Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net earnings of Flowserve Corporation	$ 26,766	$ (15,820)
Dividends on restricted shares not expected to vest	0	0
Earnings attributable to common and participating shareholders	$ 26,766	$ (15,820)
Weighted average shares:
Common stock (in shares)	130,886,000	130,410,000
Participating securities (in shares)	44,000	0
Denominator for basic earnings per common share (in shares)	130,930,000	130,410,000
Effect of potentially dilutive securities (in shares)	824,000	0
Denominator for diluted earnings per common share (in shares)	131,754,000	130,410,000
Earnings per common share:
Basic (in dollars per share)	$ 0.20	$ (0.12)
Diluted (in dollars per share)	$ 0.20	$ (0.12)
Antidilutive shares (in shares)		641,188