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Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Feb. 23, 2024
Feb. 24, 2023
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2023    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Registrant Name JONES FINANCIAL COMPANIES LLLP    
Entity Central Index Key 0000815917    
Document Financial Statement Error Correction [Flag] false    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Filer Category Non-accelerated Filer    
Entity Shell Company false    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity File Number 0-16633    
Entity Tax Identification Number 43-1450818    
Entity Address, Address Line One 12555 Manchester Road    
Entity Address, City or Town Des Peres    
Entity Address, State or Province MO    
Entity Address, Postal Zip Code 63131    
City Area Code 314    
Local Phone Number 515-2000    
Entity Incorporation, State or Country Code MO    
Entity Limited Partnership Interests Outstanding   1,751,993  
Entity Interactive Data Current Yes    
Entity Public Float     $ 0
ICFR Auditor Attestation Flag true    
Document Annual Report true    
Document Transition Report false    
Documents Incorporated by Reference

None

    
Auditor Firm ID 238    
Auditor Name PricewaterhouseCoopers, LLP    
Auditor Location St. Louis, Missouri