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EMPLOYEE BENEFITS - Liabilities for employee benefits (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of defined benefit plans [line items] |  |
Gross employee benefits | $ 1,027,429 | $ 924,832
Plan Asset | (24,126) | (17,024)
Net employee benefits | 1,003,303 | 907,808
Short Term Benefits |  |
Disclosure of defined benefit plans [line items] |  |
Gross employee benefits | 441,644 | 385,296
Post-Employment benefits |  |
Disclosure of defined benefit plans [line items] |  |
Gross employee benefits | 405,240 | 380,207
Long-Term Benefits |  |
Disclosure of defined benefit plans [line items] |  |
Gross employee benefits | $ 180,545 | $ 159,329

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- Definition The amount of gross deficit in a defined benefit plan. + References No definition available. + Details
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Namespace Prefix: | aval_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of assets held by retirement benefit plans. [Refer: Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 26 -IssueDate 2024-01-01 -Paragraph 35 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=26&code=ifrs-tx-2024-en-r&anchor=para_35_a_i&doctype=Standard -URIDate 2024-03-27 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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