Business Segment Information - Schedule of Total Assets and Long-lived Assets by Segment (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Segment Reporting [Line Items]
Total assets	$ 11,611.0	$ 11,600.7
Property, plant and equipment, net	1,009.7	1,019.2
Operating lease assets	1,893.5	1,878.8
Operating Segments | Mattress Firm
Segment Reporting [Line Items]
Total assets	8,128.2	7,929.7
Property, plant and equipment, net	300.6	270.7
Operating lease assets	1,363.6	1,344.9
Operating Segments | Tempur Sealy North America
Segment Reporting [Line Items]
Total assets	6,263.4	5,717.9
Property, plant and equipment, net	573.5	609.9
Operating lease assets	309.4	315.2
Operating Segments | Tempur Sealy International
Segment Reporting [Line Items]
Total assets	1,463.5	1,542.3
Property, plant and equipment, net	106.2	110.8
Operating lease assets	218.4	215.9
Corporate
Segment Reporting [Line Items]
Total assets	3,087.7	2,588.7
Property, plant and equipment, net	29.4	27.8
Operating lease assets	2.1	2.8
Inter-segment eliminations
Segment Reporting [Line Items]
Total assets	$ (7,331.8)	$ (6,177.9)