CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 2,764.8	$ 2,351.6	$ 2,494.6
Cost of sales	1,540.3	1,324.2	1,369.6
Gross profit	1,224.5	1,027.4	1,125.0
Selling, general and administrative expenses	578.2	494.9	525.0
Restructuring expenses and asset impairments	9.3	11.8	21.0
Operating income	637.0	520.7	579.0
Other expense - net	16.2	5.6	1.8
Interest expense	41.0	44.8	44.3
Income before income taxes	579.8	470.3	532.9
Provision for income taxes	130.5	92.5	107.4
Net income	449.3	377.8	425.5
Net loss attributable to noncontrolling interest	0.1	0.0	0.0
Net income	$ 449.4	$ 377.8	$ 425.5
Earnings per common share:
Basic earnings per common share attributable to IDEX (in dollar per share)	$ 5.91	$ 4.98	$ 5.62
Diluted earnings per common share attributable to IDEX (in dollar per share)	$ 5.88	$ 4.94	$ 5.56
Share data:
Basic weighted average common shares outstanding (in shares)	76.0	75.7	75.6
Diluted weighted average common shares outstanding (in shares)	76.4	76.4	76.5