Bancolombia (CIB) 20-F 24 Apr 19 2018 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information	12 Months Ended
	Dec. 31, 2018shares
Document and Entity Information [Abstract]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Entity Registrant Name	BANCOLOMBIA SA
Entity Central Index Key	0001071371
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Trading Symbol	CIB
Entity Common Stock, Shares Outstanding	509,704,584
Entity Shell Company	false
Entity Emerging Growth Company	false

CONSOLIDATED STATEMENT OF FINAN

CONSOLIDATED STATEMENT OF FINANCIAL POSITION $ in Thousands, $ in Millions		Dec. 31, 2018COP ($)		Dec. 31, 2017COP ($)
ASSETS
Cash and cash equivalents		$ 18,730,810		$ 18,165,644
Financial assets Investments		17,361,475		16,377,253
Derivative financial instruments		1,843,708		1,134,372
Financial assets investments and derivative financial instruments		19,205,183		17,511,625
Loans and advances to customers and financial institutions		173,819,116		160,468,094
Allowance for loans, advances and lease losses		(10,235,831)		(8,223,103)
Loans and advances to customers and financial institutions, net		163,583,285		152,244,991
Assets held for sale and inventories, net		636,028		377,003
Investment in associates and joint ventures		2,149,579	[1]	1,565,059	[2]
Investment properties	[3]	1,732,873		1,657,409
Premises and equipment, net		3,368,647		3,127,405
Goodwill and intangible assets, net		7,201,855		6,631,424
Deferred tax, net		271,177		148,614
Other assets, net		3,234,181		2,479,037
TOTAL ASSETS		220,113,618		203,908,211
LIABILITIES
Deposits by customers		142,128,471		131,959,215
Interbank deposits		1,374,222		1,084,591
Repurchase agreements and other similar secured borrowing		2,315,555		3,236,128
Liabilities relating to assets held for sale		163,596		102,976
Derivative financial instruments		1,295,070		945,853
Borrowings from other financial institutions		16,337,964		13,822,152
Debt instruments in issue		20,287,233		19,648,714
Preferred shares		583,997		582,985
Current tax		166,472		161,966
Deferred tax, net		1,318,295		1,440,198
Employees benefit plans		719,265		697,401
Other liabilities		6,768,253		5,796,482
TOTAL LIABILITIES		193,458,393		179,478,661
EQUITY
Share capital		480,914		480,914
Additional paid-in-capital		4,857,454		4,857,454
Appropriated reserves		9,741,774		9,045,155
Retained earnings		3,906,945		3,568,182
Net income attributable to equity holders of the Parent Company		2,658,864		2,615,000
Accumulated other comprehensive income, net of tax		3,202,969		2,546,259
STOCKHOLDERS' EQUITY ATTRIBUTABLE TO THE OWNERS OF THE PARENT COMPANY		24,848,920		23,112,964
Non-controlling interest		1,806,305		1,316,586
TOTAL EQUITY		26,655,225		24,429,550
TOTAL LIABILITIES AND EQUITY		$ 220,113,618		$ 203,908,211
[1]	As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[2]	As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[3]	Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC).

CONSOLIDATED STATEMENT OF INCOM

CONSOLIDATED STATEMENT OF INCOME - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Interest on loans and financial leases
Commercial	$ 7,322,453		$ 8,027,598		$ 7,952,627
Consumer	4,220,032		3,822,743		3,069,124
Small business loans	229,446		237,266		236,979
Mortgage	1,881,297		1,831,716		1,767,761
Financial leases	1,913,196		2,064,978		1,993,851
Interest income on loans and financial leases	15,566,424		15,984,301	[1]	15,020,342	[2]
Interest on debt instruments using the effective interest method	129,017		159,890		164,549
Total Interest of debt instruments using the effective interest method	15,695,441		16,144,191		15,184,891
Interest income on overnight and market funds	36,449		26,779		20,968
Interest and valuation on financial instruments	384,610		525,423		542,946
Total interest and valuation on financial instruments	16,116,500		16,696,393		15,748,805	[2]
Interest expenses	(5,670,216)		(6,232,986)	[1]	(6,053,100)	[2]
Net interest margin and valuation on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments	10,446,284		10,463,407	[1]	9,695,705	[2]
Credit impairment charges on loans, advances and financial leases, net	(3,851,625)		(3,468,699)		(2,643,710)
Credit recovery (impairment) for other financial instruments	8,553		7,082		(87,442)
Total credit impairment charges, net	(3,843,072)		(3,461,617)	[1]	(2,731,152)	[2]
Net interest margin and valuation on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments	6,603,212		7,001,790	[1]	6,964,553	[2]
Fees and commissions income	3,994,259	[3]	3,621,114	[1],[3]	3,299,933	[2],[4]
Fees and commissions expenses	(1,213,056)		(1,075,115)	[1]	(968,970)	[2]
Total fees and commissions, net	2,781,203		2,545,999	[1]	2,330,963	[2]
Other operating income	1,203,802		1,578,209	[1]	1,466,655	[2]
Dividends received, and share of profits of equity method investees	341,795		266,170	[1]	176,692	[2]
Recovery (Impairment) charges on cash-generating unit	168,756		(173,339)		0
Total operating income, net	11,098,768		11,218,829	[1]	10,938,863	[2]
Operating expenses
Salaries and employee benefits	(3,004,054)		(2,792,379)		(2,808,931)
Other administrative and general expenses	(3,024,769)		(2,977,884)		(2,644,392)
Wealth tax, contributions and other tax burden	(692,666)		(727,661)		(741,184)
Impairment, depreciation and amortization	(493,902)		(479,111)		(517,809)
Other operating expenses	(267,507)		(249,023)		(258,265)
Total operating expenses	(7,482,898)		(7,226,058)	[1]	(6,970,581)	[2]
Profit before tax	3,615,870		3,992,771	[1]	3,968,282	[2]
Income tax	(829,435)		(1,238,598)		(1,176,832)
Profit for the year from continued operations	2,786,435		2,754,173		2,791,450
Net income from discontinued operations	0		0		163,497
Net income	2,786,435		2,754,173		2,954,947
Net income attributable to equity holders of the Parent Company	2,658,864		2,615,000		2,865,328
Non-controlling interest	$ 127,571		$ 139,173		$ 89,619
Basic and Diluted earnings per share to common shareholders, stated in units of pesos	$ 2,825		$ 2,780		$ 3,040
From continuing operations	2,825		2,780		2,870
From discontinuing operations	$ 0		$ 0		$ 170
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[3]	For further information about income from contracts with customers, see note 24.3. Fees and commissions.
[4]	Includes staff costs, other administration and general expenses, contributions and other tax burdens and others.

CONSOLIDATED STATEMENT OF COMPR

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of comprehensive income [abstract]
Net income		$ 2,786,435	$ 2,754,173	$ 2,954,947
Other comprehensive income/(loss) that will not be reclassified to net income
Remeasurement income related to defined benefit liability		37,325	3,753	626
Income tax		(7,663)	(3,725)	(10,966)
Net of tax amount		29,662	28	(10,340)
Gain on investments transferred to retained earnings upon disposal	[1]	0	0	(42,414)
Transfer within equity upon merger of equity investments	[2]	0	(38,420)	0
Unrealized gain		23,648	67,515	250,690
Income tax		10,190	9,789	24,341
Net of tax amount		33,838	38,884	232,617
Total other comprehensive income that will not be reclassified to net income, net of tax		63,500	38,912	222,277
Investments in debt instruments measured at fair value through other comprehensive income (FVTOCI)
Gain on investments recycled to profit or loss upon disposal		1,965	0	0
Unrealized gain		(24,286)	0	0
Changes in loss allowance for credit losses		2,444	0	0
Income tax		0	0	0
Net of tax amount		(19,877)	0	0
Foreign currency translation adjustments:
Exchange differences arising on translating the foreign operations		1,043,593	412,878	(672,684)
Gain/(loss) on net investment hedge in foreign operations		(584,650)	36,762	327,272
Income tax		172,870	(6,895)	0
Net of tax amount		631,813	442,745	(345,412)
Net loss on cash flow hedges	[3]	0	0	(12,112)
Net of tax amount		0	0	(12,112)
Unrealized gain/(loss) on investments in associates and joint ventures using equity method		2,581	(11,547)	(1,718)
Income tax		(663)	0	0
Net of tax amount		1,918	(11,547)	(1,718)
Total comprehensive income/(loss) that may be reclassified to net income, net of tax		613,854	431,198	(359,242)
Comprehensive income/(loss), net of tax		677,354	470,110	(136,965)
Total comprehensive income attributable to:		3,463,789	3,224,283	2,817,982
Equity holders of the Parent Company		3,336,218	3,085,110	2,728,363
Non-controlling interests		$ 127,571	$ 139,173	$ 89,619
[1]	On May 31, 2016, the Bank completed the process for the sale of all of its minority stake in Cifin S.A. This sale, involved various financial institutions as sellers, including Bancolombia S.A., and TransUnion Netherlands II B.V., as buyer.
[2]	Likewise, during 2017, the Bank transferred from OCI to retained earnings the amount of COP 38,420 mainly due to the merger between Bolsa de Valores de Colombia BVC and Deceval. The Bank held equity investments of both issuers designated as at FVTOCI.
[3]	In 2016 the Bank's subsidiary, Banistmo, discontinued cash flow hedge accounting. For further information see Note 5.2. Derivatives Financial Instruments.

CONSOLIDATED STATEMENT OF COM_2

CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) $ in Millions	12 Months Ended
	Dec. 31, 2017COP ($)
Amounts removed from equity and adjusted against fair value of financial assets on reclassification out of fair value through other comprehensive income measurement category, before tax	$ 38,420	[1]
Merger [Member]
Amounts removed from equity and adjusted against fair value of financial assets on reclassification out of fair value through other comprehensive income measurement category, before tax	$ 38,420
[1]	Likewise, during 2017, the Bank transferred from OCI to retained earnings the amount of COP 38,420 mainly due to the merger between Bolsa de Valores de Colombia BVC and Deceval. The Bank held equity investments of both issuers designated as at FVTOCI.

CONSOLIDATED STATEMENT OF CHANG

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY - COP ($) $ in Millions		Total	Adjusted [Member]	Share Capital [Member]	Share Capital [Member]Adjusted [Member]	Additional Paid in capital [Member]	Additional Paid in capital [Member]Adjusted [Member]	Appropiated Reserves [Member]	Appropiated Reserves [Member]Adjusted [Member]	Translation adjustment [Member]	Translation adjustment [Member]Adjusted [Member]	Equity securities through OCI [Member]	Equity securities through OCI [Member]Adjusted [Member]	Debt instruments at fair value though OCI [Member]	Debt instruments at fair value though OCI [Member]Adjusted [Member]	Cash flow Hedge Reserve [Member]	Associates [Member]	Associates [Member]Adjusted [Member]	Empolyee Benefits [Member]	Empolyee Benefits [Member]Adjusted [Member]	Retained earnings [Member]	Retained earnings [Member]Adjusted [Member]	Net income [Member]	Net income [Member]Adjusted [Member]	Attributable to owners of parent company [Member]	Attributable to owners of parent company [Member]Adjusted [Member]	Non-Controlling interest [Member]	Non-Controlling interest [Member]Adjusted [Member]
Balance at Dec. 31, 2015		$ 20,407,919		$ 480,914		$ 4,857,454		$ 5,877,379		$ 2,153,056		$ 108,012				$ 12,112	$ 10,240		$ (70,306)		$ 3,753,427		$ 2,097,161		$ 19,279,449		$ 1,128,470
Transfer to profit from previous years		0		0		0		0		0		0				0	0		0		2,097,161		(2,097,161)		0		0
Dividend payment corresponding to 509,704,584 common shares and 452,122,416 preferred shares without voting rights, subscribed and paid		(796,517)		0		0		0		0		0				0	0		0		(796,517)		0		(796,517)		0
Legal reserve movements		0		0		0		1,554,425		0		0				0	0		0		(1,554,425)		0		0		0
Release of reserves by law		0		0		0		(377,471)		0		0				0	0		0		377,471		0		0		0
Increase of reserves by law		0		0		0		421,730		0		0				0	0		0		(421,730)		0		0		0
Non-controlling interest		(8,692)		0		0		0		0		0				0	0		0		0		0		0		(8,692)
Other reserves	[1]	0		0		0		(3,654)		0		0				0	0		0		3,654		0		0		0
Gains on investment written off		0		0		0		0		0		(42,414)				0	0		0		42,414		0		0		0
Net income		2,954,947		0		0		0		0		0				0	0		0		0		2,865,328		2,865,328		89,619
Other comprehensive income		(136,965)		0		0		0		(345,412)		275,031				(12,112)	(1,718)		(10,340)		13,874		0		(80,677)		0
Balance at Dec. 31, 2016		22,476,980		480,914		4,857,454		7,472,409		1,807,644		340,629				$ 0	8,522		(80,646)		3,515,329		2,865,328		21,267,583		1,209,397
Transfer to profit from previous years		0		0		0		0		0		0					0		0		2,865,328		(2,865,328)		0		0
Dividend payment corresponding to 509,704,584 common shares and 452,122,416 preferred shares without voting rights, subscribed and paid		(856,419)		0		0		0		0		0					0		0		(856,419)		0		(856,419)		0
Legal reserve movements		0		0		0		1,914,464		0		0					0		0		(1,914,464)		0		0		0
Release of reserves by law		(421,730)		0		0		(421,730)		0		0					0		0		0		0		(421,730)		0
Increase of reserves by law		0		0		0		77,398		0		0					0		0		(77,398)		0		0		0
Sale of financial instruments		0		0		0		0		0		(38,420)					0		0		38,420		0		0		0
Non-controlling interest		(31,984)		0		0		0		0		0					0		0		0		0		0		(31,984)
Other reserves	[1]	0		0		0		2,614		0		0					0		0		(2,614)		0		0		0
Net income		2,754,173		0		0		0		0		0					0		0		0		2,615,000		2,615,000		139,173
Other comprehensive income		470,110		0		0		0		442,745		77,304					(11,547)		28		0		0		508,530		0
Balance at Dec. 31, 2017		24,429,550	$ 23,679,769	480,914	$ 480,914	4,857,454	$ 4,857,454	9,045,155	$ 9,045,155	2,250,389	$ 2,250,389	379,513	$ 379,513	$ 0	$ 0		(3,025)	$ (3,025)	(80,618)	$ (80,618)	3,568,182	$ 2,836,542	2,615,000	$ 2,615,000	23,112,964	$ 22,381,324	1,316,586	$ 1,298,445
Effect of adoption of new accounting standards (Note 32 Impacts on application of new standards)		(749,781)		0		0		0		0		0		0			0		0		(731,640)		0		(731,640)		(18,141)
Transfer to profit from previous years		0		0		0		0		0		0		0			0		0		2,615,000		(2,615,000)		0		0
Dividend payment corresponding to 509,704,584 common shares and 452,122,416 preferred shares without voting rights, subscribed and paid		(923,362)		0		0		0		0		0		0			0		0		(923,362)		0		(923,362)		0
Release of reserves by law		0		0		0		579,254		0		0		0			0		0		(579,254)		0		0		0
Disposal of debt/equity instruments		0		0		0		0		0		(20,644)					0		0		20,644		0		0		0
Subsidiaries' liquidation		512		0		0		0		0		0		0			0		0		512		0		512		0
Realization of retained earnings		1,090		0		0		0		0		0		0			0		0		1,090		0		1,090
Non-controlling interest		380,289		0		0		0		0		0		0			0		0		0		0		0		380,289
Other reserves	[1]	0		0		0		117,365		0		0					0		0		(117,365)		0		0		0
Changes in shareholdings subsidiaries		53,138		0		0		0		0		0		0			0		0		53,138		0		53,138		0
Net income		2,786,435		0		0		0		0		0		0			0		0		0		2,658,864		2,658,864		127,571
Other comprehensive income		677,354		0		0		0		631,813		33,838		(19,877)			1,918		29,662		0		0		677,354		0
Balance at Dec. 31, 2018		$ 26,655,225		$ 480,914		$ 4,857,454		$ 9,741,774		$ 2,882,202		$ 392,707		$ (19,877)			$ (1,107)		$ (50,956)		$ 3,906,945		$ 2,658,864		$ 24,848,920		$ 1,806,305
[1]	This item corresponds to the dynamic reserves of Banistmo S.A., which correspond to an additional provision recognized on its low credit risk loan portfolio.

CONSOLIDATED STATEMENT OF CHA_2

CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Preference shares [member]
Number of shares outstanding	452,122,416	452,122,416	452,122,416
Dividends paid, ordinary shares per share	$ 1,020	$ 950	$ 888
Revaluation surplus [member]
Number of shares outstanding	509,704,584	509,704,584	509,704,584

CONSOLIDATED STATEMENT OF CASH

CONSOLIDATED STATEMENT OF CASH FLOW - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Statement of Cash Flows [Abstract]
Net income		$ 2,786,435	$ 2,754,173		$ 2,954,947
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		467,777	433,033		482,902
Equity method		(187,814)	(253,602)		(60,254)
Deferred tax expense		223,544	193,568		457,611
Credit impairment charges on loans and advances and financial leases		4,311,485	3,879,559		3,248,517
Credit impairment (recovery) charges on off balance sheet credit and other financial instruments		(8,553)	(6,854)		92,453
Gain on sales on assets held for sale and inventories		(75,976)	(40,600)		(60,294)
Valuation gain on investment securities		(630,904)	(736,075)		(721,984)
Gains on sale of loan portfolio		(12,556)	0		0
Loss (Gain) upon disposal of investment in subsidiary		510	2,700		(260,279)
Valuation (losses) on derivative financial instruments		(244,613)	39,750		(159,422)
Wealth tax		0	51,220		146,931
Income tax		605,891	1,045,030		821,796
Other non-cash ítems		(50,760)	202,829		(1,170)
Net interest		(10,371,051)	(9,919,699)		(9,389,915)
Change in operating assets and liabilities:
(increase) Decrease in derivative financial instruments		(132,684)	135,595		263,966
(increase) Decrease in accounts receivable		(423,960)	338,211		263,871
Increase in loans and advances to customers		(12,952,529)	(11,266,789)		(10,853,224)
Increase in other assets		(282,703)	(23,083)		(47,200)
(Decrease) increase in accounts payable		(273,855)	(629,990)		445,570
Increase in other liabilities		189,868	189,655		263,729
Increase in deposits by customers		6,188,577	8,456,681		5,117,996
Decrease in estimated liabilities and provisions		(12,919)	(16,608)		(56,741)
Net changes in investment securities recognized at fair value through profit or loss		615,093	(1,599,641)		1,485,514
Proceeds from sales of assets held for sale		363,407	331,645		272,830
Proceed from sale of loan porfolio		511,864	0		0
Wealth tax paid	[1]	0	(51,220)		(146,931)
Income tax paid		(167,856)	(199,127)		(192,045)
Dividend received		124,754	80,651		90,569
Interest received		15,585,632	15,347,265		14,370,840
Interest paid		(5,103,246)	(5,798,689)		(5,229,165)
Net cash provided by operating activities		1,042,858	2,939,588		3,601,418
Cash flows from investment activities:
Purchases of debt instruments at amortized cost		(2,380,202)	(3,122,872)		(2,077,078)
Proceeds from maturities of debt instruments at amortized cost		2,214,457	2,167,450		2,365,976
Purchases of debt instruments at fair value through OCI (2017: debt instruments at amortized cost and fair value through profit or loss)	[2]	(1,652,050)	0		0
Proceeds from debt instruments at fair value through OCI (2017: debt instruments at amortized cost and fair value through profit or loss)	[2]	1,525,435	0		0
Purchases of equity instruments and interests in associates and joint ventures		(289,361)	(305,650)		(487,782)
Proceeds from equity instruments and interests in associates and joint ventures		29,752	7,479		53,488
Restitution of associates' capital contributions		0	2,495		0
Purchases of premises and equipment and investment properties		(1,014,093)	(1,132,015)		(1,082,522)
Proceeds from sales of premises and equipment and investment properties		311,430	568,744		552,471
Net cash outflow from sales of investments in subsidiaries		0	0		(219,218)	[3]
Net cash outflow (inflow) from liquidation of investments in subsidiaries		26	(1,534)	[4]	(93)
Purchase of other long-term assets		(127,236)	(92,177)		(132,869)
Net cash (used in) provided by investing activities		(1,381,842)	(1,908,080)		(1,027,627)
Cash flows from financing activities:
(Decrease) Increase in repurchase agreements and other similar secured borrowing		(922,840)	1,313,442		706,341
Proceeds from borrowings from other financial institutions		15,774,251	12,190,496		13,594,292
Repayment of borrowings from other financial institutions		(14,472,128)	(17,042,665)		(13,744,676)
Placement of debt instruments in issue	[5]	1,150,485	3,013,426		3,039,485
Payment of debt instruments in issue		(1,886,850)	(1,969,399)		(3,099,039)
Dividends paid		(735,798)	(1,126,209)		(840,242)
Transactions with non-controlling interests	[6]	360,169	0		0
Net cash used in financing activities	[7]	(732,711)	(3,620,909)		(343,839)
Effect of exchange rate changes on cash and cash equivalents		1,636,861	294,800		(575,284)
(Decrease) increase in cash and cash equivalents		(1,071,695)	(2,589,401)		2,229,952
Cash and cash equivalents at beginning of year		18,165,644	20,460,245		18,805,577
Cash and cash equivalents at end of year		$ 18,730,810	$ 18,165,644		$ 20,460,245
[1]	The Bank was required to pay the wealth tax contribution until the tax year of 2017, in accordance with the Law 1739 of 2014. See Note 11 Income Tax
[2]	See adoption of new accounting standards in Note 32 impacts on application of new standards.
[3]	Corresponds to the net amount of cash received from the sale a 51% interest in Compañía de Financiamiento TUYA S.A. amounting to COP 9,517 and the balance of cash and cash equivalents held by the company at the transaction date amounting to COP 228,735.
[4]	Corresponds to the net amount of cash received from the liquidation of Leasing Perú S.A. and Fondo de Inversión en Arrendamiento Operativo - Renting Perú amounting to COP 16,838 and COP 3,757, respectively, and the balance of cash and cash equivalents held by the companies at the transaction date amounting to COP 17,903 and COP 4,226, respectively.
[5]	The issuance costs paid by Bancolombia S.A. amounted to USD 15,535. For further information see Note 17. Debt instruments in issue.
[6]	This item corresponds mainly to the capitalization of Fondo Colombia Inmobiliario.
[7]	For further information about the reconciliation of the balances of liabilities from financing activities, see Note 28. Liabilities from financing activities.

CONSOLIDATED STATEMENT OF CAS_2

CONSOLIDATED STATEMENT OF CASH FLOW (Parenthetical) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)		Dec. 31, 2016COP ($)
Statement of cash flows [line items]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities		$ (1,534)	[1]	$ (93)
Cash and cash equivalents		18,165,644		20,460,245
Transfer of loans and goods to foreclosed assets and inventories		331,057		487,122
Compania de Financiamiento Tuya Sa [member]
Statement of cash flows [line items]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities				9,517
Cash and cash equivalents				$ 228,735
Leasing Peru S.A. [Member]
Statement of cash flows [line items]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities		16,838
Cash and cash equivalents in subsidiary or businesses acquired or disposed		17,903
Fondo de Inversion en Arrendamiento Operativo Renting Peru [Member]
Statement of cash flows [line items]
Cash flows from losing control of subsidiaries or other businesses, classified as investing activities		3,757
Cash and cash equivalents in subsidiary or businesses acquired or disposed		$ 4,226
Bancolombia S A [Member]
Statement of cash flows [line items]
Payments for debt issue costs	$ 15,535
[1]	Corresponds to the net amount of cash received from the liquidation of Leasing Perú S.A. and Fondo de Inversión en Arrendamiento Operativo - Renting Perú amounting to COP 16,838 and COP 3,757, respectively, and the balance of cash and cash equivalents held by the companies at the transaction date amounting to COP 17,903 and COP 4,226, respectively.

REPORTING ENTITY

REPORTING ENTITY	12 Months Ended
	Dec. 31, 2018
Disclosure of reporting entity [Abstract]
Disclosure of reporting entity [text block]	NOTE 1. REPORTING ENTITY Bancolombia S.A., hereinafter the Parent Company, is a credit establishment, listed on the Colombia Stock Exchange (BVC), as well as on the New York Stock Exchange (NYSE), since 1981 and 1995, respectively. The Parent Company's main location is in Medellin (Colombia), and its principal address is Carrera 48 # 26-85, Avenida Los Industriales. The Parent Company was originally constituted under the name Colombian Industrial Bank (BIC) according to public deed number 388, date January 24, 1945, from the First Notary's Office of Medellin, authorized by the Superintendence of Finance of Colombia (“SFC”). On April 3, 1998, by means of public deed No. 633, BIC merged with Bank of Colombia S.A., and the resulting organization of that merger was named Bancolombia S.A. Bancolombia S.A.’s business purpose is to carry out all operations, transactions, acts and services inherent to the Banking business through banking establishments that carry its name and according to all applicable legislation. The Parent Company may own interests in other corporations, wherever authorized by law, according to all terms and requirements, limits or conditions established therein. The Parent Company and its subsidiaries (on a consolidated basis referred to as the “Bank”) include the following operating segments: Banking Colombia, Banking Panama, Banking El Salvador, Banking Guatemala, Trust, Investment banking, Brokerage, Off Shore and Others. The activities carried out by each operating segment of the Bank are described in Note 3, Operating segments. The duration of the Parent Company contemplated in the bylaws is until December 8, 2044, but it can be dissolved or renewed before the conclusion of that period. The operating license was authorized definitively by the SFC according to Resolution number 3140 on September 24, 1993. Through public deed number 1,124 of September 30, 2016, from the fourthteenth Notary’s Office of Medellin, duly registered in the Camara de Comercio de Medellín, a merger was completed between the Parent Company (absorbing entity) and Leasing Bancolombia S.A. (absorbed entity). As a result of the merger, the Parent Company became the holder of all the rights and obligations of Leasing Bancolombia S.A. and continues to offer its clients the portfolio of leasing products and services under the brand "Leasing Bancolombia, una marca Bancolombia". The Bank has 31,040 employees, and operates through 1,022 offices, 5,939 ATMs and 12,395 banking Correspondents. The Bank through its subsidiaries has banking, operational and international presence in Puerto Rico, Panama, Guatemala, the Cayman Islands, Barbados and El Salvador.

SIGNIFICANT ACCOUNTING POLICIES

SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2018
Disclosure of Significant Accounting Policies [Abstract]
Disclosure of significant accounting policies [text block]	NOTE 2. SIGNIFICANT ACCOUNTING POLICIES A. Basis for preparation The consolidated financial statements of the Bank are prepared in accordance with the International Financial Reporting Standards (hereinafter, IFRS) issued by the International Accounting Standards Board (hereinafter, IASB), as well as the interpretations issued by the International Financial Reporting Interpretations Committee (hereinafter, IFRS-IC). The preparation of financial statements in conformity with IFRS requires the use of accounting estimates which, by definition, will seldom equal the actual results. Therefore, the estimates and assumptions are constantly reviewed. Any revision is recongized in the same period if it affects the reviewed period; or in the reviewed period and future periods if it affects all the current and future periods. Assets and liabilities are measured at cost or amortized cost, except for some financial assets and liabilities and investment properties that are measured at fair value. Financial assets and liabilities measured at fair value comprise those classified as assets and liabilities at fair value through profit or loss, debt instruments and equity securities measured at fair value through other comprehensive income (“OCI”) and derivative instruments. Likewise, the carrying value of assets and liabilities that are designated as hedged items in a fair value hedge, is adjusted for changes in fair value attributable to the hedged risk. The consolidated financial statements are stated in Colombian pesos and its figures are stated in millions, except earnings per share, diluted earnings per share and the market exchange rate, which are stated in Colombian pesos, while other currencies (dollars, euro, pounds, etc.) are stated in thousands. The Parent Company’s financial statements, which have been prepared in accordance with “Normas de Contabilidad e Información Financiera” (NCIF) applicable to separate financial statements, are those that serve as the basis for the distribution of dividends and other appropriations by the stockholders. B. Presentation of financial statements The Bank presents the consolidated statement of financial position ordered by liquidity and the consolidated statement of income is prepared based on the nature of expenses. Revenues and expenses are not offset, unless such compensation is permitted or required by any accounting standard or interpretation and are described in the Bank's policies. The statement of comprehensive income presents net income and items of other comprehensive income classified by nature and grouped into those that will not be reclassified subsequently to profit or loss and those that will be reclassified when specific conditions are met. The Bank discloses the amount of income tax relating to each item of OCI. The consolidated statement of cash flows was prepared using the indirect method, whereby net income is adjusted for the effects of transactions of a non-cash nature, changes during the period in operating assets and liabilities, and items of income or expense associated with investing or financing cash flows. C. Consolidation 1. Subsidiaries The consolidated financial statements include the financial statements of Bancolombia S.A. and its subsidiaries as of and for the periods ended on December 31, 2018 and 2017. The Parent Company consolidates the financial results of the entities on which it exerts control. In accordance with IFRS 10, a subsidiary is an entity controlled by any of the entities that comprise The Bank, as long as the controlling entity has:  Power over the investee that give it the ability to direct their relevant activities that significantly affect the investee’s returns.  Exposure or rights to variable returns for its involvement with the investee.  Ability to use its power over the investee to affect the investor’s returns The Parent Company has the following subsidiaries making up the Bank´s organizational structure, which is currently registered as a corporate group: ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Fiduciaria Bancolombia S.A. Sociedad Fiduciaria Colombia Trust 98.81% 98.81% 98.81% Banca de Inversión Bancolombia S.A. Corporación Financiera Colombia Investment banking 100.00% 100.00% 100.00% Valores Bancolombia S.A. Comisionista de Bolsa Colombia Securities brokerage 100.00% 100.00% 100.00% Renting Colombia S.A.S. Colombia Operating leasing 100.00% 100.00% 100.00% Transportempo S.A.S. Colombia Transportation 100.00% 100.00% 100.00% Valores Simesa S.A. (1) Colombia Investments 67.73% 68.57% 68.57% Inversiones CFNS S.A.S. Colombia Investments 99.94% 99.94% 99.94% BIBA Inmobiliaria S.A.S. Colombia Real estate broker 100.00% 100.00% 100.00% FCP Fondo Colombia Inmobiliario. (2) Colombia Real estate broker 51.29% 63.47% 62.55% Prosicol S.A.S. (3) Colombia Pre-operating stage - - 68.57% Fideicomiso "Lote Abelardo Castro". Colombia Mercantil trust 67.39% 68.23% 68.23% Bancolombia Panamá S.A. Panama Banking 100.00% 100.00% 100.00% Sistemas de Inversiones y Negocios S.A. Sinesa Panama Investments 100.00% 100.00% 100.00% Banagrícola S.A. Panama Investments 99.16% 99.16% 99.16% Banistmo S.A. Panama Banking 100.00% 100.00% 100.00% Banistmo Investment Corporation S.A. Panama Trust 100.00% 100.00% 100.00% Financomer S.A. Panama Financial services 100.00% 100.00% 100.00% Leasing Banistmo S.A. Panama Leasing 100.00% 100.00% 100.00% Valores Banistmo S.A. Panama Purchase and sale of securities 100.00% 100.00% 100.00% Suvalor Panamá Fondos de Inversión S.A. Panama Holding 100.00% 100.00% 100.00% ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Suvalor Renta Fija Internacional Largo Plazo S.A. Panama Collective investment fund 100.00% 100.00% 100.00% Suvalor Renta Fija Internacional Corto Plazo S.A. Panama Collective investment fund 100.00% 100.00% 100.00% Banistmo Asset Management Inc. (4) Panama Purchase and sale of securities - - 100.00% Banistmo Capital Markets Group Inc. (5) Panama Purchase and sale of securities 100.00% 100.00% 100.00% Van Dyke Overseas Corp. (6) Panama Real estate broker - 100.00% 100.00% Inmobiliaria Bickford S.A. (6) Panama Real estate broker - 100.00% 100.00% Williamsburg International Corp. (6) Panama Real estate broker - 100.00% 100.00% Anavi Investment Corporation S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Desarrollo de Oriente S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Steens Enterpresies S.A. (5) Panama Portfolio holder 100.00% 100.00% 100.00% Ordway Holdings S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Grupo Agromercantil Holding S.A. Panama Holding 60.00% 60.00% 60.00% Banco Agrícola S.A. El Salvador Banking 97.36% 97.36% 97.36% Arrendadora Financiera S.A. Arfinsa El Salvador Leasing 97.37% 97.37% 97.36% Credibac S.A. de C.V. El Salvador Credit card services 97.36% 97.36% 97.36% Valores Banagrícola S.A. de C.V. El Salvador Securities brokerage 98.89% 98.89% 98.89% Inversiones Financieras Banco Agrícola S.A IFBA El Salvador Investments 98.89% 98.89% 98.89% Gestora de Fondos de Inversión Banagricola S.A. El Salvador Administers investment funds 98.89% 98.89% 98.89% Arrendamiento Operativo CIB S.A.C. (7) Peru Operating leasing 100.00% 100.00% 100.00% Fondo de Inversión en Arrendamiento Operativo - Renting Perú (8) Peru Car Rental - 100.00% 100.00% Capital Investments SAFI S.A. (8) Peru Trust - 100.00% 100.00% FiduPerú S.A. Sociedad Fiduciaria (7) Peru Trust 98.81% 98.81% 98.81% Leasing Perú S.A. (8) Peru Leasing - 100.00% 100.00% Banagrícola Guatemala S.A .(8) Guatemala Outsourcing - 99.16% 99.16% Banco Agromercantil de Guatemala S.A. Guatemala Banking 60.00% 60.00% 60.00% Seguros Agromercantil de Guatemala S.A. Guatemala Insurance company 59.17% 59.17% 59.17% Financiera Agromercantil S.A. Guatemala Financial services 60.00% 60.00% 60.00% Agrovalores S.A. Guatemala Securities brokerage 60.00% 60.00% 60.00% Tarjeta Agromercantil S.A. (8) Guatemala Credit Card - 60.00% 60.00% Arrendadora Agromercantil S.A. Guatemala Operating Leasing 60.00% 60.00% 60.00% Agencia de Seguros y Fianzas Agromercantil S.A. Guatemala Insurance company 60.00% 60.00% 60.00% Asistencia y Ajustes S.A. Guatemala Services 60.00% 60.00% 60.00% Serproba S.A. Guatemala Maintenance and remodelling services 60.00% 60.00% 60.00% Servicios de Formalización S.A. Guatemala Loans formalization 60.00% 60.00% 60.00% ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Conserjeria, Mantenimiento y Mensajería S.A. Guatemala Maintenance services 60.00% 60.00% 60.00% Media Plus S.A. (8) Guatemala Advertising and marketing - 60.00% 60.00% Mercom Bank Ltd. Barbados Banking 60.00% 60.00% 60.00% New Alma Enterprises Ltd. Bahamas Investments 60.00% 60.00% 60.00% Bancolombia Puerto Rico Internacional Inc. Puerto Rico Banking 100.00% 100.00% 100.00% Bancolombia Caymán S.A. Cayman Islands Banking 100.00% 100.00% 100.00% Bagrícola Costa Rica S.A. Costa Rica Outsourcing 99.16% 99.16% 99.16% (1) The decrease in the shareholding is due to the repurchase of outstanding stock by the subsidiary. (2) During 2018, the Bank's shareholding decreased in the subsidiary's capitalization process. (3) Investment sold by Valores Simesa during 2017. (4) Investment absorbed by Banistmo Capital Markets Group, Inc. during 2017. (5) Investments in non-operational stage. (6) Investment absorbed by Banistmo Capital Markets Group, Inc. during 2018. (7) Investment classified as assets held for sale. See Note 12 Assets held for sale and Inventories. (8) Investment liquidated during 2018. When necessary, adjustments are made to the accounting principles in the financial statements of subsidiaries to bring their accounting policies into line with the Bank’s accounting policies. All intragroup assets and liabilities, equity, income, expenses and cash flows relating to transactions between members of the Bank are eliminated in full on consolidation. Non-controlling interests in controlled entities are presented in profit or loss and equity separately from the Parent Company stockholders’ equity and profit or loss. When the Bank loses control over a subsidiary, any residual interest remaining on the Bank’s balances is measured at fair value; gains or losses arising from this measurement are recognized in net income There are restrictions on the ability of the Parent Company to obtain distributions of capital, due to the regulatory requirements of its subsidiaries in Panama. Banistmo and Bancolombia Panama have net assets before intercompany eliminations amounting to COP 8,186,449 and COP 6,872,171 at December 31, 2018 and 2017, respectively. The loans and financial leases granted by those subsidiaries are subject to prudential regulation in Panama issued by the Panamanian Superintency of Banks including a requirement to maintain minimum reserves as a countercyclical capital buffer. For the years ended at December 31, 2018 and 2017, the reserves recognized amounted to COP 1,020,913 and COP 616,814. These requirements restrict the ability of the aforementioned subsidiaries to make remittances of dividends to Bancolombia S.A., the ultimate parent, except in the event of liquidation. 2. Transactions between entities under common control Combination of entities under common control, i.e. transactions in which all the combining entities are under the control of the Bank both before and after the combination, and that control is not transitory, are outside the scope of the IFRS 3- Business combinations. Currently, there is no specific guidance for these transactions under IFRS, therefore, as permitted by IAS 8, the Bank has developed an accounting policy considering the pronouncements of other standard-setting bodies. The assets and liabilities recognized as a result of transactions between entities under common control are recognized at the carrying value of the acquiree’s financial statements. The Bank presents the net assets received prospectively from the date of the transfer. 3. Investments in associates and joint ventures An associate is an entity over which the Bank has significant influence. Significant influence is the power to participate in the financial and operating policy decisions of the investee but is not control or joint control over those policies. A joint venture is an entity that the Bank controls jointly with other participants, where the parties maintain a contractual agreement that establishes joint control over the relevant activities of the entity (which only exists when decisions about those activities require unanimous consent of the parties sharing control) and the parties have rights to the net assets of the joint arrangement. At the acquisition date, the excess of the acquisition cost of the associate or joint venture shares exceeding the Bank´s share of the net fair value of identifiable assets and liabilities of the investee is recognized as goodwill and it is included in the carrying amount of the investment and it is not amortized. When necessary, the entire carrying amount of the investment (including goodwill) is tested for impairment as a single asset in accordance with IAS 36 Impairment of Assets Impairment losses are recognized in net income and are calculated as the difference between the recoverable amount of the associate or joint venture, using the higher of its value in use and its fair value less costs of disposal, and its carrying value. The results and assets and liabilities of associates or joint ventures are incorporated in the consolidated financial statements using the equity method of accounting, except when the investment, or a portion thereof, is classified as held for sale, in which case it is accounted for in accordance with IFRS 5. When an investment in an associate or joint venture is held by, or is held indirectly through, an entity that is a venture capital organization, or a mutual fund, unit trust or similar entities, and such investment is measured at fair value through profit or loss in that entity, the Bank may elect to measure investments in those associates and joint ventures at fair value through profit or loss in the consolidated financial statements. This election is applied on an investment by investment basis. Under the equity method, the investment is initially recorded at cost and adjusted thereafter to recognize the Bank’s share of the profits or loss and other comprehensive income of the associate or join venture. When the Bank's share of losses of an associate or joint venture exceeds the Bank's interest in that associate or joint venture (which includes any long-term interests that, in substance, form part of the Bank's net investment in the associate or joint venture), the Bank discontinues recognizing its share of further losses. Additional losses are recognized only to the extent that the Bank has incurred legal or constructive obligations or made payments on behalf of the associate or joint venture. When the equity method is applicable, adjustments are considered in order to adopt uniform accounting policies of the associate or joint venture with the Bank. The portion that corresponds to the Bank for changes in the investee´s other comprehensive income items is recognized in the consolidated statement of comprehensive income as “Unrealized gain/(loss) on investments in associates and joint ventures using equity method” and gains or losses of the associate or joint venture are recognized in the consolidated statement of income as “Dividends received and share of profits of equity method investees”, in accordance with the Bank's participation. Gains and losses resulting from transactions between the Bank and its associate or joint venture are recognized in the Bank´s consolidated financial statements only to the extent of unrelated investor´s interest in the associate or joint venture. The equity method is applied from the acquisition date until the significant influence or joint control over the entity is lost. The unrealized gain or loss of an associate or joint venture is presented in the consolidated statement of comprehensive income, net of tax. Changes in the investment´s participation that arise from changes in other comprehensive income of an associate or joint venture are recognized directly in the investor’s statement of other comprehensive income. The dividends received from the associate or joint venture reduce the investment carrying value. When the significant influence on the associate or the joint venture is lost, the Bank measures and recognizes any residual investment that remained at its fair value. The difference between the associate or joint venture carrying value (taking into account the relevant items of other comprehensive income), the fair value of the retained residual investment and any proceeds from disposing of a part interest in the associate or joint venture, is recognized in the of income. The currency translation adjustments recognized in equity are reclassified to net income at the moment of disposal. For further informacion please see note 7. 4. Joint operations A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement have rights to the assets, and obligations for the liabilities, relating to the arrangement. The Bank recognizes and measures assets, liabilities, revenues and expenses in relation to its interest in joint operations in accordance with the applicable IFRS for the particular assets, liabilities, revenues and expenses. If the Bank acquires an interest in a joint operation in which the activity constitutes a business, as defined in IFRS 3 Business Combinations or when an existing business is contributed to the joint operation on its formation by one of the parties that participate in the joint operation, the Bank will apply all of the principles of IFRS 3 Business Combinations. In this case the Bank recognizes goodwill in the event that consideration transferred exceeds the net of the acquisition date amounts of the identifiable assets acquired and the liabilities assumed. Goodwill is tested for impairment at least annually. When the Bank transacts with a joint operation in which the Parent Company or its subsidiaries is a joint operator (such as a sale or contribution of assets), the Bank is considered to be conducting the transaction with the other parties to the joint operation, and gains and losses resulting from the transactions are recognized in the Bank’s consolidated financial statements only to the extent of other parties’ interests in the joint operation. When the Bank transacts with a joint operation in which the Parent Company or its subsidiaries is a joint operator (such as a purchase of assets), the Bank does not recognize its share of the gains and losses until it resells those assets to a third party. 5. Funds administration The Bank manages assets held in mutual funds and other forms of investment. Assets managed by the Bank’s subsidiaries and owned by third parties are not included in the consolidated financial statements unless control exists as structured entities. The Bank consolidates the following funds: Name Country % of ownership interest held by the Bank, 2018 % of ownership interest held by the Bank, 2017 % of ownership interest held by the Bank, 2016 Assets managed December 2018 December 2017 FCP Fondo Colombia Inmobiliario Colombia 51.29% 63.47% 62.55% 3,205,133 2,698,224 Fideicomiso “lote Abelardo Castro” Colombia 67.39% 68.23% 68.23% 11,616 10,343 Suvalor Panamá Fondo de Inversión Panamá 100.00% 100.00% 100.00% 244 224 Fondo de Inversión en Arrendamiento Operativo Renting Perú Perú - 100.00% 100.00% - - For all the aforementioned funds, the Bank has participated in the design of the structured entity, establishes operating and financial decisions of the funds and it is exposed to variable returns such as dividends or returns paid in quarterly installments. The commissions earned by the management of funds that are not consolidated are included in the statement of income as “Fees and commissions income”. 6. Non-controlling interest Non-controlling interests in the net assets of consolidated subsidiaries are presented separately within the Bank’s equity. Similarly, net income and other comprehensive income are also attributed to non-controlling interest and equity holders of the Parent Company. The amount of non-controlling interest may be initially measured either at fair value or at the non-controlling interest’s proportionate share of the acquiree’s identifiable net assets. The option for recognition is made on an investment by investment basis. Any purchase or sale of shares in subsidiaries that does not imply a loss or gain of control is directly recognized in equity. 6.1. Significant non-controlling interest FCP Colombia Inmobiliario As of December 31, 2018, and 2017, the portion of non-controlling interest in the FCP Colombia Inmobiliario was 48,71% and 36,53%, respectively, which is considered as a significant non-controlling interest for the Bank and its subsidiaries. The principal place of business of FCP Colombia Inmobiliario is Bogotá (Colombia). As of December 31, 2018, and 2017, there were no dividends declared by this subsidiary. In contrast, there were returns paid in quarterly installments due to the nature of its business, which mainly comprises long- term investment in real state, considered as low-risk portfolio. The following table summarizes the assets, liabilities, net assets, net income and cash flows as of December 31, 2018, 2017 and 2016, related to the FCP Colombia Inmobiliario: December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Assets 3,205,133 2,698,224 2,009,382 Liabilities 963,841 1,048,867 655,315 Net assets 2,241,292 1,649,357 1,354,067 Condensed statement of income Income Valuation of investment properties 70,933 81,816 52,543 Valuation of trust rights 29,161 53,143 12,903 Rents 147,324 135,135 120,811 Profits of equity method investees 96,201 144,146 - Other income 6,940 4,493 2,616 Total Income 350,559 418,733 188,873 Expenses Interest on loans 67,593 68,900 67,558 Trust fees 554 322 9,004 Other expenses 121,162 86,270 49,078 Total Expenses 189,309 155,492 125,640 Net Income 161,250 263,241 63,233 Condensed cash flow Net cash (used in) provided by operating activities (351) (394) (372) Net cash (used in) provided by investing activities - - - Net cash (used in) provided by financing activities 334 409 375 Cash and cash equivalents at beginning of year 18 3 - Cash and cash equivalents at end of year 1 18 3 The information above are the amounts before inter-company eliminations. As of December 31, 2018, 2017 and 2016, the profit allocated to non-controlling interest amounted to COP 78,570, COP 96,179 and COP 23,701, respectively. As of December 31, 2018, 2017 and 2016, the accumulated non-controlling interest of the FCP Colombia Inmobiliario amounted to COP 1,091,802, COP 602,548 and COP 507,115, respectively. Grupo Agromercantil Holding S.A. As of December 30, 2018, the portion of ownership in Grupo Agromercantil Holding by the non-controlling interest was 40.00%, which is considered as a significant non-controlling interest for the Bank and its subsidiaries. Guatemala is the principal place of business of GAH and its subsidiaries. The following table summarizes the assets, liabilities, net assets, net income and cash flows as of December 31, 2018, 2017 and 2016 of GAH. December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Assets 13,556,250 12,191,869 11,795,358 Liabilities 12,209,984 10,847,895 10,477,427 Equity 1,346,266 1,343,974 1,317,931 Condensed statement of income Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off-balance sheet credit instruments 388,932 389,463 393,972 Total fees and commission, net 111,932 101,565 58,745 Other operating income 52,286 54,246 55,942 Dividends received and equity method 579 608 779 Total operating income, net 553,729 545,882 509,438 Operating expenses (458,277) (445,038) (435,430) Income tax (15,910) (21,546) (11,197) Net income 79,542 79,298 62,811 Condensed cash flow Net cash (used in) provided by operating activities (66,235) 192,850 (136,878) Net cash (used in) provided by investing activities 244,949 (1,427) (4,157) Net cash (used in) provided by financing activities (2,983) (87,103) (77,684) Cash and cash equivalents at beginning of year 1,324,893 1,098,861 1,359,176 Cash and cash equivalents at end of year 1,500,624 1,203,181 1,140,457 Other comprehensive income Investments at fair value through OCI (6,598) 2,241 3,682 Translation adjustment 43,803 15,758 (64,195) Others (3,922) (3,042) 6,959 Total other comprehensive income 33,283 14,957 (53,554) For the year 2018, 2017 and 2016, the dividends received from Grupo Agromercantil amounted to COP 50,341, COP 39,482 and COP 46,416, respectively. D. Significant Accounting Policies The significant accounting policies that the Bank uses in preparing its consolidated financial statements are detailed below: 1. Functional and presentation currency Items included in the financial statements of each of the Bank’s entities are measured using the currency of the primary economic environment in which the entity operates (‘the functional currency’). The consolidated financial statements are presented in Colombian pesos, which is the functional currency for the Parent Company, and the presentation currency for the consolidated financial statements. All transactions and balances in other currency than pesos are considered as foreign currency. 2. Transactions and balances in foreign currency Foreign currency transactions are translated into the functional currency using the exchange rates at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities denominated in foreign currencies at period end exchange rates are generally recognized in net income. They are deferred in equity if they relate to qualifying cash flow hedges and qualifying net investment hedges or are attributable to part of the net investment in a foreign operation. Non-monetary items that are measured at cost are held at the exchange rate at the transaction date, while those which are measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value was determined. When a gain or loss on a non-monetary item is recognized in Stament of other comprehensive income, any exchange component of that gain or loss is recognized in other comprehensive income. Conversely, when a gain or loss on a non-monetary item is recognized in net income, any exchange component of that gain or loss shall be recognized in net income. 3. Foreign subsidiaries The results and financial position of foreign operations (none of which has the currency of a hyperinflationary economy) that have a functional currency different from the Bank´s presentation currency are translated into the presentation currency as follows:  Assets and liabilities for each statement of financial position presented are translated at the closing rate at the date of that statement of financial position  Income and expenses for each statement of income and statement of other comprehensive income are translated at average exchange rates, and  All resulting exchange differences are recognized in other comprehensive income in Translation adjustment reserve. As part of the consolidation process, exchange differences arising from debt securities in issue and the portion of other financial securities designated as hedges of foreign operations that are determined to be an effective hedge, are recognized in other comprehensive income in Translation adjustment reserve. When a foreign operation is sold or any debt securities in issue forming part of the net investment are repaid, the associated exchange differences are reclassified to net income, as part of the gain or loss on sale. Goodwill and fair value adjustments arising on the acquisition of a foreign operation are treated as assets and liabilities of the foreign operation and translated at the closing exchange rate. The table below sets forth the exchange rate used by the Bank and its subsidiaries to convert statement of financial position accounts and transactions in U.S. dollar into Colombian pesos: December 31, 2018 December 31, 2017 December 31, 2016 Closing exchange rate 3,249.75 2,984.00 3,000.71 Average rate for the period ended at 2,956.55 2,951.21 3,053.20 4. Cash and cash equivalents The Bank considers cash and cash equivalents to include cash and balances at central bank, interbank assets and reverse repurchase agreements and other similar secured lending that have original maturities up to 90 days, as shown in Note 4. 5. Security deposits. Security deposits are assets pledged as collateral that correspond to cash guarantees made by the Bank to other financial institutions. The carrying amount is increased when a margin call is issued or when it is necessary to increase the trading quota; conversely, it is decreased when the aim is to lower that quota. The security deposits are recognized as other assets in the consolidated statement of financial position at the amount paid in favor of the counterpart and these assets are not subject to interest recognition. 6. Business combinations and goodwill Business combinations are those transactions where an acquirer obtains control of a business (e.g. an acquisition or merger). Business combinations are accounted for using the acquisition method as follows: a) Identifiable acquired assets, liabilities and contingent liabilities assumed in the acquisition are recognized at fair value at the date of acquisition; b) Acquisition costs are recognized in the consolidated statement of income as expenses in the periods in which the costs are incurred and the services are received; c) and goodwill is recognized as an asset in the consolidated statement of financial position or a gain from a bargain purchase. The consideration transferred for the acquisition of a subsidiary is the fair value of the assets transferred, the liabilities incurred to the former owners of the acquiree and the equity interests issued by the Bank (If any). Goodwill is measured as the excess of the sum of the consideration transferred, the value of any non-controlled interest and, when applicable, the fair value of any previous equity interest in the acquiree, over the net fair value of the acquired assets, liabilities or contingent liabilities assumed at the date of acquisition. For each business combination, at the date of acquisition, the Bank measures the non-controlling interest by the proportional share of the identifiable assets acquired, as well as liabilities and contingent liabilities assumed by the acquired company, or by their fair value. Any contingent consideration in a business combination is classified as a liability or as equity and is recognized at fair value at the date of acquisition, the liability is remeasured at subsequent reporting dates in accordance with IAS 37, Provisions, Contingent Liabilities and Contingent Assets, and the consideration classified as equity is not remeasured at subsequent reporting dates and its subsequent settlement is accounted for within equity. The goodwill acquired in a business combination is allocated, at the date of acquisition, to the Bank's cash-generating units (or group of cash generating units) which are expected to benefit from the combination, regardless of whether other assets or liabilities of the acquiree are assigned to those units or group of units. For business combinations achieved in stages, any previous equity interest held by the Bank in the acquiree is remeasured at its fair value at the date of acquisition and any resulting gain (or loss) is reported in the consolidated statement of income or other comprehensive income, as appropriate. Amounts previously recognized in other comprehensive income that must be recycle

OPERATING SEGMENTS

OPERATING SEGMENTS	12 Months Ended
	Dec. 31, 2018
Disclosure Of Operating Segment [Abstract]
Disclosure of operating segments [text block]	NOTE 3. OPERATING SEGMENTS Operating segments are defined as components of an entity about which separate financial information is available and that is evaluated regularly by the chief operating decision maker (CODM) in deciding how to allocate resources and assessing performance; the CODM is constituted by the Bank’s President (CEO) and Financial Vicepresident (CFO). The segment information has been prepared following the Bank’s accounting policies as described in the summary of significant accounting policies in Note 2 Significant accounting policies and has been presented consistently with the internal reports provided to the CODM. The CODM uses a variety of information and key financial data on a segment basis to assess the performance and make decision regarding the investment and allocation of resources, such as:  Net interest margin (Net margin on financial instruments divided by average interest-earning assets).  Return on average total assets (Net income divided by average total assets).  Return on average stockholders’ equity.  Efficiency ratio (Operating expenses as a percentage of interest, fees, services and other operating income).  Asset Quality and loans coverage ratios. The Bank includes the following segments: Banking Colombia, Banking Panama, Banking El Salvador, Banking Guatemala, Trust, Investment Banking, Brokerage, Off Shore and All other segments. The factors used to identify the Bank’s reportable segments are the nature of the products and services provided by the subsidiaries and the geographical locations where the subsidiaries are domiciled, in line with the CODM’s operating decisions related to the results of each segment. The Bank’s operating segments are comprised as follows:  Banking Colombia This segment provides retail and corporate banking products and services to individuals, companies and national and local governments in Colombia. The Bank’s strategy in Colombia is to grow with these clients based on value added and long-term relationships. In order to offer specialized services to individuals and small and medium size enterprises (SMEs), the Bank´s retail sales force targets the clients classified as: Personal, Private, Entrepreneurs, Foreign Residents and SMEs. The Bank´s corporate and government sales force targets and specializes in companies with more than COP 20,000 million in revenue in nine economic sectors: Agribusiness, Commerce, Manufacturing of Supplies and Materials, Media, Financial Services, Non-Financial Services, Construction, Government and Natural Resources. Tuya S.A. was discontinued in the year ending as of December 31, 2016. For more detail, see Note 30 Discontinued operations. This segment is also responsible for the management of the Bank’s proprietary trading activities, liquidity and distribution of treasury products and services to its client base in Colombia.  Banking Panama This segment provides retail and commercial banking products and services to individuals and companies in Panama through the Banistmo operation. This segment includes all the operations of Banistmo and its subsidiaries, which are managed and monitored by the CODM on a consolidated basis. This segment is also responsible for the management of the Banistmo’s proprietary trading activities, liquidity and distribution of treasury products and services to its client base in Panama.  Banking El Salvador This segment provides retail and commercial banking products and services to individuals, companies and national and local governments in El Salvador through Banco Agrícola S.A. Banking El Salvador also includes operations of the following subsidiaries: Arrendadora Financiera S.A., Credibac S.A. de CV, Valores Banagricola S.A. de C.V. This segment is also responsible for the management of Banco Agrícola’s proprietary trading activities, liquidity and distribution of treasury products and services to its client base in El Salvador.  Banking Guatemala This segment provides retail and commercial banking and insurance products and services to individuals, companies and national and local governments in Guatemala through Banco Agromercantil de Guatemala S.A. Banking Guatemala also includes operations of the following subsidiaries: Mercom Bank Ltd., Seguros Agromercantil S.A., Financiera Agromercantil S.A., Agrovalores S.A., Arrendadora Agromercantil S.A., Agencia de Seguros y Fianzas Agromercantil S.A., Asistencia y Ajustes S.A., Serproba S.A., Servicios de Formalización S.A., Conserjería, Mantenimiento y Mensajería S.A. and New Alma Enterprises LTD. This segment is also responsible for the management of Banco Agromercantil’s proprietary trading activities, liquidity and distribution of treasury products and services to its client base in Guatemala.  Trust This segment provides trust and asset management services to clients in Colombia and Peru through Fiduciaria Bancolombia S.A. Sociedad Fiduciaria and FiduPerú S.A. Sociedad Fiduciaria (in winding up process). The main products offered by this segment include money market accounts, mutual and pension funds, private equity funds, payment trust, custody services, and corporate trust. Investment in FiduPerú S.A. was classified as Asset held for sale in the Consolidated Statement of Financial Position as of December 31, 2018. The Bank started in 2018 a process of winding up for this investment located in Peru. For further information, see Note 12 Assets held for sale and inventories.  Investment banking This segment provides corporate and project finance advisory, underwriting, capital markets services and private equity management through Banca de Inversión Bancolombia S.A. Corporación Financiera. Its customers include private and publicly-held corporations as well as government institutions.  Brokerage This segment provides brokerage, investment advisory and private banking services to individuals and institutions through Valores Bancolombia S.A. Comisionista de Bolsa. It sells and distributes equities, futures, foreign currencies, fixed income securities, mutual funds and structured products.  Off Shore This segment provides a complete line of offshore banking services to Colombian and foreign customers through Bancolombia Panamá S.A., Bancolombia Caymán S.A., and Bancolombia Puerto Rico International, Inc. It offers loans to private sector companies, trade financing, leases financing and financing for industrial projects, as well as a complete portfolio of cash management products, such as checking accounts, international collections and payments. Through these subsidiaries, the Bank also offers investment opportunities in U.S. dollars, savings and checking accounts, time deposits, and investment funds to its high net worth clients and private banking customers.  All other segments This segment provides financial and operational leases activities, including cross-border and international leasing services to clients in Colombia, Central America and Mexico. Bancolombia offers these services mainly through the following Subsidiaries: Renting Colombia S.A.S., Arrendamiento Operativo CIB S.A.C. and Transportempo S.A.S. This segment also includes results from the operations of investment vehicles of the Bank: Valores Simesa S.A., BIBA Inmobiliaria S.A.S., Inversiones CFNS S.A.S., Sistema de Inversiones y Negocios S.A. Sinesa, Banagrícola S.A., Inversiones Financieras Banco Agrícola and others. According to the quantitative threshold test required by IFRS 8 Operating Segments, the revenue reported by “all other segments” is less than 10 per cent of the combined revenue of all operating segments and its assets represent less than 10 per cent of all operating segments combined assets of the Bank. The investment in Arrendamiento Operativo CIB S.A.C. is classified as Asset held for sale in Statement of Financial Position. For further information, see Note 12 Assets held for sale and inventories. Financial performance by operating segment: The CODM reviews the performance of the Bank using the following financial information by operating segment: For the year ended December 31, 2018 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation (2) Total after eliminations In millions of COP Total interest and valuation 12,215,644 1,573,928 931,405 894,934 404 22 24,273 547,878 14,737 16,203,225 (86,725) 16,116,500 Interest income on loans and financial leases 11,990,678 1,449,441 861,174 821,276 - - - 434,754 9,049 15,566,372 52 15,566,424 Total Debt investments 366,354 101,599 25,081 72,896 105 22 14,728 20,559 32 601,376 (2) 601,374 Derivatives (17,023) (13,250) - - - - 7,694 86,779 - 64,200 (86,775) (22,575) Total liquidity operations (124,365) 36,138 45,150 762 299 - 1,851 5,786 5,656 (28,723) - (28,723) Interest expenses (4,194,772) (558,126) (252,351) (360,988) (39) - (15) (247,666) (56,259) (5,670,216) - (5,670,216) Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments 8,020,872 1,015,802 679,054 533,946 365 22 24,258 300,212 (41,522) 10,533,009 (86,725) 10,446,284 Total credit impairment charges, net (3,354,330) (269,164) (94,301) (136,289) (826) (135) 155 19,039 (7,221) (3,843,072) - (3,843,072) Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments 4,666,542 746,638 584,753 397,657 (461) (113) 24,413 319,251 (48,743) 6,689,937 (86,725) 6,603,212 Revenues (Expenses) from transactions with other operating segments of the Bank (6,986) (30,634) (2,029) (7,574) (32,509) 20,187 55,843 98,987 (95,285) - - - Fees and commission income (3) 2,841,302 312,762 227,114 141,253 313,908 20,271 113,970 20,840 2,988 3,994,408 (149) 3,994,259 Fees and commission expenses (1,009,573) (120,520) (43,216) (29,320) (2,380) (46) (2,734) (3,408) (1,859) (1,213,056) - (1,213,056) Total fees and commission income, net 1,831,729 192,242 183,898 111,933 311,528 20,225 111,236 17,432 1,129 2,781,352 (149) 2,781,203 Other operating income 250,598 39,781 4,842 52,287 19,826 965 (10,468) 15,668 912,738 1,286,237 (82,435) 1,203,802 Dividends received, and share of profits of equity method investees (49,316) 4,240 1,894 580 18,572 (67,990) (12,416) (270,523) (34,485) (409,444) 751,239 341,795 Recovery (Impairment) charges on cash-generating unit - - - - - 173,339 (1) - - (4,583) 168,756 - 168,756 Total operating income, net 6,692,567 952,267 773,358 554,883 316,956 146,613 168,608 180,815 730,771 10,516,838 581,930 11,098,768 Operating expenses (4) (4,902,500) (554,890) (402,831) (373,279) (111,614) (24,110) (98,687) (53,313) (467,770) (6,988,994) (2) (6,988,996) Impairment, depreciation and amortization (177,779) (55,127) (26,122) (84,996) (588) (131) (1,402) (2,072) (144,722) (492,939) (963) (493,902) Total operating expenses (5,080,279) (610,017) (428,953) (458,275) (112,202) (24,241) (100,089) (55,385) (612,492) (7,481,933) (965) (7,482,898) Profit before tax 1,612,288 342,250 344,405 96,608 204,754 122,372 68,519 125,430 118,279 3,034,905 580,965 3,615,870 (1) Includes imparment recovery in joint venture Compañía de Financiamiento Tuya S.A. For more information see Note 7 Investments in associates and joint ventures (2) Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM. (3) For further information about income from contracts with customers, see note 24.3. Fees and commissions. (4) Includes staff costs, other administration and general expenses, contributions and other tax burdens and others. For the year ended December 31, 2017 (5) Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation (2) Total after eliminations In millions of COP Total interest and valuation 12,995,017 1,495,446 882,806 865,038 794 94 8,916 444,649 10,201 16,702,961 (6,568) 16,696,393 Interest income on loans and financial leases 12,586,875 1,374,398 830,050 767,986 - - - 412,418 13,000 15,984,727 (426) 15,984,301 Total Debt investments 602,304 93,154 31,582 100,193 193 94 15,147 16,329 735 859,731 - 859,731 Derivatives (54,156) 438 - - - - (7,661) 6,085 (289) (55,583) (6,084) (61,667) Total liquidity operations (140,006) 27,456 21,174 (3,141) 601 - 1,430 9,817 (3,245) (85,914) (58) (85,972) Interest expenses (4,791,976) (523,312) (256,994) (348,726) (102) - (72) (226,304) (85,928) (6,233,414) 428 (6,232,986) Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments 8,203,041 972,134 625,812 516,312 692 94 8,844 218,345 (75,727) 10,469,547 (6,140) 10,463,407 Total credit impairment charges, net (3,195,837) (46,468) (110,018) (125,877) (549) 466 (147) 6,541 1,696 (3,470,193) 8,576 (3,461,617) Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments 5,007,204 925,666 515,794 390,435 143 560 8,697 224,886 (74,031) 6,999,354 2,436 7,001,790 Revenues (Expenses) from transactions with other operating segments of the Bank (59,884) (26,837) (963) (972) (33,024) 16,209 53,075 101,327 (48,931) - - - Fees and commission income (3) 2,531,221 317,753 211,159 126,022 285,648 28,747 97,185 19,390 3,989 3,621,114 - 3,621,114 Fees and commission expenses (889,481) (112,986) (40,325) (24,457) (1,982) (52) (482) (2,874) (2,476) (1,075,115) - (1,075,115) Total fees and commission income, net 1,641,740 204,767 170,834 101,565 283,666 28,695 96,703 16,516 1,513 2,545,999 - 2,545,999 Other operating income 608,025 8,662 (7,799) 54,246 13,560 1,886 (11,647) 6,428 885,182 1,558,543 19,666 1,578,209 Dividends received, and share of profits of equity method investees (53,141) 7,038 324 608 18,249 (70,114) 12,278 (239,328) (61,156) (385,242) 651,412 266,170 Recovery (Impairment) charges on cash-generating unit - - - - - (173,339) (1) - - - (173,339) - (173,339) Total operating income, net 7,143,944 1,119,296 678,190 545,882 282,594 (196,103) 159,106 109,829 702,577 10,545,315 673,514 11,218,829 Operating expenses (4) (4,715,976) (569,219) (383,002) (343,646) (113,482) (34,100) (101,255) (56,593) (430,212) (6,747,485) 538 (6,746,947) Impairment, depreciation and amortization (147,262) (55,197) (34,671) (101,392) (540) (133) (1,398) (967) (137,377) (478,937) (174) (479,111) Total operating expenses (4,863,238) (624,416) (417,673) (445,038) (114,022) (34,233) (102,653) (57,560) (567,589) (7,226,422) 364 (7,226,058) Profit before tax 2,280,706 494,880 260,517 100,844 168,572 (230,336) 56,453 52,269 134,988 3,318,893 673,878 3,992,771 (1) Includes imparment recognition in joint venture Compañía de Financiamiento Tuya S.A. For more information see Note 7 Investments in associates and joint ventures (2) Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM. (3) For further information about income from contracts with customers, see Note 24.3. Fees and commissions. (4) Includes staff costs, other administration and general expenses, contributions and other tax burdens and others. (5) Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards. For the year ended December 31, 2016 (4) Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation (1) Total after eliminations In millions of COP Total interest and valuation 11,586,785 1,399,852 901,757 869,329 827 136 17,160 442,107 30,299 15,248,252 500,553 15,748,805 Interest income on loans and financial leases 11,196,951 1,284,986 844,687 763,031 - - - 431,381 25,819 14,546,855 473,487 15,020,342 Total Debt investments 464,504 94,284 48,264 96,081 283 136 18,094 16,205 3,145 740,996 1,718 742,714 Derivatives (10,197) 3,274 - 5,323 - - (2,113) (7) (1,030) (4,750) - (4,750) Total liquidity operations (64,473) 17,308 8,806 4,894 544 - 1,179 (5,472) 2,365 (34,849) 25,348 (9,501) Interest expenses (4,542,701) (457,611) (252,011) (348,219) (20) - (33) (252,030) (99,991) (5,952,616) (100,484) (6,053,100) Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments 7,044,084 942,241 649,746 521,110 807 136 17,127 190,077 (69,692) 9,295,636 400,069 9,695,705 Total credit impairment charges, net (1,797,848) (367,781) (55,985) (127,839) (164) (423) (25) (52,294) 871 (2,401,488) (329,664) (2,731,152) Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments 5,246,236 574,460 593,761 393,271 643 (287) 17,102 137,783 (68,821) 6,894,148 70,405 6,964,553 Revenues (Expenses) from transactions with other operating segments of the Bank (65,915) (20,600) (3,054) 701 (22,893) 12,891 38,677 99,914 (39,721) - - - Fees and commission income (3) 2,063,018 291,853 203,623 81,737 239,610 19,843 80,571 30,263 1,699 3,012,217 287,716 3,299,933 Fees and commission expenses (767,655) (111,590) (45,361) (22,992) (865) (22) (511) (3,253) (1,526) (953,775) (15,195) (968,970) Total fees and commission income, net 1,295,363 180,263 158,262 58,745 238,745 19,821 80,060 27,010 173 2,058,442 272,521 2,330,963 Other operating income 569,326 18,851 1,302 55,942 13,500 2,285 (9,923) 16,453 888,529 1,556,265 (89,610) 1,466,655 Dividends received, and share of profits of equity method investees (264,715) 4,692 711 779 16,873 202,062 32,567 (269,096) (175,595) (451,722) 628,414 176,692 Total operating income, net 6,780,295 757,666 750,982 509,438 246,868 236,772 158,483 12,064 604,565 10,057,133 881,730 10,938,863 Operating expenses (3) (4,142,515) (589,535) (390,309) (323,001) (87,951) (26,662) (110,317) (60,688) (400,243) (6,131,221) (321,551) (6,452,772) Impairment, depreciation and amortization (147,261) (62,459) (50,323) (112,429) (612) (93) (1,980) (972) (137,672) (513,801) (4,008) (517,809) Total operating expenses (4,289,776) (651,994) (440,632) (435,430) (88,563) (26,755) (112,297) (61,660) (537,915) (6,645,022) (325,559) (6,970,581) Profit before tax 2,490,519 105,672 310,350 74,008 158,305 210,017 46,186 (49,596) 66,650 3,412,111 556,171 3,968,282 (1) Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM. (2) For further information about income from contracts with customers, see note 24.3. Fees and commissions. (3) Includes staff costs, other administration and general expenses, contributions and other tax burdens and others. (4) Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards. The following table presents financial information of the total assets and liabilities by operating segment: For the year ended December 31, 2018 In millions of COP Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation Total after eliminations Total assets 149,185,338 31,116,800 14,704,427 13,556,250 580,205 1,779,618 301,851 17,963,675 9,638,514 238,826,678 (18,713,060) 220,113,618 Total liabilities (132,722,635) (27,761,479) (12,963,237) (12,209,984) (86,524) (40,741) (57,765) (12,640,349) (2,336,273) (200,818,987) 7,360,594 (193,458,393) For the year ended December 31, 2017 In millions of COP Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation Total after eliminations Total assets 142,207,844 28,119,504 12,978,363 12,191,869 493,078 1,423,883 283,171 16,503,973 8,767,762 222,969,447 (19,061,236) 203,908,211 Total liabilities (125,534,492) (25,040,470) (11,318,266) (10,847,895) (80,904) (48,192) (56,789) (12,284,687) (2,300,511) (187,512,206) 8,033,545 (179,478,661) The following table presents financial information of the investments in associates and joint ventures by operating segment: For the year ended December 31, 2018 (1) Banking Colombia Banking El Salvador Trust Investment banking All other segments Total In millions of COP Investments in associates and joint ventures 313,081 13,544 230,211 451,113 1,141,630 2,149,579 Equity method 32,859 1,887 20,235 27,909 104,924 187,814 (1) As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures. For the year ended December 31, 2017 (1) Banking Colombia Banking El Salvador Trust Investment banking All other segments Total In millions of COP Investments in associates and joint ventures 305,187 10,532 226,761 248,156 774,423 1,565,059 Equity method 45,976 316 34,921 21,724 150,665 253,602 (1) As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures. For the year ended December 31, 2016 (1) Banking Colombia Banking El Salvador Trust Investment banking All other segments Total In millions of COP Equity method 34,425 702 26,128 (3,923) 2,922 60,254 (1) As of December 31, 2016, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures. For additional information related to investment in associates and joint ventures, see Note 7 Investments in associates and joint ventures. The following table presents material non-cash items other than depreciation and amortization by segment: For the year ended December 31, 2018 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total In millions of COP Restructured loans that were transferred to foreclosed assets 271,695 84,390 15,782 9,377 - - - 6,376 12,373 399,993 Provisions 3,679,839 342,528 145,661 153,484 826 135 (155) (17,973) 7,140 4,311,485 For the year ended December 31, 2017 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total In millions of COP Restructured loans that were transferred to foreclosed assets 163,274 39,486 16,191 7,157 - - - - 24,030 250,138 Provisions 3,422,531 165,651 162,877 138,297 548 (467) 147 (4,449) (5,576) 3,879,559 For the year ended December 31, 2016 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total In millions of COP Restructured loans that were transferred to foreclosed assets 130,892 44,484 35,466 95,891 - - - - 97,452 404,185 Provisions 2,130,261 381,531 104,864 127,370 164 423 (34) 48,977 5,565 2,799,121 Information about products and services The Bank does not report revenues from external customers for each product and service or each group of similar products and services, because the information is not available and the cost to develop it is excessive. Geographic information The following summarizes the Bank’s total interest and valuation and long-lived assets attributable to Colombia and other foreign countries based on the country where the interest and valuation was originated: 2018 2017 2016 Geographic information Interest and valuation Long-lived assets (1) Interest and valuation Long-lived assets (1) Interest and valuation Colombia 12,379,140 4,788,744 13,108,005 4,353,782 11,695,937 Panama 2,166,482 378,021 1,986,741 297,832 1,898,058 Puerto Rico 77,917 321 68,556 388 56,519 Peru (2) 253 165,076 658 115,840 15,753 El Salvador 932,444 296,040 883,538 280,562 902,371 Costa Rica - 131 - 80 - Guatemala 895,693 170,078 866,049 166,662 870,283 Total 16,451,929 5,798,411 16,913,547 5,215,146 15,438,921 Eliminations and translation adjustment (335,429) 6,533,616 (220,667) 5,999,471 309,884 Total, net 16,116,500 12,332,027 16,692,880 11,214,617 15,748,805 (1) Included foreclosed assets, premises and equipment, investment property and goodwill presented within Other assets in the Consolidated Statement of Financial Position. (2) Investments in FiduPerú and Arrendamiento Operativo CIB S.A.C. are classified as Asset held for sale in the Consolidated Statement of Financial Position. For further information, see Note 12 Assets held for sale and inventories.

CASH AND CASH EQUIVALENTS

CASH AND CASH EQUIVALENTS	12 Months Ended
	Dec. 31, 2018
Disclosure of cash and cash equivalents [Abstract]
Disclosure of restricted cash and cash equivalents [text block]	NOTE 4. CASH AND CASH EQUIVALENTS For purposes of the consolidated statement of cash flow and the consolidated statement of financial position, the following assets are considered as cash and cash equivalents: December 31, 2018 December 31, 2017 In millions of COP Cash and balances at central bank Cash 5,192,182 5,099,252 Due from central banks (1) 6,603,500 6,567,030 Due from other private financial entities 3,713,481 3,541,644 Checks on hold 216,323 141,370 Remittances of domestic negotiated checks in transit 107,531 173,827 Total cash and due from banks 15,833,017 15,523,123 Money market transactions Interbank borrowings 1,965,973 1,761,460 Reverse repurchase agreements and other similar secured loans 931,820 881,061 Total money market transactions 2,897,793 2,642,521 Total cash and cash equivalents 18,730,810 18,165,644 (1) According to External Resolution Number 005 of 2008 issued by the Colombian Central Bank, the Parent Company must maintain the equivalent of 4.50% of its customer’s deposits with a maturity term less than 18 months as a legal banking reserve, represented in deposits at the Central Bank or as cash in hand. In addition, according to Resolusion Number 177 of 2002 issued by the Guatemalian Monetary Board, Grupo Agromercantil Holding through its subsidiaria Banco Agromercantil de Guatemala must maintain the equivalent of 14.60% of its customer’s deposits daily balances as a legal banking reserve, represented in unrestricted deposits at the Bank of Guatemala. For its part, according to the norm of the banks Number 3-06 of 2000 issued by the Financial System Superintendency of El Salvador, Banco Agrícola must mantain an equivalent amount between 1.00% and 25.00% of its deposits and debt securities in issue average daily balances as a liquidity reserve, represented in unrestricted deposits or debt securities issued by El Salvador Central Bank. Finally, in accordance with the Agreement 004 of 2008 issued by the Superintendency of Banks of Panama, all Panamanian banks must maintain a minimum legal liquidity rate established at 30.00%. As of December 31, 2018 and 2017, there is restricted cash amounting to COP 253,546 and COP 192,036, respectively, included in other assets on the statement of financial position, see Note 13. Other assets, which represents margin deposits pledged as collateral for derivative contracts traded through clearing houses. As of December 31, 2018 and 2017, cash and cash equivalents held by FiduPerú S.A. Sociedad Fiduciaria COP 5,830 and COP 12,951, Arrendamiento Operativo CIB S.A.C COP 6,646 and COP 6,092, respectively and Capital Investment SAFI S.A. COP 29 for the year ended at December 31, 2017, were classified as assets held for sale. For further information, see Note 12. Assets held for sale and inventories.

