v3.26.1
Goodwill Impairment Testing (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Goodwill [Line Items]      
Goodwill value $ 745.1   $ 751.4
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow 2.50%   3.00%
Goodwill impairment $ 0.0 $ 0.0  
Bedding      
Goodwill [Line Items]      
Goodwill value $ 320.8   $ 323.7
Percentage of fair value in excess of carrying amount (as a percent) 10.00% 20.00%  
Home furniture      
Goodwill [Line Items]      
Goodwill value $ 68.5   68.4
Percentage of fair value in excess of carrying amount (as a percent) 5.00% 35.00%  
Increase discount rate (as percent) 1.00%    
Goodwill impairment $ 0.0    
Work furniture      
Goodwill [Line Items]      
Goodwill value $ 54.6   $ 55.0
Percentage of fair value in excess of carrying amount (as a percent) 10.00% 30.00%  
Minimum      
Goodwill [Line Items]      
Compound Annual Growth Rate (CAGR) Range for Sales (1.00%)   (2.00%)
Discount rate ranges (as a percent) 17.00%   15.00%
Maximum      
Goodwill [Line Items]      
Compound Annual Growth Rate (CAGR) Range for Sales 4.00%   4.00%
Discount rate ranges (as a percent) 19.00%   17.00%
Less than 25%      
Goodwill [Line Items]      
Fair Value over Carrying Value divided by Carrying Value 25.00%    
Goodwill value $ 443.9    
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow 2.50%    
Less than 25% | Minimum      
Goodwill [Line Items]      
Compound Annual Growth Rate (CAGR) Range for Sales 2.00%    
Discount rate ranges (as a percent) 17.00%    
Less than 25% | Maximum      
Goodwill [Line Items]      
Compound Annual Growth Rate (CAGR) Range for Sales 4.00%    
Discount rate ranges (as a percent) 19.00%    
25% - 50%      
Goodwill [Line Items]      
Goodwill value $ 301.2    
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow 2.50%    
Discount rate ranges (as a percent) 17.00%    
25% - 50% | Minimum      
Goodwill [Line Items]      
Fair Value over Carrying Value divided by Carrying Value 25.00%    
Compound Annual Growth Rate (CAGR) Range for Sales (1.00%)    
25% - 50% | Maximum      
Goodwill [Line Items]      
Fair Value over Carrying Value divided by Carrying Value 50.00%    
Compound Annual Growth Rate (CAGR) Range for Sales 4.00%    
Less than 50%      
Goodwill [Line Items]      
Fair Value over Carrying Value divided by Carrying Value     50.00%
Goodwill value     $ 447.1
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow     3.00%
Less than 50% | Minimum      
Goodwill [Line Items]      
Compound Annual Growth Rate (CAGR) Range for Sales     1.00%
Discount rate ranges (as a percent)     15.00%
Less than 50% | Maximum      
Goodwill [Line Items]      
Compound Annual Growth Rate (CAGR) Range for Sales     4.00%
Discount rate ranges (as a percent)     17.00%
51% - 100%      
Goodwill [Line Items]      
Goodwill value     $ 304.3
Terminal Values Long-term Growth Rate for Debt-Free Cash Flow     3.00%
51% - 100% | Minimum      
Goodwill [Line Items]      
Fair Value over Carrying Value divided by Carrying Value     51.00%
Compound Annual Growth Rate (CAGR) Range for Sales     (2.00%)
Discount rate ranges (as a percent)     15.00%
51% - 100% | Maximum      
Goodwill [Line Items]      
Fair Value over Carrying Value divided by Carrying Value     100.00%
Compound Annual Growth Rate (CAGR) Range for Sales     4.00%
Discount rate ranges (as a percent)     17.00%