Reportable Segment Information - Schedule of Reportable Segment Data (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2025	Mar. 30, 2024	Dec. 28, 2024
Segment Reporting Information [Line Items]
Net sales	$ 599.8	$ 588.0
Cost of Sales:	361.4	355.1
Selling and Administrative Expenses:	207.6	203.1
Restructuring and Impairment Charges:	6.4	0.1
Total	24.4	29.7
Interest Expense, Net	5.5	7.6
Income Before Income Taxes	18.9	22.0
Depreciation and Amortization Expense:	25.5	26.4
Capital Expenditures (including capitalized software):	16.3	11.2
Identifiable Assets:	1,858.1		$ 1,875.1
Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	441.1	439.8
Residential building products
Segment Reporting Information [Line Items]
Net sales	158.7	148.2
Operating segments | Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	441.1	439.8
Cost of Sales:	273.3	272.8
Selling and Administrative Expenses:	143.4	140.6
Restructuring and Impairment Charges:	6.4	0.1
Total	18.0	26.3
Depreciation and Amortization Expense:	17.1	17.8
Capital Expenditures (including capitalized software):	11.0	6.2
Identifiable Assets:	1,278.7		1,282.6
Operating segments | Residential building products
Segment Reporting Information [Line Items]
Net sales	158.7	148.2
Cost of Sales:	88.1	82.3
Selling and Administrative Expenses:	45.7	44.5
Total	25.0	21.4
Depreciation and Amortization Expense:	3.6	3.5
Capital Expenditures (including capitalized software):	3.2	2.5
Identifiable Assets:	458.7		465.8
General corporate
Segment Reporting Information [Line Items]
Selling and Administrative Expenses:	18.6	18.0
Total	(18.6)	(18.0)
Depreciation and Amortization Expense:	4.9	5.1
Capital Expenditures (including capitalized software):	2.0	$ 2.5
Identifiable Assets:	$ 120.6		$ 126.7