CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 798.2	$ 793.4	$ 2,405.9	$ 2,485.0
Cost of sales	444.3	443.8	1,327.8	1,374.9
Gross profit	353.9	349.6	1,078.1	1,110.1
Selling, general and administrative expenses	182.9	165.9	560.8	529.9
Restructuring expenses and asset impairments	3.0	4.1	5.4	8.2
Operating income	168.0	179.6	511.9	572.0
Gain on sale of business	0.6	(93.8)	(4.0)	(93.8)
Other expense (income) – net	2.7	(2.1)	0.0	5.6
Interest expense – net	10.3	13.7	27.8	40.1
Income before income taxes	154.4	261.8	488.1	620.1
Provision for income taxes	35.5	52.8	106.7	132.8
Net income	118.9	209.0	381.4	487.3
Net loss attributable to noncontrolling interest	0.2	0.1	0.4	0.2
Net income attributable to IDEX	$ 119.1	$ 209.1	$ 381.8	$ 487.5
Earnings per common share:
Basic earnings per common share attributable to IDEX (in dollars per share)	$ 1.57	$ 2.76	$ 5.03	$ 6.44
Diluted earnings per common share attributable to IDEX (in dollars per share)	$ 1.57	$ 2.75	$ 5.02	$ 6.42
Share data:
Basic weighted average common shares outstanding (in shares)	75.7	75.6	75.7	75.6
Diluted weighted average common shares outstanding (in shares)	75.9	75.9	75.9	75.9