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Financial Information as per operating segments (Details Textual)	12 Months Ended
	Dec. 31, 2020 USD ($)
CCU Argentina S.A. [Member]
Disclosure of operating segments [line items]
Gain On Termination Of License	$ 208,842,443
Loss On Termination Of License	157,358,973
Interational Business Operating Segment [Member]
Disclosure of operating segments [line items]
Gain On Termination Of License	211,228,960
Loss On Termination Of License	$ 2,386,517

X

- Definition

The amount of gain on termination of license.

+ References

No definition available.

+ Details

Name:	ccu_GainOnTerminationOfLicense
Namespace Prefix:	ccu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount of Loss on termination of license.

+ References

No definition available.

+ Details

Name:	ccu_LossOnTerminationOfLicense
Namespace Prefix:	ccu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfOperatingSegmentsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=ccu_CcuArgentinaSaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=ccu_InterationalBusinessOperatingSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: