Equity - Narrative (Details) $ / shares in Units, $ in Thousands			3 Months Ended				9 Months Ended
	Feb. 01, 2023 shares	Mar. 31, 2022 USD ($) founder shares	Oct. 31, 2023 USD ($) shares	Jul. 31, 2023 shares	Apr. 30, 2023 shares	Oct. 31, 2022 USD ($) shares	Oct. 31, 2023 USD ($) shares	Oct. 31, 2022 USD ($) founder $ / shares shares	Feb. 28, 2023 USD ($)	Jan. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award
Stock repurchase program, authorized amount | $									$ 2,000,000
Number of shares repurchased (in shares)			2,607,000				4,012,000
Stock repurchase program, remaining authorized repurchase amount | $			$ 1,400,000				$ 1,400,000
Repurchases of common stock (in shares)							500,000
Additional shares authorized (in shares)					16,165,000
Options granted (shares)			0			0	0
Granted (per share) | $ / shares								$ 101.66
Intrinsic value of shares exercised | $							$ 901,400	$ 875,000
Grant date fair value of vested shares | $							36,400	60,700
Share-based compensation expense | $			$ 298,286			$ 229,163	$ 862,517	$ 610,837
Expected dividend yield							0.00%
Unrecognized share-based compensation expense | $			$ 2,900,000				$ 2,900,000
Unrecognized share-based compensation expense recognition period (term)							2 years 10 months 24 days
Streamlit, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Number of founders | founder		3						3
2020 Equity Incentive Plan:
Share-based Compensation Arrangement by Share-based Payment Award
Additional shares authorized (in shares)	16,200,000
Employee stock purchase rights under the 2020 ESPP
Share-based Compensation Arrangement by Share-based Payment Award
Offering period							6 months
Additional shares authorized (in shares)	3,200,000
Expected dividend yield			0.00%			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
Expected dividend yield								0.00%
Stock options | 2012 Equity Incentive Plan:
Share-based Compensation Arrangement by Share-based Payment Award
Expiration period (years)							10 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Granted (shares)			1,504,000	2,048,000	7,318,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number in shares			19,866,000	20,497,000	20,544,000		19,866,000			15,560,000
RSUs | 2012 Equity Incentive Plan:
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)							4 years
RSUs | 2012 Equity Incentive Plan: | Grant Date
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)							1 year
RSUs | 2020 Equity Incentive Plan:
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)							4 years
RCS | Outside of the Plans
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number in shares			286,000	286,000	286,000		286,000			428,000
RCS | Outside of the Plans | Streamlit, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number in shares			300,000				300,000
Performance-based restricted stock | 2020 Equity Incentive Plan:
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)							4 years
Share-based compensation expense | $			$ 10,500				$ 20,600
Granted (shares)					500,000
Performance-based restricted stock | 2020 Equity Incentive Plan: | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Performance target, percentage							0.00%
Performance-based restricted stock | 2020 Equity Incentive Plan: | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Performance target, percentage					120.00%		120.00%
Performance-based restricted stock | 2020 Equity Incentive Plan: | Grant Date
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)							1 year
Class A Common Stock | RCS | Outside of the Plans | Streamlit, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Granted (shares)		400,000						400,000
Post-combination share-based compensation arrangement by share-based payment award, award vesting period		3 years						3 years
Post-combination share-based compensation arrangement by share-based payment award, equity instruments other than options, granted in period, total fair value | $		$ 93,700						$ 93,700
Post-combination share-based compensation arrangement by share-based payment award, award service period		3 years						3 years