Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
Disaggregation of Revenue [Line Items]
Net sales	$ 588.0	$ 479.1
Workplace furnishings
Disaggregation of Revenue [Line Items]
Net sales	439.8	299.6
Workplace furnishings | Systems and storage
Disaggregation of Revenue [Line Items]
Net sales	279.5	182.3
Workplace furnishings | Seating
Disaggregation of Revenue [Line Items]
Net sales	126.0	93.5
Workplace furnishings | Other
Disaggregation of Revenue [Line Items]
Net sales	34.2	23.9
Residential building products
Disaggregation of Revenue [Line Items]
Net sales	$ 148.2	$ 179.4