Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended																12 Months Ended
	Dec. 31, 2021		Sep. 30, 2021		Jun. 30, 2021		Mar. 31, 2021		Dec. 31, 2020		Sep. 30, 2020		Jun. 30, 2020		Mar. 31, 2020		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Quarterly Financial Data [Abstract]
Sales	$ 919,500		$ 866,100		$ 898,200		$ 857,300		$ 985,300		$ 924,300		$ 925,000		$ 893,500		$ 3,541,060	$ 3,728,134	$ 3,939,697
Gross profit	267,100		253,500		278,200		250,900		295,400		285,200		269,700		266,500		1,049,725	1,116,769	1,289,343
Earnings before income taxes	20,800		41,400		50,500		21,000		60,383		78,000		12,800		51,200		133,588	202,292	322,433
Net earnings attributable to Flowserve Corporation	$ 16,700		$ 49,800		$ 45,400		$ 14,100		$ 56,051		$ 56,100		$ 6,100		$ 12,100		$ 125,949	$ 130,420	$ 238,828
Earnings per share:
Basic (in dollars per share)	$ 0.13	[1]	$ 0.38	[1]	$ 0.35	[1]	$ 0.11	[1]	$ 0.43	[1]	$ 0.43	[1]	$ 0.05	[1]	$ 0.09	[1]	$ 0.97	$ 1.00	$ 1.82
Diluted (in dollars per share)	$ 0.13	[1]	$ 0.38	[1]	$ 0.35	[1]	$ 0.11	[1]	$ 0.43	[1]	$ 0.43	[1]	$ 0.05	[1]	$ 0.09	[1]	$ 0.96	$ 1.00	$ 1.81

[1] Earnings per share is computed independently for each of the quarters presented. The sum of the quarters may not equal the total year amount due to the impact of changes in weighted average quarterly shares outstanding or rounding.