Basis of Presentation and Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated balance sheet as of March 31, 2021, the related condensed consolidated statements of income and comprehensive income for the three months ended March 31, 2021 and 2020, the condensed consolidated statements of shareholders' equity for the three months ended March 31, 2021 and 2020 and the condensed consolidated statements of cash flows for the three months ended March 31, 2021 and 2020 of Flowserve Corporation are unaudited. In management’s opinion, all adjustments comprising normal recurring adjustments necessary for fair statement of such condensed consolidated financial statements have been made. Where applicable, prior period information has been updated to conform to current year presentation. The accompanying condensed consolidated financial statements and notes in this Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2021 ("Quarterly Report") are presented as permitted by Regulation S-X and do not contain certain information included in our annual financial statements and notes thereto. Accordingly, the accompanying condensed consolidated financial information should be read in conjunction with the audited consolidated financial statements presented in our Annual Report on Form 10-K for the year ended December 31, 2020 ("2020 Annual Report").
Accounting developments	Accounting Developments Pronouncements Implemented In January 2020, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2020-01, "Investments—Equity Securities (Topic 321), Investments—Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815): Clarifying the Interactions between Topics 321, 323 and 815." The amendments of the ASU addresses accounting for the transition into and out of the equity method and measurement of certain purchased options and forward contracts to acquire investments. The ASU is effective for annual periods beginning after December 15, 2020 and the amendments should be applied retrospectively to all periods presented. The adoption of this ASU did not have an impact on our consolidated financial condition, results of operations or net cash flows. In March of 2020, the FASB issued ASU No. 2020-04, "Reference Rate Reform (Topic 848): Facilitation of The Effects of Reference Rate Reform on Financial Reporting." The ASU provides guidance designed to enable the process for migrating away from reference rates such as the London Interbank Offered Rate ("LIBOR") and others to new reference rates. Further, the amendments of the ASU provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The amendments are effective as of March 12, 2020 through December 31, 2022 and may be applied to contract modifications and hedging relationships from the beginning of an interim period that includes or is subsequent to March 12, 2020. At this time, we do not have hedging relationships that reference LIBOR or another reference rate expected to be discontinued and therefore, have not applied the practical expedients and exceptions as required by the ASU. As referenced in Note 7 of this Quarterly Report, the Company’s Senior Credit Facility agreement includes a transition clause in the event LIBOR is discontinued, as such, we do not expect the transition of LIBOR to have a material impact on our consolidated financial statements. We do not expect the application of these expedients and exceptions to have an impact on our consolidated financial condition and results of operations. In October 2020, the FASB issued ASU No. 2020-10, "Codification Improvements: Amendments to the FASB Accounting Standards Codification." The amendments in this ASU do not change GAAP and, therefore, are not expected to result in a significant change in practice. Rather, the amendments are intended to improve codification guidance and disclosure requirements in Company's financial statements and notes to the financial statements. The amendments are effective for annual periods beginning after December 15, 2020 and the amendments should be applied retrospectively to all periods presented. The adoption of this ASU did not have an impact on our consolidated financial condition, results of operations or net cash flows.
Fair Value	Fair ValueFair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Where available, fair value is based on observable market prices or parameters or derived from such prices or parameters. Where observable prices or inputs are not available, valuation models may be applied. Assets and liabilities recorded at fair value in our condensed consolidated balance sheets are categorized by hierarchical levels based upon the level of judgment associated with the inputs used to measure their fair values. Recurring fair value measurements are limited to investments in derivative instruments. The fair value measurements of our derivative instruments are determined using models that maximize the use of the observable market inputs including interest rate curves and both forward and spot prices for currencies, and are classified as Level II under the fair value hierarchy. The fair values of our derivatives are included in Note 6.