Reportable Segment Information - Schedule of Reportable Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 711.6	$ 598.8	$ 1,754.2	$ 1,792.9
Income (Loss) Before Income Taxes:	56.8	81.9	59.6	132.2
Gain on sale of subsidiary	0.0	50.6	0.0	50.6
Interest expense, net	9.4	2.4	17.5	6.5
Total	47.4	79.5	42.1	125.8
Depreciation and Amortization Expense:	25.6	21.0	68.3	63.5
Capital Expenditures (including capitalized software):	21.6	15.5	62.8	48.7
Identifiable Assets:	2,017.0		2,017.0		$ 1,414.5
Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	536.8	375.2	1,249.5	1,135.0
Residential building products
Segment Reporting Information [Line Items]
Net sales	174.8	223.6	504.7	657.9
Operating segments | Workplace furnishings
Segment Reporting Information [Line Items]
Net sales	536.8	375.2	1,249.5	1,135.0
Income (Loss) Before Income Taxes:	47.3	5.6	59.2	11.1
Depreciation and Amortization Expense:	16.8	11.3	41.7	34.6
Capital Expenditures (including capitalized software):	18.8	10.0	50.6	26.4
Identifiable Assets:	1,385.5		1,385.5		761.5
Operating segments | Residential building products
Segment Reporting Information [Line Items]
Net sales	174.8	223.6	504.7	657.9
Income (Loss) Before Income Taxes:	30.9	39.6	74.5	117.0
Depreciation and Amortization Expense:	3.5	3.2	10.2	9.3
Capital Expenditures (including capitalized software):	2.7	3.6	10.1	12.1
Identifiable Assets:	488.6		488.6		493.0
General corporate
Segment Reporting Information [Line Items]
Income (Loss) Before Income Taxes:	(21.4)	(14.0)	(74.0)	(46.5)
Depreciation and Amortization Expense:	5.4	6.5	16.4	19.6
Capital Expenditures (including capitalized software):	0.1	$ 1.8	2.1	$ 10.2
Identifiable Assets:	$ 142.9		$ 142.9		$ 160.0