Document And Entity Information In Thousands, unless otherwise specified	6 Months Ended
	Dec. 31, 2012	Jan. 25, 2013
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000057515
Entity Registrant Name	LANCASTER COLONY CORP
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		27,313
Document Period End Date	Dec. 31, 2012
Document Fiscal Year Focus	2013
Current Fiscal Year End Date	--06-30