Segment Information - Reportable Segment Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 5,140,084	$ 3,977,539	$ 3,398,719
Segment assets	13,287,411	12,889,395
Operating profit	665,270	583,882	552,630
Legal Charges/Credits, net	0	0	56,000
Restructuring and Other Charges, net	(29,765)	(5,079)	(19,711)
Gain on Sale of Assets	(2,367)	1,177	184
Interest expense	(138,221)	(132,558)	(65,363)
Loss on extinguishment of debt	0	(38,810)	0
Other income (expense), net	30,403	35,243	49,778
Income before taxes	557,452	447,757	537,045
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Operational Improvement Initiatives	(2,267)	(2,169)	(1,802)
Acquisition Related Costs	0	1,289	(20,389)
Integration Related Costs	(55,160)	(7,188)	(4,179)
Legal Charges/Credits, net	0	0	(1,000)
Tax assessment	0	0	(5,331)
Restructuring and Other Charges, net	(29,765)	(4,086)	(19,711)
Gain on Sale of Assets	(2,367)	1,177	184
FDA Mandated Product Recall	11,314	0	0
UK Pension Settlement Charges	(5,940)	(89,632)	$ 0
Frutarom Industries Ltd. [Member]
Segment Reporting Information [Line Items]
Restructuring and Other Charges, net	$ (10,042)	$ 0
Operating Segments [Member]
Segment Reporting Information [Line Items]
Profit margin	12.90%	14.70%	16.30%
Operating Segments [Member] | Flavors [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,731,919	$ 1,737,349	$ 1,632,166
Segment assets	2,222,154	2,024,573
Operating profit	$ 382,590	$ 395,190	$ 360,483
Profit margin	22.10%	22.70%	22.10%
Operating Segments [Member] | Fragrances [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,922,717	$ 1,880,630	$ 1,766,553
Segment assets	2,549,113	2,340,131
Operating profit	$ 333,522	$ 329,548	$ 318,954
Profit margin	17.30%	17.50%	18.10%
Operating Segments [Member] | Frutarom Industries Ltd. [Member]
Segment Reporting Information [Line Items]
Net sales	$ 1,485,448	$ 359,560
Segment assets	8,306,003	7,961,538
Operating profit	$ 126,804	$ 27,358
Profit margin	8.50%	7.60%
Global [Member]
Segment Reporting Information [Line Items]
Segment assets	$ 210,141	$ 563,153
Operating profit	(49,836)	(74,730)	$ (60,810)
Nutrition & Biosciences, Inc [Member]
Segment Reporting Information [Line Items]
Business Acquisition, Transaction Costs	75,000
Nutrition & Biosciences, Inc [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Acquisition Related Costs	(20,747)	0	0
Frutarom Industries Ltd. [Member]
Segment Reporting Information [Line Items]
Amortization		23,500
Business Acquisition, Transaction Costs		66,000
Acquisition-related Costs [Member]
Segment Reporting Information [Line Items]
Operating profit	(250)	7,125	(11,000)
UNITED KINGDOM | Corporate and Other [Member]
Segment Reporting Information [Line Items]
FDA Mandated Product Recall	$ 0	$ 0	$ (2,769)