Basis of Presentation and Recent Developments	6 Months Ended
Basis of Presentation and Recent Developments	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Recent Developments	1. Business and Basis of Presentation Stagwell Inc. (the “Company” or “Stagwell”), incorporated under the laws of Delaware, conducts its business through its networks and their Brands (“Brands”), which provide marketing and business solutions that realize the potential of combining data and creativity. Stagwell’s strategy is to build, grow and acquire market-leading businesses that deliver the modern suite of services that marketers need to thrive in a rapidly evolving business environment. The accompanying condensed consolidated financial statements include the accounts of Stagwell and its subsidiaries. Stagwell has prepared the unaudited condensed consolidated interim financial statements included herein in accordance with accounting principles generally accepted in the United States (“GAAP”) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”) for reporting interim financial information on Form 10-Q. Accordingly, the financial statements have been condensed and do not include certain information and disclosures pursuant to these rules. The preparation of financial statements in conformity with GAAP requires us to make judgments, assumptions and estimates about current and future results of operations and cash flows that affect the amounts reported and disclosed. Actual results could differ from these estimates and assumptions. The consolidated results for interim periods are not necessarily indicative of results for the full year and should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (“2021 Form 10-K”). On December 21, 2020, MDC Partners Inc. (“MDC”) and Stagwell Media LP (“Stagwell Media”) announced that they had entered into the Transaction Agreement, providing for the combination of MDC with the operating businesses and subsidiaries of Stagwell Media (the “Stagwell Subject Entities”). The Stagwell Subject Entities comprised Stagwell Marketing Group LLC (“Stagwell Marketing” or “SMG”) and its direct and indirect subsidiaries. On August 2, 2021, we completed the previously announced combination of MDC and the operating businesses and subsidiaries of Stagwell Media and a series related transactions (such combination and transactions, the “Transactions”). The Transactions were treated as a reverse acquisition for financial reporting purposes, with MDC treated as the legal acquirer and Stagwell Marketing treated as the accounting acquirer. The results of MDC are included within the Unaudited Condensed Consolidated Statements of Operations for the period beginning on the date of the acquisition through the end of the respective period presented and the results of SMG are included for the entire period presented. See Note 3 of the Notes included herein for information in connection with the acquisition of MDC. We continue to monitor the impact on our operations from worldwide events such as the COVID-19 pandemic and evolving strains of COVID-19, as well as the military conflict between Russia and Ukraine, which we do not expect to have a material adverse effect on our operations. Our judgments, assumptions and estimates about the potential effects of such events are reflected in the financial statements. The use of different judgements, assumptions or estimates could have a material impact on our condensed consolidated financial statements. The accompanying financial statements reflect all adjustments, consisting of normally recurring accruals, which in the opinion of management are necessary for a fair presentation, in all material respects, of the information contained therein. Intercompany balances and transactions have been eliminated in consolidation. Certain reclassifications have been made to the prior year financial information to conform to the current year presentation. We have revised the presentation of Current Liabilities to separately present Accrued media, which was previously included in Accruals and other liabilities, of $237,794 as of December 31, 2021. As a result, the accompanying Condensed Consolidated Balance Sheet has been revised to correct this immaterial classification error by decreasing the previously reported amount for Accruals and other liabilities as of December 31, 2021 by the $237,794 of Accrued media. This revision had no effect on our previously reported Total Current Liabilities, or on any other previously reported amounts in our consolidated financial statements for the year ended December 31, 2021. Recent Developments On July 12, 2022, the Company acquired PEP Group Holdings B.V. (“PEP Group”), an omnichannel content creation and adaption production company for approximately $766, subject to post-closing adjustments, as well as contingent consideration up to a maximum value of $2,679. The contingent consideration is based on meeting certain future earnings targets through 2025. Stagwell expects the acquisition of PEP Group will bolster its media and content production capabilities across its global network. On July 15, 2022, the Company acquired Apollo Program II Inc. (“Apollo”), a real-time artificial intelligence-powered software-as-a-service platform, for approximately $2,300, subject to post-closing adjustments, as well as fixed deferred payments of $1,000 and $1,500 on or prior to July 1, 2023 and July 1, 2024, respectively. Stagwell expects Apollo will be integrated with Stagwell’s data and insights unification tool, Consumer Understand and Engagement.
Reclassifications	We have revised the presentation of Current Liabilities to separately present Accrued media, which was previously included in Accruals and other liabilities, of $237,794 as of December 31, 2021. As a result, the accompanying Condensed Consolidated Balance Sheet has been revised to correct this immaterial classification error by decreasing the previously reported amount for Accruals and other liabilities as of December 31, 2021 by the $237,794 of Accrued media. This revision had no effect on our previously reported Total Current Liabilities, or on any other previously reported amounts in our consolidated financial statements for the year ended December 31, 2021.