CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement [Abstract]
Net sales	$ 824.0	$ 712.0	$ 2,371.2	$ 2,050.0
Cost of sales	442.2	400.4	1,290.0	1,139.7
Gross profit	381.8	311.6	1,081.2	910.3
Selling, general and administrative expenses	161.9	147.2	483.7	426.7
Restructuring expenses and asset impairments	17.7	3.2	21.1	8.6
Operating income	202.2	161.2	576.4	475.0
Gain on sale of business	(34.8)	0.0	(34.8)	0.0
Other (income) expense - net	(1.0)	0.6	(3.3)	17.0
Interest expense	9.6	9.5	28.6	31.4
Income before income taxes	228.4	151.1	585.9	426.6
Provision for income taxes	49.7	35.4	129.2	96.0
Net income	178.7	115.7	456.7	330.6
Net loss attributable to noncontrolling interest	0.0	0.0	0.2	0.0
Net income attributable to IDEX	$ 178.7	$ 115.7	$ 456.9	$ 330.6
Earnings per common share:
Basic earnings per common share attributable to IDEX (in dollars per share)	$ 2.37	$ 1.52	$ 6.02	$ 4.35
Diluted earnings per common share attributable to IDEX (in dollars per share)	$ 2.36	$ 1.51	$ 6.00	$ 4.33
Share data:
Basic weighted average common shares outstanding (in shares)	75.4	76.0	75.8	76.0
Diluted weighted average common shares outstanding (in shares)	75.8	76.5	76.1	76.4