FINANCIAL ASSETS INVESTMENTS AN

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES	12 Months Ended
	Dec. 31, 2018
Disclosure of financial assets investments and derivatives [Abstract]
Disclosure of financial instruments [text block]	NOTE 5. FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES 5.1 Financial assets investments The Bank’s securities portfolios at fair value through profit or loss, other comprehensive income and at amortized cost are listed below, as of December 31, 2018 and 2017: 2018 On January 1, 2018 the Bank adopted IFRS 9. Consequently, some debt securities have been reclassified from one portfolio to another or remeasured considering the Bank’s definition of its business model under IFRS 9. Debt instruments Measurement under IFRS 9 (2013) Measurement under IFRS 9 (2014) (1) Difference In millions of COP Fair value through profit or loss 10,701,855 8,777,923 (1,923,932) Amortized cost 4,157,568 3,121,981 (1,035,587) Transfer to Fair value through other comprehensive income - 2,991,352 2,991,352 Total debt instruments 14,859,423 14,891,256 31,833 (1) For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards. The detail of the carrying value of the financial assets investments is as follows as of December 31, 2018: Financial assets investments Measurement methodology Total carrying value Fair value through profit or loss Fair value through other comprehensive income Amortized cost In millions of COP Securities issued by the Colombian Government 7,242,168 - 50,243 7,292,411 Securities issued by foreign governments 817,639 3,143,488 272,073 4,233,200 Securities issued by government entities 43,846 - 1,875,260 1,919,106 Securities issued by other financial institutions (1) 661,176 186,250 143,750 991,176 Corporate bonds 145,032 - 1,140,602 1,285,634 Total debt instruments 8,909,861 3,329,738 3,481,928 15,721,527 Total equity securities 1,101,461 538,487 - 1,639,948 Total financial assets Investments 17,361,475 (1) Includes mortgage-backed securities (TIPS) measured at fair value through profit or loss amounting to COP 196,920 and amortized cost amounting to COP 7. For further information on TIPS’ fair value measurement see Note 29 fair value of assets and liabilities. 2017 As of December 31, 2017, the finalcial assets investments was classsifed according to IFRS 9 (2013). Financial assets investments Measurement methodology Total carrying value Fair value through profit or loss Amortized cost In millions of COP Securities issued by the Colombian Government 7,003,147 12,965 7,016,112 Securities issued by foreign governments 2,471,994 1,050,855 3,522,849 Securities issued by government entities 36,038 1,926,554 1,962,592 Securities issued by other financial institutions 1,052,776 225,431 1,278,207 Corporate bonds 137,900 941,763 1,079,663 Total debt instruments 10,701,855 4,157,568 14,859,423 Total equity securities 1,517,830 Total financial assets investments 16,377,253 The following tables set forth the debt instruments portfolio by maturity: As of December 31, 2018 Less than 1 year Between 1 and 3 years Between 3 and 5 years Greater than 5 years Total In millions of COP Securities at fair value through profit or loss Securities issued by the Colombian Government 2,376,212 2,142,086 884,248 1,839,622 7,242,168 Securities issued by foreign governments 511,149 25,165 55,041 226,284 817,639 Securities issued by government entities 27,905 10,488 109 5,344 43,846 Securities issued by other financial institutions 169,615 164,208 105,231 222,122 661,176 Corporate bonds 28,539 20,739 47,415 48,339 145,032 Subtotal 3,113,420 2,362,686 1,092,044 2,341,711 8,909,861 Fair value through other comprehensive income Securities issued by foreign governments 1,334,351 1,018,119 593,346 197,672 3,143,488 Securities issued by other financial institutions 5,807 - - 180,443 186,250 Subtotal (1) 1,340,158 1,018,119 593,346 378,115 3,329,738 Securities at amortized cost Securities issued by the Colombian Government 50,243 - - - 50,243 Securities issued by foreign governments 12,534 9,897 2,661 246,981 272,073 Securities issued by government entities 1,875,260 - - - 1,875,260 Securities issued by other financial institutions 85,366 23,650 34,734 - 143,750 Corporate bonds - 56,546 265,853 818,203 1,140,602 Subtotal 2,023,403 90,093 303,248 1,065,184 3,481,928 Total debt instruments 6,476,981 3,470,898 1,988,638 3,785,010 15,721,527 (1) For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies. As of December 31, 2017 Less than 1 year Between 1 and 3 years Between 3 and 5 years Greater than 5 years Total In millions of COP Securities at fair value through profit or loss Securities issued by the Colombian Government 2,163,682 3,299,116 1,164,689 375,660 7,003,147 Securities issued by foreign governments 962,640 408,586 736,105 364,663 2,471,994 Securities issued by government entities 11,134 14,825 6,946 3,133 36,038 Securities issued by other financial institutions 157,434 250,395 143,353 501,594 1,052,776 Corporate bonds 35,255 16,027 21,419 65,199 137,900 Subtotal 3,330,145 3,988,949 2,072,512 1,310,249 10,701,855 Securities at amortized cost Securities issued by the Colombia Government - 12,965 - - 12,965 Securities issued by foreign governments 241,944 184,454 415,229 209,228 1,050,855 Securities issued by government entities 1,909,363 17,191 - - 1,926,554 Securities issued by other financial institutions 117,075 68,166 40,190 - 225,431 Corporate bonds 26,668 15,945 148,684 750,466 941,763 Subtotal 2,295,050 298,721 604,103 959,694 4,157,568 Total debt instruments 5,625,195 4,287,670 2,676,615 2,269,943 14,859,423 For further information related to disclosures of the fair value of securities, please see Note 29 Fair value of assets and liabilities. The following table shows the fair value of equity securities: Equity securities Carrying amount December 31, 2018 December 31, 2017 In millions of COP Total of securities at fair value through profit or loss (1) 1,101,461 988,455 Total of securities at fair value through OCI 538,487 529,375 Total equity securities 1,639,948 1,517,830 (1) The growth is mainly due to the increase of the Sura Assets Management fair value by COP 69,162 at the end of the year 2018. In accordance with the price conditions agreed with Caisse de Dépôt et Placement du Québec (CDPQ) for the sale of this investment, the total Bank’s shareholding will be sold for (USD 135,173) COP 439,279. The investment securities held by Capital Investment SAFI S.A. y FiduPerú S.A. were considered as assets held for sale at December 31, 2017, amounting to COP 1,345. At December 31, 2018, there are not investment securities considered as investments held for sale. For further information, see Note 12 Assets held for sale and inventories. The Bank has recognized in the consolidated statement of comprehensive income COP 33,838 in 2018, COP 77,304 in 2017 and COP 275,031 in 2016 related to equity securities and trust funds at fair value through OCI. See Consolidated Statement of Comprehensive Income Equity securities that have been designated to be measured at fair value through OCI are considered strategic for the Bank and, thus, there is no intention to sell them in the foreseeable future and that is the main reason for using this presentation alternative. The following table details the equity instruments designated at fair value through other comprehensive income analyzed by listing status: Equity securities Carrying amount December 31, 2018 December 31, 2017 In millions of COP Securities at fair value through OCI : Equity securities listed in Colombia 71,626 76,178 Equity securities listed elsewhere 5,319 5,766 Equity securities unlisted: TELERED 100,126 82,384 Asociación Gremial de Instituciones Financieras Credibanco S.A. 84,807 85,342 CIFI 23,663 29,922 Compañía De Procesamiento de Medios de Pago Guatemala(Bahamas), S. A. 17,408 11,009 Transacciones y Transferencias, S. A. 6,424 5,059 CADENALCO 2,964 5,782 Deceval (1) - 22,024 Others 226,150 205,909 Total equity securities at fair value through OCI 538,487 529,375 (1) Between 2018 and 2017 Deceval was totally sold for COP 21,444 due to the merger between Bolsa de Valores de Colombia (BVC) and Deceval. This transaction transferred from OCI to retained earnings the amount of COP 20,644. During 2018, 2017 and 2016 no impairment loss was recognized on equity securities. Dividends received from equity investments at fair value through OCI held as of December 31, 2018, 2017 and 2016 amounted to COP 13,105, COP 11,951 and COP 9,317, respectively. See Note 24.5 Dividends received, and share of profits of equity method investees. Equity investments do not have a specific maturity date; therefore, they are not included in the maturity detail. The detail of the securities pledged as collateral as of December 31, 2018 and 2017 is as follows: As of December 31, 2018 Pledged financial assets Term Security pledged Carrying amount In millions of COP Investments pledged as collateral in money market Equity securities listed in stock market Less than 3 months Stocks 2,855 Securities issued by the Colombian Government Less than 3 months TES-Treasury instruments 264,292 Securities issued by the Colombian Government Between 3 and 6 months TES-Treasury instruments 67,658 Securities issued by the Colombian Government Between 6 and 12 months TES-Treasury instruments 713,974 Securities issued by the Colombian Government Greater 12 months TES-Treasury instruments 1,131,623 Securities issued by foreign governments Greater 12 months Bonds 285,463 Securities issued by other financial institutions Greater 12 months CDT 181,951 Subtotal investments pledged as collateral in money market 2,647,816 Investments pledged as collateral in derivative operations Equity securities listed in stock market Less than 3 months Stocks 91 Securities issued by the Colombian Government Between 3 and 6 months TES - Treasury instruments 1,353 Securities issued by the Colombian Government Between 6 and 12 months TES - Treasury instruments 168,375 Securities issued by the Colombian Government Greater 12 months TES - Treasury instruments 10,182 Subtotal investments pledged as collateral in derivative operations 180,001 Total securities pledged as collateral 2,827,817 As of December 31, 2017 Pledged financial assets Term Security pledged Carrying amount In millions of COP Investments pledged as collateral in repo operations Securities issued by the Colombian Government Greater twelve months TES - Treasury instruments 1,744,736 Securities issued by the Colombian Government Between six and twelve months TES - Treasury instruments 877,673 Subtotal investments pledged as collateral in repo operations 2,622,409 Investments pledged as collateral in derivative operations Securities issued by the Colombian Government Between six and twelve months TES - Treasury instruments 78,688 Securities issued by the Colombian Government Greater twelve months TES - Treasury instruments 40,247 Subtotal investments pledged as collateral in derivative operations 118,935 Total securities pledged as collateral 2,741,344 The Bank has adopted IFRS 9 on January 1, 2018. Consequently, the following tabular information is only disclosed for the year ending on December 31, 2018. The following table shows the breakdown of the changes in the gross carrying amount of the debt securities at Fair value through other comprehensive income and Amortized cost, in order to explain their significance to the changes in the loss allowance for the same portfolio as discussed above: Debt instruments portfolio measure at fair value through OCI and amortized cost Stage 1 Stage 2 Total In millions of COP Gross carrying amount as at 1 January 2018 (1) 5,673,059 440,273 6,113,332 Transfers: Transfer from Stage 2 to Stage 1 153,447 (153,447) - Change in measurement (2) 130,671 - 130,671 Financial assets derecognized during the period other than write-offs (3,124,605) (279,488) (3,404,093) New financial assets purchased 3,859,206 393 3,859,599 Valuation on investments and Write-offs (133,232) 4,109 (129,123) Foreign exchange 226,961 14,319 241,280 Gross carrying amount as at 31 December 2018 6,785,507 26,159 6,811,666 (1) For further information, see adoption of new accounting standards in Note 32 Impacts on application of new standars (2) Change in measurement to transfer a small proportion of Grupo Agromercantil Holding debt instruments portfolio from fair value to amortized cost. The following shows provisions detail using the expected credit losses model: As of December 31, 2018 Concept Stage 1 Stage 2 Total In millions of COP Securities at amortized cost 3,456,164 25,764 3,481,928 Carrying amount 3,467,285 26,373 3,493,658 Loss allowance (11,121) (609) (11,730) Securities at fair value through other comprehensive income 3,329,345 393 3,329,738 Carrying amount 3,332,398 393 3,332,791 Loss allowance (3,053) - (3,053) The changes in allowance are mainly due the expected credit losses model in debt instruments measured at amortized cost. The following table sets forth the changes in the allowance for debt instruments measured at amortized cost and fair value through other comprehensive income: Concept Stage 1 Stage 2 Total In millions of COP Balance of January 1, 2018 8,932 6,797 15,729 Net effect in loss allowance changes 5,044 (2,467) 2,577 Transfer to 12-Month ECL 3,955 (500) 3,455 Transfer to lifetime ECL not credit-impaired 1,089 (1,967) (878) New debt instruments purchased 6,508 - 6,508 Debt instruments that have been derecognized (7,072) (3,714) (10,786) Translation adjustment 762 (7) 755 Balance of December 31, 2018 14,174 609 14,783 The decrease in stage 2 is due to changes in debt instruments to stage 1 due to improvements in portfolio’s credit risk and a better performance of the Salvadorian economy due to an increase of the received remittances. 5.2 Derivative financial instruments The Bank derivative activities do not give rise to significant open positions in portfolios of derivatives. The Bank enters into derivative transactions to facilitate customer business, for hedging purposes and arbitrage activities, such as forwards, options or swaps where the underlying are exchange rates, interest rates and securities. A swap agreement is a contract between two parties to exchange cash flows based on specified underlying notional amounts, assets and/or indices. Financial futures and forward settlement contracts are agreements to buy or sell a quantity of a financial instrument (including another derivative financial instrument), index, currency or commodity at a predetermined rate or price during a period or at a date in the future. Futures and option contracts are standardized agreements for future delivery, traded on exchanges that typically act as a platform. For further information related to the objectives, policies and processes for managing the Bank’s risk, please see Note 31 Risk management. The following table sets forth for the Bank’s derivatives by type of risk as of December 31, 2018 and 2017: Derivatives December 31, 2018 December 31, 2017 In millions of COP Forwards Assets Foreign exchange contracts 294,345 172,310 Equity contracts 981 372 Subtotal assets 295,326 172,682 Liabilities Foreign exchange contracts (299,015) (142,976) Equity contracts (7,585) (4,470) Subtotal liabilities (306,600) (147,446) Total forwards (11,274) 25,236 Swaps Assets Foreign exchange contracts 1,199,236 672,558 Interest rate contracts 252,928 274,137 Subtotal assets 1,452,164 946,695 Liabilities Foreign exchange contracts (700,903) (505,823) Interest rate contracts (257,978) (275,641) Subtotal liabilities (958,881) (781,464) Total swaps 493,283 165,231 Options Assets Foreign exchange contracts 96,218 14,995 Subtotal assets 96,218 14,995 Liabilities Foreign exchange contracts (29,589) (16,943) Subtotal liabilities (29,589) (16,943) Total options 66,629 (1,948) Derivative assets 1,843,708 1,134,372 Derivative liabilities (1,295,070) (945,853) Total, net 548,638 188,519 The table below present the notional amounts of the derivatives contracts as of December 31, 2018 and 2017: Derivatives December 31, 2018 December 31, 2017 In millions of COP Forwards Assets Foreign exchange contracts 10,968,445 11,618,005 Equity contracts 495,124 1,010,557 Subtotal assets 11,463,569 12,628,562 Liabilities Foreign exchange contracts (11,482,549) (10,276,967) Equity contracts (2,278,708) (1,796,020) Subtotal liabilities (13,761,257) (12,072,987) Total forwards (2,297,688) 555,575 Swaps Assets Foreign exchange contracts 10,504,017 6,188,880 Interest rate contracts 21,281,866 16,315,701 Subtotal assets 31,785,883 22,504,581 Liabilities Foreign exchange contracts (4,962,024) (4,163,466) Interest rate contracts (16,997,169) (15,850,149) Subtotal liabilities (21,959,193) (20,013,615) Total swaps 9,826,690 2,490,966 Options Assets Foreign exchange contracts 1,797,496 697,346 Subtotal assets 1,797,496 697,346 Liabilities Foreign exchange contracts (1,638,795) (682,197) Subtotal liabilities (1,638,795) (682,197) Total options 158,701 15,149 Futures Assets Foreign exchange contracts 1,426,478 3,772,283 Equity contracts 54,002 175,500 Subtotal assets 1,480,480 3,947,783 Liabilities Foreign exchange contracts (1,434,115) - Equity contracts (3,000) - Subtotal liabilities (1,437,115) - Total futures 43,365 3,947,783 Derivative assets 46,527,428 39,778,272 Derivative liabilities (38,796,360) (32,768,799) Total, net 7,731,068 7,009,473 The following table sets forth the remaining contractual life of the derivatives portfolio: As of December 31, 2018 Forwards Swaps Options Total Assets 295,326 1,452,164 96,218 1,843,708 Up to 1 year 277,578 645,735 69,292 992,605 From 1 to 3 years 17,741 345,321 26,926 389,988 Over 3 years 7 461,108 - 461,115 Liabilities (306,600) (958,881) (29,589) (1,295,070) Up to 1 year (292,585) (270,900) (17,305) (580,790) From 1 to 3 years (14,015) (262,848) (12,284) (289,147) Over 3 years - (425,133) - (425,133) Total (11,274) 493,283 66,629 548,638 As of December 31, 2017 Forwards Swaps Options Total Assets 172,682 946,695 14,995 1,134,372 Up to 1 year 170,299 240,690 14,229 425,218 From 1 to 3 years 2,383 339,934 766 343,083 Over 3 years - 366,071 - 366,071 Liabilities (147,446) (781,464) (16,943) (945,853) Up to 1 year (141,326) (135,749) (15,836) (292,911) From 1 to 3 years (6,120) (321,708) (1,107) (328,935) Over 3 years - (324,007) - (324,007) Total 25,236 165,231 (1,948) 188,519 Collateral for derivatives The table below presents the cash collateral amounts posted under derivatives contracts as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 In millions of COP Collateral paid 213,677 154,599 Collateral received (471,340) (264,700) Hedge accounting The Bank, through Banistmo, has entered into derivatives to manage its interest risk. Those derivatives are designated as hedging instruments to protect the Bank against changes in the fair value of Banistmo´s position in debt instruments issued by the Panamanian Government (fair value hedge). In order to protect against interest risk due to changes in cash flows related to Banitmo’s portfolio of floating-rate deposits (cash flow hedge), Banistmo entered into cash flow hedge contracts until March 2016, when the hedging relationship was discontinued. The hedge effectiveness assessment is performed on a monthly basis consistently throughout the hedging relationship. For fair value hedges, the changes in value of the hedging derivative, as well as the changes in value of the related hedged item concerning to the risk hedged, are reflected in the statement of income in the line “Interest and valuation on investments”. Fair value hedging As of December 31, 2018 and 2017, Banistmo has designated 7 and 12 asset derivative contracts (Interest rate swaps), respectively, as fair value hedging instruments with maturity dates ranging from September 2019 to December 2027. As of December 31, 2018 and 2017, Banistmo has designated 5 liability derivative contracts (Interest rate swaps), as fair value hedging instruments with maturity dates ranging from September 2019 to April 2026. The following table contains details of the hedged expresures covered by the Group's hedging strategies: December 31, 2018 In millions of COP Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Assets Fair value hedges Interest rate - Fixed rate 285,463 1,829 Financial assets investments December 31, 2018 In thousands of USD Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Assets Fair value hedges Interest rate - Fixed rate 87,841 563 Financial assets investments December 31, 2017 In millions of COP Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Liabilities Fair value hedges Interest rate - Fixed rate 341,229 (1,769) Financial assets investments December 31, 2017 In thousands of USD Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Libialities Fair value hedges Interest rate - Fixed rate 114,353 (593) Financial assets investments The following table sets forth the notional amount and fair value of the hedged item recognized in the statement of financial position as ‘Financial assets investments’, as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 In millions of COP Notional amount 258,518 304,159 Fair value 285,463 341,229 December 31, 2018 December 31, 2017 In thousands of USD Notional amount 79,550 101,930 Fair value 87,841 114,353 In June 2018, an investment matured in the amount of USD 22,380 (COP 72,729). The following table contains information regarding the effectiveness of the hedging relationships designated by the Group, as well as the impacts on profit or loss and other comprehensive income: December 31, 2018 In millions of COP Gains / (loss) recognized in OCI Hedge Ineffectiveness recognized in P&L P&L line item that includes hedge ineffectiveness Fair value hedges Interest rate - Fixed rate - 14,158 Other operating income December 31, 2017 In millions of COP Gains / (loss) recognized in OCI Hedge Ineffectiveness recognized in P&L P&L line item that includes hedge ineffectiveness Fair value hedges Interest rate - Fixed rate - (3,678) Other operating income December 31, 2016 In millions of COP Gains / (loss) recognized in OCI Hedge Ineffectiveness recognized in P&L P&L line item that includes hedge ineffectiveness Fair value hedges Interest rate - Fixed rate - 14,634 Other operating income Cash flow hedging During 2016 the Bank had reclassified from other comprehensive income to net income the net amount of COP (12,112) arising from the settlement of the derivative contract swap interest rate designated as cash flow hedge. Banistmo entered into cash flow hedge contracts until March 2016. The Bank has not carried out new cash flow hedge operations. Net foreign investment Exchange differences relating to the translation of the results and net assets of Banistmo operations from its functional currency (dollar) to the Bank's presentation currency (Colombian pesos) are recognized directly in other comprehensive income by the Parent Company. Gains and losses on debt instruments in issue which were designated as hedging instruments for hedges of net investments in foreign operations are included in the foreign currency translation reserve. The amount of the debt in issue designated was USD 2,200,000 as of December 31, 2018 and 2017. The adjustment recognized in other comprehensive income amounted to COP (584,650), COP 36,762 and COP 327,272, for the years ended at December 31, 2018, 2017 and 2016, respectively. Offsetting of derivatives The Bank enters into International Swaps and Derivatives Association (ISDA) master netting agreements or similar agreements with substantially all of the Bank’s derivative counterparties. Where legally enforceable, and depending on the Bank’s intention, these master netting agreements give the Bank, in the event of default by the counterparty, the right to liquidate securities and cash equivalents held as collateral and to offset receivables and payables with the same counterparty. The table below presents derivative instruments subject to enforceable master netting agreements and other similar agreements but not offset in the statement of financial position as of December 31, 2018 and 2017 by derivative and by risk: As of December 31, 2018 Derivatives Assets Derivatives Liabilities In millions of COP Over-the-counter Foreign exchange contracts Swaps 1,199,236 (700,903) Forwards 294,345 (299,015) Options 96,218 (29,589) Interest rate contracts Swaps 252,928 (257,978) Equity contracts Forwards 981 (7,585) Gross derivative assets/liabilities 1,843,708 (1,295,070) Derivative financial instruments in statement of financial position 1,843,708 (1,295,070) Master netting agreements (1,179,503) 1,295,070 Cash collateral received/paid (471,340) - Total derivative financial instruments assetss/ liabilities before collateral and Master netting agreements 192,865 - As of December 31, 2017 Derivatives Assets Derivatives Liabilities In millions of COP Over-the-counter Foreign exchange contracts Swaps 672,558 (505,823) Forwards 172,310 (142,976) Options 14,995 (16,943) Interest rate contracts Swaps 274,137 (275,641) Equity contracts Forwards 372 (4,470) Gross derivative assets/liabilities 1,134,372 (945,853) Derivative financial instruments in statement of financial position 1,134,372 (945,853) Master netting agreements (894,863) 945,853 Cash collateral received/paid (239,509) - Total derivative financial instruments assetss/ liabilities before collateral and Master netting agreements - - For further information about offsetting of other financial assets and liabilities see Note 15 Interbank deposits and repurchase agreements and other similar secured borrowing.

LOANS AND ADVANCES TO CUSTOMERS

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET	12 Months Ended
	Dec. 31, 2018
Disclosure Of Loans And Advances To Customers Explanatory [Abstract]
Disclosure of loans and advances to customers [text block]	NOTE 6. LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET Loans and financial leasing operating portfolio The following is the composition of the loans and financial leasing operations portfolio, net as of December 31, 2018 and 2017: Composition December 31, 2018 December 31, 2017 In millions of COP Commercial (1) 94,600,648 88,997,241 Consumer 31,993,381 27,646,114 Mortgage 22,870,685 20,512,208 Financial Leases 23,198,204 22,248,951 Small Business Loans 1,156,198 1,063,580 Total gross loans and Financial Leases 173,819,116 160,468,094 Total allowance (2) (10,235,831) (8,223,103) Total Net Loans and financial leases 163,583,285 152,244,991 (1) Includes loans to financial institutions amounting to COP 8,154,507 and COP 7,862,401 as of December 31, 2018 and 2017, respectively. (2) The allowance as of December 31, 2018 was estimated according to the expected credit losses methodology required by IFRS 9, on the other hand, the estimations for the year ended as of December 31, 2017 were computed under IAS 39, therefore both amounts are not comparable. For further information see Note 32 Impacts on application of new standards. The following table shows the breakdown of loans to financial institutions by stage: As of December 31, 2018 Stage 1 Stage 2 Stage 3 TOTAL Total loans to Financial institutions 8,140,354 13,812 341 8,154,507 Allowance (15,048) (1,123) (267) (16,438) Total Net Loans with financial institutions 8,125,306 12,689 74 8,138,069 For more details on the composition of the loans and financial leasing operations portfolio, see Note 31 Risk Management. Allowance for loans losses The following table sets forth the changes in the allowance for loans and advances and lease losses as of December 31, 2018, 2017 and 2016: As of December 31, 2018 (under IFRS 9) Concept Commercial Consumer Mortgage Financial Leases Small business loans Total In millions of COP Balance of period December 31, 2017 4,514,180 2,291,829 645,101 631,402 140,591 8,223,103 + Effect of adoption of IFRS 9 512,959 237,515 106,692 176,521 1,374 1,035,061 +Balance at beginning of period January 1, 2018 5,027,139 2,529,344 751,793 807,923 141,965 9,258,164 +/- Loan purchases / Loan sales (1) (2,020) - - (377) - (2,397) + Provisions for loan losses (2) 5,003,417 3,081,883 337,092 341,651 110,317 8,874,360 - Charges-off (1,468,704) (2,012,315) (112,417) (135,674) (86,802) (3,815,912) - Recoveries (2) (3,415,455) (886,928) (163,846) (58,175) (38,471) (4,562,875) Adjusted stage 3 (3) 158,396 71,157 26,502 22,230 7,127 285,412 +/- Translation adjustment 58,060 109,750 14,640 13,392 3,237 199,079 Balance at December 31, 2018 5,360,833 2,892,891 853,764 990,970 137,373 10,235,831 (1) This ítem includes portfolio purchase/sales operation held between Bancolombia S.A. and Titularizadora Colombiana. (2) The provision for loan losses, net COP 4,311,485 differs from the COP 3,851,625 presented in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 459,860 due to the recovery of charged-off loans. (3) Provisions reflect the expected credit losses (ECL) measured using the three-step approach under IFRS 9, as described in Note 2.D Significant accounting policies. As of December 31, 2017 (under IAS 39) Concept Commercial Consumer Mortgage Financial Leases Small business loans Total In millions of COP +Balance at beginning of period 3,499,791 1,791,123 653,936 567,046 110,015 6,621,911 + Provisions for loan losses (1) 3,594,310 2,310,518 284,392 276,687 119,690 6,585,597 - Charges-off (792,145) (1,302,630) (37,677) (77,762) (65,086) (2,275,300) - Recoveries (1) (1,783,649) (510,684) (253,578) (133,986) (24,141) (2,706,038) +/- Translation adjustment (4,127) 3,502 (1,972) (583) 113 (3,067) = Balance at end of year 4,514,180 2,291,829 645,101 631,402 140,591 8,223,103 (1) The provision for loan losses, net COP 3,879,559 differs from the COP 3,468,699 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 410,860 due to the recovery of charged-off loans. As of December 31, 2016 (under IAS 39) Concept Commercial Consumer Mortgage Financial Leases Small business loans Total In millions of COP +Balance at beginning of period 2,694,965 1,321,281 572,772 579,151 80,586 5,248,755 +Allowance for loan of PA Leasing - - - 27,825 - 27,825 + Provisions for loan losses (1) 2,684,559 1,922,315 225,291 221,694 95,272 5,149,131 - Charges-off (489,573) (902,400) (24,619) (74,900) (41,710) (1,533,202) - Recoveries (1) (1,379,288) (525,510) (109,912) (180,537) (23,645) (2,218,892) +/- Translation adjustment (10,872) (24,563) (9,596) (6,187) (488) (51,706) = Balance at end of year 3,499,791 1,791,123 653,936 567,046 110,015 6,621,911 (1) The provision for loan losses, net COP 2,930,239 differs from the COP 2,643,710 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 286,529 due to the recovery of charged-off loans. The sale of a 51% interest in Compañia de Financiamiento Tuya S.A took place on October 31, 2016. The amounts recognized until that date are presented in the line “Net income from discontinued operations” of the Statement of Income. The following table is the movement associated with this company: Concept December 31, 2016 +Balance at beginning of period 351,375 + Provisions for loan losses (*) 465,947 - Charges-off (228,757) - Recoveries (*) (147,668) = Balance at end of year 440,897 (*) The provision for loan losses net of COP 318,279 differs from the COP 323,290 presented in “Credit impairment charges on loans and advances and financial leases, net" in note 30. Discontinued operations, in the amount of COP 5,011 due to provision on off balance sheet credit exposures that was accounted for as a liability under IAS 37. The following explains the significant changes in the provisions during, the period ended at December 31, 2018 with the expected credit loss model according to IFRS 9: Stage 1 Stage 2 Stage 3 Simplified methodology TOTAL In millions of COP Balance at January 1, 2018 1,601,051 1,042,597 6,589,347 25,169 9,258,164 Transfer to Stage 1 (40,083) (252,397) (109,871) 8,598 (393,753) Transfer to Stage 2 (88,750) 532,660 (199,399) 588 245,099 Transfer to Stage 3 (103,002) (190,762) 4,168,739 (4,099) 3,870,876 Net remeasurement of loss allowance (231,835) 89,501 3,859,469 5,087 3,722,222 New financial assets purchased/originated 770,102 343,594 1,087,934 (148) 2,201,482 Financial assets that have been derecognized (367,718) (150,433) (811,014) (39) (1,329,204) Charges-off (47,608) (138,572) (3,617,762) (11,970) (3,815,912) Foreign Exchange and other movements 35,783 28,636 136,528 (1,868) 199,079 Balance at December 31, 2018 1,759,775 1,215,323 7,244,502 16,231 10,235,831 Impact of movements in loans and provision for Stage Stage 1 (12 months expected credit losses): stage 1 credit exposure and allowance increased COP 14,599,662 and COP 158,724 respectively; changes in exposure are related to new disbursements for COP 72,427,570, mainly in Bancolombia S.A., due to growth of the loans portfolio and the exchange rate variation, that increased loans denominated in U.S. dollar; the financial assets that have been derecognized and charges off amounted to COP 47,008,259; increments in the allowance are consistent with portfolio growth and also with the inclusion of new information (2018) in the expected credit losses models. Stage 2 (Lifetime expected credit losses): stage 2 credit exposure decreased COP 1,065,389, whereas the allowance increased COP 172,726, the behavior in the exposure is related to commercial portfolio migrations from stage 2 to stage 3, the new disbursements that ended the year in stage 2 amounted to COP 1,943,921, the financial assets that have been derecognized and charges off amounted to COP 1,779,790; on the hand, Bancolombia, accounts for most of the allowance increase, and it is explained by commercial restructured loans, cure clients (clients that came out of default in the past year) and retail loans. Stage 3 (Lifetime expected credit losses): stage 3 credit exposure and allowance increased COP 537,559 and COP 655,155 respectively; changes in exposure are explained by migrations of high balance commercial loans from stage 2 to stage 3, most of them in watch list level 3, the new disbursements that ended the year in stage 3 amounted to COP 2,007,062. In Bancolombia, stage 3 exposure diminished due to write offs in the infrastructure sector for COP 302,325; the total of the financial assets that have been derecognized and charges off in stage 3 amounted to COP 5,183,154. The raise in the allowance is explained by relevant issues that increase the expected losses of clients that were already in default, and belonged to the energy, infrastructure and transport sectors. Charges-off As of December 31, 2018 and 2017 the write off loans amounted to COP 3,815,912 and COP 2,275,300. Leasing operations: Finance leases - lessor The Bank has subscribed lease agreements as lessor. These leases arrangements involve machinery and equipment, computer equipment, automobile and furniture and fixtures and their terms range between one and twenty years, as follows: As of December 31, 2018 Period Gross investment in finance lease receivable Present value of minimum payments In millions of COP Within 1 year 735,187 526,581 Over 1 year, but less than 5 years 8,194,658 6,677,063 Over 5 years 22,738,577 15,994,560 Total gross investment in finance lease receivable/ present value of minimum payments 31,668,422 23,198,204 Less: Future financial income (1) (8,470,218) - Present value of payments receivable 23,198,204 23,198,204 Minimum non-collectable payments impairment (985,844) (985,844) Total 22,212,360 22,212,360 (1) Future financial income: Total Gross Investment - Total Present Value of minimum payments As of December 31, 2017 Period Gross investment in finance lease receivable Present value of minimum payments In millions of COP Within 1 year 759,852 526,604 Over 1 year, but less than 5 years 7,842,992 6,188,894 Over 5 years 22,212,438 15,533,453 Total gross investment in finance lease receivable/ present value of minimum payments 30,815,282 22,248,951 Less: Future financial income (1) (8,566,331) - Present value of payments receivable 22,248,951 22,248,951 Minimum non-collectable payments impairment (447,361) (447,361) Total 21,801,590 21,801,590 (1) Future financial income: Total Gross Investment - Total Present Value of minimum payments Unsecured residual value (*) The following table sets the unsecured residual values by type of asset as of December 31, 2018 and 2017: Type of asset December 31, 2018 December 31, 2017 In millions of COP Automobile 22,680 26,841 Technology 25,229 20,921 Machinery and equipment 11,300 8,627 Furniture and fixtures 189 62 Total 59,398 56,451 (*) The unsecured residual value is the part of the residual value of the leased asset, whose realization is not secured or is secured by a third party related to the lessor. Operating leases - lessor Certain of the Bank’s subsidiaries leases assets to third parties under non-cancelable leases arrangements. Assets provided through operating leases are recorded as premises and equipment the terms established for these agreements range from one to ten years. The following table presents the information of minimum payments by lease to be received: December 31, 2018 December 31, 2017 In millions of COP Within 1 year 216,039 110,993 Over 1 year, but less than 5 years 934,816 960,037 Over 5 years 139,493 154,996 Total 1,290,348 1,226,026

INVESTMENTS IN ASSOCIATES AND J

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES	12 Months Ended
	Dec. 31, 2018
Disclosure Of Interests In Other Entities Explanatory [Abstract]
Disclosure of interests in other entities [text block]	NOTE 7. INVESTMENTS IN ASSOCIATES AND JOINT VENTURES The following table presents information regarding the Bank’s investments in associates and joint ventures: Composition December 31, 2018 December 31, 2017 In millions of COP Investments in associates (1) 1,710,969 1,327,610 Investments in Joint ventures 438,610 237,449 Total 2,149,579 1,565,059 (1) As of December 31, 2018 and 2017, the amount includes investments in associates at fair value for COP 1,119,973 and COP 757,886, respectively and investments in associates accounted for by the equity method for COP 590,996 and COP 569,724 respectively. See note 29 Fair value of assets and liabilities. The following are the investments in associates that the Bank holds as of December 31, 2018 and 2017: As of December 31, 2018 Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3) OCI (CTA) (4) OCI (Deferred tax) (5) Carrying amount In millions of COP Investments in associates PA Viva Malls (6) Development and operation of commercial spaces Colombia 49.00% 96,201 - - - - 1,119,973 Protección S.A. Administration of pension funds and severances Colombia 20.58% 42,057 15,423 2,958 - (819) 478,482 Titularizadora Colombiana S.A. Hitos* Mortgage portfolio securities Colombia 26.98% 4,962 (1,483) (94) - 40 37,391 Redeban Multicolor S.A.* Network data transmission services Colombia 20.36% 2,203 (651) - - 45 19,105 Concesiones CCFC S.A.* Construction of public works through an awarding system Colombia 25.50% 6,794 (757) (1) - 34 13,063 Internacional Ejecutiva de Aviación S.A.S. Aircraft and aircraft travel Colombia 33.33% 2,008 (4) (213) - - 12,503 Servicio Salvadoreño de Protección, S. A. de C.V. * Custodial services and transfer of monetary types El Salvador 25.00% 1,905 (727) - (30) (16) 8,867 Reintegra S.A.S.* (7) Collections and recovery of portfolio Colombia 46.00% 1,939 1,742 - - (26) 8,594 ACH Colombia S.A. * Electronic transfer services Colombia 19.94% 3,871 (952) - - 79 8,313 Servicios Financieros, S.A. de C.V. * Processing of financial transactions and electronic payment methods El Salvador 47.86% (160) 9 - (7) - 3,420 ACH de El Salvador, S. A. de C.V. * Electronic transfer services El Salvador 25.00% 143 6 - (64) - 1,258 Investments in associates classified as assets held for sale (8) Panamerican Pharmaceutical Holding Inc. Advisory services, consultation, representation, agent for individuals or company Panama 21.00% - (1,486) (69) (785) - - Avefarma S.A.S Manufacture and distribution of glass packing for pharmaceutical products Colombia 21.00% - (11,704) - - - - Glassfarma Tech S.A.S Manufacturing, elaboration and commercialization of packages and pharmaceutical products Colombia 21.00% - 127 - - - - Net investments in associates 161,923 (457) 2,581 (9) (886) (663) (9) 1,710,969 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018. See note 24.5 Dividends received, and share of profits of equity method investees (2) Corresponds to the accumulated other comprehensive income as of December 31, 2018. (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2018. (4) Corresponds to the other comprehensive income recognized as Cumulative Translation Adjustment of Foreign Currency (CTA) for the year ended December 31, 2018. (5) Corresponds to the other comprehensive income as deferred tax for the year ended December 31, 2018. (6) During 2018, the Bank increases its capital contribution in P.A Viva Malls by COP 274,951 (7) During 2018, the Bank increases its capital contribution in Reintegra S.A.S by COP 1,152 (8) As of December 31, 2018 the investment in Avefarma S.A.S., Glassfarma Tech S.A.S and Panamerican Pharmaceutical Holding inc are still classified as "assets held for sale". See note 12. Assets held for sale and inventories. (9) See Consolidated Statement of Comprehensive Income (*) As of December 31, 2017 Investments in Associates Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3) OCI (CTA) (4) Carrying amount In millions of COP Investments in associates PA Viva Malls Development and operation of commercial spaces Colombia 49.00% (5) 144,146 - - - 757,886 Protección S.A. Administration of pension funds and severances Colombia 20.58% 72,576 12,465 1,236 - 471,312 Titularizadora Colombiana S.A. Hitos* Mortgage portfolio securities Colombia 26.98% 3,305 (1,389) (768) - 35,346 Redeban Multicolor S.A.* Network data transmission services Colombia 20.36% 1,906 (651) - - 17,951 Internacional Ejecutiva de Aviación S.A.S. * Aircraft and aircraft travel Colombia 33.33% 1,071 209 - - 10,707 Concesiones CCFC S.A. Construction of public works through an awarding system Colombia 25.50% 6,756 (756) (3) - 9,383 ACH Colombia S.A. * Electronic transfer services Colombia 19.94% 3,109 (952) - - 7,338 Reintegra S.A.S. * Collections and recovery of portfolio Colombia 46.00% 1,471 1,742 (1,754) - 7,155 Servicio Salvadoreño de Protección, S. A. de C.V. * Custodial services and transfer of monetary types El Salvador 25.00% 418 (727) 238 153 6,219 Servicios Financieros, S.A. de C.V. * Processing of financial transactions and electronic payment methods El Salvador 47.86% (226) 9 - (5) 3,302 ACH de El Salvador, S. A. de C.V. * Electronic transfer services El Salvador 25.00% 123 6 - (1) 1,011 Investments in associates classified as assets held for sale (6) Panamerican Pharmaceutical Holding Inc * Advisory services, consultation, representation, agent for individuals or company Panama 21.00% (1,171) (1,417) 196 (67) - Avefarma S.A.S* Manufacture and distribution of glass packing for pharmaceutical products Colombia 21.00% 6,307 (11,704) (10,831) - - Glassfarma Tech S.A.S * Manufacturing, elaboration and commercialization of packages and pharmaceutical products Colombia 21.00% (458) 127 139 - - Net investments in associates 239,333 (3,038) (11,547) (7) 80 1,327,610 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2017. See note 24.5 Dividends received, and share of profits of equity method investees (2) Corresponds to the accumulated other comprehensive income as of December 31, 2017 . (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2017. (4) Corresponds to the other comprehensive income recognized as Cumulative Translation Adjustment of Foreign Currency (CTA) for the year ended December 31, 2017. (5) As of December 31, 2017 the increases of ownership interest are related to capital contributions during the year 2017. (6) As of December 31, 2017 the Bank classified the investment in Avefarma S.A.S., Glassfarma Tech S.A.S and Panamerican Pharmaceutical Holding inc as "assets held for sale", due to the fact that the management has currently been implementing a plan to sell these assets. See note 12 assets held for sale and inventories. (7) See Consolidated Statement of Comprehensive Income. (*) The following is additional information regarding the Bank’s most significant associates as of December 31, 2018 and 2017 (unaudited accounts): As of December 31, 2018 Company name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millions of COP PA Viva Malls 2,301,567 11,304 417,942 271,648 9,064 Protección S.A. (1) 2,172,208 675,135 1,387,294 205,134 37,861 Titularizadora Colombiana S.A. Hitos 151,447 16,911 50,213 14,923 2,824 (1) The difference between, the net assets of Protección S.A. multiplied by the Bank’s percentage of ownership, which amounted to COP 308,048 for the year ended December 31, 2018 and the carrying amount of the Bank’s interest in the associate; represents the goodwill recognized by the Bank amounting to COP 170,434. As of December 31, 2017 Company Name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millions of COP PA Viva Malls (1) 1,262,837 29,499 380,612 235,647 35,278 Protección S.A. (2) 2,125,552 663,326 1,227,139 343,345 36,825 Titularizadora Colombiana S.A. Hitos 614,032 487,073 35,714 8,161 3,121 (1) The difference between the net assets of P.A. Viva Malls multiplied by the Bank’s percentage of ownership, which amounted to COP 604,336 for the year ended December 31, 2017 and the carrying amount of the Bank’s interest in the associate, represents an adjustment amounted to COP 153,550 related to contractual terms with respect to the recognition of benefits. (2) The difference between the net assets of Protección S.A. multiplied by the Bank’s percentage of ownership, which amounted to COP 300,926 for the year ended December 31, 2017, and the carrying amount of the Bank’s interest in the associate, represents the goodwill recognized by the Bank amounting to COP 170,434 As of December 31, 2018 and 2017, there are no restrictions on the ability of the associates to transfer funds to the Bank in the form of cash dividends. The following are the Joint ventures that the Bank holds as of December 31, 2018 and 2017: As of December 31, 2018 Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3 ) Carrying amount Compañía de financiamiento Tuya S.A (4)(5) Financing company Colombia 50.00% 27,623 - - 431,510 Puntos Colombia S.A.S Administration of the customers loyalty Colombia 50.00% (1,613) - - 5,600 P.A Servicios Tecnológicos Arus- Bancolombia (6) Technology services provider Colombia 50.00% - - - 1,500 Servicios de Aceptación S.A.S (in liquidation) (7) Network data transmission services Colombia 50.00% (110) - - - Fideicomiso Ruta del Sol - compartimento A Investment in infrastructure projects Colombia 50.00% (9) 13 - - Net investments in joint ventures 25,891 13 - 438,610 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018 (2) Corresponds to the accumulated other comprehensive income as of December 31, 2018 (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2018 (4) The revaluation of the consumer loan portfolio in Colombia increased significantly during 2018, and there was an improvement in loan coverage rates due to the economic cycle in the country and the current payment behavior in the consumer segment. As a result, management measured the recoverable amount of Tuya's Cash Generation Unit (CGU). The measurement was estimated by determining the fair value of the asset which implies the professional services of a business valuation specialist; as a result of the valuation the Bank recognized a recovery of the impairment loss of COP 173,339. For more information about the applied valuation technique, see note 29 Fair value of assets and liabilities. (5) In March 2018, The Bank increases its capital contribution in Compañia de Financiamiento TUYA S.A for COP 5,000 (6) In December 2018, Banca de Inversión Bancolombia, a Bank’s subsidiary, entered into an agreement with ARUS whereby both parties have joint control to the net assets of P.A Servicios Tecnológicos Arus- Bancolombia. The purpose of the entity is to provide technology services. (7) The joint venture of Servicios de Aceptación SAS was derived from the alliance between Bancolombia and First Data for improving the development of the credit card business for individuals, however the strategy was refocused in 2018. Consequently, both parties agreed to advance in the development of this business considering First Data as the Bank’s service provider of processing data and to dissolve the joint venture. As of December 31, 2017 Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3 ) Carrying amount In millions of COP Compañía de financiamiento Tuya S.A (4) Financing company Colombia 50.00% 20,778 - - 225,548 Puntos Colombia S.A.S (5) Administration of the customers loyalty Colombia 50.00% (1,787) - - 7,213 Servicios de Aceptación S.A Network data transmission services Colombia 50.00% 1,663 - - 4,688 Fideicomiso Ruta del Sol - compartimento A (6) Investment in infrastructure projects Colombia 50.00% (6,385) 13 - - Net investments in joint ventures 14,269 13 - 237,449 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2017. See note 24.5 Dividends received, and share of profits of equity method investees (2) Corresponds to the accumulated other comprehensive income as of December 31, 2017. (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2017. (4) On December 2017, given the continued impairment of the consumer loans portfolio of the company during 2017, the Bank management performed a valuation, to establish the fair value of the Compañía de Financiamiento TUYA S.A. As a result of the valuation, the fair value of the investment was lower than the book value, for this, the Bank recorded an impairment in the statement of income for COP 173,339. See note 29 Fair value for assets and liabilities. (5) In June 2017, Banca de Inversión Bancolombia formed a joint venture with Grupo Éxito. The purpose of the company is the developing and administration of customer’s loyalty programs provided by both parties in the agreement. (6) Given the losses of Fideicomiso Ruta del Sol - compartimento A for the year 2017, the aplication of the equity method resulted in a reduction of the total book value of the investment. The following is complementary information regarding the Bank’s most significant joint ventures as of December 31, 2018 and 2017: As of December 31, 2018 Company name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millons of COP Compañía de financiamiento TUYA S.A. 2,790,596 2,447,483 1,450,242 55,258 - . As of December 31, 2017 Company name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millons of COP Compañía de financiamiento TUYA S.A. 2,571,106 2,293,239 1,344,712 41,556 371 As of December 31, 2018 a contingent liability regarding the Bank’s interest in Fideicomiso Ruta del Sol Compartimiento A. was settled. This liability was initially recorded as of December 31, 2017, amounting to COP 12,342. As of December 31, 2016 the Bank has recognized COP 60,254 as equity method in the statement of income, COP (1,718) as other comprehensive income from equity method and COP 3,029 as other comprehensive income from currency translation adjustment. Additionally, during 2016, the Bank received dividends amounting to COP 38,036 from its significant associates.

GOODWILL AND INTANGIBLE ASSETS,

GOODWILL AND INTANGIBLE ASSETS, NET	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about intangible assets [abstract]
Disclosure of intangible assets and goodwill [text block]	NOTE 8. GOODWILL AND INTANGIBLE ASSETS, NET Intangibles assets and goodwill net are as follows: December 31, 2018 December 31, 2017 In millions of COP Intangible assets 563,452 535,465 Goodwill 6,638,403 6,095,959 Total 7,201,855 6,631,424 8.1. Intangible assets The following table sets forth the Bank's intangible assets as of December 31, 2018 and 2017, including the reconciliation of initial and final balances of the cost and accrued amortization: As of December 31, 2018 Cost Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2018 17,642 526,923 344,020 888,585 Acquisitions - 133,376 - 133,376 Write off - (29,663) - (29,663) Foreign currency translation adjustment 1,571 23,758 30,638 55,967 Balance at December 31, 2018 19,213 654,394 374,658 1,048,265 Amortization Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2018 (5,040) (203,554) (144,526) (353,120) Write off - 25,929 - 25,929 Amortization expense (2,497) (64,204) (56,850) (123,551) Foreign currency translation adjustment (697) (14,865) (18,509) (34,071) Balance at December 31, 2018 (8,234) (256,694) (219,885) (484,813) Intangible assets at December 31, 2018, net 10,979 397,700 154,773 563,452 As of December 31, 2017 Cost Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2017 17,741 481,643 345,946 845,330 Acquisitions - 70,681 - 70,681 Write off - (24,296) - (24,296) Foreign currency translation adjustment (99) (1,105) (1,926) (3,130) Balance at December 31, 2017 17,642 526,923 344,020 888,585 Amortization Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2017 (2,533) (200,995) (77,860) (281,388) Write off - 44,690 - 44,690 Amortization expense (2,493) (47,698) (66,561) (116,752) Foreign currency translation adjustment (14) 449 (105) 330 Balance at December 31, 2017 (5,040) (203,554) (144,526) (353,120) Intangible assets at December 31, 2017, net 12,602 323,369 199,494 535,465 As of December 31, 2018 and 2017, the assessment made by the Bank indicates there is no evidence of impairment of intangible assets. As of December 31, 2018 and 2017, the Bank does not have intangible assets with restricted ownership, intangible assets pledged as collateral or contractual agreements for the acquisition of this class of assets. Research and development costs related to software development During the period ending at December 31, 2018, 2017 and 2016, the Bank incurred in costs that are directly related to software development amounted to COP 78,222, COP 105,145 and COP 16,715. These costs were the result of the analysis and design and implementation of the transformation projects, the most representative of which are: change in core collections, transactional switch, adoption of IFRS 9, change in core banking correspondents. The expenses were recorded mainly as fees paid in the line ‘Other administrative and general expenses’ of the consolidated statement of income. Intangibles which did not meet the criteria to be recognized as assets During the period ended December 31, 2018, 2017 and 2016, the Bank has recognized in the consolidated statement of income the amount of COP 41,690, COP 23,180 and 16,217, related to expenditures which were not recognized as intangible assets. These expenses were not recorded as assets due to the lack of characterists to be reliably identifiable, and those assets do not support critical processes to be recognized as intangible assets. 8.2 Goodwill The following table sets forth an analysis of the activity in the goodwill account: December 31, 2018 December 31, 2017 In millions of COP Balance at beginning of the year, net 6,095,959 6,130,095 Effect of change in foreign exchange rate 542,444 (34,136) Balance at end of the year, net 6,638,403 6,095,959 The Bank tests goodwill recognized as a result of business combinations for impairment at least annually using a process that begins with an estimation of the recoverable amount of a group of cash-generation units equal to the operating segment. Recoverable amount is determined by management by reference to market value, if available, by pricing models, or with the assistance of a valuation specialist. Determination of recoverable amount requires management to make assumptions and use estimates to forecast cash flow for periods that are beyond the normal requirements of management reporting; the assessment of the appropriate discount rate; estimation of the recoverable amount of cash-generation units; and the valuation of the separable assets of each business whose goodwill is being reviewed. The key assumptions used by management in determining the recoverable amount are: Operating segment Goodwill 2018 Valuation Methodology Key Assumptions Discount Rate (real) Growth rate (real) Banking El Salvador COP 916,673 Discounted Cash flow 5 years plan 12.40% 3.90% Banking Panama COP 4,963,252 Discounted Cash flow 5 years plan 9.10% 6.70% Banking Guatemala COP 758,478 Discounted Cash flow 5 years plan 11.70% 5.20% In 2018 and 2017, the Bank tested the aforementioned goodwill for impairment purposes at operating segment levels: Banking Panama, Banking El Salvador and Banking Guatemala. Each operating segment represent a group of cash generating units. Evaluating the goodwill impairment at an operating segment level ensure the alignment with the approach used by the CODM (Chief Operating Decision Maker) to make decisions about resources to be allocated to the segments and assess its performance. Sensitivity analysis: In order to assess the impact of changes in certain significant inputs as the discount rate and the growth rate in the operating segments’ recoverable amount, the Bank made a sensitivity analysis of these inputs through the definition of alternative scenarios with their future evolution. The tables below present the changes in the estimated recoverable value of each operating segment obtained as a result of sensitivity analysis: As of December 31, 2018 Banking Panama Growth rate Discount rate 9.35% 9.10% 8.85% 6.70% COP 10,044,682 COP 11,157,929 COP 12,531,296 Discount rate Growth rate 6.45% 6.70% 6.95% 9.10% COP 10,458,284 COP 11,157,929 COP 12,020,283 Banking El Salvador Growth rate Discount rate 12.65% 12.40% 12.15% 3.90% COP 2,893,147 COP 2,975,432 COP 3,062,694 Discount rate Growth rate 3.65% 3.90% 4.15% 12.40% COP 2,945,601 COP 2,975,432 COP 3,007,065 Banking Guatemala Growth rate Discount rate 11.95% 11.70% 11.45% 5.20% COP 1,649,883 COP 1,719,017 COP 1,793,745 Discount rate Growth rate 4.95% 5.20% 5.45% 11.70% COP 1,684,998 COP 1,719,017 COP 1,755,758 As of December 31, 2017 Banking Panama Growth rate Discount rate 9.15% 8.90% 8.65% 6.70% COP 9,750,408 COP 10,939,812 COP 12,435,319 Discount rate Growth rate 6.45% 6.70% 6.95% 8.90% COP 10,161,356 COP 10,939,812 COP 11,917,875 Banking El Salvador Growth rate Discount rate 12.55% 12.30% 12.05% 3.40% COP 2,520,931 COP 2,588,656 COP 2,660,269 Discount rate Growth rate 3.15% 3.40% 3.65% 12.30% COP 2,564,330 COP 2,588,656 COP 2,614,375 Banking Guatemala Growth rate Discount rate 11.55% 11.30% 11.05% 5.30% COP 2,239,238 COP 2,339,936 COP 2,449,482 Discount rate Growth rate 5.05% 5.30% 5.55% 11.30% COP 2,295,042 COP 2,339,936 COP 2,388,737 The Bank considers goodwill as an asset with indefinite useful life.

PREMISES AND EQUIPMENT, NET

PREMISES AND EQUIPMENT, NET	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [abstract]
Disclosure of property, plant and equipment [text block]	NOTE 9. PREMISES AND EQUIPMENT, NET As of December 31, 2018 and 2017 the premises and equipment consisted of the following: As of December 31, 2018 Premises and equipment Balance at January 1, 2018 Roll - forward Acquisitions Expenses depreciation Disposals Assets classified as held for sale Effect of changes in foreign exchange rate Balance at December 31, 2018 In millions of COP Land Cost 337,362 20,924 - (6,079) - 9,525 361,732 Construction in progress Cost 5,129 6,485 - (8,448) - (713) 2,453 Buildings Cost 1,304,539 21,817 - (34,850) (5,916) 58,927 1,344,517 Accumulated depreciation (285,118) - (29,199) 2,913 - (19,587) (330,991) Furniture and fixtures Cost 601,275 28,221 - (24,861) - 24,793 629,428 Accumulated depreciation (334,054) - (36,073) 18,695 - (7,502) (358,934) Computer equipment Cost 782,476 142,451 - (50,282) (4,708) 26,874 896,811 Accumulated depreciation (497,976) - (80,980) 47,345 4,578 (40,693) (567,726) Vehicles Cost 1,410,709 679,356 - (249,771) (170,145) 1,701 1,671,850 Accumulated depreciation (371,276) (231) (145,529) 11,673 61,988 (652) (444,027) Ongoing Imports Cost 3,502 3,053 - (5,288) - - 1,267 Leasehold improvements Cost 297,500 19,180 - (7,737) - 5,469 314,412 Accumulated depreciation (126,663) - (25,970) 7,188 - (6,700) (152,145) Total premises and equipment - cost 4,742,492 921,487 - (387,316) (180,769) 126,576 5,222,470 Total premises and equipment - accumulated depreciation (1,615,087) (231) (317,751) 87,814 66,566 (75,134) (1,853,823) Total premises and equipment, net 3,127,405 921,256 (317,751) (1) (299,502) (114,203) 51,442 3,368,647 (1) The difference with the Consolidated Statement of Income is the expense depreciation by the premises and equipment of the investments classified as assets held for sale, the amortization of intangible assets and impairment of other assets. See Note 25.2 Impairment, depreciation and amortization. As of December 31, 2018 the premises and equipment of Assets held for sale consist of: Premises and equipment Balance at January 1, 2018 Roll - forward Balance at December 31, 2018 Acquisitions Expenses depreciation Disposals Assets classified as held for sale Effect of changes in foreign exchange rate In millions of COP Fixtures and fittings Cost 111 - - - - (1) 110 Accumulated depreciation (95) - (9) - - 2 (102) Computer equipment Cost 113 - - - - 7 120 Accumulated depreciation (86) - (12) - - (14) (112) Vehicles Cost 142,647 84,344 - (1,850) (26,913) 12,453 210,681 Accumulated depreciation (33,221) (54) (24,833) 365 13,446 (2,044) (46,341) Total premises and equipment - cost 142,871 84,344 - (1,850) (26,913) 12,459 210,911 Total premises and equipment - accumulated depreciation (33,402) (54) (24,854 365 13,446 (2,056) (46,555) Total premises and equipment, net 109,469 84,290 (24,854) (1,485) (13,467) 10,403 164,356 As of December 31, 2017 Premises and equipment Balance at January 1, 2017 Roll - forward Balance at December 31, 2017 Acquisitions Expenses depreciation Disposals Assets classified as held for sale Subsidiary liquidation Effect of changes in foreign exchange rate In millions of COP Land Cost 334,499 4,050 - (904) - - (283) 337,362 Construction in progress Cost 32,883 48,849 - (76,066) - - (537) 5,129 Buildings Cost 1,185,296 130,766 - (27,041) - (5,973) 21,491 1,304,539 Accumulated depreciation (259,400) - (29,451) 3,449 - - 284 (285,118) Furniture and fixtures Cost 572,699 40,187 - (12,647) (111) (37) 1,184 601,275 Accumulated depreciation (300,731) - (39,912) 9,317 95 30 (2,853) (334,054) Computer equipment Cost 717,464 100,939 - (29,301) (6,025) (39) (562) 782,476 Accumulated depreciation (477,339) - (73,772) 46,358 5,740 18 1,019 (497,976) Vehicles Cost 1,461,628 650,232 - (305,457) (318,880) (32,845) (43,969) 1,410,709 Accumulated depreciation (387,491) (2,866) (144,159) 14,022 113,100 15,740 20,378 (371,276) Airplane Cost 60,614 - - (59,614) - - (1,000) - Accumulated depreciation (6,227) - (356) 6,480 - - 103 - Ongoing Imports Cost 1,929 6,472 - (4,744) - - (155) 3,502 Leasehold improvements Cost 248,358 61,284 - (7,812) - - (4,330) 297,500 Accumulated depreciation (68,485) - (28,631) (29,723) - - 176 (126,663) Total premises and equipment - cost 4,615,370 1,042,779 - (523,586) (325,016) (38,894) (28,161) 4,742,492 Total premises and equipment - accumulated depreciation (1,499,673) (2,866) (316,281) 49,903 118,935 15,788 19,107 (1,615,087) Total premises and equipment, net 3,115,697 1,039,913 (316,281) (1) (473,683) (206,081) (23,106) (9,054) 3,127,405 (1) The difference with the Consolidated Statement of Income is the expense depreciation by premises and equipment of the investments classified as assets held for sale, the amortization of intangible assets and impairment of other assets. See Note 25.2 Impairment, depreciation and amortization. As of December 31, 2018 and 2017, there were no contractual commitments for the purchase of premises and equipment, or premises and equipment pledged as collateral. As of December 31, 2018 and 2017, the assessment made by the Bank indicates there is no evidence of impairment of its premises and equipment.

INVESTMENT PROPERTIES

INVESTMENT PROPERTIES	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about investment property [abstract]
Disclosure of investment property [text block]	NOTE 10. INVESTMENT PROPERTIES The table below sets forth the reconciliation between the initial balance account and the balance at the end of the period, at fair value: December 31, 2018 December 31, 2017 In millions of COP Balance at the beginning of the year 1,657,409 1,581,689 Acquisitions 8,536 92,102 Sales/Write-offs (10,422) (71,955) Gains on valuation (1) 77,350 55,573 Balance at the end of the period (2) 1,732,873 1,657,409 (1) See note 24.4. Other operating income, net. (2) Between December 31, 2018 and 2017 there were no transfers in and out of Level 3 fair value hierarchy related with investment properties. See Note 29 Fair value of assets and liabilities. The valuation adjustments recorded by the Bank's related to its investment properties are detailed below: As of December 31, 2018 Type of asset Balance at the beginning of the year Appraisals Net increase (decrease) in investment properties Adjusted fair value at the ‎ end of the year (1) In millions of COP Buildings 1,425,585 59,895 (1,886) 1,483,594 Lands 231,824 17,455 - 249,279 Total 1,657,409 77,350 (1,886) 1,732,873 As of December 31, 2017 Type of asset Balance at the beginning of the year Appraisals Net increase (decrease) in investment properties Adjusted fair value at the ‎ end of the year (1) In millions of COP Buildings 1,355,717 49,721 20,147 1,425,585 Lands 225,972 5,852 - 231,824 Total 1,581,689 55,573 20,147 1,657,409 (1) Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC). Amounts recognized in the statement of income for the period. The table sets forth the main income recorded by the Bank related to its investment properties: December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Income from rentals 79,756 77,964 66,838 Operating expenses due to: Investment properties that generated income through rentals 16,531 21,012 21,254 Investment properties that did not generate income through rentals 1,630 2,295 2,495 Currently, there are no restrictions on the use or income derived from the buildings or lands that the Bank has as investment property. The fair value of the Bank’s investment properties for the year ending at December 31, 2018 and December 31, 2017, has been recorded according to the assessment made by independent external consulting companies that have the appropriate capacity and experience in performing those assessments. The appraisers are either approved by the Property Market Auctions of Colombia or are foreign appraisers, who are required to provide a second signature by a Colombia appraiser accredited by the Property Market Auctions. Fair value appraisals are carried out in accordance with IFRS 13. The reports made by the external consulting company contain the description of the valuation methodologies used, and key assumptions such as: discount rates, calculation of applied expenses and income approach, among others. The fair value of the investment properties is based on the comparative market approach, which reflects the prices of recent transactions with similar characteristics. Upon determining the fair value of these investment properties, the greater and best use of these investment properties is their present use. For further information about measurement techniques and inputs used by consulting companies, please see Note 29 Fair Value of assets and liabilities. As of December 31, 2018 and 2017, the Bank does not have investment properties held under financial leases.

INCOME TAX

INCOME TAX	12 Months Ended
	Dec. 31, 2018
Disclosure Of Income Tax [Abstract]
Disclosure of income tax [text block]	NOTE 11. INCOME TAX The income tax is recognized in each of the countries where the Bancolombia Group has operations, in accordance with the tax regulations in force in each of the jurisdictions. Assets and liabilities deferred tax is recognized on temporary differences arising from the future estimation of tax and accounting effects resulting from differences between assets and liabilities in the financial position statement and for tax purposes. In order to comply with the tax obligations in a timely and adequate manner, the Bancolombia Group analyzes and permanently interprets the current tax regulations applicable to its operations. 11.1. Components recognized in the income statement of the period: December 31, 2018 December 31, 2017 December 31, 2016 In millions of Colombian pesos Current tax Fiscal term 752,728 1,041,454 813,355 Prior fiscal terms (1) (146,837) 3,967 2,519 Total current tax 605,891 1,045,421 815,874 Deferred tax Fiscal term 223,544 193,177 360,958 Total deferred tax 223,544 193,177 360,958 Total tax 829,435 1,238,598 1,176,832 (1) The recoveries of previous periods for $ 85,921 was recognized in 2017 in Bancolombia as income. 11.2. Components recognized in Other Comprehensive Results (OCI) December 31, 2018 In millions of Colombian pesos Amounts before taxes Deferred tax Net after taxes Revaluation losses related to the defined benefit liability 37,325 (7,663) 29,662 Net income (loss) from financial instruments measured at fair value (16,873) 10,190 (6,683) Unrealized gains/(loss) on investments in associates and joint ventures using equity method. 2,581 (663) 1,918 Net profit (loss) on foreign investment hedge 458,943 172,870 631,813 Net 481,976 174,734 656,710 See Consolidated Statement of Comprehensive Income December 31, 2017 In millions of Colombian pesos Amounts before taxes Deferred tax Net after taxes Revaluation losses related to the defined benefit liability 3,753 (3,725) 28 Net income (loss) from financial instruments measured at fair value 17,548 9,789 27,337 Net profit (loss) on foreign investment hedge 449,640 (6,895) 442,745 Net 470,941 (831) 470,110 See Consolidated Statement of Comprehensive Income December 31, 2016 In millions of COP Amounts before taxes Deferred tax Net after taxes Remeasurement loss related to defined benefit liability 626 (10,966) (10,340) Net profit (loss) by financial instruments measured at fair value 208,276 24,341 232,617 Net 208,902 13,375 222,277 See Consolidated Statement of Comprehensive Income 11.3. Other revelations 11.3.1. Explanation of applicable fees The following are the nominal rates of the current tax in each of the countries where Grupo Bancolombia has operations subject to income tax: Companies domiciled in Colombia The current income tax rate in accordance with Law 1819 of 2016, for the taxable periods 2018, 2017 and 2016 was: 2018 2017 2016 Rent 33.00% 34.00% 25.00% CREE 0% 0% 9.00% Surcharge 4.00% 6.00% 6.00% Total 37.00% 40.00% 40.00% The deferred tax as of December 31, 2018 was calculated based on the temporary differences, taking into account the applicable rates for 2019 and following years, as follows: 2019 2020 2021 2022 onwards Rent 33.00% 32.00% 31.00% 30.00% Additional points 4.00% 3.00% 3.00% 0% Total 37.00% 35.00% 34.00% 30.00% Domiciled companies in other countries The current and deferred income tax rate, for the taxable periods 2017 and 2018 was: 2017 2018 2019 onwards Companies in Peru Rent 29.50% 29.50% 29.50% Companies in Panama Rent 25.00% 25.00% 25.00% Companies in El Salvador Rent 30.00% 30.00% 30.00% Companies in Guatemala Rent 25.00% 25.00% 25.00% 11.3.2. Amount of temporary differences in subsidiaries, branches, associates over which deferred tax was not recognized is: December 31, 2018 December 31, 2017 In millions of Colombian pesos Temporary differences Local Subsidiaries (442,739) (1,043,724 Foreign Subsidiaries (4,547,635) (4,533,672) In accordance with IAS 12 no deferred tax credit was recorded, because the administration can control the future time in which such differences are reversed and this is not expected to occur in the foreseeable future. 11.3.3. Temporary differences as of December 31, 2018 - Net effect of deferred tax assets and liabilities by company disclosed in the Financial Position Statement: December 31, 2018 December 31, 2018 December 31, 2017 December 31, 2017 In millions of Colombian pesos Company Deferred Tax Asset Deferred Tax Liability Deferred Tax Asset Deferred Tax Liability Arrendadora Financiera S.A. 94 299 Bagrícola Costa Rica S.A. 74 56 - Grupo Agromercantil Holding (13,566) - (29,924) Banca de Inversión Bancolombia S.A. (20,300) - (26,432) Banco Agrícola S.A. 67,527 46,328 - Bancolombia S.A. (1,245,807) - (1,368,062) Banistmo SA and Subsidiaries 198,958 96,533 - BIBA Inmobiliaria S.A.S. (19) - (5) Trust Fund "Lote Abelardo Castro" (123) - (188) Fiduciaria Bancolombia S.A. (4,265) 1,808 - Inversiones CFNS S.A.S. (1,011) - (700) Renting Colombia S.A. (22,450) - (5,466) Transportempo S.A.S 163 509 - Valores Banagrícola S.A. 19 10 - Valores Bancolombia S.A. 4,342 3,071 - Valores Simesa S.A. (10,754) - (9,421) Net Deferred Tax by Company 271,177 (1,318,295) 148,614 (1,440,198) Net Deferred Tax (1,047,118) (1,291,584) This section shows the net deferred tax resulting from each company and differs from the information in section 11.3.4, because there the deferred tax is disclosed according to its nature. 11.3.4. Asset and liability deferred tax detail without netting by company This section shows the deferred tax according to its nature and differs from the information in section 11.3.3, because there the deferred tax is shown net by company. Assets deferred tax with effect on Income Statement, OCI and Equity Deferred tax summary in balance sheet accounts December 31, 2017 With effects on Results With effects on OCI and Retained Profits Eliminations Reclassifications December 31, 2018 In millions of Colombian pesos Assets deferred tax Results 559,220 127,463 - (5,752) 23,870 704,801 Assets deferred tax OCI and Equity 43,645 - 435,826 - (1,595) 477,876 Net Deferred Tax 602,865 127,463 435,826 (5,752) 22,275 1,182,677 December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Asset Deferred Tax: Property and equipment 21,153 3,848 812 18,117 Employee Benefits 161,524 2,021 12,824 172,327 Deterioration assessment 204,910 207,296 59,306 56,920 Tax credits settlement 68,463 209 5,935 74,189 Financial Obligations 51,863 1,916 241,918 291,865 Investments evaluation 81 6,495 80,277 73,863 Other deductions 51,226 38,257 4,551 17,520 Total Asset Deferred Tax 559,220 260,042 405,623 704,801 December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Asset Deferred Tax: Net profit (loss) on foreign investment hedge 6,895 - 172,870 179,765 Employee Benefits 36,750 9,625 1,478 28,603 IFRS 9 implementation adjustment (1) - 17,614 287,122 269,508 Total Asset Deferred Tax 43,645 27,239 461,470 477,876 (1) Value recorded against retained earnings, not other comprehensive income (ORI) In accordance with the financial projections, it is expected in the future to generate sufficient liquid income to offset the items recorded as deductible deferred tax. These estimates start from the financial projections that were prepared taking into account the information of the Bancolombia Group's economic research, the expected economic environment for the next five years. The main indicators on which the models are based are GDP growth, loans growth and interest rates. In addition to these elements, the Bank's long-term strategy is taken into account. Liability deferred tax with effect on Income Statement, OCI and Equity Deferred tax summary in balance sheet accounts December 31, 2017 With effects on Results With effects on OCI and Retained Profits Eliminations Reclassifications December 31, 2018 In millions of Colombian pesos Liability deferred tax Results (1,784,575) (293,108) - (50,524) 6,206 (2,122,001) Liability deferred tax OCI and Equity (109,874) - 2,930 (663) (187) (107,794) Net Deferred Tax (1,894,449) (293,108) 2,930 (51,187) 6,019 (2,229,795) December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Liability Deferred Tax: Property and equipment (233,550) 16,225 26,005 (243,330) Lease restatement (455,610) 242,251 - (213,359) Deterioration assessment (6,412) 4,923 373,689 (375,178) Participatory titles evaluation (121,210) 40,084 58,837 (139,963) Derivatives' evaluation (56,726) - 121,744 (178,470) Goodwill (758,888) 18,818 118,779 (858,849) Properties received in payment (47,509) 2,563 32,097 (77,043) Other deductions (104,670) 76,659 7,798 (35,809) Total Liability Deferred Tax: (1,784,575) 401,523 738,949 (2,122,001) December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Liability Deferred Tax Employee Benefits (4,401) 721 237 (3,917) Investments evaluation (105,473) 14,247 4,057 (95,283) Investments in associates. Adjustment for equity method - - 663 (663) IFRS 9 implementation adjustment (1)(2) - - 7,931 (7,931) Total Liability Deferred Tax: (109,874) 14,968 12,888 (107,794) (1) Value recorded against retained earnings, not other comprehensive income (ORI) (2) Effect on Grupo Agromercantil Holding due to an increase in the investments evaluation Total deferred tax Deferred tax summary in balance sheet accounts December 31, 2017 With effects on Results With effects on ORI and Retained Profits Eliminations Reclassifications December 31, 2018 In millions of Colombian pesos Asset Deferred Tax: 602,865 127,463 435,826 (5,752) 22,275 1,182,677 Liability Deferred Tax (1,894,449) (293,108) 2,930 (51,187) 6,019 (2,229,795) Net Deferred Tax (1,291,584) (165,645) 438,756 (56,939) 28,294 (1,047,118) The deferred tax disclosed in section 11.1, corresponds to assets and liabilities deferred tax without eliminations amounting to COP 165,645 56,939 960 11.3.5. Reconciliation of the effective tax rate Reconciliation of the tax rate December 31, 2018 December 31, 2017 December 31, 2016 In millions of Colombian pesos Accounting profit 3,615,870 3,992,771 3,968,282 Applicable tax with nominal rate 1,337,872 1,597,108 1,587,313 Non-deductible expenses to determine taxable profit (loss) 266,246 356,350 255,435 Accounting and non-tax expense (income) to determine of taxable profit (loss) (168,134) (179,605) (217,056) Base Differences 486,193 341,828 (348,985) Fiscal and non-accounting expense (income) to determine of taxable profit (loss) (1) (579,660) (23,844) 23,381 Ordinary activities income exempt from taxation (235,560) (181,406) (121,917) Ordinary activities income not constituting income or occasional tax gain (133,211) (130,272) (111,027) Tax deductions (25,398) (184,620) (107,083) Goodwill Depreciation (218,277) (233,004) - Tax depreciation surplus (118,046) (177,936) (20,323) Tax rate effect in other countries (2) (92,125) (218,785) 72,144 Prior fiscal terms (146,837) 3,967 2,519 Other effects of the tax rate by reconciliation between accounting profit and tax expense (income) 456,372 268,817 162,431 Total tax 829,435 1,238,598 1,176,832 (1) The variation originates mainly from the Participation Method (current tax) and the tax recognition of derivatives (2) The variation originates in adjustments for eliminations to the consolidated financial statements. 11.4. Dividends 11.4.1 Dividend Payment If the parent company or any of its subsidiaries were to distribute dividends, they would be subject to the tax regulations of each of the countries where they are decreed. 11.4.2 Dividends received from Colombian Subsidiary Companies In accordance with the historical behavior of the dividends received by the Bank as Parent, of its national subsidiaries, which are part of the Business Group, it is expected that such dividends will not be subject to the income tax and will not be subject to withholding tax, in accordance with Law 1943 of 2018. 11.5 Tax contingent Liabilities and assets For the Consolidated Financial Statements as of December 31, 2017 and 2018, the Bancolombia Group, once the tax positions adopted in the statements subject to review by the tax authority were analyzed, considered it necessary to reverse and update the uncertain positions in accordance with the administrative acts undertaking during the year: Balance December 2017 Update Payments Reversal Balance December 2018 353,338 13,606 156,953 95,023 114,968 11.6 Tax credits The following is the detail of the fiscal losses and presumptive income excesses over net income in the Group's entities, which have not been used, as of December 31, 2018. Base Deferred tax recognized asset In millions of Colombian pesos 224,817 74,190 In the implementation of the provisions of IAS 12 "Income Tax", a deferred tax asset is recognized, provided that the company will have future taxable profits with which to charge this temporary difference. 11.7 Tax regulation applicable to current and deferred tax corresponding to fiscal periods 2017 and 2018. 11.7.1 Domiciled companies in Colombia Current tax a) The current tax from the 2017 taxable period is calculated based on the accounting information prepared under the regulatory technical accounting frameworks in force in Colombia established in Decree 2420 of 2015 and its amendments. The fiscal regulation applicable to fiscal years 2017 and 2018, were those established by Act 1819 of 2016 and the other current regulations according to the tax statute. b) Windfalls are taxed separately from ordinary income and are taxed at the 10% rate. c) The income tax is determined by the higher value between the taxable net income determined by the ordinary system and the presumed income determined on 3.5% of the net equity of the previous year. Wealth tax The Bancolombia Group recognized in the statement of financial position the payment of the tax on wealth installment corresponding to the 2017 fiscal term, in accordance with the provisions of Act 1739 of 2014. Deferred tax The assets and liabilities deferred tax as of December 2017 was measured taking into account the rates for the income tax established by Act 1819 of 2016; As of December 31, 2018, the measurement of the deferred tax was determined with the income tax rates, indicated in Act 1943 of 2018; taking into account the future periods in which the temporary differences are expected to be reversed. 11.7.2 Domiciled companies outside of Colombia The current tax is calculated based on the accounting information expressed under the accounting technical frameworks in force in each one of the jurisdictions where the Bancolombia Group has operations. The deferred tax as of December 31, 2018, was determined taking into account the fiscal regulations in force and applicable in each of the countries where the financial operations are carried out, using the tax rates applicable in the taxable years in which it expects to dispose of the assets or settle the liabilities. 11.7.3 Future fiscal impacts due to regulatory changes Domiciled companies in Colombia With the issuing of the Financing Act 1943 of 2018, on December 28, 2018, several changes were introduced to the tax system that will be applicable as of January 1, 2019: a) For financial institutions, the rate of income and supplementary taxes is modified and some points are added to the general rate, when the taxable income is equal to or greater than 120,000 TVU (Tax value unit) , as follows: Income tax and complementary 2019 2020 2021 2022 onwards Rate 33% 32% 31% 30% Additional points 4% 3% 3% 0% Total rate 37% 35% 34% 30% b) The rate of presumptive income on net equity is gradually reduced, as follows: to 1.5% for taxable years 2019 and 2020; and at 0% from the taxable year 2021. c) The rules for undercapitalization are modified, which will apply to interest arising from debts between national or foreign economic partners. The undercapitalization rule does not apply to tax payers subject to surveillance by the Financial Superintendency. d) The list of income that is not considered as a national source is modified as follows: Credits for the importation of merchandise, services and overdraws or bank overdrafts whose term is greater than 6 months are considered as national income. e) In the private equity funds, the income will be distributed among the subscribers or participants to the same title that the fund has received, under the same tax conditions that they would have if they were received directly by the subscriber or participant, with compliance of the following rules : i. When the shares of the fund are traded on a stock exchange subject to inspection and surveillance by the Financial Superintendence of Colombia, or ii. When the fund meets the following requirements:  Not to be owned directly or indirectly, by more than 50%, by the same effective beneficiary, or economically linked investment group or by members of the same family up to a 4th degree of consanguinity or affinity, who are taxpayers of the income tax and;  When none of the effective beneficiaries of the fund or related investor group or family group, individually or jointly, has control or discretion over distributions thereof. Without the fulfillment of the requirements, the income of the unitholders will be incurred in the same year in which they are received by the private equity fund. f) It is established as a general rule the deduction in the income tax of 100% of the taxes, rates and contributions actually paid during the year or taxable period, which have a causal relationship, but it is not possible to deduct taxes such as: income, equity and tax standardization. g) The industry and trade tax and billboards and panels may be taken as a tax deduction in the income tax, up to 50% of the tax, for the years 2019, 2020 and 2021. As of 2022 the deduction permitted will be 100%. h) The tax discount is created by the tax on sales paid in, the acquisition, construction or training and importation of productive real fixed assets, including the one associated with the necessary services to put them in conditions of use. i) The rules of the minimum sale price are modified, including the services and establishing that it may not be less than 85% of its commercial value. For shares that are not listed on the stock exchange, the sale price can not be less than the intrinsic value plus 30%. j) Changes in Dividends The withholding tax on dividends will have the treatment that is summarized below, according to the quality of the same and the type of taxpayer beneficiary of the dividend, as follows: 1. For the dividends decreed as enforceable as of December 31, 2018, the rules contained in the Act before the issuance of Act 1943 of 2018 will be maintained 2. For the dividends coming from profits that paid the tax in the company, that is, not levied, the following rules will be followed: i. Dividends received by natural persons resident in Colombia: If dividends are distributed to individual’s resident in Colombia, they will be taxed at a marginal rate of 0% to 15%. ii. Dividends received by legal, national or foreign persons, and by natural persons WITHOUT residence in Colombia: The withholding rate will be 7.5% 3. For the dividends coming from profits that did NOT paid the tax in the company, that is, levied, the following rules will be followed: Dividends will be levied at the general rate of income tax according to the year in which they are paid or credited (33% for 2019, 32% for 2020, 31% for 2021 and 30% from 2022). Once this withholding is deducted, the withholding rate mentioned in numeral 2 will be applied. The dividend distributed within the companies of a Business Group duly registered with the Chamber of Commerce is not subject to withholding. 4. Abroad Capital investment. To determine the income tax with respect to the profits obtained by the foreign capital investments of the portfolio, regardless of the modality or vehicle used to make the investment by the investor, the following rules shall apply: i. Dividends from profits that paid the tax in the company, that is, not levied, the rate will be 7.5% ii. For the dividends coming from profits that did NOT paid the tax in the company, that is, levied, the following rule will be followed: Dividends will be levied at the rate of 25% and the retention rate of 7.5% will be applied to the remainder. k) The inflationary component of financial yields will no longer be considered as a non constitutive income earning or windfall for natural persons. l) Regime of Colombian holding company A new regime of Colombian Holding Companies (CHC) is created for those companies whose main activity is the holding of securities, investments or shares holding in Colombian and/or foreign companies, and the administration of such investments. To be a beneficiary of this regime, a minimum direct or indirect participation of 10% of the capital of two or more companies described above must be guaranteed for a minimum period of 12 months. In addition, employ at least 3 people, have their own direction and make strategic decisions in Colombia regarding their investments and assets. Among main benefits of this regime are that dividends received from entities without residence in Colombia will be exempt from income tax in Colombia in turn and will not be subject to industry and Commerce tax. Dividends distributed by a CHC to residents are taxed with a right to a discount for taxes paid abroad from a foreign source income, those distributed to non-residents shall be understood as income from a foreign source. When the CHC disposes of its participation to an entity abroad, it will be exempt from income tax and it’s complementary. Domiciled companies outside of Colombia For the term of December 2018, there were no changes in the countries where Grupo Bancolombia has operations.

ASSETS HELD FOR SALE AND INVENT

ASSETS HELD FOR SALE AND INVENTORIES, NET	12 Months Ended
	Dec. 31, 2018
Disclosure of Assets Held For Sale And Inventories [Abstract]
ASSETS HELD FOR SALE AND INVENTORIES, NET [Text Block]	NOTE 12. ASSETS HELD FOR SALE AND INVENTORIES, NET The breakdown of inventories and assets held for sale, net of the Bank is as follows: Assets held for sale and inventories December 31, 2018 December 31, 2017 In millions of COP Inventories, net 290,605 164,516 Assets held for sale 345,423 212,487 Total inventories and assets held for sale, net 636,028 377,003 12.1 Inventories Due to the nature of the financial services provided by some subsidiaries of the Bank, when assets provided through operating or financial leases to third parties that do not exercise the purchase option or do not have a purchase option, once the agreement expires those assets are recorded as inventories, considering that in the course of the ordinary activities performed by such subsidiaries, those assets are routinely sold. The Bank's inventories at December 31, 2018 and 2017, are summarized as follows: Inventories December 31, 2018 December 31, 2017 In millions of COP Lands and buildings 250,543 117,339 Vehicles 41,853 45,741 Machinery 20,527 16,252 Total inventory cost 312,923 179,332 Impairment (22,318) (14,816) Total inventories, net 290,605 164,516 Impairment is recognized based on market price fluctuation due to the fact that the fair value is determined by the offering price less cost to sell. There are no inventories pledged as collateral for liabilities as of December 31, 2018 and 2017. 12.2 Assets held for sale The assets recognized by the Bank as assets held for sale correspond to machinery, equipment, motor vehicles, technology, and investment property, among others that have been received as foreclosed assets. The Bank's assets held for sale have a current plan to sale, which contains the details of the selling price allocation and the advertising and marketing plan of the assets. Furthermore, the plan specifies the conditions to proceed with the selling process, consisting of an offer made by the customer and then, the Management's approval to perform the sale. The total balance of assets held for sale, by operating segment, are detailed below: As of December 31, 2018 Assets held for sale Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Others Segment Total In millions of COP Machinery and equipment 2,696 2,860 - - - 5,556 Cost 3,065 3,090 - - - 6,155 Impairment (369) (230) - - - (599) Real estate for residential purposes 29,562 59,241 1,762 1,487 - 92,052 Cost 30,472 61,286 1,800 1,487 - 95,045 Impairment (910) (2,045) (38) - - (2,993) Real estate different from residential properties 452 23,624 - - - 24,076 Cost 998 23,822 - - - 24,820 Impairment (546) (198) - - - (744) Investments held for sale - - - - 19,128 19,128 Cost (1) - - - - 19,128 19,128 Impairment - - - - - - Assets related to Investments held for sale - - - - 204,611 204,611 Cost (2) - - - - 209,002 209,002 Impairment (3) - - - - (4,391) (4,391) Total assets held for sale 32,710 85,725 1,762 1,487 223,739 345,423 (1) In December 2017, the management launched the execution of a sale plan for the investments associated with Avefarma S.A.S, Glassfarma Tech S.A.S. and Panamerican Pharmaceutical Holding Inc., for this reason the investments are presented as "non-current assets held for sale". Management is still committed to a plan to sell the aforementioned investments. (2) These assets corresponded to Arrendamiento Operativo CIB S.A.C. and FiduPerú S.A. Sociedad Fiduciaria. (3) In September 2018, FiduPerú S.A. returned capital to its shareholders. At the end of the 2018 period, the Administration adjusted the book value of the asset based on the fair value of the company, recognizing an impairment in the Income Statement. As of December 31, 2017 Assets held for sale Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Others Segment Total In millions of COP Machinery and equipment 8,099 3,362 - 39 - 11,500 Cost 8,972 3,422 - 39 - 12,433 Impairment (873) (60) - - - (933) Real estate for residential purposes 8,346 12,257 2,586 665 - 23,854 Cost 8,431 12,859 2,645 885 - 24,820 Impairment (85) (602) (59) (220) - (966) Real estate different from residential properties 295 952 - 155 - 1,402 Cost 295 952 - 178 24 1,449 Impairment - - - (23) (24) (47) Investments held for sale - - - - 18,413 18,413 Cost (1) - - - - 18,413 18,413 Impairment - - - - - - Assets related to Investments held for sale - - - - 157,318 157,318 Cost (2) - - - - 157,318 157,318 Impairment - - - - - - Total assets held for sale 16,740 16,571 2,586 859 175,731 212,487 (1) In December 2017, the management launched the execution of a sale plan for the investments associated with Avefarma S.A.S, Glassfarma Tech S.A.S. and Panamerican Pharmaceutical Holding Inc., for this reason the investments are presented as "non-current assets held for sale". (2) These assets corresponded to Arrendamiento Operativo CIB S.A.C.; Capital Investments SAFI S.A. and FiduPerú S.A. Sociedad Fiduciaria. Since 2017, the Bank has the intention to sell its participation in the companies Arrendamiento Operativo CIB S.A.C.; Capital Investments SAFI S.A. (wound-up) and FiduPerú S.A. Sociedad Fiduciaria. Therefore, the Bank expects that their carrying amounts will be recovered principally through a sale transaction rather than through continuing use. As a result, these companies are disclosed in the Statement of Financial Position as assets held for sale. The sale is highly probable, and those companies are available for immediate sale subject only to customary terms for sale. In this regard, Bank is managing all the necessary authorizations to carry out the sale such as the approval of the Peruvian Superintendence of Banking and Insurance. The company Capital Investments SAFI S.A. was liquidated in the course of the year 2018. For further information about Arrendamiento Operativo CIB S.A.C transaction, see Note 33 Subsequent events. The breakdown of the major classes of assets and liabilities classified as held for sale is as follows: December 31, 2018 December 31, 2017 In millions of COP Assets Cash and cash equivalents 12,476 19,072 Financial assets investment - 2,486 Premises and equipment, net 164,356 109,469 Prepaid expenses 412 101 Tax receivables 7,093 8,028 Deferred tax 1,551 1,103 Assets held for sale 721 4,691 Other assets 22,393 12,368 Total assets (1) 209,002 157,318 Liabilities Borrowings from other financial institutions 150,254 90,109 Tax liabilities 1,054 611 Deferred tax liabilities 4,832 4,908 Other liabilities 7,456 7,348 Total liabilities 163,596 102,976 (1) In September 2018, the management adjusted the book value of FiduPerú S.A. Sociedad Fiduciaria based on the fair value of the company, recognizing an impairment in the Income Statement for COP 4,391. Assets held for sale had an impairment amounting COP 8,727 and COP 1,946 as of December 31, 2018 and December 31, 2017, respectively. The aforementioned impairment was mainly due to observable transactions with a sale price below the carrying value of assets less the estimated costs to sell.

OTHER ASSETS, NET

OTHER ASSETS, NET	12 Months Ended
	Dec. 31, 2018
Disclosure Of Other Assets [Abstract]
Disclosure Of Other Assets Explanatorys [text Block]	NOTE 13. OTHER ASSETS, NET As of December 31, 2018 and 2017 the Bank’s other assets, net consist of: Other Assets December 31, 2018 December 31, 2017 In millions of COP Tax advance 867,120 480,523 Marketable and non-marketable for sale assets 654,207 580,438 Prepaid expenses 346,012 287,550 Other receivables (1) 286,583 200,645 Assets pledged as collateral 253,546 192,036 Receivables related to abandoned accounts (2) 172,671 147,228 Receivable Sales of goods and service 141,098 117,540 Commission receivables 99,185 97,710 Accounts receivable from contracts with customers (3) 86,759 90,590 Balance in credit card clearning house 61,539 66,788 Interbank Borrowings not classified as cash equivalents 55,690 125,963 Operating leases 55,450 38,653 Commission for letters of credit 25,399 72,927 Debtors 22,054 10,510 Taxes receivable 4,882 7,199 Others 166,125 34,498 Total other assets 3,298,320 2,550,798 Allowance others (64,139) (71,761) Total other assets, net 3,234,181 2,479,037 (1) As of December 31, 2018, corresponds to reconciling items on correspondent banks and mortgage-backed securities´ interest. (2) The item corresponds to receivables related to the application of the Colombian Law 1777 of February 1, 2016, which establishes that entities holding accounts deemed abandoned must transfer the related amounts to a fund constituted and regulated by the Icetex (Governmental entity responsible for promoting high quality education in Colombia). (3) See Note 24.3 Fees and commissions.

DEPOSITS FROM CUSTOMERS

DEPOSITS FROM CUSTOMERS	12 Months Ended
	Dec. 31, 2018
Disclosure Of Deposits From Customers [Abstract]
Disclosure of deposits from customers [text block]	NOTE 14. DEPOSITS FROM CUSTOMERS The detail of the deposits as of December 31, 2018 and 2017 is as follows: Deposits December 31, 2018 December 31, 2017 In millions of COP Saving accounts 59,635,379 54,255,583 Time deposits 56,853,141 53,961,586 Checking accounts 24,098,073 22,065,647 Other deposits 1,541,878 1,676,399 Total 142,128,471 131,959,215 The following table details the time deposits (‘CDT’) issued by the Bank: CDT Effective interest rate December 31, 2018 Modality Minimum Maximum Carrying Value Fair value In millions of COP Less than 6 months 0.10% 6.75% 9,549,206 9,554,429 Equal to 6 months and less than 12 months 0.25% 7.50% 5,572,051 5,577,962 Equal to 12 months and less than 18 months 0.25% 7.25% 7,323,840 7,368,860 Equal to or greater than 18 months 0.01% 13.50% 34,408,044 35,084,415 Total 56,853,141 57,585,666 CDT Effective interest rate December 31, 2017 Modality Minimum Maximum Carrying Value Fair value In millions of COP Less than 6 months 0.10% 6.96% 7,536,280 7,535,719 Equal to 6 months and less than 12 months 0.20% 8.03% 5,711,157 5,718,827 Equal to 12 months and less than 18 months 0.20% 9.03% 8,062,290 8,146,366 Equal to or greater than 18 months 0.01% 18.29% 32,651,859 33,381,189 Total 53,961,586 54,782,101 The detail of CDT’s issued by the Bank by maturity is as follows: December 31, 2018 Period Carrying value Fair value In millions of COP Less than one year 37,911,658 38,216,970 1 to 3 years 12,753,264 12,965,241 3 to 5 years 4,559,122 4,663,087 More than 5 years 1,629,097 1,740,368 Total 56,853,141 57,585,666 December 31, 2017 Period Carrying value Fair value In millions of COP Less than one year 36,416,439 36,701,555 1 to 3 years 10,525,956 10,727,828 3 to 5 years 5,367,765 5,592,750 More than 5 years 1,651,426 1,759,968 Total 53,961,586 54,782,101

INTERBANK DEPOSITS AND REPURCHA

INTERBANK DEPOSITS AND REPURCHASE AGREEMENTS AND OTHER SIMILAR SECURED BORROWING	12 Months Ended
	Dec. 31, 2018
Disclosure of interbank deposits and repurchase agreements and other similar secured borrowing [Abstract]
Disclosure of interbank deposits and repurchase agreements and other similar secured borrowing [text Block]	NOTE 15. INTERBANK DEPOSITS AND REPURCHASE AGREEMENTS AND OTHER SIMILAR SECURED BORROWING The following table sets forth information regarding the money market operations recognized as liabilities in the statement of financial position: Interbank and repurchase agreements and other similar secured borrowing December 31, 2018 December 31, 2017 In millions of COP Interbank Deposits Interbank liabilities 1,374,222 1,084,591 Total interbank 1,374,222 1,084,591 Repurchase agreements and other similar secured borrowing Short selling operations 136,786 607,536 Temporary transfer of securities 2,178,769 2,628,592 Total Repurchase agreements and other similar secured borrowing (1) 2,315,555 3,236,128 Total money market transactions 3,689,777 4,320,719 (1) Total repo liabilities have maturities of less than 30 days. Offsetting of Repurchase and Resale Agreements For the Bank and its Colombian subsidiaries, substantially all of repurchase and resale activities are transacted under legally enforceable repurchase agreements that give the Bank, in the event of default by the counterparty, the right to liquidate securities held with the same counterparty. However, the local law for certain jurisdictions outside of Colombia is regarding to determine the enforceability of offsetting rights. The Bank does not offset repurchase and resale transactions with the same counterparty in the consolidated statement of financial position. The table below presents repurchases and resale transactions included in the consolidated statement of financial position at December 31, 2018 and 2017: As of December 31, 2018 Assets / liabilities gross Amounts offset in the statement of financial position Net balance presented in the statement of financial position Financial instruments as collaterals Assets / liabilities net In millions of COP Securities purchased under resale agreements (1) 931,820 - 931,820 (931,820) - Securities sold under repurchase agreements (2,315,555) - (2,315,555) 2,315,555 - Total repurchase and resale agreements (1,383,735) - (1,383,735) 1,383,735 - (1) The amount includes those presented as cash and cash equivalents and those presented as other assets. As of December 31, 2017 Assets / liabilities gross Amounts offset in the statement of financial position Net balance presented in the statement of financial position Financial instruments as collaterals Assets / liabilities net In millions of COP Securities purchased under resale agreements (1) 881,061 - 881,061 (881,061) - Securities sold under repurchase agreements (3,236,128) - (3,236,128) 3,236,128 - Total repurchase and resale agreements (2,355,067) - (2,355,067) 2,355,067 - (1) The amount includes those presented as cash and cash equivalents and those presented as other assets. For further information about offsetting of other financial assets and liabilities see Note 5 Financial assets investments and derivatives.

