Document And Entity Information In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Oct. 24, 2012
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000057515
Entity Registrant Name	LANCASTER COLONY CORP
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		27,298
Document Period End Date	Sep. 30, 2012
Document Fiscal Year Focus	2013
Current Fiscal Year End Date	--06-30