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Discontinued operations - Narrative (Details)
$ in Millions
3 Months Ended
Oct. 06, 2025
USD ($)
Nov. 12, 2024
Mar. 31, 2026
USD ($)
reportable_segment
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Apr. 16, 2024
lawsuit
Discontinued Operations [Line Items]            
Number of reportable segments | reportable_segment     1      
Discontinued operations, outstanding minimum lease payments for the lease terminations     $ 2.1      
Number of pending litigation claims | lawsuit           2
Argonaut Legal Contingency            
Discontinued Operations [Line Items]            
Loss contingency accrual         $ 4.0  
Global Cooling            
Discontinued Operations [Line Items]            
Payments for legal settlements     $ 2.5 $ 0.9    
Discontinued Operations, Disposed of by Sale | SAVSU            
Discontinued Operations [Line Items]            
Disposal group, including discontinued operation, goodwill $ 3.7          
Disposal group, including discontinued operation, period of recording services (in days) 120 days          
Competition covenant period (in years) 5 years 5 years        
Discontinued Operations, Disposed of by Sale | SAVSU | Stock Compensation Expense            
Discontinued Operations [Line Items]            
Restructuring costs $ 1.3