v3.26.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2025
Feb. 28, 2026
Jun. 30, 2025
Document information      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Document Period End Date Dec. 31, 2025    
Securities Act File Number 0-50316    
Entity Registrant Name GRANT PARK FUTURES FUND LIMITED PARTNERSHIP    
Entity Incorporation, State or Country Code IL    
Entity Tax Identification Number 36-3596839    
Entity Address, Address Line One 566 West Adams Street    
Entity Address, Address Line Two Suite 300    
Entity Address, City or Town Chicago    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60661    
City Area Code 312    
Local Phone Number 756-4450    
Title of 12(b) Security Not applicable    
No Trading Symbol Flag true    
Security Exchange Name NONE    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 0
Auditor Name COHEN & COMPANY, LTD.    
Auditor Firm ID 925    
Auditor Location Milwaukee, Wisconsin    
Current Fiscal Year End Date --12-31    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000845698    
Amendment Flag false    
Class A      
Document information      
Title of 12(g) Security Class A Limited Partnership Units    
Entity Common Stock, Shares Outstanding   3,543.11  
Class B      
Document information      
Title of 12(g) Security Class B Limited Partnership Units    
Entity Common Stock, Shares Outstanding   11,762.4  
Legacy 1 Class      
Document information      
Title of 12(g) Security Legacy 1 Class Units    
Entity Common Stock, Shares Outstanding   102.66  
Legacy 2 Class      
Document information      
Title of 12(g) Security Legacy 2 Class Units    
Entity Common Stock, Shares Outstanding   274.18  
Global 1 Class      
Document information      
Title of 12(g) Security Global Alternative Markets 1 Class Units    
Entity Common Stock, Shares Outstanding   7,111.65  
Global 2 Class      
Document information      
Title of 12(g) Security Global Alternative Markets 2 Class Units    
Entity Common Stock, Shares Outstanding   184.28