v3.25.2
STOCK-BASED COMPENSATION - Shareholder Return Market Condition and Assumptions (Details) - Performance Units
6 Months Ended
Jun. 30, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Dividend yield 0.00%
Risk-free rate 4.01%
Expected term (in years) 2 years 10 months 2 days
Expected volatility (TreeHouse Foods, Inc.)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected volatility 33.68%
Expected volatility (Peer Group)  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected volatility 36.45%