Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Net sales	$ 1,391.5	$ 1,216.1	$ 1,292.9
Cost of sales	878.7	750.6	810.9
Gross profit	512.8	465.5	482.0
Selling, general, and administrative expenses	179.3	149.4	163.1
Research and technical expenses	26.3	22.6	19.7
Restructuring and other (income) charges, net	16.2	18.5	1.8
Acquisition-related costs	0.6	1.8	26.9
Other (income) expense, net	79.9	(4.1)	(4.3)
Interest expense	51.7	47.1	54.6
Interest income	(4.0)	(4.9)	(7.7)
Income (loss) before income taxes	162.8	235.1	227.9
Provision (benefit) for income taxes	44.7	53.7	44.2
Net income (loss)	$ 118.1	$ 181.4	$ 183.7
Per share data
Basic earnings (loss) per common share attributable to Ingevity stockholders (usd per share)	$ 2.97	$ 4.39	$ 4.39
Diluted earnings (loss) per common share attributable to Ingevity stockholders (usd per share)	$ 2.95	$ 4.37	$ 4.35