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Pension Benefits (Narrative) (Details) (Pension Benefits [Member], USD $) | 12 Months Ended
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Jun. 30, 2014
Pension Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Minimum length of investment horizon | 10 years
Estimated employer contributions to pension plans in next fiscal year | $ 0

X
- Definition Minimum number of years in investment horizon for defined benefit pension plan assets in consideration of the average age of the plans' participants. + References No definition available. + Details
Name: | lanc_MinimumNumberOfYearsInInvestmentHorizon
Namespace Prefix: | lanc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration