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Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Jun. 30, 2014
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Accounting Policies [Abstract] |  |
Accrued distribution | $ 8.3lanc_AccruedDistributionCosts | $ 6.4lanc_AccruedDistributionCosts

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- Definition 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). + References No definition available. + Details
Name: | lanc_AccruedDistributionCosts
Namespace Prefix: | lanc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration