Document and Entity Information - USD ($)	12 Months Ended
	Dec. 30, 2023	Feb. 06, 2024	Jun. 30, 2023
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag - Incentive Based Compensation	false
Document Annual Report	true
Document Period End Date	Dec. 30, 2023
Current Fiscal Year End Date	--12-30
Document Fiscal Year Focus	2023
Entity File Number	000-00981
Entity Registrant Name	PUBLIX SUPER MARKETS, INC.
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	59-0324412
Entity Address, Address Line One	3300 Publix Corporate Parkway, Lakeland, Florida
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
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	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction Flag	false
Entity Shell Company	false
Entity Public Float			$ 31,576,000,000
Entity Common Stock, Shares Outstanding		3,289,000,000
Document Fiscal Period Focus	FY
Entity Central Index Key	0000081061
Document Transition Report	false
Auditor Name	KPMG LLP
Auditor Firm ID	185
Auditor Location	Tampa, Florida