Acquisitions and Divestitures - Narrative (Details) - USD ($) $ in Millions	9 Months Ended	16 Months Ended
	Sep. 30, 2023	Sep. 28, 2024	Sep. 12, 2023
Poppin
Schedule Of Asset Acquisition [Line Items]
Cash and cash equivalents			$ 2.7
Poppin | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Schedule Of Asset Acquisition [Line Items]
Inventories			9.7
Prepaid expenses and other current assets			3.1
Accounts payable and accrued expenses			7.0
Current lease obligations - operating			$ 3.0
Kimball International, Inc
Schedule Of Asset Acquisition [Line Items]
Transaction expenses		$ 41.1
Kimball International, Inc | Long-Term Debt
Schedule Of Asset Acquisition [Line Items]
Transaction costs		2.8
Kimball International, Inc | Other Noncurrent Assets
Schedule Of Asset Acquisition [Line Items]
Transaction costs		0.2
Kimball International, Inc | Additional Paid-in Capital
Schedule Of Asset Acquisition [Line Items]
Transaction costs		0.3
Kimball International, Inc | General Corporate
Schedule Of Asset Acquisition [Line Items]
Transaction expenses	$ 26.4	28.6
Kimball International, Inc | Workplace furnishings
Schedule Of Asset Acquisition [Line Items]
Transaction expenses	$ 11.1	$ 12.5