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Restructuring and Impairment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jul. 01, 2023
Jul. 02, 2022
Jul. 01, 2023
Jul. 02, 2022
Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]          
Restructuring costs $ 7.8 $ 1.2 $ 8.3 $ 1.4  
Restructuring reserve 6.3   6.3   $ 0.5
Inventory valuation | Workplace furnishings          
Restructuring Cost and Reserve [Line Items]          
Restructuring costs (0.4) 0.1 (0.3) 0.2  
Facility set-up costs | Workplace furnishings          
Restructuring Cost and Reserve [Line Items]          
Restructuring costs 0.2 0.1 0.5 0.2  
Long-lived asset impairments | Workplace furnishings          
Restructuring Cost and Reserve [Line Items]          
Restructuring costs 2.1 0.0 2.1 0.0  
Exit costs | Workplace furnishings          
Restructuring Cost and Reserve [Line Items]          
Restructuring costs 6.0 0.0 6.0 0.0  
Investment impairment | General Corporate          
Restructuring Cost and Reserve [Line Items]          
Restructuring costs $ 0.0 $ 1.0 $ 0.0 $ 1.0