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Restructuring Expenses and Asset Impairments - Schedule of Pre-Tax Restructuring Expenses by Segment (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]      
Asset Impairments $ 0.7 $ 0.1 $ 0.8
Total restructuring costs and asset impairments 20.7 9.3 10.9
Severance Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 19.9 9.2 9.1
Exit Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 0.1 0.0 1.0
Operating Segments | HST      
Restructuring Cost and Reserve [Line Items]      
Asset Impairments 0.6 0.1 0.0
Total restructuring costs and asset impairments 12.5 5.9 6.6
Operating Segments | HST | Severance Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 11.8 5.8 6.4
Operating Segments | HST | Exit Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 0.1 0.0 0.2
Operating Segments | FMT      
Restructuring Cost and Reserve [Line Items]      
Asset Impairments 0.1 0.0 0.8
Total restructuring costs and asset impairments 5.0 2.4 2.9
Operating Segments | FMT | Severance Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 4.9 2.4 1.5
Operating Segments | FMT | Exit Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 0.0 0.0 0.6
Operating Segments | FSDP      
Restructuring Cost and Reserve [Line Items]      
Asset Impairments 0.0 0.0 0.0
Total restructuring costs and asset impairments 2.4 0.5 0.9
Operating Segments | FSDP | Severance Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 2.4 0.5 0.7
Operating Segments | FSDP | Exit Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 0.0 0.0 0.2
Corporate/Other      
Restructuring Cost and Reserve [Line Items]      
Asset Impairments 0.0 0.0 0.0
Total restructuring costs and asset impairments 0.8 0.5 0.5
Corporate/Other | Severance Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs 0.8 0.5 0.5
Corporate/Other | Exit Costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring costs $ 0.0 $ 0.0 $ 0.0