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v3.21.2

Pension Benefits (Narrative) (Details) | 12 Months Ended
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Jun. 30, 2021
Defined Benefit Pension Plans [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Minimum length of investment horizon (in years) | 10 years

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- 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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |