Goodwill and Other Intangible Assets - Schedule of Activity in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	Mar. 29, 2025	Dec. 28, 2024
Goodwill [Line Items]
Goodwill	$ 506.8	$ 520.7
Accumulated impairment losses	(64.7)	(78.6)
Goodwill, net	442.1	442.1
Goodwill derecognized	(13.9)
Accumulated impairment losses derecognized	13.9
Workplace Furnishings
Goodwill [Line Items]
Goodwill	284.4	298.3
Accumulated impairment losses	(64.6)	(78.5)
Goodwill, net	219.8	219.8
Goodwill derecognized	(13.9)
Accumulated impairment losses derecognized	13.9
Residential Building Products
Goodwill [Line Items]
Goodwill	222.4	222.4
Accumulated impairment losses	(0.1)	(0.1)
Goodwill, net	222.3	$ 222.3
Goodwill derecognized	0.0
Accumulated impairment losses derecognized	$ 0.0