| Cover | Nov. 04, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Nov. 4, 2021 |
| Entity Registrant Name | KIMBALL INTERNATIONAL, INC. |
| Entity Incorporation, State or Country Code | IN |
| Entity File Number | 0-3279 |
| Entity Tax Identification Number | 35-0514506 |
| Entity Address, Address Line One | 1600 Royal Street |
| Entity Address, City or Town | Jasper |
| Entity Address, State or Province | IN |
| City Area Code | 812 |
| Local Phone Number | 482-1600 |
| Entity Address, Postal Zip Code | 47546-2256 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Class B Common Stock, par value $0.05 per share |
| Trading Symbol | KBAL |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000055772 |
| Amendment Flag | false |
