Goodwill (Details) $ in Millions	6 Months Ended
	Jun. 30, 2026 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 4,595.9
Foreign currency translation and other	(11.4)
Ending balance	4,584.5
Mattress Firm
Goodwill [Roll Forward]
Beginning balance	3,493.9
Foreign currency translation and other	0.0
Ending balance	3,493.9
Tempur Sealy North America
Goodwill [Roll Forward]
Beginning balance	607.0
Foreign currency translation and other	(1.9)
Ending balance	605.1
Tempur Sealy International
Goodwill [Roll Forward]
Beginning balance	495.0
Foreign currency translation and other	(9.5)
Ending balance	$ 485.5