BORROWINGS FROM OTHER FINANCIAL

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS	12 Months Ended
	Dec. 31, 2018
Disclosure Of Borrowings Explanatory [Abstract]
Disclosure of borrowings [text block]	NOTE 16. BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS As of December 31, 2018 and 2017, the composition of the borrowings from other financial institutions measured at amortized cost is the following: Borrowings from other financial institutions December 31, 2018 December 31, 2017 In millions of COP Obligations granted by foreign banks (1) 11,217,308 7,958,450 Obligations granted by domestic banks 5,120,656 5,863,702 Total 16,337,964 13,822,152 (1) The Bank has recognized a financial liability with BAM Financial Corporation (BFC) amounting to USD 259.4 million as of December 31, 2018 and USD 243.2 million as of December 31, 2017, due to its obligation to pay cash in future to purchase the non-controlling shares of Grupo Agromercantil Holding pursuant to an outstanding put option expiring in 2024. The Bank will reclassify the liability to equity if the put expires unexercised. Obligations granted by domestic banks As of December 31, 2018 Financial entity Rate Maximum Rate Minimum December 31, 2018 In millions of COP Financiera de desarrollo territorial (Findeter) 10.19% 0.24% 2,591,423 Banco de comercio exterior de Colombia (Bancoldex) 15.46% 2.17% 1,205,958 Fondo para el financiamiento del sector agropecuario (Finagro) 14.54% 0.85% 634,048 Other private financial entities 7.92% 5.82% 689,227 Total 5,120,656 As of December 31, 2017 Financial entity Rate Maximum Rate Minimum December 31, 2017 In millions of COP Financiera de desarrollo territorial (Findeter) 11.30% 1.05% 2,587,598 Banco de comercio exterior de Colombia (Bancoldex) 10.86% 1.76% 1,528,435 Fondo para el financiamiento del sector agropecuario (Finagro) 14.90% 1.05% 728,558 Other private financial entities 8.89% 0.07% 1,019,111 Total 5,863,702 The maturities of financial obligations with domestic banks as of December 31, 2018 and 2017, are the following: Domestic December 31, 2018 December 31, 2017 In millions of COP Amount expected to be settled: More than twelve months after the reporting period 4,894,259 5,288,364 No more than twelve months after the reporting period 226,397 575,338 Total 5,120,656 5,863,702 Obligations granted by foreign banks As of December 31, 2018 Financial entity Rate Maximum Rate Minimum December 31, 2018 In millions of COP Financing with correspondent banks 5.66% 2.81% 10,140,356 Corporación Andina de Fomento (CAF) 5.01% 2.93% 529,464 Banco Latinoamericano de Comercio Exterior (Bladex) 4.89% 3.15% 473,549 Banco Interamericano de Desarrollo (BID) 5.64% 4.32% 73,939 Total 11,217,308 As of December 31, 2017 Financial entity Rate Maximum Rate Minimum December 31, 2017 In millions of COP Financing with correspondent banks 5.66% 1.48% 7,341,713 Corporación Andina de Fomento (CAF) 3.84% 1.85% 311,730 Banco Latinoamericano de Comercio Exterior (Bladex) 4.10% 1.90% 269,946 Banco Interamericano de Desarrollo (BID) 3.96% 3.96% 35,061 Total 7,958,450 The maturities of the financial obligations with foreign entities as of December 31, 2018 and 2017 are the following: Foreign December 31, 2018 December 31, 2017 In millions of COP Amount expected to be settled: No more than twelve months after the reporting period 9,743,905 7,037,043 More than twelve months after the reporting period 1,473,403 921,407 Total 11,217,308 7,958,450

DEBT INSTRUMENTS IN ISSUE

DEBT INSTRUMENTS IN ISSUE	12 Months Ended
	Dec. 31, 2018
Disclosure of debt securities in issue [Abstract]
Disclosure of debt instruments [text block]	NOTE 17. DEBT INSTRUMENTS IN ISSUE Duly authorized by the authority in each country bonds have been issued as follows: As of December 31, 2018 Issuer Currency Face value (2) Balance Rate Range Bancolombia S.A. Local COP 4,533,392 4,607,153 IPC (1) Bancolombia S.A. Foreign USD 3,237,466 10,452,432 2.60%-6.22%% Banco Agrícola S.A. Foreign USD 547,000 1,774,852 5.27%-7.17% Bancolombia Panamá S.A. Foreign USD 139,280 457,495 2.60%-3.50% Grupo Agromercantil Holding S.A. Foreign USD 300,939 986,476 0.25%-7.25% Banismo S.A. y filiales Foreign USD 606,635 1,980,824 2.65%-5.00% Bancolombia Puerto Rico Internacional Inc Foreign USD 8,499 28,001 2.70%-3.00% Total 20,287,233 (1) Consumer price index. (2) Face value is in US dollar for foreign currency bonds. As of December 31, 2017 Issuer Currency Face value (2) Balance Rate Range Bancolombia S.A. Local COP 5,162,515 5,247,501 5.59%-IPC (1) Bancolombia S.A. Foreign USD 3,242,405 9,532,927 1.90%-6.31% Banco Agrícola S.A. Foreign USD 547,000 1,622,238 5.36%-7.99% Bancolombia Panamá S.A. Foreign USD 260,310 784,567 1.90%-2.90% Grupo Agromercantil Holding S.A. Foreign USD 302,264 910,270 0.25%-7.25% Banismo S.A. y filiales Foreign USD 519,300 1,551,211 2.65%-3.65% Total 19,648,714 (1) Consumer price index. (2) Face value is US dollar for foreign currency bonds. The breakdown of the Bank securities in issue by maturity is as follows: As of December 31, 2018 Issuer Less than a year 1 to 3 years 3 to 5 years more than 5 years Total amortized cost In millions of COP Local currency Subordinated bonds (1) - - - 1,425,034 1,425,034 Ordinary bonds - - 154,813 3,027,306 3,182,119 Foreign currency Subordinated bonds (1) - - - 6,790,506 6,790,506 Ordinary bonds 652,579 339,419 159,721 7,737,855 8,889,574 Total 652,579 339,419 314,534 18,980,701 20,287,233 (1) The subordinated bonds, in the event of default of the Bank, will be subordinated to the claims of depositors and all other creditors of the issuer, other than creditors whose claims rank equally with, or are junior to, the claims of the holders of the subordinated liabilities. As of December 31, 2017 Issuer Less than a year 1 to 3 years 3 to 5 years more than 5 years Total amortized cost In millions of COP Local currency Subordinated bonds (1) - - 163,778 2,410,209 2,573,987 Ordinary bonds - - 802 2,672,712 2,673,514 Foreign currency Subordinated bonds (1) - - - 6,156,094 6,156,094 Ordinary bonds 535,020 758,879 44,740 6,906,480 8,245,119 Total 535,020 758,879 209,320 18,145,495 19,648,714 (1) The subordinated bonds, in the event of default of the Bank, will be subordinated to the claims of depositors and all other creditors of the issuer, other than creditors whose claims rank equally with, or are junior to, the claims of the holders of the subordinated liabilities. The following is a schedule of the debt instruments in issue by maturity: Issuer December 31, 2018 December 31, 2017 In millions of COP Amount expected to be settled: No more than twelve months after the reporting period 2,854,161 2,352,801 More than twelve months after the reporting period 17,433,072 17,295,913 Total 20,287,233 19,648,714 As of December 31, 2018 and 2017, there were no covenants linked to the aforementioned securities in issue, nor were any of these instruments past due by the Bank in relation to its financial obligations. Green Bonds Offering On July 18, 2018 Bancolombia S.A. completed the offering of ordinary bonds in an aggregate principal amount of COP 300,000 million with a term of 3 and 5 years and a rate of IPC + 2.60% and ICP +2.95%, respectively. The bonds are referred to as Green Bonds because the proceeds from the offering will be used to finance sustainability projects to combat the climate changes, associated with renewable energies and sustainable constructions. Issuance of Banistmo Bonds On September 12, 2017 Banistmo issued international bonds with a rate of 3.65% for a total amount of USD 500,000 due in 2022. The bonds were sold at a price of 99.778% with an initial return of 3.73%. The carrying amount recognized was USD 519,842. Subordinated Notes Offering On October 18, 2017, the Bank priced the public offering of USD 750,000 in aggregate principal amount of its Subordinated Notes due October 18, 2027. The Notes have a 10-year maturity, an optional redemption right on the fifth year and a coupon of 4.875%, payable semi-annually on April 18 and October 18 of each year, beginning on April 18, 2018. In connection with the Notes Offering, the Bank acquired USD 360,912 of its Notes due 2020 and USD 321,152 of its Notes due 2022, issued on July 26, 2010 and September 4, 2012, respectively, through a private exchange followed by a Dealer Intermediated Tender Offer. During the transaction, the Bank maintained a third party financial entity as a principal, which was responsible for the execution of the transfer and the exchange. In this regard the Bank has recognized as non-extinguishment the modification of the debt instruments in issue corresponding to a portion of the Notes due 2020 and Notes due 2022. The fees associated with the modified debt instruments amounted to USD 4,303 and, along with the unamortized premium or discount amounted to USD 11,233, were amortized as an adjustment of interest expense over the remaining term of the replacement or modified debt instruments using the interest method. For information related with the disclosures of fair value of the debt securities in issued, see Note 29 Fair value of assets and liabilities.

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	12 Months Ended
	Dec. 31, 2018
Disclosure of employee benefit plans [Abstract]
Disclosure of employee benefits [text block]	NOTE 18. EMPLOYEE BENEFIT PLANS The following table shows liabilities relating to post-employment benefit plans: Post-employment and long-term benefit plans December 31, 2018 December 31, 2017 In millions of COP Defined benefit pension plan 128,246 131,589 Severance obligation 30,732 38,041 Retirement Pension Premium Plan and Senior Management Pension Plan Premium 120,966 119,526 Other long term benefits 439,321 408,245 Post-employment and long-term benefit plans 719,265 697,401 These benefits include all types of payments that the Bank provides to its employees. The recognition of liabilities related to post-employment and long-term employee benefit plans is based on actuarial computations which involve judgments and assumptions made by management (with the assistance of actuaries) related to the future macroeconomic and employee demographic factors, among others, which will not necessarily coincide with the future outcome of such factors. Short-term employment benefit plans recognized in the Statement of Financial Position in the line “Other liabilities” consist of the following: Other employment benefit plans December 31, 2018 December 31, 2017 In millions of COP Current severance obligation (1) 113,654 106,334 Other bonuses and short-term benefits 351,697 336,285 Other employment benefit plans 465,351 442,619 (1) See severance obligation As of December 31, 2016, the amount recognized through Profit and Losses, due to benefit employee plans' current service cost and interest cost, was COP 165,577; on the other hand, COP 14,482 was recognized through other comprehensive income as a result of the net actuarial gain or loss due to change in assumptions, demographic experience and foreign currency translation effect. Bonuses and short-term benefits As of December 31, 2018 and 2017, the amounts of COP 351,697 and COP 336,285, respectively, were recognized by the Bank as bonuses related to private agreements in connection with the employees' variable compensation. Post-employment benefits Defined benefit pension plan Colombia Under Colombian law, employee pension obligations are managed as a defined contribution plan since 1990. The Bank’s legal retirement benefit obligation as of December 31, 2018 and 2017 relates to retired employees who rendered services to the Bank before the current regulations took effect. Under this unfunded plan, benefits are based on length of service and level of compensation. As of December 2018, 644 participants were covered by this plan, and as of December 2017, 671 participants. For purposes of the projected assessment of the pension plan obligation, in the absence of a deep market of high quality corporate debt, the sovereign bond curve of the Colombian Government is used, with maturity similar to the residual life of the obligation of the projected benefit. The net cost of pensions is accounted for in the Consolidated Statement of Income as “Salaries and employee benefits”, and includes the interest costs and cost of current service. Unfunded defined benefit pension plan of the Parent Company 2018 2017 In millions of COP Present value of the obligation as of January 1 125,480 123,282 Interest cost 7,547 8,117 Benefits paid (11,795) (11,553) Net actuarial (gain) / loss due to changes in demographic assumptions (2,220) 2,216 Net actuarial (gain) / loss due to plan experience 3,371 3,418 Defined obligation, unfunded as of December 31 122,383 125,480 Panama The pension plan for Banistmo and its subsidiaries provides for defined benefits based on average salary paid during the most recent 120 months before retirement and years of service of certain employees entitled to receive the benefits. The pension benefit vests after 10 years of service. As of December 31, 2018 and 2017, there were 60 participants (30 participants with deferred benefits and 30 participants receiving benefits), and 62 participants (31 participants with deferred benefits and 31 participants receiving benefits), respectively: Funded defined benefit pension plan of Banistmo 2018 2017 In millions of COP Present value of the obligation as of January 1 6,109 6,649 Interest cost 177 198 Actuarial (gain)/loss – experience (536) 68 Actuarial (gain)/loss - financial assumptions 46 61 Benefits paid from plan assets (405) (825) Foreign currency translation effect 472 (42) Defined obligation, unfunded as of December 31 5,863 6,109 Severance obligation Colombia Under Colombian labor regulations, employees hired before 1990 are entitled to receive one month’s salary for each year of service. This benefit accumulates and is paid to the employees upon their termination or retirement from the Bank, calculated based on the employees’ last salary base; however, employees may request advances against this benefit at any time. In 1990, the Colombian government revised its labor regulations for new employees to permit companies, subject to the approval of the employees, to transfer this severance obligation annually to private pension funds (this scheme of employee benefits is known as the current severance obligation). The Bank’s severance obligations relate to employees hired before 1990. As of December 2018 and 2017, 453 and 572 participants respectively, were covered by this plan. The balances recognized in the Statement of Financial Position are listed below: Defined benefit severance obligation plan 2018 2017 In millions of COP Present value of the obligation as of January 1 38,041 51,289 Current cost of service 1,598 2,562 Interest cost 2,333 3,419 Benefits paid (11,586) (11,298) Net actuarial loss/ (gain) due to assumption changes and plan experience 346 (7,931) Defined obligation, unfunded as of December 31 30,732 38,041 Current severance regimen 113,654 106,334 Total severance 144,386 144,375 Retirement Pension Premium Plan and Senior Management Pension Plan Premium Colombia Under Colombian labor regulations, employers and employees are entitled to negotiate compensation, other than the retirement benefit prescribed by law, by means of private agreements. The Bank’s employees participating in defined contribution plans are entitled to receive, on their retirement date, a one-time payment at the time based on the salary of the employee at their retirement date. On the other hand, the Bank has established a retirement benefit plan for its senior management executives. Under this plan, the executives are entitled to receive a one-time payment on their retirement date based on the number of years of service to the organization. El Salvador By means of Decree 592 of 2013, under Salvadorian labor regulations, employees are entitled to receive 15 days of salary for each year of service. This benefit is payable upon retirement, resignation, unjustified dismissal, death and disability. As of December 31, 2018 and 2017, there were 2,837 and 2,940 participants respectively, covered by the plan. Since 2018, Banagrícola S.A established a retirement benefit plan for its senior management executives. Under this plan, the executives are entitled to receive a one-time payment on their retirement date, death or disability based on the number of years of service to the organization. As of December 31, 2018 there was 1 participant covered by the plan. Guatemala Grupo Agromercantil Holding has established a retirement pension plan for its employees. Under this plan, the employees are entitled to receive a lifetime payment of 50% of their monthly nominal wage, if they are 70 years old and have 30 years of service, or if they are 65 years old and have 40 years of service. On the other hand, the employees are entitled to receive a lifetime payment of 70% of their monthly nominal wage, if they are 70 years old and have 40 years of service, or they are 65 years old and have 45 years of service. Panama Since 2018, Banistmo S.A established a retirement benefit plan for its senior management executives. Under this plan, the executives are entitled to receive a one-time payment on their retirement date, death or disability based on the number of years of service to the organization. As of December 31, 2018 there was 1 participant covered by the plan. The annual change of the present value of the obligations of defined benefit plans is as follows: Retirement Pension Premium Plan and Senior Management Pension Plan Premium 2018 2017 In millions of COP Present value of the obligation as of January 1 119,526 105,158 Current service cost 8,294 7,294 Interest cost 7,391 6,881 Benefits paid (6,590) (1,224) First time application effect of IAS 19 to new defined benefit obligation of Transportempo at December 31, 2017 (1) - 237 First time application effect of IAS 19 to new defined benefit obligation of Banistmo at December 31, 2018 (2) 2,479 - First time application effect of IAS 19 to new defined benefit obligation of Banagrícola at December 31, 2018 (3) 821 - Net actuarial (gain) / loss due to assumption changes and plan experience (4) (11,272) 1,195 Foreign currency translation effect 317 (15) Defined obligation, unfunded as of December 31 120,966 119,526 (1) Pursuant to a private agreement reached between Transportempo and its employees, the Bank’s subsidiary has decided to recognize a new employee benefit plan based on the employees’ seniority and their current salary at the moment when the service is vested. (2) Banistmo S.A has decided to recognize a new employee benefit plan for its senior management executives based on the number of years of service to the organization. (3) Banagrícola S.A has decided to recognize a new employee benefit plan for its senior management executives based on the number of years of service to the organization. (4) The increase in actuarial gains from experience adjustment is mainly due to a greater than expected reduction in the number of the Bank’s participants in the pension premium plan during the yaer ended as of December 31, 2018 Other long term benefits In addition to legal benefits and the aforementioned post-employment benefits, the Bank grants to its employees other benefits based on the employees’ seniority. For the periods ended December 31, 2018 and December 31, 2017, the reconciliation of the other long term benefits is set below: Other long term benefits 2018 2017 In millions of COP Present value of the obligation as of January 1 408,245 364,424 Current service cost 41,512 37,433 Interest cost 26,152 26,329 Benefits paid (45,104) (38,671) Unfunded benefit obligation assumed for Grupo Agromercantil at December 31, 2017 (1) - 340 First time application effect of IAS 19 to new defined benefit obligation of Renting at December 31, 2017 (2) - 614 Loss due to assumption changes and plan experience 4,360 16,893 Foreign currency translation effect 4,156 883 Defined obligation, unfunded as of December 31 439,321 408,245 (1) Former employees have been incorporated again in the Company’s payroll due to the private agreement reached between Comamesa (a Guatemalan subsidiary of Grupo Agromercantil and Serviva (security supplier). (2) Pursuant to a private agreement reached between Renting and its employees, the Bank’s subsidiary has decided to recognize a new employee benefit plan based on the employees’ seniority and their current salary at the moment when the service is vested. Plan Assets Colombia As of December 2018, the Bank established an asset plan to secure the benefits promised in the Senior Management Pension Plan Premium. The contributions made to the assets plan managed by the Fondo de Pensiones Protección S.A., will be invested 100% in the accumulation stage in the Balanced Growth portfolio, which will remain in the announced portfolio until 5 years before the pension age. (Currently, 57 years old for women and 62 years old for men). At that moment, 100% of the contributions will be transferred to the Conservative Balanced portfolio. The plan assets’ fair value as of December 31, 2018 is as follow: Bancolombia's asset plan 2018 2017 In millions of COP Retirement Pension Premium Plan 32,252 - Total 32,252 - 2018 2017 In millions of COP Fair value of assets as of January 1, - Employer contributions 32,252 - Fair value assets at the end of the year 32,252 - Banistmo The Bank, through its subsidiary Banistmo, has established a plan with assets to secure benefits promised by Banistmo to the employees entitled to receive the Pension Plan under the terms described above and to comply with Panama labor code, which specify the terms for securing the payments to be made in the event of an employee’s termination (voluntary or involuntary) or upon retirement (termination indemnity plan). Banistmo’s pension and post-retirement plan assets consider investments in fixed-term deposits and cash and due from banks, in order to reduce the investment risk. The plan assets are managed by a trustee (third party). Likewise, the assets allocation is periodically reviewed by Banistmo and, when necessary, adjusted according to the investment strategy. The plan's investment assets are measured at fair value using significant, unobservable market data and, therefore, are classified as Level 3. The expected return on assets assumption represents the long term rate of return based on analysis of historical returns, historical asset class volatilities and the fund’s past experience. The components of the periodic net cost of the plans previously mentioned and the total of charges (credits) recognized in the Consolidated Statement of Income are as follows: Banistmo asset plan December 31, 2018 December 31, 2017 In millions of COP Employee pension plan 4,884 4,765 Total 4,884 4,765 The following table details the change in plan assets: 2018 2017 In millions of COP Fair value of assets as of January 1 4,765 5,565 Interest income on plan assets 161 123 Return on plan assets greater/(less) than discount rate (33) (58) Benefits paid (405) (825) Foreign currency translation effect 396 (40) Fair value assets as of December 31 4,884 4,765 Defined contribution plans The expense recognized in the line “Salaries and employee benefits” of the Consolidated Statement of Income for defined contribution plans, for current severance regimen and pension benefits, is as follows: Defined contribution plans 2018 2017 In millions of COP Pension 182,991 171,713 Current severance regimen 57,130 54,510 Total 240,121 226,223 The economic assumptions used in the determination of the present value of the defined benefit plans, in nominal terms, are as follows: Colombia Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 6.90% 6.60% Rate of wage increase 5.70% 7.00% Projected inflation 3.40% 4.00% Bancolombia Panama Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 4.00% 3.00% Rate of wage increase 2.00% 3.00% Projected inflation 1.00% 2.00% Banistmo Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 4.00% 3.00% Expected long-term rate of return on plan assets 2.30% 2.10% Rate of wage increase 3.00% 3.00% El Salvador Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 4.10% 3.60% Rate of wage increase 2.50% 2.50% Projected inflation 1.50% 1.50% Guatemala Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 8.20% 8.20% Rate of wage increase 5.00% 5.00% Projected inflation 4.00% 4.00% In 2018, the assumption of mortality used in the preparation of the assessment of the estimated liabilities is based on tables RP-2000, CSO-80 and RV-08, which reflect average ages of mortality from 32-75 years. The rate used to discount the obligation of the defined benefit plan to reflect the duration of the labor liabilities as of December 2018 corresponds to the yield of sovereign bonds of each country where the plan is established, either Colombia, Panama, Guatemala and El Salvador, as applicable, since the market transactions of these countries involving corporate bonds of high quality have no high levels of activity. The assumption of the rate of inflation is based on the long term projection of the Central Bank of Colombia, Panama, Guatemala and El Salvador. The nature of the risks related to the obligations aforementioned are summarized below: Investment risk The present value of the obligation for the defined benefits plan is calculated using a discount rate determined with reference to high quality sovereign yields of each country. Currently, the plan includes investment in financial instruments that are not vulnerable to market risks Interest rate risks A reduction of the bond interest rates will increase the obligation of the plan Longevity risk The present value of the obligation of the defined benefit plan is calculated with reference to the highest estimate of the mortality of participants during their time of employment. An increase in the life expectancy of the participants will increase the plan obligation Salary risk The present value of the obligation of the benefit plan is calculated with reference to the future salaries of the participants. As such, an increase in the participants' wages will increase the obligation of the plan Estimated payment of future benefits The payments of benefits, which reflect future service rendered, are considered to be paid as follows: Years Pension Benefits Other benefits In millions of COP 2019 12,741 58,498 2020 12,820 52,205 2021 12,819 60,941 2022 12,723 67,609 2023 12,556 65,015 2024 to 2028 58,018 319,002 Sensitivity analysis Defined Benefit Obligations (DBO) was calculated using the Projected Unit Credit method. Obligations and expenses will change in the future as a result of future changes in the methods of projection and assumption, participant information, plan provisions and regulations, or as resulting from future gains and losses. Pension plan Bancolombia Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (4,342) Discount rate 6.40% 0.50% decrease 4,649 Salary increases 4.00% 0.50% increase 5,065 Salary increases 3.00% 0.50% decrease (4,763) Mortality Table RV-08 ("Rentistas Validos") One year increase in life expectancy 4,966 Retirement Pension Premium Plan Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (4,815) Discount rate 6.40% 0.50% decrease 5,318 Salary increases 6.50% 0.50% increase 5,370 Salary increases 5.50% 0.50% decrease (4,922) Severance obligation Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (755) Discount rate 6.40% 0.50% decrease 787 Salary increases 6.50% 0.50% increase 1,785 Salary increases 5.50% 0.50% decrease (1,734) Senior Management Pension Plan Premium Bancolombia Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (913) Discount rate 6.40% 0.50% decrease 959 Salary increases 6.50% 0.50% increase 956 Salary increases 5.50% 0.50% decrease (919) Senior Management Pension Plan Premium Banagricola Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.60% 0.50% increase (26) Discount rate 3.60% 0.50% decrease 27 Salary increases 3.00% 0.50% increase 27 Salary increases 2.00% 0.50% decrease (26) Senior Management Pension Plan Premium Banistmo Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.50% 0.50% increase (90) Discount rate 3.50% 0.50% decrease 95 Salary increases 3.50% 0.50% increase 94 Salary increases 2.50% 0.50% decrease (91) Pension Plan Banistmo Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.50% 0.50% increase (261) Discount rate 3.50% 0.50% decrease 283 Mortality Table RP-2000 One year increase in life expectancy 182 Other long term benefits Colombia Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (11,938) Discount rate 6.40% 0.50% decrease 12,762 Salary increases 6.50% 0.50% increase 12,800 Salary increases 5.50% 0.50% decrease (12,084) El Salvador Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.60% 0.50% increase (656) Discount rate 3.60% 0.50% decrease 712 Salary increases 3.00% 0.50% increase 112 Salary increases 2.00% 0.50% decrease (145) Guatemala Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 8.70% 0.50% increase (24,380) Discount rate 7.70% 0.50% decrease 29,625 Salary increases 5.50% 0.50% increase 28,711 Salary increases 4.50% 0.50% decrease (25,119) Mortality Table RP-2000 One year increase in life expectancy 27,661

OTHER LIABILITIES

OTHER LIABILITIES	12 Months Ended
	Dec. 31, 2018
Disclosure Of Other Liabilities Explanatory [Abstract]
Disclosure Of Other Liabilities Explanatory [text Block]	NOTE 19. OTHER LIABILITIES Other liabilities consist of the following: Other liabilities December 31, 2018 December 31, 2017 In millions of COP Payables 1,638,010 1,838,806 Suppliers 1,386,809 1,254,484 Advances (1) 1,043,611 393,007 Collection services 884,805 377,288 Employee benefits and bonuses (2) 351,697 336,285 Security contributions 341,872 356,498 Dividends (3) 267,468 16,182 Salaries and other labor obligations 265,337 245,369 Advances in leasing operations and loans 133,377 171,421 Liabilities from contracts with customers (4) 75,845 118,857 Provisions (5) 63,474 84,294 Deferred interests 44,598 84,824 Other (6) 271,350 519,167 Total 6,768,253 5,796,482 (1) For the year 2018 and 2017 advances includes the amount received by the Bank in balances related to insurance operations amounting to COP 67,136 and COP 54,967, respectively, balances held by court order amounting to COP 62,861 and COP 50,152, respectively, gain on derivatives first day valuation amounting to COP 55,573 and COP 39,706, respectively, excess cash amounting to COP 5,161 and COP 9,012, respectively and balances of credit cards charges pending to be applied amounting to COP 7,214 and COP 10,116. Additionally, for the year 2018, the line includes guaranteed deposits for capital market transactions in foreign currency for COP 459,966. (2) For further information related to other employee benefit plans, see Note 18 "Employees benefit plans". (3) The increase is due to the last installement payment effective for the dividends approved by the annual shareholders’ meeting that took place in 2018. (4) See Note. 24.3 " Fees and commissions" (5) See Note 20 "Provisions and contingent’s liabilities". (6) For further information see Note 11 “Income tax”

PROVISIONS AND CONTINGENT LIABI

PROVISIONS AND CONTINGENT LIABILITIES	12 Months Ended
	Dec. 31, 2018
Disclosure Of Provisions And Contingent Liabilities [Abstract]
Disclosure of other provisions, contingent liabilities and contingent assets [text block]	NOTE 20. PROVISIONS AND CONTINGENT LIABILITIES 20.1 Provisions The following tables show the detail of the provisions: As of December 31, 2018 Judicial proceedings Administrative proceedings Financial ‎ guarantees (1) loan ‎ commitments (1) Onerous contracts Total In millions of COP Balance at December 31, 2017 30,412 1,592 52,290 99,500 - 183,794 Effect of adoption of IFRS 9 - - (3,215) (8,574) - (11,789) Balance at January 1, 2018 30,412 1,592 49,075 90,926 - 172,005 Additions recognized in the year 22,281 7,272 7,708 21,922 2,759 61,942 Provisions used during the period (6,489) - (5) - - (6,494) Provisions reversed during the period (10,177) (8,395) (33,686) (13,713) - (65,971) Foreign currency translation adjustment 606 - 8 5,424 274 6,312 Effect of discounted cash flows 239 - - - - 239 Final balance at December 31, 2018 36,872 469 23,100 104,559 3,033 168,033 (1) The provisions for financial guarantees and loan commitments as of December 31, 2018 were estimated according to the expected credit losses methodology required by IFRS 9, on the other hand, the estimations for the year ended as of December 31, 2017 were computed under IAS 39, therefore both amounts are not comparable. For further information see Note 32 Impacts on application of new standards. As of December 31, 2017 Judicial proceedings Administrative proceedings Financial guarantees loan commitments Total In millions of COP Balance at January 1, 2017 29,135 1,312 77,366 100,748 208,561 Additions recognized in the year 23,396 302 55,539 27,198 106,435 Provisions used during the period (10,623) - - - (10,623) Provisions reversed during the period (11,504) - (80,615) (28,127) (120,246) Foreign currency translation adjustment (90) - - (319) (409) Effect of discounted cash flows 98 (22) - - 76 Balance at December 31, 2017 30,412 1,592 52,290 99,500 183,794 The following explains the significant changes in the provisions of financial guarantees and loan commitments during period at December 31, 2018 which were estimated using the expected credit loss model required by IFRS 9 (2014): Stage 1 Stage 2 Stage 3 TOTAL Balance at January 1, 2018 125,189 14,502 310 140,001 Net remeasurement of loss allowance (24,851) 3,239 17,602 (4,010) Transfer 12-month ECL (16,727) (20,644) (3,528) (40,899) Transfer Lifetime ECL not credit-impaired (5,216) 33,702 (7,769) 20,717 Transfer Lifetime ECL credit-impaired (2,908) (9,819) 28,899 16,172 Provisions used during the period 28,360 988 6,741 36,089 Provisions reversed during the period (20,459) (4,757) (24,637) (49,853) Translation adjustment 4,515 918 (1) 5,432 Balance at December 31, 2018 112,754 14,890 15 127,659 Judicial proceedings The judicial provisions refer to pending legal proceedings on employment matters, ordinary lawsuits, class actions suits, civil actions within criminal prosecutions and executive proceedings against the Bank. In the opinion of management, after receiving pertinent legal advice, the payments that will be made by these processes will not generate significant losses in addition to the provisions recognized as of December 31, 2018 and 2017, the Bank does not expect to obtain any kind of reimbursement from judicial proceedings raised against it and, therefore, has not recognized any assets for that purpose. Administrative proceedings During 2018 equity tax provisions for the year 2011 were reversed. Administrative proceedings provisions as of December 31, 2018 refers to success fees on the processes in tax litigation conducted by legal advisors. Financial guarantees In order to meet the needs of its customers, the Bank issues financial standby letters of credit and bank guarantees. These are commitments issued by the Bank to guarantee the performance of a customer to a third party and are mainly issued to guarantee agreements established between parties from the energy sector, private sector and public procurement contracts. The Bank expects most of those guarantees provided to expire before they are used. The events or circumstances that would require the Bank to perform under a guarantee are determined by the type of guarantee: Guarantees for the energy sector The Bank shall be responsible before the guarantee’s beneficiary in the following situations: • Breach of the contract signed by the guaranteed entity. • Lack of energy supply due to a low availability from the generating company (the guaranteed entity). Guarantees for public procurement The amount guaranteed should be reimbursed by the Bank to the beneficiary of the guarantee which is a Government entity, in case the contractor breaches the agreed terms or its legal obligations. Commitment issued by the Bank to guarantee the performance of a customer from the private sector The amount guaranteed should be reimbursed to the beneficiary of the guarantee in case of breach of agreed covenants by the customer guaranteed or upon its financial insolvency. As of December 31, 2018 Maturity Financial Guarantees In millions of COP Guarantees under 1 month 303,308 Guarantees greater than 1 month and up to 3 months 780,103 Guarantees greater than 3 months and up to 1 year 2,287,434 Guarantees greater than 1 year and up to 3 years 1,426,992 Guarantees greater than 3 year and up to 5 years 277,710 Guarantees greater than 5 years 177,828 Total 5,253,375 As of December 31, 2017 Maturity Financial Guarantees In millions of COP Guarantees under 1 month 960,268 Guarantees greater than 1 month and up to 3 months 1,230,687 Guarantees greater than 3 months and up to 1 year 2,946,250 Guarantees greater than 1 year and up to 3 years 1,224,061 Guarantees greater than 3 year and up to 5 years 149,238 Guarantees greater than 5 years 191,139 Total 6,701,643 The total amount outstanding is the maximum potential payments which represent a “worst-case scenario”, and do not reflect expected results. Loan commitments In order to meet the needs of its customers, the Bank issues loan commitments, letters of credit and bank guarantees. Loan commitments are those approved irrevocable loans, in which, despite having acquired a commitment to grant them, due to the contract or agreement or for any other reason they are still pending disbursement. Onerous contracts For the Bank an onerous contract is a contract in which the unavoidable costs of meeting the obligations under the contract exceed the economic benefits expected to be received under it. 20.2 Contingent liabilities The contingencies with a claimed amount higher than USD 5,000 by claimed amount against the Bank, with significant importance to be disclosed in notes to the financial statements as of December 31, 2018 are presented below: BANCOLOMBIA Constitutional Public Interest Action (“Acción Popular”) of Carlos Julio Aguilar, et al. This constitutional public interest action (“Acción Popular”) was filed by the plaintiff arguing that the restructuring of the Departamento del Valle’s financial obligations and the performance plan executed, allegedly violates the collective rights of the public administration’s morality and of the public funds of the Departamento del Valle. This action was on hold due to its merger with the constitutional public interest action filed by Carlos Aponte against various financial institutions. As of December 31, 2018, such proceeding is in the evidentiary stage, specifically in the practice of the expert opinion and no provisions have been made. Fiscal Responsibility Lawsuit (“Proceso de responsabilidad fiscal”) between Contraloría Departamental de Cundinamarca vs. GEHS, Bancolombia, et al. The Wastewater Treatments Plant Chía I Delicias Sur of the Municipality of Chía’s development was defined through a leasing agreement entered on September 28, 2015 by and between the Municipality of Chia (tenant) and Bancolombia S.A., valued at USD 5,846. The object of such agreement was the financing of the project, optimization, design and construction of the wastewater treatment plant PTAR Chía I Delicias Sur; as of December 31, 2018, the agreement was in the stage of advances (with payment of interest on the disbursements made to the supplier), which refers to the contractual stage in which they are delivered resources for the execution of the project in advance of the final payment. The current Mayor of the Municipality of Chía has conveyed anomalies he has found in the execution of the aforementioned project and, as a consequence of the aforementioned anomalies detected, the Contraloría de Cundinamarca initiated a fiscal responsibility lawsuit for an alleged patrimonial detriment in public funds of the amount of USD 5,846 against GEHS Global Environment and Health Solutions of Colombia (provider), Guillermo Varela Romero, Rafael Antonio Ballesteros Gómez, Luis Alejandro Prieto González and Bancolombia S.A. As of December 31, 2018, the fiscal responsibility lawsuit is in the evidentiary stage and has a provision of USD 1,126. DIAN The authority on taxes of Colombia Dirección de Impuestos y Aduanas (DIAN) imposed a sanction to Bancolombia for the amount of USD 6,101, for the alleged breach of the tax collection agreement, originated in recording errors, extemporaneity and delivery of documents. Bancolombia filed an appeal for a reconsideration of the sanction resolution. As of December 31, 2018, the process is pending for the DIAN to resolve said appeal for reconsideration filed by the Bank, As of December 31, 2018, the process has a provision of USD 1127. Bancolombia´s Judicial Litigations concluded during 2018 The following contingencies listed below are contingencies reported as of December 31, 2017 that were concluded in the Bank’s favor as of December 31, 2018: Case/Procedure Amount Termination/Decision Miles of USD Revocatory Action claim by Interbolsa S.A. Comisionista de Bolsa vs. Bancolombia 4,308 In Bancolombia’s favor BANITSMO Ordinary claim filed by Melenao Mora and Said Diaz: The plaintiffs claim the payment of the costs of the material and moral damages resulting from a criminal proceeding filed by Banistmo (28-10-2004) against them for alleged criminal acts that caused damage to the bank because of the issuance of credit lines to enterprises where they figured as legal representatives. The plaintiffs seek the payment of material and moral damages which according to their valuation amounts to USD 20,000. As of December 31, 2018 the claim is pending of the first instance judgment. The external counsel has labeled this contingency as remote. Ordinary claim filed by Deniss Rafael Perez Perozo, Carlos Pérez Leal and others. Promotora Terramar (a HSBC client) received USD 299 in payments through Visa Gift Cards issued by U.S Bank, as partial payment for two apartments in Panama City. The Credit Card Securities and Fraud Prevention department of the HSBC bank detected an irregular activity promoted by Promotora Terramar, when a deposit monitoring alert was activated due to the high number of cards with the same BIN and Bank. Therefore, pursuant to the Business Establishments Affiliate Agreement, HSBC held from Promotora Terramar´s accounts USD 287; nevertheless, after further investigations the money was refunded. The plaintiffs' claim a compensation of the material and moral damages caused, which according to their valuation amounts to USD 5,252. As of December 31, 2018, the process is suspended and pending of taking of evidence stage. Our external counsel has labeled this contingency as remote. BANCO AGRÍCOLA The authority on taxes of El Salvador, in accordance with the resolution of October 2018, determined that Banco Agrícola failed to pay and declare income taxes related to fiscal year 2014 for a total of USD 11,116 and the corresponding sanction. The Bank filed an appeal. In the Bank´s opinion, the General Directorate of Internal Tax made some fact and law errors. ARRENDADORA FINANCIERA S.A. ARFINSA SUBSIDIARY OF BANCO AGRÍCOLA Corporación de Alimentos S.A. de CV The plaintiffs claim alleged damages derived from funds wrongfully delivered to third parties that were not entitled to receiving said funds. The claim seeks USD 6,454. As of December 31, 2018 the process is in its taking of evidence stage. The external counsel has labeled this contingency as remote. BANCO AGROMERCANTIL Superintendencia de Administración Tributaria The Superintendence of Tax Administration of Guatemala (STA) contested the income tax return corresponding to the year 2014 and demanded an adjustment from the Bank valued in USD 6,752. Dany Ward Mcnab Valladares The plaintiff´s claim is the annulment of non- recourse debts that were made in favor of BAM and Mercom Bank by North Shore Development Company, S.A. and the recognition of damages. The action is based on the fact that North Shore Development Company, S.A., when giving the assets in payment, was left without enough equity to respond for an obligation in the plaintiff´s favor for US 21,175. The claim was defended in August 2018. The external counsel has labeled this contingency as remote.

CAPITAL

CAPITAL	12 Months Ended
	Dec. 31, 2018
Disclosure Of Capital [Abstract]
Disclosure of classes of share capital [text block]	NOTE 21. CAPITAL The subscribed and paid-in capital is the following: December 31, 2018 December 31, 2017 Authorized shares 1,400,000,000 1,400,000,000 Subscribed and paid-in shares: Ordinary shares with a nominal value of COP 500 pesos 509,704,584 509,704,584 Preferred shares with dividend without voting rights with nominal value of COP 500 pesos 452,122,416 452,122,416 Total shares 961,827,000 961,827,000 Subscribed and paid capital (nominal value) 480,914 480,914 Dividends declared The declaration, amount and payment of dividends are based on Bancolombia S.A.’s unconsolidated net income. Dividends must be approved at the ordinary annual shareholders’ meeting upon the recommendation of the Board of Directors. Under the Colombian Commercial Code, after payment of income taxes and appropriation of legal and other reserves, and after setting off losses from prior fiscal years, Bancolombia must distribute to its stockholders at least 50.00% of its annual net income or 70.00% of its annual net income if the total amount of reserves exceeds its outstanding capital, unless such minimum percentages are waived by an affirmative vote of the holders of 78.00% of the shares present at the stockholders’ meeting. Such dividend distribution must be made to all stockholders, in cash or in issued stock of Bancolombia, as may be determined by the stockholders, and within a year from the date of the ordinary annual stockholders’ meeting in which the dividend was declared. The payment of dividends must be made in cash during the next year since the date when the Annual Meeting takes place and for all the stockholders. If the payment is made in the Bank's own equity securities instead of cash, that situation has to be approved by the 80.00% of the subscribed common shareholders and the 80.00% of the subscribed preferred shares. The annual net profits of Bancolombia must be applied as follows: (i) first, an amount equal to 10.00% of Bancolombia’s net profits to a legal reserve until such reserve is equal to at least 50.00% of the Bank’s paid-in capital; (ii) second, to the payment of the minimum dividend on the preferred shares; and (iii) third, as may be determined in the ordinary annual stockholders’ meeting by the vote of the holders of a majority of the shares entitled to vote. Dividends declared with respect to net income earned in: Cash dividends per share (Stated in COP) 2018 1,092 2017 1,020 2016 950 2015 888 2014 830 2013 776 Preferred shares Holders of preferred shares are entitled to receive dividends based on the profits of the preceding fiscal year, after deducting losses affecting the capital and once the amount that shall be legally set apart for the legal reserve has been deducted, but before creating or accruing for any other reserve, of a minimum preferred dividend equal to one per cent (1.00%) yearly of the subscription price of the preferred share, provided this dividend is higher than the dividend assigned to common shares. If this is not the case, the dividend shall be increased to an amount that is equal to the per share dividend on the common shares. The dividend received by holders of common shares may not be higher than the dividend assigned to preferred shares. Payment of the preferred dividend shall be made at the time and in the manner established in the general shareholders’ meeting and with the priority indicated by Colombian law. Any stock dividend payable in common shares requires the approval of 80.00% or more of the shares present at a shareholders’ meeting, which will include 80.00% or more of the outstanding preferred shares. In the event that none of the holders of preferred shares is present at such meeting, a stock dividend may only be paid to the holders of common shares that approve such a payment.

APPROPRIATED RESERVES

APPROPRIATED RESERVES	12 Months Ended
	Dec. 31, 2018
Disclosure Of Appropriated Reserves [Abstract]
Disclosure Of Reserves And Other Equity Interest Explanatorys [text block]	NOTE 22. APPROPRIATED RESERVES As of December 31, 2018 and December 31, 2017 the appropriated retained earnings consist of the following Concept December 31, 2018 December 31, 2017 In millions of COP Appropriation of net income (1) 9,312,009 8,709,922 For Fiscal provisions (2) 276,640 196,318 Others 153,125 138,915 Total Appropiated reserves 9,741,774 9,045,155 (1) The legal reserve fulfills two objetives: to increase and maintain the company's capital and to absorb economic losses. Based on the aforementioned, this amount shall not be distributed in dividends to the stockholders. (2) Pursuant to Article 130 of Tax Statute, a non-distributable reserve to the shareholders must be established for the 70% of the diference between the accounting and the tax depreciation, when the tax depreciation is greater than the accounting depreciation.

UNCONSOLIDATED STRUCTURED ENTIT

UNCONSOLIDATED STRUCTURED ENTITIES	12 Months Ended
	Dec. 31, 2018
Disclosure of unconsolidated structured entities [abstract]
Disclosure of unconsolidated structured entities [text block]	NOTE 23. UNCONSOLIDATED STRUCTURED ENTITIES Nature and risks associated with the Bank’s interests in unconsolidated structured entities The term "unconsolidated structured entities" refers to all structured entities that are not controlled by the Bank. The Bank manages transactions with unconsolidated structured entities in the normal course of business to facilitate customer transactions and for specific investment opportunities. The table below shows the total assets of unconsolidated structured entities in which the Bank had an interest at the reporting date and its maximum exposure to loss in relation to those interests. As of December 31, 2018 Securitisations The Bank’s managed funds Total In millions of COP Total assets of the entities 1,969,887 128,257,719 130,227,606 The Bank’s interest-assets Investments at fair value through profit or loss 196,927 - 196,927 Investments at fair value through other comprehensive income 209,164 - 209,164 Loans and advances to customers - 5,417,235 5,417,235 Total assets in relation to The Bank’s interests in the unconsolidated structured entities 406,091 5,417,235 5,823,326 The Bank’s maximum exposure 406,091 5,417,235 5,823,326 As of December 31, 2017 Securitisations The Bank’s managed funds Total In millions of COP Total assets of the entities 2,110,967 120,320,401 122,431,368 The Bank’s interest-assets Investments at fair value through profit or loss 252,881 - 252,881 Investments at fair value through other comprehensive income 187,471 - 187,471 Loans and advances to customers - 3,626,152 3,626,152 Total assets in relation to The Bank’s interests in the unconsolidated structured entities 440,352 3,626,152 4,066,504 The Bank’s maximum exposure 440,352 3,626,152 4,066,504 The Bank invests in asset-backed securities issued by securitization entities for which underlying assets are mortgages originated by financial institutions. The Bank does not have a significant exposure to sub-prime securities. The asset-backed securities are denominated in local market TIPS and accounted for as investment at fair value through profit or loss. These asset-backed securities have different maturities and are generally classified by credit ratings. The Bank does not expect significant changes in those ratings. Also, the Bank retain beneficial interests in the form of servicing fees on the securitized mortgages. Revenues generated by the Bank´s asset management business, are derived from the following type of business lines: related trusts, mutual funds sold to individuals, corporate trusts, escrow accounts, private equity funds, and delegated tailor-made mandates from third parties. Generally, the revenues correspond to the fees received from the management of resources that are invested in several instruments, management of properties and premises related to real estate projects in progress. Likewise, fees from management of resources pledged by clients in order to guarantee commitments and obligations with third parties. Finally, fees from management of resources of government agencies and entities. On the other hand, there is no an additional exposure to loss, such as funding commitments with regards to the Bank’s involvement with those entities.

OPERATING INCOME

OPERATING INCOME	12 Months Ended
	Dec. 31, 2018
Disclosure of operating income and operating expense [Abstract]
Disclosure of other operating income (expense) [text block]	NOTE 24. OPERATING INCOME 24.1 Interest and valuation on investment The following table sets forth the detail of interest and valuation on financial asset instruments for the years ended December 31, 2018, 2017 and 2016: 2018 2017 2016 In millions of COP Debt investments, net 129,017 159,890 163,311 Net gains from investment activities at fair value through income statement Debt investments 472,357 699,841 579,403 Derivatives (22,575) (61,667) (4,750) Spot transactions (13,734) 3,517 (22,831) Repos (51,438) (116,268) (7,638) Total net gains from investment activities at fair value through profit and loss 384,610 525,423 544,184 Total Interest on investment securities 513,627 685,313 707,495 24.2. Interest expenses The following table sets forth the detail of interest on financial liability instruments for the years ended December 31, 2018, 2017 and 2016: 2018 2017 2016 In millions of COP Deposits (3,852,061) (4,279,316) (3,878,528) Debt instruments in issue (1,139,456) (1,191,000) (1,335,192) Financial borrowings (583,321) (672,472) (723,385) Preferred shares (58,714) (58,714) (58,714) Borrowings from other financial institutions (18,134) (15,860) (6,345) Other interest (18,530) (15,624) (50,936) Interest expenses (5,670,216) (6,232,986) (6,053,100) Net interest income includes interest earned on loans, ‘repos’ and investments less interest beared on deposits by customers, debt securities in issued, borrowing from other financial institutions and ‘repos’. At December 31, 2018, 2017 and 2016 net interest income amounted to COP 10,541,522, COP 10,584,976, and COP 9,818,313 respectively. 24.3 Fees and commissions The Bank has elected to present the income from contracts with costumes as an element in a line named “Fees and commissions income” in the consolidated statement of income separated from the other income sources. The information contained in this section about the fees and commission’s income presents information on the nature, amount, timing and uncertainty of the income from ordinary activities which arise from a contract with a customer under the regulatory framework of IFRS 15 Revenue from Ordinary activities from Contracts with Customers. In the following table, the description of the principle activities through which the Bank generates revenue from contracts with customers is presented: Fees and Commissions Description Banking services Banking Services are related to commissions from the use of digital or physical channels or once the customer makes a transaction. The performance obligation is fulfilled once the payment is delivered to its beneficiary and the proof of receipt of the payment is sent, in that moment, the collection of the commission charged to the customer is generated, which is a fixed amount. The commitment is satisfied during the entire validity of the contract with the customer. The Bank acts as principal. Credit and debit card fees In debit card product contracts, it is identified that the price assigned to the services promised by the Bank to the customers is fixed. Given that no financing component exists, it is established on the basis of the national and international interbank rate. Additionally, the product charges to the customers commissions for handling fees, at a determined time and with a fixed rate. For Credit Cards, the commissions are the handling fees and depend on the card franchise. The commitment is satisfied in so far that the customer has capacity available on the card. Other revenue received by the (issuer) credit card product, is advance commission; this revenue is the charge generated each time the customer makes a national or international advance, at owned or non-owned ATMs, or through a physical branch. The banking exchange rate is a revenue for the Issuing Bank of the credit card for the services provided to the business for the transaction effected at the point of sale. The commission is accrued and collected immediately at the establishment and has a fixed amount. In the credit cards product there is a customer loyalty program, in which points are awarded for each transaction made by the customer in a retail establishment. The program is administrated by a third party who assumes the inventory and claims risks, for which it acts as agent. The Bank, recognized it as a lower value of the revenue from the banking exchange rate. The rights and obligations of each party in respect of the goods and services for transfer are clearly identified, the payment terms are explicit, and it is probable, that is it takes into consideration the capacity of the customer and the intention of having to pay the consideration at termination to those entitled to change the transferred goods or services. The revenue is recognized at a point in time: the Bank satisfies the performance obligation when the “control” of the goods or services was transferred to the customers. Deposits Deposits are related to the services generated from the offices network of the Bank once a customer makes a transaction. The Bank generally commits to maintain active channels for the products that the customer has with the Bank, with the purpose of making payments and transfers, sending statements and making transactions in general. The commissions are deducted from the deposit account, and they are incurred at a point in time. The Bank acts as principal. Electronic services and ATMs Revenue received from electronic services and ATMs arises through the provision of services so that the customers may make required transactions, and which are enabled by the Bank. These include online and real-time payments by the customers of the Bank holding a checking or savings accounts, with a debit or credit card for the products and services that the customer offers. Each transaction has a single price, for a single service. The provision of collection services or other different services provided by the Bank, through electronic equipment, generate consideration chargeable to the customer established contractually by the bank as a fee. The Bank acts as principal and the revenueis recognized at a point in time. Brokerage Brokerage is a group of services for the negotiation and administration of operations for purchasing fixed revenue securities, equities and operations with derivatives in its own name, but on the account of others. The performance obligations are fulfilled at a point in time when the commission agent in making its best effort can execute the business entrusted by the customer in the best conditions. The performance obligations are considered satisfied once the service stipulated in the contract is fulfilled, as consideration fixed, or variable payments are agreed, depending on the service. It acts generally as principle and in some special cases as agent Remittance Revenue for remittance is received as consideration for the commitment established by the Bank to pay remittances sent by the remitting companies to the beneficiaries of the same. The commitment is satisfied at a point in time to the extent that the remittance is paid to the beneficiary. The price is fixed, but may vary in accordance to the transferred amount, due to the operation being dependent on the volume of operations generated and the transaction type. There is no component of financing, nor the right to receive consideration dependent on the occurrence or not of a future event. Acceptances, Guarantees and Standby Letters of Credit Banking Service from acceptances, guarantees and standby letters of credit which are not part of the portfolio of the Bank. There exist different performance obligations; the satisfaction of performance obligations occurs when the service is given to the customer The consideration in these types of contracts may include fixed amounts, variable amounts, or both, and the Bank acts as principal. The revenue is recognized at a point in time. Trust Revenue related to Trust are received from the administration of the customer resources in the business of investment trusts, property trusts, management trusts, guarantee trusts, for the resources of the general social security system, Collective portfolios and Private Equity Funds (PEF). The commitments are established in contracts independently and in an explicit manner, and the services provided by the Bank are not inter-related between the contracts. The performance obligation corresponds to performing the best management in terms of the services to be provided in relation to trust characteristics, thus fixed and variable prices are established depending on the complexity of the business, similarly, revenues are recognized throughout or at a determined time, in all the established businesses it acts as principal. Securities brokerage Valores Bancolombia makes available its commercial strength for the deposit, reinvestment of resources through financial instruments to the issuing company. It receives a payment for deposits made. The commitment of the contract is satisfied to the extent that the resources requested by the issuer are obtained through the distribution desks of Valores Bancolombia. The collection is made monthly. It is established that Valores Bancolombia may undertake collection of these commissions at the end of the month through a collection account charged to the issuer, acting as principal. Bancassurance The Bank receives a commission for collecting insurance premiums at a determined time and for permitting the use of its network to sell the insurances of different insurance companies over a period of time. The Bank in these bancassurance contracts acts as agent (intermediary between the customer and the insurance company), since it is the insurance company which assumes the risks, and which handles the complaints and claims of the customers inherent in each insurance. Therefore, the insurance company acts as principal before the customer. The prices agreed in bancassurance are defined as a percentage on the value of the policy premiums, the payment shall be tied to the premiums collected, sold or taken for the case of employees’ insurance. The aforementioned then means that the price is variable, since, the revenue will depend on the quantity of policies or calculations made by the insurance companies. Collections The Bank acting as principal, commits to collect outstanding invoices receivable by the collecting customers through the different channels offered by the bank, send the information of the collections made and credit the money to the savings or checking account defined by the collecting customer. The commitment is satisfied at a point in time to the extent that the money is collected by the different channels, the information of the said collections is delivered appropriately, and the resources are credited in real-time to the account agreed with the customer. For the service, the Bank receives a fixed payment, which is received for each transaction once the contract is in effect. Services These are the maintenance services performed on the fleet owned by the customers, these services are performed on demand, and the value of the service cost is invoiced plus an intermediation margin. The collection is made by the amount of expense invoiced by the provider plus an intermediation percentage, which ranges between 4% and 12% depending on the customer. The contract is written, is based on a framework contract which is held between the customers which contains the general terms of negotiation, the payment terms are generally 30 days after generating the invoice. The revenue is recognized at the time in which the service is provided. There is no financing nor sanctions for early cancellations. In logistic operation services the contract is written, with a defined duration, and details the rights and obligations of the parties. In general terms, the Bank commits to provide to customers merchandise transport services, which includes the driver, fuel, maintenance, tolls and other elements required to carry out the routes requested by the customer. Once the trip is finished, the price is variable and is determined by the average cost per route, which is updated at the start of the year. At the end of the month an adjustment is made to this price, with the actual costs incurred in the operation, such as the fuel, tolls, handling, maintenance, administrative expenses, among others. To view the details of the balance, refer to line ‘Services’ in note 24.4 Other operational Income Gains on sale of assets These are the revenue from the sale of assets, which the sale value is higher than the book value recorded in the accounts, the difference generates these profits. The recognition of the revenue is at a point in time once the sale is realized. The Bank acts as principal in this type of transactions and the price is determined by the market value of the asset being sold. To view the details of the balance, refer to line ‘Gain on sale of assets’ in note 24.4 Other operational Income Investment Banking Investment Banking offers to customer’s financial advisory services in the structuring of businesses in accordance to the needs of each one of them. The advisory services consist in realizing a financial structuring of a credit or bond in which the Investment Bank offers the elements so that the company decides the best option for structuring the instrument. In the financial advisory contract, a best efforts clause is included. The promises given to the customers are established in the contracts independently and explicitly. The services provided by the Invesment Bank are not interrelated between the contracts, correspond to the independent advice agreed and do not include additional services in the commission agreed with the customer. The advisory services offered in each one of the contracts are identifiable separately from the other performance commitments that the Investment Bank may have with the customers. The Investment Bank does not have a standard contract for the provision of advisory services, given than each contract is tailored to the customer’s needs. The transaction price is defined at the start of the contract and is assigned to each service provided independently. The price contains a fixed and a variable portion which is provided in the contracts. The variation depends on the placement amount for the case of a financial structuring contract and coordination of the issuance and conditions of the same. In these operations Banca de Inversion Bancolombia provides advice to the customers and the price shall depend at times on the success and amount of the operation. In the contracts subject to evaluation there are no incremental costs associated with the satisfaction of the commitments of the Bank with the customers provided for. In the contracts signed with the customers, a penalty clause is established in case of a customer withdrawing from continuing with the provision of the services established in the commercial offer. The penalty shall be recognized in the financial statements once the Investment Bank is notified on the withdrawal under the concept of charges for early termination of the contract. In accordance with IFRS 15, the tables below disaggregate in more detail than disclosed in the Bank’s annual report in 2017, revenue from contracts with customers, considering the nature of the services offered by the Bank and the information regularly reviewed by the chief operating decision maker. The Bank presents the information on revenue from contracts with customers in accordance with its operating segments defined earlier in Note 3 Operating Segments for each of the principal services offered. The following table shows the balances categorized by nature and by segment of revenue from ordinary activities from contracts with customers as at December 31, 2018, 2017 and 2016: As of December 31, 2018 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off Shore All Other Segments Total before eliminations Adjustments for consolidation ‎ purposes (1) Total after eliminations Revenue from contracts with customers Fees and Commissions Banking services 370,671 66,569 85,615 39,610 - - - 12,783 - 575,248 - 575,248 Credit and debit card fees and commercial estabilshments 1,258,047 185,466 97,163 66,731 - - - 3,707 - 1,611,114 - 1,611,114 Brokerage - 7,033 - 29 - - 20,012 - - 27,074 - 27,074 Acceptances, Guarantees and Standby Letters of Credit 33,313 15,352 4,749 3,055 - - - 897 - 57,366 - 57,366 Trust - 8,184 1,411 645 313,886 - 81,502 37 104 405,769 - 405,769 Securities brokerage - 1,200 1,212 - - 20,262 9,530 - - 32,204 - 32,204 Bancassurance 495,232 28,466 112 - - - - - - 523,810 - 523,810 Payment and collections 559,139 - - 4,084 - - - - - 563,223 - 563,223 Others 124,900 492 36,852 27,099 22 9 2,926 3,416 2,884 198,600 (149) 198,451 Total revenue from contracts with customers (1) 2,841,302 312,762 227,114 141,253 313,908 20,271 113,970 20,840 2,988 3,994,408 (149) 3,994,259 (1) For further information about composition of Bank’ segments see Note 3 As of December 31, 2017 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off Shore All Other Segments Total before eliminations Adjustments for consolidation purposes Total after eliminations Revenue from contracts with customers (1) Fees and Commissions Banking services 335,101 177,930 80,672 38,643 - - - 15,821 - 648,167 - 648,167 Credit and debit card fees and comercial 1,080,814 80,348 89,330 51,175 - - - 2,876 - 1,304,543 - 1,304,543 Brokerage - 2,302 - 35 - - 20,593 - - 22,930 - 22,930 Acceptances, Guarantees and Standby Letters of Credit 41,077 15,699 4,080 2,210 - - - 404 - 63,470 - 63,470 Trust - 4,510 1,335 713 285,648 - 68,180 36 (58) 360,364 - 360,364 Securities brokerage - 2,702 - - - 28,747 6,778 - 843 39,070 - 39,070 Bancassurance 427,190 23,847 - - - - - - 85 451,122 - 451,122 Payments and collections 531,567 - - 4,369 - - - - - 535,936 - 535,936 Others 115,472 10,415 35,742 28,877 - - 1,634 253 3,119 195,512 - 195,512 Total revenue from contracts with customers 1 2,531,221 317,753 211,159 126,022 285,648 28,747 97,185 19,390 3,989 3,621,114 - 3,621,114 (1) For further information about composition of Bank’ segments see Note 3. As of December 31, 2016 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off Shore All Other Segments Total before eliminations Adjustments for consolidation purposes Total after eliminations Revenue from contracts with customers (1) Fees and Commissions Banking services 329,114 159,015 75,732 37,831 - - - 12,343 - 614,035 4,774 618,809 Credit and debit card fees and comercial 803,731 84,152 87,862 4,771 - - - 4,634 - 985,150 188,752 1,173,902 Brokerage - 5,195 - 45 - - 23,390 - - 28,630 - 28,630 Acceptances, Guarantees and Standby Letters of Credit 45,664 18,406 3,485 2,554 - - - 607 - 70,716 - 70,716 Trust - 4,011 1,075 712 239,610 - 49,903 - - 295,311 - 295,311 Securities brokerage - - 834 - - 19,843 3,700 - - 24,377 - 24,377 Bancassurance 355,523 20,885 64 - - - - - - 376,472 - 376,472 Payments and collections 480,611 - - 6,245 - - - - - 486,856 - 486,856 Others 48,375 189 34,571 29,579 - - 3,578 12,679 1,699 130,670 94,190 224,860 Total revenue from contracts with customers 1 2,063,018 291,853 203,623 81,737 239,610 19,843 80,571 30,263 1,699 3,012,217 287,716 3,299,933 (1) For further information about composition of Bank’ segments see Note 3. For the determination of the transaction price, the Bank assigns to each one of the services the amount which represents the value expected to be received as consideration for each independent commitment, which is based on the relative price of independent sale. The price that the Bank determines for each performance obligation is done by defining the cost of each service, related tax and associated risks to the operation and inherent to the transaction plus the margin expected to be received in each one of the services, taking as references the market prices and conditions, as well as the segmentation of the customer. In the transactions evaluated in the contracts, changes in the price of the transaction are not identified. Contract Assets The Bank receives payments from customers based on the provision of the service, in accordance to that established in the contracts. When the Bank incurs costs for providing the service prior to the invoicing, and if these are directly related with a contract, they improve the resources of the entity, and are expected to recuperate corresponding to a contract asset. Currently, the Group does not have assets related to contracts with customers. As a practical expedient, the Bank recognizes the incremental costs of obtaining a contract as an expense when the amortisation period of the asset is one year or less. Contract Liabilities The contract liabilities constitute the obligation of the Bank to transfer the services to a customer, for which the Group has received a payment on the part of the final customer or if the amount is due before the execution of the contract. They also include deferred income related to services that shall be delivered or provided in the future, which will be invoiced to the customer in advance, but which are still not due. The contract liabilities decreased COP 43,012 in 2018.The changes in contract liabilities are due to performance circumscribed in the contract. The following table shows the detail of accounts receivable, and contract liabilities balances as at December 31, 2018 and 2017: 2018 2017 2016 in millions of COP Accounts receivable from contracts with customers (1) 86,759 90,590 57,567 Contract liabilities 75,845 118,857 34,487 (1) The impairment corresponding to the receivable accounts from contracts from customers is COP 11,975, COP 9,639 and COP 1,069 for the year 2018, 2017 and 2016 respectly. Fees and Commissions Expenses Fees and Commissions Expenses 2018 2017 2016 in millions of COP Banking services (542,628) (508,462) (473,109) Call center and web page (309,403) (291,602) (260,006) Others (361,025) (275,051) (235,855) Expenses for commissions (1,213,056) (1,075,115) (968,970) 24.4 Other operating income, net The following table sets forth the detail of other operating income net for the years ended December 31, 2018, 2017 and 2016: Other operating income 2018 2017 2016 In millions of COP Operating leases 624,062 563,861 493,486 Net foreign exchange (205,798) 294,068 132,292 Derivatives Foreign exchange contracts 267,189 21,917 164,172 Services (1) 170,459 164,150 167,914 Investment property valuation 77,350 55,573 149,299 Gains on sale of assets 75,976 40,600 60,282 Insurance (2) 54,679 49,640 49,679 Other reversals 47,657 140,012 37,767 Hedging 14,158 (3,678) (5,985) Penalties for failure to contracts 16,302 19,881 14,634 Others 61,768 232,185 203,115 Total Other operating income 1,203,802 1,578,209 1,466,655 (1) Corresponds to income from contracts with customers. To see more information see Note 24.3 Commissions. The gains on sale of portfolio in December 2018 and 2017 amounts to 14,707 and 13,928, respectively. (2) Corresponds to income from Seguros Agromercantil insurance operations. 24.5 Dividends received, and share of profits of equity method investees The following table sets forth the detail of dividends received, and share of profits of equity method investees for the years ended December 31, 2018, 2017 and 2016: 2018 2017 2016 In millions of COP Dividends (1) 67,582 32,248 39,785 Equity investments (2) 86,399 (19,680) 77,799 Equity method (3) 187,814 253,602 60,254 Gains (Losses) on sale of Discontinued Operations - - (1,146) Total dividends received, and share of profits of equity method investees 341,795 266,170 176,692 (1) Dividends received from equity investments at fair value through profit or loss as of 31, December of 2018, 2017 and 2016 amount COP 54,477, COP 20,297 and COP 30,468, respectively. Dividends from equity investments at fair value through OCI amount COP 13,105, COP 11,951 and COP 9,317, respectively. As of December 31, 2018, 2017 and 2016, the amount includes dividends of investments derecognised for COP 950, COP 1,556 and COP 1,638, respectively. (2) As of December 31, 2018, there is a profit on capital investments due to the increase in fair value in the portfolio measured at fair value through profit or loss held by Banagricola S.A. (3) For further information, see note 7 investments in associates and joint ventures.

OPERATING EXPENSES

OPERATING EXPENSES	12 Months Ended
	Dec. 31, 2018
Disclosure of operating expenses [Abstract]
Disclosure of general and administrative expense [text block]	NOTE 25. OPERATING EXPENSES 25.1. Other administrative and general expenses The detail for administrative and general expenses for the years ended December 31, 2018, 2017 and 2016 is as follows: Other administrative and general expenses 2018 2017 2016 In millions of COP Maintenance and repairs 585,377 530,284 448,017 Others Fees 429,121 427,517 411,521 Insurance 331,430 303,501 286,384 Leasing 256,872 244,956 246,445 Transport 183,857 158,561 154,220 Data processing 147,294 130,125 101,347 Advertising 144,900 127,142 120,046 Frauds and claims (1) 117,032 134,087 72,860 Public services 108,420 107,727 114,840 Cleaning and security services 97,848 92,359 93,336 Communications 73,072 67,201 61,943 Contributions and affiliations 66,636 60,320 59,406 Disputes, fines and sanctions (2) 63,685 139,146 52,441 Useful and stationery 63,321 58,145 61,699 Properties improvements and installation 52,937 59,121 55,307 Travel expenses 37,006 38,037 37,112 Trust 31,100 25,901 13,176 Legal and financial consultant 31,072 25,855 29,435 Production and supply cards 26,575 32,975 29,532 Real estate management 23,694 21,817 19,262 Board of directors and audit fee 21,733 20,450 20,926 Donations 17,402 17,048 18,338 Storage services 15,664 16,162 14,157 Activities Joint Operations 8,719 9,650 8,805 Temporary services 3,724 3,907 7,232 Legal expenses 3,570 4,112 5,897 Public relations 2,899 5,912 5,101 Others 79,809 115,866 102,549 Total other administrative and general expenses 3,024,769 2,977,884 2,651,334 Wealth tax, contributions and other tax burden (2) 692,666 727,661 741,184 (1) The increases in frauds and claims during the year 2018 and 2017 compared with the level of expense recognized as of December 31, 2016, are mainly explained by higher operational risk in virtual transactions and transactions with credit and debit cards. (2) The increase in disputes, fines and sanctions during the year 2017 is caused by the recognition of an income tax provision related with a potential exposure for the fiscal year 2014, consisting in an unrecognized tax benefits amounting to COP 201,554 in income tax liabilities related to tax positions. The 2014 income tax return has been subject to review from the tax authority since April 23, 2015. 25.2. Impairment, depreciation and amortization The detail for Impairment, depreciation and amortization for the years ended December 31, 2018, 2017 and 2016 is as follows: Impairment, depreciation and amortization 2018 2017 2016 In millions of COP Depreciation of premises and equipment 342,605 316,281 329,258 Amortization of intangible assets 123,551 116,752 149,776 Impairment of other assets (1) 27,746 46,078 38,775 Total impairment, depreciation and amortization 493,902 479,111 517,809 (1) The detail of the impairment of other assets net by operating segments for the years ended December 31, 2018, 2017 and 2016 is presented in the table below: 2018 2017 2016 In millions of COP Banking Colombia 20,036 33,889 15,078 Banking Panamá 6,523 5,495 1,934 Banking Guatemala 2,672 1,939 2,118 All other segments 812 1,418 - Brokerage 13 - - Off Shore (173) (26) (60) Banking El Salvador (2,137) 3,363 19,705 Total 27,746 46,078 38,775 During 2018 and 2017 there were no significant cybersecurity breaches according to the data security policies established by the management.

EARNING PER SHARE ('EPS')

EARNING PER SHARE ('EPS')	12 Months Ended
	Dec. 31, 2018
Disclosure of earnings per share [Abstract]
Earnings per share [text block]	NOTE 26. EARNING PER SHARE (‘EPS’) Basic EPS is calculated by reducing the income from continuing operations by the amount of dividends declared in the current period for each class of stock and by the contractual amount of dividends that must be paid for the current period, considering the allocation of remaining earnings to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed. EPS is determined by dividing the total earnings allocated to each security by the weighted average number of common shares outstanding. Diluted EPS assumes the issuance of common shares for all dilutive potential common shares outstanding during the reporting period. The Bank has no dilutive potential common shares as of December 31, 2018, 2017 and 2016. The following table summarizes information related to the computation of basic EPS for the years ended December 31, 2018, 2017 and 2016 (in millions of pesos, except per share data): 2018 2017 2016 Income from continuing operations before attribution of non-controlling interests 2,786,435 2,754,173 2,791,450 Less: Non-controlling interests from continuing operations 127,571 139,173 89,619 Net income from continuing operations 2,658,864 2,615,000 2,701,831 Income from operations and disposals of discontinued operations, net of taxes - - 163,497 Less: Non-controlling interests from discontinuing operations - - - Net income attributable to the controlling interest 2,658,864 2,615,000 2,865,328 Less: Preferred dividends declared 402,451 370,983 342,825 Less: Allocation of undistributed earnings to preferred stockholders 816,277 827,126 972,955 Continuing operations 816,277 827,126 896,100 Discontinued operations - - 76,855 Net income allocated to common shareholders for basic and diluted EPS 1,440,136 1,416,891 1,549,548 Weighted average number of common shares outstanding used in basic EPS calculation (In millions) 510 510 510 Basic and Diluted earnings per share to common shareholders 2,825 2,780 3,040 From continuing operations 2,825 2,780 2,870 From discontinuing operations - - 170

RELATED PARTY TRANSACTIONS

RELATED PARTY TRANSACTIONS	12 Months Ended
	Dec. 31, 2018
Disclosure of related party transactions [Abstract]
Disclosure of related party [text block]	NOTE 27. RELATED PARTY TRANSACTIONS Framework under IFRS IAS 24 Related Party Disclosures requires that an entity discloses: (a) Transactions with its related parties; and (b) Relationships between a parent and its subsidiaries irrespective of whether there have been transactions between them. Under IAS 24, an entity must disclose transactions with its related parties, outstanding balances, including commitments, recognized in the consolidated and separate financial statements of a parent or investors with joint control of, or significant influence over, an investee presented in accordance with IFRS 10. Under this standard parties are considered to be related if one party has the ability to control the other party or exercise significant influence over the other party in making financial or operational decisions, or one other party controls both. This definition applies to the Bank in the cases below: · Stockholders with ownership interest higher than 20% of the Bank’s capital: − Grupo de Inversiones Suramericana S.A. − Fondo Bancolombia ADR Program.  Members of Board of Directors and Senior Management, understood as the president and corporate Vice-presidents, as well as their close relatives (spouse and children) and the companies in which they have a participation of 10% or more.  Associates and joint ventures for which the Bank provides commercial banking services and deposits. For these purposes all companies in which the Bank has significant influence (in all cases, the Bank has between 20% and 50% share of capital), have been included. The Parent Company provides banking and financial services to its related parties in order to satisfy their liquidity needs, and except for the intercompany merger agreement described below, these transactions are conducted on similar terms to third-party transactions and are not individually material. Between the Parent Company and its related parties, during the periods ending at December 31, 2018, 2017 and 2016, there were no: − Loans that for its contractual terms do not represent a lending transaction. − Loans with interest rates different to those that are ordinarily paid or charged to third parties in similar conditions of term, risk, etc. − No guarantees, pledges or commitments have been given or received in respect of the aforementioned transactions. As of December 31, 2018 Stockholders with an interest equal or higher than 20% of the Bank’s capital Directors and senior management Associates and joint venture In millions of COP Assets Investments - 11 2,450,467 Loans and advances to customers and financial entities, net 642,319 21,331 108,833 Assets held for sale and inventories - - 19,128 (1) Other assets - - 177,537 (2) Total assets 642,319 21,342 2,755,965 Liabilities Deposits 386,467 5,028 190,046 Other liabilities - - 35,581 Total liabilities 386,467 5,028 225,627 Income Interest and other operating income 29,998 558 11,214 Dividends - - 101,091 (3) Others - - 41,985 Net income 29,998 558 154,290 Expenses Interests and other operating expenses 10,844 239 5,790 Fees - 1,145 3 Others - 54 80,312 Total expenses 10,844 1,438 86,105 (1) Investment classified as held for sale. See Note 12. Assets held for sale and Inventories. (2) This item includes portfolio purchase operation held between Bancolombia S.A. and Titularizadora Colombiana and the outstanding dividend on the preferred shares of the Compañía de Financiamiento TUYA S.A. (3) Includes dividend received for preferred shares in Compañía de Financiamiento TUYA S.A. As of December 31, 2017 Stockholders with an interest equal or higher than 20% of the Bank’s capital Directors and senior management Associates and joint venture In millions of COP Assets Investments - - 1,855,511 Loans and advances to customers and financial entities, net 423,706 17,342 124,592 Assets held for sale and inventories - - 18,413 (1) Other assets - 2 127,022 (2) Total assets 423,706 17,344 2,125,538 Liabilities Deposits 363,335 4,363 163,932 Other liabilities - 3 92 Total liabilities 363,335 4,366 164,024 Income Interest and other operating income 6,989 419 11,224 Dividends - - 48,403 Others - - 51,613 Net income 6,989 419 111,240 Expenses Interests and other operating expenses 5,603 269 20,139 Fees - 1,109 19 Others - 53 29,431 Total expenses 5,603 1,431 49,589 (1) Investment classified as held for sale. See Note 12. Assets held for sale and Inventories. (2) This ítem includes portfolio purchase operation held between Bancolombia S.A. and Titularizadora Colombiana. As of December 31, 2016 Stockholders with an interest equal or higher than 20% of the Bank’s capital Directors and management Associates and joint venture (1) In millions of COP Assets Investments - - 1,688,543 Loans and advances to customers and financial entities, net 246,245 15,709 36,262 Other assets - 389 64,078 Total assets 246,245 16,098 1,788,883 Liabilities Deposits 145,266 3,750 230,176 Other liabilities - - 31,941 Total Liabilities 145,266 3,750 262,117 Income Interest and other operating income 8,951 931 6,089 Dividends - - 49,627 Others - - 51,586 Net income 8,951 931 107,302 Expenses Interests and other operating expenses 430 767 13,912 Fees - 1,001 5 Others - - 37,370 Total expenses 430 1,768 51,287 (1) This ítem includes operations held between Bancolombia S.A. and Compañía de Financiamiento Tuya S.A. since November 1, 2016 when the Bank lost control of Tuya S.A. Furthermore, the item includes operations held between Bancolombia S.A. and Sociedad Servicios de Aceptación S.A.S. since June 2016, when that company was set up. During the years ending December 31, 2018, 2017 and 2016, the Bank paid fees to the directors COP 1,145, COP 1,109 and COP 1,001, respectively, as compensation for attending meetings of Board and Support Committees (Audit Committee, etc.). The Payments to senior management in the same periods were COP 17,245, COP 14,320 and COP 12,956, respectively, for short-term benefits, COP 427, COP 922 and COP 589, respectively, for long-term benefits COP 590, COP 460 and COP 13,994, respectively for other payments for post – employemnet benefits. The Parent company, which is also the ultimate parent company, is Bancolombia S.A. Transactions between companies included in consolidation Note 2.C and the Parent company meet the definition of related party transactions, and were eliminated from the consolidated financial statements. Financial Conglomerate Operations The following table shows the operations carried out in 2018 and 2017 on the related party chart of the Grupo Sura conglomerate: December 31, 2018 December 31, 2017 In millons of COP Assets Investments 440,294 376,171 Loans and advances to customers and financial entities, net 455,675 191,278 Other assets 2 8 Total assets 895,971 567,457 Liabilities Deposits 1,347,005 1,015,523 Other liabilities 5,818 1,882 Total liabilities 1,352,823 1,017,405 Income Interest and other operating income 602,831 488,190 Dividends 14,909 15,021 Net income 617,740 503,211 Expenses Interests and other operating expenses 54,758 32,568 Fees 2 4 Others 3,025 4,788 Total expenses 57,785 37,360 In 2016, through public deed number 1,124, a merger between the Parent Company (absorbing entity) and Leasing Bancolombia S.A. (absorbed entity) was completed, with the objective of taking advantage of synergies and complementarities between the two entities, seeking greater efficiencies and delivering a better value proposition to clients. As a result of the merger, Bancolombia became the holder of all the rights and obligations of Leasing Bancolombia and continues to offer its clients the portfolio of leasing products and services. As a result of the merger, on September 30, 2016, the Parent company recognized in its statement of financial position the assets and liabilities at their carrying value in Leasing Bancolombia’s financial statements, including the portfolio loans and financial leasing contracts amounting to COP 15,186,102, cash and cash equivalents amounting to COP 295,852 and other assets amounting to COP 1,097,058. On the other hand, the Parent company assumed liabilities in deposits from customers amounting to COP 8,944,845, debt instruments in issued amounting to COP 2,387,940 and other liabilities amounting to COP 3,117,115.

LIABILITIES FROM FINANCING ACTI

LIABILITIES FROM FINANCING ACTIVITIES	12 Months Ended
	Dec. 31, 2018
Disclosure of liabilities from financing activities [Abstract]
Disclosure of information that enables users of financial statements to evaluate changes in liabilities arising from financing activities [text block]	NOTE 28. LIABILITIES FROM FINANCING ACTIVITIES The following table presents the reconciliation of the balances of liabilities from financing activities as of December 31, 2018 and 2017: Balance as of January 1, 2018 Cash flows Non-cash changes Balance as of December 31, 2018 Foreign currency translation adjustment Interests accrued Other movements In millions of COP Liabilities from financing activities Repurchase agreements and other similar secured borrowing 3,236,128 (922,840) 2,267 - - 2,315,555 Borrowings from other financial institutions (1) 13,822,152 513,244 1,297,690 783,349 (78,471) (2) 16,337,964 Debt instruments in issue (1) 19,648,714 (1,697,698) 1,255,806 961,903 118,508 20,287,233 Preferred shares (3) 582,985 (57,701) - - 58,713 583,997 Total liabilities from financing activities 37,289,979 (2,164,995) 2,555,763 1,745,252 98,750 39,524,749 (1) The cash flows disclosed in this table related with Borrowings from other financial institutions and Debt securities in issue include the interests paid during the year amounting to COP 788,879 and COP 961,333, respectively, which are classified as cash flows from operating activities in the consolidated statement of cash flow. (2) The amount of COP (78,471) is mainly comprised by the decrease of the liabilities related to assets held for sale. (3) The cash flow amounting to COP 57,701 corresponds to the fixed minimum dividend paid to the preferred shares' holders and is included in the line "dividends paid" of the consolidated statement of cash flow, which includes the divideds paid during the year to both preferred and common shares holders. Balance as of January 1, 2017 Cash flows Non-cash changes Balance as of December 31, 2017 Foreign currency translation adjustment Interests accrued Other movements In millions of COP Liabilities from financing activities Repurchase agreements and other similar secured borrowing 1,924,010 1,313,442 (1,324) - - 3,236,128 Borrowings from other financial institutions (1) 18,905,843 (5,883,247) (177,290) 1,075,716 (98,870) (2) 13,822,152 Debt securities in issue (1) 18,704,809 (40,069) (73,652) 1,056,024 1,602 19,648,714 Preferred shares (3) 581,972 (57,701) - - 58,714 582,985 Total liabilities from financing activities 40,116,634 (4,667,575) (252,266) 2,131,740 (38,554) 37,289,979 (1) The cash flows disclosed in this table related with Borrowings from other financial institutions and Debt securities in issue include the interests paid during the year amounting to COP 1,031,078 and COP 1,084,096, respectively, which are classified as cash flows from operating activities in the consolidated statement of cash flow. (2) The amount of COP (98,870) is mainly comprised by the reclassification of liabilities relating to assets held for sale. (3) The cash flow amounting to COP 57,701 corresponds to the fixed minimum dividend paid to the preferred shares' holders and is included in the line "dividends paid" of the consolidated statement of cash flow, which includes the divideds paid during the year to both preferred and common shares holders.

