SEC Info℠  
    Home      Search      My Interests      Help      Sign In      Please Sign In

TreeHouse Foods, Inc. – ‘10-K’ for 12/31/21 – ‘XML’

On:  Tuesday, 2/15/22, at 4:21pm ET   ·   For:  12/31/21   ·   Accession #:  1320695-22-9   ·   File #:  1-32504

Previous ‘10-K’:  ‘10-K’ on 2/11/21 for 12/31/20   ·   Next:  ‘10-K’ on 2/13/23 for 12/31/22   ·   Latest:  ‘10-K’ on 2/16/24 for 12/31/23   ·   29 References:   

Find Words in Filings emoji
 		  in    Show  and   ↓Hints

  As Of               Filer                 Filing    For·On·As Docs:Size

 2/15/22  TreeHouse Foods, Inc.             10-K       12/31/21  153:18M

Annual Report   —   Form 10-K

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-K        Annual Report                                       HTML   1.71M 
 2: EX-10.27    Material Contract                                   HTML     76K 
 3: EX-10.28    Material Contract                                   HTML     63K 
 4: EX-10.29    Material Contract                                   HTML    925K 
 5: EX-21.1     Subsidiaries List                                   HTML     47K 
 6: EX-22       Published Report re: Matters Submitted to a Vote    HTML     45K 
                of Security Holders                                              
 7: EX-23.1     Consent of Expert or Counsel                        HTML     41K 
 8: EX-31.1     Certification -- §302 - SOA'02                      HTML     45K 
 9: EX-31.2     Certification -- §302 - SOA'02                      HTML     46K 
10: EX-32.1     Certification -- §906 - SOA'02                      HTML     42K 
11: EX-32.2     Certification -- §906 - SOA'02                      HTML     42K 
17: R1          Cover Page                                          HTML    107K 
18: R2          Audit Information                                   HTML     46K 
19: R3          Consolidated Balance Sheets                         HTML    153K 
20: R4          Consolidated Balance Sheets (Parenthetical)         HTML     57K 
21: R5          Consolidated Statements of Operations               HTML    168K 
22: R6          Consolidated Statements of Comprehensive Income     HTML     68K 
                (Loss)                                                           
23: R7          Consolidated Statements of Stockholders' Equity     HTML     90K 
24: R8          Consolidated Statements of Cash Flows               HTML    186K 
25: R9          Summary of Significant Accounting Policies          HTML     75K 
26: R10         Recently Issued Accounting Pronouncements           HTML     55K 
27: R11         Growth, Reinvestment, and Restructuring Programs    HTML     92K 
28: R12         Leases                                              HTML    180K 
29: R13         Receivables Sales Program                           HTML     56K 
30: R14         Inventories                                         HTML     49K 
31: R15         Acquisitions and Divestitures                       HTML    102K 
32: R16         Property, Plant, and Equipment                      HTML     57K 
33: R17         Goodwill and Intangible Assets                      HTML    102K 
34: R18         Accrued Expenses                                    HTML     54K 
35: R19         Income Taxes                                        HTML    149K 
36: R20         Long-Term Debt                                      HTML     80K 
37: R21         Stockholders' Equity                                HTML     57K 
38: R22         Earnings Per Share                                  HTML     52K 
39: R23         Stock-Based Compensation                            HTML    112K 
40: R24         Accumulated Other Comprehensive Loss                HTML     68K 
41: R25         Employee Pension and Postretirement Benefit Plans   HTML    234K 
42: R26         Other Operating Expense, Net                        HTML     52K 
43: R27         Commitments and Contingencies                       HTML     60K 
44: R28         Derivative Instruments                              HTML     89K 
45: R29         Segment and Geographic Information and Major        HTML    130K 
                Customers                                                        
46: R30         Schedule II - Valuation and Qualifying Accounts     HTML     50K 
47: R31         Summary of Significant Accounting Policies          HTML    129K 
                (Policies)                                                       
48: R32         Summary of Significant Accounting Policies          HTML     97K 
                (Tables)                                                         
49: R33         Growth, Reinvestment, and Restructuring Programs    HTML     86K 
                (Tables)                                                         
50: R34         Leases (Tables)                                     HTML    129K 
51: R35         Receivable Sales Program (Tables)                   HTML     53K 
52: R36         Inventories (Tables)                                HTML     50K 
53: R37         Acquisitions and Divestitures (Tables)              HTML     96K 
54: R38         Property, Plant, and Equipment (Tables)             HTML     55K 
55: R39         Goodwill and Intangible Assets (Tables)             HTML    147K 
56: R40         Accrued Expenses (Tables)                           HTML     54K 
57: R41         Income Taxes (Tables)                               HTML    153K 
58: R42         Long-Term Debt (Tables)                             HTML     62K 
59: R43         Stockholders' Equity (Tables)                       HTML     51K 
60: R44         Earnings Per Share (Tables)                         HTML     51K 
61: R45         Stock-Based Compensation (Tables)                   HTML    120K 
62: R46         Accumulated Other Comprehensive Loss (Tables)       HTML     68K 
63: R47         Employee Pension and Postretirement Benefit Plans   HTML    244K 
                (Tables)                                                         
64: R48         Other Operating Expense, Net (Tables)               HTML     53K 
65: R49         Derivative Instruments (Tables)                     HTML     85K 
66: R50         Segment and Geographic Information and Major        HTML    123K 
                Customers (Tables)                                               
67: R51         Summary of Significant Accounting Policies -        HTML     58K 
                Additional Information (Details)                                 
68: R52         Summary of Significant Accounting Policies -        HTML     54K 
                Estimated Useful Lives of Assets (Details)                       
69: R53         Summary of Significant Accounting Policies -        HTML     60K 
                Estimated Useful Lives of Intangible Assets                      
                (Details)                                                        
70: R54         Growth, Reinvestment, and Restructuring Programs -  HTML     68K 
                Additional Information (Details)                                 
71: R55         Growth, Reinvestment, and Restructuring Programs -  HTML     69K 
                Aggregate Expenses Incurred Associated with                      
                Facility Closure (Details)                                       
72: R56         Growth, Reinvestment, and Restructuring Programs -  HTML     55K 
                Reconciliation of Liabilities (Details)                          
73: R57         Leases - Additional Information (Details)           HTML     50K 
74: R58         Leases - Supplemental Balance Sheet Information     HTML     72K 
                Related to Leases (Details)                                      
75: R59         Leases - Weighted-average Discount Rates for        HTML     45K 
                Operating and Finance Leases (Details)                           
76: R60         Leases - Weighted-average Remaining Lease Term of   HTML     46K 
                Operating and Finance Leases (Details)                           
77: R61         Leases - Components of Lease Expense (Details)      HTML     56K 
78: R62         Leases - Operating and Finance Lease Liability      HTML     84K 
                (Details)                                                        
79: R63         Leases - Other Information Relating to Leases       HTML     48K 
                (Details)                                                        
80: R64         Receivables Sales Program - Additional Information  HTML     51K 
                (Detail)                                                         
81: R65         Receivables Sales Program - Accounts Receivable     HTML     49K 
                Sold the Receivable Sales Program (Details)                      
82: R66         Inventories (Details)                               HTML     48K 
83: R67         Acquisitions and Divestitures - Additional          HTML    174K 
                Information (Details)                                            
84: R68         Acquisitions and Divestitures - Purchase Price      HTML     77K 
                Allocation to Net Tangible and Intangible Assets                 
                Acquired and Liabilities Assumed (Details)                       
85: R69         Acquisitions and Divestitures - Pro Forma           HTML     46K 
                Information (Detail)                                             
86: R70         Acquisitions and Divestitures - Results of          HTML     66K 
                Discontinued Operations on Income Statement                      
                (Details)                                                        
87: R71         Acquisitions and Divestitures - Results of          HTML     75K 
                Discontinued Operations on Balance Sheet (Details)               
88: R72         Property, Plant, and Equipment - (Details)          HTML     59K 
89: R73         Property, Plant, and Equipment - Additional         HTML     53K 
                Information (Details)                                            
90: R74         Goodwill and Intangible Assets - Changes in         HTML     72K 
                Carrying Amount of Goodwill (Details)                            
91: R75         Goodwill and Intangible Assets - Additional         HTML     51K 
                Information (Details)                                            
92: R76         Goodwill and Intangible Assets - Gross Carrying     HTML     77K 
                Amounts and Accumulated Amortization of Intangible               
                Assets, with Finite Lives (Details)                              
93: R77         Goodwill and Intangible Assets - Estimated          HTML     52K 
                Amortization Expense on Intangible Assets                        
                (Details)                                                        
94: R78         Accrued Expenses (Details)                          HTML     63K 
95: R79         Income Taxes - Components of Loss Before Income     HTML     51K 
                Taxes (Details)                                                  
96: R80         Income Taxes - Components of Provision for Income   HTML     69K 
                Taxes (Details)                                                  
97: R81         Income Taxes - Reconciliation of Income Tax         HTML     76K 
                Expense Computed at U.S. Federal Statutory Tax                   
                Rate to Income Tax Expense (Details)                             
98: R82         Income Taxes - Tax Effects of Temporary             HTML     77K 
                Differences Giving Rise to Deferred Income Tax                   
                Assets and Liabilities (Details)                                 
99: R83         Income Taxes - Income Taxes - Details of Tax        HTML     70K 
                Attributed Related to Net Operating Losses,                      
                Credits And Capital Losses (Details)                             
100: R84         Income Taxes - Additional Information (Details)     HTML     61K  
101: R85         Income Taxes - Reconciliation of Beginning and      HTML     58K  
                Ending Amount of Unrecognized Tax Benefits                       
                (Details)                                                        
102: R86         Long-Term Debt (Details)                            HTML     65K  
103: R87         Long-Term Debt - Scheduled Maturities of            HTML     61K  
                Outstanding Debt, Excluding Deferred Financing                   
                Costs (Details)                                                  
104: R88         Long-Term Debt - Additional Information (Details)   HTML     75K  
105: R89         Long-Term Debt - Revolving Credit Facility -        HTML     71K  
                Additional Information (Details)                                 
106: R90         Long-Term Debt - Term Loan A - Additional           HTML     55K  
                Information (Details)                                            
107: R91         Long-Term Debt - Term Loan A-1 - Additional         HTML     46K  
                Information (Details)                                            
108: R92         Long-Term Debt - 2024 Notes - Additional            HTML     54K  
                Information (Details)                                            
109: R93         Long-Term Debt - 2028 Notes - Additional            HTML     60K  
                Information (Details)                                            
110: R94         Long-Term Debt - Loss on Extinguishment of Debt -   HTML     53K  
                Additional Information (Details)                                 
111: R95         Long-Term Debt - Interest Rate Swap Agreements -    HTML     46K  
                Additional Information (Details)                                 
112: R96         Long-Term Debt - Fair Value - Additional            HTML     47K  
                Information (Details)                                            
113: R97         Long-Term Debt - Finance Lease Obligations and      HTML     45K  
                Other - Additional Information (Details)                         
114: R98         Long-Term Debt - Deferred Financing Costs -         HTML     46K  
                Additional Information (Details)                                 
115: R99         Stockholders' Equity - Additional Information       HTML     62K  
                (Details)                                                        
116: R100        Stockholders' Equity - Repurchase of Common Stock   HTML     48K  
                (Details)                                                        
117: R101        Earnings Per Share (Details)                        HTML     52K  
118: R102        Stock-Based Compensation - Additional Information   HTML     93K  
                (Details)                                                        
119: R103        Stock-Based Compensation - Summary of Total         HTML     46K  
                Compensation Expense (Details)                                   
120: R104        Stock-Based Compensation- Summary of Stock Option   HTML     84K  
                Activity (Details)                                               
121: R105        Stock-Based Compensation - Summary of Employee and  HTML     47K  
                Director Stock Option Highlights (Details)                       
122: R106        Stock-Based Compensation - Summary of Restricted    HTML     76K  
                Stock and Restricted Stock Unit Activity (Details)               
123: R107        Stock-Based Compensation - Summary of Employee and  HTML     47K  
                Director Restricted Stock and Restricted Stock                   
                Highlights (Details)                                             
124: R108        Stock-Based Compensation - Shareholder Return       HTML     52K  
                Market Condition and Assumptions (Details)                       
125: R109        Stock-Based Compensation - Summary of Performance   HTML     65K  
                Unit Activity (Details)                                          
126: R110        Stock-Based Compensation - Summary of Performance   HTML     47K  
                Unit Highlights (Details)                                        
127: R111        Accumulated Other Comprehensive Loss- Components    HTML     68K  
                of Accumulated Other Comprehensive Loss Net of Tax               
                Except for Foreign Currency Translation Adjustment               
                (Details)                                                        
128: R112        Employee Pension And Postretirement Benefit Plans   HTML     76K  
                - Additional Information (Details)                               
129: R113        Employee Pension and Postretirement Benefit Plans   HTML     55K  
                - Fair Value of Pension Plan Assets, by Asset                    
                Category (Details)                                               
130: R114        Employee Pension and Postretirement Benefit Plans   HTML    116K  
                - Summarized Information about Pension and                       
                Postretirement Benefit Plans (Details)                           
131: R115        Employee Pension and Postretirement Benefit Plans   HTML     48K  
                - Summary of Pension Benefit Plans (Details)                     
132: R116        Employee Pension and Postretirement Benefit Plans   HTML     52K  
                - Accumulated Benefit Obligation and Weighted                    
                Average Assumptions Used (Details)                               
133: R117        Employee Pension and Postretirement Benefit Plans   HTML     52K  
                - Key Actuarial Assumptions Used to Determine                    
                Postretirement Benefit Obligations (Details)                     
134: R118        Employee Pension and Postretirement Benefit Plans   HTML     70K  
                - Summary of Net Periodic Cost of Pension and                    
                Postretirement Benefit Plans (Details)                           
135: R119        Employee Pension and Postretirement Benefit Plans   HTML     59K  
                - Weighted Average Assumptions Used to Determine                 
                Pension Benefit Costs (Details)                                  
136: R120        Employee Pension and Postretirement Benefit Plans   HTML     59K  
                - Estimated Future Pension and Postretirement                    
                Benefit Payments (Details)                                       
137: R121        Employee Pension and Postretirement Benefit Plans   HTML     59K  
                - Multiemployer Pension Plans (Details)                          
138: R122        Other Operating Expense, Net (Details)              HTML     49K  
139: R123        Commitments and Contingencies (Details)             HTML     58K  
140: R124        Derivative Instruments - Additional Information     HTML     57K  
                (Details)                                                        
141: R125        Derivative Instruments - Derivative, Fair Value,    HTML     55K  
                and Location on Condensed Consolidated Balance                   
                Sheets (Details)                                                 
142: R126        Derivative Instruments - Gains and Losses on        HTML     71K  
                Derivative Contracts (Details)                                   
143: R127        Segment and Geographic Information and Major        HTML     59K  
                Customers - Additional Information (Details)                     
144: R128        Segment and Geographic Information and Major        HTML     87K  
                Customers - Financial Information Relating to                    
                Reportable Segments (Details)                                    
145: R129        Segment and Geographic Information and Major        HTML     73K  
                Customers - Disaggregation of Revenue (Details)                  
146: R130        Segment and Geographic Information and Major        HTML     49K  
                Customers - Long-Lived Assets by Geographic Region               
                (Details)                                                        
147: R131        Schedule II - Valuation and Qualifying Accounts -   HTML     50K  
                Deferred Tax Valuation Allowance (Details)                       
148: R9999       Uncategorized Items - ths-20211231.htm              HTML     43K  
151: XML         IDEA XML File -- Filing Summary                      XML    290K  
149: XML         XBRL Instance -- ths-20211231_htm                    XML   4.30M  
150: EXCEL       IDEA Workbook of Financial Reports                  XLSX    187K  
13: EX-101.CAL  XBRL Calculations -- ths-20211231_cal                XML    414K 
14: EX-101.DEF  XBRL Definitions -- ths-20211231_def                 XML   1.29M 
15: EX-101.LAB  XBRL Labels -- ths-20211231_lab                      XML   2.90M 
16: EX-101.PRE  XBRL Presentations -- ths-20211231_pre               XML   1.94M 
12: EX-101.SCH  XBRL Schema -- ths-20211231                          XSD    306K 
152: JSON        XBRL Instance as JSON Data -- MetaLinks              734±  1.10M  
153: ZIP         XBRL Zipped Folder -- 0001320695-22-000009-xbrl      Zip    884K

‘XML’   —   IDEA XML File — Filing Summary

This Document is an IDEA XML File.

                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<FilingSummary>
<Version> 3.22.0.1 </Version>
<ProcessingTime/>
<ReportFormat> html </ReportFormat>
<ContextCount> 432 </ContextCount>
<ElementCount> 716 </ElementCount>
<EntityCount> 1 </EntityCount>
<FootnotesReported> true </FootnotesReported>
<SegmentCount> 124 </SegmentCount>
<ScenarioCount> 0 </ScenarioCount>
<TuplesReported> false </TuplesReported>
<UnitCount> 9 </UnitCount>
<MyReports>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R1.htm </HtmlFileName>
<LongName> 000010001 - Document - Cover Page </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CoverPage </Role>
<ShortName> Cover Page </ShortName>
<MenuCategory> Cover </MenuCategory>
<Position> 1 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R2.htm </HtmlFileName>
<LongName> 000020002 - Document - Audit Information </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AuditInformation </Role>
<ShortName> Audit Information </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 2 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R3.htm </HtmlFileName>
<LongName> 100010003 - Statement - CONSOLIDATED BALANCE SHEETS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CONSOLIDATEDBALANCESHEETS </Role>
<ShortName> CONSOLIDATED BALANCE SHEETS </ShortName>
<MenuCategory> Uncategorized </MenuCategory>
<Position> 3 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R4.htm </HtmlFileName>
<LongName> 100020004 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CONSOLIDATEDBALANCESHEETSParenthetical </Role>
<ShortName> CONSOLIDATED BALANCE SHEETS (Parenthetical) </ShortName>
<MenuCategory> Cover </MenuCategory>
<Position> 4 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R5.htm </HtmlFileName>
<LongName> 100030005 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONS </Role>
<ShortName> CONSOLIDATED STATEMENTS OF OPERATIONS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 5 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R6.htm </HtmlFileName>
<LongName> 100040006 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSS </Role>
<ShortName> CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 6 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R7.htm </HtmlFileName>
<LongName> 100050007 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY </Role>
<ShortName> CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 7 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R8.htm </HtmlFileName>
<LongName> 100060008 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS </Role>
<ShortName> CONSOLIDATED STATEMENTS OF CASH FLOWS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 8 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R9.htm </HtmlFileName>
<LongName> 210011001 - Disclosure - Summary of Significant Accounting Policies </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPolicies </Role>
<ShortName> Summary of Significant Accounting Policies </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 9 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R10.htm </HtmlFileName>
<LongName> 210071002 - Disclosure - Recently Issued Accounting Pronouncements </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/RecentlyIssuedAccountingPronouncements </Role>
<ShortName> Recently Issued Accounting Pronouncements </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 10 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R11.htm </HtmlFileName>
<LongName> 210081003 - Disclosure - Growth, Reinvestment, and Restructuring Programs </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GrowthReinvestmentandRestructuringPrograms </Role>
<ShortName> Growth, Reinvestment, and Restructuring Programs </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 11 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R12.htm </HtmlFileName>
<LongName> 210131004 - Disclosure - Leases </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/Leases </Role>
<ShortName> Leases </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 12 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R13.htm </HtmlFileName>
<LongName> 210221005 - Disclosure - Receivables Sales Program </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/ReceivablesSalesProgram </Role>
<ShortName> Receivables Sales Program </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 13 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R14.htm </HtmlFileName>
<LongName> 210261006 - Disclosure - Inventories </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/Inventories </Role>
<ShortName> Inventories </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 14 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R15.htm </HtmlFileName>
<LongName> 210291007 - Disclosure - Acquisitions and Divestitures </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestitures </Role>
<ShortName> Acquisitions and Divestitures </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 15 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R16.htm </HtmlFileName>
<LongName> 210361008 - Disclosure - Property, Plant, and Equipment </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/PropertyPlantandEquipment </Role>
<ShortName> Property, Plant, and Equipment </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 16 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R17.htm </HtmlFileName>
<LongName> 210401009 - Disclosure - Goodwill and Intangible Assets </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GoodwillandIntangibleAssets </Role>
<ShortName> Goodwill and Intangible Assets </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 17 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R18.htm </HtmlFileName>
<LongName> 210461010 - Disclosure - Accrued Expenses </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AccruedExpenses </Role>
<ShortName> Accrued Expenses </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 18 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R19.htm </HtmlFileName>
<LongName> 210491011 - Disclosure - Income Taxes </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxes </Role>
<ShortName> Income Taxes </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 19 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R20.htm </HtmlFileName>
<LongName> 210581012 - Disclosure - Long-Term Debt </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebt </Role>
<ShortName> Long-Term Debt </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 20 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R21.htm </HtmlFileName>
<LongName> 210731013 - Disclosure - Stockholders' Equity </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockholdersEquity </Role>
<ShortName> Stockholders' Equity </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 21 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R22.htm </HtmlFileName>
<LongName> 210771014 - Disclosure - Earnings Per Share </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EarningsPerShare </Role>
<ShortName> Earnings Per Share </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 22 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R23.htm </HtmlFileName>
<LongName> 210801015 - Disclosure - Stock-Based Compensation </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensation </Role>
<ShortName> Stock-Based Compensation </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 23 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R24.htm </HtmlFileName>
<LongName> 210911016 - Disclosure - Accumulated Other Comprehensive Loss </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AccumulatedOtherComprehensiveLoss </Role>
<ShortName> Accumulated Other Comprehensive Loss </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 24 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R25.htm </HtmlFileName>
<LongName> 210941017 - Disclosure - Employee Pension and Postretirement Benefit Plans </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlans </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 25 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R26.htm </HtmlFileName>
<LongName> 211061018 - Disclosure - Other Operating Expense, Net </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/OtherOperatingExpenseNet </Role>
<ShortName> Other Operating Expense, Net </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 26 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R27.htm </HtmlFileName>
<LongName> 211091019 - Disclosure - Commitments and Contingencies </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CommitmentsandContingencies </Role>
<ShortName> Commitments and Contingencies </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 27 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R28.htm </HtmlFileName>
<LongName> 211111020 - Disclosure - Derivative Instruments </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/DerivativeInstruments </Role>
<ShortName> Derivative Instruments </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 28 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R29.htm </HtmlFileName>
<LongName> 211161021 - Disclosure - Segment and Geographic Information and Major Customers </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomers </Role>
<ShortName> Segment and Geographic Information and Major Customers </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 29 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R30.htm </HtmlFileName>
