| Document and Entity Information | Jan. 08, 2024 |
| Cover [Abstract] | |
| Entity Registrant Name | JONES FINANCIAL COMPANIES LLLP |
| Amendment Flag | false |
| Entity Central Index Key | 0000815917 |
| Document Type | 8-K |
| Document Period End Date | Jan. 08, 2024 |
| Entity File Number | 0-16633 |
| Entity Incorporation State Country Code | MO |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
