CONSOLIDATED STATEMENT OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 11,479	$ 12,440	$ 11,656
Cost of goods sold	7,798	8,289	7,921
Gross profit	3,681	4,151	3,735
Research and development expenses	636	603	629
Selling and administrative expenses	1,787	1,768	1,749
Restructuring and other charges	68	12	41
Amortization of acquisition-related intangibles	680	727	732
Impairment of goodwill	2,623	2,250	0
Impairment of long-lived assets	0	120	0
Gains on sale of assets	(3)	(3)	(1)
Operating (loss) profit	(2,110)	(1,326)	585
Interest expense	380	336	289
Other expense (income), net	28	(37)	(58)
(Loss) income before taxes	(2,518)	(1,625)	354
Provision for income taxes	45	239	75
Net (loss) income	(2,563)	(1,864)	279
Net income attributable to non-controlling interest	4	7	9
Net income available to IFF common shareholders	(2,567)	(1,871)	270
Other comprehensive income (loss), after tax:
Foreign currency translation adjustments	414	(933)	(848)
Gains on derivatives qualifying as hedges	0	0	8
Pension and postretirement liability adjustment	(112)	158	115
Other comprehensive income (loss)	302	(775)	(725)
Comprehensive loss	(2,261)	(2,639)	(446)
Comprehensive loss attributable to IFF shareholders	$ (2,265)	$ (2,646)	$ (455)
Net income per share - basic (in dollars per share)	$ (10.05)	$ (7.32)	$ 1.11
Net income per share - diluted (in dollars per share)	$ (10.05)	$ (7.32)	$ 1.10
Average number of shares outstanding - basic (in shares)	255	255	243
Average number of shares outstanding - diluted (in shares)	255	255	243