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Equity - Narrative (Details) $ / shares in Units, $ in Thousands			3 Months Ended
	Feb. 01, 2023 shares	Mar. 31, 2022 USD ($) founder shares	Apr. 30, 2023 USD ($) shares	Apr. 30, 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
Stock repurchase program, remaining authorized repurchase amount \| $			$ 1,800,000
Number of shares repurchased (in shares)			500,000
Additional shares authorized (in shares)			16,165,000
Options granted (shares)			0
Granted (per share) \| $ / shares				$ 101.66
Intrinsic value of shares exercised \| $			$ 321,700	$ 509,900
Grant date fair value of vested shares \| $			16,500	19,900
Share-based compensation expense \| $			$ 264,509	$ 172,493
Expected dividend yield			0.00%
Unrecognized share-based compensation expense \| $			$ 3,100,000
Unrecognized share-based compensation expense recognition period (term)			3 years 1 month 6 days
Treasury Stock
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares repurchased (in shares)			500,000
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%
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
Vesting period (years)			4 years
Granted (shares)			7,318,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number			20,544,000			15,560,000
RSUs \| Grant Date
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)			1 year
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			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			300,000
Performance-based restricted stock
Share-based Compensation Arrangement by Share-based Payment Award
Granted (shares)			500,000
Performance-based restricted stock \| 2020 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period (years)			4 years
Share-based compensation expense \| $			$ 3,900
Performance-based restricted stock \| 2020 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Performance target, percentage			0.00%
Performance-based restricted stock \| 2020 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Performance target, percentage			120.00%
Performance-based restricted stock \| 2020 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