Impairment Charges (Schedule of Impairment Charges) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended			24 Months Ended
	Jun. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2025
Schedule Of Asset Impairment Charges [Line Items]
Other Long-Lived Assets Impairment		$ 19.0	$ 6.3	$ 443.7
Goodwill Impairment	$ 675.3	0.0	676.0	0.0
Total Impairments			682.3
2024 Restructuring Plan
Schedule Of Asset Impairment Charges [Line Items]
Restructuring and related costs		29.7	47.8		$ 77.5
Bedding Products
Schedule Of Asset Impairment Charges [Line Items]
Other Long-Lived Assets Impairment		17.8	4.6	443.7
Goodwill Impairment			587.9
Total Impairments			592.5
Specialized Products
Schedule Of Asset Impairment Charges [Line Items]
Other Long-Lived Assets Impairment		0.6	0.8	0.0
Goodwill Impairment			43.6
Total Impairments			44.4
Furniture, Flooring & Textile Products
Schedule Of Asset Impairment Charges [Line Items]
Other Long-Lived Assets Impairment		$ 0.6	0.9	$ 0.0
Goodwill Impairment			44.5
Total Impairments			$ 45.4