CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 3,273.9	$ 3,181.9	$ 2,764.8
Cost of sales	1,827.0	1,755.0	1,540.3
Gross profit	1,446.9	1,426.9	1,224.5
Selling, general and administrative expenses	703.5	652.7	578.2
Restructuring expenses and asset impairments	10.9	22.8	9.3
Operating income	732.5	751.4	637.0
Gain on sale of businesses - net	(84.7)	(34.8)	0.0
Other expense (income) - net	5.2	(3.9)	16.2
Interest expense	51.7	40.7	41.0
Income before income taxes	760.3	749.4	579.8
Provision for income taxes	164.7	162.7	130.5
Net income	595.6	586.7	449.3
Net loss attributable to noncontrolling interest	0.5	0.2	0.1
Net income	$ 596.1	$ 586.9	$ 449.4
Earnings per common share:
Basic earnings per common share attributable to IDEX (in dollar per share)	$ 7.87	$ 7.74	$ 5.91
Diluted earnings per common share attributable to IDEX (in dollar per share)	$ 7.85	$ 7.71	$ 5.88
Share data:
Basic weighted average common shares outstanding (in shares)	75.6	75.7	76.0
Diluted weighted average common shares outstanding (in shares)	75.9	76.0	76.4