Net Income Per Share - Reconciliation of Shares Used in Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net (loss) income available to IFF shareholders	$ (9)	$ 244
Weighted average common shares outstanding (basic) (in shares)	255,000,000	255,000,000
Weighted average shares assuming dilution (diluted) (in shares)	255,000,000	255,000,000
Net income per share - basic (in dollars per share)	$ (0.04)	$ 0.96
Net income per share - diluted (in dollars per share)	$ (0.04)	$ 0.96
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	300,000