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Restructuring and Restructuring Related Charges (Restructuring-Related Costs by Segment) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]      
Restructuring and restructuring-related $ (0.3) $ 7.9 $ 2.8
Bedding Products      
Restructuring Cost and Reserve [Line Items]      
Restructuring and restructuring-related 0.1 2.6 1.2
Specialized Products      
Restructuring Cost and Reserve [Line Items]      
Restructuring and restructuring-related (0.9) 3.9 0.0
Furniture, Flooring & Textile Products      
Restructuring Cost and Reserve [Line Items]      
Restructuring and restructuring-related $ 0.5 $ 1.4 $ 1.6