Reportable Segment Information - Schedule of Reportable Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 563.5	$ 621.7	$ 1,042.5	$ 1,194.1
Income (Loss) Before Income Taxes:	(3.6)	29.9	2.9	50.3
Interest expense, net	5.5	2.1	8.2	4.1
Total	(9.0)	27.8	(5.3)	46.2
Depreciation and Amortization Expense:	22.6	21.3	42.7	42.4
Capital Expenditures (including capitalized software):	21.1	15.0	41.2	33.2
Identifiable Assets:	2,075.6		2,075.6		$ 1,414.5
Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	413.0	406.7	712.7	759.8
Residential building products
Segment Reporting Information [Line Items]
Net sales	150.4	215.1	329.8	434.3
Operating segments | Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	413.0	406.7	712.7	759.8
Income (Loss) Before Income Taxes:	15.9	11.9	11.9	5.5
Depreciation and Amortization Expense:	13.8	11.7	25.0	23.2
Capital Expenditures (including capitalized software):	17.9	8.2	31.8	16.4
Identifiable Assets:	1,440.8		1,440.8		761.5
Operating segments | Residential building products
Segment Reporting Information [Line Items]
Net sales	150.4	215.1	329.8	434.3
Income (Loss) Before Income Taxes:	15.6	37.0	43.6	77.3
Depreciation and Amortization Expense:	3.4	3.1	6.7	6.1
Capital Expenditures (including capitalized software):	2.4	2.7	7.4	8.5
Identifiable Assets:	491.5		491.5		493.0
General corporate
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes:	(35.0)	(19.0)	(52.7)	(32.5)
Depreciation and Amortization Expense:	5.4	6.6	11.0	13.1
Capital Expenditures (including capitalized software):	0.9	$ 4.1	2.0	$ 8.4
Identifiable Assets:	$ 143.3		$ 143.3		$ 160.0