Document And Entity Information - shares	6 Months Ended
	Dec. 31, 2018	Feb. 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Trading Symbol	HAIN
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 Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		104,118,392