XML 48 R35.htm IDEA: XBRL DOCUMENT
v3.25.4

Summary of Significant Accounting Policies (Tables) | 12 Months Ended
--- | ---
Dec. 27, 2025
Accounting Policies [Abstract] |
Estimated Useful Lives |
Kegs | 5 years
Computer software and equipment | 2 to 5 years
Office equipment and furniture | 3 to 7 years
Machinery and plant equipment | 3 to 20 years
Leasehold improvements | Lesser of the remaining term of the lease or estimated useful life of the asset
Building and building improvements | 12 to 20 years, or the remaining useful life of the building, whichever is shorter

X
- Definition Schedule Of Property Plant And Equipment Useful Life Table [Text Block] + References No definition available. + Details
Name: | sam_ScheduleOfPropertyPlantAndEquipmentUsefulLifeTableTextBlock
Namespace Prefix: | sam_
Data Type: | dtr-types:textBlockItemType
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