Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 21, 2022	Jun. 30, 2021
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-34581
Entity Registrant Name	KRATON CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-0411521
Entity Address, Address Line One	15710 John F. Kennedy Blvd.
Entity Address, Address Line Two	Suite 300
Entity Address, City or Town	Houston,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77032
City Area Code	281
Local Phone Number	504-4700
Title of 12(b) Security	Common Stock, par value $0.01
Trading Symbol	KRA
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 736,749,273
Entity Common Stock, Shares Outstanding		32,230,354
Documents Incorporated by Reference	We have omitted this section pursuant to General Instruction G(3) of Form 10-K.
Entity Central Index Key	0001321646
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Filer Category	Large Accelerated Filer