ESTIMATION OF FAIR VALUE - Measurements of fair value of assets on a recurring basis (Details) - COP ($)
$ in Millions

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

Dec. 31, 2021

Disclosure of fair value measurement of assets [line items]

Assets

$ 327,859,383

$ 301,181,596

Recurring fair value measurement [member]

Disclosure of fair value measurement of assets [line items]

Assets

54,083,268

44,913,854

Recurring fair value measurement [member] | Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,181,835

3,830,916

Recurring fair value measurement [member] | Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,181,835

3,830,916

Recurring fair value measurement [member] | Debt securities [member]

Disclosure of fair value measurement of assets [line items]

Assets

38,989,037

30,442,045

Recurring fair value measurement [member] | Debt securities [member] | Financial assets at fair value through profit or loss, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

11,938,839

7,115,269

Recurring fair value measurement [member] | Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

11,937,414

7,113,380

Recurring fair value measurement [member] | Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

27,050,198

23,326,776

Recurring fair value measurement [member] | Securities issued or secured by Colombian Government | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

10,641,558

5,794,832

Recurring fair value measurement [member] | Securities issued or secured by Colombian Government | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

18,267,908

16,790,793

Recurring fair value measurement [member] | Securities issued or secured by other Colombian Government entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

183,760

155,737

Recurring fair value measurement [member] | Securities issued or secured by other Colombian Government entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

462,745

863,788

Recurring fair value measurement [member] | Securities issued or secured by foreign Governments | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

75,379

32,079

Recurring fair value measurement [member] | Securities issued or secured by foreign Governments | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,502,810

2,507,038

Recurring fair value measurement [member] | Securities issued by central banks | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

204,855

145,489

Recurring fair value measurement [member] | Securities issued or secured by other financial entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,002,194

1,084,461

Recurring fair value measurement [member] | Securities issued or secured by other financial entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

2,626,783

2,142,647

Recurring fair value measurement [member] | Securities issued by entities of the non-financial sector entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

8,813

6,406

Recurring fair value measurement [member] | Securities issued by entities of the non-financial sector entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

249,660

214,571

Recurring fair value measurement [member] | Other debt securities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

25,710

39,865

Recurring fair value measurement [member] | Other debt securities | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,425

1,889

Recurring fair value measurement [member] | Other debt securities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

735,437

662,450

Recurring fair value measurement [member] | Equity securities

Disclosure of fair value measurement of assets [line items]

Assets

8,677,809

7,377,523

Recurring fair value measurement [member] | Trading equity securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

7,256,506

6,260,174

Recurring fair value measurement [member] | Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,421,303

1,117,349

Recurring fair value measurement [member] | Derivatives [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

969,294

2,077,567

Recurring fair value measurement [member] | Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

54,019

48,662

Recurring fair value measurement [member] | Currency forward [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

530,625

1,666,852

Recurring fair value measurement [member] | Currency forward [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

10,642

687

Recurring fair value measurement [member] | Bond forward [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

117,053

19,258

Recurring fair value measurement [member] | Interest rate swap contract [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

222,829

308,368

Recurring fair value measurement [member] | Interest rate swap contract [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

43,377

47,975

Recurring fair value measurement [member] | Currency swap contract [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

58,475

20,195

Recurring fair value measurement [member] | Currency Options [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

40,312

62,894

Recurring fair value measurement [member] | Non-financial assets [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,211,274

1,137,141

Recurring fair value measurement [member] | Biological assets [member]

Disclosure of fair value measurement of assets [line items]

Assets

238,339

230,672

Recurring fair value measurement [member] | Investment property [member]

Disclosure of fair value measurement of assets [line items]

Assets

972,935

906,469

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member]

Disclosure of fair value measurement of assets [line items]

Assets

26,567,032

22,599,214

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Debt securities [member]

Disclosure of fair value measurement of assets [line items]

Assets

25,247,294

21,597,917

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Debt securities [member] | Financial assets at fair value through profit or loss, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

10,606,156

5,693,319

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

10,606,156

5,693,319

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

14,641,138

15,904,598

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Securities issued or secured by Colombian Government | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

10,580,049

5,692,937

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Securities issued or secured by Colombian Government | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

13,391,650

14,223,066

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Securities issued or secured by other Colombian Government entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

52,253

538,200

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Securities issued or secured by foreign Governments | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

26,107

382

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Securities issued or secured by foreign Governments | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,195,495

1,141,875

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Other debt securities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,740

1,457

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Equity securities

Disclosure of fair value measurement of assets [line items]

Assets

1,315,223

1,001,085

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Trading equity securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

12,711

8,949

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,302,512

992,136

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Derivatives [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,515

212

Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Interest rate swap contract [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,515

212

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member]

Disclosure of fair value measurement of assets [line items]

Assets

18,808,725

14,574,468

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Debt securities [member]

Disclosure of fair value measurement of assets [line items]

Assets

13,740,318

8,842,239

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Debt securities [member] | Financial assets at fair value through profit or loss, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,331,258

1,420,061

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,331,258

1,420,061

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

12,409,060

7,422,178

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by Colombian Government | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

61,509

101,895

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by Colombian Government | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,876,258

2,567,727

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by other Colombian Government entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

183,760

155,737

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by other Colombian Government entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

410,492

325,588

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by foreign Governments | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

49,272

31,697

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by foreign Governments | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

3,307,315

1,365,163

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued by central banks | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

204,855

145,489

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by other financial entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,002,194

1,084,461

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued or secured by other financial entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

2,626,783

2,142,647

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued by entities of the non-financial sector entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

8,813

6,406

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Securities issued by entities of the non-financial sector entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

249,660

214,571

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Other debt securities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

25,710

39,865

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Other debt securities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

733,697

660,993

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Equity securities

Disclosure of fair value measurement of assets [line items]

Assets

4,049,609

3,606,212

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading equity securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,049,509

3,605,832

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]

Disclosure of fair value measurement of assets [line items]

Assets

100

380

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Derivatives [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

964,779

2,077,355

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

54,019

48,662

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Currency forward [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

530,625

1,666,852

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Currency forward [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

10,642

687

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Bond forward [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

117,053

19,258

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Interest rate swap contract [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

218,314

308,156

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Interest rate swap contract [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

43,377

47,975

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Currency swap contract [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

58,475

20,195

Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Currency Options [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

40,312

62,894

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]

Disclosure of fair value measurement of assets [line items]

Assets

8,707,511

7,740,172

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,181,835

3,830,916

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

4,181,835

3,830,916

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Debt securities [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,425

1,889

$ 1,383

$ 88,821

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Debt securities [member] | Financial assets at fair value through profit or loss, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,425

1,889

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Other debt securities | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,425

1,889

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Equity securities

Disclosure of fair value measurement of assets [line items]

Assets

3,312,977

2,770,226

2,302,280

1,357,164

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Trading equity securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]

Disclosure of fair value measurement of assets [line items]

Assets

3,194,286

2,645,393

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]

Disclosure of fair value measurement of assets [line items]

Assets

118,691

124,833

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Non-financial assets [member]

Disclosure of fair value measurement of assets [line items]

Assets

1,211,274

1,137,141

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Biological assets [member]

Disclosure of fair value measurement of assets [line items]

Assets

238,339

230,672

212,630

154,986

Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Investment property [member]

Disclosure of fair value measurement of assets [line items]

Assets

$ 972,935

$ 906,469

$ 880,963

$ 852,935