Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of Astec and its subsidiaries and have been prepared by the Company, pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC"). The Company prepares its financial statements in accordance with accounting principles generally accepted in the U.S. ("U.S. GAAP"). Certain information and footnote disclosures normally included in annual consolidated financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to the SEC rules and regulations governing interim financial statements. However, the Company believes that the disclosures made in the unaudited consolidated financial statements and related notes are adequate to make the information presented not misleading. These consolidated financial statements should be read in conjunction with the Company's audited consolidated financial statements and notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2021. All intercompany balances and transactions between the Company and its affiliates have been eliminated in consolidation. Noncontrolling interest in the Company's consolidated financial statements represents the 7% interest in a consolidated subsidiary which is not owned by the Company. Since the Company controls this subsidiary, the subsidiary's financial statements are consolidated with those of the Company, and the noncontrolling owner's 7% share of the subsidiary's net assets and results of operations is deducted and reported as "Noncontrolling interest" in the Consolidated Balance Sheets and as "Net loss attributable to noncontrolling interest" in the Consolidated Statements of Operations. The Company executed an agreement in February 2022 with the noncontrolling interest holder, which is undergoing a judicial reorganization in Brazil, to acquire their outstanding interest in full for R$10.0M (approximately $2.0 million, subject to the effect of exchange rates). Completion of the transaction is subject to obtaining certain judicial approval in Brazil. The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting periods. Significant items subject to such estimates and assumptions include inventory obsolescence costs, warranty costs, inventory net realizable value, self-insurance loss reserves, share-based compensation and the measurement of income tax assets and liabilities. The Company bases its estimates on historical experience and on various other assumptions that the Company believes to be reasonable under the circumstances. The COVID-19 pandemic and its contributory impacts on the economy have resulted in uncertainties in the Company's business, which may result in actual results differing from those estimates. As a result, the Company's accounting estimates and assumptions may change over time in response to COVID-19 and its contributory impacts. Such changes could result in future impairments of goodwill, intangibles, long-lived assets and investment securities and incremental credit losses on receivables, among other issues. On an ongoing basis, the Company evaluates these assumptions, judgments and estimates. Actual results may differ from these estimates. As discussed in Note 2. Immaterial Error Correction, the Company identified certain immaterial errors during the first quarter of 2022 for which the prior period and all relevant footnotes to the consolidated financial statements in this Form 10-Q have been revised to reflect the corrected balances. In the opinion of management, the consolidated financial statements contain all adjustments necessary for a fair statement of the results of operations and comprehensive income (loss) for the three and nine months ended September 30, 2022 and 2021, the financial position as of September 30, 2022 and December 31, 2021 and the cash flows for the nine months ended September 30, 2022 and 2021, and except as otherwise discussed herein, such adjustments consist only of those of a normal recurring nature. The interim results are not necessarily indicative of results that may be achieved in a full reporting year. All dollar amounts, except share and per share amounts, are in millions of dollars unless otherwise indicated.
Recently Adopted and Recently Issued Accounting Accounting Pronouncements	Recently Adopted Accounting Pronouncements In November 2021, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2021-10, "Government Assistance (Topic 832)", which aims to increase the transparency of government assistance including the disclosure of the types of assistance, an entity’s accounting for the assistance and the effect of the assistance on an entity’s financial statements. The new guidance requires expanded disclosure about transactions with a government that are accounted for by applying a grant or contribution accounting model by analogy. This new standard was effective for the Company on January 1, 2022. Availability of government assistance has typically been limited. The Company did not receive government assistance in 2022. In October 2021, the FASB issued ASU 2021-08, "Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers", which requires entities to recognize and measure contract assets and contract liabilities acquired in a business combination in accordance with ASC 2014-09, Revenue from Contracts with Customers (Topic 606). The update will generally result in an entity recognizing contract assets and contract liabilities at amounts consistent with those recorded by the acquiree immediately before the acquisition date rather than at fair value. The new standard is effective on a prospective basis for fiscal years beginning after December 15, 2022, with early adoption permitted. The Company elected to early adopt this guidance on April 1, 2022. The adoption of this new standard did not have a material impact on its financial position, results of operations, cash flows or disclosures. Recently Issued Accounting Pronouncements Not Yet Adopted In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848)", which provides optional guidance for a limited period of time to ease the potential burden in accounting (or recognizing the effects of) reference rate reform on financial reporting. This was in response to stakeholders raising certain operational challenges likely to arise in accounting for contract modifications and hedge accounting because of reference rate reform. Some of those challenges relate to the significant volume of contracts and other arrangements, such as debt agreements, lease agreements and derivative instruments, which will be modified to replace references to discontinued rates with references to replacement rates. For accounting purposes, such contract modifications are required to be evaluated in determining whether the modifications result in the establishment of new contracts or the continuation of existing contracts. Stakeholders indicated that due to the significant volume of affected contracts and other arrangements, together with a compressed time frame for making contract modifications, the application of existing accounting standards on assessing modifications versus extinguishments could be costly and burdensome. In addition, stakeholders indicated that financial reporting results should reflect the intended continuation of such contracts and arrangements during the period of the market-wide transition to alternative reference rates. The amendments are elective and are effective upon issuance through December 31, 2022. The Company intends to apply this guidance if modifications of its contracts that include LIBOR occur, which is not expected to have a material impact on the Company's consolidated financial statements. Recent accounting guidance not discussed above is not applicable, did not have, or is not expected to have a material impact on the Company.