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Provisions for employees' benefits - Maturity of benefit obligation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 COP ($)
2024
Disclosure of defined benefit plans
payment of post-employment obligations	$ 1,976,751
2024 | Pension and bonds
Disclosure of defined benefit plans
payment of post-employment obligations	1,293,410
2024 | Other benefits
Disclosure of defined benefit plans
payment of post-employment obligations	683,341
2025
Disclosure of defined benefit plans
payment of post-employment obligations	2,036,511
2025 | Pension and bonds
Disclosure of defined benefit plans
payment of post-employment obligations	1,327,478
2025 | Other benefits
Disclosure of defined benefit plans
payment of post-employment obligations	709,033
2026
Disclosure of defined benefit plans
payment of post-employment obligations	2,084,362
2026 | Pension and bonds
Disclosure of defined benefit plans
payment of post-employment obligations	1,342,616
2026 | Other benefits
Disclosure of defined benefit plans
payment of post-employment obligations	741,746
2027
Disclosure of defined benefit plans
payment of post-employment obligations	2,112,590
2027 | Pension and bonds
Disclosure of defined benefit plans
payment of post-employment obligations	1,336,802
2027 | Other benefits
Disclosure of defined benefit plans
payment of post-employment obligations	775,788
2029
Disclosure of defined benefit plans
payment of post-employment obligations	2,168,648
2029 | Pension and bonds
Disclosure of defined benefit plans
payment of post-employment obligations	1,351,056
2029 | Other benefits
Disclosure of defined benefit plans
payment of post-employment obligations	817,592
2029
Disclosure of defined benefit plans
payment of post-employment obligations	11,504,859
2029 | Pension and bonds
Disclosure of defined benefit plans
payment of post-employment obligations	6,893,350
2029 | Other benefits
Disclosure of defined benefit plans
payment of post-employment obligations	$ 4,611,509

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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.

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- Definition

The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 147
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_147_b&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2023-01-01
-Paragraph 148
-Subparagraph d
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_148_d_iii&doctype=Standard
-URIDate 2023-03-23

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