FAIR VALUE OF ASSETS AND LIABIL

FAIR VALUE OF ASSETS AND LIABILITIES	12 Months Ended
	Dec. 31, 2018
Disclosure of fair value of assets and liabilities [Abstract]
Disclosure of fair value measurement [text block]	NOTE 29. FAIR VALUE OF ASSETS AND LIABILITIES The following table presents the carrying amount and the fair value of the assets and liabilities as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 Carrying amount Fair Value Carrying amount Fair Value In millions of COP Assets Debt instruments at fair value through profit or loss 8,909,861 8,909,861 10,701,855 10,701,855 Debt instruments at fair value through OCI (1) 3,329,738 3,329,738 - - Debt instruments at amortized cost 3,481,928 3,461,616 4,157,568 4,131,688 Derivative financial instruments 1,843,708 1,843,708 1,134,372 1,134,372 Equity securities at fair value 1,639,948 1,639,948 1,517,830 1,517,830 Loans and advances to customers and financial institutions, net 163,583,285 167,551,429 152,244,991 149,162,071 Investment property 1,732,873 1,732,873 1,657,409 1,657,409 Investments in associates (2) 1,119,973 1,119,973 757,886 757,886 Equity securities - Assets held for sale - - 2,486 2,486 Total 185,641,314 189,589,146 172,174,397 169,065,597 Liabilities Deposits by customers 142,128,471 142,860,996 131,959,215 132,779,730 Interbank deposits 1,374,222 1,374,222 1,084,591 1,084,591 Repurchase agreements and other similar secured borrowing 2,315,555 2,315,555 3,236,128 3,236,128 Derivative financial instruments 1,295,070 1,295,070 945,853 945,853 Borrowings from other financial institutions 16,337,964 16,337,964 13,822,152 13,822,152 Preferred shares 583,997 602,597 582,985 662,999 Debt instruments in issue 20,287,233 20,759,456 19,648,714 20,756,154 Total 184,322,512 185,545,860 171,279,638 173,287,607 (1) For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards. (2) It corresponds investments in associates P.A Viva Malls. See Note 7 investments in associates and joint ventures  Fair value hierarchy IFRS 13 establishes a fair value hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable, that reflects the significance of inputs adopted in the measurement process. In accordance with IFRS the financial instruments are classified as follows: Level 1: Observable inputs that reflect quoted prices (unadjusted) in active markets for identical assets or liabilities. An active market is a market in which transactions for the asset or liability being measured take place with sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2: Inputs other than quoted prices included in Level 1 that are observable for the asset or liability either directly or indirectly. Level 2 generally includes: (i) quoted prices for similar assets or liabilities in active markets; (ii) quoted prices for identical or similar assets or liabilities in markets that are not active, that is, markets in which there are few transactions for the asset or liability. Level 3 : Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Level 3 assets and liabilities include financial instruments whose value is determined using pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation. This category generally includes certain retained residual interests in securitizations, asset-backed securities (ABS) and highly structured or long-term derivative contracts where independent pricing information was not able to be obtained for a significant portion of the underlying assets. • Valuation process for fair value measurements The valuation to fair value prices is performed using prices, methodologies and inputs provided by the official pricing services provider (Precia) to the Bank. All methodologies and procedures developed by the pricing services provider are supervised by the Financial Superintendence of Colombia, which has not objected to them. On a daily basis, the back-office Service Valuation Officer (SVO) verifies the valuation of investments, and the Credit and Financial Risk Manager area reports the results of the portfolio’s valuation. Fair value measurement Assets a. Debt instruments The Bank assigns prices to those debt investments, using the prices provided by the official pricing services provider (Precia) and assigns the appropriate level according to the procedure described above. For securities not traded or over-the-counter such as certain bonds issued by other financial institutions, the Bank generally determines fair value utilizing internal valuation and standard techniques. These techniques include determination of expected future cash flows which are discounted using curves of the applicable currencies and the Colombian consumer price index (interest rate in this case), modified by the credit risk and liquidity risk. The interest rate is generally computed using observable market data and reference yield curves derived from quoted interest in appropriate time bandings, which match the timings of the cash flows and maturities of the instruments. b. Equity securities The Bank performs the market price valuation of their investments in variable income using the prices provided by the official pricing services provider (Precia) and classifies those investments according to the procedure described above (Hierarchy of fair value section). Likewise, the fair value of unlisted equity securities is based on an assessment of each individual investment using methodologies that include publicly-traded comparables derived by multiplying a key performance metric (e.g., earnings before interest, taxes, depreciation and amortization) of the portfolio company by the relevant valuation multiple observed for comparable companies, acquisition comparables, and if necessary considered, are subject to appropriate discounts for lack of liquidity or marketability. Interests in investment funds, trusts and collective portfolios are valued using the investment unit value determined by the fund management company. For investment funds where the underlying assets are investment properties, the investment unit value depends on the investment properties value, determined as described below in “i. Investment property”. c. Derivative financial instruments The Bank holds positions in standardized derivatives, such as futures over local stocks, and over the representative exchange rate (TRM). These instruments are valuated according to the information provided by Precia, which perfectly matches the information provided by the Central Counterparty Clearing House – CCP. Additionally, the Bank holds positions in OTC derivatives, which in the absence of prices, are valued using the inputs and methodologies provided by the pricing services provider. The key inputs depend upon the type of derivative and the nature of the underlying instrument and include interest rate yield curves, foreign exchange rates, the spot price of the underlying volatility, credit curves and correlation of such inputs. d. Credit valuation adjustment The Bank measures the effects of the credit risk of its counterparties and its own creditworthiness in determining fair value of the swap, option and forward derivatives. Counterparty credit-risk adjustments are applied to derivatives when the Bank’s position is a derivative asset and the Bank’s credit risk is incorporated when the position is a derivative liability. The Bank attempts to mitigate credit risk to third parties which are international banks by entering into master netting agreements. When assessing the impact of credit exposure, only the net counterparty exposure is considered at risk, due to the offsetting of certain same-counterparty positions and the application of cash and other collateral. The Bank generally calculates the asset’s credit risk adjustment for derivatives transacted with international financial institutions by incorporating indicative credit related pricing that is generally observable in the market (“CDS”). The credit-risk adjustment for derivatives transacted with non-public counterparties is calculated by incorporating unobservable credit data derived from internal credit qualifications to the financial institutions and corporate companies located in Colombia. The Bank also considers its own creditworthiness when determining the fair value of an instrument, including OTC derivative instruments if the Bank believes market participants would take that into account when transacting the respective instrument. The approach to measuring the impact of the Bank’s credit risk on an instrument transacted with international financial institutions is done using the asset swap curve calculated for subordinated bonds issued by the Bank in foreign currency. For derivatives transacted with local financial institutions, the Bank calculates the credit risk adjustment by incorporating credit risk data provided by rating agencies and released in the Colombian financial market. e. Impaired loans measured at fair value The Bank measured certain impaired loans based on the fair value of the associated collateral less costs to sell. The fair values were determined as follows using external and internal valuation techniques or third party experts, depending on the type of underlying asset. For vehicles under leasing arrangements, the Bank uses an internal valuation model based on price curves for each type of vehicle. Such curves show the expected price of the vehicle at different points in time based on the initial price and projection of economic variables such as inflation, devaluation and customs. The prices modelled in the curves are compared every six months with market information for the same or similar vehicles and in the case of significant deviation; the curve is adjusted to reflect the market conditions. Other vehicles are measured using matrix pricing from a third party. This matrix is used by most of the market participants and is updated monthly. The matrix is developed from values provided by several price providers for identical or similar vehicles and considers brand, characteristics of the vehicles, and manufacturing date among other variables to determine the prices. For real estate assets, a third-party qualified appraiser is used. The methodologies vary depending on the date of the last appraisal available for the property (the appraisal is estimated based on either of three approaches: cost, sales comparison and income approach, and is required every three years). When the property has been valued in the last 12 months and the market conditions have not shown significant changes, the most recent valuation is considered the fair value of the property. For all other cases (for example, appraisals older than 12 months) the value of the property is updated by adjusting the value in the last appraisal for weighted factors such as location, type and characteristics of the property, size, structural conditions and the expected sales prices, among others. The factors are determined based on current market information gathered from several external real estate specialist. f. Assets held for sale measured at fair value less cost of sale The Bank measures certain impaired foreclosed assets and premises and equipment held for sale based on fair value less costs to sell. The fair values were determined using external and internal valuation techniques, depending on the type of underlying asset. Those assets are comprised mainly of real estate properties for which the appraisal is conducted by experts considering factors such as the location, type and characteristics of the property, size, physical conditions and expected selling costs, among others. Likewise, in some cases the fair value is estimated considering comparable prices or promises of sale and offering prices from auctions process. g. Mortgage-backed securities (“TIPS”) and Asset-Backed securities The Bank invests in asset-backed securities for which underlying assets are mortgages and earnings under contracts issued by financial institutions and corporations, respectively. The Bank does not have a significant exposure to sub-prime securities. The asset-backed securities are denominated in local market TIPS and are classified as fair value through profit or loss. These asset-backed securities have different maturities and are generally classified by credit ratings. Fair values were estimated using discounted cash flows models where the main key economic assumptions used are estimates of prepayment rates and resultant weighted average lives of the securitized mortgage portfolio, probability of default and interest rate curves. These items are classified as level 2 and level 3. h. Investments in associates measured at fair value The Bank recognizes its investment in PA Viva Malls as an associated at fair value. The estimated amount is provided by fund manager as the variation of the units according to the units owned by the Fondo Colombia Inmobiliario. The associate’s assets are comprised of investment properties which are measured using the following techniques: comparable prices, discounted cash flows, replacement cost and direct capitalization. For further information about techniques methodologies and inputs used by the external party see “Quantitative Information about Level 3 Fair Value Measurements”. i. Investment property The Bank’s investment property are valued by external experts, who use valuation techniques based on comparable prices, direct capitalization, discounted cash flows and replacement costs. Assets and liabilities measured at fair value on a recurring basis The following table presents for each of the fair-value hierarchy levels the Bank’s assets and liabilities that are measured at fair value on a recurring basis at December 31, 2018 and 2017: Financial Assets Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Investment securities Debt instruments at fair value through profit or loss Securities issued by the Colombian Government 7,170,085 72,083 - 7,242,168 6,013,860 989,287 - 7,003,147 Securities issued or secured by government entities 24,588 12,851 6,407 43,846 9,186 26,852 - 36,038 Securities issued by other financial institutions 115,234 338,992 206,950 661,176 177,531 578,196 297,049 1,052,776 Securities issued by foreign governments 397,115 420,524 - 817,639 1,196,963 1,275,031 - 2,471,994 Corporate bonds 61,556 83,317 159 145,032 33,800 100,982 3,118 137,900 Total debt instruments at fair value through profit or loss 7,768,578 927,767 213,516 8,909,861 7,431,340 2,970,348 300,167 10,701,855 Debt instruments at fair value through OCI (1) Securities issued by other financial institutions - 186,250 - 186,250 - - - - Securities issued by foreign governments 1,630,379 1,513,109 - 3,143,488 - - - - Total debt instruments at fair value through OCI 1,630,379 1,699,359 - 3,329,738 - - - - Total debt instruments 9,398,957 2,627,126 213,516 12,239,599 7,431,340 2,970,348 300,167 10,701,855 Equity securities Equity securities 100,233 115 1,539,600 1,639,948 145,250 28,976 1,343,604 1,517,830 Total equity securities 100,233 115 1,539,600 1,639,948 145,250 28,976 1,343,604 1,517,830 Derivative financial instruments Forwards Foreign exchange contracts - 96,426 197,919 294,345 - 78,189 94,121 172,310 Equity contracts - 968 13 981 - 357 15 372 Total forwards - 97,394 197,932 295,326 - 78,546 94,136 172,682 Swaps Foreign exchange contracts - 1,053,684 145,552 1,199,236 - 482,330 190,228 672,558 Interest rate contracts 2,935 198,697 51,296 252,928 8,171 220,027 45,939 274,137 Total swaps 2,935 1,252,381 196,848 1,452,164 8,171 702,357 236,167 946,695 Options Foreign exchange contracts - 6,707 89,511 96,218 - 746 14,249 14,995 Total options - 6,707 89,511 96,218 - 746 14,249 14,995 Total derivative financial instruments 2,935 1,356,482 484,291 1,843,708 8,171 781,649 344,552 1,134,372 Investment properties Buildings - - 1,483,594 1,483,594 - - 1,425,585 1,425,585 Financial Assets Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Lands - - 249,279 249,279 - - 231,824 231,824 Total investment properties - - 1,732,873 1,732,873 - - 1,657,409 1,657,409 Investment in associates PA Viva Malls - - 1,119,973 1,119,973 - - 757,886 757,886 Total investment in associates and joint ventures - - 1,119,973 1,119,973 - - 757,886 757,886 Equity securities - Assets held for sale Assets held for sale - - - - - - 2,486 2,486 Total Equity securities - Assets held for sale - - - - - - 2,486 2,486 Total 9,502,125 3,983,723 5,090,253 18,576,101 7,584,761 3,780,973 4,406,104 15,771,838 (1) For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies. Financial liabilities Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Derivative financial instruments Forwards Foreign exchange contracts - (242,844) (56,171) (299,015) - (122,424) (20,552) (142,976) Equity contracts - (7,325) (260) (7,585) - (3,955) (515) (4,470) Total forwards - (250,169) (56,431) (306,600) - (126,379) (21,067) (147,446) Swaps Foreign exchange contracts - (654,093) (46,810) (700,903) - (459,789) (46,034) (505,823) Interest rate contracts (3,887) (248,436) (5,655) (257,978) (9,347) (252,660) (13,634) (275,641) Total swaps (3,887) (902,529) (52,465) (958,881) (9,347) (712,449) (59,668) (781,464) Options Foreign exchange contracts - (29,589) - (29,589) - (16,943) - (16,943) Total options - (29,589) - (29,589) - (16,943) - (16,943) Total derivative financial instruments (3,887) (1,182,287) (108,896) (1,295,070) (9,347) (855,771) (80,735) (945,853) Total (3,887) (1,182,287) (108,896) (1,295,070) (9,347) (855,771) (80,735) (945,853) Fair value of assets and liabilities that are not measured at fair value in the Statement of Financial Position The following table presents for each of the fair-value hierarchy levels the Bank’s assets and liabilities that are not measured at fair value in the statement of financial position but for which the fair value is disclosed at December 31, 2018 and 2017: Assets Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Debt instruments Securities issued by the Colombian Government 36,847 13,424 - 50,271 - 12,967 - 12,967 Securities issued or secured by government entities 17,744 386,396 1,449,333 1,853,473 17,204 528,395 1,350,175 1,895,774 Securities issued by other financial institutions 107,959 23,375 12,326 143,660 194,606 21,871 12,007 228,484 Securities issued by foreign governments 130,913 141,652 - 272,565 748,060 302,795 - 1,050,855 Corporate bonds 259,904 53,395 828,348 1,141,647 231,601 49,694 662,313 943,608 Total – Debt instruments 553,367 618,242 2,290,007 3,461,616 1,191,471 915,722 2,024,495 4,131,688 Loans and advances to customers and financial institutions, net - - 167,551,429 167,551,429 - - 149,162,071 149,162,071 Total 553,367 618,242 169,841,436 171,013,045 1,191,471 915,722 151,186,566 153,293,759 Liabilities Type of instruments December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Deposits by customers - (30,490,414) (112,370,582) (142,860,996) - (30,440,868) (102,338,862) (132,779,730) Interbank deposits - - (1,374,222) (1,374,222) - - (1,084,591) (1,084,591) Repurchase agreements and other similar secured borrowing - - (2,315,555) (2,315,555) - - (3,236,128) (3,236,128) Borrowings from other financial institutions - - (16,337,964) (16,337,964) - - (13,822,152) (13,822,152) Preferred shares - - (602,597) (602,597) - - (662,999) (662,999) Debt instruments in issue (9,503,793) (8,486,088) (2,769,575) (20,759,456) (8,999,118) (9,534,766) (2,222,270) (20,756,154) Total (9,503,793) (38,976,502) (135,770,495) (184,250,790) (8,999,118) (39,975,634) (123,367,002) (172,341,754) IFRS requires entities to disclose the fair value of financial instruments, both assets and liabilities recognized and not recognized in the statement of financial position, for which it is practicable to estimate fair value. Certain categories of assets and liabilities, however, are not eligible for fair value accounting. The financial instruments below are not recorded at fair value on a recurring and nonrecurring basis: Short-term financial instruments Short-term financial instruments are valued at their carrying amounts included in the consolidated statement of financial position, which are reasonable estimates of fair value due to the relatively short period to maturity of the instruments. This approach was used for cash and cash equivalents, accrued interest receivable, customers’ acceptances, accounts receivable, accounts payable, accrued interest payable and bank acceptances outstanding. Deposits from customers The fair value of time deposits was estimated based on the discounted value of cash flows using the appropriate discount rate for the applicable maturity. Fair value of deposits with no contractual maturities represents the amount payable on demand as of the statement of financial position date. Interbank deposits and repurchase agreements and other similar secured borrowings Short-term interbank borrowings and repurchase agreements have been valued at their carrying amounts because of their relatively short-term nature. Long-term and domestic development bank borrowings have also been valued at their carrying amount because they bear interest at variable rates. Borrowings from other financial institutions The fair value of borrowings from other financial institutions were determined using discounted cash flow models. The cash flows projection of capital and interest was made according to the contractual terms, considering capital amortization and interest bearing. Subsequently, the cash flows was discounted using reference curves formed by the weighted average of the Bank’s deposit rates. Debt instruments in issue The fair value of debt instruments in issue, comprised of bonds issued by Bancolombia S.A. and its subsidiaries, was estimated substantially based on quoted market prices. The fair value of certain bonds which do not have a public trading market, were determined based on the discounted value of cash flows using the rates currently offered for bonds of similar remaining maturities and the Bank’s creditworthiness. Preferred shares In the valuation of the liability component of preferred shares related to the minimum dividend of 1% of the subscription price, the Bank uses the Gordon model to price the obligation, taking into account its own credit risk, which is measured using the market spread based on observable inputs such as quoted prices of sovereign debt. The Gordon Model is commonly used to determine the intrinsic value of a stock based on a future series of dividends that are estimated by the Bank and growth at a constant rate considering the Bank’s own perspectives of the payout ratio. Loans and advances to customers and financial institutions Estimating the fair value of loans and advances to customers is considered an area of considerable uncertainty as there is no observable market. The loan portfolio is stratified into tranches and loans segments suchs as commercial, small business loans, mortgage and consumer. The fair value of loans and advances to customers and financial institutions is determined using a discounted cash flow methodology, considering each credit’s principal and interest projected cash flows to the prepayment date. Subsequently, the projected cash flows are discounted using reference curves according to the type of loan and its maturity date. Items Measured at fair value on a non-recurring basis The Bank measures certain foreclosed assets held for sale based on fair value less costs to sell. The fair values were determined using external and internal valuation techniques or third party experts, depending on the type of underlying asset. The following breakdown sets forth the fair value hierarchy of those assets classified by type: December 31, 2018 December 31, 2017 Fair-value hierarchy Total fair Value Fair-value hierarchy Total fair Value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Machinery and equipment - - 5,556 5,556 - - 11,500 11,500 Real estate for residential purposes - - 92,052 92,052 - - 23,854 23,854 Real estate different from residential properties - - 24,076 24,076 - - 1,402 1,402 Collateralized loans (1) - - - - - - 5,417,875 5,417,875 Total - - 121,684 121,684 - - 5,454,631 5,454,631 (1) From January 1, 2018 onwards, the disclosure of collateralized loans is no longer required, due to the adoption of IFRS 9 Investment in Associates – TUYA S.A The valuation of the Bank’s participation in TUYA SA was made through an exercise of benchmark multiples, using the price / book value multiple as reference. A list of comparable companies that have a similar economic activity to the company valued was taken. Taking into account that several of the comparable companies are in a different geography, adjustments were made to the multiple to reflect this situation. The most sensitive assumptions used by the Bank in determining the fair value of Tuya were the valuation trading multiple and the discount rate used. The valuation trading multiple was 3.63x and 1.29x for 2018 and 2017 respectively, and it was computed using a linear regression model, Tuya’s expected return rate used by the expert was 11.83% and 12.13% for 2018 and 2017 respectively December 31, 2018 December 31, 2017 Fair-value hierarchy Total fair Value Fair-value hierarchy Total fair Value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Investment in Associates - TUYA - - 561,285 561,285 - - 225,548 225,548 Total - - 561,285 561,285 - - 225,548 225,548 Changes in Level 3 Fair-Value Category The table below presents reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during 2018 and 2017: As of December 31, 2018 Balance, January 1, 2018 Included in earnings OCI Purchases / reclassifications Settlement Prepaids Transfers in to Level 3 Transfers out of Level 3 Balance, December 31, 2018 Debt instruments at fair value though profit or loss Securities issued or secured by Government entities - 53 - 1,383 - - 4,971 - 6,407 Securities issued or secured by other financial entities 297,049 (54,595) - 29,149 (64,014) - 5,394 (6,033) 206,950 Corporate bonds 3,118 (3,983) - 4,159 (2,518) - - (617) 159 Total 300,167 (58,525) - 34,691 (66,532) - 10,365 (6,650) 213,516 Derivative financial instruments Foreign exchange contracts 232,012 25,016 - 230,869 (107,890) - (40,898) (9,108) 330,001 Interest rate contracts 32,305 (13,320) - 17,561 (9,152) - 19,106 (859) 45,641 Equity contracts (500) - - (247) 500 - - - (247) Total 263,817 11,696 - 248,183 (116,542) - (21,792) (9,967) 375,395 Equity securities Equity securities 1,343,604 131,446 38,648 41,459 (15,557) - - - 1,539,600 Total 1,343,604 131,446 38,648 41,459 (15,557) - - - 1,539,600 Investment in associates PA Viva Malls 757,886 87,136 - 274,951 - - - - 1,119,973 Total 757,886 87,136 - 274,951 - - - - 1,119,973 Equity securities - Assets held for sale Assets held for sale 2,486 - - - (2,486) - - - - Total 2,486 - - - (2,486) - - - - As of December 31, 2017 Balance, January 1, 2017 Included in earnings OCI Purchases / reclassifications Settlement Prepaids Transfers in to Level 3 Transfers out of Level 3 Balance, December 31, 2017 In millions of COP Debt instruments at fair value Securities issued or secured by other financial entities 405,099 (70,416) - 52,316 (58,999) - - (30,951) 297,049 Corporate bonds 14,929 (4,211) - 5,999 (10,869) (72) - (2,658) 3,118 Total 420,028 (74,627) - 58,315 (69,868) (72) - (33,609) 300,167 Derivative financial instruments Foreign exchange contracts 378,385 353 - 231,260 (378,053) - 103 (36) 232,012 Interest rate contracts 17,596 - - 34,067 (17,596) - (1,762) - 32,305 Equity contracts 337 - - (500) (337) - - - (500) Total 396,318 353 - 264,827 (395,986) - (1,659) (36) 263,817 Equity securities Equity securities 1,178,678 107,848 26,736 116,743 (41,948) - 6,950 (51,403) 1,343,604 Total 1,178,678 107,848 26,736 116,743 (41,948) - 6,950 (51,403) 1,343,604 Investment in associates PA Viva Malls 388,595 108,868 - 262,918 (2,495) - - - 757,886 Total 388,595 108,868 - 262,918 (2,495) - - - 757,886 Equity securities - Assets held for sale Assets held for sale - - - 1,345 - - 1,141 - 2,486 Total - - - 1,345 - - 1,141 - 2,486 Level 3 fair value rollforward The following were the significant Level 3 transfers for the period December 31, 2017 to 2018: Transfer of COP (21,792) in 2018 from Level 2 to Level 3 of the derivative foreign exchange contracts and Interest rate contracts, was presented due to the transfer of the credit risk from the Bank to the credit risk of the counterparty Transfer of COP 30,951 in 2017 from Level 3 to Level 2 Securities issued or secured by other financial entities. A change was observed in the marking days for the margin methodology. In 2016, these securities have an updated margin for a period exceeding 365 days, and for 2017, these were less than 365 days, therefore the actual level is 2. Transfers of COP 51,403 in 2017 from level 3 to level 1 equity securities, are mainly explained by the change in the fair value level of Deceval, since the valuation underlying asset as of December 31, 2017 equals the quoted price of Bolsa de Valores de Colombia at the end of the year, due to the merger between both companies in 2017. As of December 31, 2018 and 2017, unrealized gains and losses on debt instruments were COP 58,736 and COP 73,505; Equity Securities COP 130,453 and COP 116,051 respectively Transfers between Level 1 and Level 2 of the Fair Value Hierarchy During the years ended December 31, 2018 and 2017, the Bank transferred securities amounting to COP 826,618 securities issued by foreign governments, from Level 1 to Level 2 primarily, because such securities decreased their liquidity. During the years ended December 31, 2017 and 2016, the Bank transferred securities amounting to COP 2,700 Securities issued or secured by Colombian Government, from Level 1 to Level 2 primarily, because such securities decreased their liquidity and were traded less frequently to comprise an active market. All transfers are assumed to occur at the end of the reporting period. Quantitative Information about Level 3 Fair Value Measurements The fair value of financial instruments are, in certain circumstances, measured using valuation techniques that incorporate assumptions that are not evidenced by prices from observable market transactions in the same instrument and are not based on observable market data. Changing one or more of the inputs to the valuation models to reasonably possible alternative assumptions would change the fair values and therefore a valuation adjustment would be recognized in profit or loss. Favorable and unfavorable changes are determined on the basis of changes in the value of the instrument as a result of varying the levels of the unobservable input as described in the table below. The following table sets forth information about significant unobservable inputs related to the Bank’s material categories of Level 3 financial assets and liabilities and the sensitivity of these fair values to reasonably possible alternative assumptions. As of December 31, 2018 Financial instrument Fair Value Valuation technique Significant unobservable input Range of inputs Weighted average Sensitivity 100 basis point increase Sensitivity 100 basis point decrease Amounts in millions of COP Debt instruments Securities issued by other financial institutions Yield 0.16% to 0.90% 0.69% 160,056 168,000 TIPS 164,401 Discounted cash Liquidity risk 0% to 9.38% 3.58% 160,162 167,881 flow Prepayment Speed n/a n/a 164,102 163,602 Other bonds 34,961 Discounted cash flow Yield 0.14% to 0.89% 0.60% 33,700 36,299 Liquidity risk 2.80% to 3.48% 3.04% 33,142 35,678 Securitizations 5,394 Discounted cash flow Yield 2.04 2.04% 5,37

DISCONTINUED OPERATIONS

DISCONTINUED OPERATIONS	12 Months Ended
	Dec. 31, 2018
Disclosure of discontinued operations [Abstract]
Disclosure of discontinued operations [text block]	NOTE 30. DISCONTINUED OPERATIONS Compañía de financiamiento Tuya S.A is a private entity oriented to offer lines of credit directed to individuals, corporate credit cards, vehicle loan and payroll loans among others, as a result of which Tuya has achieved a significant market share position in the consumer loan market in Colombia. On October 31, 2016 Bancolombia S.A, announced that, after obtaining all the required regulatory approvals, the sale agreement announced in a press release on July 1, 2015, pursuant to which Bancolombia S.A (“Bancolombia”), the Fondo de Empleados of Grupo Bancolombia - FEBANC and Fundación Bancolombia, (together, the “Sellers”), transferred to Almacenes Exito S.A (“Almacenes Exito”) and Almacenes Exito Inversiones S.A.S (together, the “Buyers”) 50% of the shares of Compañía de Financiamiento Tuya S.A (“Tuya”), entered into effect. The total purchase price of the transaction was COP 79,017. As a result of this transaction: 1. Tuya is jointly controlled by the strategic partners since October 30, 2016. 2. Tuya’s shares formerly owned by the Bank will now be owned by Bancolombia S.A. and its subsidiaries Banca de Inversión Bancolombia S.A. Corporación Financiera and BIBA Inmobiliaria SAS. 3. Tuya’s assets and liabilities were derecognized at their carrying amounts at October 31, 2016, which is considered the date when the Bank’s control was lost. Likewise the Bank recognized the fair value of the non-controlling interest in Tuya amounting to COP 343,108 as a joint venture. The fair value of the consideration received amounted to COP 79,017 and as a result of this transaction the Bank recognized an income by COP 263,770 (associated with the remeasurement of the fair value) in the statement of income in the line “Income from discontinued operations”, and the related occasional earning tax amounted to COP 659 and the deferred income tax amounted to COP 99,614. Analysis of the results of discontinued operations: Results of operations as of October 31, 2016, recognized in the Consolidated Statement of Income as Net income from discontinued operations, are the following: Ten months ended October 31, 2016 In millons of COP Interest income on loans 408,233 Overnight and market funds 320 Interest and valuation on investment 1,246 Total interest and valuation 409,799 Interest expense (106,110) Net margin on financial instruments 303,689 Credit impairment charges on loans, net (323,290) Net interest and valuation income after provision for loans and financial leases (19,601) Fees and other service income, net 244,193 Other operating income 1,365 Total income, net 225,957 Total operating expenses (221,310) Profit before tax 4,647 Income tax (2,961) Net income from discontinued operations 1,686

RISK MANAGEMENT

RISK MANAGEMENT	12 Months Ended
	Dec. 31, 2018
Disclosure Of Risk Management [Abstract]
Disclosure Of Risk Management [Text Block]	NOTE 31. RISK MANAGEMENT The Bank’s comprehensive risk management is developed in compliance with current regulations and internal standards as defined by the Board of Directors, in relation to market, credit/ counterparty, liquidity and operational risk. This management is strengthened with the three lines of defense model, with a cohesive and coordinated approach, in which its independence is guaranteed. Within the Corporate Governance Framework, the roles of the responsible areas in each line are defined, according to the level of responsibility in Grupo Bancolombia, in order to guarantee effective and efficient coordination among them for risk management (in its different stages) and internal control. First line of defense: Second line of defense: Specifically, the Board of Directors reviews and approves the resources, structure and processes of the Bank associated with risk management; in addition, it evaluates, through periodic reports from the administration, the levels of exposure to the different risks, their impact and the mitigation strategies, in accordance with the functions established in the current regulation and the Corporate Governance Code regarding the risk management. For the development of its supervisory functions has the support of the Risk Committee in charge of the approval, monitoring and control of policies, methodologies, tools, guidelines and strategies for the identification, measurement, control and mitigation of risks. According to the corporate guidelines, the Risk Committee has the participation of members from the Board of Directors. The main function of the Corporate Risk Vicepresidency is to design and propose risk management strategies to the Board of Directors and Senior Management, lead its execution and define the risk appetite, in such a way as to ensure alignment with the corporate strategy of the Group. In addition, it defines the risk guidelines in policies, methodologies and tools for the Group. The Risk Corporate Vicepresidency professionals manage the different risks inherent to the activities undertaken in the fulfillment of their responsibilities. Third line of defense: Review the first two lines of defense, through a risk-based approach, guaranteeing governance effectiveness, risk management and internal control. It provides the Governance structures and Senior management with an adequate, independent and objective assurance of compliance within the organization. Specifically, the Internal Audit periodically evaluates the execution of the processes and the application of the methodologies for measurement and control of risks that support the operations carried out by the entity, in accordance with current regulations and internal regulations defined by the Board of Directors and Senior Management. 31.1 Credit risk Credit risk is the risk of an economic loss to the Bank due to a non-fulfillment of financial obligations by a customer or counterparty and arises principally from the decline on borrower´s creditworthiness or changes in the business climate. Credit risk is the single largest risk for the Bank's business; the Bank manages its exposure to credit risk. The information below contains the maximum exposure to credit risk: December 31, 2018 Maximum exposure to credit risk - Financial instruments subject to impairment In millions of COP Stage 1 Stage 2 Stage 3 Total Loans and Advances 153,894,099 7,712,055 12,212,962 173,819,116 Commercial 83,632,770 3,214,860 7,753,018 94,600,648 Consumer 28,666,461 1,758,162 1,568,758 31,993,381 Mortgage 20,280,416 1,513,063 1,077,206 22,870,685 Small Business Loans 958,491 80,805 116,902 1,156,198 Financial Leases 20,355,961 1,145,165 1,697,078 23,198,204 Off-Balance Sheet Exposures 38,831,993 349,228 354,525 39,535,746 Financial Guarantees 5,641,482 18,340 1,839 5,661,661 Loan Commitments 33,190,511 330,888 352,686 33,874,085 Loss Allowance (1,872,529) (1,246,444) (7,244,517) (10,363,490) Total 190,853,563 6,814,839 5,322,970 202,991,372 Maximum Exposure to Credit Risk - Other Financial Instruments Maximum Exposure Collateral * Net Exposure 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Debt instruments 15,745,530 14,859,423 (2,352,276) (2,741,345) 13,393,254 12,118,078 Derivatives ** 894,001 457,940 (97) (125,902) 893,905 332,038 Equity 1,639,949 1,520,313 - - 1,639,949 1,520,313 Total 18,279,480 16,837,676 (2,352,373) (2,867,247) 15,927,108 13,970,429 See Notes on this table: * Collateral Held (-) and Collateral Pledged (+) ** * Debt instruments Book value 100% * Equity Instruments: - Shares:100% - Investment funds: Book value 100% December 31, 2017 Maximum exposure Collateral Net exposure In millions of COP Loans and Advances 160,468,094 (71,122,738) 89,345,356 Commercial 88,997,241 (42,593,800) 46,403,441 Consumer 27,646,114 (5,915,201) 21,730,913 Mortgage 20,512,208 (18,991,957) 1,520,251 Small Business Loans 1,063,580 (652,227) 411,353 Financial Leases 22,248,951 (2,969,553) 19,279,398 Off-Balance Sheet Exposures 22,360,075 - 22,360,075 Financial Guarantees 6,701,643 - 6,701,643 Loan Commitments 15,658,432 - 15,658,432 Other Financial Instruments (1) 16,837,677 (2,867,247) 13,970,430 Debt Securities 14,859,423 (2,741,345) 12,118,078 Derivatives 457,940 (125,902) 332,038 Equity Securities (2) 1,520,314 - 1,520,314 Total 199,665,846 (73,989,985) 125,675,861 (1) Collateral Held (-) and Collateral Pledged (+). (2) Includes investments classified as “assets held for sale”. See Note 12 Assets held for sale and inventories, net. Maximum exposure to credit risk of the loans and advances refers to the carrying amount at the end of the period. It does not take into account any collateral received or any other credit risk mitigates. Maximum exposure to credit risk of financial guarantees corresponds to the total amount guaranteed at the end of the period. This amount represents the worst case scenario and does not reflect the expected results. Maximum exposure to derivatives refers to the fair value at the end of the period, without considering any guarantee received or any other credit risk mitigates. Maximum exposure to credit risk of debt instruments and equity securities refers to the carrying amount at the end of the period without considering any guarantee received. a. Credit Risk Management - Loans and Advances Risk management during the credit life cycle is developed through the fulfillment of the policies, procedures and methodologies stipulated in the Credit Risk Administration System, in accordance with the strategy approved by the Board of Directors for monitoring and controlling credit risk. The Credit Risk Administration System also contains the general criteria to evaluate, classify, measure and mitigate credit risk. In addition, the credit risk department has developed methodologies and manuals that specify the policies and procedures for different products and segments managed by the Bank. To maintain credit quality and manage the risk arising from its lending activities, the Bank has established general loan policies, including the following:  Credit exposure limits: It contains guidelines with regards to the establishment of credit exposure limits. It is set in fulfillment of legal requirements and according to the Bank’s internal guidelines.  Origination policies: These policies aim to acquire ample and sufficient knowledge of the characteristics of potential borrowers and to select them properly. The riskiness of the borrowers is determined using credit rating models. These models use information such as the credit history of the borrower, the type of business the borrower engages in, the borrower’s ability to repay the loan, and information received from the credit risk bureaus. The credit risk rating system is also used in determining the allowance for loans and advances and lease losses. Loan applications, depending on their amount and risk level, are presented for approval at the level of management authority required.  Collaterals policies : For the purpose of mitigating risk associated with non-fulfillment of obligations agreed upon by the borrower, the Bank has established policies for the valuation of collateral received as well as for the determination of the maximum loan amount that can be granted against the value of the collateral.  Allowance policies: the objective of this policy is to fulfil legal requirements and the Bank’s business policies. In addition, this policy is meant to provide the guidelines to perform client’s status analysis and take the necessary actions in order to mitigate credit risk the Bank is exposed to. For further information please see Note 2.  Monitoring policies: Contains various monitoring procedures, portfolio reports and policies for the purpose of overseeing, in an adequate and timely manner, the evolution of credit risk. These procedures include a continuous process of classification and reassessment of credit operations and they maintain consistency with the policies implemented for granting loans.  Portfolio recovery policies: Through the definition of these policies, the Bank aims to establish those mechanisms that allow it to anticipate the action to be taken in the event of possible delays and minimize the impact resulting from non-fulfillment of payment or delays by the borrower. Additionally, the aspects established in this policy delimit what the Bank has defined as collection management and that make it possible to obtain information to improve the origination policies and the allowances for loans and advances and lease losses models. Management of credit risk is carried out in all of the credit life cycle. These processes are defined in the following way:  Origination: Knowing the borrower, payment capacity analysis, payment behavior and credit approval and structure.  Monitoring: Knowing the borrower’s situation during the life of the credit.  Recovery: Collection management during the different stages of the same credit. In order to sustain an adequate credit origination processes, the Bank develops scoring and rating models based on statistical information or criteria from experts, which differentiate the risk levels of potential borrowers in order to support the decision-making process. The Risk Corporate Vice Presidency is in charge of defining and documenting the specific characteristics of the models being utilized, as well as the parameters, variables to use in each case and the cut-off points that are applied per situation in the process of issuing credit. On an annual basis at the minimum, the Risk Corporate Vice Presidency must perform backtesting 1 In addition to the evaluation and qualification of the portfolio, the monthly allowance for loans and advances and lease losses serves to measure the present condition of the portfolio and the methodologies used for its calculation serve as a tool to evaluate risk, be it in a collective or individual manner. Collective evaluation of the portfolio applies the following parameters for measuring risk: probability of default (PD), loss given default (LGD) and exposure at default (EAD). For further details please see Note 2 Significant Accounting Policies, section 7.4.5 Impairment of financial assets at amortized cost. For the evaluation of individual risk, parameters such as recovery rates estimated by score sheets that include financial, behavioral information, collaterals and qualitative variables, serve as elements for measuring risk and defining an allowance for loans and advances and lease losses for that borrower. 1 CIIU: International Standard Industrial Classification of All Economic Activities. The Bank is continuously monitoring the concentration of the risk groups, as well as carrying out a daily control of the exposure to different economic groups, evaluating the legal limits of indebtedness in order to fulfill the norms established about the concentration limits. The Bank elaborates international references determined by the rankings of external risks that allow the analysis of concentration levels in different geographic areas. On the other hand, at the legal level, the Bank is governed by the concepts and methodologies established by the international standards regarding the construction, administration and control of the concentration of economic groups. The following classifications are established for the analysis of concentration:  By country : based on the country in which the loans were originated.  By sector: 1  By categories: according to the portfolio categories of each agreement (commercial, financial leases, consumer loans, small business loans and mortgages).  By economic group: according to the characteristics of economic groups as established by regulations.  By maturity: according to the remaining term to loan maturity.  By past due days: this concentration evaluates loans that are more than one month overdue. b. Credit Quality Analysis - Loans and Financial Leases Rating System for Credit Risk Management Its principal aim is to determine the risk profile of the borrower, which is obtained through a rating. The rating for corporate loans is assigned principally based on the analysis of the interrelation of both qualitative and quantitative elements that can affect the fulfillment of the financial commitments acquired by a borrower. They take information on the financial statements, profit and loss statement, historical payment behavior both with the Bank and with other entities, and qualitative information on variables that are not explicit in the financial statements. The rating model is applied at the origination of the loan and is updated by a central qualification office to undertake a periodical evaluation of the loan portfolio, during the months of May and November each year. In the case of a retail customer, granting and behavior scoring models are used in order to identify the level of risk associated with the borrower. These models include information such as personal details, financial information, historical behavior, the total number of credit products and external information from credit bureaus. As the subsidiaries have their own internal rating models, for purposes of assessing the consolidated credit risk on a homogeneous basis, the Bank has established the following categories of risk in order to classify borrowers according to their payment behavior: Category Range % PD Description Commercial Consumer and Small Business Loans Mortgage A- Normal Risk 0 - 3.11 0 - 5 0 - 2 Loans and advances in this category are appropriately serviced. The borrower’s financial statements or its projected cash flows, as well as all other credit information available to the Bank, reflect adequate paying capacity. B- Acceptable Risk > 3.11 - 11.15 > 5 - 28 2 - 17 Loans and advances in this category are acceptably serviced and guaranty protected, but there are weaknesses in the payment capacity of the borrower which may potentially affect, on a temporary or permanent basis, the borrower’s ability to pay or its projected cash flows, to the extent that, if not timely corrected, would affect the normal servicing of the loans and advances. C- Appreciable Risk > 11.15 - 72.75 > 28 - 70 17 - 78 Loans and advances in this category represent insufficiencies in the borrower’s paying capacity or in the projected cash flow, which may compromise the normal servicing of the loans and advances. D- Significant Risk > 72.75 - 89.89 > 70 - 82 78 - 91 Loans and advances in this category have the same deficiencies as loans in category C, but to a larger extent; consequently, the probability of collection is highly doubtful. E- Unrecoverable >89.89 - 100 > 82 - 100 91 - 100 Loans and advances in this category are deemed uncollectible. Description of Loans and Financial Leases In order to evaluate and manage credit risk, the credits and financial leasing operations have been classified as:  Commercial and Financial Leases: Loans and financial leases granted to individuals or companies in order to carry out organized economic activities and are not classified as small business loans. The borrowers in this portfolio are mainly made up of companies, segmented in homogenous groups that are constituted according to size, annual sales or main activity. The following variables are part of this classification: Segment Incomes/Sales Corporate Companies with annual sales >= COP 80,000 M. Banistmo places borrowers with annual sales >= USD 10 M. Banco Agrícola and BAM place borrowers with annual sales >= USD 25 M. Business Companies with annual sales > = COP 20,000 M and < COP 80,000 M except for Banco Agrícola and BAM, which place borrowers with annual sales >= USD 5 M and < USD 25 M. Business Construction Constructors who dedicate themselves professionally to the construction of buildings to be sold or rented as their main activity, with annual sales >= COP 20,000 M and <= COP 45,000 M. They must have more than 3 projects executed as previous experience. Corporate Construction Constructors who dedicate themselves to the construction of buildings to be sold or rented as their main activity, with annual sales > COP 45,000 M. They must have more than 3 projects executed as previous experience. SME Construction Constructors who dedicate themselves professionally to the construction of buildings to be sold or rented as their main activity with annual sales >= COP 380 M and <= COP 20,000 M. They must have more than 3 projects executed as previous experience. Institutional Financing Financial sector institutions. Government Municipalities, districts, departments with their respective decentralized organizations and entities at the national level with incomes >= COP 20,000 M. SME Annual sales < COP 20,000 M, with a classification between small, medium, large and plus except for Banistmo which includes borrowers < USD 10 M in annual sales, for Banco Agrícola and BAM < USD 5 M.  Consumer: Loans and advances, regardless of amount, granted to individuals for the purchase of consumer goods or to pay for non-commercial or business services. These loans are classified as follows: Classification Vehicles Credits granted for the acquisition of vehicles. The vehicle financed is used as collateral for the loan. Credit cards Revolving credit limits for the acquisition of consumer goods, utilized by means of a plastic card. Payroll loans It is a credit line attached to an authorized individual payroll amount. Other loans Loans granted for the acquisition of consumer goods other than vehicles and Payroll loans Credit cards are not included in this segment. The counterparties in this portfolio are mainly individuals, segmented in homogenous groups, which are formed according to their size, which is calculated by their monthly income.  Mortgage: These are loans, regardless of amount, granted to individuals for the purchase of a new or used house, commercial real estate or to build a home. These loans include loans denominated in local units or local currency that are guaranteed by a senior mortgage on the property and that are financed with a total repayment term of 5 to 30 years. The counterparties in the mortgage loan are mainly made up of individuals segmented in homogenous groups, which are formed according to their size, which is calculated by their monthly income.  Small Business Loans: These are issued for the purpose of encouraging the activities of small business and are subject to the following requirements: their indebtedness with all entities can not exceed 120 minimum wages (excluding mortgage obligations for housing financing); (ii) The staff must not exceed 10 employees; (iii) The client's total assets, excluding mortgage assets, are less than 500 minimum wages. The borrowers in this portfolio are mainly individuals, segmented in homogenous groups, which are formed according to their commercial size, which is calculated by their monthly income. . Analysis of the behavior and impairment of the loan portfolio and financial lease operations As of December 31, 2018, Bank’s total loan portfolio valued in Colombian pesos registered an increase of 8.32%, driven by a generalized growth in all the companies of the Group. The growth in Panama, El Salvador and Guatemala was over 9%, partly explained by the devaluation of the Colombian peso against the U.S. dollar. The disbursements in Colombian pesos registered an increase of 12.07% compared to the previous year, mainly in the consumer loan portfolio. 2018 was characterized by moderate macroeconomic dynamics in all the countries where the Bank has a presence. The 30-day past due loan ratio (consolidated) stood at 4.33% in 2018 compared to 4.49% in 2017, driven by a decrease in the past-due portfolio of Personal and SME Banking which mitigated the impact of the increase in the past-due portfolio of Corporate Banking in Colombia.  Commercial loans and finance lease amounted to COP 117,798 billion, which represented an increase of 5.89% with respect to 2017. Its 30-day past due loan ratio was 3.56%.  Consumer loans stood at COP 31,993 billion, which represented an increase of 15.72% with respect to 2017. Its 30-day past due loan ratio was 4.93%.  Mortgage loans came to COP 22,870 billion, which represented an increase of 11.50% with respect to 2017. Its 30-day past due loan ratio was 6.95%.  Small Business loans ended at COP 1,156 billion, which represented an increase of 8.71% with respect to 2017. Its 30-day past due loan ratio was 12.01%. In order to monitor credit risk associated with clients, the Bank has established regular meetings conducted by a committee to identify events that can lead to a reduction in borrowers’ ability to pay. Generally, clients with good credit behavior could be included in the watch list in case of detecting any event that can lead to future financial difficulties to repay their loans; for instance, internal factors such as the economic activity, financial weakness, impacts of macroeconomic conditions, changes in corporate governance and other situations that could affect clients’ business. The amount and allowance of clients included in the described watch list, as of December 31, 2018 and 2017 is shown below. Watch List December 31 2018 Million COP Risk Level Amount % Allowance Level 1 – Low Risk 9,179,165 1.04% 95,896 Level 2 – Medium Risk 2,549,977 8.96% 228,461 Level 3 – High Risk 1,626,478 38.92% 633,101 Level 4 – High Risk 4,096,563 64.68% 2,649,837 Total 17,452,183 20.67% 3,607,295 Watch List December 31 2017 Million COP Risk Level Amount % Allowance Level 1 – Low Risk 4,938,711 2.32% 114,361 Level 2 – Medium Risk 1,641,169 4.98% 81,796 Level 3 - High Risk 3,806,554 33.21% 1,264,077 Level 4— High Risk 1,509,014 76.22% 1,150,212 Total 11,895,448 21.94% 2,610,446 Loans and Financial Leases Collateral The Bank obtains collateral for loans and leases in order to mitigate credit risk by foreclosing the collateral when the borrower cannot fully repaid the loan or lease. Collateral is considered in the determination of the allowance for loans and advances and lease losses when it complies with the following conditions:  Its fair value was established according to technical and objective criteria.  The Bank is granted a preference or an improved right to obtain the payment of the obligation, becoming an effective collateral.  Its performance is reasonably possible.  It is a payment source that sufficiently attends to the credit as per the requirement of the Bank.  When the borrower is a government entity, the collateral has a pledge certificate issued by the appropriate authority. The Bank has defined the criteria for the collateral enforceability, which are established according to the classification of loan portfolio. In addition, the Bank has set guidelines to value collaterals and the frequency of such valuations, as well as those guidelines related to the legalization, registry and maintenance of the collateral. Likewise, the Bank has defined the criteria for insurability, custody and the necessary procedures for their cancellation. The update of the fair value of mortgages and vehicles collaterals for the loan portfolio is made according with collateral the policy. The methodology used to estimate the fair value of the properties is applied by external and independent entities. Updating the fair value of the vehicles is done through guides and valid values commonly used as reference to set the value of a vehicle. The fair value of real state and vehicles are classified in levels 2 and 3 depending on the observability and significance of the inputs used in the valuation techniques according to the hierarchy established by IFRS 13. During the reporting period, the Group’s collateral policies have not changed significantly in relation to the way collateral is held and its overall quality. The following table shows loans and financial leases, classified in commercial, consumer, mortgage, financial leases and small business loans, and disaggregated by type of collateral: December 31, 2018 Amount Covered by Collateral In Millions of COP Nature of the Collateral Commercial Consumer Mortgage Financial Leasing Small Business Total Real Estate and Residential 21,209,517 1,744,581 20,720,459 84 282,822 43,957,463 Goods Given in Real Estate Leasing - - 243 12,752,932 - 12,753,175 Goods Given in Leasing Other Than Real Estate - - - 5,900,913 - 5,900,913 Stand by Letters of Credit 667,976 229 - - - 668,205 Security Deposits 470,400 369,689 - - 76,136 916,225 Guarantee Fund 2,595,913 138 - 118,747 288,890 3,003,688 Sovereign of the Nation - - - - - - Collection Rights 3,992,592 49,910 - - 1,452 4,043,954 Other Collateral (Pledges) 4,118,947 4,713,359 48,098 20 14,158 8,894,582 Without Guarantee (Uncovered Balance) 61,545,303 25,115,475 2,101,885 4,425,508 492,740 93,680,911 Total loans and financial leases 94,600,648 31,993,381 22,870,685 23,198,204 1,156,198 173,819,116 December 31, 2017 Amount Covered by Collateral In Millions of COP Nature of the Collateral Commercial Consumer Mortgage Financial Leasing Small Business Total Real Estate and Residential 19,529,154 1,572,455 18,959,433 - 273,248 40,334,290 Goods Given in Real Estate Leasing 7,725,197 - - 2,392,075 - 10,117,272 Goods Given in Leasing Other Than Real Estate 5,124,246 112,724 - 577,447 - 5,814,417 Stand by Letters of Credit 455,793 - - - - 455,793 Security Deposits 779,008 300,730 - - 56,588 1,136,326 Guarantee Fund 2,583,354 147 - - 301,045 2,884,546 Sovereign of the Nation 12,710 - - - - 12,710 Collection Rights 3,220,882 41,597 - - 1,119 3,263,598 Other Collateral (Pledges) 3,163,456 3,887,548 32,524 31 20,227 7,103,786 Without Guarantee (Uncovered Balance) 46,403,441 21,730,913 1,520,251 19,279,398 411,353 89,345,356 Total loans and financial leases 88,997,241 27,646,114 20,512,208 22,248,951 1,063,580 160,468,094 The Bank closely monitors collateral held for financial assets that are considered in Stage 3, as it becomes more likely that the Bank will take possession of collateral to mitigate potential credit losses. Financial assets that are considered Stage 3 and related collateral held in order to mitigate potential losses are shown below: December 31, 2018 In Millions of COP Classification Amount Allowance Total Fair Value of Collateral Commercial 775,689 239,720 535,968 2,528,495 Consumer Mortgage 139,084 21,883 117,201 173,482 Small Business Loans Financial Leases 666,495 201,981 464,514 974,274 Total credit assets 1,581,268 463,584 1,117,683 3,676,251 A portion of the Bank’s financial assets originated by the mortgage and commercial business has sufficiently low ‘loan to value’ (LTV) ratios, which results in no loss allowance being recognized in accordance with the Bank’s expected credit loss model. The carrying amount of such financial assets is COP 281,722 as at 31 December 2018. Foreclosed assets and other credit mitigants Assets received in lieu of payment (foreclosed assets) are recognized on the statement of financial position when current possession of the asset takes place. Foreclosed assets represented by immovable or movable property are received based on a commercial valuation. Foreclosed assets such as equity securities and other financial assets, are received based on market value. During 2018 and 2017, foreclosed assets received amounted to COP 521,718 and COP 331,057, respectively. The Bank classifies foreclosed assets after acknowledgment of the exchange operation according to the intention of use, as follows:  Non-current assets held for sale.  Other marketable assets.  Other non-marketable assets.  Financial instruments (investments).  Inventories.  Premises and equipment. Collaterals classified as non-current assets held for sale are those expected to be sold in the following 12 months. When there are market restrictions that do not allow their realization in less than 12 months and this period is extended, retroactive depreciation must be charged to results and the asset value will be reduced by the depreciation value. c. Risk Concentration – Loans and Advances The analysis of credit risk concentration is done by monitoring the portfolio by groups such as: loan categories, maturity, past due days, economic sector, country and economic group, as shown here:  Loans concentration by category The composition of the credit portfolio in commercial, consumer, mortgage, financial leases and small business loans categories are as follows: Composition December 31 2018 December 31, 2017 In millions of COP Commercial 94,600,648 88,997,241 Corporate 55,562,618 58,661,267 SME 16,524,571 17,184,059 Others 22,513,459 13,151,915 Consumer 31,993,381 27,646,114 Credit card 7,026,689 6,255,277 Vehicle 3,253,060 2,915,705 Payroll loans 7,451,381 6,970,783 Others 14,262,251 11,504,349 Mortgage 22,870,685 20,512,208 VIS 1 5,778,067 5,491,926 Non- VIS 17,092,618 15,020,282 Financial Leases 23,198,204 22,248,951 Small Business Loan 1,156,198 1,063,580 Loans and advances to customers and financial institutions 173,819,116 160,468,094 Allowance for loans and advances and lease losses (10,235,831) (8,223,103) Total net loan and financial leases 163,583,285 152,244,991 1 VIS: Social Interest Homes, corresponds to mortgage loans granted by the financial institutions of amounts less than 135 minimum wages.  Concentration of loan by maturity The following table shows the ranges of maturity for the credit loans and financial leases, according for the remaining term for the completion of the contract: December 31, 2018 Maturity Less Than 1 Year Between 1 and 3 Years Between 3 and 5 Years Greater Than 5 Years Total In millions of COP Commercial 31,052,548 18,846,830 16,216,100 28,485,170 94,600,648 Corporate 16,569,691 8,491,758 11,335,723 19,165,446 55,562,618 SME 5,253,678 5,482,139 2,774,471 3,014,283 16,524,571 Others 9,229,179 4,872,933 2,105,906 6,305,441 22,513,459 Consumer 749,322 4,562,956 12,069,707 14,611,396 31,993,381 Credit card 100,367 244,218 1,073,539 5,608,565 7,026,689 Vehicle 60,754 610,398 1,538,979 1,042,929 3,253,060 Payroll loans 62,657 624,660 1,397,974 5,366,090 7,451,381 Others 525,544 3,083,680 8,059,215 2,593,812 14,262,251 Mortgage 58,613 175,572 479,086 22,157,414 22,870,685 VIS 11,056 51,768 117,404 5,597,839 5,778,067 Non-VIS 47,557 123,804 361,682 16,559,575 17,092,618 Financial Leases 2,393,428 2,560,578 4,260,513 13,983,685 23,198,204 Small business loans 256,093 477,456 220,105 202,544 1,156,198 Total gross loans and financial leases 34,510,004 26,623,392 33,245,511 79,440,209 173,819,116 December 31, 2017 Maturity Less Than 1 Year Between 1 and 3 Years Between 3 and 5 Years Greater Than 5 Years Total In millions of COP Commercial 26,641,770 19,583,956 13,561,261 29,210,254 88,997,241 Corporate 17,054,923 11,588,101 8,533,725 21,484,518 58,661,267 SME 5,568,251 5,684,612 2,973,761 2,957,435 17,184,059 Others 4,018,596 2,311,243 2,053,775 4,768,301 13,151,915 Consumer 1,393,022 4,826,773 12,035,699 9,390,620 27,646,114 Credit card 761,294 1,104,571 2,384,220 2,005,192 6,255,277 Vehicle 67,118 718,610 1,499,980 629,997 2,915,705 Payroll loans 52,087 692,079 1,325,911 4,900,706 6,970,783 Others 512,523 2,311,513 6,825,588 1,854,725 11,504,349 Mortgage 50,102 148,851 389,456 19,923,799 20,512,208 VIS 12,238 40,182 93,917 5,345,589 5,491,926 Non-VIS 37,864 108,669 295,539 14,578,210 15,020,282 Financial Leases 3,101,344 2,698,394 3,546,370 12,902,843 22,248,951 Small business loans 232,596 479,646 182,893 168,445 1,063,580 Total gross loans and financial leases 31,418,834 27,737,620 29,715,679 71,595,961 160,468,094  Concentration by past due days The following table shows the loans and financial leases according to past due days. A

IMPACTS ON APPLICATION OF NEW S

IMPACTS ON APPLICATION OF NEW STANDARDS	12 Months Ended
	Dec. 31, 2018
Disclosure of expected impact of initial application of new standards or interpretations [abstract]
Disclosure of expected impact of initial application of new standards or interpretations [text block]	NOTE 32. IMPACTS ON APPLICATION OF NEW STANDARDS a) Accounting Pronouncements Applicable in 2018 IFRS 9 financial instruments: 9 as issued in July 2014 from and as of from January 1, 2018 . As permitted by the transitional provisions of IFRS 9 , the Bank elected not to restate comparative figures. Any adjustments to the carrying amounts of financial assets and liabilities at the date of transition were recognized in the retained earnings. The changes in the significant accounting policies related to financial instruments and the adjustments to the items presented previously in the financial statements are described below. · Classification of financial assets: · Business model assessment: - The policies and objectives for the portfolio and the operation of those policies in practice. In particular, whether management’s strategy focuses on earning contractual interest revenue, maintaining a particular interest rate profile, matching the duration of the financial assets to the duration of the liabilities that are funding those assets or realizing cash flows through the sale of the assets. - How the performance of the portfolio is evaluated and reported to the Bank’s management. - The risks that affect the performance of the business model and how those risks are managed. - How managers of the portfolio are compensated, specifically, whether the compensation is based on the fair value of assets managed or the contractual cash flows collected. - The frequency, volume and timing of sales in prior periods, the reasons for such sales and its expectations about future sales activity. However, information about sales activity is not considered in isolation, but as part of an overall assessment of how the Bank’s objective for managing the financial assets is achieved and how cash flows are realized. · Determination of contractual cash flows as “solely payments of principal and interest” (SPPI) on the principal amounting outstanding: In assessing whether the contractual cash flows are solely payments of principal and interest, the Bank considers the contractual terms of the instrument. This includes assessing whether the financial asset contains a contractual term that could change the timing or amount of contractual cash flows such that it would not meet this condition. In making the SPPI assessment, the Bank considers: - Contingent events that would change the amount and timing of cash flows - Leverage features - Prepayment and extension terms - Terms that limit the Bank’s claims to cash flows from specified assets - Features that modify consideration of the time value of money As a result of the SPPI assessment, the Bank has determined that the contractual cash flows of loan portfolio and debt instruments, except for TIPS (mortgage securities) class ‘C’ and ‘MZ’, are solely payments of principal and interest of the principal amount outstanding. The Bank’s policies related to the classification of financial instruments are expressed in Note 2.D.7.4 to the Consolidated Financial Statements. Prior to the date of application of IFRS 9, 2014, portfolios that were managed on the basis of fair value according to a documented strategy, internal reports or evaluations of the performance of such instruments based on their fair value were not designated by the Bank as financial instruments as measured at fair value through profit or loss. On the transition date, such portfolios remained not designated as such. In the previous adoption of IFRS 9, 2013, the Bank made an irrevocably election to present subsequent changes in equity instruments that were not held for trading in other comprehensive income. Such designations remain unchanged. The measurement categories and carrying amount for financial instruments as of December 31, 2018, under IFRS 9 (2013) and the new categories in IFRS 9 (2014) are shown below: Note Original classification under IFRS 9 (2013) New Classification under IFRS 9 (2014) Original carrying amount under IFRS 9 (2013) New carrying amount under IFRRS 9 (2014) Impact to equity Financial assets Cash and cash equivalents 4 Amortized cost Amortized cost 18,165,644 18,165,644 - Debt securities (a) 5.1 FVTPL FVOCI 2,105,230 2,106,468 1,238 Debt securities 5.1 FVTPL FVTPL 8,596,625 8,596,947 322 Debt securities (b) 5.1 Amortized cost FVOCI 850,535 884,884 34,349 Debt securities (c) 5.1 Amortized cost FVTPL 176,229 180,976 4,747 Debt securities 5.1 Amortized cost Amortized cost 3,130,804 3,121,981 (8,823) Equity securities 5.2 FVTPL FVTPL 988,455 988,455 - Equity securities 5.2 FVOCI FVOCI 529,375 529,375 - Derivatives 5.3 FVTPL FVTPL 1,134,372 1,134,372 - Loans and financial leases 6 Amortized cost Amortized cost 152,244,991 151,209,930 (1,035,061) Total financial Assets 187,922,260 186,919,032 (1,003,228) Note Original classification under IFRS 9 (2013) New Classification under IFRS 9 (2014) Original carrying amount under IFRS 9 (2013) New carrying amount under IFRRS 9 (2014) Impact to equity financial liabilities Customer deposits 14 Amortized cost Amortized cost 131,959,215 131,959,215 - Interbank 15 Amortized cost Amortized cost 1,084,591 1,084,591 - Repos 15 Amortized cost Amortized cost 3,236,128 3,236,128 - Derivatives 5.2 FVTPL FVTPL 945,853 945,853 - Financial liabilities 16 Amortized cost Amortized cost 13,822,152 13,822,152 - Issued debt securities 17 Amortized cost Amortized cost 19,648,714 19,704,624 (55,910) Other liabilities 20 N/A N/A 151,789 139,999 11,790 Total financial liabilities 170,848,442 170,892,562 (44,120) The application of revised accounting policies responsive to IFRS 9 resulted in the following adjustments: (a) LETES (El Salvador Public Treasury Bills) issued by the Government of El Salvador which amounted to COP 129,962, bonds issued by the Government of Guatemala to COP 206,031, bonds issued by The Republic of Panama to COP 923,787 and treasury bonds of the United States of America to COP ( 475,428 (b) Bonds issued by the Government of Guatemala which amounted to COP 558,516 and term deposit certificates in foreign currency to COP 292,019 (c) Bonds issued by the Guatemalan Government which amounted to COP 166,608 and corporate bonds of other Guatemalan issuers to COP 9,621 The reconciliation of the carrying amount and measurement categories between IFRS 9 (2013) and IFRS 9 (2014) as of January 1, 2017 for debt instruments is described below: Closing balance as of December 31, 2017 under IFRS 9 (2013) Reclassification Remeasurement (1) Opening balance as of January 1, 2018 under IFRS 9 (2014) Debt instruments at fair value Through profit or loss Initial balance 10,701,855 - 322 10,702,177 Reclassification to fair value through other comprehensive income (OCI) (2,105,230) - (2,105,230) Reclassification from Amortized cost 176,229 4,747 180,976 Final balance 10,701,855 (1,929,001) 5,069 8,777,923 Debt instruments measured at amortized cost Initial balance 4,157,568 - (8,823) 4,148,745 Reclassification to fair through profit or loss (176,229) - (176,229) Reclassification to fair value through other comprehensive income (OCI) (850,535) - (850,535) Final balance 4,157,568 (1,026,764) (8,823) 3,121,981 Debt instruments measured at fair value through other comprehensive income Initial balance - - - - Reclassification from fair value through profit or loss 2,105,230 1,238 2,106,468 Reclassification from amortized cost 850,535 34,349 884,884 Final balance - 2,955,765 35,587 2,991,352 Total changes in balances, reclassifications and re-measurements of financial assets 14,859,423 - 31,833 14,891,256 (1) The effects presented contain changes due to the measurement of investment from Amortized cost to fair value and new loss allowance for credit risk of those instruments classified as amortized cost Impairment: The impact of the allowance for credit losses at the end of 2017, under the incurred loss model of IAS 39 and the new allowance under the expected credit losses model determined in accordance with IFRS 9 to January 1, 2018, is presented below: December 31, 2017 under IAS 39 Remeasurement January 1, 2018 under IFRS 9 Financial Instruments Impairment of loan portfolio at amortized cost and financial leasing operations 8,223,103 1,035,061 9,258,164 Impairment of debt instruments at amortized cost 1,201 8,823 10,024 Impairment of debt instruments at fair value through other comprehensive income - 5,705 5,705 Other liabilities (loan commitments and guarantees) 151,789 (11,790) 139,999 Total allowance for credit losses 8,376,093 1,037,799 9,413,892 Retained earnings: The following table analyses the impact of transition to IFRS 9 on Retained earnings: Impact of adopting IFRS 9 (2014) In millions of COP Retained earnings Closing balance as of 31 December 2017 under IFRS 9 (2013) 3,568,182 Recognition of expected credit losses under IFRS 9 (2014) for debt instruments at FVOCI (4,837) Recognition of expected credit losses under IFRS 9 (2014) for debt instruments at Amortized cost (8,736) Reclassification of investments in Debt instruments 24,126 Recognition of expected credit losses under IFRS 9 (2014) for loans and financial leases (948,785) Recognition of expected credit losses under IFRS 9 (2014) for Financial guarantees and loan commitments 16,990 Recognition of Debt modifications that do not result in derecognition (55,910) Diferred tax 245,512 Total impact to retained earnings (731,640) Opening balance as of (01 January 2018) under IFRS 9 (2014) 2,836,542 Non-controling interest (18,141) Effect of adoption of IFRS 9 (2014) in retained earnings (749,781) · Modification of financial instruments that do not result in derecognition: 55,910 For further information please see note 2.D.7.4 to the Consolidated Financial Statements. IFRS 15, Revenue from Contracts with Customers: On January 1, 2018, the Bank adopted IFRS 15 Revenue from contracts with customers. The transition method used by the Bank in the implementation of IFRS 15 was the modified retrospective approach, due to it opting to retroactively apply this Standard only to current contracts which were not completed by the initial application date, adopting the standard as of January 1, 2018. In the process of implementing IFRS 15 in the Bank, the contracts agreed with customers were reviewed, in order to establish the impacts on the separation of the components included in them. For this purpose, the following activities were carried out: • Evaluation of promised services in contracts, identifying performance obligations. • Evaluation of the performance obligations of each contract and whether there are impacts for compliance with the new standard. • Analysis of concessions, incentives, bonuses, price adjustments clauses, penalties, discounts and refunds or similar elements contained in the agreements made. • Identification of possible variable compensations included in the contracts and determination as to whether the recognition of the same is being carried out appropriately. • Analysis of loyalty programs with customers and packages (product grouping) and whether they have impacts for compliance with the new standard. • Identification and determination of internal post-implementation controls to ensure compliance with accounting and disclosure requirements based on new products and services that are developed within the Bank to meet the financial needs of its customers. In carrying out the above activities and in evaluating the criteria of the standard, it was identified that there are no changes to the recognition of revenues for the Bank given that the accounting procedures are in accordance with IFRS 15. However, the adoption of the new standard generated an impact at the disaggregation level in the figures disclosed in the Note 24.3 for the years 2016 and 2017 in the Bank’s annual report in 2017, because of the definition of the services offered by the Bank. b) Recently Issued Accounting Pronouncement Applicable in 2019 IFRS 16 Leases: On January 1, 2019, the Bank will adopt IFRS 16 Leasing issued on January 2016. Transition Model: At the end of the 2018 period, the Bank has some agreements that do not have the legal form of a lease, so it determined that the agreement contains a lease a. To apply the definition of lease of IFRS 16 to all its contracts; or b. To apply the practical solution and do not reevaluate whether a contract is, or contains, a lease. The Bank plans not to accept the practical solution proposed by the standard, therefore, it will evaluate all contracts to identify implicit leases. Lessee: The Bank plans to apply the exemptions provided by the Standard in paragraph 5 for short-term and low-value leases, so these contracts will be recognized as an expense on a straight-line basis over the lease term. The Bank is evaluating the impact of IFRS 16 in its financial statements, identifying that the most significant effect at the end of the 2018 period is the recognition of assets and liabilities of its operating lease agreements, especially properties used in the operation of offices. In addition, the nature of the expenses corresponding to operating lease contracts as lessee will change with IFRS 16, from lease expenses to charges for depreciation of rights to use the asset and financial expenses in lease liabilities. The transition model chosen by The Bank is the modified retrospective, where the right-of-use assets will be measured as if IFRS 16 had always been applied, using the incremental rate of indebtedness known at the transition date. The preliminary impact of the adoption of this new standard could generate the recognition of assets for right of use between COP 1,980,830 and 2,174,830 and lease liabilities between COP 2,393,442 and 2,587,442, which according to the defined option of valuation of the right-of-use could generate a decrease in retained earnings as of January 1, 2019 between COP 309,815 and 503,815. On the other hand, a net impact on the deferred tax of approximately COP 120,000 is estimated. Once the analyzes are finalized, the final figures of the impacts on the adoption of this new standard will be defined and recognized. There will be no early adoption of this standard As of January 1, 2019, the recognition of some lease agreements will influence the deferred tax, both in the initial recognition of the right-of-use asset and the lease liability; it will also have an implication in subsequent periods, because the tax regulation for the management of the lease differs from this accounting recognition. The Bank plans to use the following practical solutions when applying IFRS 16 using the modified adoption method for leases previously classified as operating leases using IAS 17: a) Do not carry out an assessment of the impairment of the value of the assets for the right-to-use lease contracts, because prior to the transition to IFRS 16, said contracts were evaluated and none was determined to be onerous; b) For contracts whose maturity is within 12 months following the date of initial application, they will be recognized as short-term leases. c) The initial direct costs of measuring the asset by right to use will be excluded on the date of initial application; and d) The Bank will use hindsight, such as in determining the lease term if the contract contains options to extend or terminate the leases

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2018
Disclosure of subsequent events [Abstract]
Disclosure of events after reporting period [text block]	NOTE 33. SUBSEQUENT EVENTS The consolidated financial statements were approved by the Board of Director on Febreaury 19, 2019. Arrendamiento Operativo CIB S.A.S. On January 16, 2019 the Bank’s subsidiaries Renting Colombia S.A.S and Inversiones CFNS S.A.S have entered into an agreement with Arval Relsa for the sale of 100% of the shares of Arrendamiento Operativo CIB S.A.C – Renting Peru, an operational leasing company incorporated and with operations in Peru. The purchase price for the shares was settled for USD 21,893 (gross basis without taking into consideration any tax withholding) and the transaction was closed on March 29, 2019. Arval Relsa is the joint venture between Arval (subsidiary of BNP Paribas, with more than one million vehicles in operational leasing) and Relsa (company with 15 years of experience in the Peruvian market) that seeks to strengthen the car leasing and vehicle fleet management businesses in Peru and Chile.

