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Pension Benefits (Narrative) (Details) - 12 months ended Jun. 30, 2015 - Pension Benefits [Member] - USD ($)	Total
Defined Benefit Plan Disclosure [Line Items]
Minimum length of investment horizon (in years)	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

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Namespace Prefix:	lanc_
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X

- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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=35743120&loc=d3e1928-114920

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X

- Details

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