Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 01, 2022	Oct. 02, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 598.8	$ 586.7	$ 1,792.9	$ 1,581.5
Workplace furnishings
Disaggregation of Revenue [Line Items]
Net sales	375.2	393.1	1,135.0	1,040.0
Workplace furnishings | Systems and storage
Disaggregation of Revenue [Line Items]
Net sales	224.9	227.8	673.9	611.1
Workplace furnishings | Seating
Disaggregation of Revenue [Line Items]
Net sales	114.8	134.2	354.7	349.6
Workplace furnishings | Other
Disaggregation of Revenue [Line Items]
Net sales	35.5	31.1	106.4	79.4
Residential building products
Disaggregation of Revenue [Line Items]
Net sales	$ 223.6	$ 193.6	$ 657.9	$ 541.5