 6 days
Awards granted (in shares)			13,811,816
Number of shares available for future issuance (in shares)			23,870,513	26,040,557
Restricted Stock Units (RSUs) with Service and Performance Criteria
Class of Stock [Line Items]
Awards granted (in shares)			1,700,000
Vesting percentage			100.00%
Restricted Stock Units (RSUs) with Service and Performance Criteria | Minimum
Class of Stock [Line Items]
Vesting percentage			0.00%
Restricted Stock Units (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 | $			$ 36,200,000
Unrecognized stock-based compensation excepted to be recognized over a weighted-average period (in years)			1 year 7 months 6 days
Number of shares available for future issuance (in shares)			2,311,567	2,086,604
Maximum number of shares per employee (in shares)		3,000
Consecutive offering period (in months)		27 months
2019 Plan
Class of Stock [Line Items]
Vesting period of awards (in years)		4 years
Maximum term (in years)		10 years
Shares reserved for issuance (as a percent)		5.00%
2019 Employee Stock Purchase Plan | ESPP
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)			18,807,595	14,712,385
Percent of outstanding stock, maximum (as a percent)		1.00%
Number of additional shares allowable under the plan (in shares)		7,500,000
Class A
Class of Stock [Line Items]
Common stock number of votes per share | vote	1
Common stock, conversion basis (in shares)	1
Common stock, shares authorized (in shares)	320,000,000	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 prepurchased and retired (in shares)			15,888,316
Stock repurchased and retired | $			$ 1,100,000,000
Class A | ESPP
Class of Stock [Line Items]
Percentage of purchase price of common stock to fair market value of common stock on offering or purchase date (as a percent)		85.00%
ESPP excess rate purchase right, value | $		$ 25,000
Shares issued of common stock (in shares)			1,066,977	921,892	678,279
Class A | 2019 Plan
Class of Stock [Line Items]
Number of shares authorized (in shares)		58,300,889
Number of additional shares authorized under the plan (in shares)		34,000,000
Class A | 2011 Plan
Class of Stock [Line Items]
Other shares authorized (in shares)		24,300,889
Class A | 2019 Employee Stock Purchase Plan | ESPP
Class of Stock [Line Items]
Number of shares available for future issuance (in shares)		9,000,000
Class B
Class of Stock [Line Items]
Common stock number of votes per share | vote	10
Common stock, conversion basis (in shares)	1
Common stock, shares authorized (in shares)	300,000,000	300,000,000	300,000,000	300,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001