SIGNIFICANT ACCOUNTING POLICI_2

SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2018
Disclosure of Significant Accounting Policies [Abstract]
Basis for preparation	A. Basis for preparation The consolidated financial statements of the Bank are prepared in accordance with the International Financial Reporting Standards (hereinafter, IFRS) issued by the International Accounting Standards Board (hereinafter, IASB), as well as the interpretations issued by the International Financial Reporting Interpretations Committee (hereinafter, IFRS-IC). The preparation of financial statements in conformity with IFRS requires the use of accounting estimates which, by definition, will seldom equal the actual results. Therefore, the estimates and assumptions are constantly reviewed. Any revision is recongized in the same period if it affects the reviewed period; or in the reviewed period and future periods if it affects all the current and future periods. Assets and liabilities are measured at cost or amortized cost, except for some financial assets and liabilities and investment properties that are measured at fair value. Financial assets and liabilities measured at fair value comprise those classified as assets and liabilities at fair value through profit or loss, debt instruments and equity securities measured at fair value through other comprehensive income (“OCI”) and derivative instruments. Likewise, the carrying value of assets and liabilities that are designated as hedged items in a fair value hedge, is adjusted for changes in fair value attributable to the hedged risk. The consolidated financial statements are stated in Colombian pesos and its figures are stated in millions, except earnings per share, diluted earnings per share and the market exchange rate, which are stated in Colombian pesos, while other currencies (dollars, euro, pounds, etc.) are stated in thousands. The Parent Company’s financial statements, which have been prepared in accordance with “Normas de Contabilidad e Información Financiera” (NCIF) applicable to separate financial statements, are those that serve as the basis for the distribution of dividends and other appropriations by the stockholders.
Presentation of financial statements	B. Presentation of financial statements The Bank presents the consolidated statement of financial position ordered by liquidity and the consolidated statement of income is prepared based on the nature of expenses. Revenues and expenses are not offset, unless such compensation is permitted or required by any accounting standard or interpretation and are described in the Bank's policies. The statement of comprehensive income presents net income and items of other comprehensive income classified by nature and grouped into those that will not be reclassified subsequently to profit or loss and those that will be reclassified when specific conditions are met. The Bank discloses the amount of income tax relating to each item of OCI. The consolidated statement of cash flows was prepared using the indirect method, whereby net income is adjusted for the effects of transactions of a non-cash nature, changes during the period in operating assets and liabilities, and items of income or expense associated with investing or financing cash flows.
Consolidation	C. Consolidation 1. Subsidiaries The consolidated financial statements include the financial statements of Bancolombia S.A. and its subsidiaries as of and for the periods ended on December 31, 2018 and 2017. The Parent Company consolidates the financial results of the entities on which it exerts control. In accordance with IFRS 10, a subsidiary is an entity controlled by any of the entities that comprise The Bank, as long as the controlling entity has:  Power over the investee that give it the ability to direct their relevant activities that significantly affect the investee’s returns.  Exposure or rights to variable returns for its involvement with the investee.  Ability to use its power over the investee to affect the investor’s returns The Parent Company has the following subsidiaries making up the Bank´s organizational structure, which is currently registered as a corporate group: ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Fiduciaria Bancolombia S.A. Sociedad Fiduciaria Colombia Trust 98.81% 98.81% 98.81% Banca de Inversión Bancolombia S.A. Corporación Financiera Colombia Investment banking 100.00% 100.00% 100.00% Valores Bancolombia S.A. Comisionista de Bolsa Colombia Securities brokerage 100.00% 100.00% 100.00% Renting Colombia S.A.S. Colombia Operating leasing 100.00% 100.00% 100.00% Transportempo S.A.S. Colombia Transportation 100.00% 100.00% 100.00% Valores Simesa S.A. (1) Colombia Investments 67.73% 68.57% 68.57% Inversiones CFNS S.A.S. Colombia Investments 99.94% 99.94% 99.94% BIBA Inmobiliaria S.A.S. Colombia Real estate broker 100.00% 100.00% 100.00% FCP Fondo Colombia Inmobiliario. (2) Colombia Real estate broker 51.29% 63.47% 62.55% Prosicol S.A.S. (3) Colombia Pre-operating stage - - 68.57% Fideicomiso "Lote Abelardo Castro". Colombia Mercantil trust 67.39% 68.23% 68.23% Bancolombia Panamá S.A. Panama Banking 100.00% 100.00% 100.00% Sistemas de Inversiones y Negocios S.A. Sinesa Panama Investments 100.00% 100.00% 100.00% Banagrícola S.A. Panama Investments 99.16% 99.16% 99.16% Banistmo S.A. Panama Banking 100.00% 100.00% 100.00% Banistmo Investment Corporation S.A. Panama Trust 100.00% 100.00% 100.00% Financomer S.A. Panama Financial services 100.00% 100.00% 100.00% Leasing Banistmo S.A. Panama Leasing 100.00% 100.00% 100.00% Valores Banistmo S.A. Panama Purchase and sale of securities 100.00% 100.00% 100.00% Suvalor Panamá Fondos de Inversión S.A. Panama Holding 100.00% 100.00% 100.00% ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Suvalor Renta Fija Internacional Largo Plazo S.A. Panama Collective investment fund 100.00% 100.00% 100.00% Suvalor Renta Fija Internacional Corto Plazo S.A. Panama Collective investment fund 100.00% 100.00% 100.00% Banistmo Asset Management Inc. (4) Panama Purchase and sale of securities - - 100.00% Banistmo Capital Markets Group Inc. (5) Panama Purchase and sale of securities 100.00% 100.00% 100.00% Van Dyke Overseas Corp. (6) Panama Real estate broker - 100.00% 100.00% Inmobiliaria Bickford S.A. (6) Panama Real estate broker - 100.00% 100.00% Williamsburg International Corp. (6) Panama Real estate broker - 100.00% 100.00% Anavi Investment Corporation S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Desarrollo de Oriente S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Steens Enterpresies S.A. (5) Panama Portfolio holder 100.00% 100.00% 100.00% Ordway Holdings S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Grupo Agromercantil Holding S.A. Panama Holding 60.00% 60.00% 60.00% Banco Agrícola S.A. El Salvador Banking 97.36% 97.36% 97.36% Arrendadora Financiera S.A. Arfinsa El Salvador Leasing 97.37% 97.37% 97.36% Credibac S.A. de C.V. El Salvador Credit card services 97.36% 97.36% 97.36% Valores Banagrícola S.A. de C.V. El Salvador Securities brokerage 98.89% 98.89% 98.89% Inversiones Financieras Banco Agrícola S.A IFBA El Salvador Investments 98.89% 98.89% 98.89% Gestora de Fondos de Inversión Banagricola S.A. El Salvador Administers investment funds 98.89% 98.89% 98.89% Arrendamiento Operativo CIB S.A.C. (7) Peru Operating leasing 100.00% 100.00% 100.00% Fondo de Inversión en Arrendamiento Operativo - Renting Perú (8) Peru Car Rental - 100.00% 100.00% Capital Investments SAFI S.A. (8) Peru Trust - 100.00% 100.00% FiduPerú S.A. Sociedad Fiduciaria (7) Peru Trust 98.81% 98.81% 98.81% Leasing Perú S.A. (8) Peru Leasing - 100.00% 100.00% Banagrícola Guatemala S.A .(8) Guatemala Outsourcing - 99.16% 99.16% Banco Agromercantil de Guatemala S.A. Guatemala Banking 60.00% 60.00% 60.00% Seguros Agromercantil de Guatemala S.A. Guatemala Insurance company 59.17% 59.17% 59.17% Financiera Agromercantil S.A. Guatemala Financial services 60.00% 60.00% 60.00% Agrovalores S.A. Guatemala Securities brokerage 60.00% 60.00% 60.00% Tarjeta Agromercantil S.A. (8) Guatemala Credit Card - 60.00% 60.00% Arrendadora Agromercantil S.A. Guatemala Operating Leasing 60.00% 60.00% 60.00% Agencia de Seguros y Fianzas Agromercantil S.A. Guatemala Insurance company 60.00% 60.00% 60.00% Asistencia y Ajustes S.A. Guatemala Services 60.00% 60.00% 60.00% Serproba S.A. Guatemala Maintenance and remodelling services 60.00% 60.00% 60.00% Servicios de Formalización S.A. Guatemala Loans formalization 60.00% 60.00% 60.00% ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Conserjeria, Mantenimiento y Mensajería S.A. Guatemala Maintenance services 60.00% 60.00% 60.00% Media Plus S.A. (8) Guatemala Advertising and marketing - 60.00% 60.00% Mercom Bank Ltd. Barbados Banking 60.00% 60.00% 60.00% New Alma Enterprises Ltd. Bahamas Investments 60.00% 60.00% 60.00% Bancolombia Puerto Rico Internacional Inc. Puerto Rico Banking 100.00% 100.00% 100.00% Bancolombia Caymán S.A. Cayman Islands Banking 100.00% 100.00% 100.00% Bagrícola Costa Rica S.A. Costa Rica Outsourcing 99.16% 99.16% 99.16% (1) The decrease in the shareholding is due to the repurchase of outstanding stock by the subsidiary. (2) During 2018, the Bank's shareholding decreased in the subsidiary's capitalization process. (3) Investment sold by Valores Simesa during 2017. (4) Investment absorbed by Banistmo Capital Markets Group, Inc. during 2017. (5) Investments in non-operational stage. (6) Investment absorbed by Banistmo Capital Markets Group, Inc. during 2018. (7) Investment classified as assets held for sale. See Note 12 Assets held for sale and Inventories. (8) Investment liquidated during 2018. When necessary, adjustments are made to the accounting principles in the financial statements of subsidiaries to bring their accounting policies into line with the Bank’s accounting policies. All intragroup assets and liabilities, equity, income, expenses and cash flows relating to transactions between members of the Bank are eliminated in full on consolidation. Non-controlling interests in controlled entities are presented in profit or loss and equity separately from the Parent Company stockholders’ equity and profit or loss. When the Bank loses control over a subsidiary, any residual interest remaining on the Bank’s balances is measured at fair value; gains or losses arising from this measurement are recognized in net income There are restrictions on the ability of the Parent Company to obtain distributions of capital, due to the regulatory requirements of its subsidiaries in Panama. Banistmo and Bancolombia Panama have net assets before intercompany eliminations amounting to COP 8,186,449 and COP 6,872,171 at December 31, 2018 and 2017, respectively. The loans and financial leases granted by those subsidiaries are subject to prudential regulation in Panama issued by the Panamanian Superintency of Banks including a requirement to maintain minimum reserves as a countercyclical capital buffer. For the years ended at December 31, 2018 and 2017, the reserves recognized amounted to COP 1,020,913 and COP 616,814. These requirements restrict the ability of the aforementioned subsidiaries to make remittances of dividends to Bancolombia S.A., the ultimate parent, except in the event of liquidation. 2. Transactions between entities under common control Combination of entities under common control, i.e. transactions in which all the combining entities are under the control of the Bank both before and after the combination, and that control is not transitory, are outside the scope of the IFRS 3- Business combinations. Currently, there is no specific guidance for these transactions under IFRS, therefore, as permitted by IAS 8, the Bank has developed an accounting policy considering the pronouncements of other standard-setting bodies. The assets and liabilities recognized as a result of transactions between entities under common control are recognized at the carrying value of the acquiree’s financial statements. The Bank presents the net assets received prospectively from the date of the transfer. 3. Investments in associates and joint ventures An associate is an entity over which the Bank has significant influence. Significant influence is the power to participate in the financial and operating policy decisions of the investee but is not control or joint control over those policies. A joint venture is an entity that the Bank controls jointly with other participants, where the parties maintain a contractual agreement that establishes joint control over the relevant activities of the entity (which only exists when decisions about those activities require unanimous consent of the parties sharing control) and the parties have rights to the net assets of the joint arrangement. At the acquisition date, the excess of the acquisition cost of the associate or joint venture shares exceeding the Bank´s share of the net fair value of identifiable assets and liabilities of the investee is recognized as goodwill and it is included in the carrying amount of the investment and it is not amortized. When necessary, the entire carrying amount of the investment (including goodwill) is tested for impairment as a single asset in accordance with IAS 36 Impairment of Assets Impairment losses are recognized in net income and are calculated as the difference between the recoverable amount of the associate or joint venture, using the higher of its value in use and its fair value less costs of disposal, and its carrying value. The results and assets and liabilities of associates or joint ventures are incorporated in the consolidated financial statements using the equity method of accounting, except when the investment, or a portion thereof, is classified as held for sale, in which case it is accounted for in accordance with IFRS 5. When an investment in an associate or joint venture is held by, or is held indirectly through, an entity that is a venture capital organization, or a mutual fund, unit trust or similar entities, and such investment is measured at fair value through profit or loss in that entity, the Bank may elect to measure investments in those associates and joint ventures at fair value through profit or loss in the consolidated financial statements. This election is applied on an investment by investment basis. Under the equity method, the investment is initially recorded at cost and adjusted thereafter to recognize the Bank’s share of the profits or loss and other comprehensive income of the associate or join venture. When the Bank's share of losses of an associate or joint venture exceeds the Bank's interest in that associate or joint venture (which includes any long-term interests that, in substance, form part of the Bank's net investment in the associate or joint venture), the Bank discontinues recognizing its share of further losses. Additional losses are recognized only to the extent that the Bank has incurred legal or constructive obligations or made payments on behalf of the associate or joint venture. When the equity method is applicable, adjustments are considered in order to adopt uniform accounting policies of the associate or joint venture with the Bank. The portion that corresponds to the Bank for changes in the investee´s other comprehensive income items is recognized in the consolidated statement of comprehensive income as “Unrealized gain/(loss) on investments in associates and joint ventures using equity method” and gains or losses of the associate or joint venture are recognized in the consolidated statement of income as “Dividends received and share of profits of equity method investees”, in accordance with the Bank's participation. Gains and losses resulting from transactions between the Bank and its associate or joint venture are recognized in the Bank´s consolidated financial statements only to the extent of unrelated investor´s interest in the associate or joint venture. The equity method is applied from the acquisition date until the significant influence or joint control over the entity is lost. The unrealized gain or loss of an associate or joint venture is presented in the consolidated statement of comprehensive income, net of tax. Changes in the investment´s participation that arise from changes in other comprehensive income of an associate or joint venture are recognized directly in the investor’s statement of other comprehensive income. The dividends received from the associate or joint venture reduce the investment carrying value. When the significant influence on the associate or the joint venture is lost, the Bank measures and recognizes any residual investment that remained at its fair value. The difference between the associate or joint venture carrying value (taking into account the relevant items of other comprehensive income), the fair value of the retained residual investment and any proceeds from disposing of a part interest in the associate or joint venture, is recognized in the of income. The currency translation adjustments recognized in equity are reclassified to net income at the moment of disposal. For further informacion please see note 7. 4. Joint operations A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement have rights to the assets, and obligations for the liabilities, relating to the arrangement. The Bank recognizes and measures assets, liabilities, revenues and expenses in relation to its interest in joint operations in accordance with the applicable IFRS for the particular assets, liabilities, revenues and expenses. If the Bank acquires an interest in a joint operation in which the activity constitutes a business, as defined in IFRS 3 Business Combinations or when an existing business is contributed to the joint operation on its formation by one of the parties that participate in the joint operation, the Bank will apply all of the principles of IFRS 3 Business Combinations. In this case the Bank recognizes goodwill in the event that consideration transferred exceeds the net of the acquisition date amounts of the identifiable assets acquired and the liabilities assumed. Goodwill is tested for impairment at least annually. When the Bank transacts with a joint operation in which the Parent Company or its subsidiaries is a joint operator (such as a sale or contribution of assets), the Bank is considered to be conducting the transaction with the other parties to the joint operation, and gains and losses resulting from the transactions are recognized in the Bank’s consolidated financial statements only to the extent of other parties’ interests in the joint operation. When the Bank transacts with a joint operation in which the Parent Company or its subsidiaries is a joint operator (such as a purchase of assets), the Bank does not recognize its share of the gains and losses until it resells those assets to a third party. 5. Funds administration The Bank manages assets held in mutual funds and other forms of investment. Assets managed by the Bank’s subsidiaries and owned by third parties are not included in the consolidated financial statements unless control exists as structured entities. The Bank consolidates the following funds: Name Country % of ownership interest held by the Bank, 2018 % of ownership interest held by the Bank, 2017 % of ownership interest held by the Bank, 2016 Assets managed December 2018 December 2017 FCP Fondo Colombia Inmobiliario Colombia 51.29% 63.47% 62.55% 3,205,133 2,698,224 Fideicomiso “lote Abelardo Castro” Colombia 67.39% 68.23% 68.23% 11,616 10,343 Suvalor Panamá Fondo de Inversión Panamá 100.00% 100.00% 100.00% 244 224 Fondo de Inversión en Arrendamiento Operativo Renting Perú Perú - 100.00% 100.00% - - For all the aforementioned funds, the Bank has participated in the design of the structured entity, establishes operating and financial decisions of the funds and it is exposed to variable returns such as dividends or returns paid in quarterly installments. The commissions earned by the management of funds that are not consolidated are included in the statement of income as “Fees and commissions income”. 6. Non-controlling interest Non-controlling interests in the net assets of consolidated subsidiaries are presented separately within the Bank’s equity. Similarly, net income and other comprehensive income are also attributed to non-controlling interest and equity holders of the Parent Company. The amount of non-controlling interest may be initially measured either at fair value or at the non-controlling interest’s proportionate share of the acquiree’s identifiable net assets. The option for recognition is made on an investment by investment basis. Any purchase or sale of shares in subsidiaries that does not imply a loss or gain of control is directly recognized in equity. 6.1. Significant non-controlling interest FCP Colombia Inmobiliario As of December 31, 2018, and 2017, the portion of non-controlling interest in the FCP Colombia Inmobiliario was 48,71% and 36,53%, respectively, which is considered as a significant non-controlling interest for the Bank and its subsidiaries. The principal place of business of FCP Colombia Inmobiliario is Bogotá (Colombia). As of December 31, 2018, and 2017, there were no dividends declared by this subsidiary. In contrast, there were returns paid in quarterly installments due to the nature of its business, which mainly comprises long- term investment in real state, considered as low-risk portfolio. The following table summarizes the assets, liabilities, net assets, net income and cash flows as of December 31, 2018, 2017 and 2016, related to the FCP Colombia Inmobiliario: December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Assets 3,205,133 2,698,224 2,009,382 Liabilities 963,841 1,048,867 655,315 Net assets 2,241,292 1,649,357 1,354,067 Condensed statement of income Income Valuation of investment properties 70,933 81,816 52,543 Valuation of trust rights 29,161 53,143 12,903 Rents 147,324 135,135 120,811 Profits of equity method investees 96,201 144,146 - Other income 6,940 4,493 2,616 Total Income 350,559 418,733 188,873 Expenses Interest on loans 67,593 68,900 67,558 Trust fees 554 322 9,004 Other expenses 121,162 86,270 49,078 Total Expenses 189,309 155,492 125,640 Net Income 161,250 263,241 63,233 Condensed cash flow Net cash (used in) provided by operating activities (351) (394) (372) Net cash (used in) provided by investing activities - - - Net cash (used in) provided by financing activities 334 409 375 Cash and cash equivalents at beginning of year 18 3 - Cash and cash equivalents at end of year 1 18 3 The information above are the amounts before inter-company eliminations. As of December 31, 2018, 2017 and 2016, the profit allocated to non-controlling interest amounted to COP 78,570, COP 96,179 and COP 23,701, respectively. As of December 31, 2018, 2017 and 2016, the accumulated non-controlling interest of the FCP Colombia Inmobiliario amounted to COP 1,091,802, COP 602,548 and COP 507,115, respectively. Grupo Agromercantil Holding S.A. As of December 30, 2018, the portion of ownership in Grupo Agromercantil Holding by the non-controlling interest was 40.00%, which is considered as a significant non-controlling interest for the Bank and its subsidiaries. Guatemala is the principal place of business of GAH and its subsidiaries. The following table summarizes the assets, liabilities, net assets, net income and cash flows as of December 31, 2018, 2017 and 2016 of GAH. December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Assets 13,556,250 12,191,869 11,795,358 Liabilities 12,209,984 10,847,895 10,477,427 Equity 1,346,266 1,343,974 1,317,931 Condensed statement of income Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off-balance sheet credit instruments 388,932 389,463 393,972 Total fees and commission, net 111,932 101,565 58,745 Other operating income 52,286 54,246 55,942 Dividends received and equity method 579 608 779 Total operating income, net 553,729 545,882 509,438 Operating expenses (458,277) (445,038) (435,430) Income tax (15,910) (21,546) (11,197) Net income 79,542 79,298 62,811 Condensed cash flow Net cash (used in) provided by operating activities (66,235) 192,850 (136,878) Net cash (used in) provided by investing activities 244,949 (1,427) (4,157) Net cash (used in) provided by financing activities (2,983) (87,103) (77,684) Cash and cash equivalents at beginning of year 1,324,893 1,098,861 1,359,176 Cash and cash equivalents at end of year 1,500,624 1,203,181 1,140,457 Other comprehensive income Investments at fair value through OCI (6,598) 2,241 3,682 Translation adjustment 43,803 15,758 (64,195) Others (3,922) (3,042) 6,959 Total other comprehensive income 33,283 14,957 (53,554) For the year 2018, 2017 and 2016, the dividends received from Grupo Agromercantil amounted to COP 50,341, COP 39,482 and COP 46,416, respectively.
Functional and presentation currency	1. Functional and presentation currency Items included in the financial statements of each of the Bank’s entities are measured using the currency of the primary economic environment in which the entity operates (‘the functional currency’). The consolidated financial statements are presented in Colombian pesos, which is the functional currency for the Parent Company, and the presentation currency for the consolidated financial statements. All transactions and balances in other currency than pesos are considered as foreign currency.
Transactions and balances in foreign currency	2. Transactions and balances in foreign currency Foreign currency transactions are translated into the functional currency using the exchange rates at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities denominated in foreign currencies at period end exchange rates are generally recognized in net income. They are deferred in equity if they relate to qualifying cash flow hedges and qualifying net investment hedges or are attributable to part of the net investment in a foreign operation. Non-monetary items that are measured at cost are held at the exchange rate at the transaction date, while those which are measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value was determined. When a gain or loss on a non-monetary item is recognized in Stament of other comprehensive income, any exchange component of that gain or loss is recognized in other comprehensive income. Conversely, when a gain or loss on a non-monetary item is recognized in net income, any exchange component of that gain or loss shall be recognized in net income.
Foreign subsidiaries	3. Foreign subsidiaries The results and financial position of foreign operations (none of which has the currency of a hyperinflationary economy) that have a functional currency different from the Bank´s presentation currency are translated into the presentation currency as follows:  Assets and liabilities for each statement of financial position presented are translated at the closing rate at the date of that statement of financial position  Income and expenses for each statement of income and statement of other comprehensive income are translated at average exchange rates, and  All resulting exchange differences are recognized in other comprehensive income in Translation adjustment reserve. As part of the consolidation process, exchange differences arising from debt securities in issue and the portion of other financial securities designated as hedges of foreign operations that are determined to be an effective hedge, are recognized in other comprehensive income in Translation adjustment reserve. When a foreign operation is sold or any debt securities in issue forming part of the net investment are repaid, the associated exchange differences are reclassified to net income, as part of the gain or loss on sale. Goodwill and fair value adjustments arising on the acquisition of a foreign operation are treated as assets and liabilities of the foreign operation and translated at the closing exchange rate. The table below sets forth the exchange rate used by the Bank and its subsidiaries to convert statement of financial position accounts and transactions in U.S. dollar into Colombian pesos: December 31, 2018 December 31, 2017 December 31, 2016 Closing exchange rate 3,249.75 2,984.00 3,000.71 Average rate for the period ended at 2,956.55 2,951.21 3,053.20
Cash and cash equivalents	4. Cash and cash equivalents The Bank considers cash and cash equivalents to include cash and balances at central bank, interbank assets and reverse repurchase agreements and other similar secured lending that have original maturities up to 90 days, as shown in Note 4.
Security deposits.	5. Security deposits. Security deposits are assets pledged as collateral that correspond to cash guarantees made by the Bank to other financial institutions. The carrying amount is increased when a margin call is issued or when it is necessary to increase the trading quota; conversely, it is decreased when the aim is to lower that quota. The security deposits are recognized as other assets in the consolidated statement of financial position at the amount paid in favor of the counterpart and these assets are not subject to interest recognition.
Business combinations and goodwill	6. Business combinations and goodwill Business combinations are those transactions where an acquirer obtains control of a business (e.g. an acquisition or merger). Business combinations are accounted for using the acquisition method as follows: a) Identifiable acquired assets, liabilities and contingent liabilities assumed in the acquisition are recognized at fair value at the date of acquisition; b) Acquisition costs are recognized in the consolidated statement of income as expenses in the periods in which the costs are incurred and the services are received; c) and goodwill is recognized as an asset in the consolidated statement of financial position or a gain from a bargain purchase. The consideration transferred for the acquisition of a subsidiary is the fair value of the assets transferred, the liabilities incurred to the former owners of the acquiree and the equity interests issued by the Bank (If any). Goodwill is measured as the excess of the sum of the consideration transferred, the value of any non-controlled interest and, when applicable, the fair value of any previous equity interest in the acquiree, over the net fair value of the acquired assets, liabilities or contingent liabilities assumed at the date of acquisition. For each business combination, at the date of acquisition, the Bank measures the non-controlling interest by the proportional share of the identifiable assets acquired, as well as liabilities and contingent liabilities assumed by the acquired company, or by their fair value. Any contingent consideration in a business combination is classified as a liability or as equity and is recognized at fair value at the date of acquisition, the liability is remeasured at subsequent reporting dates in accordance with IAS 37, Provisions, Contingent Liabilities and Contingent Assets, and the consideration classified as equity is not remeasured at subsequent reporting dates and its subsequent settlement is accounted for within equity. The goodwill acquired in a business combination is allocated, at the date of acquisition, to the Bank's cash-generating units (or group of cash generating units) which are expected to benefit from the combination, regardless of whether other assets or liabilities of the acquiree are assigned to those units or group of units. For business combinations achieved in stages, any previous equity interest held by the Bank in the acquiree is remeasured at its fair value at the date of acquisition and any resulting gain (or loss) is reported in the consolidated statement of income or other comprehensive income, as appropriate. Amounts previously recognized in other comprehensive income that must be recycle through net income in relation with such investments are reclassified to the consolidated statement of income, as if such investment had been sold. When the associate has other comprehensive income, which is not reclassified to profit or loss, the amounts are not reclassified when the investment is sold. When the Bank enters into an option contract to acquire totally or partially the amount of shares in a subsidiary held by non-controlling interest, that entitles the non-controlling interest to sell its interest in the subsidiary to the Bank put option, the Bank analyzes whether the ownership risks and rewards remain with the non-controlling interest or have been transferred to the Bank. The non-controlling interest is recognized to the extent the risks and rewards of ownership of those shares remain with them. Irrespective of whether the non-controlling interest is recognized, a financial liability is recorded for the present value of the redemption amount. Subsequent changes to the liability are recognized in net income. The Bank will reclassify the liability to equity if the put option expires unexercised.
Financial instruments	7. Financial instruments A financial instrument is a contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity. 7.1. Recognition of financial assets and liabilities Financial assets and liabilities are recognized in the statement of financial position when the Bank becomes party to the contractual provisions of the instrument. This includes regular way purchases and sales, which are those purchases and sales of financial assets that require the delivery of assets within the time frame established by regulation or convention in the marketplace. The Bank uses settlement date accounting for regular way contracts when recording financial asset transactions. 7.2. Offsetting of financial instruments Financial assets and financial liabilities are reported on a net basis on the statement of financial position if and only if (i) there is currently a legally enforceable right to set off the recognized amounts and (ii) there is intention to settle on a net basis, or to realize the asset and settle the liability simultaneously. The Bank does not offset income and expenses, unless required or permitted by an IFRS. 7.3. Fair value The fair value of all financial assets and liabilities is determined at the statement of financial position date, for recognition or disclosure in the notes to the financial statements. To determine fair value, characteristics of the asset or liability are taken into account in the same way that market participants would use when pricing the asset or liability at the measurement date: Based on quoted prices (unadjusted) in active markets for identical assets or liabilities to which the Bank can access at the measurement date (level 1).  Based on inputs of valuation methodologies commonly used by the market participants, these inputs are other than quoted prices included with in level 1 that are observable for the assets or liabilities, either directly or indirectly; considering inputs as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities like interest rates and yield curves observable at commonly quoted intervals, implied volatilities and credit spreads, and market-corroborated inputs (level 2).  Based on internal valuation techniques of discounted cash flow and other valuation methodologies, using unobservable inputs estimated by the Bank for the assets or liabilities, in the absence of observable inputs (level 3). The accounting judgments used in determining fair value relate to matters such as liquidity risk, credit risk and volatility. The changes in estimates related to these factors could affect the recognized fair value of the financial instruments. In Note 29 Fair Value of assets and liabilities an analysis is provided of the fair values of financial instruments and non-financial assets and liabilities, including further details about the measurement of fair value.
Financial assets	7.4. Financial assets At initial recognition, the Bank measures financial assets at fair value plus, in the case of a financial asset that is not measured at fair value through profit or loss, the transaction costs directly attributable to the acquisition of the financial assets. Financial assets are then classified considering their subsequent measurement at fair value through profit or loss, fair value through OCI or amortized cost on the basis of the business model for managing the financial assets and the contractual cash flow characteristics of the instrument. In addition, for particular investments in equity instruments, in accordance with IFRS 9, the Bank made the irrevocable election to present subsequent changes in fair value in other comprehensive income. 7.4.1 Money market operations. Interbank assets and interbank deposits These are funds that the Bank lends to other financial institutions or borrows from the Central Bank and other financial institutions. The transactions in an asset position with maturity of up to ninety days are classified as cash equivalents. The operations in an asset position with maturity greater than ninety days and all the operations in a liability position are measured at amortized cost and presented as “Other assets” or “interbank deposits”, respectively. Repurchase agreements and other similar secured transactions  Asset Position Asset position refers to transactions accounted for as collateralized lending in which the Bank purchases securities with an agreement to resell them back to the seller at a stated price plus interest at a specified date, not exceeding one year. Repos in asset position are initially recognized at the consideration paid and they are subsequently measured at amortized cost. The difference between the purchase value and resale price is recorded in net interest income and accrued over the life of the agreement using the effective interest rate method.  Liability Position Liability position refers to transactions accounted for as collateralized borrowing in which the Bank sells debt securities with an agreement to repurchase them back from the buyer at a stated price plus interest at a specified date, not exceeding one year. The securities sold under those agreements are not derecognized from the statement of financial position when the Bank substantially retains all of the risks and rewards of the securities. However, the securities are disclosed as pledged assets. The amounts received are initially recognized, at fair value, as a financial liability and subsequently measured at amortized cost. The difference between the sale value and the repurchase value is treated as interest expense and accrued over the life of the agreement by the effective interest rate method. 7.4.2 Debt and equity securities Securities at amortized cost Debt securities are classified at amortized cost only if the asset is maintained within a business model whose objective is to hold it in order to collect contractual cash flows and the contractual terms of the security give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding; Its interest income is recognized using the effective interest rate method. The effective interest method is a method used to calculate the amortized cost of an asset and to assign the income or cost in interest during the relevant period. The effective interest rate is the discount rate at which the present value of future estimated cash payments or those received through the expected life of the financial instrument, or, when appropriate, in a shorter time frame, are equal to the net carrying value at the beginning. To calculate the effective interest rate, the Bank estimates cash flows considering all the contractual terms of the financial instrument, including transaction costs and premiums granted minus commissions and discounts, but without considering future credit losses. Securities at fair value through profit or loss These are equity securities and debt securities that are not subsequently measured at amortized cost or at fair value through other comprehensive income. The difference between the current fair value and the immediately preceding fair value of the respective security is recorded as a higher or lower value of the asset, affecting the statement of income. Investments at fair value through other comprehensive income (applicable since January 1, 2018) Investments in debt securities are classified as measured at fair value through other comprehensive income if they are maintained under a business model whose objective is achieved by both obtaining the contractual cash flows and selling the instruments and, in addition, the instruments give rise, on specific dates to cash flows that correspond only to payments of capital and interest on the principal amount outstanding. Changes in fair value of the investment are recognize in other comprehensive income, except for impairment gains or losses, interest income and foreign exchange gains or losses which are recognized in profit or loss. When the financial asset is written off, the accumulated gain or loss previously recognized in other comprehensive income is reclassified from equity to the statement of income. Interest income from these financial assets is recognized in the statement of income as ‘ Interest and valuation on investments’ using the effective interest rate method. 7.4.3 Equity instruments at fair value through other comprehensive income The Bank has made an irrevocable election to present in other comprehensive income, subsequent changes in fair value of some equity instruments that are not held for trading; dividends from this type of instrument are recognized in net income only when the entity’s right to receive payment of the dividend is established. 7.4.4 Loans and advances to customers and financial institutions, leases and other receivables These are financial assets that consist primarily of corporate loans, personal loans (including mainly consumer finance and overdrafts), residential mortgage loans and financial leases. The Bank established that loans, advances to customers and other receivables are held within a business model whose objective is to hold them in order to collect contractual cash flows and the contractual terms give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding. They are initially measured at fair value, plus transaction costs and origination fees that are directly attributable to the acquisition. They are subsequently measured at amortized cost using the effective interest rate method. 7.4.5 Impairment of financial assets at amortized cost or at fair value through other comprehensive income “FVOCI” 7.4.5.1 Impairment of loans Application for the period beginning on January 1, 2018 (IFRS 9): At the end of each period, The Bank assesses impairment based on the expected loss of a financial asset or group of financial assets measured at amortized cost, or at fair value through other comprehensive income, where the impairment loss will be measured from “day 1” after its initial recognition. The model is structured in three phases in which the financial asset or group of financial assets can be categorized, from its initial recognition, considering the degree of credit risk and the circumstances that have produced a significant increase in it. Stage 1 (Initial recognition) 12-month expected credit losses Stage 2 (Significant increase in credit risk since initial recognition) Lifetime expected credit losses Stage 3 (Credit-impaired assets) Lifetime expected credit losses The expected loss is based on estimates of losses based on reasonable information about past events, present conditions and forecasts about future economic conditions. The Bank determined that the measurement of impairment of the loan portfolio and financial leasing operations can be made through a collective or individual assessment in accordance with the amount of and characteristics of the loan. Collective impairment model include parameters of probability of default at 12 months, probability of default throughout the lifetime of the obligation, loss resulting at default, and exposure at default with the inclusion of the prospective criterion. The individual analysis model is applied to significant exposures and includes the evaluation of weighted loss scenarios, taking into account macroeconomic expectations and the particular conditions of each debtor for the future generation of cash flow. Significant Increase in Risk To establish whether an asset presents a significant increase in risk since the initial recognition, the Bank performs an evaluation of quantitative and qualitative factors and reviews for each portfolio the rebuttable presumption that more than 30 days past due. The way in which the Bank determines whether the credit risk of financial instruments has increased significantly since the initial recognition is as follows: Quantitative Criteria Lifetime PD assessment: the Bank has determined that the most suitable quantitative way to establish the significant increase in credit risk is by assessing the residual lifetime PD at the initial recognition and at the current lifetime PD. In order to measure this difference, two thresholds are defined:  Absolute Threshold: is the absolute difference between the value of the residual lifetime PD at the initial recognition and at the current lifetime PD. This threshold determines the value from which a positive absolute variation identifies a significant increase in the risk of the instrument.  Relative Threshold: is the percentage variation between the value of the residual lifetime PD at the initial recognition and at the current lifetime PD. This threshold determines the value from which a positive percentage variation identifies a significant increase in the risk of the instrument. If as a result of comparison of PDs one threshold but not the other is exceeded, it is not considered that there is a significant increase in the risk for the instrument. If the instrument does not exceed the threshold, other qualitative criteria are evaluated, which can identify a significant increase credit risk even when the obligation is very close to expiration, the qualitative criteria are the following: Qualitative Criteria  Clients with assets restructured by risk, where the client is experiencing financial difficulties are classified in Stage 2 and provisioned by lifetime expected credit loss until the instrument is canceled or it is transfer to Stage 3 because it fullfill with definition of default.  Clients on the watch list with level 2 or medium risk level.  The Bank additionally reviews each semester if there are collective criteria for the migration of a group of clients to stage 2, for example, if a significant change has occurred from the origin in a specific product or geographic region or the occurrence of industry, regulatory, market or any other events that are considered significant with respect to their impact on the generation of future cash flow of the clients group operation. Refutable presumption of more than 30 days of default The Bank has reviewed for each portfolio the presumption of a significant increase as a result of 30 days past due, and finds historical evidence that there is a relationship between this presumption and default, except for Banistmo's mortgage portfolio, where the Bank has rebutted the presumption. The basis for rebutting this presumption is that there is reasonable and sustainable information that shows that when the contractual payments are more than 30 days past due, this does not represent a significant increase in the credit risk of a financial instrument, the main ones causes are:  A percentage of Banistmos mortgage portfolio is 31-60 delinquency for operational issues due to the collection of checks (which generate a high operational burden), so that the payment culture exceeds 30 days past due. In accordance with IFRS 9.B5.5.20, when a non-payment effects results from an administrative oversight, instead of a financial difficulty of the borrowers, it is possible to rebut this presumption.  There is no relationship between mortgages whose payments are past due for more than 30 days past due and the default, since only 15% deteriorate, but ia relationship is evidenced when the payments are more than 60 days past due, in which case approximately 74% is deteriorated. In accordance with the previous paragraph, the significant increase credit risk for Banistmo's mortgage portfolio is defined at 60 days past due. The following table show the participation for each of the stages and the distribution of stage 2 is detailed for the reasons that represent the significant increase credit risk. Portfolio Stage 1 Stage 2 Stage Threshold Watch List Restructured More Than Total Commercial 89.2% 29.5% 61.4% 3.6% 5.5% 3.1% 7.7% Consumer 88.9% 67.4% 0.8% 9.7% 22.1% 5.9% 5.3% Mortgage 88.2% 65.5% 0.0% 11.3% 23.1%* 7.2% 4.7% Total Portfolio 89.0% 48.1% 30.7% 7.1% 14.1% 4.2% 6.8% * The significant increase credit risk for Banistmo's mortgage portfolio is 60 days past due. Definition of Default To establish whether an asset is default, the Bank performs an assessment of quantitative and qualitative factors and reviews for each portfolio the rebuttable presumption of more than 90 days of default. The way in which the Bank determines if there is a default is the following: Quantitative criteria:  Clients in default category according to internal rating models, because they have a high probability of default and high risk.  Any Client that present a written off loan on their portfolio. Qualitative Criteria:  Clients in special states of restructuring or business reorganization and insolvency agreements.  Clients on the observation list with high risk level.  The Bank additionally, aligns all the loans of the same modality of the client to stage 3 when one of its obligations is in default. Refutable presumption of more than 90 days of default The Bank has reviewed for each portfolio the presumption loss in 90 days past due, and finds historical evidence of high probability of loss in the 90 days, except for Banistmo's mortgage portfolio, where the Bank has rebutted the presumption, given that there is historical evidence that the loss occurs at 180 days past due through the analysis of transition matrices, therefore the default for this portfolio is given at 180 days past due. Measurement of expected credit losses by Collective methodology: The quantification of the expected credit losses collectively is done according to: the classification of the stages, the homogeneous groups defined in each type of portfolio and the client’s risk level. The segmentation of homogeneous groups is carried out by type of client; for individuals it is grouped by products and for companies by industry segments based on the sales level of the client. Similarly, the risk level is assigned by type of client; for individuals the risk is measured using a behavioral scoring model for consumer products and a behavioral scoring for housing products. The function of these models is to rank the clients according to risk and thus have a better follow-up with them, the scoring is based on historical behavior and variables associated with each one of the products. For companies, the level of risk is measured based on an internal rating model, which uses qualitative and quantitative variables as financial indicators of the client and then rankes them on a scale of 10 levels. The rating is affected by qualification programs of the region, factors of the local market and the knowledge of the client in the market, in addition to their financial state. For further details please see Note 31 Risk Management, section: Description of Loans and Financial Leases. To estimate the expected credit losses (ECL) under the collective methodology the following formula is used: ECL = Probability of Default * Loss Given Default * Esposure At Default The factors are estimated using statistical models developed from internal historical information of the entity and then adjusted with forward-looking information as described below:  Probability of Default (PD): Is the sstimated probability of occurrence of a default of an instrument. IFRS 9 proposes the specification of this parameter and its application according to the classification of Stages 1, 2 and 3. o PD 12 months: Is the estimated probability of occurrence of a default in the next 12 months of the instrument’s life as of the date of analysis. The Bank, according to the standard, estimated this probability for healthy portfolios that do not present a significant increase in risk or any evidence of impairment, that is, portfolios classified in Stage 1. To estimate the probability of default in the next 12 months, the Bank uses traditional techniques such as logistic regression, modeling the behavior of the portfolio by level of risk for each of the segments. o Lifetime PD: Is the estimated probability of occurrence of a default over the remaining life of an instrument, being dependent on the conditions of the product and the level of risk. The Bank estimated this probability for the portfolio with a significant increase in credit risk, that is, classified in Stage 2. The Bank estimates this probability using survival models which employ a statistical analysis to quantify the survival rate of a portfolio for a given period. o PD Stage 3: The clients evaluated by the collective methodology in Stage 3 have an associated probability of default of 100%.  Loss Given Default (LGD) or severity:Is the percentage of exposure that the entity ultimately expects to lose in the event of a default in a financial instrument. The general formulation for the calculation of the LGD is = 1- Recovery Percentage, where the Recovery Ppercentage refers to the sum of the flows received from the transaction discounted at the rate for the client on the date of analysis on the total of the exposure at the time of default, including contractual debt sales and other recovery strategy. For secured products, this is primarily based on collateral type and projected collateral values, historical discounts to market/book values due to forced sales, time to repossession and recovery costs observed.  Exposure at default: Is the exposed value of the asset valued at amortized cost (includes the balance of capital, interest and accounts receivable), based on the contractual repayments owed by the borrower over a 12 months or lifetime basis, depending on the Stage of the asset. For revolving products and those with an available quota that is likely to be used in its entirety, the Exposure At Default (EAD) estimate considers the use of the CCF (risk conversion factor), in order to find a relationship corresponding to the used and unused component of the instrument. To estimate the expected credit losses (ECL) of guarantees and loan commitments it's considered in the formula an additional component of probability of becoming loan portfolio. In order to estimate Lifetime Expected Credit Loss, the exposed balance is projected annually, the discount of the flows is made at the effective interest rate or an approximation of it. Forward-looking information incorporated in the ECL models To incorporate the Prospective information to the factors defined for the estimation of the expected loss, The Bank uses methodologies that correlate the historical behavior of the portfolio with certain economic variables. The Bank has made the projection of three macro scenarios (base, pessimistic and optimistic); each scenario has a plausible probability of occurrence to evaluate the best estimate of the expected loss under possible future economic conditions. To make the projections, the Corporate Economic Research team has defined a process for the generation of estimates under two perspectives: thematic and analytical. Thematic Perspective: in the first instance, a series of external variables are defined, which are those whose values are established at a global level and in whose definition the idiosyncratic dynamics of the analyzed country are not considered. As these are issues whose detailed study is beyond the scope of this team, the estimates made by external analysts are taken as reference. Analytical Perspective: includes the compilation of the historical information for the most important economic and financial variables of the country. The information bases are compiled from official sources, which mostly correspond to official authorities, such as the Superintendency or Central Bank of each country. The Bank estimates forecasts based on time series models widely used in econometrics. As a result, projections are obtained for the economic variables of interest, which are formulated monthly in a time horizon that includes the current year and five subsequent years. After five years, given the technical difficulties and the high uncertainty, the projection of the economic variables for the total remaining useful life of each instrument corresponds to the value of the fifth year projection. Given that the business cycle length has varied between 4 to 4.5 years on average in the period between 1906 and 2018, the Grupo Bancolombia’s Economic Research Division considers that it is appropriate to forecast the economic indicators for a 5 year horizon in order to capture the main dynamics of the economy. That said, beyond this horizon, any forecast of the main macroeconomic indicators should gravitate near their long term trends, or steady state of the economy Economic Scenario Weightings To recognize the uncertainty surrounding the short and medium-term economic context that the country will experience, the projection work incorporates three scenarios: base, optimistic and pessimistic. It is intended that each one of the scenarios contains reasonable expectations and that each has a relevant level of probability associated with it. In otherc| words, we seek to formulate possible, not extreme, scenarios. The projections of the base scenario correspond to the average estimate of internal analysts, while for the pessimistic scenario the observation of the 20th percentile is taken and for the optimistic scenario the 80th percentile. The base scenario comes directly from the results of the projection models developed for each indicator, this scenario has a weighting of 60%. On the other hand, both the optimistic and the pessimistic scenarios are determined based on the values of the base scenario adjusted according to the standard error of the projections (each scenario has a weighting of 20%). The following table sets forth the main macroeconomic variables that are used to incorporate the prospective information and its projections: Scenarios Macroeconomic Projections Colombia Base Scenario GDP growth Inflation Monetary Policy Rate Unemployment Exchange rate Exports Imports 2017 1.8% 4.1% 4.8% 9.6% 2,992 37,385 46,076 2018 2.6% 3.4% 4.3% 9.3% 3,060 43,035 50,140 2019 3.2% 3.4% 4.8% 8.8% 3,130 47,290 54,960 2020 3.4% 3.2% 5.3% 8.7% 3,260 46,072 59,352 2021 3.1% 3.1% 5.0% 8.6% 3,320 44,548 60,539 2022 3.3% 3.0% 4.8% 8.5% 3,370 48,213 62,658 2023 3.4% 3.0% 4.8% 8.3% 3,430 52,574 65,791 Optimistic Scenario GDP growth Inflation Monetary Policy Rate Unemployment Exchange rate Exports Imports 2017 1.8% 4.1% 4.8% 9.6% 2,992 37,385 46,076 2018 2.7% 3.1% 4.0% 9.3% 3,010 44,483 51,927 2019 3.9% 3.1% 4.3% 8.7% 3,000 49,381 57,541 2020 4.7% 2.7% 4.5% 8.4% 3,070 48,275 64,841 2021 4.3% 2.6% 4.3% 8.2% 3,090 46,630 63,825 2022 4.3% 2.6% 4.0% 8.0% 3,110 50,338 66,443 2023 4.6% 2.5% 4.0% 7.7% 3,130 54,700 69,576 Pessimistic Scenario GDP growth Inflation Monetary Policy Rate Unemployment Exchange rate Exports Imports 2017 1.8% 4.1% 4.8% 9.6% 2,992 37,385 46,076 2018 2.4% 3.7% 4.5% 9.4% 3,140 40,310 48,272 2019 2.5% 4.0% 5.3% 9.1% 3,360 41,973 52,285 2020 2.6% 3.7% 5.8% 9.0% 3,600 40,307 56,570 2021 2.1% 3.6% 5.5% 9.0% 3,740 39,946 57,905 2022 2.1% 3.6% 5.3% 9.1% 3,860 42,985 59,961 2023 2.1% 3.5% 5.3% 9.0% 3,990 47,347 63,094 Scenarios Macroeconomic Projections Panama Base Scenario GDP growth Inflation Unemployment Exports Imports Current Account Deficit 2017 5.4% 0.4% 6.0% 24,933 26,961 -8.0% 2018 3.7% 1.0% 6.5% 27,973 28,370 -5.8% 2019 5.1% 1.4% 7.2% 29,997 29,651 -4.1% 2020 4.9% 1.5% 7.5% 30,947 30,897 -4.0% 2021 4.6% 1.6% 7.9% 31,647 32,271 -3.0% 2022 4.5% 1.7% 8.2% 32,247 33,417 -3.6% 2023 4.6% 1.8% 8.5% 32,537 34,664 -3.5% Optimistic Scenario GDP growth Inflation Unemployment Exports Imports Current Account Deficit 2017 5.4% 0.4% 6.0% 24,933 26,961 -8.0% 2018 4.1% 1.0% 6.2% 28,373 28,170 -5.8% 2019 5.4% 1.3% 7.1% 30,597 28,751 -3.9% 2020 5.2% 1.5% 7.3% 31,347 29,697 -3.6% 2021 4.9% 1.6% 7.6% 32,047 31,071 -2.7% 2022 4.8% 1.6% 7.9% 32,767 32,217 -2.7% 2023 4.9% 1.6% 8.0% 33,097 33,464 -2.4% Pessimistic Scenario GDP growth Inflation Unemployment Exports Imports Current Account Deficit 2017 5.4% 0.4% 6.0% 24,933 26,961 -8.0% 2018 3.6% 1.0% 6.9% 28,197 28,370 -5.8% 2019 4.7% 1.7% 7.6% 29,197 30,851 -4.8% 2020 4.5% 1.9% 7.9% 29,647 32,097 -4.5% 2021 4.2% 1.9% 8.3% 30,047 33,471 -4.3% 2022 4.1% 2.0% 8.6% 30,147 34,617 -4.4% 2023 4.2% 2.2% 8.9% 31,737 35,864 -4.5% Scenarios Macroeconomic Projections El Salvador Base Scenario GDP growth Inflation Exports Imports Current Account Deficit Fiscal Budget Balance 2017 2.3% 2.0% 5,760 10,593 -2.0% -2.3% 2018 2.7% 1.9% 5,939 11,883 -3.3% -2.3% 2019 2.5% 1.8% 6,355 12,714 -3.4% -2.4% 2020 2.2% 1.9% 6,884 13,370 -3.5% -2.2% 2021 2.0% 1.9% 7,264 13,911 -3.6% -2.2% 2022 2.1% 1.9% 7,746 14,416 -3.5% -2.1% 2023 2.2% 2.0% 8,255 14,964 -3.4% -2.1% Optimistic Scenario GDP growth Inflation Exports Imports Current Account Deficit Fiscal Budget Balance 2017 2.3% 2.0% 5,760 10,593 -2.0% -2.3% 2018 3.2% 2.4% 5,969 11,935 -3.1% -0.8% 2019 3.6% 2.4% 6,503 12,987 -3.0% -0.9% 2020 3.5% 2.7% 7,055 13,670 -3.1% -0.8% 2021 3.2% 2.9% 7,455 14,228 -3.2% -0.8% 2022 3.4% 3.1% 7,952 14,744 -3.1% -0.8% 2023 3.5% 3.2% 8,472 15,304 -3.0% -0.8% Pessimistic Scenario GDP growth Inflation Exports Imports Current Account Deficit Fiscal Budget Balance 2017 2.3% 2.0% 5,760 10,593 -2.0% -2.3% 2018 2.3% 1.5% 5,910 11,832 -3.3% -3.5% 2019 1.8% 1.1% 6,207 12,442 -3.7% -3.8% 2020 1.4% 1.1% 6,712 13,070 -3.8% -3.6% 2021 1.1% 1.0% 7,073 13,594 -3.9% -3.5% 2022 1.3% 0.8% 7,541 14,087 -3.8% -3.4% 2023 1.4% 0.7% 8,039 14,623 -3.7% -3.5% Scenarios Macroeconomic Projections Guatemala Base Scenario GDP growth Inflation Exchange rate Exports Imports Fiscal Budget Balance 2017 2.8% 5.7% 7.34 10,983 18,389 -3.7% 2018 3.0% 4.2% 7.77 10,730 19,171 -1.7% 2019 3.3% 4.0% 7.90 10,369 18,937 -1.6% 2020 3.2% 3.7% 8.00 10,354 18,816 -1.4% 2021 3.0% 4.4% 8.09 10,769 19,399 -1.3% 2022 3.2% 4.3% 8.19 11,199 20,563 -1.2% 2023 3.3% 4.2% 8.28 11,569 21,242 -1.2% Optimistic Scenario GDP growth Inflation Exchange rate Exports Imports Fiscal Budget Balance 2017 2.8% 5.7% 7.34 10,983 18,389 -3.7% 2018 3.2% 3.7% 7.50 10,798 19,259 -1.2% 2019 4.4% 3.5% 7.52 10,656 19,290 -0.9% 2020 4.4% 2.8% 7.50 10,642 19,169 -0.8% 2021 4.4% 3.2% 7.51 11,056 19,752 -0.7% 2022 4.4% 3.4% 7.51 11,719 20,443 -0.7% 2023 4.4% 3.3% 7.53 12,235 21,343 -0.7% Pessimistic Scenario GDP growth Inflation Exchange rate Exports Imports Fiscal Budget Balance 2017 2.8% 5.7% 7.34 10,983 18,389 -3.7% 2018 2.7% 4.8% 8.03 10,662 19,083 -2.2% 2019 2.1% 4.8% 8.28 10,082 18,584 -1.9% 2020 2.0% 4.3% 8.49 10,067 18,463 -1.8% 2021 2.0% 4.7% 8.67 10,481 19,046 -1.7% 2022 2.0% 5.0% 8.86 10,901 19,999 -1.8% 2023 2.0% 4.9% 9.03 11,119 20,399 -1.8% Special methodologies applied in Stage 3 Collateral Methodology For defaulted loans (stage 3), when it is determined that the fundamental source of collection of the loan is a guarantee, the amount of the loss is estimated as the balance owed less the weighted net present value of the market value of the collateral, less the costs of obtaining and selling the collateral, and affected by several macroeconomic scenarios with an expected probability of occurrence that result in a weighted expected loss. Individual Methodology: The Bank will individually evaluate defaulted loans (stage 3) with balances greater than COP 15,000 (USD 5 for foreign subsidiaries), analyzing the debt profile of each debtor, the guarantees granted and information on the credit behavior of the client and of the sector. Significant financial assets are considered in default when, based on current or past information and events, it is probable that the Bank will not be able to recover all the amounts described in the original contract, including the interest and commissions agreed to in the contract. When a significant financial asset has been identified as being in default, the amount of the loss is measured as the balance due minus the weighted net present value of the expected future cash flows under two minimum macroeconomic scenarios with an expected probability of occurrence (base and alternative). Clients classified as individual metodology will be evaluated at least twice a year and additionally each time a relevant event occurs that is reflected in significant changes in their level of risk and that leads to a change in the scenarios previously analyzed. The relevant events can be:  Significant changes in the value of the guarantee  Expected or adverse changes in the business  Potentially shocking regulatory changes for the business  Changes in its commercial and operational dynamics  Significant payments To establish the future cash flows expected from the client, two approaches are presented, which may be via cash flow generation or via execution of some type of guarantee or liquidation of assets, that is, “Going Concern” or “Gone Concern” approach. Approach via Cash Flow: It refers to an analysis under the premise of "GOING CONCERN", that is, it is considered that the payment of the obligation will be made through the client's cash flow. The expected NPV calculation with a cash flow approach includes:  Financial projections of the client.  Debt Simulator.  Expected Net Present Value (NPV) calculation. Approach via Guarantee Recovery: It refers to the "GONE CONCERN", that is, it is considered that the payment of the obligation will be given through the execution of guarantees or liquidation of assets. The calculation of the NPV with guarantee approach should include:  Analysis of the guarantee.  Future value of the guarantee. Calculation of NPV Future cash flows are estimated based on two scenarios (base and alternative) that can be affected by the analysi of the guarantee and future value of the guarantee. Application for the period ended on December 31, 2017 (IAS 39, 2011): The Bank individually reviews impaired loans with balances greater than COP 5,000 (USD 1.5 for foreign subsidiaries), analyzing the debt profile of each debtor, the guarantees granted and information on the credit behavior in the sector. Significant financial assets are considered impaired when, based on current or past information and events, it is probable that the Bank will not be able to recover the amounts described in the original contract, including the interests and commissions agreed upon in the contract. When a significant financial asset has been identified as impaired, the amount of the loss is measured as the balance due minus the current net value of the estimated future cash flows. To estimate these flows, basic projected hypotheses are used based on qualitative analysis and backed up by information obtained from the Special Client Administration Committee as well as approvals made with Commerce Managers. When it is determined that a fundamental source of credit collection is a guarantee, the amount of loss is estimated as the balance due minus the fair value of the guarantee minus the estimated selling costs. For credits that are not considered individually significant and for the portfolio of individually significant credits that are not considered impaired, a collective evaluation is carried out. Portfolios of financial assets with similar characteristics are grouped, using statistical techniques based on the analysis of historical losses to determine an estimated percentage of losses that have been incurred by those assets on the balance date. The percentages of historical losses used in the process are updated to incorporate the most recent data of the current economic conditions, the performance trends by industry or region, or the concentration of obligations in each portfolio of financial assets by seg
Financial liabilities	7.5. Financial liabilities At initial recognition, the Bank measures its financial liabilities at fair value. The transaction costs that are directly attributable to the financial liability are deducted from its fair value if the instruments are subsequently recognized at amortized cost or will be recognized in the statement of income if the liabilities are measured at fair value. Derivative liabilities are measured at fair value through profit and loss and the gains or losses of those liabilities are recognized in the statement of income for subsequent measurements. Non-derivative financial liabilities are measured at amortized cost using the effective interest rate. Interest expenses are recognized in the statement of income unless the financial liability is designated as at fair value through profit or loss, for which is required to present the effects of changes in the liability’s credit risk in other comprehensive income. 7.5.1 Compound instruments Compound financial instruments that comprise both a liability and equity component must be separated and accounted for separately. Therefore, for initial measurement, the liability component is the fair value of a similar liability which doesn´t have an equity component (determined by discounting future cash flows using the market rate at the date of the issuance). The difference between the fair value of the liability component and the fair value of the compound financial instrument considered as a whole is the residual value assigned to the equity component. Subsequent to initial recognition, the liability component of a compound financial instrument is measured at amortized cost using the effective interest method. The equity component of a compound financial instrument is not re-measured subsequent to initial recognition. The liability component corresponds to the preferred dividend related to 1% of the subscription price, which is the payment of the minimum dividend on the preferred shares for each period in accordance with the Bank’s bylaws. 7.5.2 Financial guarantee contracts and loan commitments In order to meet the needs of its customers, the Bank issues financial standby letters of credit, bank guarantees and loan commitments. Loan commitments are those agreements under which the bank has an irrevocable obligation to grant the loan. The financial guarantee contracts issued by the Bank are contracts that require the issuer to make specified payments to reimburse the holder for a loss it incurs because a specified debtor fails to make payment when due to accordance with the original or modified terms of a debt instrument. Both financial guarantee contracts and loan commitments are initially recognized as liabilities at fair value, which is normally the fee received, adjusted for the directly attributable transaction costs incurred. Such contracts are measured at the higher of the provision amount measured according to IFRS 9 and the amount initially recognized less, the accumulated amortization recognized according IFRS 15 - Revenue from contracts with customers. Income derived from guarantees is recognized as fees and commission income in the statement of income over the term of the contract.
Derecognition of financial assets and liabilities	7.6 Derecognition of financial assets and liabilities Financial assets are derecognized when the rights to receive cash flows from the financial assets have expired or have been transferred and the Bank has transferred substantially all the risks and rewards of ownership or in which the Bank neither transfers nor retains substantially all of the risks and rewards of ownership and it does not retain control of the financial asset. On derecognition of a financial asset, the difference between: (a) the carrying amount (measured at the date of derecognition) and (b) the consideration received (including any new asset obtained less any new liability assumed) is recognized in net income. In transactions in which the Bank neither transfers nor retains substantially all the risks and rewards of ownership of a financial asset, the Bank continues to recognize the asset to the extent of its continuing involvement, determined by the extent to which it is exposed to changes in the value of the transferred financial asset. A financial liability is removed from the statement of financial position when it is extinguished, that is when the obligation is discharged, cancelled or expired. Debt exchange The Bank assesses whether the instruments subject to exchange are substantially different from each other, considering qualitative aspects such as currencies, terms, rates, conditions of subordination, regulatory framework, among others; and quantitative, in which is evaluated whether the present value of discounted cash flows under the conditions of the new instruments (including any commission paid net of any commission received) and using the original effective interest rate to calculate the discount, is at least 10 percent different from the discounted present value of the cash flows that still remain of the original financial liability. When it is concluded that the instruments subject to debt exchange are not substantially different, the transaction is recognized as a modification of the debt. In this case, incremental costs and commissions adjust the carrying amount of the liability and are amortized over the remaining life of the modified liability, in accordance with its subsequent measurement at Amortized Cost. In debt exchanges that are considered substantially different, the financial instrument is derecognized and a new financial liability is recognized. Application since January 1, 2018 When it is determined that the instruments subject to debt exchange are not substantially different, the transaction is recognized as a debt modification. In this case, the amortized cost of the modified liability is adjusted to the present value of the estimated contracts cash flows which are discounted at the original effective interest rate of the financial instrument and a gain or loss is recognized immediately in profit or loss. Incremental costs and commissions adjust the carrying amount of the liability and are amortized over the remaining life of the modified liability; its subsequent measurement continues at Amortized Cost. In debt exchanges that are considered substantially different, the liability is derecognized and a new financial liability arises. 7.6.1 Written-Off loan portfolio balances and related allowances Loans are written off when the Bank concludes there is no realistic expectation of recovery of the loans and receivables balances from a client or third party. In general, this characteristic will be fulfilled when the following delinquency conditions are present: Type Length of delinquency Consumer 180 days, 450 days for vehicles in GAH, 720 days for loans with mortgage guarantee in Banco Agricola Commercial 360 days Small Business Loan 180 days, 720 days for loans with guarantee in Banistmo Mortgage For Banistmo and Banco Agrícola from 720 days. GAH 1440 days. Among the reasons underlying a loan's non-recoverability are the estimated recovery time of the obligation and the probable recovery percentage given the existence or lack of collateral. When default conditions are present, it is initially necessary to evaluate whether the collateral that support the loan generate a reasonable expectation of recovery; if so, the necessary steps are taken to realize on the collateral prior to writing-off the loan in cases where the collateral net fair value indicates that there are no reasonable expectations of recovery, loans are written-off in the financial statements.
Derivatives financial instruments	7.7. Derivatives financial instruments A financial derivative is an instrument whose value changes in response to changes in a variable such as an interest rate, exchange rate, the price of a financial instrument, a credit rating or a credit index. This instrument requires no initial payment, or a smaller investment than would be required for other financial instruments with a similar response to changes in market conditions, and it is generally settled at a future date. The Bank carries out derivative transactions to facilitate the business of clients related to the management of their market and credit risk; managing the exposure in its own position to changes in interest rates and risks in exchange rates; or to obtain benefits from changes in valuations experienced by these instruments in the market. Derivatives are recognized and measured at fair value through profit or loss, unless such derivatives are designated as hedging instruments in cash flow hedges or as a hedge of a net investment in a foreign operation. In those cases, the effective portion of changes in the fair value of the derivatives are recognized in other comprehensive income. All derivatives are carried as assets when fair value is positive and as liabilities when fair value is negative 7.7.1 Hedge accounting Fair value hedges are used by the Bank, through its Panamanian subsidiary, Banistmo, to protect against changes in the fair value of investment securities that are attributable to interest rate variability. Cash flow hedges are used mainly to reduce the variability in cash flows caused by interest rate changes. When the hedging relationship is considered to be highly effective, the changes in value of the hedging derivatives are accounted for according to their classification as fair value hedges, cash flow hedges and hedges of net investment in foreign operations, as set in the paragraph below. The Bank assesses at the inception of the hedge and on a monthly basis during the life of the instrument, whether the hedge used in the transaction is expected to be highly effective (prospective effectiveness), and considers the actual effectiveness of the hedge on an ongoing basis (retrospective effectiveness). The Bank discontinues the hedge accounting when the hedging instrument expires or is sold, terminated or exercised, the hedge no longer meets the criteria for hedge accounting or if hedge designation is revoked. When hedge accounting for a fair value hedge is terminated the previous adjustments related to the changes in fair value of the hedged item are subsequently recorded in the consolidated statement of income in the same manner as other components of the carrying amount of that asset. Before the establishment of the hedge accounting, the Bank documents the relationship between hedged items and hedging instruments, as well as its risk management objectives and hedging strategies, which are approved by the Risk Management Committee as the body designated by the Board of Directors. Hedge relationships are classified and accounted for in the following way: – Fair value hedges: are designated to protect against the exposure to changes in the fair value of recognized assets or liabilities or unrecognized firm commitments. Changes in the fair value of derivatives that are designated and qualify as hedging instruments in fair value hedges are recorded in the statement of income as interest and valuation on investments. The change in fair value of the hedged item attributable to the hedged risk is uncluded as part of the carrying value of the hedged item, and it is also recognized in the aforementioned item of statement of income. For fair value hedges that are related to items accounted for at amortized cost, the adjustments to the carrying value are amortized through the statement of income during the remaining term until their expiry. Amortization may begin as soon as an adjustment exists and shall begin no later than when the hedged item ceases to be adjusted for changes in its fair value attributable to the risk being hedged. The adjustment is based on a recalculated effective interest rate at the date amortization begins. If the hedged item is derecognized, the non-amortized fair value is recognized immediately in the statement of income. If the hedge instrument expires or it is sold, terminated or exercised, or when the hedge no longer meets the criteria for hedge accounting, the Bank discontinues prospectively the hedge accounting. For the items hedged at amortized cost, the difference between the carrying value of the item hedged at the termination of the hedge and the nominal value are amortized using the effective rate method during the time beyond the original terms of the hedge. If the hedged item is derecognized, the remaining value to amortize is recognized immediately in the statement of income. When an unrecognized firm commitment is designated as a hedged item, the subsequent cumulative change in the fair value of the firm commitment attributable to the hedged risk is recognized as an asset or liability with corresponding gain or loss recognized in net income. – Cash flow hedges: are used mainly to manage the exposition to variability related to the cash flow attributable to a specific risk associated with an asset or liability recognized on statement of financial position or to a highly probable forecast transaction. The portion of the gain or loss on the hedging instrument that is determined to be an effective hedge is recognized in other comprehensive income. The ineffective portion of the gain or loss on the hedging instrument is recognized in the statement of income. If the hedging instrument expires or is sold, terminated or exercised, without replacement or rollover into another hedging instrument, or if its hedging designation is revoked, any accumulated gain or loss previously recognized in OCI remains in OCI, until the planned operation or the firm commitment affects Hedge accounting is discontinued when the Bank revokes the hedging relationship, when the hedging instrument expires or is sold, terminated, or exercised, or when no longer qualifies for hedge accounting. Any gain or loss recognized in other comprehensive income and accumulated in equity at that time remains in equity and is recognized in other comprehensive income when the forecast transaction is ultimately recognized in net income. When a forecast transaction is no longer expected to occur, the gain or loss accumulated in equity is recognized immediately in net income. – Hedges of a net investment in a foreign operation: In accordance with IAS 39 ‘Financial instruments’ and IFRIC 16 ‘Hedges of a net investment in a foreign operation’, the Bank has decided to apply the hedge accounting of the foreign currency risk arising from its net investment in Banistmo, designating as a hedging instrument of certain debt securities issued by the Parent Company. Considering the hedge accounting relationship, in the case of the net investment, the gain or loss derived from the foreign exchange differences related to the debt securities that is determined to be an effective hedge is recognized in other comprehensive income, as is the currency translation adjustment of the Banistmo operation into the presentation currency as required by IAS 21 as detailed in F.2. ‘Functional and presentation currency’.
Premises and equipment	8. Premises and equipment Premises and equipment include tangible items that are held for use, for rental to others, or for administrative purposes and are expected to be used for more than one period. Items of premises and equipment are expressed at cost less accumulated depreciation and impairment losses. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. The depreciable amount is the cost of an asset less its residual value. The estimated useful lives for each asset group are: Asset group Useful life range Buildings 10 to 75 years Furniture and fixtures 5 to 20 years Computer equipment 3 to 20 years Equipment and machinery 3 to 40 years Vehicles 3 to 6 years The assets’ residual values and useful lives are reviewed, and adjusted if appropriate, at the end of each reporting period. When there is a significant change, the depreciation and the charge to the statement of income are adjusted based on the new estimation. The Bank assess at the end of each year whether there is any indication of external or internal reduction in the asset’s recoverable value. Assets classified as premises and equipment are subject to impairment tests when events or circumstances occur indicating that the carrying amount of the assets may not be recoverable If there is any indication of impairment, the Bank estimates the recoverable amount of the assets and then recognizes the impairment loss in the consolidated statement of income. An impairment loss is recognized for the amount by which the asset’s carrying amount exceeds its recoverable amount and is recognized in the statement of income as ‘impairment, depreciation and amortization’. When the carrying value exceeds the recoverable value, the carrying value is adjusted to its recoverable value, modifying the future charges for depreciation, according to its new remaining useful life. In a similar way, when indications exist that the value of an asset has been recovered, reversal of an impairment loss is recognized immediately in net income and consequently the future charges for the asset’s depreciation are adjusted. In any case, the reversal of the impairment loss of assets cannot increase its carrying value above the amount that it would have if impairment losses in previous periods had not been recognized. For the purposes of assessing impairment, assets are grouped at the smallest identifiable group that generates cash inflows that are largely independent of the cash inflows from other assets or groups of assets (cash-generating units). The evaluation can be carried out at individual asset level when the fair value less the cost of sale can be reliably determined and the value in use is estimated to be close to its fair value less costs to sell and fair value less costs to sell can be determined Maintenance expenses of the premises and equipment are recognized as an expense in the period in which they are incurred and are registered in the consolidated statement of income as administrative and general expenses. Gains and losses in the sale of premises and equipment are registered in the consolidated statement of income as other operating income or other expenses.
Investment properties	9. Investment properties Land and buildings that the Bank holds to earn rentals or for capital appreciation or both rather than for their use in the supply of services or sale in the ordinary course of business are recognized as investment properties. The investment properties are measured initially at cost, including the transaction costs. The carrying value includes the cost of replacement or substitution of a part of an investment property at the time the cost is incurred, if the cost meets the recognition criteria; and it excludes the daily maintenance costs of the investment property which are included in the statement of income as “Other expenses”. After the initial recognition, the investment properties are measured at fair value which reflects the market conditions at the statement of financial position date. The gains and losses that arise from changes in the fair values of investment properties are included in the statement of income as ‘Other operating income’. The investment properties are derecognized, either at the moment of their disposal or when they are permanently withdrawn from use and no future economic benefits are expected. The difference between the net disposal proceeds of the investment properties and the carrying value is recognized in net income in the period the disposal occurs. Transfers of an asset to or from the investment properties are only made when there is a change in its use. For a transfer from an investment property to premises and equipment, the cost taken into account for its subsequent accounting is the fair value at the time of the change in use. If a premise and equipment becomes an investment property, it will be accounted for at its fair value.
Intangible assets	10. Intangible assets An intangible asset is an identifiable non-monetary asset with no physical appearance. Separately acquired intangible assets are measured initially at their cost. The cost of intangible assets acquired in business combinations is their fair value at the date of acquisition. After the initial recognition, the intangible assets are accounted for at cost less any accumulated amortization and any accumulated impairment loss. The costs of internally generated intangible assets, excluding the costs from development that meet the recognition criteria, are not capitalized and the expense is reflected in the statement of income as it is incurred. The useful lives of intangible assets are determined as finite or indefinite. The intangible assets with finite useful lives are amortized using the straight-line method over their estimated useful lives. The amortization period and the amortization method for intangible assets with a finite useful life are reviewed at least at the close of each period. The expected changes in the useful life or in the pattern of consumption of the future economic benefits of the asset are accounted for when changing the period or amortization method, as appropriate, and they are treated as changes in the accounting estimates. The amortization expense of intangible assets with finite useful lives is recognized in the statement of income. The useful lives of the intangible assets with finite life ranges between 1 and 10 years. The Bank assesses annually its intangible assets with finite life in order to identify whether any indications of impairment exist, as well as possible reversal of previous impairment losses. Intangible assets with indefinite useful lives are not subject to amortization, but are periodically tested in order to identify any impairment, either individually or at the cash-generating unit level. The assessment of the indefinite life is reviewed annually to determine if it continues being valid. In the event that the assessment were not valid, the change from indefinite useful life to finite useful life is recognized prospectively. The gain or loss that arises when an intangible asset is derecognized are measured as the difference between the disposal value and the carrying value of the asset and is recognized in the statement of income. The Bank’s intangible assets comprise mainly intangibles of finite useful life: licenses, software and computer applications, client relationships and the legal stability agreement signed with the Ministry of Finance and Public Credit (See note 11 Income tax), customer relationships and patents. Intangibles of indefinite useful life are include in Goodwill. 10.1 Research and development costs The research costs are recorded as expenses as they are incurred. Costs directly related to the development of a stand-alone project are recognized as intangible assets when the following criteria are met:  It is technically feasible of to complete the intangible asset so that it will be available for use or sale;  Management intends to complete the intangible asset and use or sell it;  There is an ability to use or sell the intangible asset;  It can be demonstrated how the asset will generate probable future economic benefits;  Adequate technical, financial and other resources to complete the development and to use or sell the intangible asset are available; and  The expenditure attributable to the intangible asset during its development can be reliably measured. In the statement of financial position, the related capitalized costs are recorded at cost less accumulated depreciation and accumulated impairment losses. Costs are capitalized during the application development stage and amortized on a straight-line basis from the beginning of the production stage over the period of expected future economic benefits. During the development period, the asset is subjected to impairment testing at least annually to determine if impairment indications exists. The development costs that do not qualify for capitalization are recorded as expenses in the income of the period. (see “Impairment of non-financial assets and cash-generating units and goodwill”).
Inventories	11. Inventories The inventories of returned property are those assets that come from an early termination of a lease (returned properties) or those upon which the lease has already concluded (premises and equipment), which are expected to be sold in the normal course of business. These are controlled by the Bank and are expected to generate future economic benefits. The inventories of returned property are recognized as an asset from the date in which the Bank assumes the risks and benefits of the inventories, provided that the cost of the asset can be reliably measured, and it is probable that it will generate future economic benefits. The inventories of returned property are valued using the specific identification method and their costs include the carrying value at the time the asset is returned. The carrying value of returned property is measured at the lower of cost and net realisable value (NRV). The net realisable value is the estimated selling price in the ordinary course of business less its estimated costs to sell. The adjustment in the carrying value to reflect the NRV, is recognized in the statement of income of the period in which the goods are returned. The value of any reversion that comes from an increase in the NRV in which the increase occurs is recognized as a lower expense in the period. Other new inventories are measured initially at acquisition cost which comprises the sum of the purchase price, the import costs (if applicable), the non-recoverable taxes paid, the storage, the transport costs, and other attributable or necessary costs for their acquisition, less discounts, reductions or similar items. Those inventories do not include selling costs. The Bank must review the NRV of its inventories, at least annually or whenever necessary by market conditions. Any write-down adjustment must be recognized directly in the statement of income.
Assets held for sale and discontinued operations	12. Assets held for sale and discontinued operations A non-current asset or a disposal group of assets are classified as held for sale if their carrying value will be recovered through a sale transaction, rather than through continuing use. These assets or groups of assets are shown separately in the statement of financial position at the lower of their carrying value and their fair value less costs to sell and they are not depreciated nor amortized from the date of their classification. The held for sale condition is met if the assets or group of assets are available, in their current condition, for immediate sale and the sale transaction is highly probable and is expected to be completed within the year following the date of classification. The Bank performs the measurement of the assets held for sale at the statement of financial position date. However, these assets are evaluated quarterly if exist impairment indicators that imply review of the carrying value recorded in the accounts. If those indications are identified, impairment losses are recognized for the difference between the carrying and recoverable amount of an asset as ‘Impairment, depreciation and amortization’ in the statement of income. Gains and losses in the sale of premises and equipment are recognized in the consolidated statement of income as “ other operating income” or “ other operating expenses”. A discontinued operation is a component of an entity that has been disposed of, or is classified as held for sale and, represents a separate major line of business or a geographical area of operations, is part of a single coordinated and individual plan to dispose of a separate major line of business or geographical area of operations or is a subsidiary acquired exclusively with a view to resale. Income and expenses coming from a discontinued operation must be disclosed separately from those coming from continued operations, in a single item after the income tax, in the consolidated statement of income of the current period and comparatively with previous period even though the Bank retains a non-controlling interest in the subsidiary after the sale.
Impairment of non-financial assets, cash-generating units and goodwill	13. Impairment of non-financial assets and cash-generating units and goodwill The Bank evaluates at the end of each period whether there is any indication that on a stand-alone basis non-financial assets and cash-generating units are impaired. If some indication of impairment does exist, the Bank estimates the recoverable amount of the assets and the loss by impairment. Regardless of whether impairment indicators exist, goodwill must be tested annually for impairment. If an asset does not generate cash flows that are independent from the rest of the assets or group of assets, the recoverable amount is determined by the cash-generating unit to which the asset belongs. A cash-generating unit is the smallest identifiable group of assets that generates cash inflows that are largely independent of the cash inflows from other assets or groups of assets. Th e amount of impairment losses recognized in net income during the period are included in the Statement of income as “Impairment, depreciation and amortization”
Other assets	14. Other assets The Bank presents as other assets, among other things, (a) the expenses paid in advance incurred in the development of its business, in order to receive future services, which are amortized during the period in which services are received or the costs or expenses are recorded and (b) foreclosed assets that do not comply with what is required to be recognized as assets held for sale and where there are no plans to use them in the supply of services or for administrative purposes. Foreclosed assets are initially recognized at the lower of net amount of the charged-off financial assets to which the foreclosed and net realizable value of the foreclosed asset (the net realizable value will be the estimated selling price of the asset or its awarding value, less the estimated costs necessary to carry out its sale), pending the obtaining of a plan for its commercialization. For this group of assets, it is evidence of impairment that they remain in the statement of financial position for a period greater than one year from their reception date without obtaining a buyer, despite permanently seeking their realization, even adjusting their selling price. Foreclosed assets are subsequently assessed to determine whether an impairment lost must be recognized. In the case of arising events that are beyond the control of the Bank and that make remote the realization of these assets, they are identified as "non-tradable" and a completely impairment is carried out
Employee benefits	15. Employee benefits 15.1 Short term benefits The Bank grants to its employee’s short-term benefits such as bonuses, salaries, accrued performance costs and social security that are expected to be wholly settled within 12 months. Expenses related to these benefits are recognized over the period in which the employees provide the services to which the payments relate. 15.2 Other long term employee benefits The Bank grants to its employees seniority bonuses as long-term employee benefits whose payment is not expected within the 12 months following the end of the annual period in which the employees have rendered their services. These benefits are projected up to the date of payment and are discounted through the Projected Unit Credit method. The cost of long-term employee benefits is allocated across the period from the time the employee was hired the Bank and the expected date of obtaining the benefit. 15.3 Pensions and other post-employment benefits − Defined contribution plans The Bank pays contribution monthly to pension funds, due to legal requirements and it will have no legal obligation to pay further contributions. The Bank recognizes contributions in the statement of income. Any contributions unpaid at the statement of financial position date are included as a liability. − Defined benefit plans They are post-employment benefit plans in which the Bank has the legal or constructive obligation to take responsibility for the payments of benefits that have agreed. The Bank makes an actuarial valuation on the basis of the projected unit credit method and a risk-free rate which reflects current market assessments of the time value of money in each country.
Provisions, contingent liabilities and contingent assets	16. Provisions, contingent liabilities and contingent assets Provisions are recorded when the Bank has a present obligation (legal or constructive) as a result of past events, it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation, and a reliable estimate can be made of the amount of the obligation. Provisions are determined by the management’s best estimate of the expenditure required to settle the present obligation at the end of the reporting period, which estimate is discounted using a risk-free rate which reflects current market assessments of the time value of money in each country, treasury bonds (TES) 1 1 It refers to the interest rate of treasury bonds (TES), representative of the nation's public debt. The amounts recognized in the statement of income, correspond mainly to: − Provisions for loan commitments and financial guarantee contracts; and − Provisions for legal proceedings, classified as probable to be decided against the Bank. Possible obligations that arise from past events and whose existence will be confirmed only by the occurrence or non-occurrence of one or more uncertain future events, not wholly within the control of the Bank, or a present obligation that arise from past events but are not recognized because it is not probable, that an outflow of resources embodying economic benefits will be required to settle the obligations or the amount of the obligations cannot be measured with sufficient reliability, are not recognized in the financial statement but instead are disclosed as contingent liabilities, unless the possibility of an outflow of resources embodying economic benefits is remote, in which case no disclosure is required. Possible assets that arise from past events whose existence will be confirmed only by the occurrence or non-occurrence of one or more uncertain future events, not wholly within the control of the Bank, are not recognized in the financial statement; instead are disclosed as contingent assets where an inflow of economic benefits is probable. When the realization of income is virtually certain, then the related asset is not a contingent asset and its recognition is appropriate.
Customer loyalty program	17. Customer loyalty program The Bank maintains a credit card loyalty program to provide incentives to its customers. The program allows customers to purchase goods and services, based on the exchange of awards points, which are awarded based on purchases using the Bank's credit cards and the fulfillment of certain conditions established in such program. Point’s redemption for prizes is carried out by a third party. According to IFRS 15, the expenses of the Bank's commitments with its clients arising from this program are recognized as a lower value of the fees and commission income, considering the total number of points that can be redeemed over the accumulated prizes and taking into account the probability of redemptions.
Revenue recognition	18. Revenue recognition Policy applicable since of January 1, 2018 Bank recognizes revenue from ordinary activities, which represent the transfer of goods or services committed with customers in exchange for an amount that reflects the consideration to which the entity expects to be entitled in exchange for such assets or services. Unlike the scope of IAS 18, the recognition and measurement of interest income and dividend income from debt and equity instruments are no longer within the scope of IFRS 15. Instead, they are within the scope of IFRS 9 The Bank evaluates the contracts and commitments established with customers, identifying compliance with the five steps established in IFRS 15 as follows: 1. Identifying the contract : the parties' rights, payment conditions, evaluation of the commercial basis and characteristics of the compensations are identified, and the Bank evaluates if there are modifications or combinations that applied. 2. Identifying performance obligations: The Bank evaluates the commitments included in the entity's contracts to identify when the customer makes use of the service and whether the obligations are identifiable separately. 3. Determining the transaction price: The characteristics of the amounts for which the agreed services were exchanged are reviewed in the Bank's contracts, to estimate the effect of the variable consideration in kind, or others payable to the customer. 4. Allocating the transaction price to performance obligations: In the evaluation of prices to the Bank's contracts, these are designated individually to the services provided by the Bank, even in the products where there are commitments packaged. 5. Satisfaction of performance obligations: The obligations established in contracts with customers are satisfied when the control of the service is transferred to the customer and the recognition is performed as established in IFRS 15 over time or at a point in time. The Bank satisfies a performance obligation and recognizes revenue over time, if one of the following criteria is met: a) The Bank's performance does not create an asset with an alternative use for the Bank, and the Bank has an enforceable right to receive payment for the performance completed to date. b) The Bank's performance creates or enhances an asset that the customer controls as the asset is created or enhanced c) The customer simultaneously receives and consumes the benefits provided by the Bank’s performance as the Bank performs. For performance obligations where none of the indicated conditions is fulfilled, the Bank satisfies the performance obligation at a point in time, at which the customer obtains control of the promised services and the entity satisfies a performance obligation. When the Bank fulfills a performance obligation through the delivery of promised goods or services, it creates a contractual asset for the consideration amount obtained with the performance. A contract asset is the right of the Bank to receive a payment in exchange for goods or services that the Bank has transferred to a customer, when that right is dependent on another thing different than the passage of time (for example, billing or delivery of other elements part of the contract). The Bank recognizes the contractual assets as current assets, as they are expected to be realized within the normal operating cycle. The costs of contracts eligible for capitalization as incremental costs when obtaining a contract are recognized as a contractual asset. Contractual costs are capitalized when incurred if the Bank expects to recover those costs. Contractual costs constitute non-current assets to the extent that the Bank expects to receive the economic benefits of those assets in a period greater than twelve months. The contractual costs are amortized systematically and consistently with the transfer of the services to the customer once the corresponding revenue has been recognized. The capitalized contractual costs are impaired if the customer withdraws or if the carrying amount of the asset exceeds the projection of the discounted cash flows that are related to the contract. When the amount of consideration received from a customer exceeds the amount of the recognized revenue, this creates a contractual liability. Contract liabilities constitute the Bank's obligation to transfer goods or services to a customer, for which the Bank has received a payment from the end customer or if the amount is past due. They also include deferred income related to goods or services that shall be delivered or provided in the future, which will be billed to the customer in advance, but which are not yet past due. Revenue is measured based on the consideration specified in the contract with the customer, and excludes amounts received on behalf of third parties when the Bank is an agent. The Bank recognizes revenue when it transfers control over a good or service to a customer. Revenue is presented net of reimbursements and discounts and after eliminating inter-group sales. The Bank evaluates its revenue categories based on specific criteria in order to determine whether it acts as principal or agent. Revenue is recognized to the extent that it is probable that economic benefits flow to the Bank and it is possible to reliably measure revenues and costs in case there are. The Bank presents revenue recognized from contracts with customers on a disaggregated basis categories according to the nature, amount, timing and uncertainty of revenue, this being the only impact on the presentation of financial statements. The Bank also discloses information about the relationship between the disclosure of disaggregated revenue and the information of the revenue disclosed for each operating segment. Policy applicable until December 31, 2018 Revenue under IAS 18 applicable to the accounting information presented up to the year 2017, was recognized as it was probable that the economic benefits flowed to the entity and the revenues could be measured reliably. 18.1. Interest income and expenses For all financial instruments measured at amortized cost, interest income and interest expenses are recognized using the effective interest rate. The effective interest rate is the rate that exactly discounts future estimated cash flows payments through the expected life of the financial instrument or, when appropriate, a shorter period, to the net carrying value of the financial liability or asset. The computation takes into account all the contractual conditions of the financial instrument (for example, prepayment options) and includes incremental fees or expenses that are directly attributed to the instrument and are an integral part of the Effective Interest Rate (EIR), but not future credit losses. For debt securities at fair value, gains and losses arising from changes in fair value are included in the statement of income as ‘Interest and valuation on financial instruments’. 18.2. Fees and commission income The Bank charges fees for the services it provides to its customers. Fee income can be divided into the following three categories: Income from fees that are an integral part of the effective interest rate of a financial instrument: Commissions for loan commitments that have a high probability of being used are deferred (together with any incremental cost) via the effective interest rate once the loan is granted (in accordance with section 18.1). If the commitment expires and no loan is made, the fee is recognized as income at the time of termination. The opening fees received for the issuance of a financial liability measured at amortized cost are included in the effective interest rate of the financial instrument and its recognition as income is generated during the estimated life of the asset. Commissions obtained from the services that are provided during a certain period of time: Fees accrued for the transference of services during a period of time. The payments include income from commissions and asset management, custody and other administration and advisory commissions. In loan commitments when it is not possible to demonstrate the probability that a loan will be used, the opening fees of the loan are recognized in income statement during the commitment period on a straight-line basis. Fee and commission recognized on the performance of a significant act: Fees arising from the negotiation or participation in the negotiation of a transaction for a third party, such as the acquisition of shares or other securities or the purchase or sale of businesses, are recognized at the closing of the underlying transaction. Commissions or fee components that are linked to a specified performance are recognized after the corresponding criteria are met. 18.3. Dividend revenue For the investments that are not associates or joint ventures, dividends are recognized when the right to payment of the Bank is established, which is generally when the stockholders declares the dividend. These are included in the statement of income as Dividends received and share of profits of equity method investees. 18.4. Total operating income, net The income derived from commercial operations ( trading ) includes all profits and losses from variations in the fair value and revenue or expenses for related interests from financial liabilities or assets. This includes any ineffectiveness registered in the hedging transactions.
Income tax	19. Income tax The Bank recognizes, when appropriate, deferred tax assets and liabilities by the future estimate of tax effects attributable to differences between book values of assets, liabilities and their tax bases. Deferred tax assets and liabilities are measured based on the tax rate that, in accordance with the valid tax laws in each country where the Bank has operations, must be applied in the year in which the deferred tax assets and liabilities are realized or settled. The future effects of changes in tax laws or tax rates are recognized in the deferred taxes as from the date of publication of the law providing for such changes. Tax bases for deferred tax must be calculated by factoring in the definition of IAS 12 and the value of the assets and liabilities that will be realized or settled in the future according to the valid tax laws of each of the countries where The Bank has operations. Deferred tax liabilities due to deductible temporary differences associated with investments in subsidiary and associated entities or shares in joint ventures, are recognized except when the Bank is able to control the period in which the deductible temporary difference is reverted and it is likely that the temporary difference will not be reverted in the foreseeable future. Deferred tax assets, identified with temporary differences, are only recognized if it is considered likely that The Bank will have sufficient taxable income in the future that allow it to be recovered. Tax credit from fiscal losses and surplus amounts from the presumptive income on the net income are recognized as a deferred asset, provided that it is likely that the Bank will generate future net income to allow their offset. The deferred tax is recorded as debit or credit according to the result of each of the companies that form the Bank and for the purpose of disclosure on the Statement of Financial Position it is disclosed as net. The income tax expense is recognized in the consolidated income statement under the heading Income Tax, except when referring to amounts directly recognized in the OCI (Other Comprehensive Income). Regulatory changes in tax laws and in tax rates are recognized in the consolidated income statement under the Income Tax in the period when such rule becomes enforceable. Interest and fines are recognized in the consolidated income statement under the Other administrative and general expenses. The Bank periodically assesses the tax positions adopted in tax returns and according to the results of the tax audits held by the tax authorities determines possible tax eventualities provided it has a present obligation, and the Bank can reliable estimate of the amount of the obligation. The recorded sums are based on the estimated fair amount that is expected to cover the amount expected to be paid in the future. Revisions of tax returns must be documented, as well as any uncertain tax positions that are taken in them. Transfer prices policy The Bank has as a general policy that each of its companies be responsible for their income, costs and expenses independently. The above taking into account the regulation for the Matrix provided for in the Organic Statute of the Financial System (article 119 numeral 4) which in relation to the autonomy of the subsidiaries states that: "The activity of the subsidiaries of entities subject to the control and supervision of the Colombian Superintendency of Finance must be carried out in conditions of independence and administrative autonomy, so that they have sufficient capacity of own decision to carry out the operations that constitute their object " The Bank recognizes operations with economic links applying the Arm's Length Principle. These operations are documented and reported to the tax administration. Operating segments Operating segments are defined as components of the Bank for which separate financial information is available that is regularly used by the chief operating decision maker in deciding how to allocate resources and assessing performance. The Bank manages and measures the performance of its operations through the operating segments using the same accounting policies described in the summary of significant accounting policies described in Note 3.
Earnings per share	20. Earnings per share The basic earnings per share are calculated by dividing net income attributable to the ordinary equity holders of the Parent Company by the weighted average number of ordinary shares outstanding during the period. To calculate diluted earnings per share, the net income attributable to ordinary equity holders, and the weighted average number of outstanding shares is adjusted by the dilutive effects inherent to potential ordinary shares.
Paid-in capital	21. Paid-in capital Corresponds to the greater amount paid by the shareholders on the nominal value of the share.
Use of estimates and judgments	E. Use of estimates and judgments The preparation of consolidated financial statements requires the Bank's management to make judgments, estimates and assumptions that affect the application of accounting policies and the recognized amounts of assets, liabilities, income and expenses. The estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized in the period in which the estimate is revised if the revision affects only that period, or in the period of the revision and future periods if the revision affects both current and future periods. Judgments or changes in assumptions are disclosed in the notes to the consolidated financial statements. Management bases its estimates and judgments on historical experience and on various other factors that are believed to be reasonable under current circumstances. Actual results may differ from these estimates if assumptions and conditions change. The significant accounting policies that the Bank uses in preparing its consolidated financial statements are detailed below: 1. Credit risk Impairment: Expected credit losses are calculated using individual and collective models and methodologies based on assumptions and judgement considering historical credit data, current situation and reasonable and supportable forecasts of future economic The main factors considered in collective estimations of credit losses are collateral values, loan maturity and macroeconomic forecast of variables such unemployment, GDP, interest rates, among others. It is also important to consider and any other variable that could influence client´s willingness to pay. In addition, individual credit losses models consider assumptions on how the financial performance and future cash flow of a client could be affected by the client´s expected future operational and commercial activity, trends of the economic sector, and regulatory changes in the sector in which the client operates, as well as, other internal or external factors. Impairment loss models and methodologies, and the related assumptions, are assessed by the Bank´s risk vice-presidency on a regular basis, using robust validation procedures in order to assure a reasonable coverage of real losses. This process enables management to periodically determine whether assumptions and models used to measure credit risk impairment should be adjusted to achieve more precise estimations Internal controls, data governance, standards and approval processes have been implemented by the Bank to make estimations more accurate. For further details please see Note 2 Significant Accounting Policies, section 7.4.5 Impairment of financial assets at amortized cost. 2. Impairment testing of CGU including goodwill: The Bank tests goodwill recognized upon business combinations for impairment at least annually. The impairment test for goodwill involves estimates and significant judgments, including the identification of cash generating units and the allocation of goodwill based on the expectations of which operating segments the Bank will benefit from the acquisition. The fair value of the acquired companies is sensitive to changes in the valuation models’ assumptions. Adverse changes in any of the factors underlying these assumptions could lead the Bank to record a goodwill impairment charge. Management believes that the assumptions and estimates used are reasonable and supportable in the existing market environment and commensurate with the risk profile of the assets valued. See Note 8, for further information related to carrying amount, valuation methodologies, key assumptions and the allocation of goodwill. 3. Deferred tax: Deferred tax assets and liabilities are recorded on deductible or levied temporary differences originating between tax and accounting bases, taking into account the valid tax rules applicable in each country where the Bank has operations. Due to the changing conditions of the political, social and economic environment, the constant amendments to tax legislation, and the permanent changes in the tax principles and changes in interpretations by tax authorities determining the tax bases for the deferred tax items involves difficult judgments including estimates of future gains, offsets or tax deductions. Accordingly, the determination of the deferred tax is considered a critical accounting policy. For more information relating to the nature of deferred tax assets and liabilities recognized by The Bank, please see Note 11. 4. Provisions and contingent liabilities: The Bank is subject to contingent liabilities, including those arising from judicial, regulatory, arbitration proceedings, tax and other claims arising from the conduct of the Bank’s business activities. These contingencies are evaluated based on management’s best estimates and provisions are established for legal and other claims by assessing the likelihood of the loss actually occurring as probable, possible or remote. Provisions are recorded when all the information available indicates that it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation before the statement of financial position date and the amounts may be reasonably estimated. The Bank engages internal and external experts in assessing probability and in estimating any amounts involved. Throughout the life of a contingency, the Bank may learn of additional information that can affect assessments regarding probability or the estimates of amounts involved; changes in these assessments can lead to changes in recorded provisions. The Bank considers the estimates used to determine the provisions for contingent liabilities are critical estimates because the probability of their occurrence and the amounts that the Bank may be required to pay are based on the Bank’s judgment and those of its internal and external experts, which will not necessarily coincide with the future outcome of the proceedings. For further information regarding legal proceedings and contingencies and its carrying amounts. See Note 20. 5. Fair value of financial assets and liabilities: Financial assets and liabilities recorded at fair value on the Bank’s statement of financial position include debt, equity securities and derivatives classified at fair value through profit or loss, debt classified at fair value through other comprehensive income and equity securities which the Bank has made an irrevocable election to present in other comprehensive income changes in its fair value. To increase consistency and comparability in fair value measurements and related disclosures, IFRS 13 Fair value measurement specifies different levels of inputs that may be used to measure the fair value of financial instruments. In accordance with this standard, financial instruments are classified as follows: Level 1: Assets and liabilities are classified as Level 1 if there are observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. An active market is one in which transactions occur with sufficient volume and frequency to provide pricing information on an ongoing basis. Instruments are valued by reference to unadjusted quoted prices for identical assets or liabilities in active markets where the quoted price is readily available, and the price represents actual and regularly occurring market transactions. Level 2: Assets and liabilities are classified as Level 2 if in the absence of a market price for a specific financial instrument, its fair value is estimated using models whose input data are observable for recent transactions of identical or similar instruments. Level 3: Assets and liabilities are classified as level 3 if unobservable input data were used in the measurement of fair value that are supported by little or no market activity and that are significant to the fair value of these assets or liabilities. All transfers between the aforementioned levels are assumed to occur at the end of the reporting period The measurement of the fair value of financial instruments generally involves a higher degree of complexity and requires the application of judgments especially when the models use unobservable inputs (level 3) based on the assumptions that would be used in the market to determinate the price for assets or liabilities. For further details, as carrying amount and sensitivity disclosures, please see Note 29 ‘Fair value of assets and liabilities’. 6. Measurement of Employee benefits: The measurement of post-employment benefit obligations and long-term employee benefits takes into account a range of inputs and it is dependent upon a series of assumptions of future events. The projected unit credit method is used to determine the present value of the obligation for the defined benefits and its associated cost. Future measurements of obligations may differ to those presented in the financial statements, among others, due to changes in economic and demographic assumptions and significant events. For further information, see Note 18. 7. Transaction price determination With respect to contracts with the Bank’s customers, for the determination of the transaction price, the Bank allocates to each one of the performance obligations under the contract the price which represents the value expected to be received to each such performance obligation based on its relative stand-alone selling price. Such price is determined based on the cost of each service, related tax and associated risks to the operation and inherent to the transaction, plus the margin expected to be received for the services, considering in each case the market price for the service, the conditions agreed with the customer and the customer’s segment. The bank has fixed and variable prices considering the characteristics of each service, future events, discounts, returns and other variables that may influence the selling price. No significant financing components are factored in the determination of the selling price. For the periods ended December 31, 2018 and 2017 there have been no significant changes in estimates and judgements made at end-year other than those indicated in financial statements.
Recently Issued Accounting Pronouncements	F. Recently issued accounting pronouncements a) Recently Issued Accounting Pronouncements Applicable in 2018 On January 1, 2018, the Bank adopted IFRS 9 (2014) financial instruments and IFRS 15 Revenue from contracts with customers. The nature and effects of the changes resulting from the adoption of these new standards are described below: IFRS 9 financial instruments: The Bank has adopted the final version of IFRS 9 published in July 2014 that completed the replacement project of IAS 39 - Financial instruments, mainly introducing new criteria for classification and subsequent measurement of financial assets and liabilities, impairment requirements related to the accounting of expected losses and hedging accounting.  Classification and measurement: IFRS 9 (2014) establishes the categories amortized cost, fair value through profit or loss and fair value through other comprehensive income to classify financial assets, based on the entity’s business model to manage such assets and the characteristic of the flows that they generate. The final category has been introduced for specific simple debt instruments and equity instruments for which the entity irrevocably designates to recognize its changes in other comprehensive income from the initial recognition. The classification of financial liabilities and their subsequent measurement remained mostly unchanged in relation to IAS 39, except for those liabilities designated at fair value through profit or losses for which the reporting entity is required to recognize changes in own-credit risk in other comprehensive income and the accounting for contractual modifications. Due to requirements of local regulation, the Bank early adopted IFRS 9 as issued in November 2013, in the 2015 consolidated financial statements, which included only Fair value through profit or loss and amortized cost as measurement categories attributable to financial assets, based on the business model and the contractual cash flows characteristics and the option to make an irrevocable election at initial recognition for particular investments in equity instruments to present subsequent changes in fair value in other comprehensive income.  Impairment: IFRS 9 (2014) set significant changes in the assessment of the impairment of the value of financial instruments and therefore their associated risk, going from an incurred loss model to one of expected credit loss. The new regulation defined a model that identifies a Significant Increase in Credit Risk (SICR) in an instrument prior to the identification of objective evidence of impairment (EOD) and for which a loss over the life time of the asset should be measured. In this line, The Bank established the quantitative and qualitative criteria through which it is possible to identify significant increases in the credit risk of an instrument. The impairment-related requirements apply to financial assets measured at amortized cost and fair value through other comprehensive income (FVOCI) whose business model is intended to collect of contractual flows and/or sales (as well as for lease account receivables, loan commitments and financial guarantees). The Bank, in accordance with IFRS 9, estimates the Expected Credit Losses (ECL) based on the present value of the difference between contractual cash flows and expected cash flows of the instrument, estimated through collective and individual methodologies or analyses. The ECL amount will be updated on each presentation date to reflect changes in the portfolio's credit risk since the initial recognition. Through the methodological implementation plan of IFRS 9, the Bank made the necessary adaptations, including the changes required in its provision calculation model, to comply with the expected impairment and loss requirements established by the international standard. For this, new processes and procedures were created, impairment policies were updated, and a control environment aligned with the SOX requirements was designed. Impairment measurements were made through collective and individual evaluation models, with sufficient sophistication required for each portfolio. Collective models include parameters of probability of default at 12 months, life time probability of default, loss given default and exposure at default with the inclusion of the prospective criteria. The individual analysis methodology is applied in significant exposures and includes the evaluation of weighted loss scenarios, considering the macroeconomic expectations and the particular conditions of each debtor. For further information, please see Note 2.D.7.4.5.  Hedge accounting: These requirements align hedge accounting more closely with risk management, establish a more principle-based approach to hedge accounting and address inconsistencies and weaknesses in the hedge accounting model in IAS 39. Entities have been provided with an accounting policy option between applying the hedge accounting requirements of IFRS 9 or continuing with the application of the existing hedge accounting requirements of IAS 39 for all hedge accounting, as the project on macro hedge accounting has not yet been completed. In consequence, the Bank opted for continuing the application of IAS 39 requirements for hedge accounting. For further information about the impact of transition to IFRS 9 (2014) in the Bank´s financial statements, please see Note 32. Improvements to IFRS 9 Prepayment Features with Negative Compensation: Under IFRS 9, a debt instrument can be measured at amortized cost or at fair value through other comprehensive income, provided that the contractual cash flows are “solely payments of principal and interest on the principal amount outstanding” (the SPPI criterion) and the instrument is held within the appropriate business model for that classification. Amendments to IFRS 9 clarify that a financial asset passes the SPPI criterion regardless of the event or circumstance that causes the early termination of the contract and irrespective of which party pays or receives reasonable compensation for the early termination of the contract. The basis for conclusions to the amendments clarified that the early termination can result from a contractual term or from an event outside the control of the parties to the contract, such as a change in law or regulation leading to the early termination of the contract. This amendment applies for periods beginning on or after January 1, 2019 but early adoption was permitted. The Bank has early applied this amendment to make a complete transition to IFRS on January 01, 2018. Except for the impact described in Note 32, there was no other significant impact in the application of this amendment. IFRS 15, Revenue from Contracts with Customers: On May 28, 2014, the IASB published IFRS 15, which sets forth the principles of presentation of useful financial information about the nature, amount, timing and uncertainty of the income and cash flows generated from the contracts of an entity with its customers. IFRS 15 establishes that an entity recognizes revenue from ordinary activities, so they can represent the transfer of goods or services committed with customers in exchange for an amount that reflects the consideration to which the entity expects to be entitled in exchange for such assets or services. IFRS 15 replaces IAS 11 - Construction contracts, IAS 18 - Income from ordinary activities, as well as related interpretations. This rule is effective for the period beginning on January 1, 2018, and its early adoption is permitted. A significant proportion of Bank revenues are outside the scope of IFRS 15, since most of the revenue comes from the operation of financial instruments. For further information about the impact of the adoption of IFRS 15 in the Bank´s financial statements, please see Note 32. b. Recently Issued Accounting Pronouncements Applicable in Future Periods IFRS 16 Leases: On January 13, 2016 the IASB issued IFRS 16 Leases that replaces IAS 17 leases, IFRIC 4 Determination of whether a contract contains a lease, SIC 15 Incentives in lease agreements and SIC 27 Evaluation of the substance of the transaction. This standard is effective as of January 1, 2019 and establishes the principles of recognition, measurement, presentation and disclosure of leases and requires lessees to account for all their leases under the same balance sheet model similar to the accounting under IAS 17 on financial leases. At the beginning of the lease, the lessee will recognize a liability for the lease payments (liability for lease) and an asset that would represent the right to use the underlying asset during the term of the lease (right to use the asset). Lessees must separately recognize the interest expense of the lease liability and the depreciation expense of the right to use. Lessees must also adjust the lease liability from the occurrence of certain events (for example, a change in the term of the lease, a change in future lease payments resulting from a change in the index or rate used to determine these payments). The lessee will generally recognize the amount of the adjustment to the lease liability as an adjustment to the right-to-use asset. The standard includes two recognition exemptions for lessees: leasing of low-value assets (for example, personal computers) and short-term leases (that is, leases with a term of less than 12 months).The accounting of the lessor under IFRS 16 does not have substantial modifications with respect to that made under the requirements of IAS 17. The lessors will continue to classify all their leases using the same classification principles of IAS 17, between financial and operating leases. For further information about the adoption of IFRS 16 and the expected impacts in the Bank´s financial statements, please see Note 31. Annual improvements to IFRS Cycle 2015-2017 Amendments to IFRS 3 Business combination: The amendments to IFRS 3 clarify that when an entity obtains control of a business that is a joint operation, it remeasures previously held interests in that business. Management is evaluating the impact of the modification in the Bank´s statement of financial position and disclosures. Amendments to IFRS 11 Joint Arrangements : The amendments to IFRS 11 clarify that when an entity obtains joint control of a business that is a joint operation, the entity does not remeasure previously held interests in that business. Management is evaluating the impact of the modification in the Bank´s statement of financial position and disclosures. Amendments to IAS 12 Income taxes : The amendments to IAS 12 clarify the recognition of the tax effects for dividends as defined in IFRS 9, when a liability is recognized for payment of the dividend. The tax effects of dividends are linked more directly to past transactions or events that generate distributable profits than to distributions to owners. Therefore, an entity shall recognize the income tax consequences of dividends in profit or loss, other comprehensive income or equity according to where the entity originally recognized those past transactions or events. Management is evaluating the impact of the changes that the amendment of IAS 12 has on the Group, in its statement of financial position and disclosures. According to IASB, these amendments apply for annual reporting periods beginning on or after 1 January 2019. Earlier application is permitted Amendments to IAS 23 Borrowing Costs: The amendments clarify that if any specific borrowing remains outstanding after the related asset is ready for its intended use or sale, that borrowing becomes part of the funds that an entity borrows generally when calculating the capitalization rate on general borrowings. No impact is estimated in the Group's financial statements as a result of this amendment. An entity shall apply those amendments for annual reporting periods beginning on or after 1 January 2019. IFRS 17, Insurance: In May 2016, the IASB issued IFRS 17 to replace IFRS 4. Accounting for insurance contracts requires entities to separate specified embedded derivatives, investment components and performance obligations are distinguished from the insurance contracts, and to separately recognize, present and disclose insurance revenues, insurance service expenses and the insurance financial income or expense. However, a simplified measurement method is allowed to measure the quantity related to the remaining service by allocating the premium during the coverage period. This IFRS is mandatory for periods beginning on or after January 1, 2021. Early application is allowed. Management is evaluating the impact of the adoption of IFRS 17 on the Bank's financial statements and disclosures and does not expect a material effect on its current financial position or disclosures. IFRIC 23 uncertainty over income tax treatments: This interpretation has the object of reducing the diversity there is in the recognition and calculation of a tax liability or an asset when there is uncertainty about tax treatment. This interpretation applies to all accounting aspects of the income tax when there is uncertainty regarding the treatment of an element, including the tax gain or loss, the assets and liabilities tax bases, tax loss and credit and tax rates. This interpretation is mandatory for the annual periods beginning on or after January 1, 2019. The Bank shall reflect the effect of an uncertain tax position about the income tax, when it will be concludes that it is unlikely that the tax authority will accepts an uncertain tax treatment and, therefore, it will likely pay amounts relating to the uncertain tax treatment. In the determination of the current and deferred tax for periods subject to review by the tax authority, the applicable rules have been applied and interpretations have been made to take positions, on which different interpretations could be taken. As of result of the complexity of the tax system, the continuous modifications to fiscal rules, the accounting changes with implications in the tax bases and in general the legal instability of the country in some issues such as deductible expenses such as provisions, depreciation, amortization and expenses in general or in untaxed income that at any time could the tax authority have different interpretation from that of the Bank; However, the Bank and its advisors consider that their actions judgments and estimates made in each fiscal period correspond to those indicated by the tax regulations in force and, therefore, they have not considered it necessary to recognize any additional provision to those indicated in Note 20 to the financial statements. Improvements to IAS 28 Long-term interests in associates and joint ventures: The board clarifies that long-term interests in an associate or joint venture which, in essence, are part of a net investment in the associate or joint venture, are within IFRS 9, and thus, the value impairment requirements of IFRS 9 apply to these interests. An entity shall apply these amendments retroactively, in accordance with IAS 8 to the annual periods which are to be reported starting on or after January 1, 2019. Management is currently evaluating the impact of the changes that the amendment of IAS 28 would have on the Bank and its financial statements and disclosures. Amendments to IAS 19: The amendments clarify that an entity first determines any past service cost, or a gain or loss on settlement, without considering the effect of the asset ceiling. This clarification provides that entities might have to recognize a past service cost, or a gain or loss on settlement, that reduces a surplus that was not recognized before. Changes in the effect of the asset ceiling are not netted with such amounts. This amount is recognized in profit or loss. An entity then determines the effect of the asset ceiling after the plan amendment, curtailment or settlement. Any change in that effect, excluding amounts included in the net interest, is recognized in other comprehensive income. The Bank expect no impacts due to this modification, since its application is prospective and to date these events have not been presented. The amendments to this accounting standard will imply an adjustment to the deferred tax calculated as of December 2018, when the accounting basis of the liability (asset) is modified using updated actuarial assumptions to determine the cost of services for the current period and the net interest, for the rest of the annual period. The amendment are effective for annual periods beginning on or after 1 January 2019. . Conceptual Framework: The IASB issued the Conceptual Framework in March 2018, it is effective for annual periods beginning on or after 1 January 2020. It sets out a comprehensive set of concepts for financial reporting, standard setting, guidance for preparers in developing consistent accounting policies and assistance to others in their efforts to understand and interpret the standards. The Conceptual Framework includes some new concepts, provides updated definitions and recognition criteria for assets and liabilities and clarifies some important concepts.

