XML 60 R48.htm IDEA: XBRL DOCUMENT
v3.25.4

Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($) $ in Millions | Dec. 27, 2025 | Dec. 28, 2024
--- | --- | ---
Investments |  |
Cash Equivalents, at Carrying Value [Abstract] |  |
Cash equivalents | $ 49.0 | $ 129.7
Consumer electronic payment |  |
Cash Equivalents, at Carrying Value [Abstract] |  |
Cash equivalents | $ 41.5 | $ 31.6

X
- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CashEquivalentsAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=us-gaap_InvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=wmk_ConsumerElectronicPaymentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |