Business Combinations and Asset Acquisition (Details) $ in Millions				1 Months Ended	12 Months Ended
	Dec. 01, 2017 USD ($)	Apr. 04, 2017	Jul. 31, 2015 USD ($) shares	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2020 country	Nov. 07, 2017 country
Class of Warrant or Right [Line Items]
Number of operating countries | country							50
Tax receivables agreement (TRA)
Class of Warrant or Right [Line Items]
Settlement of preexisting relationship, amount				$ 16.0
Settlement with related party, liability				27.9
Settlement with related party, deferred income taxes				$ 5.9
Tax receivables agreement (TRA) | Dow
Class of Warrant or Right [Line Items]
Rate of tax receivable agreement		50.00%
AgroFresh Inc.
Class of Warrant or Right [Line Items]
Cash consideration			$ 635.0
Tecnidex Fruit Protection, S.A.U.
Class of Warrant or Right [Line Items]
Cash consideration	$ 20.0					$ 2.3
Purchase price	$ 22.3
Percentage of voting interests acquired	75.00%
Tecnidex Fruit Protection, S.A.U. | Previously Reported
Class of Warrant or Right [Line Items]
Purchase price	$ 25.0
Common Stock | AgroFresh Inc.
Class of Warrant or Right [Line Items]
Number of shares issued as consideration (in shares) | shares			17,500,000
Level 3 | Tecnidex Fruit Protection, S.A.U.
Class of Warrant or Right [Line Items]
Contingent consideration	$ 0.7
Adjustment to purchase price allocation					$ 0.4
Tecnidex Fruit Protection, S.A.U. | Tecnidex Fruit Protection, S.A.U.
Class of Warrant or Right [Line Items]
Number of operating countries | country								18