<LongName> 211221022 - Disclosure - Schedule II - Valuation and Qualifying Accounts </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/ScheduleIIValuationandQualifyingAccounts </Role>
<ShortName> Schedule II - Valuation and Qualifying Accounts </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 30 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R31.htm </HtmlFileName>
<LongName> 220022001 - Disclosure - Summary of Significant Accounting Policies (Policies) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPoliciesPolicies </Role>
<ShortName> Summary of Significant Accounting Policies (Policies) </ShortName>
<MenuCategory> Policies </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPolicies </ParentRole>
<Position> 31 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R32.htm </HtmlFileName>
<LongName> 230033001 - Disclosure - Summary of Significant Accounting Policies (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPoliciesTables </Role>
<ShortName> Summary of Significant Accounting Policies (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPolicies </ParentRole>
<Position> 32 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R33.htm </HtmlFileName>
<LongName> 230093002 - Disclosure - Growth, Reinvestment, and Restructuring Programs (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GrowthReinvestmentandRestructuringProgramsTables </Role>
<ShortName> Growth, Reinvestment, and Restructuring Programs (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/GrowthReinvestmentandRestructuringPrograms </ParentRole>
<Position> 33 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R34.htm </HtmlFileName>
<LongName> 230143003 - Disclosure - Leases (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesTables </Role>
<ShortName> Leases (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/Leases </ParentRole>
<Position> 34 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R35.htm </HtmlFileName>
<LongName> 230233004 - Disclosure - Receivable Sales Program (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/ReceivableSalesProgramTables </Role>
<ShortName> Receivable Sales Program (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<Position> 35 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R36.htm </HtmlFileName>
<LongName> 230273005 - Disclosure - Inventories (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/InventoriesTables </Role>
<ShortName> Inventories (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/Inventories </ParentRole>
<Position> 36 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R37.htm </HtmlFileName>
<LongName> 230303006 - Disclosure - Acquisitions and Divestitures (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestituresTables </Role>
<ShortName> Acquisitions and Divestitures (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/AcquisitionsandDivestitures </ParentRole>
<Position> 37 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R38.htm </HtmlFileName>
<LongName> 230373007 - Disclosure - Property, Plant, and Equipment (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/PropertyPlantandEquipmentTables </Role>
<ShortName> Property, Plant, and Equipment (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/PropertyPlantandEquipment </ParentRole>
<Position> 38 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R39.htm </HtmlFileName>
<LongName> 230413008 - Disclosure - Goodwill and Intangible Assets (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GoodwillandIntangibleAssetsTables </Role>
<ShortName> Goodwill and Intangible Assets (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/GoodwillandIntangibleAssets </ParentRole>
<Position> 39 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R40.htm </HtmlFileName>
<LongName> 230473009 - Disclosure - Accrued Expenses (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AccruedExpensesTables </Role>
<ShortName> Accrued Expenses (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/AccruedExpenses </ParentRole>
<Position> 40 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R41.htm </HtmlFileName>
<LongName> 230503010 - Disclosure - Income Taxes (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesTables </Role>
<ShortName> Income Taxes (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/IncomeTaxes </ParentRole>
<Position> 41 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R42.htm </HtmlFileName>
<LongName> 230593011 - Disclosure - Long-Term Debt (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtTables </Role>
<ShortName> Long-Term Debt (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/LongTermDebt </ParentRole>
<Position> 42 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R43.htm </HtmlFileName>
<LongName> 230743012 - Disclosure - Stockholders' Equity (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockholdersEquityTables </Role>
<ShortName> Stockholders' Equity (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/StockholdersEquity </ParentRole>
<Position> 43 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R44.htm </HtmlFileName>
<LongName> 230783013 - Disclosure - Earnings Per Share (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EarningsPerShareTables </Role>
<ShortName> Earnings Per Share (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/EarningsPerShare </ParentRole>
<Position> 44 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R45.htm </HtmlFileName>
<LongName> 230813014 - Disclosure - Stock-Based Compensation (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationTables </Role>
<ShortName> Stock-Based Compensation (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/StockBasedCompensation </ParentRole>
<Position> 45 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R46.htm </HtmlFileName>
<LongName> 230923015 - Disclosure - Accumulated Other Comprehensive Loss (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AccumulatedOtherComprehensiveLossTables </Role>
<ShortName> Accumulated Other Comprehensive Loss (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/AccumulatedOtherComprehensiveLoss </ParentRole>
<Position> 46 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R47.htm </HtmlFileName>
<LongName> 230953016 - Disclosure - Employee Pension and Postretirement Benefit Plans (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansTables </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlans </ParentRole>
<Position> 47 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R48.htm </HtmlFileName>
<LongName> 231073017 - Disclosure - Other Operating Expense, Net (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/OtherOperatingExpenseNetTables </Role>
<ShortName> Other Operating Expense, Net (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/OtherOperatingExpenseNet </ParentRole>
<Position> 48 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R49.htm </HtmlFileName>
<LongName> 231123018 - Disclosure - Derivative Instruments (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/DerivativeInstrumentsTables </Role>
<ShortName> Derivative Instruments (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/DerivativeInstruments </ParentRole>
<Position> 49 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R50.htm </HtmlFileName>
<LongName> 231173019 - Disclosure - Segment and Geographic Information and Major Customers (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomersTables </Role>
<ShortName> Segment and Geographic Information and Major Customers (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomers </ParentRole>
<Position> 50 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R51.htm </HtmlFileName>
<LongName> 240044001 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPoliciesAdditionalInformationDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 51 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R52.htm </HtmlFileName>
<LongName> 240054002 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPoliciesEstimatedUsefulLivesofAssetsDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 52 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R53.htm </HtmlFileName>
<LongName> 240064003 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SummaryofSignificantAccountingPoliciesEstimatedUsefulLivesofIntangibleAssetsDetails </Role>
<ShortName> Summary of Significant Accounting Policies - Estimated Useful Lives of Intangible Assets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 53 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R54.htm </HtmlFileName>
<LongName> 240104004 - Disclosure - Growth, Reinvestment, and Restructuring Programs - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GrowthReinvestmentandRestructuringProgramsAdditionalInformationDetails </Role>
<ShortName> Growth, Reinvestment, and Restructuring Programs - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 54 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R55.htm </HtmlFileName>
<LongName> 240114005 - Disclosure - Growth, Reinvestment, and Restructuring Programs - Aggregate Expenses Incurred Associated with Facility Closure (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GrowthReinvestmentandRestructuringProgramsAggregateExpensesIncurredAssociatedwithFacilityClosureDetails </Role>
<ShortName> Growth, Reinvestment, and Restructuring Programs - Aggregate Expenses Incurred Associated with Facility Closure (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 55 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R56.htm </HtmlFileName>
