XML 52 R39.htm IDEA: XBRL DOCUMENT
v3.20.2

Summary Of Significant Accounting Policies (Schedule Of Advertising Expense As A Percentage Of Net Sales) (Details) | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Accounting Policies [Abstract] |  |  |
Advertising expense as a percentage of net sales | 2.00% | 2.00% | 2.00%

X
- Definition Advertising Expense As Percentage Of Net Sales + References No definition available. + Details
Name: | lanc_AdvertisingExpenseAsPercentageOfNetSales
Namespace Prefix: | lanc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration