Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Jun. 30, 2014
Accounting Policies [Abstract]
Accrued distribution	$ 6.1lanc_AccruedDistributionCosts	$ 6.4lanc_AccruedDistributionCosts

Carrying value as of the balance sheet date of obligations incurred through that date and payable for various costs associated with shipping products to the customer. These accruals are based on historical information as may be modified by estimates of actual costs incurred. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

No definition available.

Name:	lanc_AccruedDistributionCosts
Namespace Prefix:	lanc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant