Acquisitions (Narrative) (Details)					12 Months Ended
	Jun. 04, 2021 USD ($)	May 31, 2021 USD ($)	Jan. 30, 2021 USD ($)	Dec. 09, 2019 USD ($)	Dec. 31, 2021 USD ($) acquisition	Dec. 31, 2020 USD ($) acquisition	Dec. 31, 2019 USD ($) acquisition
Business Acquisition [Line Items]
Goodwill, expected to provide a tax benefit					$ 134,000,000.0
Contingent consideration, liability					0	$ 0
Additional consideration including interest paid					$ 200,000	$ 8,400,000	$ 1,100,000
Number of acquisitions | acquisition					3	0	2
Goodwill added					$ 70,900,000
Premium Foam and Bedding Manufacturer
Business Acquisition [Line Items]
Purchase price	$ 119,700,000
Goodwill added	$ 58,300,000
Polish Manufacturer
Business Acquisition [Line Items]
Purchase price		$ 5,400,000
Goodwill added		$ 4,400,000
UK Manufacturer
Business Acquisition [Line Items]
Purchase price			$ 27,700,000
Goodwill added			$ 8,200,000
ECS
Business Acquisition [Line Items]
Purchase price							$ 1,244,300,000
Goodwill added							559,300,000
ECS | Customer relationships (15-year life)
Business Acquisition [Line Items]
Other intangible assets							372,300,000
ECS | Technology (8 to 15-year life)
Business Acquisition [Line Items]
Other intangible assets							$ 173,300,000
Manufacturer And Distributor Of Geosynthetic And Mine Ventilation Products
Business Acquisition [Line Items]
Purchase price				$ 20,600,000
Goodwill added				$ 7,600,000