Basis of Presentation and Accounting Policies	6 Months Ended
Basis of Presentation and Accounting Policies	Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies	Basis of Presentation and Accounting Policies Basis of Presentation The accompanying condensed consolidated balance sheet as of June 30, 2021, the related condensed consolidated statements of income and comprehensive income (loss) for the three and six months ended June 30, 2021 and 2020, the condensed consolidated statements of shareholders' equity for the three and six months ended June 30, 2021 and 2020 and the condensed consolidated statements of cash flows for the six months ended June 30, 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 June 30, 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"). Revision to Previously Reported Financial Information - During the first quarter of 2021, as previously disclosed, we identified an accounting error involving foreign currency transactions beginning with the first quarter of 2020 through the year ended December 31, 2020. These adjustments increased retirement obligations and other liabilities by $1.5 million, retained earnings by $14.0 million and accumulated other comprehensive loss by $15.5 million as of December 31, 2020. In addition, as previously disclosed, during the third quarter of 2020, we identified accounting errors related to the recognition of a liability for unasserted asbestos claims. The adjustments primarily related to an incurred but not reported ("IBNR") liability associated with unasserted asbestos claims, but also included adjustments related to the associated receivables for expected insurance proceeds for asbestos settlement and defense costs from insurance coverage and the recognition as an expense the related legal fees that were previously estimated to be recoverable from insurance carriers for which coverage is not currently sufficient following the recognition of the IBNR for periods beginning with the year ended December 31, 2014 through the second quarter of 2020 and to correct certain other previously identified immaterial errors. We have assessed the above described errors, individually and in the aggregate, and concluded they were not material to the period ended June 30, 2020 or any previous period. The June 30, 2020, balances, as presented herein, have been revised. Additionally, the remaining periods in 2020 will be revised the next time such financial statements are filed as applicable. Refer to Note 2 for a detailed discussion related to the impact of the revision as of and for the three and six months ended June 30, 2020 and the impact to future periods in 2020 which will be revised in future filings. Coronavirus Pandemic ("COVID-19") and Oil and Gas Market - During the first six months of 2021, we continue to be challenged by macroeconomics and global economic impacts based on the disruption and uncertainties caused by COVID-19. As a result of the COVID-19 pandemic’s effect on oil prices, many of our large customers reduced capital expenditures and budgets in 2020. To date, customer spending has yet to return to pre-pandemic levels. The preparation of our condensed consolidated financial statements requires us to make estimates, judgments and assumptions that may affect the reported amounts of assets, liabilities, equity, revenues and expenses and related disclosure of contingent assets and liabilities. We evaluate our estimates, judgments and methodologies on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe are reasonable, the results of which form the basis for making judgments about the carrying values of assets, liabilities and equity and the amount of revenues and expenses. The full extent to which the COVID-19 pandemic directly or indirectly impacts our business, results of operations and financial condition, including sales, expenses, our allowance for expected credit losses, stock based compensation, the carrying value of our goodwill and other long-lived assets, financial assets, and valuation allowances for tax assets, will depend on future developments that are highly uncertain, including as a result of new information that may emerge concerning COVID-19 and the actions taken to contain it or treat it, as well as the economic impact on local, regional, national and international customers, suppliers and markets. We have made estimates of the impact of COVID-19 within our financial statements and there may be changes to those estimates in the near to mid-term as new information becomes available. Actual results may differ from these estimates. 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.