CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues	$ 1,506.6	$ 1,593.9	$ 1,483.2
Cost of products sold	986.2	1,080.7	995.7
Gross profit	520.4	513.2	487.5
Selling, general and administrative	372.8	366.0	377.0
Intangible amortization	11.4	13.2	13.8
Asset impairment charges	11.2	14.4	4.9
Restructuring and other related charges	9.3	7.6	12.9
Operating income	115.7	112.0	78.9
Other income (expense), net	(0.5)	(5.9)	3.9
Interest expense, net	(29.7)	(34.3)	(46.2)
Income from continuing operations before income taxes	85.5	71.8	36.6
Income tax provision	(28.9)	(61.3)	(2.6)
Income from continuing operations	56.6	10.5	34.0
Less: Income (loss) from discontinued operations, net of tax	(149.7)	34.2	12.8
Net income (loss)	(93.1)	44.7	46.8
Less: Net income attributable to noncontrolling interests	2.0	0.7	0.4
Net income (loss) attributable to SPX FLOW, Inc.	(95.1)	44.0	46.4
Income from continuing operations, net of tax	54.9	9.5	33.0
Income (loss) from discontinued operations, net of tax	$ (150.0)	$ 34.5	$ 13.4
Basic and diluted income per share of common stock:
Basic income (loss) per share of common stock from continuing operations (in dollars per share)	$ 1.29	$ 0.23	$ 0.79
Basic income (loss) per share of common stock from discontinued operations (in dollars per share)	(3.53)	0.82	0.32
Basic income (loss) per share of common stock (in dollars per share)	(2.24)	1.04	1.11
Diluted income (loss) per share of common stock from continuing operations (in dollars per share)	1.29	0.22	0.78
Diluted income (loss) per share of common stock from discontinued operations (in dollars per share)	(3.51)	0.81	0.32
Diluted income (loss) per share of common stock (in dollars per share)	$ (2.23)	$ 1.03	$ 1.10
Weighted-average number of common shares outstanding - basic (in shares)	42,465	42,197	41,799
Weighted-average number of common shares outstanding - diluted (in shares)	42,686	42,633	42,183