Document And Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2019	Aug. 22, 2019	Dec. 31, 2018
Cover page.
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	HAIN CELESTIAL GROUP INC.
Entity Central Index Key	0000910406
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		104,218,650
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,458,202,287