Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 17, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-13179
Entity Registrant Name	FLOWSERVE CORP
Entity Incorporation, State or Country Code	NY
Entity Tax Identification Number	31-0267900
Entity Address, Address Line One	5215 N. O'Connor Boulevard Suite 700,
Entity Address, City or Town	Irving,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75039
City Area Code	972
Local Phone Number	443-6500
Title of 12(b) Security	Common Stock, $1.25 Par Value
Trading Symbol	FLS
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 2,545,362,893
Entity Common Stock, Shares Outstanding		130,401,951
Documents Incorporated by Reference	Certain information contained in the definitive proxy statement for the registrant’s 2022 Annual Meeting of Shareholders scheduled to be held on May 12, 2022 is incorporated by reference into Part III hereof.
Entity Central Index Key	0000030625
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY