CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 793.4	$ 824.0	$ 2,485.0	$ 2,371.2
Cost of sales	443.8	442.2	1,374.9	1,290.0
Gross profit	349.6	381.8	1,110.1	1,081.2
Selling, general and administrative expenses	165.9	161.9	529.9	483.7
Restructuring expenses and asset impairments	4.1	17.7	8.2	21.1
Operating income	179.6	202.2	572.0	576.4
Gain on sale of business	(93.8)	(34.8)	(93.8)	(34.8)
Other (income) expense - net	(2.1)	(1.0)	5.6	(3.3)
Interest expense	13.7	9.6	40.1	28.6
Income before income taxes	261.8	228.4	620.1	585.9
Provision for income taxes	52.8	49.7	132.8	129.2
Net income	209.0	178.7	487.3	456.7
Net loss attributable to noncontrolling interest	0.1	0.0	0.2	0.2
Net income attributable to IDEX	$ 209.1	$ 178.7	$ 487.5	$ 456.9
Earnings per common share:
Basic earnings per common share attributable to IDEX (in dollars per share)	$ 2.76	$ 2.37	$ 6.44	$ 6.02
Diluted earnings per common share attributable to IDEX (in dollars per share)	$ 2.75	$ 2.36	$ 6.42	$ 6.00
Share data:
Basic weighted average common shares outstanding (in shares)	75.6	75.4	75.6	75.8
Diluted weighted average common shares outstanding (in shares)	75.9	75.8	75.9	76.1