Document and Entity Information - shares	9 Months Ended
	Sep. 24, 2022	Oct. 14, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Amendment Flag	false
Document Period End Date	Sep. 24, 2022
Document Transition Report	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Entity File Number	000-00981
Entity Registrant Name	PUBLIX SUPER MARKETS, INC.
Entity Central Index Key	0000081061
Entity Incorporation, State or Country Code	FL
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
Current Fiscal Year End Date	--12-31
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
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		3,354,213,000