Reportable Segment Information - Schedule of Reportable Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024	Dec. 28, 2024
Segment Reporting Information [Line Items]
Net sales	$ 667.1	$ 623.7	$ 1,266.8	$ 1,211.7
Cost of Sales:	380.9	362.4	742.3	717.5
Selling and Administrative Expenses:	215.5	205.9	423.1	409.0
Restructuring, Impairment, and Loss on Divestiture:	2.5	2.0	8.9	2.1
Total	68.2	53.4	92.6	83.1
Interest Expense, Net	6.1	7.4	11.7	15.1
Income Before Income Taxes	62.0	46.0	80.9	68.0
Depreciation and Amortization Expense:	25.0	26.4	50.5	52.8
Capital Expenditures (including capitalized software):	15.0	17.5	31.2	28.7
Identifiable Assets:	1,912.0		1,912.0		$ 1,875.1
Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	516.0	480.2	957.0	920.0
Residential building products
Segment Reporting Information [Line Items]
Net sales	151.1	143.5	309.8	291.7
Operating segments | Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	516.0	480.2	957.0	920.0
Cost of Sales:	298.4	281.3	571.7	554.1
Selling and Administrative Expenses:	149.7	142.6	293.1	283.2
Restructuring, Impairment, and Loss on Divestiture:	2.0	2.0	8.4	2.1
Total	65.8	54.3	83.8	80.6
Depreciation and Amortization Expense:	16.3	17.8	33.4	35.6
Capital Expenditures (including capitalized software):	9.9	12.3	20.8	18.4
Identifiable Assets:	1,333.4		1,333.4		1,282.6
Operating segments | Residential building products
Segment Reporting Information [Line Items]
Net sales	151.1	143.5	309.8	291.7
Cost of Sales:	82.4	81.1	170.6	163.4
Selling and Administrative Expenses:	45.0	42.6	90.6	87.2
Total	23.7	19.8	48.6	41.1
Depreciation and Amortization Expense:	3.7	3.6	7.3	7.1
Capital Expenditures (including capitalized software):	2.3	1.8	5.5	4.3
Identifiable Assets:	459.3		459.3		465.8
General corporate
Segment Reporting Information [Line Items]
Selling and Administrative Expenses:	20.7	20.7	39.3	38.6
Restructuring, Impairment, and Loss on Divestiture:	0.6	0.0	0.6	0.0
Total	(21.3)	(20.7)	(39.9)	(38.6)
Depreciation and Amortization Expense:	4.9	5.0	9.8	10.1
Capital Expenditures (including capitalized software):	2.9	$ 3.4	4.9	$ 5.9
Identifiable Assets:	$ 119.3		$ 119.3		$ 126.7