SIGNIFICANT ACCOUNTING POLICI_3

SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Significant Accounting Policies [Line Items]
Disclosure Of Basis Of Consolidation Explanatorys [text block]	The Parent Company has the following subsidiaries making up the Bank´s organizational structure, which is currently registered as a corporate group: ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Fiduciaria Bancolombia S.A. Sociedad Fiduciaria Colombia Trust 98.81% 98.81% 98.81% Banca de Inversión Bancolombia S.A. Corporación Financiera Colombia Investment banking 100.00% 100.00% 100.00% Valores Bancolombia S.A. Comisionista de Bolsa Colombia Securities brokerage 100.00% 100.00% 100.00% Renting Colombia S.A.S. Colombia Operating leasing 100.00% 100.00% 100.00% Transportempo S.A.S. Colombia Transportation 100.00% 100.00% 100.00% Valores Simesa S.A. (1) Colombia Investments 67.73% 68.57% 68.57% Inversiones CFNS S.A.S. Colombia Investments 99.94% 99.94% 99.94% BIBA Inmobiliaria S.A.S. Colombia Real estate broker 100.00% 100.00% 100.00% FCP Fondo Colombia Inmobiliario. (2) Colombia Real estate broker 51.29% 63.47% 62.55% Prosicol S.A.S. (3) Colombia Pre-operating stage - - 68.57% Fideicomiso "Lote Abelardo Castro". Colombia Mercantil trust 67.39% 68.23% 68.23% Bancolombia Panamá S.A. Panama Banking 100.00% 100.00% 100.00% Sistemas de Inversiones y Negocios S.A. Sinesa Panama Investments 100.00% 100.00% 100.00% Banagrícola S.A. Panama Investments 99.16% 99.16% 99.16% Banistmo S.A. Panama Banking 100.00% 100.00% 100.00% Banistmo Investment Corporation S.A. Panama Trust 100.00% 100.00% 100.00% Financomer S.A. Panama Financial services 100.00% 100.00% 100.00% Leasing Banistmo S.A. Panama Leasing 100.00% 100.00% 100.00% Valores Banistmo S.A. Panama Purchase and sale of securities 100.00% 100.00% 100.00% Suvalor Panamá Fondos de Inversión S.A. Panama Holding 100.00% 100.00% 100.00% ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Suvalor Renta Fija Internacional Largo Plazo S.A. Panama Collective investment fund 100.00% 100.00% 100.00% Suvalor Renta Fija Internacional Corto Plazo S.A. Panama Collective investment fund 100.00% 100.00% 100.00% Banistmo Asset Management Inc. (4) Panama Purchase and sale of securities - - 100.00% Banistmo Capital Markets Group Inc. (5) Panama Purchase and sale of securities 100.00% 100.00% 100.00% Van Dyke Overseas Corp. (6) Panama Real estate broker - 100.00% 100.00% Inmobiliaria Bickford S.A. (6) Panama Real estate broker - 100.00% 100.00% Williamsburg International Corp. (6) Panama Real estate broker - 100.00% 100.00% Anavi Investment Corporation S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Desarrollo de Oriente S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Steens Enterpresies S.A. (5) Panama Portfolio holder 100.00% 100.00% 100.00% Ordway Holdings S.A. (5) Panama Real estate broker 100.00% 100.00% 100.00% Grupo Agromercantil Holding S.A. Panama Holding 60.00% 60.00% 60.00% Banco Agrícola S.A. El Salvador Banking 97.36% 97.36% 97.36% Arrendadora Financiera S.A. Arfinsa El Salvador Leasing 97.37% 97.37% 97.36% Credibac S.A. de C.V. El Salvador Credit card services 97.36% 97.36% 97.36% Valores Banagrícola S.A. de C.V. El Salvador Securities brokerage 98.89% 98.89% 98.89% Inversiones Financieras Banco Agrícola S.A IFBA El Salvador Investments 98.89% 98.89% 98.89% Gestora de Fondos de Inversión Banagricola S.A. El Salvador Administers investment funds 98.89% 98.89% 98.89% Arrendamiento Operativo CIB S.A.C. (7) Peru Operating leasing 100.00% 100.00% 100.00% Fondo de Inversión en Arrendamiento Operativo - Renting Perú (8) Peru Car Rental - 100.00% 100.00% Capital Investments SAFI S.A. (8) Peru Trust - 100.00% 100.00% FiduPerú S.A. Sociedad Fiduciaria (7) Peru Trust 98.81% 98.81% 98.81% Leasing Perú S.A. (8) Peru Leasing - 100.00% 100.00% Banagrícola Guatemala S.A .(8) Guatemala Outsourcing - 99.16% 99.16% Banco Agromercantil de Guatemala S.A. Guatemala Banking 60.00% 60.00% 60.00% Seguros Agromercantil de Guatemala S.A. Guatemala Insurance company 59.17% 59.17% 59.17% Financiera Agromercantil S.A. Guatemala Financial services 60.00% 60.00% 60.00% Agrovalores S.A. Guatemala Securities brokerage 60.00% 60.00% 60.00% Tarjeta Agromercantil S.A. (8) Guatemala Credit Card - 60.00% 60.00% Arrendadora Agromercantil S.A. Guatemala Operating Leasing 60.00% 60.00% 60.00% Agencia de Seguros y Fianzas Agromercantil S.A. Guatemala Insurance company 60.00% 60.00% 60.00% Asistencia y Ajustes S.A. Guatemala Services 60.00% 60.00% 60.00% Serproba S.A. Guatemala Maintenance and remodelling services 60.00% 60.00% 60.00% Servicios de Formalización S.A. Guatemala Loans formalization 60.00% 60.00% 60.00% ENTITY JURISDICTION OF INCORPORATION BUSINESS PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2018 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2017 PROPORTION OF OWNERSHIP INTEREST AND VOTING POWER HELD BY THE BANK 2016 Conserjeria, Mantenimiento y Mensajería S.A. Guatemala Maintenance services 60.00% 60.00% 60.00% Media Plus S.A. (8) Guatemala Advertising and marketing - 60.00% 60.00% Mercom Bank Ltd. Barbados Banking 60.00% 60.00% 60.00% New Alma Enterprises Ltd. Bahamas Investments 60.00% 60.00% 60.00% Bancolombia Puerto Rico Internacional Inc. Puerto Rico Banking 100.00% 100.00% 100.00% Bancolombia Caymán S.A. Cayman Islands Banking 100.00% 100.00% 100.00% Bagrícola Costa Rica S.A. Costa Rica Outsourcing 99.16% 99.16% 99.16% (1) The decrease in the shareholding is due to the repurchase of outstanding stock by the subsidiary. (2) During 2018, the Bank's shareholding decreased in the subsidiary's capitalization process. (3) Investment sold by Valores Simesa during 2017. (4) Investment absorbed by Banistmo Capital Markets Group, Inc. during 2017. (5) Investments in non-operational stage. (6) Investment absorbed by Banistmo Capital Markets Group, Inc. during 2018. (7) Investment classified as assets held for sale. See Note 12 Assets held for sale and Inventories. (8) Investment liquidated during 2018.
Disclosure of detailed information about the consolidated funds [text block]	The Bank consolidates the following funds: Name Country % of ownership interest held by the Bank, 2018 % of ownership interest held by the Bank, 2017 % of ownership interest held by the Bank, 2016 Assets managed December 2018 December 2017 FCP Fondo Colombia Inmobiliario Colombia 51.29% 63.47% 62.55% 3,205,133 2,698,224 Fideicomiso “lote Abelardo Castro” Colombia 67.39% 68.23% 68.23% 11,616 10,343 Suvalor Panamá Fondo de Inversión Panamá 100.00% 100.00% 100.00% 244 224 Fondo de Inversión en Arrendamiento Operativo Renting Perú Perú - 100.00% 100.00% - -
Disclosure of effect of changes in foreign exchange rates [text block]	The table below sets forth the exchange rate used by the Bank and its subsidiaries to convert statement of financial position accounts and transactions in U.S. dollar into Colombian pesos: December 31, 2018 December 31, 2017 December 31, 2016 Closing exchange rate 3,249.75 2,984.00 3,000.71 Average rate for the period ended at 2,956.55 2,951.21 3,053.20
Disclosure of detailed information about the degree of credit risk in three different phases	The model is structured in three phases in which the financial asset or group of financial assets can be categorized, from its initial recognition, considering the degree of credit risk and the circumstances that have produced a significant increase in it. Stage 1 (Initial recognition) 12-month expected credit losses Stage 2 (Significant increase in credit risk since initial recognition) Lifetime expected credit losses Stage 3 (Credit-impaired assets) Lifetime expected credit losses
Disclosure of detailed information about the credit loss measurement and participation of loan and receivables text block	The following table show the participation for each of the stages and the distribution of stage 2 is detailed for the reasons that represent the significant increase credit risk. Portfolio Stage 1 Stage 2 Stage Threshold Watch List Restructured More Than Total Commercial 89.2% 29.5% 61.4% 3.6% 5.5% 3.1% 7.7% Consumer 88.9% 67.4% 0.8% 9.7% 22.1% 5.9% 5.3% Mortgage 88.2% 65.5% 0.0% 11.3% 23.1%* 7.2% 4.7% Total Portfolio 89.0% 48.1% 30.7% 7.1% 14.1% 4.2% 6.8%
Disclosure of detailed information about the projections of macroeconomic variables [Table Text Block]	The following table sets forth the main macroeconomic variables that are used to incorporate the prospective information and its projections: Scenarios Macroeconomic Projections Colombia Base Scenario GDP growth Inflation Monetary Policy Rate Unemployment Exchange rate Exports Imports 2017 1.8% 4.1% 4.8% 9.6% 2,992 37,385 46,076 2018 2.6% 3.4% 4.3% 9.3% 3,060 43,035 50,140 2019 3.2% 3.4% 4.8% 8.8% 3,130 47,290 54,960 2020 3.4% 3.2% 5.3% 8.7% 3,260 46,072 59,352 2021 3.1% 3.1% 5.0% 8.6% 3,320 44,548 60,539 2022 3.3% 3.0% 4.8% 8.5% 3,370 48,213 62,658 2023 3.4% 3.0% 4.8% 8.3% 3,430 52,574 65,791 Optimistic Scenario GDP growth Inflation Monetary Policy Rate Unemployment Exchange rate Exports Imports 2017 1.8% 4.1% 4.8% 9.6% 2,992 37,385 46,076 2018 2.7% 3.1% 4.0% 9.3% 3,010 44,483 51,927 2019 3.9% 3.1% 4.3% 8.7% 3,000 49,381 57,541 2020 4.7% 2.7% 4.5% 8.4% 3,070 48,275 64,841 2021 4.3% 2.6% 4.3% 8.2% 3,090 46,630 63,825 2022 4.3% 2.6% 4.0% 8.0% 3,110 50,338 66,443 2023 4.6% 2.5% 4.0% 7.7% 3,130 54,700 69,576 Pessimistic Scenario GDP growth Inflation Monetary Policy Rate Unemployment Exchange rate Exports Imports 2017 1.8% 4.1% 4.8% 9.6% 2,992 37,385 46,076 2018 2.4% 3.7% 4.5% 9.4% 3,140 40,310 48,272 2019 2.5% 4.0% 5.3% 9.1% 3,360 41,973 52,285 2020 2.6% 3.7% 5.8% 9.0% 3,600 40,307 56,570 2021 2.1% 3.6% 5.5% 9.0% 3,740 39,946 57,905 2022 2.1% 3.6% 5.3% 9.1% 3,860 42,985 59,961 2023 2.1% 3.5% 5.3% 9.0% 3,990 47,347 63,094 Scenarios Macroeconomic Projections Panama Base Scenario GDP growth Inflation Unemployment Exports Imports Current Account Deficit 2017 5.4% 0.4% 6.0% 24,933 26,961 -8.0% 2018 3.7% 1.0% 6.5% 27,973 28,370 -5.8% 2019 5.1% 1.4% 7.2% 29,997 29,651 -4.1% 2020 4.9% 1.5% 7.5% 30,947 30,897 -4.0% 2021 4.6% 1.6% 7.9% 31,647 32,271 -3.0% 2022 4.5% 1.7% 8.2% 32,247 33,417 -3.6% 2023 4.6% 1.8% 8.5% 32,537 34,664 -3.5% Optimistic Scenario GDP growth Inflation Unemployment Exports Imports Current Account Deficit 2017 5.4% 0.4% 6.0% 24,933 26,961 -8.0% 2018 4.1% 1.0% 6.2% 28,373 28,170 -5.8% 2019 5.4% 1.3% 7.1% 30,597 28,751 -3.9% 2020 5.2% 1.5% 7.3% 31,347 29,697 -3.6% 2021 4.9% 1.6% 7.6% 32,047 31,071 -2.7% 2022 4.8% 1.6% 7.9% 32,767 32,217 -2.7% 2023 4.9% 1.6% 8.0% 33,097 33,464 -2.4% Pessimistic Scenario GDP growth Inflation Unemployment Exports Imports Current Account Deficit 2017 5.4% 0.4% 6.0% 24,933 26,961 -8.0% 2018 3.6% 1.0% 6.9% 28,197 28,370 -5.8% 2019 4.7% 1.7% 7.6% 29,197 30,851 -4.8% 2020 4.5% 1.9% 7.9% 29,647 32,097 -4.5% 2021 4.2% 1.9% 8.3% 30,047 33,471 -4.3% 2022 4.1% 2.0% 8.6% 30,147 34,617 -4.4% 2023 4.2% 2.2% 8.9% 31,737 35,864 -4.5% Scenarios Macroeconomic Projections El Salvador Base Scenario GDP growth Inflation Exports Imports Current Account Deficit Fiscal Budget Balance 2017 2.3% 2.0% 5,760 10,593 -2.0% -2.3% 2018 2.7% 1.9% 5,939 11,883 -3.3% -2.3% 2019 2.5% 1.8% 6,355 12,714 -3.4% -2.4% 2020 2.2% 1.9% 6,884 13,370 -3.5% -2.2% 2021 2.0% 1.9% 7,264 13,911 -3.6% -2.2% 2022 2.1% 1.9% 7,746 14,416 -3.5% -2.1% 2023 2.2% 2.0% 8,255 14,964 -3.4% -2.1% Optimistic Scenario GDP growth Inflation Exports Imports Current Account Deficit Fiscal Budget Balance 2017 2.3% 2.0% 5,760 10,593 -2.0% -2.3% 2018 3.2% 2.4% 5,969 11,935 -3.1% -0.8% 2019 3.6% 2.4% 6,503 12,987 -3.0% -0.9% 2020 3.5% 2.7% 7,055 13,670 -3.1% -0.8% 2021 3.2% 2.9% 7,455 14,228 -3.2% -0.8% 2022 3.4% 3.1% 7,952 14,744 -3.1% -0.8% 2023 3.5% 3.2% 8,472 15,304 -3.0% -0.8% Pessimistic Scenario GDP growth Inflation Exports Imports Current Account Deficit Fiscal Budget Balance 2017 2.3% 2.0% 5,760 10,593 -2.0% -2.3% 2018 2.3% 1.5% 5,910 11,832 -3.3% -3.5% 2019 1.8% 1.1% 6,207 12,442 -3.7% -3.8% 2020 1.4% 1.1% 6,712 13,070 -3.8% -3.6% 2021 1.1% 1.0% 7,073 13,594 -3.9% -3.5% 2022 1.3% 0.8% 7,541 14,087 -3.8% -3.4% 2023 1.4% 0.7% 8,039 14,623 -3.7% -3.5% Scenarios Macroeconomic Projections Guatemala Base Scenario GDP growth Inflation Exchange rate Exports Imports Fiscal Budget Balance 2017 2.8% 5.7% 7.34 10,983 18,389 -3.7% 2018 3.0% 4.2% 7.77 10,730 19,171 -1.7% 2019 3.3% 4.0% 7.90 10,369 18,937 -1.6% 2020 3.2% 3.7% 8.00 10,354 18,816 -1.4% 2021 3.0% 4.4% 8.09 10,769 19,399 -1.3% 2022 3.2% 4.3% 8.19 11,199 20,563 -1.2% 2023 3.3% 4.2% 8.28 11,569 21,242 -1.2% Optimistic Scenario GDP growth Inflation Exchange rate Exports Imports Fiscal Budget Balance 2017 2.8% 5.7% 7.34 10,983 18,389 -3.7% 2018 3.2% 3.7% 7.50 10,798 19,259 -1.2% 2019 4.4% 3.5% 7.52 10,656 19,290 -0.9% 2020 4.4% 2.8% 7.50 10,642 19,169 -0.8% 2021 4.4% 3.2% 7.51 11,056 19,752 -0.7% 2022 4.4% 3.4% 7.51 11,719 20,443 -0.7% 2023 4.4% 3.3% 7.53 12,235 21,343 -0.7% Pessimistic Scenario GDP growth Inflation Exchange rate Exports Imports Fiscal Budget Balance 2017 2.8% 5.7% 7.34 10,983 18,389 -3.7% 2018 2.7% 4.8% 8.03 10,662 19,083 -2.2% 2019 2.1% 4.8% 8.28 10,082 18,584 -1.9% 2020 2.0% 4.3% 8.49 10,067 18,463 -1.8% 2021 2.0% 4.7% 8.67 10,481 19,046 -1.7% 2022 2.0% 5.0% 8.86 10,901 19,999 -1.8% 2023 2.0% 4.9% 9.03 11,119 20,399 -1.8%
Disclosure of detailed information about the determination of significant increase in risk using external credit rating text block [Text Block]	According to the original classification of the investment, there may be an increase with 1, 2 or 3 notches requared to determine a significant increase in risk, as shown in the following table: EXTERNAL RATING ORIGIN SIGNIFICANT INCREASE IN RISK Ba1/BB+ 3 Notches Ba2/BB 3 Notches Ba3/BB- 3 Notches B1/B+ 2 Notches B2/B 2 Notches B3/B- 1 Notch Caa/CCC 1 Notch
Loans receivable, delinquency conditions [text block]	Loans are written off when the Bank concludes there is no realistic expectation of recovery of the loans and receivables balances from a client or third party. In general, this characteristic will be fulfilled when the following delinquency conditions are present: Type Length of delinquency Consumer 180 days, 450 days for vehicles in GAH, 720 days for loans with mortgage guarantee in Banco Agricola Commercial 360 days Small Business Loan 180 days, 720 days for loans with guarantee in Banistmo Mortgage For Banistmo and Banco Agrícola from 720 days. GAH 1440 days.
Disclosure of detailed information about useful lives of property plant and equipment [text block]	The estimated useful lives for each asset group are: Asset group Useful life range Buildings 10 to 75 years Furniture and fixtures 5 to 20 years Computer equipment 3 to 20 years Equipment and machinery 3 to 40 years Vehicles 3 to 6 years
FCP Fondo Colombia Inmobiliario S.A. [Member]
Disclosure of Significant Accounting Policies [Line Items]
Disclosure of non-controlling interests [text block]	The following table summarizes the assets, liabilities, net assets, net income and cash flows as of December 31, 2018, 2017 and 2016, related to the FCP Colombia Inmobiliario: December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Assets 3,205,133 2,698,224 2,009,382 Liabilities 963,841 1,048,867 655,315 Net assets 2,241,292 1,649,357 1,354,067 Condensed statement of income Income Valuation of investment properties 70,933 81,816 52,543 Valuation of trust rights 29,161 53,143 12,903 Rents 147,324 135,135 120,811 Profits of equity method investees 96,201 144,146 - Other income 6,940 4,493 2,616 Total Income 350,559 418,733 188,873 Expenses Interest on loans 67,593 68,900 67,558 Trust fees 554 322 9,004 Other expenses 121,162 86,270 49,078 Total Expenses 189,309 155,492 125,640 Net Income 161,250 263,241 63,233 Condensed cash flow Net cash (used in) provided by operating activities (351) (394) (372) Net cash (used in) provided by investing activities - - - Net cash (used in) provided by financing activities 334 409 375 Cash and cash equivalents at beginning of year 18 3 - Cash and cash equivalents at end of year 1 18 3
Agromercantil Holding [Member]
Disclosure of Significant Accounting Policies [Line Items]
Disclosure of non-controlling interests [text block]	The following table summarizes the assets, liabilities, net assets, net income and cash flows as of December 31, 2018, 2017 and 2016 of GAH. December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Assets 13,556,250 12,191,869 11,795,358 Liabilities 12,209,984 10,847,895 10,477,427 Equity 1,346,266 1,343,974 1,317,931 Condensed statement of income Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off-balance sheet credit instruments 388,932 389,463 393,972 Total fees and commission, net 111,932 101,565 58,745 Other operating income 52,286 54,246 55,942 Dividends received and equity method 579 608 779 Total operating income, net 553,729 545,882 509,438 Operating expenses (458,277) (445,038) (435,430) Income tax (15,910) (21,546) (11,197) Net income 79,542 79,298 62,811 Condensed cash flow Net cash (used in) provided by operating activities (66,235) 192,850 (136,878) Net cash (used in) provided by investing activities 244,949 (1,427) (4,157) Net cash (used in) provided by financing activities (2,983) (87,103) (77,684) Cash and cash equivalents at beginning of year 1,324,893 1,098,861 1,359,176 Cash and cash equivalents at end of year 1,500,624 1,203,181 1,140,457 Other comprehensive income Investments at fair value through OCI (6,598) 2,241 3,682 Translation adjustment 43,803 15,758 (64,195) Others (3,922) (3,042) 6,959 Total other comprehensive income 33,283 14,957 (53,554)

OPERATING SEGMENTS (Tables)

OPERATING SEGMENTS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Operating Segment [Abstract]
Disclosure of entity's operating segments [text block]	The CODM reviews the performance of the Bank using the following financial information by operating segment: For the year ended December 31, 2018 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation (2) Total after eliminations In millions of COP Total interest and valuation 12,215,644 1,573,928 931,405 894,934 404 22 24,273 547,878 14,737 16,203,225 (86,725) 16,116,500 Interest income on loans and financial leases 11,990,678 1,449,441 861,174 821,276 - - - 434,754 9,049 15,566,372 52 15,566,424 Total Debt investments 366,354 101,599 25,081 72,896 105 22 14,728 20,559 32 601,376 (2) 601,374 Derivatives (17,023) (13,250) - - - - 7,694 86,779 - 64,200 (86,775) (22,575) Total liquidity operations (124,365) 36,138 45,150 762 299 - 1,851 5,786 5,656 (28,723) - (28,723) Interest expenses (4,194,772) (558,126) (252,351) (360,988) (39) - (15) (247,666) (56,259) (5,670,216) - (5,670,216) Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments 8,020,872 1,015,802 679,054 533,946 365 22 24,258 300,212 (41,522) 10,533,009 (86,725) 10,446,284 Total credit impairment charges, net (3,354,330) (269,164) (94,301) (136,289) (826) (135) 155 19,039 (7,221) (3,843,072) - (3,843,072) Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments 4,666,542 746,638 584,753 397,657 (461) (113) 24,413 319,251 (48,743) 6,689,937 (86,725) 6,603,212 Revenues (Expenses) from transactions with other operating segments of the Bank (6,986) (30,634) (2,029) (7,574) (32,509) 20,187 55,843 98,987 (95,285) - - - Fees and commission income (3) 2,841,302 312,762 227,114 141,253 313,908 20,271 113,970 20,840 2,988 3,994,408 (149) 3,994,259 Fees and commission expenses (1,009,573) (120,520) (43,216) (29,320) (2,380) (46) (2,734) (3,408) (1,859) (1,213,056) - (1,213,056) Total fees and commission income, net 1,831,729 192,242 183,898 111,933 311,528 20,225 111,236 17,432 1,129 2,781,352 (149) 2,781,203 Other operating income 250,598 39,781 4,842 52,287 19,826 965 (10,468) 15,668 912,738 1,286,237 (82,435) 1,203,802 Dividends received, and share of profits of equity method investees (49,316) 4,240 1,894 580 18,572 (67,990) (12,416) (270,523) (34,485) (409,444) 751,239 341,795 Recovery (Impairment) charges on cash-generating unit - - - - - 173,339 (1) - - (4,583) 168,756 - 168,756 Total operating income, net 6,692,567 952,267 773,358 554,883 316,956 146,613 168,608 180,815 730,771 10,516,838 581,930 11,098,768 Operating expenses (4) (4,902,500) (554,890) (402,831) (373,279) (111,614) (24,110) (98,687) (53,313) (467,770) (6,988,994) (2) (6,988,996) Impairment, depreciation and amortization (177,779) (55,127) (26,122) (84,996) (588) (131) (1,402) (2,072) (144,722) (492,939) (963) (493,902) Total operating expenses (5,080,279) (610,017) (428,953) (458,275) (112,202) (24,241) (100,089) (55,385) (612,492) (7,481,933) (965) (7,482,898) Profit before tax 1,612,288 342,250 344,405 96,608 204,754 122,372 68,519 125,430 118,279 3,034,905 580,965 3,615,870 (1) Includes imparment recovery in joint venture Compañía de Financiamiento Tuya S.A. For more information see Note 7 Investments in associates and joint ventures (2) Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM. (3) For further information about income from contracts with customers, see note 24.3. Fees and commissions. (4) Includes staff costs, other administration and general expenses, contributions and other tax burdens and others. For the year ended December 31, 2017 (5) Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation (2) Total after eliminations In millions of COP Total interest and valuation 12,995,017 1,495,446 882,806 865,038 794 94 8,916 444,649 10,201 16,702,961 (6,568) 16,696,393 Interest income on loans and financial leases 12,586,875 1,374,398 830,050 767,986 - - - 412,418 13,000 15,984,727 (426) 15,984,301 Total Debt investments 602,304 93,154 31,582 100,193 193 94 15,147 16,329 735 859,731 - 859,731 Derivatives (54,156) 438 - - - - (7,661) 6,085 (289) (55,583) (6,084) (61,667) Total liquidity operations (140,006) 27,456 21,174 (3,141) 601 - 1,430 9,817 (3,245) (85,914) (58) (85,972) Interest expenses (4,791,976) (523,312) (256,994) (348,726) (102) - (72) (226,304) (85,928) (6,233,414) 428 (6,232,986) Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments 8,203,041 972,134 625,812 516,312 692 94 8,844 218,345 (75,727) 10,469,547 (6,140) 10,463,407 Total credit impairment charges, net (3,195,837) (46,468) (110,018) (125,877) (549) 466 (147) 6,541 1,696 (3,470,193) 8,576 (3,461,617) Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments 5,007,204 925,666 515,794 390,435 143 560 8,697 224,886 (74,031) 6,999,354 2,436 7,001,790 Revenues (Expenses) from transactions with other operating segments of the Bank (59,884) (26,837) (963) (972) (33,024) 16,209 53,075 101,327 (48,931) - - - Fees and commission income (3) 2,531,221 317,753 211,159 126,022 285,648 28,747 97,185 19,390 3,989 3,621,114 - 3,621,114 Fees and commission expenses (889,481) (112,986) (40,325) (24,457) (1,982) (52) (482) (2,874) (2,476) (1,075,115) - (1,075,115) Total fees and commission income, net 1,641,740 204,767 170,834 101,565 283,666 28,695 96,703 16,516 1,513 2,545,999 - 2,545,999 Other operating income 608,025 8,662 (7,799) 54,246 13,560 1,886 (11,647) 6,428 885,182 1,558,543 19,666 1,578,209 Dividends received, and share of profits of equity method investees (53,141) 7,038 324 608 18,249 (70,114) 12,278 (239,328) (61,156) (385,242) 651,412 266,170 Recovery (Impairment) charges on cash-generating unit - - - - - (173,339) (1) - - - (173,339) - (173,339) Total operating income, net 7,143,944 1,119,296 678,190 545,882 282,594 (196,103) 159,106 109,829 702,577 10,545,315 673,514 11,218,829 Operating expenses (4) (4,715,976) (569,219) (383,002) (343,646) (113,482) (34,100) (101,255) (56,593) (430,212) (6,747,485) 538 (6,746,947) Impairment, depreciation and amortization (147,262) (55,197) (34,671) (101,392) (540) (133) (1,398) (967) (137,377) (478,937) (174) (479,111) Total operating expenses (4,863,238) (624,416) (417,673) (445,038) (114,022) (34,233) (102,653) (57,560) (567,589) (7,226,422) 364 (7,226,058) Profit before tax 2,280,706 494,880 260,517 100,844 168,572 (230,336) 56,453 52,269 134,988 3,318,893 673,878 3,992,771 (1) Includes imparment recognition in joint venture Compañía de Financiamiento Tuya S.A. For more information see Note 7 Investments in associates and joint ventures (2) Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM. (3) For further information about income from contracts with customers, see Note 24.3. Fees and commissions. (4) Includes staff costs, other administration and general expenses, contributions and other tax burdens and others. (5) Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards. For the year ended December 31, 2016 (4) Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation (1) Total after eliminations In millions of COP Total interest and valuation 11,586,785 1,399,852 901,757 869,329 827 136 17,160 442,107 30,299 15,248,252 500,553 15,748,805 Interest income on loans and financial leases 11,196,951 1,284,986 844,687 763,031 - - - 431,381 25,819 14,546,855 473,487 15,020,342 Total Debt investments 464,504 94,284 48,264 96,081 283 136 18,094 16,205 3,145 740,996 1,718 742,714 Derivatives (10,197) 3,274 - 5,323 - - (2,113) (7) (1,030) (4,750) - (4,750) Total liquidity operations (64,473) 17,308 8,806 4,894 544 - 1,179 (5,472) 2,365 (34,849) 25,348 (9,501) Interest expenses (4,542,701) (457,611) (252,011) (348,219) (20) - (33) (252,030) (99,991) (5,952,616) (100,484) (6,053,100) Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments 7,044,084 942,241 649,746 521,110 807 136 17,127 190,077 (69,692) 9,295,636 400,069 9,695,705 Total credit impairment charges, net (1,797,848) (367,781) (55,985) (127,839) (164) (423) (25) (52,294) 871 (2,401,488) (329,664) (2,731,152) Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments 5,246,236 574,460 593,761 393,271 643 (287) 17,102 137,783 (68,821) 6,894,148 70,405 6,964,553 Revenues (Expenses) from transactions with other operating segments of the Bank (65,915) (20,600) (3,054) 701 (22,893) 12,891 38,677 99,914 (39,721) - - - Fees and commission income (3) 2,063,018 291,853 203,623 81,737 239,610 19,843 80,571 30,263 1,699 3,012,217 287,716 3,299,933 Fees and commission expenses (767,655) (111,590) (45,361) (22,992) (865) (22) (511) (3,253) (1,526) (953,775) (15,195) (968,970) Total fees and commission income, net 1,295,363 180,263 158,262 58,745 238,745 19,821 80,060 27,010 173 2,058,442 272,521 2,330,963 Other operating income 569,326 18,851 1,302 55,942 13,500 2,285 (9,923) 16,453 888,529 1,556,265 (89,610) 1,466,655 Dividends received, and share of profits of equity method investees (264,715) 4,692 711 779 16,873 202,062 32,567 (269,096) (175,595) (451,722) 628,414 176,692 Total operating income, net 6,780,295 757,666 750,982 509,438 246,868 236,772 158,483 12,064 604,565 10,057,133 881,730 10,938,863 Operating expenses (3) (4,142,515) (589,535) (390,309) (323,001) (87,951) (26,662) (110,317) (60,688) (400,243) (6,131,221) (321,551) (6,452,772) Impairment, depreciation and amortization (147,261) (62,459) (50,323) (112,429) (612) (93) (1,980) (972) (137,672) (513,801) (4,008) (517,809) Total operating expenses (4,289,776) (651,994) (440,632) (435,430) (88,563) (26,755) (112,297) (61,660) (537,915) (6,645,022) (325,559) (6,970,581) Profit before tax 2,490,519 105,672 310,350 74,008 158,305 210,017 46,186 (49,596) 66,650 3,412,111 556,171 3,968,282 (1) Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM. (2) For further information about income from contracts with customers, see note 24.3. Fees and commissions. (3) Includes staff costs, other administration and general expenses, contributions and other tax burdens and others. (4) Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
Disclosure of detailed information about total assets and liabilities [Text Block]	The following table presents financial information of the total assets and liabilities by operating segment: For the year ended December 31, 2018 In millions of COP Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation Total after eliminations Total assets 149,185,338 31,116,800 14,704,427 13,556,250 580,205 1,779,618 301,851 17,963,675 9,638,514 238,826,678 (18,713,060) 220,113,618 Total liabilities (132,722,635) (27,761,479) (12,963,237) (12,209,984) (86,524) (40,741) (57,765) (12,640,349) (2,336,273) (200,818,987) 7,360,594 (193,458,393) For the year ended December 31, 2017 In millions of COP Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment banking Brokerage Off shore All other segments Total before eliminations Adjustments for consolidation Total after eliminations Total assets 142,207,844 28,119,504 12,978,363 12,191,869 493,078 1,423,883 283,171 16,503,973 8,767,762 222,969,447 (19,061,236) 203,908,211 Total liabilities (125,534,492) (25,040,470) (11,318,266) (10,847,895) (80,904) (48,192) (56,789) (12,284,687) (2,300,511) (187,512,206) 8,033,545 (179,478,661)
Disclosure of detailed information about investments in associates and joint venture [text block]	The following table presents financial information of the investments in associates and joint ventures by operating segment: For the year ended December 31, 2018 (1) Banking Colombia Banking El Salvador Trust Investment banking All other segments Total In millions of COP Investments in associates and joint ventures 313,081 13,544 230,211 451,113 1,141,630 2,149,579 Equity method 32,859 1,887 20,235 27,909 104,924 187,814 (1) As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures. For the year ended December 31, 2017 (1) Banking Colombia Banking El Salvador Trust Investment banking All other segments Total In millions of COP Investments in associates and joint ventures 305,187 10,532 226,761 248,156 774,423 1,565,059 Equity method 45,976 316 34,921 21,724 150,665 253,602 (1) As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures. For the year ended December 31, 2016 (1) Banking Colombia Banking El Salvador Trust Investment banking All other segments Total In millions of COP Equity method 34,425 702 26,128 (3,923) 2,922 60,254 (1) As of December 31, 2016, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
Disclosure of detailed information about material non-cash items [text block]	The following table presents material non-cash items other than depreciation and amortization by segment: For the year ended December 31, 2018 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total In millions of COP Restructured loans that were transferred to foreclosed assets 271,695 84,390 15,782 9,377 - - - 6,376 12,373 399,993 Provisions 3,679,839 342,528 145,661 153,484 826 135 (155) (17,973) 7,140 4,311,485 For the year ended December 31, 2017 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total In millions of COP Restructured loans that were transferred to foreclosed assets 163,274 39,486 16,191 7,157 - - - - 24,030 250,138 Provisions 3,422,531 165,651 162,877 138,297 548 (467) 147 (4,449) (5,576) 3,879,559 For the year ended December 31, 2016 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off shore All other segments Total In millions of COP Restructured loans that were transferred to foreclosed assets 130,892 44,484 35,466 95,891 - - - - 97,452 404,185 Provisions 2,130,261 381,531 104,864 127,370 164 423 (34) 48,977 5,565 2,799,121
Disclosure of detailed information about Bank's total interest and valuation [text block]	The following summarizes the Bank’s total interest and valuation and long-lived assets attributable to Colombia and other foreign countries based on the country where the interest and valuation was originated: 2018 2017 2016 Geographic information Interest and valuation Long-lived assets (1) Interest and valuation Long-lived assets (1) Interest and valuation Colombia 12,379,140 4,788,744 13,108,005 4,353,782 11,695,937 Panama 2,166,482 378,021 1,986,741 297,832 1,898,058 Puerto Rico 77,917 321 68,556 388 56,519 Peru (2) 253 165,076 658 115,840 15,753 El Salvador 932,444 296,040 883,538 280,562 902,371 Costa Rica - 131 - 80 - Guatemala 895,693 170,078 866,049 166,662 870,283 Total 16,451,929 5,798,411 16,913,547 5,215,146 15,438,921 Eliminations and translation adjustment (335,429) 6,533,616 (220,667) 5,999,471 309,884 Total, net 16,116,500 12,332,027 16,692,880 11,214,617 15,748,805 (1) Included foreclosed assets, premises and equipment, investment property and goodwill presented within Other assets in the Consolidated Statement of Financial Position. (2) Investments in FiduPerú and Arrendamiento Operativo CIB S.A.C. are classified as Asset held for sale in the Consolidated Statement of Financial Position. For further information, see Note 12 Assets held for sale and inventories.

CASH AND CASH EQUIVALENTS (Tabl

CASH AND CASH EQUIVALENTS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of cash and cash equivalents [Abstract]
Disclosure of detailed information about statement of cash flow and statement of financial position [text block]	For purposes of the consolidated statement of cash flow and the consolidated statement of financial position, the following assets are considered as cash and cash equivalents: December 31, 2018 December 31, 2017 In millions of COP Cash and balances at central bank Cash 5,192,182 5,099,252 Due from central banks (1) 6,603,500 6,567,030 Due from other private financial entities 3,713,481 3,541,644 Checks on hold 216,323 141,370 Remittances of domestic negotiated checks in transit 107,531 173,827 Total cash and due from banks 15,833,017 15,523,123 Money market transactions Interbank borrowings 1,965,973 1,761,460 Reverse repurchase agreements and other similar secured loans 931,820 881,061 Total money market transactions 2,897,793 2,642,521 Total cash and cash equivalents 18,730,810 18,165,644 (1) According to External Resolution Number 005 of 2008 issued by the Colombian Central Bank, the Parent Company must maintain the equivalent of 4.50% of its customer’s deposits with a maturity term less than 18 months as a legal banking reserve, represented in deposits at the Central Bank or as cash in hand. In addition, according to Resolusion Number 177 of 2002 issued by the Guatemalian Monetary Board, Grupo Agromercantil Holding through its subsidiaria Banco Agromercantil de Guatemala must maintain the equivalent of 14.60% of its customer’s deposits daily balances as a legal banking reserve, represented in unrestricted deposits at the Bank of Guatemala. For its part, according to the norm of the banks Number 3-06 of 2000 issued by the Financial System Superintendency of El Salvador, Banco Agrícola must mantain an equivalent amount between 1.00% and 25.00% of its deposits and debt securities in issue average daily balances as a liquidity reserve, represented in unrestricted deposits or debt securities issued by El Salvador Central Bank. Finally, in accordance with the Agreement 004 of 2008 issued by the Superintendency of Banks of Panama, all Panamanian banks must maintain a minimum legal liquidity rate established at 30.00%.

FINANCIAL ASSETS INVESTMENTS _2

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of financial assets investments and derivatives [Line Items]
Disclosure Of Debt Securities Text Block [Table Text Block]	On January 1, 2018 the Bank adopted IFRS 9. Consequently, some debt securities have been reclassified from one portfolio to another or remeasured considering the Bank’s definition of its business model under IFRS 9. Debt instruments Measurement under IFRS 9 (2013) Measurement under IFRS 9 (2014) (1) Difference In millions of COP Fair value through profit or loss 10,701,855 8,777,923 (1,923,932) Amortized cost 4,157,568 3,121,981 (1,035,587) Transfer to Fair value through other comprehensive income - 2,991,352 2,991,352 Total debt instruments 14,859,423 14,891,256 31,833 (1) For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards.
Disclosure Of Financial Assets Explanatory [Text Block]	The detail of the carrying value of the financial assets investments is as follows as of December 31, 2018: Financial assets investments Measurement methodology Total carrying value Fair value through profit or loss Fair value through other comprehensive income Amortized cost In millions of COP Securities issued by the Colombian Government 7,242,168 - 50,243 7,292,411 Securities issued by foreign governments 817,639 3,143,488 272,073 4,233,200 Securities issued by government entities 43,846 - 1,875,260 1,919,106 Securities issued by other financial institutions (1) 661,176 186,250 143,750 991,176 Corporate bonds 145,032 - 1,140,602 1,285,634 Total debt instruments 8,909,861 3,329,738 3,481,928 15,721,527 Total equity securities 1,101,461 538,487 - 1,639,948 Total financial assets Investments 17,361,475 (1) Includes mortgage-backed securities (TIPS) measured at fair value through profit or loss amounting to COP 196,920 and amortized cost amounting to COP 7. For further information on TIPS’ fair value measurement see Note 29 fair value of assets and liabilities. 2017 As of December 31, 2017, the finalcial assets investments was classsifed according to IFRS 9 (2013). Financial assets investments Measurement methodology Total carrying value Fair value through profit or loss Amortized cost In millions of COP Securities issued by the Colombian Government 7,003,147 12,965 7,016,112 Securities issued by foreign governments 2,471,994 1,050,855 3,522,849 Securities issued by government entities 36,038 1,926,554 1,962,592 Securities issued by other financial institutions 1,052,776 225,431 1,278,207 Corporate bonds 137,900 941,763 1,079,663 Total debt instruments 10,701,855 4,157,568 14,859,423 Total equity securities 1,517,830 Total financial assets investments 16,377,253
Disclosure of detailed information about debt securities portfolio [Text Block]	As of December 31, 2018 Less than 1 year Between 1 and 3 years Between 3 and 5 years Greater than 5 years Total In millions of COP Securities at fair value through profit or loss Securities issued by the Colombian Government 2,376,212 2,142,086 884,248 1,839,622 7,242,168 Securities issued by foreign governments 511,149 25,165 55,041 226,284 817,639 Securities issued by government entities 27,905 10,488 109 5,344 43,846 Securities issued by other financial institutions 169,615 164,208 105,231 222,122 661,176 Corporate bonds 28,539 20,739 47,415 48,339 145,032 Subtotal 3,113,420 2,362,686 1,092,044 2,341,711 8,909,861 Fair value through other comprehensive income Securities issued by foreign governments 1,334,351 1,018,119 593,346 197,672 3,143,488 Securities issued by other financial institutions 5,807 - - 180,443 186,250 Subtotal (1) 1,340,158 1,018,119 593,346 378,115 3,329,738 Securities at amortized cost Securities issued by the Colombian Government 50,243 - - - 50,243 Securities issued by foreign governments 12,534 9,897 2,661 246,981 272,073 Securities issued by government entities 1,875,260 - - - 1,875,260 Securities issued by other financial institutions 85,366 23,650 34,734 - 143,750 Corporate bonds - 56,546 265,853 818,203 1,140,602 Subtotal 2,023,403 90,093 303,248 1,065,184 3,481,928 Total debt instruments 6,476,981 3,470,898 1,988,638 3,785,010 15,721,527 (1) For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies. As of December 31, 2017 Less than 1 year Between 1 and 3 years Between 3 and 5 years Greater than 5 years Total In millions of COP Securities at fair value through profit or loss Securities issued by the Colombian Government 2,163,682 3,299,116 1,164,689 375,660 7,003,147 Securities issued by foreign governments 962,640 408,586 736,105 364,663 2,471,994 Securities issued by government entities 11,134 14,825 6,946 3,133 36,038 Securities issued by other financial institutions 157,434 250,395 143,353 501,594 1,052,776 Corporate bonds 35,255 16,027 21,419 65,199 137,900 Subtotal 3,330,145 3,988,949 2,072,512 1,310,249 10,701,855 Securities at amortized cost Securities issued by the Colombia Government - 12,965 - - 12,965 Securities issued by foreign governments 241,944 184,454 415,229 209,228 1,050,855 Securities issued by government entities 1,909,363 17,191 - - 1,926,554 Securities issued by other financial institutions 117,075 68,166 40,190 - 225,431 Corporate bonds 26,668 15,945 148,684 750,466 941,763 Subtotal 2,295,050 298,721 604,103 959,694 4,157,568 Total debt instruments 5,625,195 4,287,670 2,676,615 2,269,943 14,859,423
Disclosure of detailed information about fair value of equity securities [Text Block]	The following table shows the fair value of equity securities: Equity securities Carrying amount December 31, 2018 December 31, 2017 In millions of COP Total of securities at fair value through profit or loss (1) 1,101,461 988,455 Total of securities at fair value through OCI 538,487 529,375 Total equity securities 1,639,948 1,517,830 (1) The growth is mainly due to the increase of the Sura Assets Management fair value by COP 69,162 at the end of the year 2018. In accordance with the price conditions agreed with Caisse de Dépôt et Placement du Québec (CDPQ) for the sale of this investment, the total Bank’s shareholding will be sold for (USD 135,173) COP 439,279.
Disclosure of fair value of investments in equity instruments designated at fair value through other comprehensive income [text block]	The following table details the equity instruments designated at fair value through other comprehensive income analyzed by listing status: Equity securities Carrying amount December 31, 2018 December 31, 2017 In millions of COP Securities at fair value through OCI : Equity securities listed in Colombia 71,626 76,178 Equity securities listed elsewhere 5,319 5,766 Equity securities unlisted: TELERED 100,126 82,384 Asociación Gremial de Instituciones Financieras Credibanco S.A. 84,807 85,342 CIFI 23,663 29,922 Compañía De Procesamiento de Medios de Pago Guatemala(Bahamas), S. A. 17,408 11,009 Transacciones y Transferencias, S. A. 6,424 5,059 CADENALCO 2,964 5,782 Deceval (1) - 22,024 Others 226,150 205,909 Total equity securities at fair value through OCI 538,487 529,375 (1) Between 2018 and 2017 Deceval was totally sold for COP 21,444 due to the merger between Bolsa de Valores de Colombia (BVC) and Deceval. This transaction transferred from OCI to retained earnings the amount of COP 20,644.
Disclosure of detailed information about securities pledged [Text Block]	The detail of the securities pledged as collateral as of December 31, 2018 and 2017 is as follows: As of December 31, 2018 Pledged financial assets Term Security pledged Carrying amount In millions of COP Investments pledged as collateral in money market Equity securities listed in stock market Less than 3 months Stocks 2,855 Securities issued by the Colombian Government Less than 3 months TES-Treasury instruments 264,292 Securities issued by the Colombian Government Between 3 and 6 months TES-Treasury instruments 67,658 Securities issued by the Colombian Government Between 6 and 12 months TES-Treasury instruments 713,974 Securities issued by the Colombian Government Greater 12 months TES-Treasury instruments 1,131,623 Securities issued by foreign governments Greater 12 months Bonds 285,463 Securities issued by other financial institutions Greater 12 months CDT 181,951 Subtotal investments pledged as collateral in money market 2,647,816 Investments pledged as collateral in derivative operations Equity securities listed in stock market Less than 3 months Stocks 91 Securities issued by the Colombian Government Between 3 and 6 months TES - Treasury instruments 1,353 Securities issued by the Colombian Government Between 6 and 12 months TES - Treasury instruments 168,375 Securities issued by the Colombian Government Greater 12 months TES - Treasury instruments 10,182 Subtotal investments pledged as collateral in derivative operations 180,001 Total securities pledged as collateral 2,827,817 As of December 31, 2017 Pledged financial assets Term Security pledged Carrying amount In millions of COP Investments pledged as collateral in repo operations Securities issued by the Colombian Government Greater twelve months TES - Treasury instruments 1,744,736 Securities issued by the Colombian Government Between six and twelve months TES - Treasury instruments 877,673 Subtotal investments pledged as collateral in repo operations 2,622,409 Investments pledged as collateral in derivative operations Securities issued by the Colombian Government Between six and twelve months TES - Treasury instruments 78,688 Securities issued by the Colombian Government Greater twelve months TES - Treasury instruments 40,247 Subtotal investments pledged as collateral in derivative operations 118,935 Total securities pledged as collateral 2,741,344
Disclosure and Details About Breakdown Of The Changes In The Gross Carrying Amount Of The Debt Securities At Fair Value Through Other Comprehensive Income And Amortized Cost [Text Block]	The following table shows the breakdown of the changes in the gross carrying amount of the debt securities at Fair value through other comprehensive income and Amortized cost, in order to explain their significance to the changes in the loss allowance for the same portfolio as discussed above: Debt instruments portfolio measure at fair value through OCI and amortized cost Stage 1 Stage 2 Total In millions of COP Gross carrying amount as at 1 January 2018 (1) 5,673,059 440,273 6,113,332 Transfers: Transfer from Stage 2 to Stage 1 153,447 (153,447) - Change in measurement (2) 130,671 - 130,671 Financial assets derecognized during the period other than write-offs (3,124,605) (279,488) (3,404,093) New financial assets purchased 3,859,206 393 3,859,599 Valuation on investments and Write-offs (133,232) 4,109 (129,123) Foreign exchange 226,961 14,319 241,280 Gross carrying amount as at 31 December 2018 6,785,507 26,159 6,811,666 (1) For further information, see adoption of new accounting standards in Note 32 Impacts on application of new standars (2) Change in measurement to transfer a small proportion of Grupo Agromercantil Holding debt instruments portfolio from fair value to amortized cost.
Disclosure and Details About Provisions Detail Using The Expected Credit Losses Model [Text Block]	As of December 31, 2018 Concept Stage 1 Stage 2 Total In millions of COP Securities at amortized cost 3,456,164 25,764 3,481,928 Carrying amount 3,467,285 26,373 3,493,658 Loss allowance (11,121) (609) (11,730) Securities at fair value through other comprehensive income 3,329,345 393 3,329,738 Carrying amount 3,332,398 393 3,332,791 Loss allowance (3,053) - (3,053)
Disclosure And Details About Changes In The Allowance For Debt Instruments Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Text Block]	The following table sets forth the changes in the allowance for debt instruments measured at amortized cost and fair value through other comprehensive income: Concept Stage 1 Stage 2 Total In millions of COP Balance of January 1, 2018 8,932 6,797 15,729 Net effect in loss allowance changes 5,044 (2,467) 2,577 Transfer to 12-Month ECL 3,955 (500) 3,455 Transfer to lifetime ECL not credit-impaired 1,089 (1,967) (878) New debt instruments purchased 6,508 - 6,508 Debt instruments that have been derecognized (7,072) (3,714) (10,786) Translation adjustment 762 (7) 755 Balance of December 31, 2018 14,174 609 14,783
Disclosure of detailed information about bank's derivatives by type of risk [Text Block]	The following table sets forth for the Bank’s derivatives by type of risk as of December 31, 2018 and 2017: Derivatives December 31, 2018 December 31, 2017 In millions of COP Forwards Assets Foreign exchange contracts 294,345 172,310 Equity contracts 981 372 Subtotal assets 295,326 172,682 Liabilities Foreign exchange contracts (299,015) (142,976) Equity contracts (7,585) (4,470) Subtotal liabilities (306,600) (147,446) Total forwards (11,274) 25,236 Swaps Assets Foreign exchange contracts 1,199,236 672,558 Interest rate contracts 252,928 274,137 Subtotal assets 1,452,164 946,695 Liabilities Foreign exchange contracts (700,903) (505,823) Interest rate contracts (257,978) (275,641) Subtotal liabilities (958,881) (781,464) Total swaps 493,283 165,231 Options Assets Foreign exchange contracts 96,218 14,995 Subtotal assets 96,218 14,995 Liabilities Foreign exchange contracts (29,589) (16,943) Subtotal liabilities (29,589) (16,943) Total options 66,629 (1,948) Derivative assets 1,843,708 1,134,372 Derivative liabilities (1,295,070) (945,853) Total, net 548,638 188,519
Disclosure of derivative financial instruments [text block]	The table below present the notional amounts of the derivatives contracts as of December 31, 2018 and 2017: Derivatives December 31, 2018 December 31, 2017 In millions of COP Forwards Assets Foreign exchange contracts 10,968,445 11,618,005 Equity contracts 495,124 1,010,557 Subtotal assets 11,463,569 12,628,562 Liabilities Foreign exchange contracts (11,482,549) (10,276,967) Equity contracts (2,278,708) (1,796,020) Subtotal liabilities (13,761,257) (12,072,987) Total forwards (2,297,688) 555,575 Swaps Assets Foreign exchange contracts 10,504,017 6,188,880 Interest rate contracts 21,281,866 16,315,701 Subtotal assets 31,785,883 22,504,581 Liabilities Foreign exchange contracts (4,962,024) (4,163,466) Interest rate contracts (16,997,169) (15,850,149) Subtotal liabilities (21,959,193) (20,013,615) Total swaps 9,826,690 2,490,966 Options Assets Foreign exchange contracts 1,797,496 697,346 Subtotal assets 1,797,496 697,346 Liabilities Foreign exchange contracts (1,638,795) (682,197) Subtotal liabilities (1,638,795) (682,197) Total options 158,701 15,149 Futures Assets Foreign exchange contracts 1,426,478 3,772,283 Equity contracts 54,002 175,500 Subtotal assets 1,480,480 3,947,783 Liabilities Foreign exchange contracts (1,434,115) - Equity contracts (3,000) - Subtotal liabilities (1,437,115) - Total futures 43,365 3,947,783 Derivative assets 46,527,428 39,778,272 Derivative liabilities (38,796,360) (32,768,799) Total, net 7,731,068 7,009,473
Disclosure of detailed information about contractual life of derivative [Text Block]	As of December 31, 2018 Forwards Swaps Options Total Assets 295,326 1,452,164 96,218 1,843,708 Up to 1 year 277,578 645,735 69,292 992,605 From 1 to 3 years 17,741 345,321 26,926 389,988 Over 3 years 7 461,108 - 461,115 Liabilities (306,600) (958,881) (29,589) (1,295,070) Up to 1 year (292,585) (270,900) (17,305) (580,790) From 1 to 3 years (14,015) (262,848) (12,284) (289,147) Over 3 years - (425,133) - (425,133) Total (11,274) 493,283 66,629 548,638 As of December 31, 2017 Forwards Swaps Options Total Assets 172,682 946,695 14,995 1,134,372 Up to 1 year 170,299 240,690 14,229 425,218 From 1 to 3 years 2,383 339,934 766 343,083 Over 3 years - 366,071 - 366,071 Liabilities (147,446) (781,464) (16,943) (945,853) Up to 1 year (141,326) (135,749) (15,836) (292,911) From 1 to 3 years (6,120) (321,708) (1,107) (328,935) Over 3 years - (324,007) - (324,007) Total 25,236 165,231 (1,948) 188,519
Disclosure Of Collaterals Explanatorys [Text Block]	The table below presents the cash collateral amounts posted under derivatives contracts as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 In millions of COP Collateral paid 213,677 154,599 Collateral received (471,340) (264,700)
Disclosure of detailed information about hedged item explanatory [Text Block]	The following table sets forth the notional amount and fair value of the hedged item recognized in the statement of financial position as ‘Financial assets investments’, as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 In millions of COP Notional amount 258,518 304,159 Fair value 285,463 341,229 December 31, 2018 December 31, 2017 In thousands of USD Notional amount 79,550 101,930 Fair value 87,841 114,353
Disclosure of offsetting of financial assets and financial liabilities [text block]	The table below presents derivative instruments subject to enforceable master netting agreements and other similar agreements but not offset in the statement of financial position as of December 31, 2018 and 2017 by derivative and by risk: As of December 31, 2018 Derivatives Assets Derivatives Liabilities In millions of COP Over-the-counter Foreign exchange contracts Swaps 1,199,236 (700,903) Forwards 294,345 (299,015) Options 96,218 (29,589) Interest rate contracts Swaps 252,928 (257,978) Equity contracts Forwards 981 (7,585) Gross derivative assets/liabilities 1,843,708 (1,295,070) Derivative financial instruments in statement of financial position 1,843,708 (1,295,070) Master netting agreements (1,179,503) 1,295,070 Cash collateral received/paid (471,340) - Total derivative financial instruments assetss/ liabilities before collateral and Master netting agreements 192,865 - As of December 31, 2017 Derivatives Assets Derivatives Liabilities In millions of COP Over-the-counter Foreign exchange contracts Swaps 672,558 (505,823) Forwards 172,310 (142,976) Options 14,995 (16,943) Interest rate contracts Swaps 274,137 (275,641) Equity contracts Forwards 372 (4,470) Gross derivative assets/liabilities 1,134,372 (945,853) Derivative financial instruments in statement of financial position 1,134,372 (945,853) Master netting agreements (894,863) 945,853 Cash collateral received/paid (239,509) - Total derivative financial instruments assetss/ liabilities before collateral and Master netting agreements - -
Disclosure of detailed information about hedged items [text block]	The following table contains details of the hedged expresures covered by the Group's hedging strategies: December 31, 2018 In millions of COP Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Assets Fair value hedges Interest rate - Fixed rate 285,463 1,829 Financial assets investments December 31, 2018 In thousands of USD Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Assets Fair value hedges Interest rate - Fixed rate 87,841 563 Financial assets investments December 31, 2017 In millions of COP Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Liabilities Fair value hedges Interest rate - Fixed rate 341,229 (1,769) Financial assets investments December 31, 2017 In thousands of USD Carrying amount of hedged item Accumulated amount of fair value adjustments on the hedged item Balance sheet line item Assets Libialities Fair value hedges Interest rate - Fixed rate 114,353 (593) Financial assets investments
Disclosure Of Detailed Information About Amounts That Affected Statement Of Comprehensive Income As Result Of Hedge Accounting Explanatory [Table Text Block]	The following table contains information regarding the effectiveness of the hedging relationships designated by the Group, as well as the impacts on profit or loss and other comprehensive income: December 31, 2018 In millions of COP Gains / (loss) recognized in OCI Hedge Ineffectiveness recognized in P&L P&L line item that includes hedge ineffectiveness Fair value hedges Interest rate - Fixed rate - 14,158 Other operating income December 31, 2017 In millions of COP Gains / (loss) recognized in OCI Hedge Ineffectiveness recognized in P&L P&L line item that includes hedge ineffectiveness Fair value hedges Interest rate - Fixed rate - (3,678) Other operating income December 31, 2016 In millions of COP Gains / (loss) recognized in OCI Hedge Ineffectiveness recognized in P&L P&L line item that includes hedge ineffectiveness Fair value hedges Interest rate - Fixed rate - 14,634 Other operating income

LOANS AND ADVANCES TO CUSTOME_2

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Loans And Advances To Customers Explanatory [Abstract]
Disclosure of loans and advances to banks [text block]	The following is the composition of the loans and financial leasing operations portfolio, net as of December 31, 2018 and 2017: Composition December 31, 2018 December 31, 2017 In millions of COP Commercial (1) 94,600,648 88,997,241 Consumer 31,993,381 27,646,114 Mortgage 22,870,685 20,512,208 Financial Leases 23,198,204 22,248,951 Small Business Loans 1,156,198 1,063,580 Total gross loans and Financial Leases 173,819,116 160,468,094 Total allowance (2) (10,235,831) (8,223,103) Total Net Loans and financial leases 163,583,285 152,244,991 (1) Includes loans to financial institutions amounting to COP 8,154,507 and COP 7,862,401 as of December 31, 2018 and 2017, respectively. (2) The allowance as of December 31, 2018 was estimated according to the expected credit losses methodology required by IFRS 9, on the other hand, the estimations for the year ended as of December 31, 2017 were computed under IAS 39, therefore both amounts are not comparable. For further information see Note 32 Impacts on application of new standards.
Disclosure of allowance for credit losses [text block]	The following table sets forth the changes in the allowance for loans and advances and lease losses as of December 31, 2018, 2017 and 2016: As of December 31, 2018 (under IFRS 9) Concept Commercial Consumer Mortgage Financial Leases Small business loans Total In millions of COP Balance of period December 31, 2017 4,514,180 2,291,829 645,101 631,402 140,591 8,223,103 + Effect of adoption of IFRS 9 512,959 237,515 106,692 176,521 1,374 1,035,061 +Balance at beginning of period January 1, 2018 5,027,139 2,529,344 751,793 807,923 141,965 9,258,164 +/- Loan purchases / Loan sales (1) (2,020) - - (377) - (2,397) + Provisions for loan losses (2) 5,003,417 3,081,883 337,092 341,651 110,317 8,874,360 - Charges-off (1,468,704) (2,012,315) (112,417) (135,674) (86,802) (3,815,912) - Recoveries (2) (3,415,455) (886,928) (163,846) (58,175) (38,471) (4,562,875) Adjusted stage 3 (3) 158,396 71,157 26,502 22,230 7,127 285,412 +/- Translation adjustment 58,060 109,750 14,640 13,392 3,237 199,079 Balance at December 31, 2018 5,360,833 2,892,891 853,764 990,970 137,373 10,235,831 (1) This ítem includes portfolio purchase/sales operation held between Bancolombia S.A. and Titularizadora Colombiana. (2) The provision for loan losses, net COP 4,311,485 differs from the COP 3,851,625 presented in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 459,860 due to the recovery of charged-off loans. (3) Provisions reflect the expected credit losses (ECL) measured using the three-step approach under IFRS 9, as described in Note 2.D Significant accounting policies. As of December 31, 2017 (under IAS 39) Concept Commercial Consumer Mortgage Financial Leases Small business loans Total In millions of COP +Balance at beginning of period 3,499,791 1,791,123 653,936 567,046 110,015 6,621,911 + Provisions for loan losses (1) 3,594,310 2,310,518 284,392 276,687 119,690 6,585,597 - Charges-off (792,145) (1,302,630) (37,677) (77,762) (65,086) (2,275,300) - Recoveries (1) (1,783,649) (510,684) (253,578) (133,986) (24,141) (2,706,038) +/- Translation adjustment (4,127) 3,502 (1,972) (583) 113 (3,067) = Balance at end of year 4,514,180 2,291,829 645,101 631,402 140,591 8,223,103 (1) The provision for loan losses, net COP 3,879,559 differs from the COP 3,468,699 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 410,860 due to the recovery of charged-off loans. As of December 31, 2016 (under IAS 39) Concept Commercial Consumer Mortgage Financial Leases Small business loans Total In millions of COP +Balance at beginning of period 2,694,965 1,321,281 572,772 579,151 80,586 5,248,755 +Allowance for loan of PA Leasing - - - 27,825 - 27,825 + Provisions for loan losses (1) 2,684,559 1,922,315 225,291 221,694 95,272 5,149,131 - Charges-off (489,573) (902,400) (24,619) (74,900) (41,710) (1,533,202) - Recoveries (1) (1,379,288) (525,510) (109,912) (180,537) (23,645) (2,218,892) +/- Translation adjustment (10,872) (24,563) (9,596) (6,187) (488) (51,706) = Balance at end of year 3,499,791 1,791,123 653,936 567,046 110,015 6,621,911 (1) The provision for loan losses, net COP 2,930,239 differs from the COP 2,643,710 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 286,529 due to the recovery of charged-off loans. The sale of a 51% interest in Compañia de Financiamiento Tuya S.A took place on October 31, 2016. The amounts recognized until that date are presented in the line “Net income from discontinued operations” of the Statement of Income. The following table is the movement associated with this company: Concept December 31, 2016 +Balance at beginning of period 351,375 + Provisions for loan losses (*) 465,947 - Charges-off (228,757) - Recoveries (*) (147,668) = Balance at end of year 440,897 (*) The provision for loan losses net of COP 318,279 differs from the COP 323,290 presented in “Credit impairment charges on loans and advances and financial leases, net" in note 30. Discontinued operations, in the amount of COP 5,011 due to provision on off balance sheet credit exposures that was accounted for as a liability under IAS 37.
Disclosure of finance lease and operating lease by lessor [text block]	The Bank has subscribed lease agreements as lessor. These leases arrangements involve machinery and equipment, computer equipment, automobile and furniture and fixtures and their terms range between one and twenty years, as follows: As of December 31, 2018 Period Gross investment in finance lease receivable Present value of minimum payments In millions of COP Within 1 year 735,187 526,581 Over 1 year, but less than 5 years 8,194,658 6,677,063 Over 5 years 22,738,577 15,994,560 Total gross investment in finance lease receivable/ present value of minimum payments 31,668,422 23,198,204 Less: Future financial income (1) (8,470,218) - Present value of payments receivable 23,198,204 23,198,204 Minimum non-collectable payments impairment (985,844) (985,844) Total 22,212,360 22,212,360 (1) Future financial income: Total Gross Investment - Total Present Value of minimum payments As of December 31, 2017 Period Gross investment in finance lease receivable Present value of minimum payments In millions of COP Within 1 year 759,852 526,604 Over 1 year, but less than 5 years 7,842,992 6,188,894 Over 5 years 22,212,438 15,533,453 Total gross investment in finance lease receivable/ present value of minimum payments 30,815,282 22,248,951 Less: Future financial income (1) (8,566,331) - Present value of payments receivable 22,248,951 22,248,951 Minimum non-collectable payments impairment (447,361) (447,361) Total 21,801,590 21,801,590 (1) Future financial income: Total Gross Investment - Total Present Value of minimum payments
Disclosure of detailed information about unsecured residual values by type of asset explanatory [Text Block]	The following table sets the unsecured residual values by type of asset as of December 31, 2018 and 2017: Type of asset December 31, 2018 December 31, 2017 In millions of COP Automobile 22,680 26,841 Technology 25,229 20,921 Machinery and equipment 11,300 8,627 Furniture and fixtures 189 62 Total 59,398 56,451 (*) The unsecured residual value is the part of the residual value of the leased asset, whose realization is not secured or is secured by a third party related to the lessor.
Disclosure of maturity analysis of operating lease payments [text block]	The following table presents the information of minimum payments by lease to be received: December 31, 2018 December 31, 2017 In millions of COP Within 1 year 216,039 110,993 Over 1 year, but less than 5 years 934,816 960,037 Over 5 years 139,493 154,996 Total 1,290,348 1,226,026
Disclosure And Details About Significant Changes In The Provisions With The Expected Credit Loss Model According To IFRS 9 Text Block [Table Text Block]	The following explains the significant changes in the provisions during, the period ended at December 31, 2018 with the expected credit loss model according to IFRS 9: Stage 1 Stage 2 Stage 3 Simplified methodology TOTAL In millions of COP Balance at January 1, 2018 1,601,051 1,042,597 6,589,347 25,169 9,258,164 Transfer to Stage 1 (40,083) (252,397) (109,871) 8,598 (393,753) Transfer to Stage 2 (88,750) 532,660 (199,399) 588 245,099 Transfer to Stage 3 (103,002) (190,762) 4,168,739 (4,099) 3,870,876 Net remeasurement of loss allowance (231,835) 89,501 3,859,469 5,087 3,722,222 New financial assets purchased/originated 770,102 343,594 1,087,934 (148) 2,201,482 Financial assets that have been derecognized (367,718) (150,433) (811,014) (39) (1,329,204) Charges-off (47,608) (138,572) (3,617,762) (11,970) (3,815,912) Foreign Exchange and other movements 35,783 28,636 136,528 (1,868) 199,079 Balance at December 31, 2018 1,759,775 1,215,323 7,244,502 16,231 10,235,831
Disclosure of detailed information about breakdown of loans to financial institutions [Text Block]	The following table shows the breakdown of loans to financial institutions by stage: As of December 31, 2018 Stage 1 Stage 2 Stage 3 TOTAL Total loans to Financial institutions 8,140,354 13,812 341 8,154,507 Allowance (15,048) (1,123) (267) (16,438) Total Net Loans with financial institutions 8,125,306 12,689 74 8,138,069

INVESTMENTS IN ASSOCIATES AND_2

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Interests In Other Entities Explanatory [Abstract]
Disclosure of detailed information of investment In associates and joint ventures [text block]	The following table presents information regarding the Bank’s investments in associates and joint ventures: Composition December 31, 2018 December 31, 2017 In millions of COP Investments in associates (1) 1,710,969 1,327,610 Investments in Joint ventures 438,610 237,449 Total 2,149,579 1,565,059 (1) As of December 31, 2018 and 2017, the amount includes investments in associates at fair value for COP 1,119,973 and COP 757,886, respectively and investments in associates accounted for by the equity method for COP 590,996 and COP 569,724 respectively. See note 29 Fair value of assets and liabilities.
Disclosure of interests in associates [text block]	The following are the investments in associates that the Bank holds as of December 31, 2018 and 2017: As of December 31, 2018 Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3) OCI (CTA) (4) OCI (Deferred tax) (5) Carrying amount In millions of COP Investments in associates PA Viva Malls (6) Development and operation of commercial spaces Colombia 49.00% 96,201 - - - - 1,119,973 Protección S.A. Administration of pension funds and severances Colombia 20.58% 42,057 15,423 2,958 - (819) 478,482 Titularizadora Colombiana S.A. Hitos* Mortgage portfolio securities Colombia 26.98% 4,962 (1,483) (94) - 40 37,391 Redeban Multicolor S.A.* Network data transmission services Colombia 20.36% 2,203 (651) - - 45 19,105 Concesiones CCFC S.A.* Construction of public works through an awarding system Colombia 25.50% 6,794 (757) (1) - 34 13,063 Internacional Ejecutiva de Aviación S.A.S. Aircraft and aircraft travel Colombia 33.33% 2,008 (4) (213) - - 12,503 Servicio Salvadoreño de Protección, S. A. de C.V. * Custodial services and transfer of monetary types El Salvador 25.00% 1,905 (727) - (30) (16) 8,867 Reintegra S.A.S.* (7) Collections and recovery of portfolio Colombia 46.00% 1,939 1,742 - - (26) 8,594 ACH Colombia S.A. * Electronic transfer services Colombia 19.94% 3,871 (952) - - 79 8,313 Servicios Financieros, S.A. de C.V. * Processing of financial transactions and electronic payment methods El Salvador 47.86% (160) 9 - (7) - 3,420 ACH de El Salvador, S. A. de C.V. * Electronic transfer services El Salvador 25.00% 143 6 - (64) - 1,258 Investments in associates classified as assets held for sale (8) Panamerican Pharmaceutical Holding Inc. Advisory services, consultation, representation, agent for individuals or company Panama 21.00% - (1,486) (69) (785) - - Avefarma S.A.S Manufacture and distribution of glass packing for pharmaceutical products Colombia 21.00% - (11,704) - - - - Glassfarma Tech S.A.S Manufacturing, elaboration and commercialization of packages and pharmaceutical products Colombia 21.00% - 127 - - - - Net investments in associates 161,923 (457) 2,581 (9) (886) (663) (9) 1,710,969 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018. See note 24.5 Dividends received, and share of profits of equity method investees (2) Corresponds to the accumulated other comprehensive income as of December 31, 2018. (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2018. (4) Corresponds to the other comprehensive income recognized as Cumulative Translation Adjustment of Foreign Currency (CTA) for the year ended December 31, 2018. (5) Corresponds to the other comprehensive income as deferred tax for the year ended December 31, 2018. (6) During 2018, the Bank increases its capital contribution in P.A Viva Malls by COP 274,951 (7) During 2018, the Bank increases its capital contribution in Reintegra S.A.S by COP 1,152 (8) As of December 31, 2018 the investment in Avefarma S.A.S., Glassfarma Tech S.A.S and Panamerican Pharmaceutical Holding inc are still classified as "assets held for sale". See note 12. Assets held for sale and inventories. (9) See Consolidated Statement of Comprehensive Income (*) As of December 31, 2017 Investments in Associates Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3) OCI (CTA) (4) Carrying amount In millions of COP Investments in associates PA Viva Malls Development and operation of commercial spaces Colombia 49.00% (5) 144,146 - - - 757,886 Protección S.A. Administration of pension funds and severances Colombia 20.58% 72,576 12,465 1,236 - 471,312 Titularizadora Colombiana S.A. Hitos* Mortgage portfolio securities Colombia 26.98% 3,305 (1,389) (768) - 35,346 Redeban Multicolor S.A.* Network data transmission services Colombia 20.36% 1,906 (651) - - 17,951 Internacional Ejecutiva de Aviación S.A.S. * Aircraft and aircraft travel Colombia 33.33% 1,071 209 - - 10,707 Concesiones CCFC S.A. Construction of public works through an awarding system Colombia 25.50% 6,756 (756) (3) - 9,383 ACH Colombia S.A. * Electronic transfer services Colombia 19.94% 3,109 (952) - - 7,338 Reintegra S.A.S. * Collections and recovery of portfolio Colombia 46.00% 1,471 1,742 (1,754) - 7,155 Servicio Salvadoreño de Protección, S. A. de C.V. * Custodial services and transfer of monetary types El Salvador 25.00% 418 (727) 238 153 6,219 Servicios Financieros, S.A. de C.V. * Processing of financial transactions and electronic payment methods El Salvador 47.86% (226) 9 - (5) 3,302 ACH de El Salvador, S. A. de C.V. * Electronic transfer services El Salvador 25.00% 123 6 - (1) 1,011 Investments in associates classified as assets held for sale (6) Panamerican Pharmaceutical Holding Inc * Advisory services, consultation, representation, agent for individuals or company Panama 21.00% (1,171) (1,417) 196 (67) - Avefarma S.A.S* Manufacture and distribution of glass packing for pharmaceutical products Colombia 21.00% 6,307 (11,704) (10,831) - - Glassfarma Tech S.A.S * Manufacturing, elaboration and commercialization of packages and pharmaceutical products Colombia 21.00% (458) 127 139 - - Net investments in associates 239,333 (3,038) (11,547) (7) 80 1,327,610 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2017. See note 24.5 Dividends received, and share of profits of equity method investees (2) Corresponds to the accumulated other comprehensive income as of December 31, 2017 . (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2017. (4) Corresponds to the other comprehensive income recognized as Cumulative Translation Adjustment of Foreign Currency (CTA) for the year ended December 31, 2017. (5) As of December 31, 2017 the increases of ownership interest are related to capital contributions during the year 2017. (6) As of December 31, 2017 the Bank classified the investment in Avefarma S.A.S., Glassfarma Tech S.A.S and Panamerican Pharmaceutical Holding inc as "assets held for sale", due to the fact that the management has currently been implementing a plan to sell these assets. See note 12 assets held for sale and inventories. (7) See Consolidated Statement of Comprehensive Income. (*)
Disclosure of associates [text block]	The following is additional information regarding the Bank’s most significant associates as of December 31, 2018 and 2017 (unaudited accounts): As of December 31, 2018 Company name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millions of COP PA Viva Malls 2,301,567 11,304 417,942 271,648 9,064 Protección S.A. (1) 2,172,208 675,135 1,387,294 205,134 37,861 Titularizadora Colombiana S.A. Hitos 151,447 16,911 50,213 14,923 2,824 (1) The difference between, the net assets of Protección S.A. multiplied by the Bank’s percentage of ownership, which amounted to COP 308,048 for the year ended December 31, 2018 and the carrying amount of the Bank’s interest in the associate; represents the goodwill recognized by the Bank amounting to COP 170,434. As of December 31, 2017 Company Name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millions of COP PA Viva Malls (1) 1,262,837 29,499 380,612 235,647 35,278 Protección S.A. (2) 2,125,552 663,326 1,227,139 343,345 36,825 Titularizadora Colombiana S.A. Hitos 614,032 487,073 35,714 8,161 3,121 (1) The difference between the net assets of P.A. Viva Malls multiplied by the Bank’s percentage of ownership, which amounted to COP 604,336 for the year ended December 31, 2017 and the carrying amount of the Bank’s interest in the associate, represents an adjustment amounted to COP 153,550 related to contractual terms with respect to the recognition of benefits. (2) The difference between the net assets of Protección S.A. multiplied by the Bank’s percentage of ownership, which amounted to COP 300,926 for the year ended December 31, 2017, and the carrying amount of the Bank’s interest in the associate, represents the goodwill recognized by the Bank amounting to COP 170,434
Disclosure of interests in joint arrangements [text block]	The following are the Joint ventures that the Bank holds as of December 31, 2018 and 2017: As of December 31, 2018 Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3 ) Carrying amount Compañía de financiamiento Tuya S.A (4)(5) Financing company Colombia 50.00% 27,623 - - 431,510 Puntos Colombia S.A.S Administration of the customers loyalty Colombia 50.00% (1,613) - - 5,600 P.A Servicios Tecnológicos Arus- Bancolombia (6) Technology services provider Colombia 50.00% - - - 1,500 Servicios de Aceptación S.A.S (in liquidation) (7) Network data transmission services Colombia 50.00% (110) - - - Fideicomiso Ruta del Sol - compartimento A Investment in infrastructure projects Colombia 50.00% (9) 13 - - Net investments in joint ventures 25,891 13 - 438,610 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018 (2) Corresponds to the accumulated other comprehensive income as of December 31, 2018 (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2018 (4) The revaluation of the consumer loan portfolio in Colombia increased significantly during 2018, and there was an improvement in loan coverage rates due to the economic cycle in the country and the current payment behavior in the consumer segment. As a result, management measured the recoverable amount of Tuya's Cash Generation Unit (CGU). The measurement was estimated by determining the fair value of the asset which implies the professional services of a business valuation specialist; as a result of the valuation the Bank recognized a recovery of the impairment loss of COP 173,339. For more information about the applied valuation technique, see note 29 Fair value of assets and liabilities. (5) In March 2018, The Bank increases its capital contribution in Compañia de Financiamiento TUYA S.A for COP 5,000 (6) In December 2018, Banca de Inversión Bancolombia, a Bank’s subsidiary, entered into an agreement with ARUS whereby both parties have joint control to the net assets of P.A Servicios Tecnológicos Arus- Bancolombia. The purpose of the entity is to provide technology services. (7) The joint venture of Servicios de Aceptación SAS was derived from the alliance between Bancolombia and First Data for improving the development of the credit card business for individuals, however the strategy was refocused in 2018. Consequently, both parties agreed to advance in the development of this business considering First Data as the Bank’s service provider of processing data and to dissolve the joint venture. As of December 31, 2017 Company name Main activity Country % of Ownership interest Included in earnings (1) Total OCI (2) OCI (Equity method) (3 ) Carrying amount In millions of COP Compañía de financiamiento Tuya S.A (4) Financing company Colombia 50.00% 20,778 - - 225,548 Puntos Colombia S.A.S (5) Administration of the customers loyalty Colombia 50.00% (1,787) - - 7,213 Servicios de Aceptación S.A Network data transmission services Colombia 50.00% 1,663 - - 4,688 Fideicomiso Ruta del Sol - compartimento A (6) Investment in infrastructure projects Colombia 50.00% (6,385) 13 - - Net investments in joint ventures 14,269 13 - 237,449 (1) Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2017. See note 24.5 Dividends received, and share of profits of equity method investees (2) Corresponds to the accumulated other comprehensive income as of December 31, 2017. (3) Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2017. (4) On December 2017, given the continued impairment of the consumer loans portfolio of the company during 2017, the Bank management performed a valuation, to establish the fair value of the Compañía de Financiamiento TUYA S.A. As a result of the valuation, the fair value of the investment was lower than the book value, for this, the Bank recorded an impairment in the statement of income for COP 173,339. See note 29 Fair value for assets and liabilities. (5) In June 2017, Banca de Inversión Bancolombia formed a joint venture with Grupo Éxito. The purpose of the company is the developing and administration of customer’s loyalty programs provided by both parties in the agreement. (6) Given the losses of Fideicomiso Ruta del Sol - compartimento A for the year 2017, the aplication of the equity method resulted in a reduction of the total book value of the investment.
Disclosure of joint ventures [text block]	The following is complementary information regarding the Bank’s most significant joint ventures as of December 31, 2018 and 2017: As of December 31, 2018 Company name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millons of COP Compañía de financiamiento TUYA S.A. 2,790,596 2,447,483 1,450,242 55,258 - . As of December 31, 2017 Company name Assets Liabilities Income from ordinary activities Profits (loss) Dividends In millons of COP Compañía de financiamiento TUYA S.A. 2,571,106 2,293,239 1,344,712 41,556 371

GOODWILL AND INTANGIBLE ASSET_2

GOODWILL AND INTANGIBLE ASSETS, NET (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about intangible assets [abstract]
Disclosure Of Detailed Information Of Intangible Assets And Goodwill [Text Block]	Intangibles assets and goodwill net are as follows: December 31, 2018 December 31, 2017 In millions of COP Intangible assets 563,452 535,465 Goodwill 6,638,403 6,095,959 Total 7,201,855 6,631,424
Disclosure of detailed information about intangible assets [text block]	The following table sets forth the Bank's intangible assets as of December 31, 2018 and 2017, including the reconciliation of initial and final balances of the cost and accrued amortization: As of December 31, 2018 Cost Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2018 17,642 526,923 344,020 888,585 Acquisitions - 133,376 - 133,376 Write off - (29,663) - (29,663) Foreign currency translation adjustment 1,571 23,758 30,638 55,967 Balance at December 31, 2018 19,213 654,394 374,658 1,048,265 Amortization Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2018 (5,040) (203,554) (144,526) (353,120) Write off - 25,929 - 25,929 Amortization expense (2,497) (64,204) (56,850) (123,551) Foreign currency translation adjustment (697) (14,865) (18,509) (34,071) Balance at December 31, 2018 (8,234) (256,694) (219,885) (484,813) Intangible assets at December 31, 2018, net 10,979 397,700 154,773 563,452 As of December 31, 2017 Cost Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2017 17,741 481,643 345,946 845,330 Acquisitions - 70,681 - 70,681 Write off - (24,296) - (24,296) Foreign currency translation adjustment (99) (1,105) (1,926) (3,130) Balance at December 31, 2017 17,642 526,923 344,020 888,585 Amortization Trademarks Licenses, software and computer applications Client relationships Total In millions of COP Balance at January 1, 2017 (2,533) (200,995) (77,860) (281,388) Write off - 44,690 - 44,690 Amortization expense (2,493) (47,698) (66,561) (116,752) Foreign currency translation adjustment (14) 449 (105) 330 Balance at December 31, 2017 (5,040) (203,554) (144,526) (353,120) Intangible assets at December 31, 2017, net 12,602 323,369 199,494 535,465
Disclosure of reconciliation of changes in goodwill [text block]	The following table sets forth an analysis of the activity in the goodwill account: December 31, 2018 December 31, 2017 In millions of COP Balance at beginning of the year, net 6,095,959 6,130,095 Effect of change in foreign exchange rate 542,444 (34,136) Balance at end of the year, net 6,638,403 6,095,959
Disclosure of information for cash-generating units [text block]	The key assumptions used by management in determining the recoverable amount are: Operating segment Goodwill 2018 Valuation Methodology Key Assumptions Discount Rate (real) Growth rate (real) Banking El Salvador COP 916,673 Discounted Cash flow 5 years plan 12.40% 3.90% Banking Panama COP 4,963,252 Discounted Cash flow 5 years plan 9.10% 6.70% Banking Guatemala COP 758,478 Discounted Cash flow 5 years plan 11.70% 5.20%
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [text block]	As of December 31, 2018 Banking Panama Growth rate Discount rate 9.35% 9.10% 8.85% 6.70% COP 10,044,682 COP 11,157,929 COP 12,531,296 Discount rate Growth rate 6.45% 6.70% 6.95% 9.10% COP 10,458,284 COP 11,157,929 COP 12,020,283 Banking El Salvador Growth rate Discount rate 12.65% 12.40% 12.15% 3.90% COP 2,893,147 COP 2,975,432 COP 3,062,694 Discount rate Growth rate 3.65% 3.90% 4.15% 12.40% COP 2,945,601 COP 2,975,432 COP 3,007,065 Banking Guatemala Growth rate Discount rate 11.95% 11.70% 11.45% 5.20% COP 1,649,883 COP 1,719,017 COP 1,793,745 Discount rate Growth rate 4.95% 5.20% 5.45% 11.70% COP 1,684,998 COP 1,719,017 COP 1,755,758 As of December 31, 2017 Banking Panama Growth rate Discount rate 9.15% 8.90% 8.65% 6.70% COP 9,750,408 COP 10,939,812 COP 12,435,319 Discount rate Growth rate 6.45% 6.70% 6.95% 8.90% COP 10,161,356 COP 10,939,812 COP 11,917,875 Banking El Salvador Growth rate Discount rate 12.55% 12.30% 12.05% 3.40% COP 2,520,931 COP 2,588,656 COP 2,660,269 Discount rate Growth rate 3.15% 3.40% 3.65% 12.30% COP 2,564,330 COP 2,588,656 COP 2,614,375 Banking Guatemala Growth rate Discount rate 11.55% 11.30% 11.05% 5.30% COP 2,239,238 COP 2,339,936 COP 2,449,482 Discount rate Growth rate 5.05% 5.30% 5.55% 11.30% COP 2,295,042 COP 2,339,936 COP 2,388,737 The Bank considers goodwill as an asset with indefinite useful life.

