Restructuring and Related Activities - Summary of Incurred Costs (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($) facility	Dec. 31, 2024 USD ($)
Restructuring Cost and Reserve [Line Items]
Total restructuring-related costs	$ 11.2	$ 22.0
Amount of total that represents net cash charges	9.4	$ 15.6
Bedding Products
Restructuring Cost and Reserve [Line Items]
Number of facilities \| facility		50
Net restructuring and restructuring-related
Restructuring Cost and Reserve [Line Items]
Total restructuring-related costs	10.9	$ 19.4
Net restructuring and restructuring-related \| Bedding Products
Restructuring Cost and Reserve [Line Items]
Total restructuring-related costs	9.6	16.6
Impairment costs associated with this plan (See Note F)
Restructuring Cost and Reserve [Line Items]
Total restructuring-related costs	0.3	2.6
Minimum
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	65.0	65.0
Amount of total that represents net cash charges		$ 30.0
Minimum \| Forecast
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs			$ 40.0
Minimum \| Bedding Products
Restructuring Cost and Reserve [Line Items]
Number of facilities consolidated \| facility		15
Minimum \| Net restructuring and restructuring-related
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	40.0	$ 40.0
Minimum \| Impairment costs associated with this plan (See Note F)
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	25.0	25.0
Maximum
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	85.0	85.0
Amount of total that represents net cash charges		$ 40.0
Maximum \| Forecast
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs			$ 50.0
Maximum \| Bedding Products
Restructuring Cost and Reserve [Line Items]
Number of facilities consolidated \| facility		20
Maximum \| Net restructuring and restructuring-related
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	55.0	$ 55.0
Maximum \| Impairment costs associated with this plan (See Note F)
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs	$ 30.0	$ 30.0