CONSOLIDATED STATEMENT OF INCOME (LOSS) AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net sales	$ 2,820	$ 3,063	$ 8,776	$ 9,596
Cost of goods sold	1,896	2,062	5,955	6,314
Gross profit	924	1,001	2,821	3,282
Research and development expenses	157	145	479	460
Selling and administrative expenses	444	413	1,343	1,328
Amortization of acquisition-related intangibles	170	182	513	552
Impairment of goodwill	0	2,250	0	2,250
Impairment of long-lived assets	0	0	0	120
Restructuring and other charges	2	(4)	61	5
Gain (Loss) on Disposition of Assets	(1)	0	1	2
Operating profit (loss)	150	(1,985)	426	(1,431)
Interest expense	110	83	337	232
Other income, net	(19)	(33)	(34)	(43)
Income (loss) before taxes	59	(2,035)	123	(1,620)
Provision for income taxes	32	160	77	220
Net income (loss)	27	(2,195)	46	(1,840)
Net income attributable to non-controlling interests	2	2	3	6
Net income (loss) attributable to IFF shareholders	$ 25	$ (2,197)	$ 43	$ (1,846)
Net income per share - basic (in dollars per share)	$ 0.10	$ (8.60)	$ 0.16	$ (7.22)
Net income per share - diluted (in dollars per share)	$ 0.10	$ (8.60)	$ 0.16	$ (7.22)
Average number of shares outstanding - basic (in shares)	255	255	255	255
Average number of shares outstanding - diluted (in shares)	256	255	255	255
Other comprehensive loss, after tax:
Foreign currency translation adjustments	$ (476)	$ (982)	$ (132)	$ (1,770)
Pension and postretirement liability adjustment	(3)	5	(6)	6
Net current period other comprehensive income (loss)	(479)	(977)	(138)	(1,764)
Comprehensive loss	(452)	(3,172)	(92)	(3,604)
Comprehensive loss attributable to IFF shareholders	$ (454)	$ (3,174)	$ (95)	$ (3,610)