<LongName> 240124006 - Disclosure - Growth, Reinvestment, and Restructuring Programs - Reconciliation of Liabilities (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GrowthReinvestmentandRestructuringProgramsReconciliationofLiabilitiesDetails </Role>
<ShortName> Growth, Reinvestment, and Restructuring Programs - Reconciliation of Liabilities (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 56 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R57.htm </HtmlFileName>
<LongName> 240154007 - Disclosure - Leases - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesAdditionalInformationDetails </Role>
<ShortName> Leases - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 57 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R58.htm </HtmlFileName>
<LongName> 240164008 - Disclosure - Leases - Supplemental Balance Sheet Information Related to Leases (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesSupplementalBalanceSheetInformationRelatedtoLeasesDetails </Role>
<ShortName> Leases - Supplemental Balance Sheet Information Related to Leases (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 58 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R59.htm </HtmlFileName>
<LongName> 240174009 - Disclosure - Leases - Weighted-average Discount Rates for Operating and Finance Leases (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesWeightedaverageDiscountRatesforOperatingandFinanceLeasesDetails </Role>
<ShortName> Leases - Weighted-average Discount Rates for Operating and Finance Leases (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 59 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R60.htm </HtmlFileName>
<LongName> 240184010 - Disclosure - Leases - Weighted-average Remaining Lease Term of Operating and Finance Leases (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesWeightedaverageRemainingLeaseTermofOperatingandFinanceLeasesDetails </Role>
<ShortName> Leases - Weighted-average Remaining Lease Term of Operating and Finance Leases (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 60 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R61.htm </HtmlFileName>
<LongName> 240194011 - Disclosure - Leases - Components of Lease Expense (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesComponentsofLeaseExpenseDetails </Role>
<ShortName> Leases - Components of Lease Expense (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 61 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R62.htm </HtmlFileName>
<LongName> 240204012 - Disclosure - Leases - Operating and Finance Lease Liability (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesOperatingandFinanceLeaseLiabilityDetails </Role>
<ShortName> Leases - Operating and Finance Lease Liability (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 62 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R63.htm </HtmlFileName>
<LongName> 240214013 - Disclosure - Leases - Other Information Relating to Leases (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LeasesOtherInformationRelatingtoLeasesDetails </Role>
<ShortName> Leases - Other Information Relating to Leases (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 63 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R64.htm </HtmlFileName>
<LongName> 240244014 - Disclosure - Receivables Sales Program - Additional Information (Detail) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/ReceivablesSalesProgramAdditionalInformationDetail </Role>
<ShortName> Receivables Sales Program - Additional Information (Detail) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 64 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R65.htm </HtmlFileName>
<LongName> 240254015 - Disclosure - Receivables Sales Program - Accounts Receivable Sold the Receivable Sales Program (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/ReceivablesSalesProgramAccountsReceivableSoldtheReceivableSalesProgramDetails </Role>
<ShortName> Receivables Sales Program - Accounts Receivable Sold the Receivable Sales Program (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 65 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R66.htm </HtmlFileName>
<LongName> 240284016 - Disclosure - Inventories (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/InventoriesDetails </Role>
<ShortName> Inventories (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/InventoriesTables </ParentRole>
<Position> 66 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R67.htm </HtmlFileName>
<LongName> 240314017 - Disclosure - Acquisitions and Divestitures - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestituresAdditionalInformationDetails </Role>
<ShortName> Acquisitions and Divestitures - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 67 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R68.htm </HtmlFileName>
<LongName> 240324018 - Disclosure - Acquisitions and Divestitures - Purchase Price Allocation to Net Tangible and Intangible Assets Acquired and Liabilities Assumed (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestituresPurchasePriceAllocationtoNetTangibleandIntangibleAssetsAcquiredandLiabilitiesAssumedDetails </Role>
<ShortName> Acquisitions and Divestitures - Purchase Price Allocation to Net Tangible and Intangible Assets Acquired and Liabilities Assumed (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 68 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R69.htm </HtmlFileName>
<LongName> 240334019 - Disclosure - Acquisitions and Divestitures - Pro Forma Information (Detail) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestituresProFormaInformationDetail </Role>
<ShortName> Acquisitions and Divestitures - Pro Forma Information (Detail) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 69 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R70.htm </HtmlFileName>
<LongName> 240344020 - Disclosure - Acquisitions and Divestitures - Results of Discontinued Operations on Income Statement (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestituresResultsofDiscontinuedOperationsonIncomeStatementDetails </Role>
<ShortName> Acquisitions and Divestitures - Results of Discontinued Operations on Income Statement (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 70 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R71.htm </HtmlFileName>
<LongName> 240354021 - Disclosure - Acquisitions and Divestitures - Results of Discontinued Operations on Balance Sheet (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AcquisitionsandDivestituresResultsofDiscontinuedOperationsonBalanceSheetDetails </Role>
<ShortName> Acquisitions and Divestitures - Results of Discontinued Operations on Balance Sheet (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 71 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R72.htm </HtmlFileName>
<LongName> 240384022 - Disclosure - Property, Plant, and Equipment - (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/PropertyPlantandEquipmentDetails </Role>
<ShortName> Property, Plant, and Equipment - (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/PropertyPlantandEquipmentTables </ParentRole>
<Position> 72 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R73.htm </HtmlFileName>
<LongName> 240394023 - Disclosure - Property, Plant, and Equipment - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/PropertyPlantandEquipmentAdditionalInformationDetails </Role>
<ShortName> Property, Plant, and Equipment - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 73 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R74.htm </HtmlFileName>
<LongName> 240424024 - Disclosure - Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GoodwillandIntangibleAssetsChangesinCarryingAmountofGoodwillDetails </Role>
<ShortName> Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 74 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R75.htm </HtmlFileName>
<LongName> 240434025 - Disclosure - Goodwill and Intangible Assets - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GoodwillandIntangibleAssetsAdditionalInformationDetails </Role>
<ShortName> Goodwill and Intangible Assets - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 75 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R76.htm </HtmlFileName>
<LongName> 240444026 - Disclosure - Goodwill and Intangible Assets - Gross Carrying Amounts and Accumulated Amortization of Intangible Assets, with Finite Lives (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GoodwillandIntangibleAssetsGrossCarryingAmountsandAccumulatedAmortizationofIntangibleAssetswithFiniteLivesDetails </Role>
<ShortName> Goodwill and Intangible Assets - Gross Carrying Amounts and Accumulated Amortization of Intangible Assets, with Finite Lives (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 76 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R77.htm </HtmlFileName>
<LongName> 240454027 - Disclosure - Goodwill and Intangible Assets - Estimated Amortization Expense on Intangible Assets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/GoodwillandIntangibleAssetsEstimatedAmortizationExpenseonIntangibleAssetsDetails </Role>
<ShortName> Goodwill and Intangible Assets - Estimated Amortization Expense on Intangible Assets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 77 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R78.htm </HtmlFileName>
<LongName> 240484028 - Disclosure - Accrued Expenses (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AccruedExpensesDetails </Role>
