Document and Entity Information - shares	3 Months Ended
	Apr. 01, 2017	Apr. 14, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 01, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Trading Symbol	ck0000081061
Entity Registrant Name	PUBLIX SUPER MARKETS INC
Entity Central Index Key	0000081061
Current Fiscal Year End Date	--12-30
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		766,995,000