v3.26.1
Earnings Per Share - Narrative (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jul. 04, 2026
Jun. 28, 2025
Jul. 04, 2026
Jun. 28, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potentially dilutive shares from stock-based compensation plans (in shares) 0.0 1.0 0.0 1.0
Kimball International, Inc | Common Stock        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Total number of shares for cash consideration (in shares)     25.2