<ShortName> Accrued Expenses (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/AccruedExpensesTables </ParentRole>
<Position> 78 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R79.htm </HtmlFileName>
<LongName> 240514029 - Disclosure - Income Taxes - Components of Loss Before Income Taxes (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesComponentsofLossBeforeIncomeTaxesDetails </Role>
<ShortName> Income Taxes - Components of Loss Before Income Taxes (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 79 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R80.htm </HtmlFileName>
<LongName> 240524030 - Disclosure - Income Taxes - Components of Provision for Income Taxes (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesComponentsofProvisionforIncomeTaxesDetails </Role>
<ShortName> Income Taxes - Components of Provision for Income Taxes (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 80 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R81.htm </HtmlFileName>
<LongName> 240534031 - Disclosure - Income Taxes - Reconciliation of Income Tax Expense Computed at U.S. Federal Statutory Tax Rate to Income Tax Expense (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesReconciliationofIncomeTaxExpenseComputedatUSFederalStatutoryTaxRatetoIncomeTaxExpenseDetails </Role>
<ShortName> Income Taxes - Reconciliation of Income Tax Expense Computed at U.S. Federal Statutory Tax Rate to Income Tax Expense (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 81 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R82.htm </HtmlFileName>
<LongName> 240544032 - Disclosure - Income Taxes - Tax Effects of Temporary Differences Giving Rise to Deferred Income Tax Assets and Liabilities (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesTaxEffectsofTemporaryDifferencesGivingRisetoDeferredIncomeTaxAssetsandLiabilitiesDetails </Role>
<ShortName> Income Taxes - Tax Effects of Temporary Differences Giving Rise to Deferred Income Tax Assets and Liabilities (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 82 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R83.htm </HtmlFileName>
<LongName> 240554033 - Disclosure - Income Taxes - Income Taxes - Details of Tax Attributed Related to Net Operating Losses, Credits And Capital Losses (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesIncomeTaxesDetailsofTaxAttributedRelatedtoNetOperatingLossesCreditsAndCapitalLossesDetails </Role>
<ShortName> Income Taxes - Income Taxes - Details of Tax Attributed Related to Net Operating Losses, Credits And Capital Losses (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 83 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R84.htm </HtmlFileName>
<LongName> 240564034 - Disclosure - Income Taxes - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesAdditionalInformationDetails </Role>
<ShortName> Income Taxes - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 84 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R85.htm </HtmlFileName>
<LongName> 240574035 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/IncomeTaxesReconciliationofBeginningandEndingAmountofUnrecognizedTaxBenefitsDetails </Role>
<ShortName> Income Taxes - Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 85 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R86.htm </HtmlFileName>
<LongName> 240604036 - Disclosure - Long-Term Debt (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtDetails </Role>
<ShortName> Long-Term Debt (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/LongTermDebtTables </ParentRole>
<Position> 86 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R87.htm </HtmlFileName>
<LongName> 240614037 - Disclosure - Long-Term Debt - Scheduled Maturities of Outstanding Debt, Excluding Deferred Financing Costs (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtScheduledMaturitiesofOutstandingDebtExcludingDeferredFinancingCostsDetails </Role>
<ShortName> Long-Term Debt - Scheduled Maturities of Outstanding Debt, Excluding Deferred Financing Costs (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 87 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R88.htm </HtmlFileName>
<LongName> 240624038 - Disclosure - Long-Term Debt - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 88 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R89.htm </HtmlFileName>
<LongName> 240634039 - Disclosure - Long-Term Debt - Revolving Credit Facility - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtRevolvingCreditFacilityAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Revolving Credit Facility - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 89 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R90.htm </HtmlFileName>
<LongName> 240644040 - Disclosure - Long-Term Debt - Term Loan A - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtTermLoanAAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Term Loan A - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 90 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R91.htm </HtmlFileName>
<LongName> 240654041 - Disclosure - Long-Term Debt - Term Loan A-1 - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtTermLoanA1AdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Term Loan A-1 - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 91 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R92.htm </HtmlFileName>
<LongName> 240664042 - Disclosure - Long-Term Debt - 2024 Notes - Additional Information (Details) </LongName>
<ReportType> Notes </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebt2024NotesAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - 2024 Notes - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 92 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R93.htm </HtmlFileName>
<LongName> 240674043 - Disclosure - Long-Term Debt - 2028 Notes - Additional Information (Details) </LongName>
<ReportType> Notes </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebt2028NotesAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - 2028 Notes - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 93 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R94.htm </HtmlFileName>
<LongName> 240684044 - Disclosure - Long-Term Debt - Loss on Extinguishment of Debt - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtLossonExtinguishmentofDebtAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Loss on Extinguishment of Debt - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 94 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R95.htm </HtmlFileName>
<LongName> 240694045 - Disclosure - Long-Term Debt - Interest Rate Swap Agreements - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtInterestRateSwapAgreementsAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Interest Rate Swap Agreements - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 95 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R96.htm </HtmlFileName>
<LongName> 240704046 - Disclosure - Long-Term Debt - Fair Value - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtFairValueAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Fair Value - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 96 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R97.htm </HtmlFileName>
<LongName> 240714047 - Disclosure - Long-Term Debt - Finance Lease Obligations and Other - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtFinanceLeaseObligationsandOtherAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Finance Lease Obligations and Other - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 97 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R98.htm </HtmlFileName>
<LongName> 240724048 - Disclosure - Long-Term Debt - Deferred Financing Costs - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/LongTermDebtDeferredFinancingCostsAdditionalInformationDetails </Role>
<ShortName> Long-Term Debt - Deferred Financing Costs - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 98 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R99.htm </HtmlFileName>
<LongName> 240754049 - Disclosure - Stockholders' Equity - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockholdersEquityAdditionalInformationDetails </Role>
<ShortName> Stockholders' Equity - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 99 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R100.htm </HtmlFileName>
<LongName> 240764050 - Disclosure - Stockholders' Equity - Repurchase of Common Stock (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockholdersEquityRepurchaseofCommonStockDetails </Role>
<ShortName> Stockholders' Equity - Repurchase of Common Stock (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 100 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R101.htm </HtmlFileName>
<LongName> 240794051 - Disclosure - Earnings Per Share (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EarningsPerShareDetails </Role>
<ShortName> Earnings Per Share (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/EarningsPerShareTables </ParentRole>
<Position> 101 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R102.htm </HtmlFileName>
<LongName> 240824052 - Disclosure - Stock-Based Compensation - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationAdditionalInformationDetails </Role>
<ShortName> Stock-Based Compensation - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 102 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R103.htm </HtmlFileName>
