Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net earnings of Flowserve Corporation	$ 38,400	$ 49,785	$ 67,359	$ 109,218
Dividends on restricted shares not expected to vest	0	0	0	0
Earnings attributable to common and participating shareholders	$ 38,400	$ 49,785	$ 67,359	$ 109,218
Weighted average shares:
Common stock (in shares)	130,662,000	130,210,000	130,566,000	130,298,000
Participating securities (in shares)	41,000	32,000	38,000	27,000
Denominator for basic earnings per common share (in shares)	130,703,000	130,242,000	130,604,000	130,325,000
Effect of potentially dilutive securities (in shares)	699,000	547,000	629,000	542,000
Denominator for diluted earnings per common share (in shares)	131,402,000	130,789,000	131,233,000	130,867,000
Earnings per common share:
Basic (in dollars per share)	$ 0.29	$ 0.38	$ 0.52	$ 0.84
Diluted (in dollars per share)	$ 0.29	$ 0.38	$ 0.51	$ 0.83