Document and Entity Information Document - shares	6 Months Ended
	Dec. 31, 2020	Jan. 28, 2021
Entity Information [Line Items]
Document Type	10-Q
Entity File Number	0-3279
Entity Registrant Name	KIMBALL INTERNATIONAL, INC.
Entity Incorporation, State or Country Code	IN
Entity Tax Identification Number	35-0514506
City Area Code	812
Entity Address, Address Line One	1600 Royal Street
Entity Address, City or Town	Jasper
Entity Address, State or Province	IN
Entity Address, Postal Zip Code	47546-2256
Local Phone Number	(812) 482-1600
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000055772
Current Fiscal Year End Date	--06-30
Document Period End Date	Dec. 31, 2020
Document Fiscal Year Focus	2021
Amendment Flag	false
Entity Small Business	false
Document Quarterly Report	true
Document Transition Report	false
Document Fiscal Period Focus	Q2
Security Exchange Name	NASDAQ
Trading Symbol	KBAL
Title of 12(b) Security	Class B Common Stock, par value $0.05 per share
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		191,587
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		36,690,325