Restructuring and Related Activities (Summary of Restructuring-Related Costs by Segment) (Details) - 2024 Restructuring Plan - USD ($) $ in Millions	12 Months Ended		24 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 29.7	$ 47.8	$ 77.5
Other restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	10.7	43.6	$ 54.3
Other restructuring | Bedding Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	5.6	33.9
Other restructuring | Specialized Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	3.5	7.4
Other restructuring | Furniture, Flooring & Textile Products
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 1.6	$ 2.3