<LongName> 240834053 - Disclosure - Stock-Based Compensation - Summary of Total Compensation Expense (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofTotalCompensationExpenseDetails </Role>
<ShortName> Stock-Based Compensation - Summary of Total Compensation Expense (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 103 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R104.htm </HtmlFileName>
<LongName> 240844054 - Disclosure - Stock-Based Compensation- Summary of Stock Option Activity (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofStockOptionActivityDetails </Role>
<ShortName> Stock-Based Compensation- Summary of Stock Option Activity (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 104 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R105.htm </HtmlFileName>
<LongName> 240854055 - Disclosure - Stock-Based Compensation - Summary of Employee and Director Stock Option Highlights (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofEmployeeandDirectorStockOptionHighlightsDetails </Role>
<ShortName> Stock-Based Compensation - Summary of Employee and Director Stock Option Highlights (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 105 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R106.htm </HtmlFileName>
<LongName> 240864056 - Disclosure - Stock-Based Compensation - Summary of Restricted Stock and Restricted Stock Unit Activity (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofRestrictedStockandRestrictedStockUnitActivityDetails </Role>
<ShortName> Stock-Based Compensation - Summary of Restricted Stock and Restricted Stock Unit Activity (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 106 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R107.htm </HtmlFileName>
<LongName> 240874057 - Disclosure - Stock-Based Compensation - Summary of Employee and Director Restricted Stock and Restricted Stock Highlights (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofEmployeeandDirectorRestrictedStockandRestrictedStockHighlightsDetails </Role>
<ShortName> Stock-Based Compensation - Summary of Employee and Director Restricted Stock and Restricted Stock Highlights (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 107 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R108.htm </HtmlFileName>
<LongName> 240884058 - Disclosure - Stock-Based Compensation - Shareholder Return Market Condition and Assumptions (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationShareholderReturnMarketConditionandAssumptionsDetails </Role>
<ShortName> Stock-Based Compensation - Shareholder Return Market Condition and Assumptions (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 108 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R109.htm </HtmlFileName>
<LongName> 240894059 - Disclosure - Stock-Based Compensation - Summary of Performance Unit Activity (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofPerformanceUnitActivityDetails </Role>
<ShortName> Stock-Based Compensation - Summary of Performance Unit Activity (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 109 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R110.htm </HtmlFileName>
<LongName> 240904060 - Disclosure - Stock-Based Compensation - Summary of Performance Unit Highlights (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/StockBasedCompensationSummaryofPerformanceUnitHighlightsDetails </Role>
<ShortName> Stock-Based Compensation - Summary of Performance Unit Highlights (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 110 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R111.htm </HtmlFileName>
<LongName> 240934061 - Disclosure - Accumulated Other Comprehensive Loss- Components of Accumulated Other Comprehensive Loss Net of Tax Except for Foreign Currency Translation Adjustment (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveLossNetofTaxExceptforForeignCurrencyTranslationAdjustmentDetails </Role>
<ShortName> Accumulated Other Comprehensive Loss- Components of Accumulated Other Comprehensive Loss Net of Tax Except for Foreign Currency Translation Adjustment (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 111 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R112.htm </HtmlFileName>
<LongName> 240964062 - Disclosure - Employee Pension And Postretirement Benefit Plans - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionAndPostretirementBenefitPlansAdditionalInformationDetails </Role>
<ShortName> Employee Pension And Postretirement Benefit Plans - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 112 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R113.htm </HtmlFileName>
<LongName> 240974063 - Disclosure - Employee Pension and Postretirement Benefit Plans - Fair Value of Pension Plan Assets, by Asset Category (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansFairValueofPensionPlanAssetsbyAssetCategoryDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Fair Value of Pension Plan Assets, by Asset Category (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 113 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R114.htm </HtmlFileName>
<LongName> 240984064 - Disclosure - Employee Pension and Postretirement Benefit Plans - Summarized Information about Pension and Postretirement Benefit Plans (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansSummarizedInformationaboutPensionandPostretirementBenefitPlansDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Summarized Information about Pension and Postretirement Benefit Plans (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 114 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R115.htm </HtmlFileName>
<LongName> 240994065 - Disclosure - Employee Pension and Postretirement Benefit Plans - Summary of Pension Benefit Plans (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansSummaryofPensionBenefitPlansDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Summary of Pension Benefit Plans (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 115 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R116.htm </HtmlFileName>
<LongName> 241004066 - Disclosure - Employee Pension and Postretirement Benefit Plans - Accumulated Benefit Obligation and Weighted Average Assumptions Used (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansAccumulatedBenefitObligationandWeightedAverageAssumptionsUsedDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Accumulated Benefit Obligation and Weighted Average Assumptions Used (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 116 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R117.htm </HtmlFileName>
<LongName> 241014067 - Disclosure - Employee Pension and Postretirement Benefit Plans - Key Actuarial Assumptions Used to Determine Postretirement Benefit Obligations (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansKeyActuarialAssumptionsUsedtoDeterminePostretirementBenefitObligationsDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Key Actuarial Assumptions Used to Determine Postretirement Benefit Obligations (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 117 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R118.htm </HtmlFileName>
<LongName> 241024068 - Disclosure - Employee Pension and Postretirement Benefit Plans - Summary of Net Periodic Cost of Pension and Postretirement Benefit Plans (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansSummaryofNetPeriodicCostofPensionandPostretirementBenefitPlansDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Summary of Net Periodic Cost of Pension and Postretirement Benefit Plans (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 118 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R119.htm </HtmlFileName>
<LongName> 241034069 - Disclosure - Employee Pension and Postretirement Benefit Plans - Weighted Average Assumptions Used to Determine Pension Benefit Costs (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansWeightedAverageAssumptionsUsedtoDeterminePensionBenefitCostsDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Weighted Average Assumptions Used to Determine Pension Benefit Costs (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 119 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R120.htm </HtmlFileName>
<LongName> 241044070 - Disclosure - Employee Pension and Postretirement Benefit Plans - Estimated Future Pension and Postretirement Benefit Payments (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansEstimatedFuturePensionandPostretirementBenefitPaymentsDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Estimated Future Pension and Postretirement Benefit Payments (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 120 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R121.htm </HtmlFileName>
<LongName> 241054071 - Disclosure - Employee Pension and Postretirement Benefit Plans - Multiemployer Pension Plans (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/EmployeePensionandPostretirementBenefitPlansMultiemployerPensionPlansDetails </Role>
<ShortName> Employee Pension and Postretirement Benefit Plans - Multiemployer Pension Plans (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 121 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R122.htm </HtmlFileName>
<LongName> 241084072 - Disclosure - Other Operating Expense, Net (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/OtherOperatingExpenseNetDetails </Role>
<ShortName> Other Operating Expense, Net (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/OtherOperatingExpenseNetTables </ParentRole>
