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Goodwill and Other Intangible Assets (Changes In The Carrying Amounts Of Goodwill) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Roll Forward]    
Net goodwill, beginning of period $ 1,449.6 $ 1,388.8
Additions for current year acquisitions 42.5 70.9
Adjustments to prior year acquisitions 0.3  
Allocations to divested businesses (0.3) (1.3)
Foreign currency translation adjustment (17.7) (8.8)
Net goodwill, end of period 1,474.4 1,449.6
Gross goodwill 1,822.5  
Accumulated impairment losses (348.1)  
Goodwill 1,474.4 1,449.6
Bedding Products    
Goodwill [Roll Forward]    
Net goodwill, beginning of period 908.3 856.9
Additions for current year acquisitions 0.0 58.3
Adjustments to prior year acquisitions 0.0  
Allocations to divested businesses (0.3) (1.3)
Foreign currency translation adjustment (7.7) (5.6)
Net goodwill, end of period 900.3 908.3
Gross goodwill 905.7  
Accumulated impairment losses (5.4)  
Goodwill 900.3 908.3
Specialized Products    
Goodwill [Roll Forward]    
Net goodwill, beginning of period 192.7 187.0
Additions for current year acquisitions 39.0 8.2
Adjustments to prior year acquisitions 0.3  
Allocations to divested businesses 0.0 0.0
Foreign currency translation adjustment (4.6) (2.5)
Net goodwill, end of period 227.4 192.7
Gross goodwill 319.5  
Accumulated impairment losses (92.1)  
Goodwill 227.4 192.7
Furniture, Flooring & Textile Products    
Goodwill [Roll Forward]    
Net goodwill, beginning of period 348.6 344.9
Additions for current year acquisitions 3.5 4.4
Adjustments to prior year acquisitions 0.0  
Allocations to divested businesses 0.0 0.0
Foreign currency translation adjustment (5.4) (0.7)
Net goodwill, end of period 346.7 348.6
Gross goodwill 597.3  
Accumulated impairment losses (250.6)  
Goodwill $ 346.7 $ 348.6