Acquisitions - Frutarom Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018	Oct. 04, 2018
Business Acquisition [Line Items]
Goodwill	$ 5,381,447	$ 5,378,388
Frutarom
Business Acquisition [Line Items]
Percentage of voting interest acquired			100.00%
Intangible assets acquired	2,668,300	2,690,000
Other non-current assets	412,111	353,710
Redeemable noncontrolling interest	(102,902)	(97,510)
Goodwill	4,273,957	$ 4,243,079
Measurement period adjustments | Frutarom
Business Acquisition [Line Items]
Inventory	19,000
Trade receivables	7,400
Intangible assets acquired	(21,700)
Other non-current assets	58,401
Fair value of equity method investments	10,400
Earn out payable	1,500
Deferred income tax liabilities	14,400
Uncertain tax position liabilities	18,900
Environmental remediation liabilities	5,000
Redeemable noncontrolling interest	(5,392)
Goodwill	$ 30,878