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v3.25.1

STOCK-BASED COMPENSATION - Additional Information (Details) $ / shares in Units, $ in Millions | 3 Months Ended | 15 Months Ended | 24 Months Ended | 39 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2025 USD ($) installment $ / shares shares | Mar. 31, 2025 USD ($) shares | Dec. 31, 2023 | Mar. 31, 2025 USD ($) shares
Stock Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 3 years |  |  |
Award expiration period | 10 years |  |  |
Compensation costs, unrecognized | $ | $ 0.2 | $ 0.2 |  | $ 0.2
Compensation costs, recognition weighted average remaining period (in years) | 2 months 12 days |  |  |
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 |  |  |
Compensation costs, unrecognized | $ | $ 31.6 | 31.6 |  | 31.6
Compensation costs, recognition weighted average remaining period (in years) | 2 years 3 months 18 days |  |  |
Share based compensation arrangement, award vesting period, number of installments | installment | 3 |  |  |
Granted (in usd per share) | $ / shares | $ 31.17 |  |  |
Granted (in shares) | 562,000 |  |  |
Performance Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation costs, unrecognized | $ | $ 11.0 | $ 11.0 |  | $ 11.0
Compensation costs, recognition weighted average remaining period (in years) | 2 years 1 month 6 days |  |  |
Granted (in usd per share) | $ / shares | $ 31.81 |  |  |
Granted (in shares) | 242,000 |  |  |
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

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