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Segment Information - Schedule of Segment Results from Continuing Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025
Segment Reporting [Line Items] |  |  |  |
Net trade sales | $ 999.7 | $ 1,058.0 | $ 1,917.9 | $ 2,080.1
Segment EBIT | 80.1 | 90.4 | 124.6 | 153.3
Interest expense net of interest income | (11.7) | (18.7) | (24.3) | (36.5)
Earnings before income taxes | 68.4 | 71.7 | 100.3 | 116.8
Somnigroup International Inc. merger costs (See Note A) | 10.1 | 0.0 | 13.6 | 0.0
Specialized Products |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 247.0 | 304.1 | 491.1 | 604.2
Furniture, Flooring & Textile Products |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 365.8 | 362.5 | 675.0 | 693.8
Operating segments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 1,007.3 | 1,064.7 | 1,934.4 | 2,094.5
Depreciation and amortization | 25.6 | 26.1 | 50.4 | 54.4
Nonoperating assets depreciation and amortization | 2.9 | 3.6 | 6.3 | 6.9
Total depreciation and amortization | 28.5 | 29.7 | 56.7 | 61.3
Restructuring, restructuring-related, and impairment charges | 10.3 | 3.6 | 15.2 | 10.5
Gain on sale of real estate | (11.5) | (18.4) | (21.0) | (21.6)
Other segment items | 889.8 | 959.5 | 1,745.5 | 1,891.2
Segment EBIT | 90.2 | 90.3 | 138.0 | 153.1
Operating segments | Reportable Subsegments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 999.7 | 1,058.0 | 1,917.9 | 2,080.1
Operating segments | Intersubsegment Eliminations |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 7.6 | 6.7 | 16.5 | 14.4
Operating segments | Bedding Products |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 392.5 | 396.6 | 763.2 | 792.5
Depreciation and amortization | 13.4 | 13.3 | 25.8 | 26.3
Nonoperating assets depreciation and amortization | 1.1 | 1.3 | 2.5 | 2.6
Total depreciation and amortization | 14.5 | 14.6 | 28.3 | 28.9
Restructuring, restructuring-related, and impairment charges | 6.0 | 2.1 | 10.7 | 5.5
Gain on sale of real estate | (11.5) | (16.7) | (21.0) | (16.7)
Other segment items | 341.4 | 369.4 | 677.4 | 738.0
Segment EBIT | 42.1 | 27.2 | 67.8 | 36.8
Operating segments | Bedding Products | Reportable Subsegments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 386.9 | 391.4 | 751.8 | 782.1
Operating segments | Bedding Products | Intersubsegment Eliminations |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 5.6 | 5.2 | 11.4 | 10.4
Operating segments | Specialized Products |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 247.9 | 304.2 | 493.3 | 604.5
Depreciation and amortization | 8.5 | 8.2 | 16.6 | 18.6
Nonoperating assets depreciation and amortization | 0.7 | 1.1 | 1.6 | 2.0
Total depreciation and amortization | 9.2 | 9.3 | 18.2 | 20.6
Restructuring, restructuring-related, and impairment charges | 3.3 | 0.6 | 3.3 | 4.0
Gain on sale of real estate | 0.0 | (1.7) | 0.0 | (1.7)
Other segment items | 216.2 | 257.3 | 434.9 | 514.5
Segment EBIT | 19.2 | 38.7 | 36.9 | 67.1
Operating segments | Specialized Products | Reportable Subsegments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 247.0 | 304.1 | 491.1 | 604.2
Operating segments | Specialized Products | Intersubsegment Eliminations |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 0.9 | 0.1 | 2.2 | 0.3
Operating segments | Furniture, Flooring & Textile Products |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 366.9 | 363.9 | 677.9 | 697.5
Depreciation and amortization | 3.7 | 4.6 | 8.0 | 9.5
Nonoperating assets depreciation and amortization | 1.1 | 1.2 | 2.2 | 2.3
Total depreciation and amortization | 4.8 | 5.8 | 10.2 | 11.8
Restructuring, restructuring-related, and impairment charges | 1.0 | 0.9 | 1.2 | 1.0
Gain on sale of real estate | 0.0 | 0.0 | 0.0 | (3.2)
Other segment items | 332.2 | 332.8 | 633.2 | 638.7
Segment EBIT | 28.9 | 24.4 | 33.3 | 49.2
Operating segments | Furniture, Flooring & Textile Products | Reportable Subsegments |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 365.8 | 362.5 | 675.0 | 693.8
Operating segments | Furniture, Flooring & Textile Products | Intersubsegment Eliminations |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Net trade sales | 1.1 | 1.4 | 2.9 | 3.7
Intersegment eliminations |  |  |  |
Segment Reporting [Line Items] |  |  |  |
Segment EBIT | $ (10.1) | $ 0.1 | $ (13.4) | $ 0.2

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