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Common Stock, Voting Rights, Votes Per Share

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Number of Founders

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Post-combination Share-based Compensation Arrangement by Share-based Payment Award, Award Service Period

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Post-combination Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

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Post-combination Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Total Fair Value

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Share-based Compensation Arrangement By Share-based Payment Award, Stock Plan Offering Period

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of additional shares authorized for issuance under share-based payment arrangement.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Equity - Narrative (Details) $ / shares in Units, $ in Millions						3 Months Ended			6 Months Ended
	Mar. 31, 2022 USD ($) co-founder shares	Feb. 01, 2022 shares	Mar. 03, 2021 shares	Mar. 01, 2021 vote $ / shares shares	Feb. 28, 2021 vote	Jul. 31, 2022 USD ($) $ / shares shares	Apr. 30, 2022 shares	Jul. 31, 2021 shares	Jul. 31, 2022 USD ($) co-founder $ / shares shares	Jul. 31, 2021 USD ($) shares	Jan. 31, 2022 $ / shares shares	Sep. 30, 2020 class $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award
Preferred stock, shares authorized (in shares)						200,000,000			200,000,000		200,000,000	200,000,000
Preferred stock, par value (in dollars per share) \| $ / shares						$ 0.0001			$ 0.0001		$ 0.0001	$ 0.0001
Common stock, number of classes of stock \| class												2
Conversion, percent threshold					10.00%
Shares authorized (in shares)							15,619,000
Granted (per share) \| $ / shares									$ 101.66
Options granted (shares)						0	642,000	0		0
Intrinsic value of shares exercised \| $									$ 704.6	$ 2,600.0
Grant date fair value of vested shares \| $									$ 41.3	$ 44.1
Expected dividend yield									0.00%
Unrecognized share-based compensation expense \| $						$ 2,400.0			$ 2,400.0
Unrecognized share-based compensation expense recognition period (term)									3 years 2 months 12 days
Streamlit, Inc.
Share-based Compensation Arrangement by Share-based Payment Award
Number of founders \| co-founder	3								3
2020 Equity Incentive Plan:
Share-based Compensation Arrangement by Share-based Payment Award
Shares authorized (in shares)		15,600,000
Employee stock purchase rights under the 2020 ESPP
Share-based Compensation Arrangement by Share-based Payment Award
Offering period									6 months
Shares authorized (in shares)		3,100,000
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
Vesting period (years)									4 years
Granted (shares)						1,374,000	5,763,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number						14,337,000	14,200,000		14,337,000		9,612,000
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
Granted (shares)							409,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, nonvested, number						609,000	699,000		609,000		380,000
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						400,000			400,000
Class A Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Common stock, shares authorized (in shares)						2,500,000,000			2,500,000,000		2,500,000,000	2,500,000,000
Common stock, par value (in dollars per share) \| $ / shares				$ 0.0001		$ 0.0001			$ 0.0001		$ 0.0001
Common stock, voting rights, votes per share \| vote				1
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 \| $	$ 93.7								$ 93.7
Post-combination share-based compensation arrangement by share-based payment award, award service period	3 years								3 years
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Common stock, shares authorized (in shares)						185,461,000			185,461,000		185,461,000	355,000,000
Shares converted (in shares)			169,500,000	169,500,000
Common stock, par value (in dollars per share) \| $ / shares				$ 0.0001		$ 0.0001			$ 0.0001		$ 0.0001
Common stock, voting rights, votes per share \| vote					10