Summary of Significant Accounting Policies (Policies)	9 Months Ended
Summary of Significant Accounting Policies (Policies)	Sep. 30, 2023
Accounting Policies [Abstract]
Basis of Consolidation	Basis of Consolidation The accompanying condensed consolidated financial statements include the accounts of MarketWise, Inc. and its subsidiary, MarketWise, LLC, a variable interest entity (“VIE”) for which MarketWise, Inc. is deemed to be the primary beneficiary. MarketWise, Inc. is a holding company that owns a minority economic interest in MarketWise, LLC but, through its role as the managing member of MarketWise, LLC, controls all of the business and operations of MarketWise, LLC. Therefore, MarketWise, LLC and its subsidiaries are included in the Company’s condensed consolidated financial statements. As of September 30, 2023, MarketWise, Inc. had a 10.6% ownership interest in MarketWise, LLC. The Company determined that MarketWise, LLC is the primary beneficiary of a VIE, and therefore, the assets, liabilities, and results of operations of that VIE are included in the Company’s condensed consolidated financial statements. The condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). All intercompany balances and transactions have been eliminated in consolidation. The accompanying statements of operations include certain expenses incurred by, and charged to us by, a related party for general corporate services. These expenses are based primarily on direct usage when identifiable, direct capital expenditures, or other relevant allocations during the respective periods. We believe the assumptions underlying the accompanying condensed consolidated financial statements, including the assumptions regarding these expenses from this related party, are reasonable. Actual results may differ from these expenses, assumptions and estimates. The amounts recorded in the accompanying condensed consolidated financial statements are not necessarily indicative of the actual amount of such indirect expenses that would have been recorded had we been a separate independent entity.
Unaudited Interim Financial Information	Unaudited Interim Financial Information The accompanying unaudited condensed consolidated financial statements and the related footnote disclosures have been prepared by us in accordance with GAAP for interim financial reporting and as required by Rule 10-01 of Regulation S-X. Accordingly, the unaudited condensed consolidated financial statements may not include all of the information and notes required by GAAP for audited financial statements. The year-end December 31, 2022 consolidated balance sheet data included herein was derived from audited financial statements but does not include all disclosures required by GAAP for complete financial statements. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting of items of a normal and recurring nature, necessary to present fairly our financial position as of September 30, 2023, the results of operations, comprehensive income, stockholders’ deficit, and cash flows for the three and nine months ended September 30, 2023 and 2022. The results of operations for the three and nine months ended September 30, 2023 and 2022 are not necessarily indicative of the results to be expected for the full year. The information contained herein should be read in conjunction with the audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2022 filed with the Securities and Exchange Commission (“SEC”). Management considers events or transactions that occur after the balance sheet date but before the financial statements are issued to provide additional evidence relative to certain estimates or to identify matters that require additional disclosure. Subsequent events have been evaluated through the date of issuance of these condensed financial statements.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions made in the accompanying condensed consolidated financial statements include, but are not limited to, the fair value of common units, derivatives, warrants, valuation of assets acquired and liabilities assumed in business combinations, useful lives of intangible assets with definite lives, benefit period of deferred contract acquisition costs, determination of standalone selling prices, estimated life of lifetime customers, recoverability of goodwill and long-lived assets, valuation allowances on deferred tax assets, the incremental borrowing rates to calculate lease liabilities and right-of-use (“ROU”) assets and certain accruals. We evaluate our estimates and assumptions on an ongoing basis using historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. Actual results could differ from those estimates.
Noncontrolling Interest	Noncontrolling Interest Noncontrolling interest represents the Company’s noncontrolling interest in consolidated subsidiaries which are not attributable, directly or indirectly, to the controlling Class A common stock ownership of the Company.