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STOCK-BASED COMPENSATION - Narrative (Details)
shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
shares
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jul. 02, 2025
employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized compensation cost $ 43.6 $ 43.6      
Income tax benefit   $ 9.8 $ 4.3 $ 4.5  
Unrecognized compensation costs, period for recognition   2 years      
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Income tax benefit   $ 3.8 1.3 1.5  
Ralliant Stock Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of employees, awards replaced | employee         500
Number of days used to calculate volume-weighted average price         3 days
Common stock, shares issued (in shares) | shares 3.8        
Unrecognized compensation cost $ 22.4 22.4      
Income tax benefit $ 4.1 $ 0.1 $ 1.2 $ 2.5  
Ralliant Stock Plan | Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period   4 years      
Award termination period   10 years      
Ralliant Stock Plan | Time-based RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period   4 years