Realignment and Transformation Programs (Details) $ in Thousands		12 Months Ended		60 Months Ended
	Jun. 29, 2018 site	Dec. 31, 2019 USD ($) site	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ (16,252)	$ 24,024	$ 186,997
Non-Restructuring Charges		20,185	28,908	164,713
Transformation Charges		28,039	41,168
Total Realignment and Transformation Charges		31,972	94,100
Total Realignment Charges				351,710
Restructuring Reserve [Roll Forward]
Beginning Balance		11,927	39,230
Charges		(16,252)	24,024	186,997
Ending Balance		6,703	11,927	6,703
FPD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(19,461)	19,258	145,191
Non-Restructuring Charges		13,542	25,129	121,330
Total Realignment and Transformation Charges		(5,919)	44,387
Total Realignment Charges				266,521
Restructuring Reserve [Roll Forward]
Charges		$ (19,461)	19,258	145,191
Divestiture of locations | site	2	2
FCD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 3,209	4,728	41,489
Non-Restructuring Charges		1,960	(1,801)	23,190
Total Realignment and Transformation Charges		5,169	2,927
Total Realignment Charges				64,679
Restructuring Reserve [Roll Forward]
Charges		3,209	4,728	41,489
Subtotal—Reportable Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(16,252)	23,986	186,680
Non-Restructuring Charges		15,502	23,328	144,520
Total Realignment and Transformation Charges		(750)	47,314
Total Realignment Charges				331,200
Restructuring Reserve [Roll Forward]
Charges		(16,252)	23,986	186,680
Eliminations and All Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	38	317
Non-Restructuring Charges		4,683	5,580	20,193
Transformation Charges		28,039	41,168
Total Realignment and Transformation Charges		32,722	46,786
Total Realignment Charges				20,510
Restructuring Reserve [Roll Forward]
Charges		0	38	317
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3,802	22,775	139,869
Non-Restructuring Charges		13,435	19,923	95,645
Total Realignment and Transformation Charges		17,237	42,698
Total Realignment Charges				235,514
Restructuring Reserve [Roll Forward]
Charges		3,802	22,775	139,869
Cost of Sales | FPD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		1,149	18,405	110,191
Non-Restructuring Charges		11,438	21,072	79,922
Total Realignment and Transformation Charges		12,587	39,477
Total Realignment Charges				190,113
Restructuring Reserve [Roll Forward]
Charges		1,149	18,405	110,191
Cost of Sales | FCD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,653	4,370	29,678
Non-Restructuring Charges		1,742	(1,149)	15,460
Total Realignment and Transformation Charges		4,395	3,221
Total Realignment Charges				45,138
Restructuring Reserve [Roll Forward]
Charges		2,653	4,370	29,678
Cost of Sales | Subtotal—Reportable Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3,802	22,775	139,869
Non-Restructuring Charges		13,180	19,923	95,382
Total Realignment and Transformation Charges		16,982	42,698
Total Realignment Charges				235,251
Restructuring Reserve [Roll Forward]
Charges		3,802	22,775	139,869
Cost of Sales | Eliminations and All Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	0
Non-Restructuring Charges		255	0	263
Total Realignment and Transformation Charges		255	0
Total Realignment Charges				263
Restructuring Reserve [Roll Forward]
Charges		0	0	0
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(16,054)	2,249	30,628
Non-Restructuring Charges		6,750	8,985	69,068
Transformation Charges		28,039	41,168
Total Realignment and Transformation Charges		18,735	52,402
Total Realignment Charges				99,696
Restructuring Reserve [Roll Forward]
Charges		(16,054)	2,249	30,628
Selling, General and Administrative Expenses | FPD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(16,610)	1,853	20,300
Non-Restructuring Charges		2,104	4,057	41,408
Total Realignment and Transformation Charges		(14,506)	5,910
Total Realignment Charges				61,708
Restructuring Reserve [Roll Forward]
Charges		(16,610)	1,853	20,300
Selling, General and Administrative Expenses | FCD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		556	358	10,011
Non-Restructuring Charges		218	(652)	7,730
Total Realignment and Transformation Charges		774	(294)
Total Realignment Charges				17,741
Restructuring Reserve [Roll Forward]
Charges		556	358	10,011
Selling, General and Administrative Expenses | Subtotal—Reportable Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(16,054)	2,211	30,311
Non-Restructuring Charges		2,322	3,405	49,138
Total Realignment and Transformation Charges		(13,732)	5,616
Total Realignment Charges				79,449
Restructuring Reserve [Roll Forward]
Charges		(16,054)	2,211	30,311
