Goodwill and Other Intangible Assets (Changes In The Carrying Amounts Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Net goodwill, beginning of period	$ 1,474.4	$ 1,449.6
Additions for current year acquisitions		42.5
Adjustments to prior year acquisitions	3.7	0.3
Allocations to divested businesses		(0.3)
Foreign currency translation adjustment	11.7	(17.7)
Net goodwill, end of period	1,489.8	1,474.4
Gross goodwill	1,837.9
Accumulated impairment losses	(348.1)
Goodwill	1,489.8	1,474.4
Bedding Products
Goodwill [Roll Forward]
Net goodwill, beginning of period	900.3	908.3
Additions for current year acquisitions		0.0
Adjustments to prior year acquisitions	0.0	0.0
Allocations to divested businesses		(0.3)
Foreign currency translation adjustment	6.2	(7.7)
Net goodwill, end of period	906.5	900.3
Gross goodwill	911.9
Accumulated impairment losses	(5.4)
Goodwill	906.5	900.3
Specialized Products
Goodwill [Roll Forward]
Net goodwill, beginning of period	227.4	192.7
Additions for current year acquisitions		39.0
Adjustments to prior year acquisitions	2.9	0.3
Allocations to divested businesses		0.0
Foreign currency translation adjustment	3.4	(4.6)
Net goodwill, end of period	233.7	227.4
Gross goodwill	325.8
Accumulated impairment losses	(92.1)
Goodwill	233.7	227.4
Furniture, Flooring & Textile Products
Goodwill [Roll Forward]
Net goodwill, beginning of period	346.7	348.6
Additions for current year acquisitions		3.5
Adjustments to prior year acquisitions	0.8	0.0
Allocations to divested businesses		0.0
Foreign currency translation adjustment	2.1	(5.4)
Net goodwill, end of period	349.6	346.7
Gross goodwill	600.2
Accumulated impairment losses	(250.6)
Goodwill	$ 349.6	$ 346.7