Organization Description of Business and Significant Accounting Policies	6 Months Ended
Jun. 30, 2024
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Organization Description of Business and Significant Accounting Policies	NOTE 1 – ORGANIZATION AND DESCRIPTION OF BUSINESS OneStream Software LLC (the Company or OneStream) delivers a unified, artificial intelligence-enabled and extensible software platform - the Digital Finance Cloud - that unifies core financial functions and broader operational data and processes within a single platform. The Company was formed in 2012 as a limited liability company (LLC) in the state of Michigan and converted to a state of Delaware LLC on February 5, 2019. OneStream’s customers are located throughout the world; however, they are primarily located in North America and Europe. OneStream is headquartered in Birmingham, Michigan and has international locations in Australia, Europe and Singapore. OneStream, Inc. was incorporated on October 15, 2021 for the purpose of facilitating an initial public offering (the IPO) and related transactions. As further described in Note, 13, Subsequent Events, OneStream, Inc. completed the Reorganization Transactions on July 23, 2024 and the IPO on July 25, 2024. Subsequent to the Reorganization Transactions and the IPO, OneStream, Inc. is a holding company that operates and controls the business and affairs of the Company as its sole manager.
Parent Company [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Organization Description of Business and Significant Accounting Policies	Note 1 - Organization, Description of business and significant accounting policies OneStream, Inc. (the Corporation) was formed as a Delaware corporation on October 15, 2021. The Corporation was formed for the purposes of completing an initial public offering (the IPO) and related transactions and carrying on the business of OneStream Software LLC. As described in Note 3, the Corporation became the sole manager of OneStream Software LLC at the completion of the Reorganization Transactions on July 23, 2024, and since the IPO it has operated and controlled all of the business and affairs of OneStream Software LLC. Basis of Presentation The balance sheets are presented in accordance with accounting principles generally accepted in the United States of America. Separate statements of operations, comprehensive income, changes in stockholders’ equity, and cash flows have not been presented because, as of June 30, 2024, we had not engaged in any business or other activities except in connection with our formation.

Organization Description of Business and Significant Accounting Policies

6 Months Ended

Jun. 30, 2024

Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]

Organization Description of Business and Significant Accounting Policies

NOTE 1 – ORGANIZATION AND DESCRIPTION OF BUSINESS

OneStream Software LLC (the Company or OneStream) delivers a unified, artificial intelligence-enabled and extensible software platform - the Digital Finance Cloud - that unifies core financial functions and broader operational data and processes within a single platform. The Company was formed in 2012 as a limited liability company (LLC) in the state of Michigan and converted to a state of Delaware LLC on February 5, 2019. OneStream’s customers are located throughout the world; however, they are primarily located in North America and Europe. OneStream is headquartered in Birmingham, Michigan and has international locations in Australia, Europe and Singapore.

OneStream, Inc. was incorporated on October 15, 2021 for the purpose of facilitating an initial public offering (the IPO) and related transactions. As further described in Note, 13, Subsequent Events, OneStream, Inc. completed the Reorganization Transactions on July 23, 2024 and the IPO on July 25, 2024. Subsequent to the Reorganization Transactions and the IPO, OneStream, Inc. is a holding company that operates and controls the business and affairs of the Company as its sole manager.

Parent Company [Member]

Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]

Organization Description of Business and Significant Accounting Policies

Note 1 - Organization, Description of business and significant accounting policies

OneStream, Inc. (the Corporation) was formed as a Delaware corporation on October 15, 2021. The Corporation was formed for the purposes of completing an initial public offering (the IPO) and related transactions and carrying on the business of OneStream Software LLC. As described in Note 3, the Corporation became the sole manager of OneStream Software LLC at the completion of the Reorganization Transactions on July 23, 2024, and since the IPO it has operated and controlled all of the business and affairs of OneStream Software LLC.

Basis of Presentation

The balance sheets are presented in accordance with accounting principles generally accepted in the United States of America. Separate statements of operations, comprehensive income, changes in stockholders’ equity, and cash flows have not been presented because, as of June 30, 2024, we had not engaged in any business or other activities except in connection with our formation.