v3.25.2
STOCK-BASED COMPENSATION - Additional Information (Details)
$ / shares in Units, $ in Millions
6 Months Ended 18 Months Ended 24 Months Ended 42 Months Ended
Jun. 30, 2025
USD ($)
installment
$ / shares
shares
Jun. 30, 2025
USD ($)
shares
Dec. 31, 2023
Jun. 30, 2025
USD ($)
shares
Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
Award expiration period 10 years      
Stock Option | Vesting in year 1        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage 33.00%      
Stock Option | Vesting in year 2        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting percentage 67.00%      
Employee Restricted Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
Share based compensation arrangement, award vesting period, number of installments | installment 3      
Compensation costs, unrecognized | $ $ 24.1 $ 24.1   $ 24.1
Compensation costs, recognition weighted average remaining period (in years) 2 years 1 month 6 days      
Granted (in usd per share) | $ / shares $ 31.12      
Granted (in shares) 565,000      
Performance Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation costs, unrecognized | $ $ 8.6 $ 8.6   $ 8.6
Compensation costs, recognition weighted average remaining period (in years) 1 year 10 months 24 days      
Granted (in usd per share) | $ / shares $ 31.68      
Granted (in shares) 246,000      
Performance Units | Executive Members        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance based compensation period   3 years 3 years 3 years
Accrual of units     25.00%  
Grant-date fair value (in usd per share) | $ / shares $ 38.26      
Units granted (in shares) 32,900      
Performance Units | Minimum | Executive Members        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Predefined percentage for calculation of performance unit awards   0.00%    
Predefined percentage for calculation of performance achievement unit awards   0.00% 0.00%  
Performance Units | Maximum | Executive Members        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Predefined percentage for calculation of performance unit awards   200.00%    
Predefined percentage for calculation of performance achievement unit awards   200.00% 150.00%  
TreeHouse Foods, Inc. Equity and Incentive Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum number of shares available to be awarded (in shares) 22,500,000 22,500,000   22,500,000