Equity - Narrative (Details) $ / shares in Units, $ in Thousands						1 Months Ended		12 Months Ended
		Nov. 25, 2024 USD ($) shares	Feb. 01, 2024 shares	Dec. 20, 2023 USD ($) shares	Mar. 31, 2022 USD ($) founder shares	Sep. 30, 2024 USD ($) $ / shares shares	Aug. 31, 2024 USD ($)	Jan. 31, 2025 USD ($) class $ / shares shares	Jan. 31, 2024 USD ($) $ / shares shares	Jan. 31, 2023 USD ($) founder $ / shares shares	Feb. 28, 2023 USD ($)	Jan. 31, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award
Preferred stock, shares authorized (in shares)								200,000,000	200,000,000
Preferred stock, par value (in dollars per share) | $ / shares								$ 0.0001	$ 0.0001
Preferred stock, shares outstanding (in shares)								0	0
Common stock, number of classes of stock | class								2
Stock repurchase program, authorized amount | $											$ 2,000,000
Stock repurchase program, additional authorized amount | $							$ 2,500,000
Number of shares repurchased (in shares)								14,765,000	4,012,000
Aggregate purchase price | $								$ 1,932,164	$ 591,673
Weighted-average price per share (in dollars per share) | $ / shares								$ 130.87	$ 147.49
Shares authorized for repurchase | $								$ 2,000,000
Repurchases of common stock as treasury stock (in shares)									(500,000)
Treasury stock reissued (in shares)								56,000	8,000
Common stock reserved for future issuances (shares)								127,723,000	121,461,000
Weighted-average grant date fair value of options granted (in dollars per share) | $ / shares								$ 79.16		$ 101.66
Options granted (in shares)								1,037,000	0	642,000
Intrinsic value of shares exercised | $								$ 913,900	$ 1,300,000	$ 1,000,000
Grant date fair value of vested shares | $								31,200	42,300	79,100
Stock-based compensation, net of amounts capitalized | $								$ 1,479,314	$ 1,168,015	$ 861,533
Expected dividend yield								0.00%	0.00%	0.00%
Unrecognized share-based compensation expense | $								$ 3,500,000
Unrecognized share-based compensation expense recognition period (in years)								2 years 9 months 18 days
ESPP Rights
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								16,446,000	13,764,000
Shares authorized (in shares)			3,300,000
Stock market discount								85.00%
Offering period (months)								6 months
Expected dividend yield								0.00%	0.00%	0.00%
Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)								4 years
Expiration period (years)								10 years
Award holding period (in years)								1 year
Discount for lack of marketability, percent								7.60%
Expected dividend yield								0.00%		0.00%
Equity-Classified Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Granted (in shares)								17,096,000	12,706,000	10,788,000
Nonvested (in shares)								23,354,000	19,575,000	15,560,000		9,612,000
2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized (in shares)			16,700,000
2020 Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								1,586,000	602,000
2020 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								24,790,000	20,168,000
2020 Plan | Equity-Classified Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)								4 years
Granted (in shares)								800,000	500,000
Stock-based compensation, net of amounts capitalized | $								$ 60,200	$ 30,800
2020 Plan | Equity-Classified Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Performance target, percentage								0.00%
2020 Plan | Equity-Classified Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Performance target, percentage								120.00%
2020 Plan | Equity-Classified Performance Shares | Grant Date
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)								1 year
2020 Plan | Equity-Classified Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)								4 years
2012 Plan | Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								20,067,000	26,767,000
Expiration period (years)								10 years
2012 Plan | RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								0	789,000
2012 Plan | Equity-Classified Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)								4 years
2012 Plan | Equity-Classified Restricted Stock Units (RSUs) | Grant Date
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)								1 year
Outside of the Plans | Restricted Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted (in shares)								445,000	385,000	409,000
Nonvested (in shares)								821,000	671,000	428,000		380,000
Samooha, Inc. | Investing Subsidiary
Share-based Compensation Arrangement by Share-based Payment Award
Business acquisition, equity interest issued or issuable (in shares)				200,000					200,000
Treasury stock retired (in shares)								200,000
Samooha, Inc. | 2020 Plan | Liability-Classified Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)									4 years
Stock-based compensation, net of amounts capitalized | $								$ 10,600	$ 500
Shares available for grant (in shares)								1,700,000
Share based payment arrangement, liabilities | $								$ 11,100	$ 500
Samooha, Inc. | 2020 Plan | Liability-Classified Performance Shares | Grant Date
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)									1 year
Streamlit, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Number of founders | founder					3					3
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Common stock, par value (in dollars per share) | $ / shares								$ 0.0001	$ 0.0001
Common stock, shares outstanding (in shares)	[1]							333,865,000	333,961,000
Class A Common Stock | Shares Repurchased In Privately Negotiated Transactions Entered Into In Connection With Convertible Senior Notes
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares repurchased (in shares)						3,600,000
Aggregate purchase price | $						$ 399,600
Weighted-average price per share (in dollars per share) | $ / shares						$ 112.50
Class A Common Stock | ESPP Rights
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								5,700,000
Class A Common Stock | 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Common stock reserved for future issuances (shares)								34,100,000
Maximum common shares authorized to be outstanding (shares)								78,800,000
Class A Common Stock | Samooha, Inc. | Outside of the Plans | Restricted Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted (in shares)				400,000					400,000
Vesting period (in years)				4 years					4 years
Fair value | $				$ 74,800					$ 74,800
Requisite service period (in years)				4 years					4 years
Nonvested (in shares)								300,000	400,000
Class A Common Stock | Streamlit, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Business acquisition, equity interest issued or issuable (in shares)					1,900,000
Class A Common Stock | Streamlit, Inc. | Outside of the Plans | Restricted Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted (in shares)					400,000					400,000
Vesting period (in years)					3 years					3 years
Fair value | $					$ 93,700					$ 93,700
Requisite service period (in years)					3 years					3 years
Nonvested (in shares)								100,000	300,000
Class A Common Stock | Datavolo, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Business acquisition, equity interest issued or issuable (in shares)		500,000
Class A Common Stock | Datavolo, Inc. | Outside of the Plans | Restricted Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted (in shares)		400,000						400,000
Vesting period (in years)		4 years						4 years
Fair value | $		$ 64,600						$ 64,600
Requisite service period (in years)		4 years						4 years
Nonvested (in shares)								400,000
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Common stock, par value (in dollars per share) | $ / shares								$ 0.0001	$ 0.0001
Common stock, shares outstanding (in shares)								0	0

[1] In connection with a business combination completed on December 20, 2023, the Company issued approximately 0.2 million shares of its Class A common stock to one of its wholly-owned subsidiaries, in exchange for a noncontrolling equity interest in the acquired company that was held by the subsidiary prior to this business combination. These shares were treated as treasury stock for accounting purposes as of January 31, 2024, and were subsequently transferred to the Company and retired during the fiscal year ended January 31, 2025. These shares are not reflected in the Company’s consolidated balance sheets. See Note 7, “Business Combinations,” and Note 12, “Equity,” for further details.