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Trade and other receivables (Details 3) - CLP ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Statement [Line Items] |  |
Balance at the beginning of year | $ (5,792,821) | $ (6,059,201)
Estimate of expected credit losses up 12 months | (2,324,015) | (1,837,905)
Estimate of expected credit losses longer than 12 months | (349,928) | (267,183)
Estimate for expected credit losses due to debt settlement | (151,343) | (11,660)
Impairment provision of accounts receivable | (2,881,290) | (2,116,748)
Uncollectible accounts | 1,269,299 | 1,711,930
Add back of unused provisions | 701,121 | 398,405
Effect of translation into presentation currency | 380,393 | 272,793
Total | $ (6,323,298) | $ (5,792,821)

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- Definition Additional allowance for credit losses due to debt settlement. + References No definition available. + Details
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Namespace Prefix: | ccu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Allowance accounts for credit losses expected longer than twelve months. + References No definition available. + Details
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Namespace Prefix: | ccu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Allowance accounts for credit losses expected up twelve months. + References No definition available. + Details
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Namespace Prefix: | ccu_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The amount of increase (decrease) in allowance for credit losses of financial assets from adding back unused provisions. + References No definition available. + Details
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Namespace Prefix: | ccu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of increase (decrease) in allowance for credit losses of financial assets from uncollectable accounts. + References No definition available. + Details
Name: | ccu_IncreaseDecreaseFromUncollectableAccounts
Namespace Prefix: | ccu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of impairment loss on financial assets. [Refer: Financial assets; Impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 20 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_e&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in an allowance account for credit losses of financial assets resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Allowance account for credit losses of financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_16&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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