PREMISES AND EQUIPMENT, NET (Ta

PREMISES AND EQUIPMENT, NET (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [abstract]
Disclosure of detailed information about property, plant and equipment [text block]	As of December 31, 2018 and 2017 the premises and equipment consisted of the following: As of December 31, 2018 Premises and equipment Balance at January 1, 2018 Roll - forward Acquisitions Expenses depreciation Disposals Assets classified as held for sale Effect of changes in foreign exchange rate Balance at December 31, 2018 In millions of COP Land Cost 337,362 20,924 - (6,079) - 9,525 361,732 Construction in progress Cost 5,129 6,485 - (8,448) - (713) 2,453 Buildings Cost 1,304,539 21,817 - (34,850) (5,916) 58,927 1,344,517 Accumulated depreciation (285,118) - (29,199) 2,913 - (19,587) (330,991) Furniture and fixtures Cost 601,275 28,221 - (24,861) - 24,793 629,428 Accumulated depreciation (334,054) - (36,073) 18,695 - (7,502) (358,934) Computer equipment Cost 782,476 142,451 - (50,282) (4,708) 26,874 896,811 Accumulated depreciation (497,976) - (80,980) 47,345 4,578 (40,693) (567,726) Vehicles Cost 1,410,709 679,356 - (249,771) (170,145) 1,701 1,671,850 Accumulated depreciation (371,276) (231) (145,529) 11,673 61,988 (652) (444,027) Ongoing Imports Cost 3,502 3,053 - (5,288) - - 1,267 Leasehold improvements Cost 297,500 19,180 - (7,737) - 5,469 314,412 Accumulated depreciation (126,663) - (25,970) 7,188 - (6,700) (152,145) Total premises and equipment - cost 4,742,492 921,487 - (387,316) (180,769) 126,576 5,222,470 Total premises and equipment - accumulated depreciation (1,615,087) (231) (317,751) 87,814 66,566 (75,134) (1,853,823) Total premises and equipment, net 3,127,405 921,256 (317,751) (1) (299,502) (114,203) 51,442 3,368,647 (1) The difference with the Consolidated Statement of Income is the expense depreciation by the premises and equipment of the investments classified as assets held for sale, the amortization of intangible assets and impairment of other assets. See Note 25.2 Impairment, depreciation and amortization. As of December 31, 2018 the premises and equipment of Assets held for sale consist of: Premises and equipment Balance at January 1, 2018 Roll - forward Balance at December 31, 2018 Acquisitions Expenses depreciation Disposals Assets classified as held for sale Effect of changes in foreign exchange rate In millions of COP Fixtures and fittings Cost 111 - - - - (1) 110 Accumulated depreciation (95) - (9) - - 2 (102) Computer equipment Cost 113 - - - - 7 120 Accumulated depreciation (86) - (12) - - (14) (112) Vehicles Cost 142,647 84,344 - (1,850) (26,913) 12,453 210,681 Accumulated depreciation (33,221) (54) (24,833) 365 13,446 (2,044) (46,341) Total premises and equipment - cost 142,871 84,344 - (1,850) (26,913) 12,459 210,911 Total premises and equipment - accumulated depreciation (33,402) (54) (24,854 365 13,446 (2,056) (46,555) Total premises and equipment, net 109,469 84,290 (24,854) (1,485) (13,467) 10,403 164,356 As of December 31, 2017 Premises and equipment Balance at January 1, 2017 Roll - forward Balance at December 31, 2017 Acquisitions Expenses depreciation Disposals Assets classified as held for sale Subsidiary liquidation Effect of changes in foreign exchange rate In millions of COP Land Cost 334,499 4,050 - (904) - - (283) 337,362 Construction in progress Cost 32,883 48,849 - (76,066) - - (537) 5,129 Buildings Cost 1,185,296 130,766 - (27,041) - (5,973) 21,491 1,304,539 Accumulated depreciation (259,400) - (29,451) 3,449 - - 284 (285,118) Furniture and fixtures Cost 572,699 40,187 - (12,647) (111) (37) 1,184 601,275 Accumulated depreciation (300,731) - (39,912) 9,317 95 30 (2,853) (334,054) Computer equipment Cost 717,464 100,939 - (29,301) (6,025) (39) (562) 782,476 Accumulated depreciation (477,339) - (73,772) 46,358 5,740 18 1,019 (497,976) Vehicles Cost 1,461,628 650,232 - (305,457) (318,880) (32,845) (43,969) 1,410,709 Accumulated depreciation (387,491) (2,866) (144,159) 14,022 113,100 15,740 20,378 (371,276) Airplane Cost 60,614 - - (59,614) - - (1,000) - Accumulated depreciation (6,227) - (356) 6,480 - - 103 - Ongoing Imports Cost 1,929 6,472 - (4,744) - - (155) 3,502 Leasehold improvements Cost 248,358 61,284 - (7,812) - - (4,330) 297,500 Accumulated depreciation (68,485) - (28,631) (29,723) - - 176 (126,663) Total premises and equipment - cost 4,615,370 1,042,779 - (523,586) (325,016) (38,894) (28,161) 4,742,492 Total premises and equipment - accumulated depreciation (1,499,673) (2,866) (316,281) 49,903 118,935 15,788 19,107 (1,615,087) Total premises and equipment, net 3,115,697 1,039,913 (316,281) (1) (473,683) (206,081) (23,106) (9,054) 3,127,405 (1) The difference with the Consolidated Statement of Income is the expense depreciation by premises and equipment of the investments classified as assets held for sale, the amortization of intangible assets and impairment of other assets. See Note 25.2 Impairment, depreciation and amortization.

INVESTMENT PROPERTIES (Tables)

INVESTMENT PROPERTIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of detailed information about investment property [abstract]
Disclosure of significant adjustments to valuation obtained [text block]	The table below sets forth the reconciliation between the initial balance account and the balance at the end of the period, at fair value: December 31, 2018 December 31, 2017 In millions of COP Balance at the beginning of the year 1,657,409 1,581,689 Acquisitions 8,536 92,102 Sales/Write-offs (10,422) (71,955) Gains on valuation (1) 77,350 55,573 Balance at the end of the period (2) 1,732,873 1,657,409 (1) See note 24.4. Other operating income, net. (2) Between December 31, 2018 and 2017 there were no transfers in and out of Level 3 fair value hierarchy related with investment properties. See Note 29 Fair value of assets and liabilities.
Disclosure of detailed information about investment property [text block]	The valuation adjustments recorded by the Bank's related to its investment properties are detailed below: As of December 31, 2018 Type of asset Balance at the beginning of the year Appraisals Net increase (decrease) in investment properties Adjusted fair value at the ‎ end of the year (1) In millions of COP Buildings 1,425,585 59,895 (1,886) 1,483,594 Lands 231,824 17,455 - 249,279 Total 1,657,409 77,350 (1,886) 1,732,873 As of December 31, 2017 Type of asset Balance at the beginning of the year Appraisals Net increase (decrease) in investment properties Adjusted fair value at the ‎ end of the year (1) In millions of COP Buildings 1,355,717 49,721 20,147 1,425,585 Lands 225,972 5,852 - 231,824 Total 1,581,689 55,573 20,147 1,657,409 (1) Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC).
Rental income from investment property, net of direct operating expense [Text Block]	The table sets forth the main income recorded by the Bank related to its investment properties: December 31, 2018 December 31, 2017 December 31, 2016 In millions of COP Income from rentals 79,756 77,964 66,838 Operating expenses due to: Investment properties that generated income through rentals 16,531 21,012 21,254 Investment properties that did not generate income through rentals 1,630 2,295 2,495

INCOME TAX (Tables)

INCOME TAX (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Income Tax [Abstract]
Disclosure Of Detailed Information About Income tax components recognized in income statement [Text Block]	11.1. Components recognized in the income statement of the period: December 31, 2018 December 31, 2017 December 31, 2016 In millions of Colombian pesos Current tax Fiscal term 752,728 1,041,454 813,355 Prior fiscal terms (1) (146,837) 3,967 2,519 Total current tax 605,891 1,045,421 815,874 Deferred tax Fiscal term 223,544 193,177 360,958 Total deferred tax 223,544 193,177 360,958 Total tax 829,435 1,238,598 1,176,832 (1) The recoveries of previous periods for $ 85,921 was recognized in 2017 in Bancolombia as income.
Disclosure Of Detailed Information About Income Tax Components Recognized In Other Comprehensive Income [Text Block]	11.2. Components recognized in Other Comprehensive Results (OCI) December 31, 2018 In millions of Colombian pesos Amounts before taxes Deferred tax Net after taxes Revaluation losses related to the defined benefit liability 37,325 (7,663) 29,662 Net income (loss) from financial instruments measured at fair value (16,873) 10,190 (6,683) Unrealized gains/(loss) on investments in associates and joint ventures using equity method. 2,581 (663) 1,918 Net profit (loss) on foreign investment hedge 458,943 172,870 631,813 Net 481,976 174,734 656,710 See Consolidated Statement of Comprehensive Income December 31, 2017 In millions of Colombian pesos Amounts before taxes Deferred tax Net after taxes Revaluation losses related to the defined benefit liability 3,753 (3,725) 28 Net income (loss) from financial instruments measured at fair value 17,548 9,789 27,337 Net profit (loss) on foreign investment hedge 449,640 (6,895) 442,745 Net 470,941 (831) 470,110 See Consolidated Statement of Comprehensive Income December 31, 2016 In millions of COP Amounts before taxes Deferred tax Net after taxes Remeasurement loss related to defined benefit liability 626 (10,966) (10,340) Net profit (loss) by financial instruments measured at fair value 208,276 24,341 232,617 Net 208,902 13,375 222,277 See Consolidated Statement of Comprehensive Income
Disclosure Of Detailed Information about Applicable Tax Rates [Text Block]	11.3. Other revelations 11.3.1. Explanation of applicable fees The following are the nominal rates of the current tax in each of the countries where Grupo Bancolombia has operations subject to income tax: Companies domiciled in Colombia The current income tax rate in accordance with Law 1819 of 2016, for the taxable periods 2018, 2017 and 2016 was: 2018 2017 2016 Rent 33.00% 34.00% 25.00% CREE 0% 0% 9.00% Surcharge 4.00% 6.00% 6.00% Total 37.00% 40.00% 40.00% The deferred tax as of December 31, 2018 was calculated based on the temporary differences, taking into account the applicable rates for 2019 and following years, as follows: 2019 2020 2021 2022 onwards Rent 33.00% 32.00% 31.00% 30.00% Additional points 4.00% 3.00% 3.00% 0 Total 37.00% 35.00% 34.00% 30.00% Domiciled companies in other countries The current and deferred income tax rate, for the taxable periods 2017 and 2018 was: 2017 2018 2019 onwards Companies in Peru Rent 29.50% 29.50% 29.50% Companies in Panama Rent 25.00% 25.00% 25.00% Companies in El Salvador Rent 30.00% 30.00% 30.00% Companies in Guatemala Rent 25.00% 25.00% 25.00%
Disclosure of temporary difference, unused tax losses and unused tax credits [text block]	11.3.2. Amount of temporary differences in subsidiaries, branches, associates over which deferred tax was not recognized is: December 31, 2018 December 31, 2017 In millions of Colombian pesos Temporary differences Local Subsidiaries (442,739) (1,043,724 Foreign Subsidiaries (4,547,635) (4,533,672)
Disclosure of deferred taxes [text block]	In accordance with IAS 12 no deferred tax credit was recorded, because the administration can control the future time in which such differences are reversed and this is not expected to occur in the foreseeable future. 11.3.3. Temporary differences as of December 31, 2018 - Net effect of deferred tax assets and liabilities by company disclosed in the Financial Position Statement: December 31, 2018 December 31, 2018 December 31, 2017 December 31, 2017 In millions of Colombian pesos Company Deferred Tax Asset Deferred Tax Liability Deferred Tax Asset Deferred Tax Liability Arrendadora Financiera S.A. 94 299 Bagrícola Costa Rica S.A. 74 56 - Grupo Agromercantil Holding (13,566) - (29,924) Banca de Inversión Bancolombia S.A. (20,300) - (26,432) Banco Agrícola S.A. 67,527 46,328 - Bancolombia S.A. (1,245,807) - (1,368,062) Banistmo SA and Subsidiaries 198,958 96,533 - BIBA Inmobiliaria S.A.S. (19) - (5) Trust Fund "Lote Abelardo Castro" (123) - (188) Fiduciaria Bancolombia S.A. (4,265) 1,808 - Inversiones CFNS S.A.S. (1,011) - (700) Renting Colombia S.A. (22,450) - (5,466) Transportempo S.A.S 163 509 - Valores Banagrícola S.A. 19 10 - Valores Bancolombia S.A. 4,342 3,071 - Valores Simesa S.A. (10,754) - (9,421) Net Deferred Tax by Company 271,177 (1,318,295) 148,614 (1,440,198) Net Deferred Tax (1,047,118) (1,291,584) This section shows the net deferred tax resulting from each company and differs from the information in section 11.3.4, because there the deferred tax is disclosed according to its nature. 11.3.4. Asset and liability deferred tax detail without netting by company This section shows the deferred tax according to its nature and differs from the information in section 11.3.3, because there the deferred tax is shown net by company. Assets deferred tax with effect on Income Statement, OCI and Equity Deferred tax summary in balance sheet accounts December 31, 2017 With effects on Results With effects on OCI and Retained Profits Eliminations Reclassifications December 31, 2018 In millions of Colombian pesos Assets deferred tax Results 559,220 127,463 - (5,752) 23,870 704,801 Assets deferred tax OCI and Equity 43,645 - 435,826 - (1,595) 477,876 Net Deferred Tax 602,865 127,463 435,826 (5,752) 22,275 1,182,677 December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Asset Deferred Tax: Property and equipment 21,153 3,848 812 18,117 Employee Benefits 161,524 2,021 12,824 172,327 Deterioration assessment 204,910 207,296 59,306 56,920 Tax credits settlement 68,463 209 5,935 74,189 Financial Obligations 51,863 1,916 241,918 291,865 Investments evaluation 81 6,495 80,277 73,863 Other deductions 51,226 38,257 4,551 17,520 Total Asset Deferred Tax 559,220 260,042 405,623 704,801 December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Asset Deferred Tax: Net profit (loss) on foreign investment hedge 6,895 - 172,870 179,765 Employee Benefits 36,750 9,625 1,478 28,603 IFRS 9 implementation adjustment (1) - 17,614 287,122 269,508 Total Asset Deferred Tax 43,645 27,239 461,470 477,876 (1) Value recorded against retained earnings, not other comprehensive income (ORI) In accordance with the financial projections, it is expected in the future to generate sufficient liquid income to offset the items recorded as deductible deferred tax. These estimates start from the financial projections that were prepared taking into account the information of the Bancolombia Group's economic research, the expected economic environment for the next five years. The main indicators on which the models are based are GDP growth, loans growth and interest rates. In addition to these elements, the Bank's long-term strategy is taken into account. Liability deferred tax with effect on Income Statement, OCI and Equity Deferred tax summary in balance sheet accounts December 31, 2017 With effects on Results With effects on OCI and Retained Profits Eliminations Reclassifications December 31, 2018 In millions of Colombian pesos Liability deferred tax Results (1,784,575) (293,108) - (50,524) 6,206 (2,122,001) Liability deferred tax OCI and Equity (109,874) - 2,930 (663) (187) (107,794) Net Deferred Tax (1,894,449) (293,108) 2,930 (51,187) 6,019 (2,229,795) December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Liability Deferred Tax: Property and equipment (233,550) 16,225 26,005 (243,330) Lease restatement (455,610) 242,251 - (213,359) Deterioration assessment (6,412) 4,923 373,689 (375,178) Participatory titles evaluation (121,210) 40,084 58,837 (139,963) Derivatives' evaluation (56,726) - 121,744 (178,470) Goodwill (758,888) 18,818 118,779 (858,849) Properties received in payment (47,509) 2,563 32,097 (77,043) Other deductions (104,670) 76,659 7,798 (35,809) Total Liability Deferred Tax: (1,784,575) 401,523 738,949 (2,122,001) December 31, 2017 Implementation Increase December 31, 2018 In millions of Colombian pesos Liability Deferred Tax Employee Benefits (4,401) 721 237 (3,917) Investments evaluation (105,473) 14,247 4,057 (95,283) Investments in associates. Adjustment for equity method - - 663 (663) IFRS 9 implementation adjustment (1)(2) - - 7,931 (7,931) Total Liability Deferred Tax: (109,874) 14,968 12,888 (107,794) (1) Value recorded against retained earnings, not other comprehensive income (ORI) (2) Effect on Grupo Agromercantil Holding due to an increase in the investments evaluation Total deferred tax Deferred tax summary in balance sheet accounts December 31, 2017 With effects on Results With effects on ORI and Retained Profits Eliminations Reclassifications December 31, 2018 In millions of Colombian pesos Asset Deferred Tax: 602,865 127,463 435,826 (5,752) 22,275 1,182,677 Liability Deferred Tax (1,894,449) (293,108) 2,930 (51,187) 6,019 (2,229,795) Net Deferred Tax (1,291,584) (165,645) 438,756 (56,939) 28,294 (1,047,118)
Reconciliation of accounting profit multiplied by applicable tax rates [Text Block]	11.3.5. Reconciliation of the effective tax rate Reconciliation of the tax rate December 31, 2018 December 31, 2017 December 31, 2016 In millions of Colombian pesos Accounting profit 3,615,870 3,992,771 3,968,282 Applicable tax with nominal rate 1,337,872 1,597,108 1,587,313 Non-deductible expenses to determine taxable profit (loss) 266,246 356,350 255,435 Accounting and non-tax expense (income) to determine of taxable profit (loss) (168,134) (179,605) (217,056) Base Differences 486,193 341,828 (348,985) Fiscal and non-accounting expense (income) to determine of taxable profit (loss) (1) (579,660) (23,844) 23,381 Ordinary activities income exempt from taxation (235,560) (181,406) (121,917) Ordinary activities income not constituting income or occasional tax gain (133,211) (130,272) (111,027) Tax deductions (25,398) (184,620) (107,083) Goodwill Depreciation (218,277) (233,004) - Tax depreciation surplus (118,046) (177,936) (20,323) Tax rate effect in other countries (2) (92,125) (218,785) 72,144 Prior fiscal terms (146,837) 3,967 2,519 Other effects of the tax rate by reconciliation between accounting profit and tax expense (income) 456,372 268,817 162,431 Total tax 829,435 1,238,598 1,176,832
Disclosure of Detailed Information about Reconcialation on Contingent Tax Liabilities [Table Text Block]	For the Consolidated Financial Statements as of December 31, 2017 and 2018, the Bancolombia Group, once the tax positions adopted in the statements subject to review by the tax authority were analyzed, considered it necessary to reverse and update the uncertain positions in accordance with the administrative acts undertaking during the year: Balance December 2017 Update Payments Reversal Balance December 2018 353,338 13,606 156,953 95,023 114,968
Disclosure Of Detailed Information About Tax Credit Carry forwards [Text Block]	The following is the detail of the fiscal losses and presumptive income excesses over net income in the Group's entities, which have not been used, as of December 31, 2018. Base Deferred tax recognized asset In millions of Colombian pesos 224,817 74,190
Disclosure of Detailed Information About Rate of income and supplementary taxes [Table Text Block]	a) For financial institutions, the rate of income and supplementary taxes is modified and some points are added to the general rate, when the taxable income is equal to or greater than 120,000 TVU (Tax value unit) , as follows: Income tax and complementary 2019 2020 2021 2022 onwards Rate 33% 32% 31% 30% Additional points 4% 3% 3% 0% Total rate 37% 35% 34% 30%

ASSETS HELD FOR SALE AND INVE_2

ASSETS HELD FOR SALE AND INVENTORIES, NET (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of Assets Held For Sale And Inventories [Abstract]
Disclosure of Assets Held For Sale And Inventories [text block]	The breakdown of inventories and assets held for sale, net of the Bank is as follows: Assets held for sale and inventories December 31, 2018 December 31, 2017 In millions of COP Inventories, net 290,605 164,516 Assets held for sale 345,423 212,487 Total inventories and assets held for sale, net 636,028 377,003
Disclosure of inventories [text block]	The Bank's inventories at December 31, 2018 and 2017, are summarized as follows: Inventories December 31, 2018 December 31, 2017 In millions of COP Lands and buildings 250,543 117,339 Vehicles 41,853 45,741 Machinery 20,527 16,252 Total inventory cost 312,923 179,332 Impairment (22,318) (14,816) Total inventories, net 290,605 164,516
Disclosure of Assets Held For Sale By Operating Segment [Text Block]	The total balance of assets held for sale, by operating segment, are detailed below: As of December 31, 2018 Assets held for sale Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Others Segment Total In millions of COP Machinery and equipment 2,696 2,860 - - - 5,556 Cost 3,065 3,090 - - - 6,155 Impairment (369) (230) - - - (599) Real estate for residential purposes 29,562 59,241 1,762 1,487 - 92,052 Cost 30,472 61,286 1,800 1,487 - 95,045 Impairment (910) (2,045) (38) - - (2,993) Real estate different from residential properties 452 23,624 - - - 24,076 Cost 998 23,822 - - - 24,820 Impairment (546) (198) - - - (744) Investments held for sale - - - - 19,128 19,128 Cost (1) - - - - 19,128 19,128 Impairment - - - - - - Assets related to Investments held for sale - - - - 204,611 204,611 Cost (2) - - - - 209,002 209,002 Impairment (3) - - - - (4,391) (4,391) Total assets held for sale 32,710 85,725 1,762 1,487 223,739 345,423 (1) In December 2017, the management launched the execution of a sale plan for the investments associated with Avefarma S.A.S, Glassfarma Tech S.A.S. and Panamerican Pharmaceutical Holding Inc., for this reason the investments are presented as "non-current assets held for sale". Management is still committed to a plan to sell the aforementioned investments. (2) These assets corresponded to Arrendamiento Operativo CIB S.A.C. and FiduPerú S.A. Sociedad Fiduciaria. (3) In September 2018, FiduPerú S.A. returned capital to its shareholders. At the end of the 2018 period, the Administration adjusted the book value of the asset based on the fair value of the company, recognizing an impairment in the Income Statement. As of December 31, 2017 Assets held for sale Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Others Segment Total In millions of COP Machinery and equipment 8,099 3,362 - 39 - 11,500 Cost 8,972 3,422 - 39 - 12,433 Impairment (873) (60) - - - (933) Real estate for residential purposes 8,346 12,257 2,586 665 - 23,854 Cost 8,431 12,859 2,645 885 - 24,820 Impairment (85) (602) (59) (220) - (966) Real estate different from residential properties 295 952 - 155 - 1,402 Cost 295 952 - 178 24 1,449 Impairment - - - (23) (24) (47) Investments held for sale - - - - 18,413 18,413 Cost (1) - - - - 18,413 18,413 Impairment - - - - - - Assets related to Investments held for sale - - - - 157,318 157,318 Cost (2) - - - - 157,318 157,318 Impairment - - - - - - Total assets held for sale 16,740 16,571 2,586 859 175,731 212,487
Disclosure of detailed information about assets and liabilities classified as held for sale [Table Text Block]	The breakdown of the major classes of assets and liabilities classified as held for sale is as follows: December 31, 2018 December 31, 2017 In millions of COP Assets Cash and cash equivalents 12,476 19,072 Financial assets investment - 2,486 Premises and equipment, net 164,356 109,469 Prepaid expenses 412 101 Tax receivables 7,093 8,028 Deferred tax 1,551 1,103 Assets held for sale 721 4,691 Other assets 22,393 12,368 Total assets (1) 209,002 157,318 Liabilities Borrowings from other financial institutions 150,254 90,109 Tax liabilities 1,054 611 Deferred tax liabilities 4,832 4,908 Other liabilities 7,456 7,348 Total liabilities 163,596 102,976

OTHER ASSETS, NET (Tables)

OTHER ASSETS, NET (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Other Assets [Abstract]
Disclosure of detailed information about other assets [Text Block]	As of December 31, 2018 and 2017 the Bank’s other assets, net consist of: Other Assets December 31, 2018 December 31, 2017 In millions of COP Tax advance 867,120 480,523 Marketable and non-marketable for sale assets 654,207 580,438 Prepaid expenses 346,012 287,550 Other receivables (1) 286,583 200,645 Assets pledged as collateral 253,546 192,036 Receivables related to abandoned accounts (2) 172,671 147,228 Receivable Sales of goods and service 141,098 117,540 Commission receivables 99,185 97,710 Accounts receivable from contracts with customers (3) 86,759 90,590 Balance in credit card clearning house 61,539 66,788 Interbank Borrowings not classified as cash equivalents 55,690 125,963 Operating leases 55,450 38,653 Commission for letters of credit 25,399 72,927 Debtors 22,054 10,510 Taxes receivable 4,882 7,199 Others 166,125 34,498 Total other assets 3,298,320 2,550,798 Allowance others (64,139) (71,761) Total other assets, net 3,234,181 2,479,037 (1) As of December 31, 2018, corresponds to reconciling items on correspondent banks and mortgage-backed securities´ interest. (2) The item corresponds to receivables related to the application of the Colombian Law 1777 of February 1, 2016, which establishes that entities holding accounts deemed abandoned must transfer the related amounts to a fund constituted and regulated by the Icetex (Governmental entity responsible for promoting high quality education in Colombia). (3) See Note 24.3 Fees and commissions.

DEPOSITS FROM CUSTOMERS (Tables

DEPOSITS FROM CUSTOMERS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Deposits From Customers [Abstract]
Disclosure of detailed information about deposits [Text Block]	The detail of the deposits as of December 31, 2018 and 2017 is as follows: Deposits December 31, 2018 December 31, 2017 In millions of COP Saving accounts 59,635,379 54,255,583 Time deposits 56,853,141 53,961,586 Checking accounts 24,098,073 22,065,647 Other deposits 1,541,878 1,676,399 Total 142,128,471 131,959,215
Disclosure of deposits from banks [text block]	The following table details the time deposits (‘CDT’) issued by the Bank: CDT Effective interest rate December 31, 2018 Modality Minimum Maximum Carrying Value Fair value In millions of COP Less than 6 months 0.10% 6.75% 9,549,206 9,554,429 Equal to 6 months and less than 12 months 0.25% 7.50% 5,572,051 5,577,962 Equal to 12 months and less than 18 months 0.25% 7.25% 7,323,840 7,368,860 Equal to or greater than 18 months 0.01% 13.50% 34,408,044 35,084,415 Total 56,853,141 57,585,666 CDT Effective interest rate December 31, 2017 Modality Minimum Maximum Carrying Value Fair value In millions of COP Less than 6 months 0.10% 6.96% 7,536,280 7,535,719 Equal to 6 months and less than 12 months 0.20% 8.03% 5,711,157 5,718,827 Equal to 12 months and less than 18 months 0.20% 9.03% 8,062,290 8,146,366 Equal to or greater than 18 months 0.01% 18.29% 32,651,859 33,381,189 Total 53,961,586 54,782,101
Disclosure of detailed information about maturity period of CDT's issued by the bank [Text Block]	The detail of CDT’s issued by the Bank by maturity is as follows: December 31, 2018 Period Carrying value Fair value In millions of COP Less than one year 37,911,658 38,216,970 1 to 3 years 12,753,264 12,965,241 3 to 5 years 4,559,122 4,663,087 More than 5 years 1,629,097 1,740,368 Total 56,853,141 57,585,666 December 31, 2017 Period Carrying value Fair value In millions of COP Less than one year 36,416,439 36,701,555 1 to 3 years 10,525,956 10,727,828 3 to 5 years 5,367,765 5,592,750 More than 5 years 1,651,426 1,759,968 Total 53,961,586 54,782,101

INTERBANK DEPOSITS AND REPURC_2

INTERBANK DEPOSITS AND REPURCHASE AGREEMENTS AND OTHER SIMILAR SECURED BORROWING (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of interbank deposits and repurchase agreements and other similar secured borrowing [Abstract]
Disclosure of detailed information about money market operations recognized as liabilities [Text Block]	The following table sets forth information regarding the money market operations recognized as liabilities in the statement of financial position: Interbank and repurchase agreements and other similar secured borrowing December 31, 2018 December 31, 2017 In millions of COP Interbank Deposits Interbank liabilities 1,374,222 1,084,591 Total interbank 1,374,222 1,084,591 Repurchase agreements and other similar secured borrowing Short selling operations 136,786 607,536 Temporary transfer of securities 2,178,769 2,628,592 Total Repurchase agreements and other similar secured borrowing (1) 2,315,555 3,236,128 Total money market transactions 3,689,777 4,320,719 (1) Total repo liabilities have maturities of less than 30 days.
Disclosure of detailed information about repurchases and resale transactions [Text Block]	The table below presents repurchases and resale transactions included in the consolidated statement of financial position at December 31, 2018 and 2017: As of December 31, 2018 Assets / liabilities gross Amounts offset in the statement of financial position Net balance presented in the statement of financial position Financial instruments as collaterals Assets / liabilities net In millions of COP Securities purchased under resale agreements (1) 931,820 - 931,820 (931,820) - Securities sold under repurchase agreements (2,315,555) - (2,315,555) 2,315,555 - Total repurchase and resale agreements (1,383,735) - (1,383,735) 1,383,735 - (1) The amount includes those presented as cash and cash equivalents and those presented as other assets. As of December 31, 2017 Assets / liabilities gross Amounts offset in the statement of financial position Net balance presented in the statement of financial position Financial instruments as collaterals Assets / liabilities net In millions of COP Securities purchased under resale agreements (1) 881,061 - 881,061 (881,061) - Securities sold under repurchase agreements (3,236,128) - (3,236,128) 3,236,128 - Total repurchase and resale agreements (2,355,067) - (2,355,067) 2,355,067 - (1) The amount includes those presented as cash and cash equivalents and those presented as other assets.

BORROWINGS FROM OTHER FINANCI_2

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Borrowings Explanatory [Abstract]
Disclosure of detailed information about borrowings [text block]	As of December 31, 2018 and 2017, the composition of the borrowings from other financial institutions measured at amortized cost is the following: Borrowings from other financial institutions December 31, 2018 December 31, 2017 In millions of COP Obligations granted by foreign banks (1) 11,217,308 7,958,450 Obligations granted by domestic banks 5,120,656 5,863,702 Total 16,337,964 13,822,152 (1) The Bank has recognized a financial liability with BAM Financial Corporation (BFC) amounting to USD 259.4 million as of December 31, 2018 and USD 243.2 million as of December 31, 2017, due to its obligation to pay cash in future to purchase the non-controlling shares of Grupo Agromercantil Holding pursuant to an outstanding put option expiring in 2024. The Bank will reclassify the liability to equity if the put expires unexercised.
Disclosure of detailed information about Obligations granted by domestic banks [Text Block]	Obligations granted by domestic banks As of December 31, 2018 Financial entity Rate Maximum Rate Minimum December 31, 2018 In millions of COP Financiera de desarrollo territorial (Findeter) 10.19% 0.24% 2,591,423 Banco de comercio exterior de Colombia (Bancoldex) 15.46% 2.17% 1,205,958 Fondo para el financiamiento del sector agropecuario (Finagro) 14.54% 0.85% 634,048 Other private financial entities 7.92% 5.82% 689,227 Total 5,120,656 As of December 31, 2017 Financial entity Rate Maximum Rate Minimum December 31, 2017 In millions of COP Financiera de desarrollo territorial (Findeter) 11.30% 1.05% 2,587,598 Banco de comercio exterior de Colombia (Bancoldex) 10.86% 1.76% 1,528,435 Fondo para el financiamiento del sector agropecuario (Finagro) 14.90% 1.05% 728,558 Other private financial entities 8.89% 0.07% 1,019,111 Total 5,863,702
Disclosure of detailed information about maturities of financial obligations with domestic banks [Text Block]	The maturities of financial obligations with domestic banks as of December 31, 2018 and 2017, are the following: Domestic December 31, 2018 December 31, 2017 In millions of COP Amount expected to be settled: More than twelve months after the reporting period 4,894,259 5,288,364 No more than twelve months after the reporting period 226,397 575,338 Total 5,120,656 5,863,702
Disclosure of detailed information about Obligations granted by foreign banks [Text Block]	Obligations granted by foreign banks As of December 31, 2018 Financial entity Rate Maximum Rate Minimum December 31, 2018 In millions of COP Financing with correspondent banks 5.66% 2.81% 10,140,356 Corporación Andina de Fomento (CAF) 5.01% 2.93% 529,464 Banco Latinoamericano de Comercio Exterior (Bladex) 4.89% 3.15% 473,549 Banco Interamericano de Desarrollo (BID) 5.64% 4.32% 73,939 Total 11,217,308 As of December 31, 2017 Financial entity Rate Maximum Rate Minimum December 31, 2017 In millions of COP Financing with correspondent banks 5.66% 1.48% 7,341,713 Corporación Andina de Fomento (CAF) 3.84% 1.85% 311,730 Banco Latinoamericano de Comercio Exterior (Bladex) 4.10% 1.90% 269,946 Banco Interamericano de Desarrollo (BID) 3.96% 3.96% 35,061 Total 7,958,450
Disclosure of detailed information about maturities of financial obligations with foreign banks [Text Block]	The maturities of the financial obligations with foreign entities as of December 31, 2018 and 2017 are the following: Foreign December 31, 2018 December 31, 2017 In millions of COP Amount expected to be settled: No more than twelve months after the reporting period 9,743,905 7,037,043 More than twelve months after the reporting period 1,473,403 921,407 Total 11,217,308 7,958,450

DEBT SECURITIES IN ISSUE (Table

DEBT SECURITIES IN ISSUE (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of debt securities in issue [Abstract]
Disclosure of detailed information about bonds issued to different entities [text block]	Duly authorized by the authority in each country bonds have been issued as follows: As of December 31, 2018 Issuer Currency Face value (2) Balance Rate Range Bancolombia S.A. Local COP 4,533,392 4,607,153 IPC (1) Bancolombia S.A. Foreign USD 3,237,466 10,452,432 2.60%-6.22%% Banco Agrícola S.A. Foreign USD 547,000 1,774,852 5.27%-7.17% Bancolombia Panamá S.A. Foreign USD 139,280 457,495 2.60%-3.50% Grupo Agromercantil Holding S.A. Foreign USD 300,939 986,476 0.25%-7.25% Banismo S.A. y filiales Foreign USD 606,635 1,980,824 2.65%-5.00% Bancolombia Puerto Rico Internacional Inc Foreign USD 8,499 28,001 2.70%-3.00% Total 20,287,233 (1) Consumer price index. (2) Face value is in US dollar for foreign currency bonds. As of December 31, 2017 Issuer Currency Face value (2) Balance Rate Range Bancolombia S.A. Local COP 5,162,515 5,247,501 5.59%-IPC (1) Bancolombia S.A. Foreign USD 3,242,405 9,532,927 1.90%-6.31% Banco Agrícola S.A. Foreign USD 547,000 1,622,238 5.36%-7.99% Bancolombia Panamá S.A. Foreign USD 260,310 784,567 1.90%-2.90% Grupo Agromercantil Holding S.A. Foreign USD 302,264 910,270 0.25%-7.25% Banismo S.A. y filiales Foreign USD 519,300 1,551,211 2.65%-3.65% Total 19,648,714 (1) Consumer price index. (2) Face value is US dollar for foreign currency bonds.
Disclosure of detailed information about breakdown of the Bank securities in issue by maturity [text block]	The breakdown of the Bank securities in issue by maturity is as follows: As of December 31, 2018 Issuer Less than a year 1 to 3 years 3 to 5 years more than 5 years Total amortized cost In millions of COP Local currency Subordinated bonds (1) - - - 1,425,034 1,425,034 Ordinary bonds - - 154,813 3,027,306 3,182,119 Foreign currency Subordinated bonds (1) - - - 6,790,506 6,790,506 Ordinary bonds 652,579 339,419 159,721 7,737,855 8,889,574 Total 652,579 339,419 314,534 18,980,701 20,287,233 (1) The subordinated bonds, in the event of default of the Bank, will be subordinated to the claims of depositors and all other creditors of the issuer, other than creditors whose claims rank equally with, or are junior to, the claims of the holders of the subordinated liabilities. As of December 31, 2017 Issuer Less than a year 1 to 3 years 3 to 5 years more than 5 years Total amortized cost In millions of COP Local currency Subordinated bonds (1) - - 163,778 2,410,209 2,573,987 Ordinary bonds - - 802 2,672,712 2,673,514 Foreign currency Subordinated bonds (1) - - - 6,156,094 6,156,094 Ordinary bonds 535,020 758,879 44,740 6,906,480 8,245,119 Total 535,020 758,879 209,320 18,145,495 19,648,714 (1) The subordinated bonds, in the event of default of the Bank, will be subordinated to the claims of depositors and all other creditors of the issuer, other than creditors whose claims rank equally with, or are junior to, the claims of the holders of the subordinated liabilities.
Disclosure of detailed information about debt securities in issue by maturity [text block]	The following is a schedule of the debt instruments in issue by maturity: Issuer December 31, 2018 December 31, 2017 In millions of COP Amount expected to be settled: No more than twelve months after the reporting period 2,854,161 2,352,801 More than twelve months after the reporting period 17,433,072 17,295,913 Total 20,287,233 19,648,714

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of employee benefit plans [Line Items]
Disclosure of detailed information about post-employment benefit plans [Text Block]	The following table shows liabilities relating to post-employment benefit plans: Post-employment and long-term benefit plans December 31, 2018 December 31, 2017 In millions of COP Defined benefit pension plan 128,246 131,589 Severance obligation 30,732 38,041 Retirement Pension Premium Plan and Senior Management Pension Plan Premium 120,966 119,526 Other long term benefits 439,321 408,245 Post-employment and long-term benefit plans 719,265 697,401
Disclosure of defined benefit plans [text block]	Short-term employment benefit plans recognized in the Statement of Financial Position in the line “Other liabilities” consist of the following: Other employment benefit plans December 31, 2018 December 31, 2017 In millions of COP Current severance obligation (1) 113,654 106,334 Other bonuses and short-term benefits 351,697 336,285 Other employment benefit plans 465,351 442,619 (1) See severance obligation
Disclosure of detailed information about periodic net cost of plans previously mentioned and charges credits recognized in consolidated statement of income [Text Block]	The components of the periodic net cost of the plans previously mentioned and the total of charges (credits) recognized in the Consolidated Statement of Income are as follows: Banistmo asset plan December 31, 2018 December 31, 2017 In millions of COP Employee pension plan 4,884 4,765 Total 4,884 4,765
Disclosure of detailed information about change in plan assets [Text Block]	The following table details the change in plan assets: 2018 2017 In millions of COP Fair value of assets as of January 1 4,765 5,565 Interest income on plan assets 161 123 Return on plan assets greater/(less) than discount rate (33) (58) Benefits paid (405) (825) Foreign currency translation effect 396 (40) Fair value assets as of December 31 4,884 4,765
Disclosure of detailed information about expense recognized in Salaries and employee benefits [Text Block]	The expense recognized in the line “Salaries and employee benefits” of the Consolidated Statement of Income for defined contribution plans, for current severance regimen and pension benefits, is as follows: Defined contribution plans 2018 2017 In millions of COP Pension 182,991 171,713 Current severance regimen 57,130 54,510 Total 240,121 226,223
Disclosure of additional information about defined benefit plans [text block]	The economic assumptions used in the determination of the present value of the defined benefit plans, in nominal terms, are as follows: Colombia Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 6.90% 6.60% Rate of wage increase 5.70% 7.00% Projected inflation 3.40% 4.00% Bancolombia Panama Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 4.00% 3.00% Rate of wage increase 2.00% 3.00% Projected inflation 1.00% 2.00% Banistmo Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 4.00% 3.00% Expected long-term rate of return on plan assets 2.30% 2.10% Rate of wage increase 3.00% 3.00% El Salvador Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 4.10% 3.60% Rate of wage increase 2.50% 2.50% Projected inflation 1.50% 1.50% Guatemala Main projected assumptions December 31, 2018 December 31, 2017 Discount rate 8.20% 8.20% Rate of wage increase 5.00% 5.00% Projected inflation 4.00% 4.00%
Disclosure of information about maturity profile of defined benefit obligation [text block]	The payments of benefits, which reflect future service rendered, are considered to be paid as follows: Years Pension Benefits Other benefits In millions of COP 2019 12,741 58,498 2020 12,820 52,205 2021 12,819 60,941 2022 12,723 67,609 2023 12,556 65,015 2024 to 2028 58,018 319,002
Fair Value Of Plan Assets Table Text Block [Table Text Block]	The plan assets’ fair value as of December 31, 2018 is as follow: Bancolombia's asset plan 2018 2017 In millions of COP Retirement Pension Premium Plan 32,252 - Total 32,252 - 2018 2017 In millions of COP Fair value of assets as of January 1, - Employer contributions 32,252 - Fair value assets at the end of the year 32,252 -
Pension plan premium [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Retirement Pension Premium Plan Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (4,815) Discount rate 6.40% 0.50% decrease 5,318 Salary increases 6.50% 0.50% increase 5,370 Salary increases 5.50% 0.50% decrease (4,922)
Pension plan premium [Member] | Banistmo S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Pension Plan Banistmo Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.50% 0.50% increase (261) Discount rate 3.50% 0.50% decrease 283 Mortality Table RP-2000 One year increase in life expectancy 182
Guatemala [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Guatemala Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 8.70% 0.50% increase (24,380) Discount rate 7.70% 0.50% decrease 29,625 Salary increases 5.50% 0.50% increase 28,711 Salary increases 4.50% 0.50% decrease (25,119) Mortality Table RP-2000 One year increase in life expectancy 27,661
Pension plan [member]
Disclosure of employee benefit plans [Line Items]
Disclosure of defined benefit plans [text block]	Unfunded defined benefit pension plan of the Parent Company 2018 2017 In millions of COP Present value of the obligation as of January 1 125,480 123,282 Interest cost 7,547 8,117 Benefits paid (11,795) (11,553) Net actuarial (gain) / loss due to changes in demographic assumptions (2,220) 2,216 Net actuarial (gain) / loss due to plan experience 3,371 3,418 Defined obligation, unfunded as of December 31 122,383 125,480 Funded defined benefit pension plan of Banistmo 2018 2017 In millions of COP Present value of the obligation as of January 1 6,109 6,649 Interest cost 177 198 Actuarial (gain)/loss – experience (536) 68 Actuarial (gain)/loss - financial assumptions 46 61 Benefits paid from plan assets (405) (825) Foreign currency translation effect 472 (42) Defined obligation, unfunded as of December 31 5,863 6,109
Pension plan [member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Pension plan Bancolombia Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (4,342) Discount rate 6.40% 0.50% decrease 4,649 Salary increases 4.00% 0.50% increase 5,065 Salary increases 3.00% 0.50% decrease (4,763) Mortality Table RV-08 ("Rentistas Validos") One year increase in life expectancy 4,966
Severance obligation [member]
Disclosure of employee benefit plans [Line Items]
Disclosure of defined benefit plans [text block]	The balances recognized in the Statement of Financial Position are listed below: Defined benefit severance obligation plan 2018 2017 In millions of COP Present value of the obligation as of January 1 38,041 51,289 Current cost of service 1,598 2,562 Interest cost 2,333 3,419 Benefits paid (11,586) (11,298) Net actuarial loss/ (gain) due to assumption changes and plan experience 346 (7,931) Defined obligation, unfunded as of December 31 30,732 38,041 Current severance regimen 113,654 106,334 Total severance 144,386 144,375
Severance obligation [member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Severance obligation Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (755) Discount rate 6.40% 0.50% decrease 787 Salary increases 6.50% 0.50% increase 1,785 Salary increases 5.50% 0.50% decrease (1,734)
Retirement and senior management pension plan [member]
Disclosure of employee benefit plans [Line Items]
Disclosure of defined benefit plans [text block]	The annual change of the present value of the obligations of defined benefit plans is as follows: Retirement Pension Premium Plan and Senior Management Pension Plan Premium 2018 2017 In millions of COP Present value of the obligation as of January 1 119,526 105,158 Current service cost 8,294 7,294 Interest cost 7,391 6,881 Benefits paid (6,590) (1,224) First time application effect of IAS 19 to new defined benefit obligation of Transportempo at December 31, 2017 (1) - 237 First time application effect of IAS 19 to new defined benefit obligation of Banistmo at December 31, 2018 (2) 2,479 - First time application effect of IAS 19 to new defined benefit obligation of Banagrícola at December 31, 2018 (3) 821 - Net actuarial (gain) / loss due to assumption changes and plan experience (4) (11,272) 1,195 Foreign currency translation effect 317 (15) Defined obligation, unfunded as of December 31 120,966 119,526 (1) Pursuant to a private agreement reached between Transportempo and its employees, the Bank’s subsidiary has decided to recognize a new employee benefit plan based on the employees’ seniority and their current salary at the moment when the service is vested. (2) Banistmo S.A has decided to recognize a new employee benefit plan for its senior management executives based on the number of years of service to the organization. (3) Banagrícola S.A has decided to recognize a new employee benefit plan for its senior management executives based on the number of years of service to the organization. (4) The increase in actuarial gains from experience adjustment is mainly due to a greater than expected reduction in the number of the Bank’s participants in the pension premium plan during the yaer ended as of December 31, 2018
Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Senior Management Pension Plan Premium Banagricola Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.60% 0.50% increase (26) Discount rate 3.60% 0.50% decrease 27 Salary increases 3.00% 0.50% increase 27 Salary increases 2.00% 0.50% decrease (26)
Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Senior Management Pension Plan Premium Banistmo Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.50% 0.50% increase (90) Discount rate 3.50% 0.50% decrease 95 Salary increases 3.50% 0.50% increase 94 Salary increases 2.50% 0.50% decrease (91)
Senior Management Pension Plan Premium [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Senior Management Pension Plan Premium Bancolombia Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (913) Discount rate 6.40% 0.50% decrease 959 Salary increases 6.50% 0.50% increase 956 Salary increases 5.50% 0.50% decrease (919)
Other long term benefits [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of defined benefit plans [text block]	In addition to legal benefits and the aforementioned post-employment benefits, the Bank grants to its employees other benefits based on the employees’ seniority. For the periods ended December 31, 2018 and December 31, 2017, the reconciliation of the other long term benefits is set below: Other long term benefits 2018 2017 In millions of COP Present value of the obligation as of January 1 408,245 364,424 Current service cost 41,512 37,433 Interest cost 26,152 26,329 Benefits paid (45,104) (38,671) Unfunded benefit obligation assumed for Grupo Agromercantil at December 31, 2017 (1) - 340 First time application effect of IAS 19 to new defined benefit obligation of Renting at December 31, 2017 (2) - 614 Loss due to assumption changes and plan experience 4,360 16,893 Foreign currency translation effect 4,156 883 Defined obligation, unfunded as of December 31 439,321 408,245 (1) Former employees have been incorporated again in the Company’s payroll due to the private agreement reached between Comamesa (a Guatemalan subsidiary of Grupo Agromercantil and Serviva (security supplier). (2) Pursuant to a private agreement reached between Renting and its employees, the Bank’s subsidiary has decided to recognize a new employee benefit plan based on the employees’ seniority and their current salary at the moment when the service is vested.
Other long term benefits [Member] | Colombia [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	Colombia Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 7.40% 0.50% increase (11,938) Discount rate 6.40% 0.50% decrease 12,762 Salary increases 6.50% 0.50% increase 12,800 Salary increases 5.50% 0.50% decrease (12,084)
Other long term benefits [Member] | EL SALVADOR [Member]
Disclosure of employee benefit plans [Line Items]
Disclosure of sensitivity analysis for actuarial assumptions [text block]	El Salvador Assumption Value (Increase/Decrease) Effect on DBO In millions of COP Discount rate 4.60% 0.50% increase (656) Discount rate 3.60% 0.50% decrease 712 Salary increases 3.00% 0.50% increase 112 Salary increases 2.00% 0.50% decrease (145)

OTHER LIABILITIES (Tables)

OTHER LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Other Liabilities Explanatory [Abstract]
Disclosure of detailed information about other liabilities [Text Block]	Other liabilities consist of the following: Other liabilities December 31, 2018 December 31, 2017 In millions of COP Payables 1,638,010 1,838,806 Suppliers 1,386,809 1,254,484 Advances (1) 1,043,611 393,007 Collection services 884,805 377,288 Employee benefits and bonuses (2) 351,697 336,285 Security contributions 341,872 356,498 Dividends (3) 267,468 16,182 Salaries and other labor obligations 265,337 245,369 Advances in leasing operations and loans 133,377 171,421 Liabilities from contracts with customers (4) 75,845 118,857 Provisions (5) 63,474 84,294 Deferred interests 44,598 84,824 Other (6) 271,350 519,167 Total 6,768,253 5,796,482 (1) For the year 2018 and 2017 advances includes the amount received by the Bank in balances related to insurance operations amounting to COP 67,136 and COP 54,967, respectively, balances held by court order amounting to COP 62,861 and COP 50,152, respectively, gain on derivatives first day valuation amounting to COP 55,573 and COP 39,706, respectively, excess cash amounting to COP 5,161 and COP 9,012, respectively and balances of credit cards charges pending to be applied amounting to COP 7,214 and COP 10,116. Additionally, for the year 2018, the line includes guaranteed deposits for capital market transactions in foreign currency for COP 459,966. (2) For further information related to other employee benefit plans, see Note 18 "Employees benefit plans". (3) The increase is due to the last installement payment effective for the dividends approved by the annual shareholders’ meeting that took place in 2018. (4) See Note. 24.3 " Fees and commissions" (5) See Note 20 "Provisions and contingent’s liabilities". (6) For further information see Note 11 “Income tax”

PROVISIONS AND CONTINGENT LIA_2

PROVISIONS AND CONTINGENT LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Provisions And Contingent Liabilities [Abstract]
Disclosure of provisions [text block]	The following tables show the detail of the provisions: As of December 31, 2018 Judicial proceedings Administrative proceedings Financial ‎ guarantees (1) loan ‎ commitments (1) Onerous contracts Total In millions of COP Balance at December 31, 2017 30,412 1,592 52,290 99,500 - 183,794 Effect of adoption of IFRS 9 - - (3,215) (8,574) - (11,789) Balance at January 1, 2018 30,412 1,592 49,075 90,926 - 172,005 Additions recognized in the year 22,281 7,272 7,708 21,922 2,759 61,942 Provisions used during the period (6,489) - (5) - - (6,494) Provisions reversed during the period (10,177) (8,395) (33,686) (13,713) - (65,971) Foreign currency translation adjustment 606 - 8 5,424 274 6,312 Effect of discounted cash flows 239 - - - - 239 Final balance at December 31, 2018 36,872 469 23,100 104,559 3,033 168,033 (1) The provisions for financial guarantees and loan commitments as of December 31, 2018 were estimated according to the expected credit losses methodology required by IFRS 9, on the other hand, the estimations for the year ended as of December 31, 2017 were computed under IAS 39, therefore both amounts are not comparable. For further information see Note 32 Impacts on application of new standards. As of December 31, 2017 Judicial proceedings Administrative proceedings Financial guarantees loan commitments Total In millions of COP Balance at January 1, 2017 29,135 1,312 77,366 100,748 208,561 Additions recognized in the year 23,396 302 55,539 27,198 106,435 Provisions used during the period (10,623) - - - (10,623) Provisions reversed during the period (11,504) - (80,615) (28,127) (120,246) Foreign currency translation adjustment (90) - - (319) (409) Effect of discounted cash flows 98 (22) - - 76 Balance at December 31, 2017 30,412 1,592 52,290 99,500 183,794
Disclosure of commitments [text block]	The amount guaranteed should be reimbursed to the beneficiary of the guarantee in case of breach of agreed covenants by the customer guaranteed or upon its financial insolvency. As of December 31, 2018 Maturity Financial Guarantees In millions of COP Guarantees under 1 month 303,308 Guarantees greater than 1 month and up to 3 months 780,103 Guarantees greater than 3 months and up to 1 year 2,287,434 Guarantees greater than 1 year and up to 3 years 1,426,992 Guarantees greater than 3 year and up to 5 years 277,710 Guarantees greater than 5 years 177,828 Total 5,253,375 As of December 31, 2017 Maturity Financial Guarantees In millions of COP Guarantees under 1 month 960,268 Guarantees greater than 1 month and up to 3 months 1,230,687 Guarantees greater than 3 months and up to 1 year 2,946,250 Guarantees greater than 1 year and up to 3 years 1,224,061 Guarantees greater than 3 year and up to 5 years 149,238 Guarantees greater than 5 years 191,139 Total 6,701,643
Provisions For Financial Guarantees And Loan Commitments Table Text Block [Text Block]	The following explains the significant changes in the provisions of financial guarantees and loan commitments during period at December 31, 2018 which were estimated using the expected credit loss model required by IFRS 9 (2014): Stage 1 Stage 2 Stage 3 TOTAL Balance at January 1, 2018 125,189 14,502 310 140,001 Net remeasurement of loss allowance (24,851) 3,239 17,602 (4,010) Transfer 12-month ECL (16,727) (20,644) (3,528) (40,899) Transfer Lifetime ECL not credit-impaired (5,216) 33,702 (7,769) 20,717 Transfer Lifetime ECL credit-impaired (2,908) (9,819) 28,899 16,172 Provisions used during the period 28,360 988 6,741 36,089 Provisions reversed during the period (20,459) (4,757) (24,637) (49,853) Translation adjustment 4,515 918 (1) 5,432 Balance at December 31, 2018 112,754 14,890 15 127,659
Disclosure Of Contingent liabilities Table text Block [Text Block]	The following contingencies listed below are contingencies reported as of December 31, 2017 that were concluded in the Bank’s favor as of December 31, 2018: Case/Procedure Amount Termination/Decision Miles of USD Revocatory Action claim by Interbolsa S.A. Comisionista de Bolsa vs. Bancolombia 4,308 In Bancolombia’s favor

CAPITAL (Tables)

CAPITAL (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Capital [Abstract]
Disclosure of issued capital [text block]	The subscribed and paid-in capital is the following: December 31, 2018 December 31, 2017 Authorized shares 1,400,000,000 1,400,000,000 Subscribed and paid-in shares: Ordinary shares with a nominal value of COP 500 pesos 509,704,584 509,704,584 Preferred shares with dividend without voting rights with nominal value of COP 500 pesos 452,122,416 452,122,416 Total shares 961,827,000 961,827,000 Subscribed and paid capital (nominal value) 480,914 480,914
Disclosure of dividends [text block]	The annual net profits of Bancolombia must be applied as follows: (i) first, an amount equal to 10.00% of Bancolombia’s net profits to a legal reserve until such reserve is equal to at least 50.00% of the Bank’s paid-in capital; (ii) second, to the payment of the minimum dividend on the preferred shares; and (iii) third, as may be determined in the ordinary annual stockholders’ meeting by the vote of the holders of a majority of the shares entitled to vote. Dividends declared with respect to net income earned in: Cash dividends per share (Stated in COP) 2018 1,092 2017 1,020 2016 950 2015 888 2014 830 2013 776

APPROPRIATED RESERVES (Tables)

APPROPRIATED RESERVES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Appropriated Reserves [Abstract]
Disclosure of reserves within equity [text block]	As of December 31, 2018 and December 31, 2017 the appropriated retained earnings consist of the following Concept December 31, 2018 December 31, 2017 In millions of COP Appropriation of net income (1) 9,312,009 8,709,922 For Fiscal provisions (2) 276,640 196,318 Others 153,125 138,915 Total Appropiated reserves 9,741,774 9,045,155 (1) The legal reserve fulfills two objetives: to increase and maintain the company's capital and to absorb economic losses. Based on the aforementioned, this amount shall not be distributed in dividends to the stockholders. (2) Pursuant to Article 130 of Tax Statute, a non-distributable reserve to the shareholders must be established for the 70% of the diference between the accounting and the tax depreciation, when the tax depreciation is greater than the accounting depreciation.

UNCONSOLIDATED STRUCTURED ENT_2

UNCONSOLIDATED STRUCTURED ENTITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of unconsolidated structured entities [abstract]
Disclosure of interests in unconsolidated structured entities [text block]	The table below shows the total assets of unconsolidated structured entities in which the Bank had an interest at the reporting date and its maximum exposure to loss in relation to those interests. As of December 31, 2018 Securitisations The Bank’s managed funds Total In millions of COP Total assets of the entities 1,969,887 128,257,719 130,227,606 The Bank’s interest-assets Investments at fair value through profit or loss 196,927 - 196,927 Investments at fair value through other comprehensive income 209,164 - 209,164 Loans and advances to customers - 5,417,235 5,417,235 Total assets in relation to The Bank’s interests in the unconsolidated structured entities 406,091 5,417,235 5,823,326 The Bank’s maximum exposure 406,091 5,417,235 5,823,326 As of December 31, 2017 Securitisations The Bank’s managed funds Total In millions of COP Total assets of the entities 2,110,967 120,320,401 122,431,368 The Bank’s interest-assets Investments at fair value through profit or loss 252,881 - 252,881 Investments at fair value through other comprehensive income 187,471 - 187,471 Loans and advances to customers - 3,626,152 3,626,152 Total assets in relation to The Bank’s interests in the unconsolidated structured entities 440,352 3,626,152 4,066,504 The Bank’s maximum exposure 440,352 3,626,152 4,066,504

OPERATING INCOME (Tables)

OPERATING INCOME (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of operating income and operating expense [Abstract]
Disclosure of interest income [text block]	The following table sets forth the detail of interest and valuation on financial asset instruments for the years ended December 31, 2018, 2017 and 2016: 2018 2017 2016 In millions of COP Debt investments, net 129,017 159,890 163,311 Net gains from investment activities at fair value through income statement Debt investments 472,357 699,841 579,403 Derivatives (22,575) (61,667) (4,750) Spot transactions (13,734) 3,517 (22,831) Repos (51,438) (116,268) (7,638) Total net gains from investment activities at fair value through profit and loss 384,610 525,423 544,184 Total Interest on investment securities 513,627 685,313 707,495
Disclosure of interest expense [text block]	The following table sets forth the detail of interest on financial liability instruments for the years ended December 31, 2018, 2017 and 2016: 2018 2017 2016 In millions of COP Deposits (3,852,061) (4,279,316) (3,878,528) Debt instruments in issue (1,139,456) (1,191,000) (1,335,192) Financial borrowings (583,321) (672,472) (723,385) Preferred shares (58,714) (58,714) (58,714) Borrowings from other financial institutions (18,134) (15,860) (6,345) Other interest (18,530) (15,624) (50,936) Interest expenses (5,670,216) (6,232,986) (6,053,100)
Disclosure of other operating income [text block]	Fees and Commissions Expenses 2018 2017 2016 in millions of COP Banking services (542,628) (508,462) (473,109) Call center and web page (309,403) (291,602) (260,006) Others (361,025) (275,051) (235,855) Expenses for commissions (1,213,056) (1,075,115) (968,970)
Disclosure of detailed information about dividends received and share of profits of equity method investees [Text Block]	The following table sets forth the detail of dividends received, and share of profits of equity method investees for the years ended December 31, 2018, 2017 and 2016: 2018 2017 2016 In millions of COP Dividends (1) 67,582 32,248 39,785 Equity investments (2) 86,399 (19,680) 77,799 Equity method (3) 187,814 253,602 60,254 Gains (Losses) on sale of Discontinued Operations - - (1,146) Total dividends received, and share of profits of equity method investees 341,795 266,170 176,692 (1) Dividends received from equity investments at fair value through profit or loss as of 31, December of 2018, 2017 and 2016 amount COP 54,477, COP 20,297 and COP 30,468, respectively. Dividends from equity investments at fair value through OCI amount COP 13,105, COP 11,951 and COP 9,317, respectively. As of December 31, 2018, 2017 and 2016, the amount includes dividends of investments derecognised for COP 950, COP 1,556 and COP 1,638, respectively. (2) As of December 31, 2018, there is a profit on capital investments due to the increase in fair value in the portfolio measured at fair value through profit or loss held by Banagricola S.A. (3) For further information, see note 7 investments in associates and joint ventures.
Disclosure of Detailed Information about contract assets and liabilities Table Text Block [Text Block]	The following table shows the detail of accounts receivable, and contract liabilities balances as at December 31, 2018 and 2017: 2018 2017 2016 in millions of COP Accounts receivable from contracts with customers (1) 86,759 90,590 57,567 Contract liabilities 75,845 118,857 34,487
Disclosure of Detailed Information about Operating Income From Revenue From Contract With Customers Table Text Block [Text Block]	The following table sets forth the detail of other operating income net for the years ended December 31, 2018, 2017 and 2016: Other operating income 2018 2017 2016 In millions of COP Operating leases 624,062 563,861 493,486 Net foreign exchange (205,798) 294,068 132,292 Derivatives Foreign exchange contracts 267,189 21,917 164,172 Services (1) 170,459 164,150 167,914 Investment property valuation 77,350 55,573 149,299 Gains on sale of assets 75,976 40,600 60,282 Insurance (2) 54,679 49,640 49,679 Other reversals 47,657 140,012 37,767 Hedging 14,158 (3,678) (5,985) Penalties for failure to contracts 16,302 19,881 14,634 Others 61,768 232,185 203,115 Total Other operating income 1,203,802 1,578,209 1,466,655 (1) Corresponds to income from contracts with customers. To see more information see Note 24.3 Commissions. The gains on sale of portfolio in December 2018 and 2017 amounts to 14,707 and 13,928, respectively. (2) Corresponds to income from Seguros Agromercantil insurance operations.
Disclosure Of Detailed Information About Segment Reportings [Text Block]	The following table shows the balances categorized by nature and by segment of revenue from ordinary activities from contracts with customers as at December 31, 2018, 2017 and 2016: As of December 31, 2018 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off Shore All Other Segments Total before eliminations Adjustments for consolidation ‎ purposes (1) Total after eliminations Revenue from contracts with customers Fees and Commissions Banking services 370,671 66,569 85,615 39,610 - - - 12,783 - 575,248 - 575,248 Credit and debit card fees and commercial estabilshments 1,258,047 185,466 97,163 66,731 - - - 3,707 - 1,611,114 - 1,611,114 Brokerage - 7,033 - 29 - - 20,012 - - 27,074 - 27,074 Acceptances, Guarantees and Standby Letters of Credit 33,313 15,352 4,749 3,055 - - - 897 - 57,366 - 57,366 Trust - 8,184 1,411 645 313,886 - 81,502 37 104 405,769 - 405,769 Securities brokerage - 1,200 1,212 - - 20,262 9,530 - - 32,204 - 32,204 Bancassurance 495,232 28,466 112 - - - - - - 523,810 - 523,810 Payment and collections 559,139 - - 4,084 - - - - - 563,223 - 563,223 Others 124,900 492 36,852 27,099 22 9 2,926 3,416 2,884 198,600 (149) 198,451 Total revenue from contracts with customers (1) 2,841,302 312,762 227,114 141,253 313,908 20,271 113,970 20,840 2,988 3,994,408 (149) 3,994,259 (1) For further information about composition of Bank’ segments see Note 3 As of December 31, 2017 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off Shore All Other Segments Total before eliminations Adjustments for consolidation purposes Total after eliminations Revenue from contracts with customers (1) Fees and Commissions Banking services 335,101 177,930 80,672 38,643 - - - 15,821 - 648,167 - 648,167 Credit and debit card fees and comercial 1,080,814 80,348 89,330 51,175 - - - 2,876 - 1,304,543 - 1,304,543 Brokerage - 2,302 - 35 - - 20,593 - - 22,930 - 22,930 Acceptances, Guarantees and Standby Letters of Credit 41,077 15,699 4,080 2,210 - - - 404 - 63,470 - 63,470 Trust - 4,510 1,335 713 285,648 - 68,180 36 (58) 360,364 - 360,364 Securities brokerage - 2,702 - - - 28,747 6,778 - 843 39,070 - 39,070 Bancassurance 427,190 23,847 - - - - - - 85 451,122 - 451,122 Payments and collections 531,567 - - 4,369 - - - - - 535,936 - 535,936 Others 115,472 10,415 35,742 28,877 - - 1,634 253 3,119 195,512 - 195,512 Total revenue from contracts with customers 1 2,531,221 317,753 211,159 126,022 285,648 28,747 97,185 19,390 3,989 3,621,114 - 3,621,114 (1) For further information about composition of Bank’ segments see Note 3. As of December 31, 2016 Banking Colombia Banking Panama Banking El Salvador Banking Guatemala Trust Investment Banking Brokerage Off Shore All Other Segments Total before eliminations Adjustments for consolidation purposes Total after eliminations Revenue from contracts with customers (1) Fees and Commissions Banking services 329,114 159,015 75,732 37,831 - - - 12,343 - 614,035 4,774 618,809 Credit and debit card fees and comercial 803,731 84,152 87,862 4,771 - - - 4,634 - 985,150 188,752 1,173,902 Brokerage - 5,195 - 45 - - 23,390 - - 28,630 - 28,630 Acceptances, Guarantees and Standby Letters of Credit 45,664 18,406 3,485 2,554 - - - 607 - 70,716 - 70,716 Trust - 4,011 1,075 712 239,610 - 49,903 - - 295,311 - 295,311 Securities brokerage - - 834 - - 19,843 3,700 - - 24,377 - 24,377 Bancassurance 355,523 20,885 64 - - - - - - 376,472 - 376,472 Payments and collections 480,611 - - 6,245 - - - - - 486,856 - 486,856 Others 48,375 189 34,571 29,579 - - 3,578 12,679 1,699 130,670 94,190 224,860 Total revenue from contracts with customers 1 2,063,018 291,853 203,623 81,737 239,610 19,843 80,571 30,263 1,699 3,012,217 287,716 3,299,933 (1) For further information about composition of Bank’ segments see Note 3.

OPERATING EXPENSES (Tables)

OPERATING EXPENSES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of operating expenses [Abstract]
Disclosure Of detailed information on other administrative and general expenses [Text Block]	The detail for administrative and general expenses for the years ended December 31, 2018, 2017 and 2016 is as follows: Other administrative and general expenses 2018 2017 2016 In millions of COP Maintenance and repairs 585,377 530,284 448,017 Others Fees 429,121 427,517 411,521 Insurance 331,430 303,501 286,384 Leasing 256,872 244,956 246,445 Transport 183,857 158,561 154,220 Data processing 147,294 130,125 101,347 Advertising 144,900 127,142 120,046 Frauds and claims (1) 117,032 134,087 72,860 Public services 108,420 107,727 114,840 Cleaning and security services 97,848 92,359 93,336 Communications 73,072 67,201 61,943 Contributions and affiliations 66,636 60,320 59,406 Disputes, fines and sanctions (2) 63,685 139,146 52,441 Useful and stationery 63,321 58,145 61,699 Properties improvements and installation 52,937 59,121 55,307 Travel expenses 37,006 38,037 37,112 Trust 31,100 25,901 13,176 Legal and financial consultant 31,072 25,855 29,435 Production and supply cards 26,575 32,975 29,532 Real estate management 23,694 21,817 19,262 Board of directors and audit fee 21,733 20,450 20,926 Donations 17,402 17,048 18,338 Storage services 15,664 16,162 14,157 Activities Joint Operations 8,719 9,650 8,805 Temporary services 3,724 3,907 7,232 Legal expenses 3,570 4,112 5,897 Public relations 2,899 5,912 5,101 Others 79,809 115,866 102,549 Total other administrative and general expenses 3,024,769 2,977,884 2,651,334 Wealth tax, contributions and other tax burden (2) 692,666 727,661 741,184 (1) The increases in frauds and claims during the year 2018 and 2017 compared with the level of expense recognized as of December 31, 2016, are mainly explained by higher operational risk in virtual transactions and transactions with credit and debit cards. (2) The increase in disputes, fines and sanctions during the year 2017 is caused by the recognition of an income tax provision related with a potential exposure for the fiscal year 2014, consisting in an unrecognized tax benefits amounting to COP 201,554 in income tax liabilities related to tax positions. The 2014 income tax return has been subject to review from the tax authority since April 23, 2015.
Disclosure of impairment depreciation and amortisation expense [Text Block]	25.2. Impairment, depreciation and amortization The detail for Impairment, depreciation and amortization for the years ended December 31, 2018, 2017 and 2016 is as follows: Impairment, depreciation and amortization 2018 2017 2016 In millions of COP Depreciation of premises and equipment 342,605 316,281 329,258 Amortization of intangible assets 123,551 116,752 149,776 Impairment of other assets (1) 27,746 46,078 38,775 Total impairment, depreciation and amortization 493,902 479,111 517,809 (1) The detail of the impairment of other assets net by operating segments for the years ended December 31, 2018, 2017 and 2016 is presented in the table below:
Disclosure of impairment of assets [text block]	(1) The detail of the impairment of other assets net by operating segments for the years ended December 31, 2018, 2017 and 2016 is presented in the table below: 2018 2017 2016 In millions of COP Banking Colombia 20,036 33,889 15,078 Banking Panamá 6,523 5,495 1,934 Banking Guatemala 2,672 1,939 2,118 All other segments 812 1,418 - Brokerage 13 - - Off Shore (173) (26) (60) Banking El Salvador (2,137) 3,363 19,705 Total 27,746 46,078 38,775

EARNING PER SHARE (‘EPS')

EARNING PER SHARE (‘EPS') (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of earnings per share [Abstract]
Disclosure of earnings per share [text block]	The following table summarizes information related to the computation of basic EPS for the years ended December 31, 2018, 2017 and 2016 (in millions of pesos, except per share data): 2018 2017 2016 Income from continuing operations before attribution of non-controlling interests 2,786,435 2,754,173 2,791,450 Less: Non-controlling interests from continuing operations 127,571 139,173 89,619 Net income from continuing operations 2,658,864 2,615,000 2,701,831 Income from operations and disposals of discontinued operations, net of taxes - - 163,497 Less: Non-controlling interests from discontinuing operations - - - Net income attributable to the controlling interest 2,658,864 2,615,000 2,865,328 Less: Preferred dividends declared 402,451 370,983 342,825 Less: Allocation of undistributed earnings to preferred stockholders 816,277 827,126 972,955 Continuing operations 816,277 827,126 896,100 Discontinued operations - - 76,855 Net income allocated to common shareholders for basic and diluted EPS 1,440,136 1,416,891 1,549,548 Weighted average number of common shares outstanding used in basic EPS calculation (In millions) 510 510 510 Basic and Diluted earnings per share to common shareholders 2,825 2,780 3,040 From continuing operations 2,825 2,780 2,870 From discontinuing operations - - 170

RELATED PARTY TRANSACTIONS (Tab

RELATED PARTY TRANSACTIONS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of related party transactions [Abstract]
Disclosure of transactions between related parties [text block]	As of December 31, 2018 Stockholders with an interest equal or higher than 20% of the Bank’s capital Directors and senior management Associates and joint venture In millions of COP Assets Investments - 11 2,450,467 Loans and advances to customers and financial entities, net 642,319 21,331 108,833 Assets held for sale and inventories - - 19,128 (1) Other assets - - 177,537 (2) Total assets 642,319 21,342 2,755,965 Liabilities Deposits 386,467 5,028 190,046 Other liabilities - - 35,581 Total liabilities 386,467 5,028 225,627 Income Interest and other operating income 29,998 558 11,214 Dividends - - 101,091 (3) Others - - 41,985 Net income 29,998 558 154,290 Expenses Interests and other operating expenses 10,844 239 5,790 Fees - 1,145 3 Others - 54 80,312 Total expenses 10,844 1,438 86,105 (1) Investment classified as held for sale. See Note 12. Assets held for sale and Inventories. (2) This item includes portfolio purchase operation held between Bancolombia S.A. and Titularizadora Colombiana and the outstanding dividend on the preferred shares of the Compañía de Financiamiento TUYA S.A. (3) Includes dividend received for preferred shares in Compañía de Financiamiento TUYA S.A. As of December 31, 2017 Stockholders with an interest equal or higher than 20% of the Bank’s capital Directors and senior management Associates and joint venture In millions of COP Assets Investments - - 1,855,511 Loans and advances to customers and financial entities, net 423,706 17,342 124,592 Assets held for sale and inventories - - 18,413 (1) Other assets - 2 127,022 (2) Total assets 423,706 17,344 2,125,538 Liabilities Deposits 363,335 4,363 163,932 Other liabilities - 3 92 Total liabilities 363,335 4,366 164,024 Income Interest and other operating income 6,989 419 11,224 Dividends - - 48,403 Others - - 51,613 Net income 6,989 419 111,240 Expenses Interests and other operating expenses 5,603 269 20,139 Fees - 1,109 19 Others - 53 29,431 Total expenses 5,603 1,431 49,589 (1) Investment classified as held for sale. See Note 12. Assets held for sale and Inventories. (2) This ítem includes portfolio purchase operation held between Bancolombia S.A. and Titularizadora Colombiana. As of December 31, 2016 Stockholders with an interest equal or higher than 20% of the Bank’s capital Directors and management Associates and joint venture (1) In millions of COP Assets Investments - - 1,688,543 Loans and advances to customers and financial entities, net 246,245 15,709 36,262 Other assets - 389 64,078 Total assets 246,245 16,098 1,788,883 Liabilities Deposits 145,266 3,750 230,176 Other liabilities - - 31,941 Total Liabilities 145,266 3,750 262,117 Income Interest and other operating income 8,951 931 6,089 Dividends - - 49,627 Others - - 51,586 Net income 8,951 931 107,302 Expenses Interests and other operating expenses 430 767 13,912 Fees - 1,001 5 Others - - 37,370 Total expenses 430 1,768 51,287 (1) This ítem includes operations held between Bancolombia S.A. and Compañía de Financiamiento Tuya S.A. since November 1, 2016 when the Bank lost control of Tuya S.A. Furthermore, the item includes operations held between Bancolombia S.A. and Sociedad Servicios de Aceptación S.A.S. since June 2016, when that company was set up.
Disclosure of detailed information about financial conglomerate operations [Text Block]	The following table shows the operations carried out in 2018 and 2017 on the related party chart of the Grupo Sura conglomerate: December 31, 2018 December 31, 2017 In millons of COP Assets Investments 440,294 376,171 Loans and advances to customers and financial entities, net 455,675 191,278 Other assets 2 8 Total assets 895,971 567,457 Liabilities Deposits 1,347,005 1,015,523 Other liabilities 5,818 1,882 Total liabilities 1,352,823 1,017,405 Income Interest and other operating income 602,831 488,190 Dividends 14,909 15,021 Net income 617,740 503,211 Expenses Interests and other operating expenses 54,758 32,568 Fees 2 4 Others 3,025 4,788 Total expenses 57,785 37,360

LIABILITIES FROM FINANCING AC_2

LIABILITIES FROM FINANCING ACTIVITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of liabilities from financing activities [Abstract]
Disclosure of reconciliation of liabilities arising from financing activities [text block]	The following table presents the reconciliation of the balances of liabilities from financing activities as of December 31, 2018 and 2017: Balance as of January 1, 2018 Cash flows Non-cash changes Balance as of December 31, 2018 Foreign currency translation adjustment Interests accrued Other movements In millions of COP Liabilities from financing activities Repurchase agreements and other similar secured borrowing 3,236,128 (922,840) 2,267 - - 2,315,555 Borrowings from other financial institutions (1) 13,822,152 513,244 1,297,690 783,349 (78,471) (2) 16,337,964 Debt instruments in issue (1) 19,648,714 (1,697,698) 1,255,806 961,903 118,508 20,287,233 Preferred shares (3) 582,985 (57,701) - - 58,713 583,997 Total liabilities from financing activities 37,289,979 (2,164,995) 2,555,763 1,745,252 98,750 39,524,749 (1) The cash flows disclosed in this table related with Borrowings from other financial institutions and Debt securities in issue include the interests paid during the year amounting to COP 788,879 and COP 961,333, respectively, which are classified as cash flows from operating activities in the consolidated statement of cash flow. (2) The amount of COP (78,471) is mainly comprised by the decrease of the liabilities related to assets held for sale. (3) The cash flow amounting to COP 57,701 corresponds to the fixed minimum dividend paid to the preferred shares' holders and is included in the line "dividends paid" of the consolidated statement of cash flow, which includes the divideds paid during the year to both preferred and common shares holders. Balance as of January 1, 2017 Cash flows Non-cash changes Balance as of December 31, 2017 Foreign currency translation adjustment Interests accrued Other movements In millions of COP Liabilities from financing activities Repurchase agreements and other similar secured borrowing 1,924,010 1,313,442 (1,324) - - 3,236,128 Borrowings from other financial institutions (1) 18,905,843 (5,883,247) (177,290) 1,075,716 (98,870) (2) 13,822,152 Debt securities in issue (1) 18,704,809 (40,069) (73,652) 1,056,024 1,602 19,648,714 Preferred shares (3) 581,972 (57,701) - - 58,714 582,985 Total liabilities from financing activities 40,116,634 (4,667,575) (252,266) 2,131,740 (38,554) 37,289,979 (1) The cash flows disclosed in this table related with Borrowings from other financial institutions and Debt securities in issue include the interests paid during the year amounting to COP 1,031,078 and COP 1,084,096, respectively, which are classified as cash flows from operating activities in the consolidated statement of cash flow. (2) The amount of COP (98,870) is mainly comprised by the reclassification of liabilities relating to assets held for sale. (3) The cash flow amounting to COP 57,701 corresponds to the fixed minimum dividend paid to the preferred shares' holders and is included in the line "dividends paid" of the consolidated statement of cash flow, which includes the divideds paid during the year to both preferred and common shares holders.