<Position> 122 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R123.htm </HtmlFileName>
<LongName> 241104073 - Disclosure - Commitments and Contingencies (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/CommitmentsandContingenciesDetails </Role>
<ShortName> Commitments and Contingencies (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.treehousefoods.com/role/CommitmentsandContingencies </ParentRole>
<Position> 123 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R124.htm </HtmlFileName>
<LongName> 241134074 - Disclosure - Derivative Instruments - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/DerivativeInstrumentsAdditionalInformationDetails </Role>
<ShortName> Derivative Instruments - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 124 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R125.htm </HtmlFileName>
<LongName> 241144075 - Disclosure - Derivative Instruments - Derivative, Fair Value, and Location on Condensed Consolidated Balance Sheets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/DerivativeInstrumentsDerivativeFairValueandLocationonCondensedConsolidatedBalanceSheetsDetails </Role>
<ShortName> Derivative Instruments - Derivative, Fair Value, and Location on Condensed Consolidated Balance Sheets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 125 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R126.htm </HtmlFileName>
<LongName> 241154076 - Disclosure - Derivative Instruments - Gains and Losses on Derivative Contracts (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/DerivativeInstrumentsGainsandLossesonDerivativeContractsDetails </Role>
<ShortName> Derivative Instruments - Gains and Losses on Derivative Contracts (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 126 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R127.htm </HtmlFileName>
<LongName> 241184077 - Disclosure - Segment and Geographic Information and Major Customers - Additional Information (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomersAdditionalInformationDetails </Role>
<ShortName> Segment and Geographic Information and Major Customers - Additional Information (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 127 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R128.htm </HtmlFileName>
<LongName> 241194078 - Disclosure - Segment and Geographic Information and Major Customers - Financial Information Relating to Reportable Segments (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomersFinancialInformationRelatingtoReportableSegmentsDetails </Role>
<ShortName> Segment and Geographic Information and Major Customers - Financial Information Relating to Reportable Segments (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 128 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R129.htm </HtmlFileName>
<LongName> 241204079 - Disclosure - Segment and Geographic Information and Major Customers - Disaggregation of Revenue (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomersDisaggregationofRevenueDetails </Role>
<ShortName> Segment and Geographic Information and Major Customers - Disaggregation of Revenue (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 129 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R130.htm </HtmlFileName>
<LongName> 241214080 - Disclosure - Segment and Geographic Information and Major Customers - Long-Lived Assets by Geographic Region (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/SegmentandGeographicInformationandMajorCustomersLongLivedAssetsbyGeographicRegionDetails </Role>
<ShortName> Segment and Geographic Information and Major Customers - Long-Lived Assets by Geographic Region (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 130 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R131.htm </HtmlFileName>
<LongName> 241234081 - Disclosure - Schedule II - Valuation and Qualifying Accounts - Deferred Tax Valuation Allowance (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.treehousefoods.com/role/ScheduleIIValuationandQualifyingAccountsDeferredTaxValuationAllowanceDetails </Role>
<ShortName> Schedule II - Valuation and Qualifying Accounts - Deferred Tax Valuation Allowance (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 131 </Position>
</Report>
<Report instance="ths-20211231.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R9999.htm </HtmlFileName>
<LongName> Uncategorized Items - ths-20211231.htm </LongName>
<ReportType> Sheet </ReportType>
<Role> http://xbrl.sec.gov/role/uncategorizedFacts </Role>
<ShortName> Uncategorized Items - ths-20211231.htm </ShortName>
<MenuCategory> Cover </MenuCategory>
<Position> 132 </Position>
</Report>
<Report>
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<LongName> All Reports </LongName>
<ReportType> Book </ReportType>
<ShortName> All Reports </ShortName>
</Report>
</MyReports>
<InputFiles>
<File doctype="10-K" original="ths-20211231.htm"> ths-20211231.htm </File>
<File> a202110-kexhibit1027.htm </File>
<File> a202110-kexhibit1028.htm </File>
<File> a202110-kexhibit1029.htm </File>
<File> a202110-kexhibit211.htm </File>
<File> a202110-kexhibit22.htm </File>
<File> a202110-kexhibit231.htm </File>
<File> a202110-kexhibit311.htm </File>
<File> a202110-kexhibit312.htm </File>
<File> a202110-kexhibit321.htm </File>
<File> a202110-kexhibit322.htm </File>
<File> ths-20211231.xsd </File>
<File> ths-20211231_cal.xml </File>
<File> ths-20211231_def.xml </File>
<File> ths-20211231_lab.xml </File>
<File> ths-20211231_pre.xml </File>
</InputFiles>
<SupplementalFiles>
<File> ths-20211231_g1.jpg </File>
<File> ths-20211231_g2.jpg </File>
</SupplementalFiles>
<BaseTaxonomies>
<BaseTaxonomy items="1"> http://fasb.org/srt/2021-01-31 </BaseTaxonomy>
<BaseTaxonomy items="1583"> http://fasb.org/us-gaap/2021-01-31 </BaseTaxonomy>
<BaseTaxonomy items="38"> http://xbrl.sec.gov/dei/2021q4 </BaseTaxonomy>
</BaseTaxonomies>
<HasPresentationLinkbase> true </HasPresentationLinkbase>
<HasCalculationLinkbase> true </HasCalculationLinkbase>
</FilingSummary>

3 Subsequent Filings that Reference this Filing

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 2/16/24  TreeHouse Foods, Inc.             10-K       12/31/23  149:16M
 2/13/23  TreeHouse Foods, Inc.             10-K       12/31/22  154:16M
 5/09/22  TreeHouse Foods, Inc.             10-Q        3/31/22   83:7.4M

26 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 6/29/21  TreeHouse Foods, Inc.             8-K:5,9     6/28/21   13:382K
 5/06/21  TreeHouse Foods, Inc.             10-Q        3/31/21   87:8.4M
 4/01/21  TreeHouse Foods, Inc.             8-K:1,9     3/26/21   11:1.5M                                   Donnelley … Solutions/FA
 2/11/21  TreeHouse Foods, Inc.             10-K       12/31/20  158:18M
 1/04/21  TreeHouse Foods, Inc.             8-K:5,9     1/04/21   13:261K
 9/09/20  TreeHouse Foods, Inc.             8-K:1,2,9   9/09/20   11:848K                                   Donnelley … Solutions/FA
 2/13/20  TreeHouse Foods, Inc.             10-K       12/31/19  161:25M
 2/28/19  TreeHouse Foods, Inc.             DEF 14A     4/25/19    1:3.3M
 2/21/19  TreeHouse Foods, Inc.             8-K:5,9     2/19/19    2:61K                                    Donnelley … Solutions/FA
 2/14/19  TreeHouse Foods, Inc.             10-K       12/31/18  154:22M
 6/11/18  TreeHouse Foods, Inc.             8-K:1,9     6/11/18    3:218K                                   Donnelley … Solutions/FA
 3/05/18  TreeHouse Foods, Inc.             8-K:5,9     3/02/18    4:139K                                   Donnelley … Solutions/FA
 2/21/18  TreeHouse Foods, Inc.             8-K:5,9     2/20/18    4:236K                                   Donnelley … Solutions/FA
12/05/17  TreeHouse Foods, Inc.             8-K:1,9    12/01/17    3:913K                                   Donnelley … Solutions/FA
 5/04/17  TreeHouse Foods, Inc.             10-Q        3/31/17  125:9M                                     Donnelley … Solutions/FA
 5/05/16  TreeHouse Foods, Inc.             10-Q        3/31/16  124:8.5M                                   Donnelley … Solutions/FA
 2/01/16  TreeHouse Foods, Inc.             8-K:1,2,9   1/29/16    5:1.6M                                   Donnelley … Solutions/FA
 8/06/15  TreeHouse Foods, Inc.             10-Q        6/30/15  118:8.9M                                   Donnelley … Solutions/FA
 3/02/15  TreeHouse Foods, Inc.             DEF 14A     4/23/15    1:1.9M                                   Donnelley … Solutions/FA
 2/24/14  TreeHouse Foods, Inc.             8-K:5,9     2/21/14    7:341K
 2/21/12  TreeHouse Foods, Inc.             10-K       12/31/11  142:16M                                    Donnelley … Solutions/FA
 4/28/11  TreeHouse Foods, Inc.             8-K:5,9     4/28/11    3:291K
 3/03/10  TreeHouse Foods, Inc.             8-K:1,2,9   3/02/10    5:896K                                   Donnelley … Solutions/FA
 8/06/09  TreeHouse Foods, Inc.             10-Q        6/30/09   13:1.5M
 8/03/05  TreeHouse Foods, Inc.             8-K:1,9     8/01/05    2:61K                                    Bowne - DC/FA
 6/09/05  TreeHouse Foods, Inc.             10-12B/A¶             17:2.3M                                   Bowne - DC/FA
↑Top
Filing Submission 0001320695-22-000009   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)
Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
About — Privacy — Redactions — Help — Sat., Apr. 27, 6:56:22.3pm ET