| Cover | Dec. 18, 2023 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 18, 2023 |
| Entity Registrant Name | PUBLIX SUPER MARKETS, INC. |
| Entity Incorporation, State or Country Code | FL |
| Entity File Number | 000-00981 |
| Entity Tax Identification Number | 59-0324412 |
| Entity Address, Address Line One | 3300 Publix Corporate Parkway |
| Entity Address, City or Town | Lakeland |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33811 |
| City Area Code | (863) |
| Local Phone Number | 688-1188 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000081061 |
| Current Fiscal Year End Date | --12-30 |
