COVER - USD ($)	12 Months Ended
	Jun. 30, 2020	Aug. 18, 2020	Dec. 31, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jun. 30, 2020
Document Transition Report	false
Entity File Number	0-22818
Entity Registrant Name	THE HAIN CELESTIAL GROUP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	22-3240619
Entity Address, Address Line One	1111 Marcus Avenue
Entity Address, City or Town	Lake Success
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	11042
City Area Code	516
Local Phone Number	587-5000
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	HAIN
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float			$ 2,156,022,599
Entity Common Stock, Shares Outstanding		101,886,315
Documents Incorporated by Reference	Portions of The Hain Celestial Group, Inc. Definitive Proxy Statement for the 2020 Annual Meeting of Stockholders are incorporated by reference into Part III of this Annual Report on Form 10-K.
Amendment Flag	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Central Index Key	0000910406
Current Fiscal Year End Date	--06-30