Selling, General and Administrative Expenses | Eliminations and All Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	38	317
Non-Restructuring Charges		4,428	5,580	19,930
Transformation Charges		28,039	41,168
Total Realignment and Transformation Charges		32,467	46,786
Total Realignment Charges				20,247
Restructuring Reserve [Roll Forward]
Charges		0	38	317
Selling, General and Administrative Expenses | Eliminations and All Other | Flowserve 2.0 Transformation
Restructuring Cost and Reserve [Line Items]
Transformation Charges		28,000	41,200
Income tax expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(4,000)	(1,000)	16,500
Total Realignment and Transformation Charges		(4,000)	(1,000)
Total Realignment Charges				16,500
Restructuring Reserve [Roll Forward]
Charges		(4,000)	(1,000)	16,500
Income tax expense | FPD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(4,000)	(1,000)	14,700
Total Realignment and Transformation Charges		(4,000)	(1,000)
Total Realignment Charges				14,700
Restructuring Reserve [Roll Forward]
Charges		(4,000)	(1,000)	14,700
Income tax expense | FCD
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	1,800
Total Realignment and Transformation Charges		0	0
Total Realignment Charges				1,800
Restructuring Reserve [Roll Forward]
Charges		0	0	1,800
Income tax expense | Subtotal—Reportable Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(4,000)	(1,000)	16,500
Total Realignment and Transformation Charges		(4,000)	(1,000)
Total Realignment Charges				16,500
Restructuring Reserve [Roll Forward]
Charges		(4,000)	(1,000)	16,500
Income tax expense | Eliminations and All Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	0
Total Realignment and Transformation Charges		0	0
Total Realignment Charges				0
Restructuring Reserve [Roll Forward]
Charges		0	0	0
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		4,394	4,850	121,299
Restructuring Reserve [Roll Forward]
Charges		4,394	4,850	121,299
Severance | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,183	2,975	87,343
Restructuring Reserve [Roll Forward]
Charges		2,183	2,975	87,343
Severance | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2,211	1,875	33,956
Restructuring Reserve [Roll Forward]
Charges		2,211	1,875	33,956
Severance | Income tax expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	0
Restructuring Reserve [Roll Forward]
Charges		0	0	0
Contract Termination
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		58	5	1,008
Restructuring Reserve [Roll Forward]
Charges		58	5	1,008
Contract Termination | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		58	5	965
Restructuring Reserve [Roll Forward]
Charges		58	5	965
Contract Termination | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	43
Restructuring Reserve [Roll Forward]
Charges		0	0	43
Contract Termination | Income tax expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	0
Restructuring Reserve [Roll Forward]
Charges		0	0	0
Asset Write-Downs
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(20,211)	9,030	5,813
Restructuring Reserve [Roll Forward]
Charges		(20,211)	9,030	5,813
Asset Write-Downs | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(1,782)	9,018	22,553
Restructuring Reserve [Roll Forward]
Charges		(1,782)	9,018	22,553
Asset Write-Downs | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(18,429)	12	(16,740)
Restructuring Reserve [Roll Forward]
Charges		(18,429)	12	(16,740)
Asset Write-Downs | Income tax expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		0	0	0
Restructuring Reserve [Roll Forward]
Charges		0	0	0
Other
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(493)	10,139	58,877
Restructuring Reserve [Roll Forward]
Charges		(493)	10,139	58,877
Other | Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		3,343	10,777	29,008
Restructuring Reserve [Roll Forward]
Charges		3,343	10,777	29,008
Other | Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		164	362	13,369
Restructuring Reserve [Roll Forward]
Charges		164	362	13,369
Other | Income tax expense
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		(4,000)	(1,000)	16,500
Restructuring Reserve [Roll Forward]
Charges		(4,000)	(1,000)	$ 16,500
Charges Expected to be Settled in Cash
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		7,958	15,996
Restructuring Reserve [Roll Forward]
Charges		7,958	15,996
Restructuring Cash Payment
Restructuring Reserve [Roll Forward]
Cash expenditures		(12,865)	(28,267)
Other Non-Cash Adjustments
Restructuring Reserve [Roll Forward]
Other non-cash adjustments, including currency		$ (317)	$ (15,032)