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Net Income Per Share - Reconciliation of Shares Used in Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Net (Loss) Income      
Net (loss) income attributable to IFF shareholders $ (1,871) $ 270 $ 363
Net (loss) income attributable to IFF shareholders $ (1,868) $ 268 $ 365
Shares      
Average number of shares outstanding - basic (in shares) 255 243 112
Average number of shares outstanding - diluted (in shares) 255 243 114
Net income per share - basic (in dollars per share)      
Net income per share - basic (in dollars per share) $ (7.32) $ 1.11 $ 3.25
Net income per share - diluted (in dollars per share) $ (7.32) $ 1.10 $ 3.21
(Increase) Decrease In Redemption Value, Redeemable Noncontrolling Interest $ 3 $ (2) $ 2
Employee Stock Option And Restricted Stock [Member]      
Shares      
Adjustment for assumed dilution (in shares) 0 0 1
SPC      
Shares      
Adjustment for assumed dilution (in shares) 0 0 1