Basis of Presentation and Recent Developments	3 Months Ended
Basis of Presentation and Recent Developments	Mar. 31, 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. The Company continues to monitor the worldwide public health threat and government actions to combat COVID-19 and the impact such developments may have on the overall economy, our clients and operations. The impact of the pandemic and the corresponding actions are reflected in our judgments, assumptions and estimates in the preparation of the financial statements. The judgments, assumptions and estimates will be updated and could result in different results in the future depending on the continued impact of the COVID-19 pandemic. In addition, while not material, the Company continues to monitor the war and other geopolitical tensions between Russia and Ukraine and will continue to assess any potential impacts that this conflict may have on the economy, our clients, and our operations. 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 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 April 19, 2022, the Company acquired Brand New Galaxy (“BNG”), a leading provider of scaled commerce and marketplace solutions, for approximately $20,000, subject to post-closing adjustments, as well as contingent consideration up to a maximum value of $50,000. The contingent consideration is due upon meeting certain future earnings targets through 2024, with approximately 67% payable in cash and 33% payable in Class A Common Stock. BNG will be included within the Media Network segment. The purchase price allocation has not yet been completed. The Company will provide the purchase price allocation and pro forma operating results of the combined company in its Form 10-Q for the period of June 30, 2022.
Reclassifications	We have revised the presentation of Current Liabilities to separately present Accrued media 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.