FAIR VALUE OF ASSETS AND LIAB_2

FAIR VALUE OF ASSETS AND LIABILITIES (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of fair value of assets and liabilities [Abstract]
Disclosure of detailed information about carrying amount and the fair value of the assets and liabilities [Text Block]	The following table presents the carrying amount and the fair value of the assets and liabilities as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 Carrying amount Fair Value Carrying amount Fair Value In millions of COP Assets Debt instruments at fair value through profit or loss 8,909,861 8,909,861 10,701,855 10,701,855 Debt instruments at fair value through OCI (1) 3,329,738 3,329,738 - - Debt instruments at amortized cost 3,481,928 3,461,616 4,157,568 4,131,688 Derivative financial instruments 1,843,708 1,843,708 1,134,372 1,134,372 Equity securities at fair value 1,639,948 1,639,948 1,517,830 1,517,830 Loans and advances to customers and financial institutions, net 163,583,285 167,551,429 152,244,991 149,162,071 Investment property 1,732,873 1,732,873 1,657,409 1,657,409 Investments in associates (2) 1,119,973 1,119,973 757,886 757,886 Equity securities - Assets held for sale - - 2,486 2,486 Total 185,641,314 189,589,146 172,174,397 169,065,597 Liabilities Deposits by customers 142,128,471 142,860,996 131,959,215 132,779,730 Interbank deposits 1,374,222 1,374,222 1,084,591 1,084,591 Repurchase agreements and other similar secured borrowing 2,315,555 2,315,555 3,236,128 3,236,128 Derivative financial instruments 1,295,070 1,295,070 945,853 945,853 Borrowings from other financial institutions 16,337,964 16,337,964 13,822,152 13,822,152 Preferred shares 583,997 602,597 582,985 662,999 Debt instruments in issue 20,287,233 20,759,456 19,648,714 20,756,154 Total 184,322,512 185,545,860 171,279,638 173,287,607 (1) For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards. (2) It corresponds investments in associates P.A Viva Malls. See Note 7 investments in associates and joint ventures
Disclosure of fair value measurement of assets [text block]	The following table presents for each of the fair-value hierarchy levels the Bank’s assets and liabilities that are measured at fair value on a recurring basis at December 31, 2018 and 2017: Financial Assets Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Investment securities Debt instruments at fair value through profit or loss Securities issued by the Colombian Government 7,170,085 72,083 - 7,242,168 6,013,860 989,287 - 7,003,147 Securities issued or secured by government entities 24,588 12,851 6,407 43,846 9,186 26,852 - 36,038 Securities issued by other financial institutions 115,234 338,992 206,950 661,176 177,531 578,196 297,049 1,052,776 Securities issued by foreign governments 397,115 420,524 - 817,639 1,196,963 1,275,031 - 2,471,994 Corporate bonds 61,556 83,317 159 145,032 33,800 100,982 3,118 137,900 Total debt instruments at fair value through profit or loss 7,768,578 927,767 213,516 8,909,861 7,431,340 2,970,348 300,167 10,701,855 Debt instruments at fair value through OCI (1) Securities issued by other financial institutions - 186,250 - 186,250 - - - - Securities issued by foreign governments 1,630,379 1,513,109 - 3,143,488 - - - - Total debt instruments at fair value through OCI 1,630,379 1,699,359 - 3,329,738 - - - - Total debt instruments 9,398,957 2,627,126 213,516 12,239,599 7,431,340 2,970,348 300,167 10,701,855 Equity securities Equity securities 100,233 115 1,539,600 1,639,948 145,250 28,976 1,343,604 1,517,830 Total equity securities 100,233 115 1,539,600 1,639,948 145,250 28,976 1,343,604 1,517,830 Derivative financial instruments Forwards Foreign exchange contracts - 96,426 197,919 294,345 - 78,189 94,121 172,310 Equity contracts - 968 13 981 - 357 15 372 Total forwards - 97,394 197,932 295,326 - 78,546 94,136 172,682 Swaps Foreign exchange contracts - 1,053,684 145,552 1,199,236 - 482,330 190,228 672,558 Interest rate contracts 2,935 198,697 51,296 252,928 8,171 220,027 45,939 274,137 Total swaps 2,935 1,252,381 196,848 1,452,164 8,171 702,357 236,167 946,695 Options Foreign exchange contracts - 6,707 89,511 96,218 - 746 14,249 14,995 Total options - 6,707 89,511 96,218 - 746 14,249 14,995 Total derivative financial instruments 2,935 1,356,482 484,291 1,843,708 8,171 781,649 344,552 1,134,372 Investment properties Buildings - - 1,483,594 1,483,594 - - 1,425,585 1,425,585 Financial Assets Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Lands - - 249,279 249,279 - - 231,824 231,824 Total investment properties - - 1,732,873 1,732,873 - - 1,657,409 1,657,409 Investment in associates PA Viva Malls - - 1,119,973 1,119,973 - - 757,886 757,886 Total investment in associates and joint ventures - - 1,119,973 1,119,973 - - 757,886 757,886 Equity securities - Assets held for sale Assets held for sale - - - - - - 2,486 2,486 Total Equity securities - Assets held for sale - - - - - - 2,486 2,486 Total 9,502,125 3,983,723 5,090,253 18,576,101 7,584,761 3,780,973 4,406,104 15,771,838
Disclosure of fair value measurement of liabilities [text block]	(1) For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies. Financial liabilities Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Derivative financial instruments Forwards Foreign exchange contracts - (242,844) (56,171) (299,015) - (122,424) (20,552) (142,976) Equity contracts - (7,325) (260) (7,585) - (3,955) (515) (4,470) Total forwards - (250,169) (56,431) (306,600) - (126,379) (21,067) (147,446) Swaps Foreign exchange contracts - (654,093) (46,810) (700,903) - (459,789) (46,034) (505,823) Interest rate contracts (3,887) (248,436) (5,655) (257,978) (9,347) (252,660) (13,634) (275,641) Total swaps (3,887) (902,529) (52,465) (958,881) (9,347) (712,449) (59,668) (781,464) Options Foreign exchange contracts - (29,589) - (29,589) - (16,943) - (16,943) Total options - (29,589) - (29,589) - (16,943) - (16,943) Total derivative financial instruments (3,887) (1,182,287) (108,896) (1,295,070) (9,347) (855,771) (80,735) (945,853) Total (3,887) (1,182,287) (108,896) (1,295,070) (9,347) (855,771) (80,735) (945,853)
Disclosure of detailed information about Fair value of assets and liabilities that are not measured at fair value in the Statement of Financial Position [Text Block]	The following table presents for each of the fair-value hierarchy levels the Bank’s assets and liabilities that are not measured at fair value in the statement of financial position but for which the fair value is disclosed at December 31, 2018 and 2017: Assets Type of instrument December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Debt instruments Securities issued by the Colombian Government 36,847 13,424 - 50,271 - 12,967 - 12,967 Securities issued or secured by government entities 17,744 386,396 1,449,333 1,853,473 17,204 528,395 1,350,175 1,895,774 Securities issued by other financial institutions 107,959 23,375 12,326 143,660 194,606 21,871 12,007 228,484 Securities issued by foreign governments 130,913 141,652 - 272,565 748,060 302,795 - 1,050,855 Corporate bonds 259,904 53,395 828,348 1,141,647 231,601 49,694 662,313 943,608 Total – Debt instruments 553,367 618,242 2,290,007 3,461,616 1,191,471 915,722 2,024,495 4,131,688 Loans and advances to customers and financial institutions, net - - 167,551,429 167,551,429 - - 149,162,071 149,162,071 Total 553,367 618,242 169,841,436 171,013,045 1,191,471 915,722 151,186,566 153,293,759 Liabilities Type of instruments December 31, 2018 December 31, 2017 Fair value hierarchy Total fair value Fair value hierarchy Total fair value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Deposits by customers - (30,490,414) (112,370,582) (142,860,996) - (30,440,868) (102,338,862) (132,779,730) Interbank deposits - - (1,374,222) (1,374,222) - - (1,084,591) (1,084,591) Repurchase agreements and other similar secured borrowing - - (2,315,555) (2,315,555) - - (3,236,128) (3,236,128) Borrowings from other financial institutions - - (16,337,964) (16,337,964) - - (13,822,152) (13,822,152) Preferred shares - - (602,597) (602,597) - - (662,999) (662,999) Debt instruments in issue (9,503,793) (8,486,088) (2,769,575) (20,759,456) (8,999,118) (9,534,766) (2,222,270) (20,756,154) Total (9,503,793) (38,976,502) (135,770,495) (184,250,790) (8,999,118) (39,975,634) (123,367,002) (172,341,754)
Disclosure of detailed information about items measured at fair value on a non-recurring basis [Text Block]	The Bank measures certain foreclosed assets held for sale based on fair value less costs to sell. The fair values were determined using external and internal valuation techniques or third party experts, depending on the type of underlying asset. The following breakdown sets forth the fair value hierarchy of those assets classified by type: December 31, 2018 December 31, 2017 Fair-value hierarchy Total fair Value Fair-value hierarchy Total fair Value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Machinery and equipment - - 5,556 5,556 - - 11,500 11,500 Real estate for residential purposes - - 92,052 92,052 - - 23,854 23,854 Real estate different from residential properties - - 24,076 24,076 - - 1,402 1,402 Collateralized loans (1) - - - - - - 5,417,875 5,417,875 Total - - 121,684 121,684 - - 5,454,631 5,454,631 (1) From January 1, 2018 onwards, the disclosure of collateralized loans is no longer required, due to the adoption of IFRS 9
Disclosure of detailed information about investment in associates [Text Block]	December 31, 2018 December 31, 2017 Fair-value hierarchy Total fair Value Fair-value hierarchy Total fair Value Level 1 Level 2 Level 3 Level 1 Level 2 Level 3 In millions of COP Investment in Associates - TUYA - - 561,285 561,285 - - 225,548 225,548 Total - - 561,285 561,285 - - 225,548 225,548
Disclosure of detailed information about Changes in Level 3 Fair-Value Category [Text Block]	The table below presents reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during 2018 and 2017: As of December 31, 2018 Balance, January 1, 2018 Included in earnings OCI Purchases / reclassifications Settlement Prepaids Transfers in to Level 3 Transfers out of Level 3 Balance, December 31, 2018 Debt instruments at fair value though profit or loss Securities issued or secured by Government entities - 53 - 1,383 - - 4,971 - 6,407 Securities issued or secured by other financial entities 297,049 (54,595) - 29,149 (64,014) - 5,394 (6,033) 206,950 Corporate bonds 3,118 (3,983) - 4,159 (2,518) - - (617) 159 Total 300,167 (58,525) - 34,691 (66,532) - 10,365 (6,650) 213,516 Derivative financial instruments Foreign exchange contracts 232,012 25,016 - 230,869 (107,890) - (40,898) (9,108) 330,001 Interest rate contracts 32,305 (13,320) - 17,561 (9,152) - 19,106 (859) 45,641 Equity contracts (500) - - (247) 500 - - - (247) Total 263,817 11,696 - 248,183 (116,542) - (21,792) (9,967) 375,395 Equity securities Equity securities 1,343,604 131,446 38,648 41,459 (15,557) - - - 1,539,600 Total 1,343,604 131,446 38,648 41,459 (15,557) - - - 1,539,600 Investment in associates PA Viva Malls 757,886 87,136 - 274,951 - - - - 1,119,973 Total 757,886 87,136 - 274,951 - - - - 1,119,973 Equity securities - Assets held for sale Assets held for sale 2,486 - - - (2,486) - - - - Total 2,486 - - - (2,486) - - - - As of December 31, 2017 Balance, January 1, 2017 Included in earnings OCI Purchases / reclassifications Settlement Prepaids Transfers in to Level 3 Transfers out of Level 3 Balance, December 31, 2017 In millions of COP Debt instruments at fair value Securities issued or secured by other financial entities 405,099 (70,416) - 52,316 (58,999) - - (30,951) 297,049 Corporate bonds 14,929 (4,211) - 5,999 (10,869) (72) - (2,658) 3,118 Total 420,028 (74,627) - 58,315 (69,868) (72) - (33,609) 300,167 Derivative financial instruments Foreign exchange contracts 378,385 353 - 231,260 (378,053) - 103 (36) 232,012 Interest rate contracts 17,596 - - 34,067 (17,596) - (1,762) - 32,305 Equity contracts 337 - - (500) (337) - - - (500) Total 396,318 353 - 264,827 (395,986) - (1,659) (36) 263,817 Equity securities Equity securities 1,178,678 107,848 26,736 116,743 (41,948) - 6,950 (51,403) 1,343,604 Total 1,178,678 107,848 26,736 116,743 (41,948) - 6,950 (51,403) 1,343,604 Investment in associates PA Viva Malls 388,595 108,868 - 262,918 (2,495) - - - 757,886 Total 388,595 108,868 - 262,918 (2,495) - - - 757,886 Equity securities - Assets held for sale Assets held for sale - - - 1,345 - - 1,141 - 2,486 Total - - - 1,345 - - 1,141 - 2,486
Disclosure of significant unobservable inputs used in fair value measurement of assets [text block]	The following table sets forth information about significant unobservable inputs related to the Bank’s material categories of Level 3 financial assets and liabilities and the sensitivity of these fair values to reasonably possible alternative assumptions. As of December 31, 2018 Financial instrument Fair Value Valuation technique Significant unobservable input Range of inputs Weighted average Sensitivity 100 basis point increase Sensitivity 100 basis point decrease Amounts in millions of COP Debt instruments Securities issued by other financial institutions Yield 0.16% to 0.90% 0.69% 160,056 168,000 TIPS 164,401 Discounted cash Liquidity risk 0% to 9.38% 3.58% 160,162 167,881 flow Prepayment Speed n/a n/a 164,102 163,602 Other bonds 34,961 Discounted cash flow Yield 0.14% to 0.89% 0.60% 33,700 36,299 Liquidity risk 2.80% to 3.48% 3.04% 33,142 35,678 Securitizations 5,394 Discounted cash flow Yield 2.04 2.04% 5,376 5,421 Multilateral bonds 2,194 Discounted cash flow Yield ( 0.05 (0.05%) 2,187 2,197 Securities issued by other financial institutions 206,950 Securities issued by foreign governments Governments bonds 6,407 Discounted cash flow Yield 0.32% 0.32% 6,406 6,413 Securities issued by foreign governments 6,407 Corporate bonds 159 Discounted cash flow Yield 0.27% 0.27% 159 160 Total debt instruments 213,516 Equity securities Equity securities 1,539,600 Price-based Price n/a n/a n/a n/a Derivative financial instruments Forward 141,501 Discounted cash flow Credit spread 0% to 21.55% 2.96% 140,844 155,113 Swaps 144,383 Discounted cash flow Credit spread 0% to 54.30% 2.58% 139,506 136,941 Options 89,511 Black-Scholes Credit spread 0% to 18.81% 0.77% 88,834 89,876 Investment in associates 375,395 P.A Viva Malls 1,119,973 Price-based Price n/a n/a n/a n/a Assets held for sale - n/a n/a n/a n/a n/a n/a As of December 31, 2017 Financial instrument Fair Value Valuation technique Significant unobservable input Range of inputs Weighted average Sensitivity 100 basis point increase Sensitivity 100 basis point decrease Amounts in millions of COP Debt instruments Securities issued by other financial institutions Yield 0.43% to 10.35% 0.63% 225,867 235,382 TIPS 236,236 Discounted cash flow Liquidity risk Premium 0% to 10.35% 4.48% 226,007 235,228 Financial instrument Fair Value Valuation technique Significant unobservable input Range of inputs Weighted average Sensitivity 100 basis point increase Sensitivity 100 basis point decrease Prepayment Speed n/a n/a 231,087 230,152 Other bonds 41,776 Discounted cash flow Yield (0.11%) to 0.76% 0.81% 35,305 38,282 Securitizations 10,919 Discounted cash flow Yield 2.24% to (3.43%) (1.19%) 10,825 11,014 Time deposit 8,118 Discounted cash flow Yield 1.77% to 1.86% 1.81% 8,056 8,184 Securities issued by other financial institutions 297,049 Corporate bonds 3,118 Discounted cash flow Yield (0.11%) to 0.76% 0.81% 3,292 2,985 Total debt instruments 300,167 Equity securities Equity securities 1,343,604 Price-based Price n/a n/a n/a n/a Derivative financial instruments Options 14,249 Black-Scholes Recovery rate 0.06% to 23.75% 4.99% 14,142 14,280 Forward 73,069 Discounted cash flow Credit spread 0% to 16.54% 2.41% 72,886 73,263 Swaps 176,499 Discounted cash flow Credit spread 0% to 21.31% 1.95% 170,701 182,343 Investment in associates P.A Viva Malls 757,886 Price-based Price n/a n/a n/a n/a Equity securities - Assets held for sale Assets held for sale 2,486 Price-based Price n/a n/a n/a n/a

DISCONTINUED OPERATIONS (Tables

DISCONTINUED OPERATIONS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of discontinued operations [Abstract]
Disclosure of detailed information about the analysis of the results of discontinued operations [Text Block]	Results of operations as of October 31, 2016, recognized in the Consolidated Statement of Income as Net income from discontinued operations, are the following: Ten months ended October 31, 2016 In millons of COP Interest income on loans 408,233 Overnight and market funds 320 Interest and valuation on investment 1,246 Total interest and valuation 409,799 Interest expense (106,110) Net margin on financial instruments 303,689 Credit impairment charges on loans, net (323,290) Net interest and valuation income after provision for loans and financial leases (19,601) Fees and other service income, net 244,193 Other operating income 1,365 Total income, net 225,957 Total operating expenses (221,310) Profit before tax 4,647 Income tax (2,961) Net income from discontinued operations 1,686

RISK MANAGEMENT (Tables)

RISK MANAGEMENT (Tables)	12 Months Ended
	Dec. 31, 2018
Risk Management [Line Items]
Disclosure of credit risk exposure [text block]	The information below contains the maximum exposure to credit risk: December 31, 2018 Maximum exposure to credit risk - Financial instruments subject to impairment In millions of COP Stage 1 Stage 2 Stage 3 Total Loans and Advances 153,894,099 7,712,055 12,212,962 173,819,116 Commercial 83,632,770 3,214,860 7,753,018 94,600,648 Consumer 28,666,461 1,758,162 1,568,758 31,993,381 Mortgage 20,280,416 1,513,063 1,077,206 22,870,685 Small Business Loans 958,491 80,805 116,902 1,156,198 Financial Leases 20,355,961 1,145,165 1,697,078 23,198,204 Off-Balance Sheet Exposures 38,831,993 349,228 354,525 39,535,746 Financial Guarantees 5,641,482 18,340 1,839 5,661,661 Loan Commitments 33,190,511 330,888 352,686 33,874,085 Loss Allowance (1,872,529) (1,246,444) (7,244,517) (10,363,490) Total 190,853,563 6,814,839 5,322,970 202,991,372 Maximum Exposure to Credit Risk - Other Financial Instruments Maximum Exposure Collateral * Net Exposure 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Debt instruments 15,745,530 14,859,423 (2,352,276) (2,741,345) 13,393,254 12,118,078 Derivatives ** 894,001 457,940 (97) (125,902) 893,905 332,038 Equity 1,639,949 1,520,313 - - 1,639,949 1,520,313 Total 18,279,480 16,837,676 (2,352,373) (2,867,247) 15,927,108 13,970,429 See Notes on this table: * Collateral Held (-) and Collateral Pledged (+) ** * Debt instruments Book value 100% * Equity Instruments: - Shares:100% - Investment funds: Book value 100% December 31, 2017 Maximum exposure Collateral Net exposure In millions of COP Loans and Advances 160,468,094 (71,122,738) 89,345,356 Commercial 88,997,241 (42,593,800) 46,403,441 Consumer 27,646,114 (5,915,201) 21,730,913 Mortgage 20,512,208 (18,991,957) 1,520,251 Small Business Loans 1,063,580 (652,227) 411,353 Financial Leases 22,248,951 (2,969,553) 19,279,398 Off-Balance Sheet Exposures 22,360,075 - 22,360,075 Financial Guarantees 6,701,643 - 6,701,643 Loan Commitments 15,658,432 - 15,658,432 Other Financial Instruments (1) 16,837,677 (2,867,247) 13,970,430 Debt Securities 14,859,423 (2,741,345) 12,118,078 Derivatives 457,940 (125,902) 332,038 Equity Securities (2) 1,520,314 - 1,520,314 Total 199,665,846 (73,989,985) 125,675,861 (1) Collateral Held (-) and Collateral Pledged (+). (2) Includes investments classified as “assets held for sale”. See Note 12 Assets held for sale and inventories, net.
Disclosure of Credit Risk Management, Borrower Portfolio Variables Explanatory [Text Block]	The borrowers in this portfolio are mainly made up of companies, segmented in homogenous groups that are constituted according to size, annual sales or main activity. The following variables are part of this classification: Segment Incomes/Sales Corporate Companies with annual sales >= COP 80,000 M. Banistmo places borrowers with annual sales >= USD 10 M. Banco Agrícola and BAM place borrowers with annual sales >= USD 25 M. Business Companies with annual sales > = COP 20,000 M and < COP 80,000 M except for Banco Agrícola and BAM, which place borrowers with annual sales >= USD 5 M and < USD 25 M. Business Construction Constructors who dedicate themselves professionally to the construction of buildings to be sold or rented as their main activity, with annual sales >= COP 20,000 M and <= COP 45,000 M. They must have more than 3 projects executed as previous experience. Corporate Construction Constructors who dedicate themselves to the construction of buildings to be sold or rented as their main activity, with annual sales > COP 45,000 M. They must have more than 3 projects executed as previous experience. SME Construction Constructors who dedicate themselves professionally to the construction of buildings to be sold or rented as their main activity with annual sales >= COP 380 M and <= COP 20,000 M. They must have more than 3 projects executed as previous experience. Institutional Financing Financial sector institutions. Government Municipalities, districts, departments with their respective decentralized organizations and entities at the national level with incomes >= COP 20,000 M. SME Annual sales < COP 20,000 M, with a classification between small, medium, large and plus except for Banistmo which includes borrowers < USD 10 M in annual sales, for Banco Agrícola and BAM < USD 5 M.
Summary of Amounts and Allowance of Financial Assets Explanatory [Text Block]	Watch List December 31 2018 Million COP Risk Level Amount % Allowance Level 1 – Low Risk 9,179,165 1.04% 95,896 Level 2 – Medium Risk 2,549,977 8.96% 228,461 Level 3 – High Risk 1,626,478 38.92% 633,101 Level 4 – High Risk 4,096,563 64.68% 2,649,837 Total 17,452,183 20.67% 3,607,295 Watch List December 31 2017 Million COP Risk Level Amount % Allowance Level 1 – Low Risk 4,938,711 2.32% 114,361 Level 2 – Medium Risk 1,641,169 4.98% 81,796 Level 3 - High Risk 3,806,554 33.21% 1,264,077 Level 4— High Risk 1,509,014 76.22% 1,150,212 Total 11,895,448 21.94% 2,610,446
Disclosure of collateral [text block]	The following table shows loans and financial leases, classified in commercial, consumer, mortgage, financial leases and small business loans, and disaggregated by type of collateral: December 31, 2018 Amount Covered by Collateral In Millions of COP Nature of the Collateral Commercial Consumer Mortgage Financial Leasing Small Business Total Real Estate and Residential 21,209,517 1,744,581 20,720,459 84 282,822 43,957,463 Goods Given in Real Estate Leasing - - 243 12,752,932 - 12,753,175 Goods Given in Leasing Other Than Real Estate - - - 5,900,913 - 5,900,913 Stand by Letters of Credit 667,976 229 - - - 668,205 Security Deposits 470,400 369,689 - - 76,136 916,225 Guarantee Fund 2,595,913 138 - 118,747 288,890 3,003,688 Sovereign of the Nation - - - - - - Collection Rights 3,992,592 49,910 - - 1,452 4,043,954 Other Collateral (Pledges) 4,118,947 4,713,359 48,098 20 14,158 8,894,582 Without Guarantee (Uncovered Balance) 61,545,303 25,115,475 2,101,885 4,425,508 492,740 93,680,911 Total loans and financial leases 94,600,648 31,993,381 22,870,685 23,198,204 1,156,198 173,819,116 December 31, 2017 Amount Covered by Collateral In Millions of COP Nature of the Collateral Commercial Consumer Mortgage Financial Leasing Small Business Total Real Estate and Residential 19,529,154 1,572,455 18,959,433 - 273,248 40,334,290 Goods Given in Real Estate Leasing 7,725,197 - - 2,392,075 - 10,117,272 Goods Given in Leasing Other Than Real Estate 5,124,246 112,724 - 577,447 - 5,814,417 Stand by Letters of Credit 455,793 - - - - 455,793 Security Deposits 779,008 300,730 - - 56,588 1,136,326 Guarantee Fund 2,583,354 147 - - 301,045 2,884,546 Sovereign of the Nation 12,710 - - - - 12,710 Collection Rights 3,220,882 41,597 - - 1,119 3,263,598 Other Collateral (Pledges) 3,163,456 3,887,548 32,524 31 20,227 7,103,786 Without Guarantee (Uncovered Balance) 46,403,441 21,730,913 1,520,251 19,279,398 411,353 89,345,356 Total loans and financial leases 88,997,241 27,646,114 20,512,208 22,248,951 1,063,580 160,468,094
Disclosure Of Loans And Advances To Customer Explanatorys [Text Block]	The composition of the credit portfolio in commercial, consumer, mortgage, financial leases and small business loans categories are as follows: Composition December 31 2018 December 31, 2017 In millions of COP Commercial 94,600,648 88,997,241 Corporate 55,562,618 58,661,267 SME 16,524,571 17,184,059 Others 22,513,459 13,151,915 Consumer 31,993,381 27,646,114 Credit card 7,026,689 6,255,277 Vehicle 3,253,060 2,915,705 Payroll loans 7,451,381 6,970,783 Others 14,262,251 11,504,349 Mortgage 22,870,685 20,512,208 VIS 1 5,778,067 5,491,926 Non- VIS 17,092,618 15,020,282 Financial Leases 23,198,204 22,248,951 Small Business Loan 1,156,198 1,063,580 Loans and advances to customers and financial institutions 173,819,116 160,468,094 Allowance for loans and advances and lease losses (10,235,831) (8,223,103) Total net loan and financial leases 163,583,285 152,244,991 1 VIS: Social Interest Homes, corresponds to mortgage loans granted by the financial institutions of amounts less than 135 minimum wages.
Disclosure Of Detailed Information of Maturity Analysis of Loans And Receivables [Text Block]	The following table shows the ranges of maturity for the credit loans and financial leases, according for the remaining term for the completion of the contract: December 31, 2018 Maturity Less Than 1 Year Between 1 and 3 Years Between 3 and 5 Years Greater Than 5 Years Total In millions of COP Commercial 31,052,548 18,846,830 16,216,100 28,485,170 94,600,648 Corporate 16,569,691 8,491,758 11,335,723 19,165,446 55,562,618 SME 5,253,678 5,482,139 2,774,471 3,014,283 16,524,571 Others 9,229,179 4,872,933 2,105,906 6,305,441 22,513,459 Consumer 749,322 4,562,956 12,069,707 14,611,396 31,993,381 Credit card 100,367 244,218 1,073,539 5,608,565 7,026,689 Vehicle 60,754 610,398 1,538,979 1,042,929 3,253,060 Payroll loans 62,657 624,660 1,397,974 5,366,090 7,451,381 Others 525,544 3,083,680 8,059,215 2,593,812 14,262,251 Mortgage 58,613 175,572 479,086 22,157,414 22,870,685 VIS 11,056 51,768 117,404 5,597,839 5,778,067 Non-VIS 47,557 123,804 361,682 16,559,575 17,092,618 Financial Leases 2,393,428 2,560,578 4,260,513 13,983,685 23,198,204 Small business loans 256,093 477,456 220,105 202,544 1,156,198 Total gross loans and financial leases 34,510,004 26,623,392 33,245,511 79,440,209 173,819,116 December 31, 2017 Maturity Less Than 1 Year Between 1 and 3 Years Between 3 and 5 Years Greater Than 5 Years Total In millions of COP Commercial 26,641,770 19,583,956 13,561,261 29,210,254 88,997,241 Corporate 17,054,923 11,588,101 8,533,725 21,484,518 58,661,267 SME 5,568,251 5,684,612 2,973,761 2,957,435 17,184,059 Others 4,018,596 2,311,243 2,053,775 4,768,301 13,151,915 Consumer 1,393,022 4,826,773 12,035,699 9,390,620 27,646,114 Credit card 761,294 1,104,571 2,384,220 2,005,192 6,255,277 Vehicle 67,118 718,610 1,499,980 629,997 2,915,705 Payroll loans 52,087 692,079 1,325,911 4,900,706 6,970,783 Others 512,523 2,311,513 6,825,588 1,854,725 11,504,349 Mortgage 50,102 148,851 389,456 19,923,799 20,512,208 VIS 12,238 40,182 93,917 5,345,589 5,491,926 Non-VIS 37,864 108,669 295,539 14,578,210 15,020,282 Financial Leases 3,101,344 2,698,394 3,546,370 12,902,843 22,248,951 Small business loans 232,596 479,646 182,893 168,445 1,063,580 Total gross loans and financial leases 31,418,834 27,737,620 29,715,679 71,595,961 160,468,094
Disclosure of details of credit portfolio by main economic activity of borrower [Text Block]	The following table contains the detail of the credit portfolio of loans and financial leases by main economic activity of the borrower: December 31, 2018 Economic sector Loans and advances Local Foreign Total In millions of COP Agriculture 3,804,075 2,548,078 6,352,153 Petroleum and Mining Products 1,082,816 181,789 1,264,605 Food, Beverages and Tobacco 5,865,111 320,596 6,185,707 Chemical Production 3,566,746 12,561 3,579,307 Government 4,457,944 79,133 4,537,077 Construction 14,508,354 5,513,212 20,021,566 Commerce and Tourism 16,928,137 7,641,117 24,569,254 Transport and Communications 8,331,727 865,257 9,196,984 Public Services 6,007,483 966,764 6,974,247 Consumer Services 35,886,645 20,813,390 56,700,035 Commercial Services 17,041,170 5,540,572 22,581,742 Other Industries and Manufactured Products 5,978,092 5,878,347 11,856,439 Total 123,458,300 50,360,816 173,819,116 December 31, 2017 Economic sector Loans and advances Local Foreign Total In millions of COP Agriculture 3,533,671 2,171,525 5,705,196 Petroleum and Mining Products 909,127 65,991 975,118 Food, Beverages and Tobacco 5,640,910 808,493 6,449,403 Chemical Production 3,341,248 172,763 3,514,011 Government 3,780,686 151,879 3,932,565 Construction 15,464,605 5,164,321 20,628,926 Commerce and Tourism 17,115,018 6,520,546 23,635,564 Transport and Communications 8,307,712 602,962 8,910,674 Public Services 5,180,634 2,472,215 7,652,849 Consumer Services 31,367,376 16,719,168 48,086,544 Commercial Services 16,248,665 3,993,836 20,242,501 Other Industries and Manufactured Products 6,367,961 4,366,782 10,734,743 Total 117,257,613 43,210,481 160,468,094
Disclosure of details of loans and financial leases by country [Text Block]	The following table shows the concentration of the loans and financial leases by country. Loans are presented based on the country in which they were originated: December 31, 2018 Country Loans and advances % Participation Allowance for loans and advances and lease losses % Participation Colombia 119,674,770 68.85% 8,402,751 82.09% Panama 32,299,274 18.58% 910,268 8.89% El Salvador 10,590,571 6.09% 465,122 4.54% Puerto Rico 889,528 0.51% 29,041 0.29% Guatemala 10,352,272 5.96% 427,747 4.18% Other countries 12,701 0.01% 902 0.01% Total 173,819,116 100.0% 10,235,831 100.0% December 31, 2017 Country Loans and advances % Participation Allowance for loans and advances and lease losses % Participation Colombia 112,862,226 70.30% 7,164,085 87.10% Panama 28,722,853 17.90% 507,181 6.20% El Salvador 9,120,415 5.70% 358,258 4.40% Puerto Rico 847,767 0.50% 14,941 0.20% Guatemala 8,902,627 5.50% 177,895 2.10% Other countries 12,206 0.10% 743 0.00% Total 160,468,094 100.00% 8,223,103 100.00%
Disclosure of financial assets that are either past due or impaired [text block]	The following table shows information about credit quality of the borrower: December 31 2018 Risk Category Stage 1 Stage 2 Stage 3 Simplified methodology Total In millions of COP A- Normal Risk 135,000,193 2,058,010 - 105,793 137,163,996 B- Acceptable Risk 16,752,640 2,472,886 - - 19,225,526 C- Appreciable Risk 2,141,266 3,059,084 - - 5,200,350 D- Significant Risk - 4,032 - - 4,032 E- Unrecoverable Risk - 12,250 12,212,962 - 12,225,212 Total 153,894,099 7,606,262 12,212,962 105,793 173,819,116 December 31 2017 Risk Category Current loans without impairment Past due loans without impairment Current loans that are impaired Past due and impaired loans Total In millions of COP A- Normal Risk 139,543,463 224,259 783,333 7,108 140,558,163 B- Acceptable Risk 5,986,958 1,265,787 1,848,716 88,508 9,189,969 C- Appreciable Risk 9,770 715 2,932,948 901,271 3,844,704 D- Significant Risk - - 1,167,928 3,289,030 4,456,958 E- Unrecoverable Risk 52 - 564,728 1,853,520 2,418,300 Total 145,540,243 1,490,761 7,297,653 6,139,437 160,468,094 * Information on this table about NIC39..
Analysis of age of financial assets that are past due but not impaired [text block]	The following table shows the loans and financial leases according to past due days. A loans or financial leases is considered past due if it is more than one month overdue (i.e. 31 days): December 31, 2018 Past-due Period 0 - 30 Days 31 - 90 Days 91 - 120 Days 121 - 360 Days More Than 360 Days Total In millions of COP Commercial 90,804,138 452,890 152,877 1,387,364 1,803,379 94,600,648 Consumer 30,311,854 701,314 238,540 638,868 102,805 31,993,381 Mortgage 21,121,205 612,480 148,786 388,653 599,561 22,870,685 Financial Leases 22,433,190 209,840 54,029 245,974 255,171 23,198,204 Small Business Loan 1,008,378 48,849 16,202 60,103 22,666 1,156,198 Total 165,678,765 2,025,373 610,434 2,720,962 2,783,582 173,819,116 December 31, 2017 Past-due Period 0 - 30 Days 31 - 90 Days 91 - 120 Days 121 - 360 Days More Than 360 Days Total In millions of COP Commercial 85,747,936 570,412 130,613 1,573,899 974,381 88,997,241 Consumer 25,942,380 764,098 236,509 584,789 118,338 27,646,114 Mortgage 18,751,121 752,336 140,188 396,227 472,336 20,512,208 Financial Leases 21,480,161 215,685 61,700 238,030 253,375 22,248,951 Small Business Loan 916,298 39,178 12,753 70,977 24,374 1,063,580 Total 152,837,896 2,341,709 581,763 2,863,922 1,842,804 160,468,094
Disclosure Of Detailed Information About Impaired Loans And Financial Leases [Text Block]	The table below shows Stage 3 loans and advances according to their type of evaluation: December 31 2018 Impairment Individual Evaluation Collective Evaluation Carrying Amount ECL Carrying Amount ECL In millions of COP Commercial 4,970,415 2,583,874 2,782,603 1,904,866 Consumer 1,568,758 1,383,265 Mortgage 1,077,206 586,026 Financial Leases 795,862 339,418 901,216 367,072 Small Business Loan 116,902 79,981 Total 5,766,277 2,923,292 6,446,685 4,321,210 See provisions for loan losses for financial leases of the period in Note 6. December 31, 2017 Impairment Individual Evaluation Collective Evaluation Carrying Amount Allowance Carrying Amount Allowance In millions of COP Commercial 4,544,324 2,059,356 3,546,504 1,782,385 Consumer 10,839 10,839 2,337,640 1,403,499 Mortgage - - 1,115,785 489,414 Financial Leases 641,228 298,947 1,105,208 202,940 Small Business Loan - - 135,562 99,798 Total 5,196,391 2,369,142 8,240,699 3,978,036 See provisions for loan losses for financial leases of the period in Note 6.
Disclosure of detailed information about credit quality analysis of the group [Text Block]	Credit Quality Analysis of the Group Debt instruments Equity Derivatives (1) 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Low Risk 12,994,432 12,475,888 349,425 780,870 867,639 349,375 Medium Risk 1,639,484 1,842,454 1,749 - 135 181 High Risk 412,834 336,054 6496 10,939 429 1,679 Without Rating 698,781 205,027 1,282,278 728,504 25,798 106,705 Total 15,745,531 14,859,423 1,639,948 1,520,313 894,001 457,940 (1) For derivatives transactions counterparty risk is disclosed as long as the valuation is positive. Therefore, the value described here differs from the book value.
Disclosure of detailed information about maximum exposure level to the credit risk [Text Block]	 Maximum exposure level to the credit risk given for: Maximum Exposure Collateral * Net Exposure 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Debt instruments 15,745,530 14,859,423 (2,352,276) (2,741,345) 13,393,254 12,118,078 Derivatives ** 894,001 457,940 (97) (125,902) 893,905 332,038 Equity 1,639,949 1,520,313 - - 1,639,949 1,520,313 Total 18,279,480 16,837,676 (2,352,373) (2,867,247) 15,927,108 13,970,429 See Notes on this table: * Collateral Held (-) and Collateral Pledged (+) ** Exposure in Derivatives with base in MTM (only positive values), netting by counterparty is applied * Debt instruments Book value 100% * Equity Instruments: - Shares:100% - Investment funds: Book value 100%
Disclosure of detailed information about individual evaluation of impairment at the end of the period for other financial instruments [Text Block]	 The information corresponding to the individual evaluation of impairment at the end of the period for other financial instruments, is detailed as follows: Debt instruments Exposure Impairment Final Exposure 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Fair Value 12,251,872 10,701,855 3,053 - 12,248,819 10,701,855 Amortized Cost 3,493,657 4,158,766 11,730 1,198 3,481,928 4,157,568 Total 15,745,529 14,860,621 14,783 1,198 15,730,747 14,859,423 Equity Exposure Impairment Final Exposure 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Fair Value through profit or loss 1,101,461 990,788 - - 1,101,461 990,788 Fair Value through OCI 538,487 529,525 - - 538,487 529,525 Total 1,639,948 1,520,313 - - 1,639,948 1,520,313
Disclosure of detailed information about risk exposure by economic sector and risk country [Text Block]	Risk exposure by economic sector and risk region Debt instruments Equity Derivatives 2 2018 2017 2018 2017 2018 2017 Maximum Exposure to Credit Risk Sector Concentration Corporate 3,179,751 3,020,087 1,064,268 1,340,844 276,721 95,138 Financial 805,863 1,054,303 543,256 91,904 520,026 317,232 Government 11,757,757 10,785,033 - - - - Funds and ETF 2159 - 32,425 87,565 97,254 45,570 Total 15,745,530 14,859,423 1,639,949 1,520,313 894,001 457,940 Concentration by Region North America 1,569,943 710,592 1,472 8,658 279,132 130,303 Latam 14,175,587 12,643,832 1,613,783 1,494,750 475,243 294,237 Europe - - - - 119,126 33,400 Others (Includes Funds and ETF) - 1,504,999 24,694 16,905 20,501 - Total 15,745,530 14,859,423 1,639,949 1,520,313 894,002 457,940 1 GMRA: It is a model legal agreement designed for parties transacting repos and is published by the International Capital Market Association (ICMA), which is the body representing the bond and repo markets in Europe. 2 For derivatives transactions counterparty risk is disclosed as long as the valuation is positive. Therefore, the value described here differs from the book value.
Disclosure of internal credit grades [text block]	Risk exposure by credit rating Other financial instruments 2018 2017 Maximum Exposure to Credit Risk Sovereign Risk 6,879,344 6,939,944 AAA 4,304,103 3,901,870 AA+ 398,479 190,464 AA 22,615 91,636 AA- 180,757 60,422 A+ 23,800 96,822 A 328,597 86,607 A- 163,235 580,138 BBB+ 73,101 236,613 BBB 1,133,247 1,129,321 BBB- 704,216 292,296 Otros 2,061,126 2,191,307 Not rated 2,006,858 1,040,235 Total 18,279,478 16,837,675
Disclosure of detailed information about sensitivity of interest rate [Text Block]	Zone Band Modified Duration Changes in Interest Rates (bps) Lower Limit Upper Limit Legal Currency UVR Foreign Currency Zone 1 1 0 0.08 274 274 100 2 0.08 0.25 268 274 100 3 0.25 0.5 259 274 100 4 0.5 1 233 274 100 Zone 2 5 1 1.9 222 250 90 6 1.9 2.8 222 250 80 7 2.8 3.6 211 220 75 Zone 3 8 3.6 4.3 211 220 75 9 4.3 5.7 172 200 70 10 5.7 7.3 162 170 65 11 7.3 9.3 162 170 60 12 9.3 10.6 162 170 60 13 10.6 12 162 170 60 14 12 20 162 170 60 15 20 162 170 60
Disclosure of Currency risk explanatory [Text Block]	The VaR model uses a sensitivity factor to calculate the probability of loss due to fluctuations in the price of stocks, funds and currencies in which the Bank maintains a position. As previously indicated, the methodology used in these financial statements to measure such risk consists of computing VaR, which is derived by multiplying the position by the maximum probable variation in the price of such positions (“∆p”). The (“∆p”) is determined by the SFC, as shown in the following table: Currency Sensitivity Factor United States Dollar 12,49% Euro 11.00% Other currencies 13.02% Equity and Fund Risk 14.70%
Disclosure of market risk [text block]	The following table presents the total change on market risk and every risk factor. December 2018 In millions of COP Factor December 31 Average Maximum Minimum Interest Rate 249,070 241,602 317,524 204,478 Exchange Rate 909,648 712,435 909,648 563,322 Share Price 91,847 103,127 112,372 91,847 Collective Portfolios 196,819 192,920 198,227 187,842 Total Value at Risk 1,447,384 1,250,084 1,447,384 1,108,052 December 2017 In millions of COP Factor December 31 Average Maximum Minimum Interest Rate 283,548 289,811 303,876 269,572 Exchange Rate 559,362 488,395 883,924 330,108 Share Price 70,758 76,632 84,059 70,758 Collective Portfolios 173,236 156,335 174,373 34,558 Total Value at Risk 1,086,904 1,011,173 1,406,514 877,348
Disclosure of detailed information about interest rate risk sensitivity in local currency [Text Block]	The chart below provides information about Bancolombia’s interest rate risk sensitivity in local currency (COP) at December 31, 2018 and 2017: December 31, 2018 December 31, 2017 In millions of COP Assets sensitivity 50 bps 361,427 346,000 Liabilities sensitivity 50 bps 185,477 180,714 Net interest income sensitivity50 bps 175,950 165,286 The chart below provides information about Bancolombia’s interest rate risk sensitivity in foreign currency (US dollars) at December 31, 2018 and 2017: December 31, 2018 December 31, 2017 In millions of USD Assets sensitivity 50 bps 39 38 Liabilities sensitivity 50 bps 36 30 Net interest income sensitivity50 bps 3 8
Sensitivity analysis for types of market risk [text block]	Table 2. Share Price Sensitivity December 31, 2018 December 31, 2017 Fair Value 163,136 146,667 Delta 14,7% 14.70% Sensitivity 23,981 21,560
Disclosure of liquidity risk [text block]	The liquidity coverage ratio is presented as follows: Liquidity Coverage Ratio December 31, 2018 December 31, 2017 Net cash outflows into 30 days* 7,004,662 5,122,512 Liquid Assets 26,506,750 24,374,356 Liquidity coverage ratio 372.48% 475.83% * Net cash outflows into 30 days: (Interbank borrowings, Financial assets investments, Loans and advances to customers, Derivative financial instruments), minus 30 days contractual maturities of liabilities. Demand deposit Time deposits, Interbank deposits Borrowings from other financial institutions Debt instruments, Derivative financial instruments.
Disclosure of detailed information about liquid assets held by the bank [Text Block]	The following table shows the liquid assets held by Bank´s: Liquid Assets (1) December 31, 2018 December 31, 2017 High quality liquid assets* Cash 15,370,693 14,793,855 High quality liquid securities 9,268,481 7,963,343 Other Liquid Assets - Other securities** 1,867,576 1,617,158 Total Liquid Assets 26,506,750 24,374,356 (1) Feature possesses the high liquidity available in all cases, and those liquid assets received by the Central Bank for its operations expansion and monetary contraction. Liquid assets are adjusted by a haircut. The following are considered as liquid assets: cash, repos held for trading and investments held for trading in listed shares in Colombia’s stock exchange, in investment funds units or in other trading debt instruments. * High-quality liquid assets : cash and shares that are eligible to be reportable or repo operations, in addition to those liquid assets that the Central Bank receives for its monetary expansion and contraction operations described in paragraph 3.1.1 of the Foreign Regulatory Circular DODM-142 of the Bank of the Republic. ** Other Securities : Securities issued by financial and corporate entities.
Disclosure of detailed information about contractual maturities of principal and interest balances of financial assets [Text Block]	The tables below set out the remaining contractual maturities of principal and interest balances of the Group’s financial assets: Contractual maturities of financial assets December 31, 2018 Financial Assets 0 - 1 Year 1- 3 Years 3- 5 Years More than 5 years Cash and balances with central bank 15,833,017 Interbank borrowings - Repurchase agreements 2,965,646 Financial assets investments 7,512,098 4,557,121 2,585,777 3,608,511 Loans and advances to customers 61,653,720 52,485,542 33,393,032 59,347,861 Derivative financial instruments 1,073,804 174,475 486,746 247,268 Total financial assets 89,038,285 57,217,138 36,465,555 63,203,640 Contractual maturities of financial assets December 31, 2017 Financial Assets 0 - 1 Year 1- 3 Years 3- 5 Years More than 5 years Cash and balances with central bank 15,542,195 - - - Interbank borrowings - Repurchase agreements 2,805,467 - - - Financial assets investments 6,706,487 5,258,546 3,107,856 1,931,710 Loans and advances to customers 54,997,084 50,519,957 29,659,278 50,569,611 Derivative financial instruments 804,392 176,490 405,710 233,762 Total financial assets 80,855,625 55,954,993 33,172,844 52,735,083
Disclosure of detailed information about contractual maturities of principal and interest balances of financial liabilities [Text Block]	The tables below set out the remaining contractual maturities of principal and interest balances of the Bank’s financial liabilities: Contractual maturities of financial liabilities December 31, 2018 Financial Liabilities 0 - 1 Year 1- 3 Years 3- 5 Years More than 5 years Demand deposit from customers 85,275,330 - - - Time deposits from customers 39,104,963 14,120,231 5,096,152 2,037,330 Interbank deposits-Repurchase agreements 3,132,911 531,734 - - Borrowings from other financial institutions 11,149,381 2,952,158 1,158,784 1,844,290 Debt securities in issue 3,721,909 8,078,228 7,489,901 5,813,722 Derivative financial instruments 636,410 101,836 391,930 240,727 Total financial liabilities 143,020,904 25,784,187 14,136,767 9,936,069 Contractual maturities of financial liabilities December 31, 2017 Financial Liabilities 0 - 1 Year 1- 3 Years 3- 5 Years More than 5 years Demand deposit from customers 77,997,629 - - - Time deposits from customers 37,755,690 12,085,796 6,053,016 2,134,245 Interbank deposits - Repurchase agreements 3,861,258 524,880 - - Borrowings from other financial institutions 8,709,585 2,824,456 1,379,194 1,961,015 Debt securities in issue 3,210,313 5,676,708 8,460,302 8,050,023 Derivative financial instruments 670,817 117,485 383,380 229,804 Total financial liabilities 132,205,292 21,229,325 16,275,892 12,375,087
Disclosure of detailed information about contractual maturities of financial guarantees [Text Block]	The tables below set out the remaining contractual maturities of the Group’s financial guarantees December 31, 2018 0 - 1 Year 1- 3 Years 3- 5 Years More than 5 years In millions of COP Financial guarantees 3,370,845 1,426,992 277,710 177,828 December 31, 2017 0 - 1 Year 1- 3 Years 3- 5 Years More than 5 years In millions of COP Financial guarantees 5,137,205 1,224,061 149,238 191,139
Disclosure of compliance of regulatory capital and capital adequacy ratios [Text Block]	In spite of the above, the management has directed its efforts towards the equity strengthening as shown in table below. As of December 31, 2018 December 31 2017 In millions of COP Regulatory Capital and Capital Adequacy Ratios Basic Ordinary Equity 23,965,972 22,221,965 Deductions Basic Ordinary Equity (4,251,247) (4,189,222) Total Basic Ordinary Equity 19,714,725 18,032,743 Additional Equity 6,704,144 7,143,524 Total Regulatory Capital 26,418,869 25,176,267 Capital Ratios Primary capital to risk-weighted assets (Tier 1) 10.05% 10.15% Secondary capital to risk-weighted assets 3.42% 4.03% Technical capital to risk-weighted assets (Tier 2) 13.47% 14.18%
Disclosure Of Detailed Information About Maximum Exposure Level To Collateral [Text Block]	Level of collateral held: Collateral* Main type of collateral 2018 2017 2018 2017 Maximum Exposure to Credit Risk Debt instruments (2,352,276) (2,741,345) Government bonds (TES) and term deposits Government Bonds (TES) Derivatives (97) (125,902) Cash Cash Equity - - Total (2,352,373) (2,867,247) See Notes on this table: * Collateral Held (-) and Collateral Pledged (+)
Disclosure of Detailed Information about financial assets and related collateral held in order to mitigate potential losses Table Text Block [Table Text Block]	Financial assets that are considered Stage 3 and related collateral held in order to mitigate potential losses are shown below: December 31, 2018 In Millions of COP Classification Amount Allowance Total Fair Value of Collateral Commercial 775,689 239,720 535,968 2,528,495 Consumer Mortgage 139,084 21,883 117,201 173,482 Small Business Loans Financial Leases 666,495 201,981 464,514 974,274 Total credit assets 1,581,268 463,584 1,117,683 3,676,251
Disclosure of Detailed Information about changes in the expected loss due to changes in macroeconomic variables Table Text Block [Table Text Block]	The following table shows how a change of 1% increase or decrease in these economic variables could affect the weighted expected loss as of December 31, 2018. Fiscal Balance, Current Acount and Inflation In Milllions of COP [+1%] Without changes [-1%] GDP Growth [+1%] (30,929) (18,726) (5,841) Without changes (12,204) 0 12,885 [-1%] 22,749 34,953 47,838

IMPACTS ON APPLICATION OF NEW_2

IMPACTS ON APPLICATION OF NEW STANDARDS (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure of expected impact of initial application of new standards or interpretations [abstract]
Disclosure of detailed information about the impact on adoption of IFRS 9 [Table Text Block]	The measurement categories and carrying amount for financial instruments as of December 31, 2018, under IFRS 9 (2013) and the new categories in IFRS 9 (2014) are shown below: Note Original classification under IFRS 9 (2013) New Classification under IFRS 9 (2014) Original carrying amount under IFRS 9 (2013) New carrying amount under IFRRS 9 (2014) Impact to equity Financial assets Cash and cash equivalents 4 Amortized cost Amortized cost 18,165,644 18,165,644 - Debt securities (a) 5.1 FVTPL FVOCI 2,105,230 2,106,468 1,238 Debt securities 5.1 FVTPL FVTPL 8,596,625 8,596,947 322 Debt securities (b) 5.1 Amortized cost FVOCI 850,535 884,884 34,349 Debt securities (c) 5.1 Amortized cost FVTPL 176,229 180,976 4,747 Debt securities 5.1 Amortized cost Amortized cost 3,130,804 3,121,981 (8,823) Equity securities 5.2 FVTPL FVTPL 988,455 988,455 - Equity securities 5.2 FVOCI FVOCI 529,375 529,375 - Derivatives 5.3 FVTPL FVTPL 1,134,372 1,134,372 - Loans and financial leases 6 Amortized cost Amortized cost 152,244,991 151,209,930 (1,035,061) Total financial Assets 187,922,260 186,919,032 (1,003,228) Note Original classification under IFRS 9 (2013) New Classification under IFRS 9 (2014) Original carrying amount under IFRS 9 (2013) New carrying amount under IFRRS 9 (2014) Impact to equity financial liabilities Customer deposits 14 Amortized cost Amortized cost 131,959,215 131,959,215 - Interbank 15 Amortized cost Amortized cost 1,084,591 1,084,591 - Repos 15 Amortized cost Amortized cost 3,236,128 3,236,128 - Derivatives 5.2 FVTPL FVTPL 945,853 945,853 - Financial liabilities 16 Amortized cost Amortized cost 13,822,152 13,822,152 - Issued debt securities 17 Amortized cost Amortized cost 19,648,714 19,704,624 (55,910) Other liabilities 20 N/A N/A 151,789 139,999 11,790 Total financial liabilities 170,848,442 170,892,562 (44,120) The application of revised accounting policies responsive to IFRS 9 resulted in the following adjustments: (a) LETES (El Salvador Public Treasury Bills) issued by the Government of El Salvador which amounted to COP 129,962, bonds issued by the Government of Guatemala to COP 206,031, bonds issued by The Republic of Panama to COP 923,787 and treasury bonds of the United States of America to COP ( 475,428 (b) Bonds issued by the Government of Guatemala which amounted to COP 558,516 and term deposit certificates in foreign currency to COP 292,019 (c) Bonds issued by the Guatemalan Government which amounted to COP 166,608 and corporate bonds of other Guatemalan issuers to COP 9,621
Disclosure of detailed information about reconciliation of the carrying amount and measurement categories in accordance with IFRS 9 [Table Text Block]	The reconciliation of the carrying amount and measurement categories between IFRS 9 (2013) and IFRS 9 (2014) as of January 1, 2017 for debt instruments is described below: Closing balance as of December 31, 2017 under IFRS 9 (2013) Reclassification Remeasurement (1) Opening balance as of January 1, 2018 under IFRS 9 (2014) Debt instruments at fair value Through profit or loss Initial balance 10,701,855 - 322 10,702,177 Reclassification to fair value through other comprehensive income (OCI) (2,105,230) - (2,105,230) Reclassification from Amortized cost 176,229 4,747 180,976 Final balance 10,701,855 (1,929,001) 5,069 8,777,923 Debt instruments measured at amortized cost Initial balance 4,157,568 - (8,823) 4,148,745 Reclassification to fair through profit or loss (176,229) - (176,229) Reclassification to fair value through other comprehensive income (OCI) (850,535) - (850,535) Final balance 4,157,568 (1,026,764) (8,823) 3,121,981 Debt instruments measured at fair value through other comprehensive income Initial balance - - - - Reclassification from fair value through profit or loss 2,105,230 1,238 2,106,468 Reclassification from amortized cost 850,535 34,349 884,884 Final balance - 2,955,765 35,587 2,991,352 Total changes in balances, reclassifications and re-measurements of financial assets 14,859,423 - 31,833 14,891,256 (1) The effects presented contain changes due to the measurement of investment from Amortized cost to fair value and new loss allowance for credit risk of those instruments classified as amortized cost
Disclosure of detailed information about the impact on allowance for credit losses under the incurred loss model and the expected credit losses model in accordance with IFRS 9 [Table Text Block]	Impairment: The impact of the allowance for credit losses at the end of 2017, under the incurred loss model of IAS 39 and the new allowance under the expected credit losses model determined in accordance with IFRS 9 to January 1, 2018, is presented below: December 31, 2017 under IAS 39 Remeasurement January 1, 2018 under IFRS 9 Financial Instruments Impairment of loan portfolio at amortized cost and financial leasing operations 8,223,103 1,035,061 9,258,164 Impairment of debt instruments at amortized cost 1,201 8,823 10,024 Impairment of debt instruments at fair value through other comprehensive income - 5,705 5,705 Other liabilities (loan commitments and guarantees) 151,789 (11,790) 139,999 Total allowance for credit losses 8,376,093 1,037,799 9,413,892
Disclosure of detailed information about the impact on retained arising from a change in measurement attribute on the entitys transition to IFRS 9 [Table Text Block]	Retained earnings: The following table analyses the impact of transition to IFRS 9 on Retained earnings: Impact of adopting IFRS 9 (2014) In millions of COP Retained earnings Closing balance as of 31 December 2017 under IFRS 9 (2013) 3,568,182 Recognition of expected credit losses under IFRS 9 (2014) for debt instruments at FVOCI (4,837) Recognition of expected credit losses under IFRS 9 (2014) for debt instruments at Amortized cost (8,736) Reclassification of investments in Debt instruments 24,126 Recognition of expected credit losses under IFRS 9 (2014) for loans and financial leases (948,785) Recognition of expected credit losses under IFRS 9 (2014) for Financial guarantees and loan commitments 16,990 Recognition of Debt modifications that do not result in derecognition (55,910) Diferred tax 245,512 Total impact to retained earnings (731,640) Opening balance as of (01 January 2018) under IFRS 9 (2014) 2,836,542 Non-controling interest (18,141) Effect of adoption of IFRS 9 (2014) in retained earnings (749,781)

SIGNIFICANT ACCOUNTING POLICI_4

SIGNIFICANT ACCOUNTING POLICIES (Details)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fiduciaria Bancolombia S.A. Sociedad Fiduciaria [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Trust
Proportion of ownership interest in subsidiary		98.81%	98.81%	98.81%
Banca de Inversion Bancolombia S.A. Corporacion Financiera [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Investment banking
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Valores Bancolombia S.A. Comisionista de Bolsa [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Securities brokerage
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Renting Colombia S.A.S (Before Renting Colombia S.A.) [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Operating leasing
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Transportempo S.A.S. [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Transportation
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Valores Simesa S.A. [Member]
Country of incorporation of subsidiary	[1]	Colombia
The type of business of subsidiary	[1]	Investments
Proportion of ownership interest in subsidiary	[1]	67.73%	68.57%	68.57%
Inversiones CFNS S.A.S. [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Investments
Proportion of ownership interest in subsidiary		99.94%	99.94%	99.94%
BIBA Inmobiliaria S.A.S. [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Real estate broker
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
FCP Fondo Colombia Inmobiliario. [Member]
Country of incorporation of subsidiary	[2]	Colombia
The type of business of subsidiary	[2]	Real estate broker
Proportion of ownership interest in subsidiary	[2]	51.29%	63.47%	62.55%
Prosicol S.A.S. In liquidation [Member]
Country of incorporation of subsidiary	[3]	Colombia
The type of business of subsidiary	[3]	Pre-operating stage
Proportion of ownership interest in subsidiary	[3]	0.00%	0.00%	68.57%
Fideicomiso Lote Abelardo Castro. [Member]
Country of incorporation of subsidiary		Colombia
The type of business of subsidiary		Mercantil trust
Proportion of ownership interest in subsidiary		67.39%	68.23%	68.23%
Bancolombia Panama S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Sistemas de Inversiones y Negocios S.A. Sinesa [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Investments
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Banagricola S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Investments
Proportion of ownership interest in subsidiary		99.16%	99.16%	99.16%
Banistmo S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Banistmo Investment Corporation S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Trust
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Financomer S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Financial services
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Leasing Banistmo S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Leasing
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Valores Banistmo S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Purchase and sale of securities
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Suvalor Panama Fondos de Inversion S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Holding
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Suvalor Renta Fija Internacional Largo Plazo S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Collective investment fund
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Suvalor Renta Fija Internacional Corto Plazo S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Collective investment fund
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Banistmo Asset Management Inc. [Member]
Country of incorporation of subsidiary	[4]	Panama
The type of business of subsidiary	[4]	Purchase and sale of securities
Proportion of ownership interest in subsidiary	[4]	0.00%	0.00%	100.00%
Banistmo Capital Markets Group Inc. [Member]
Country of incorporation of subsidiary	[5]	Panama
The type of business of subsidiary	[5]	Purchase and sale of securities
Proportion of ownership interest in subsidiary	[5]	100.00%	100.00%	100.00%
Van Dyke Overseas Corp. [Member]
Country of incorporation of subsidiary	[6]	Panama
The type of business of subsidiary	[6]	Real estate broker
Proportion of ownership interest in subsidiary	[6]	0.00%	100.00%	100.00%
Inmobiliaria Bickford S.A. [Member]
Country of incorporation of subsidiary	[6]	Panama
The type of business of subsidiary	[6]	Real estate broker
Proportion of ownership interest in subsidiary	[6]	0.00%	100.00%	100.00%
Williamsburg International Corp. [Member]
Country of incorporation of subsidiary	[6]	Panama
The type of business of subsidiary	[6]	Real estate broker
Proportion of ownership interest in subsidiary	[6]	0.00%	100.00%	100.00%
Anavi Investment Corporation S.A. [Member]
Country of incorporation of subsidiary	[5]	Panama
The type of business of subsidiary	[5]	Real estate broker
Proportion of ownership interest in subsidiary	[5]	100.00%	100.00%	100.00%
Desarrollo de Oriente S.A. [Member]
Country of incorporation of subsidiary	[5]	Panama
The type of business of subsidiary	[5]	Real estate broker
Proportion of ownership interest in subsidiary	[5]	100.00%	100.00%	100.00%
Steens Enterpresies S.A. [Member]
Country of incorporation of subsidiary	[5]	Panama
The type of business of subsidiary	[5]	Portfolio holder
Proportion of ownership interest in subsidiary	[5]	100.00%	100.00%	100.00%
Ordway Holdings S.A. [Member]
Country of incorporation of subsidiary	[5]	Panama
The type of business of subsidiary	[5]	Real estate broker
Proportion of ownership interest in subsidiary	[5]	100.00%	100.00%	100.00%
Grupo Agromercantil Holding S.A. [Member]
Country of incorporation of subsidiary		Panama
The type of business of subsidiary		Holding
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Banco Agricola S.A. [Member]
Country of incorporation of subsidiary		El Salvador
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		97.36%	97.36%	97.36%
Arrendadora Financiera S.A. Arfinsa [Member]
Country of incorporation of subsidiary		El Salvador
The type of business of subsidiary		Leasing
Proportion of ownership interest in subsidiary		97.37%	97.37%	97.36%
Credibac S.A. de C.V. [Member]
Country of incorporation of subsidiary		El Salvador
The type of business of subsidiary		Credit card services
Proportion of ownership interest in subsidiary		97.36%	97.36%	97.36%
Valores Banagricola S.A. de C.V. [Member]
Country of incorporation of subsidiary		El Salvador
The type of business of subsidiary		Securities brokerage
Proportion of ownership interest in subsidiary		98.89%	98.89%	98.89%
Inversiones Financieras Banco Agricola S.A. IFBA [Member]
Country of incorporation of subsidiary		El Salvador
The type of business of subsidiary		Investments
Proportion of ownership interest in subsidiary		98.89%	98.89%	98.89%
Gestora de Fondos de Inversion Banagricola S.A. [Member]
Country of incorporation of subsidiary		El Salvador
The type of business of subsidiary		Administers investment funds
Proportion of ownership interest in subsidiary		98.89%	98.89%	98.89%
Arrendamiento Operativo CIB S.A.C. [Member]
Country of incorporation of subsidiary	[7]	Peru
The type of business of subsidiary	[7]	Operating leasing
Proportion of ownership interest in subsidiary	[7]	100.00%	100.00%	100.00%
Fondo de Inversion en Arrendamiento Operativo Renting Peru [Member]
Country of incorporation of subsidiary	[8]	Peru
The type of business of subsidiary	[8]	Car Rental
Proportion of ownership interest in subsidiary	[8]	0.00%	100.00%	100.00%
Capital Investments SAFI S.A. [Member]
Country of incorporation of subsidiary	[8]	Peru
The type of business of subsidiary	[8]	Trust
Proportion of ownership interest in subsidiary	[8]	0.00%	100.00%	100.00%
FiduPeru S.A. Sociedad Fiduciaria [Member]
Country of incorporation of subsidiary	[7]	Peru
The type of business of subsidiary	[7]	Trust
Proportion of ownership interest in subsidiary	[7]	98.81%	98.81%	98.81%
Leasing Peru S.A. [Member]
Country of incorporation of subsidiary	[8]	Peru
The type of business of subsidiary	[8]	Leasing
Proportion of ownership interest in subsidiary	[8]	0.00%	100.00%	100.00%
Banagricola Guatemala S.A. [Member]
Country of incorporation of subsidiary	[8]	Guatemala
The type of business of subsidiary	[8]	Outsourcing
Proportion of ownership interest in subsidiary	[8]	0.00%	99.16%	99.16%
Banco Agromercantil de Guatemala S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Seguros Agromercantil de Guatemala S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Insurance company
Proportion of ownership interest in subsidiary		59.17%	59.17%	59.17%
Financiera Agromercantil S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Financial services
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Agrovalores S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Securities brokerage
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Tarjeta Agromercantil S.A. In liquidation [Member]
Country of incorporation of subsidiary	[8]	Guatemala
The type of business of subsidiary	[8]	Credit Card
Proportion of ownership interest in subsidiary	[8]	0.00%	60.00%	60.00%
Arrendadora Agromercantil S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Operating Leasing
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Agencia de Seguros y Fianzas Agromercantil S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Insurance company
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Asistencia y Ajustes S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Services
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Serproba S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Maintenance and remodelling services
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Servicios de Formalizacion S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Loans formalization
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Conserjeria, Mantenimiento y Mensajeria S.A. [Member]
Country of incorporation of subsidiary		Guatemala
The type of business of subsidiary		Maintenance services
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Media Plus S.A. [Member]
Country of incorporation of subsidiary	[9]	Guatemala
The type of business of subsidiary	[9]	Advertising and marketing
Proportion of ownership interest in subsidiary	[9]	0.00%	60.00%	60.00%
Mercom Bank Ltd. [Member]
Country of incorporation of subsidiary		Barbados
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
New Alma Enterprises Ltd. [Member]
Country of incorporation of subsidiary		Bahamas
The type of business of subsidiary		Investments
Proportion of ownership interest in subsidiary		60.00%	60.00%	60.00%
Bancolombia Puerto Rico Internacional Inc. [Member]
Country of incorporation of subsidiary		Puerto Rico
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Bancolombia Cayman S.A. [Member]
Country of incorporation of subsidiary		Cayman Islands
The type of business of subsidiary		Banking
Proportion of ownership interest in subsidiary		100.00%	100.00%	100.00%
Bagricola Costa Rica S.A. [Member]
Country of incorporation of subsidiary		Costa Rica
The type of business of subsidiary		Outsourcing
Proportion of ownership interest in subsidiary		99.16%	99.16%	99.16%
[1]	The decrease in the shareholding is due to the repurchase of outstanding stock by the subsidiary.
[2]	During 2018, the Bank's shareholding decreased in the subsidiary's capitalization process.
[3]	Investment sold by Valores Simesa during 2017.
[4]	Investment absorbed by Banistmo Capital Markets Group, Inc. during 2017.
[5]	Investments in non-operational stage.
[6]	Investment absorbed by Banistmo Capital Markets Group, Inc. during 2018.
[7]	Investment classified as assets held for sale. See Note 12 Assets held for sale and Inventories.
[8]	Investment liquidated during 2018.
[9]	Investment liquidated during 2018.

SIGNIFICANT ACCOUNTING POLICI_5

SIGNIFICANT ACCOUNTING POLICIES (Details 1) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Assets	$ 220,113,618	$ 203,908,211
FCP Fondo Colombia Inmobiliario [Member]
Country of incorporation of subsidiary	Colombia
Proportion of ownership interest in subsidiary	51.29%	63.47%	62.55%
Assets	$ 3,205,133	$ 2,698,224	$ 2,009,382
Fideicomiso Lote Abelardo Castro. [Member]
Country of incorporation of subsidiary	Colombia
Proportion of ownership interest in subsidiary	67.39%	68.23%	68.23%
Assets	$ 11,616	$ 10,343
Suvalor Panama Fondo de Inversion [Member]
Country of incorporation of subsidiary	Panamá
Proportion of ownership interest in subsidiary	100.00%	100.00%	100.00%
Assets	$ 244	$ 224
Fondo de Inversion en Arrendamiento Operativo Renting Peru [Member]
Country of incorporation of subsidiary	Perú
Proportion of ownership interest in subsidiary	0.00%	100.00%	100.00%
Assets	$ 0	$ 0

SIGNIFICANT ACCOUNTING POLICI_6

SIGNIFICANT ACCOUNTING POLICIES (Details 2) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Disclosure of Significant Accounting Policies [Line Items]
Assets		$ 220,113,618	$ 203,908,211
Liabilities		193,458,393	179,478,661
Equity		26,655,225	24,429,550		$ 22,476,980		$ 20,407,919
Profits of equity method investees		341,795	266,170	[1]	176,692	[2]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		10,446,284	10,463,407	[1]	9,695,705	[2]
Total fees and commission, net		1,213,056	1,075,115	[1]	968,970	[2]
Other expenses		267,507	249,023		258,265
Other operating income		1,203,802	1,578,209	[1]	1,466,655	[2]
Operating expense		(7,482,898)	(7,226,058)	[1]	(6,970,581)	[2]
Income tax		829,435	1,238,598		1,176,832
Net Income		2,786,435	2,754,173		2,954,947
Net cash (used in) provided by operating activities		1,042,858	2,939,588		3,601,418
Net cash (used in) provided by investing activities		(1,381,842)	(1,908,080)		(1,027,627)
Net cash (used in) provided by financing activities	[3]	(732,711)	(3,620,909)		(343,839)
Cash and cash equivalents at beginning of year		18,165,644	20,460,245		18,805,577
Cash and cash equivalents at end of year		18,730,810	18,165,644		20,460,245
Investments at fair value through OCI		(33,838)	(38,884)		(232,617)
Translation adjustment		1,043,593	412,878		(672,684)
Total other comprehensive income		677,354	470,110		(136,965)
FCP Fondo Colombia Inmobiliario S.A. [Member]
Disclosure of Significant Accounting Policies [Line Items]
Assets		3,205,133	2,698,224		2,009,382
Liabilities		963,841	1,048,867		655,315
Net assets		2,241,292	1,649,357		1,354,067
Valuation of investment properties		70,933	81,816		52,543
Valuation of trust rights		29,161	53,143		12,903
Rents		147,324	135,135		120,811
Profits of equity method investees		96,201	144,146		0
Other Income		6,940	4,493		2,616
Total Income		350,559	418,733		188,873
Interest on loans		67,593	68,900		67,558
Other expenses		121,162	86,270		49,078
Total Expenses		189,309	155,492		125,640
Net Income		161,250	263,241		63,233
Net cash (used in) provided by operating activities		(351)	(394)		(372)
Net cash (used in) provided by investing activities		0	0		0
Net cash (used in) provided by financing activities		334	409		375
Cash and cash equivalents at beginning of year		18	3		0
Cash and cash equivalents at end of year		1	18		3
Trust fees		554	322		9,004
Grupo Agromercantil Holding [Member]
Disclosure of Significant Accounting Policies [Line Items]
Assets		13,556,250	12,191,869		11,795,358
Liabilities		12,209,984	10,847,895		10,477,427
Equity		1,346,266	1,343,974		1,317,931
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		388,932	389,463		393,972
Total fees and commission, net		111,932	101,565		58,745
Other operating income		52,286	54,246		55,942
Dividends received and equity method		579	608		779
Total operating income, net		553,729	545,882		509,438
Operating expense		(458,277)	(445,038)		(435,430)
Income tax		(15,910)	(21,546)		(11,197)
Net Income		79,542	79,298		62,811
Net cash (used in) provided by operating activities		(66,235)	192,850		(136,878)
Net cash (used in) provided by investing activities		244,949	(1,427)		(4,157)
Net cash (used in) provided by financing activities		(2,983)	(87,103)		(77,684)
Cash and cash equivalents at beginning of year		1,324,893	1,098,861		1,359,176
Cash and cash equivalents at end of year		1,500,624	1,324,893		1,098,861
Investments at fair value through OCI		(6,598)	2,241		3,682
Translation adjustment		43,803	15,758		(64,195)
Others		(3,922)	(3,042)		6,959
Total other comprehensive income		$ 33,283	$ 14,957		$ (53,554)
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[3]	For further information about the reconciliation of the balances of liabilities from financing activities, see Note 28. Liabilities from financing activities.

SIGNIFICANT ACCOUNTING POLICI_7

SIGNIFICANT ACCOUNTING POLICIES (Details 3)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of Significant Accounting Policies [Abstract]
Closing exchange rate	3,249.75	2,984	3,000.71
Average rate for the period ended at	2,956.55	2,951.21	3,053.20

SIGNIFlCANT ACCOUNTING POLICIES

SIGNIFlCANT ACCOUNTING POLICIES (Details 4)	12 Months Ended
	Dec. 31, 2018
Percentage Of Loans And Receivables	89.00%
Commercial Loans [Member]
Percentage Of Loans And Receivables	89.20%
Mortgages [Member]
Percentage Of Loans And Receivables	88.20%
Consumer loans [member]
Percentage Of Loans And Receivables	88.90%
Stage Two [Member]
Percentage Of Loans And Receivables	4.20%
Stage Two [Member] | Commercial Loans [Member]
Percentage Of Loans And Receivables	3.10%
Stage Two [Member] | Mortgages [Member]
Percentage Of Loans And Receivables	7.20%
Stage Two [Member] | Consumer loans [member]
Percentage Of Loans And Receivables	5.90%
Stage Two [Member] | Threshold [Member]
Percentage Of Loans And Receivables	48.10%
Stage Two [Member] | Threshold [Member] | Commercial Loans [Member]
Percentage Of Loans And Receivables	29.50%
Stage Two [Member] | Threshold [Member] | Mortgages [Member]
Percentage Of Loans And Receivables	65.50%
Stage Two [Member] | Threshold [Member] | Consumer loans [member]
Percentage Of Loans And Receivables	67.40%
Stage Two [Member] | Watchlist [Member]
Percentage Of Loans And Receivables	30.70%
Stage Two [Member] | Watchlist [Member] | Commercial Loans [Member]
Percentage Of Loans And Receivables	61.40%
Stage Two [Member] | Watchlist [Member] | Mortgages [Member]
Percentage Of Loans And Receivables	0.00%
Stage Two [Member] | Watchlist [Member] | Consumer loans [member]
Percentage Of Loans And Receivables	0.80%
Stage Two [Member] | Restructured [Member]
Percentage Of Loans And Receivables	7.10%
Stage Two [Member] | Restructured [Member] | Commercial Loans [Member]
Percentage Of Loans And Receivables	3.60%
Stage Two [Member] | Restructured [Member] | Mortgages [Member]
Percentage Of Loans And Receivables	11.30%
Stage Two [Member] | Restructured [Member] | Consumer loans [member]
Percentage Of Loans And Receivables	9.70%
Stage Two [Member] | More Than Thirty Days [Member]
Percentage Of Loans And Receivables	14.10%
Stage Two [Member] | More Than Thirty Days [Member] | Commercial Loans [Member]
Percentage Of Loans And Receivables	5.50%
Stage Two [Member] | More Than Thirty Days [Member] | Mortgages [Member]
Percentage Of Loans And Receivables	23.10%	[1]
Stage Two [Member] | More Than Thirty Days [Member] | Consumer loans [member]
Percentage Of Loans And Receivables	22.10%
Stage Three [Member]
Percentage Of Loans And Receivables	6.80%
Stage Three [Member] | Commercial Loans [Member]
Percentage Of Loans And Receivables	7.70%
Stage Three [Member] | Mortgages [Member]
Percentage Of Loans And Receivables	4.70%
Stage Three [Member] | Consumer loans [member]
Percentage Of Loans And Receivables	5.30%
[1]	The significant increase credit risk for Banistmo's mortgage portfolio is 60 days past due.

SIGNIFlCANT ACCOUNTING POLICI_2

SIGNIFlCANT ACCOUNTING POLICIES (Details 5)	12 Months Ended
	Dec. 31, 2018USD ($)
Year One [Member]
GDP growth	1.80%
Inflation	4.10%
Monetary Policy Rate	4.80%
Unemployment	9.60%
Exchange Rate	2992.00%
Exports	$ 37,385
Imports	$ 46,076
Year Two [Member]
GDP growth	2.60%
Inflation	3.40%
Monetary Policy Rate	4.30%
Unemployment	9.30%
Exchange Rate	3060.00%
Exports	$ 43,035
Imports	$ 50,140
Year Three [Member]
GDP growth	3.20%
Inflation	3.40%
Monetary Policy Rate	4.80%
Unemployment	8.80%
Exchange Rate	3130.00%
Exports	$ 47,290
Imports	$ 54,960
Year Four [Member]
GDP growth	3.40%
Inflation	3.20%
Monetary Policy Rate	5.30%
Unemployment	8.70%
Exchange Rate	3260.00%
Exports	$ 46,072
Imports	$ 59,352
Year Five [Member]
GDP growth	3.10%
Inflation	3.10%
Monetary Policy Rate	5.00%
Unemployment	8.60%
Exchange Rate	3320.00%
Exports	$ 44,548
Imports	$ 60,539
Year Six [Member]
GDP growth	3.30%
Inflation	3.00%
Monetary Policy Rate	4.80%
Unemployment	8.50%
Exchange Rate	3370.00%
Exports	$ 48,213
Imports	$ 62,658
Year seven [Member]
GDP growth	3.40%
Inflation	3.00%
Monetary Policy Rate	4.80%
Unemployment	8.30%
Exchange Rate	3430.00%
Exports	$ 52,574
Imports	$ 65,791
Base Scenario | Panama [Member] | Year One [Member]
GDP growth	5.40%
Inflation	0.40%
Unemployment	6.00%
Exports	$ 24,933
Imports	$ 26,961
Current Account Deficit	(8.00%)
Base Scenario | Panama [Member] | Year Two [Member]
GDP growth	3.70%
Inflation	1.00%
Unemployment	6.50%
Exports	$ 27,973
Imports	$ 28,370
Current Account Deficit	(5.80%)
Base Scenario | Panama [Member] | Year Three [Member]
GDP growth	5.10%
Inflation	1.40%
Unemployment	7.20%
Exports	$ 29,997
Imports	$ 29,651
Current Account Deficit	(4.10%)
Base Scenario | Panama [Member] | Year Four [Member]
GDP growth	4.90%
Inflation	1.50%
Unemployment	7.50%
Exports	$ 30,947
Imports	$ 30,897
Current Account Deficit	(4.00%)
Base Scenario | Panama [Member] | Year Five [Member]
GDP growth	4.60%
Inflation	1.60%
Unemployment	7.90%
Exports	$ 31,647
Imports	$ 32,271
Current Account Deficit	(3.00%)
Base Scenario | Panama [Member] | Year Six [Member]
GDP growth	4.50%
Inflation	1.70%
Unemployment	8.20%
Exports	$ 32,247
Imports	$ 33,417
Current Account Deficit	(3.60%)
Base Scenario | Panama [Member] | Year seven [Member]
GDP growth	4.60%
Inflation	1.80%
Unemployment	8.50%
Exports	$ 32,537
Imports	$ 34,664
Current Account Deficit	(3.50%)
Base Scenario | Salvador [Member] | Year One [Member]
GDP growth	2.30%
Inflation	2.00%
Exports	$ 5,760
Imports	$ 10,593
Current Account Deficit	(2.00%)
Fiscal Budget Balance	(2.30%)
Base Scenario | Salvador [Member] | Year Two [Member]
GDP growth	2.70%
Inflation	1.90%
Exports	$ 5,939
Imports	$ 11,883
Current Account Deficit	(3.30%)
Fiscal Budget Balance	(2.30%)
Base Scenario | Salvador [Member] | Year Three [Member]
GDP growth	2.50%
Inflation	1.80%
Exports	$ 6,355
Imports	$ 12,714
Current Account Deficit	(3.40%)
Fiscal Budget Balance	(2.40%)
Base Scenario | Salvador [Member] | Year Four [Member]
GDP growth	2.20%
Inflation	1.90%
Exports	$ 6,884
Imports	$ 13,370
Current Account Deficit	(3.50%)
Fiscal Budget Balance	(2.20%)
Base Scenario | Salvador [Member] | Year Five [Member]
GDP growth	2.00%
Inflation	1.90%
Exports	$ 7,264
Imports	$ 13,911
Current Account Deficit	(3.60%)
Fiscal Budget Balance	(2.20%)
Base Scenario | Salvador [Member] | Year Six [Member]
GDP growth	2.10%
Inflation	1.90%
Exports	$ 7,746
Imports	$ 14,416
Current Account Deficit	(3.50%)
Fiscal Budget Balance	(2.10%)
Base Scenario | Salvador [Member] | Year seven [Member]
GDP growth	2.20%
Inflation	2.00%
Exports	$ 8,255
Imports	$ 14,964
Current Account Deficit	(3.40%)
Fiscal Budget Balance	(2.10%)
Base Scenario | Guatemala [Member] | Year One [Member]
GDP growth	2.80%
Inflation	5.70%
Exchange Rate	7.34%
Exports	$ 10,983
Imports	$ 18,389
Fiscal Budget Balance	(3.70%)
Base Scenario | Guatemala [Member] | Year Two [Member]
GDP growth	3.00%
Inflation	4.20%
Exchange Rate	7.77%
Exports	$ 10,730
Imports	$ 19,171
Fiscal Budget Balance	(1.70%)
Base Scenario | Guatemala [Member] | Year Three [Member]
GDP growth	3.30%
Inflation	4.00%
Exchange Rate	7.90%
Exports	$ 10,369
Imports	$ 18,937
Fiscal Budget Balance	(1.60%)
Base Scenario | Guatemala [Member] | Year Four [Member]
GDP growth	3.20%
Inflation	3.70%
Exchange Rate	8.00%
Exports	$ 10,354
Imports	$ 18,816
Fiscal Budget Balance	(1.40%)
Base Scenario | Guatemala [Member] | Year Five [Member]
GDP growth	3.00%
Inflation	4.40%
Exchange Rate	8.09%
Exports	$ 10,769
Imports	$ 19,399
Fiscal Budget Balance	(1.30%)
Base Scenario | Guatemala [Member] | Year Six [Member]
GDP growth	3.20%
Inflation	4.30%
Exchange Rate	8.19%
Exports	$ 11,199
Imports	$ 20,563
Fiscal Budget Balance	(1.20%)
Base Scenario | Guatemala [Member] | Year seven [Member]
GDP growth	3.30%
Inflation	4.20%
Exchange Rate	8.28%
Exports	$ 11,569
Imports	$ 21,242
Fiscal Budget Balance	(1.20%)
Optimistic Scenario | Republic Of Colombia [Member] | Year One [Member]
GDP growth	1.80%
Inflation	4.10%
Monetary Policy Rate	4.80%
Unemployment	9.60%
Exchange Rate	2992.00%
Exports	$ 37,385
Imports	$ 46,076
Optimistic Scenario | Republic Of Colombia [Member] | Year Two [Member]
GDP growth	2.70%
Inflation	3.10%
Monetary Policy Rate	4.00%
Unemployment	9.30%
Exchange Rate	3010.00%
Exports	$ 44,483
Imports	$ 51,927
Optimistic Scenario | Republic Of Colombia [Member] | Year Three [Member]
GDP growth	3.90%
Inflation	3.10%
Monetary Policy Rate	4.30%
Unemployment	8.70%
Exchange Rate	3000.00%
Exports	$ 49,381
Imports	$ 57,541
Optimistic Scenario | Republic Of Colombia [Member] | Year Four [Member]
GDP growth	4.70%
Inflation	2.70%
Monetary Policy Rate	4.50%
Unemployment	8.40%
Exchange Rate	3070.00%
Exports	$ 48,275
Imports	$ 64,841
Optimistic Scenario | Republic Of Colombia [Member] | Year Five [Member]
GDP growth	4.30%
Inflation	2.60%
Monetary Policy Rate	4.30%
Unemployment	8.20%
Exchange Rate	3090.00%
Exports	$ 46,630
Imports	$ 63,825
Optimistic Scenario | Republic Of Colombia [Member] | Year Six [Member]
GDP growth	4.30%
Inflation	2.60%
Monetary Policy Rate	4.00%
Unemployment	8.00%
Exchange Rate	3110.00%
Exports	$ 50,338
Imports	$ 66,443
Optimistic Scenario | Republic Of Colombia [Member] | Year seven [Member]
GDP growth	4.60%
Inflation	2.50%
Monetary Policy Rate	4.00%
Unemployment	7.70%
Exchange Rate	3130.00%
Exports	$ 54,700
Imports	$ 69,576
Optimistic Scenario | Panama [Member] | Year One [Member]
GDP growth	5.40%
Inflation	0.40%
Monetary Policy Rate	6.00%
Exports	$ 24,933
Imports	$ 26,961
Current Account Deficit	(8.00%)
Optimistic Scenario | Panama [Member] | Year Two [Member]
GDP growth	4.10%
Inflation	1.00%
Monetary Policy Rate	6.20%
Exports	$ 28,373
Imports	$ 28,170
Current Account Deficit	(5.80%)
Optimistic Scenario | Panama [Member] | Year Three [Member]
GDP growth	5.40%
Inflation	1.30%
Monetary Policy Rate	7.10%
Exports	$ 30,597
Imports	$ 28,751
Current Account Deficit	(3.90%)
Optimistic Scenario | Panama [Member] | Year Four [Member]
GDP growth	5.20%
Inflation	1.50%
Monetary Policy Rate	7.30%
Exports	$ 31,347
Imports	$ 29,697
Current Account Deficit	(3.60%)
Optimistic Scenario | Panama [Member] | Year Five [Member]
GDP growth	4.90%
Inflation	1.60%
Monetary Policy Rate	7.60%
Exports	$ 32,047
Imports	$ 31,071
Current Account Deficit	(2.70%)
Optimistic Scenario | Panama [Member] | Year Six [Member]
GDP growth	4.80%
Inflation	1.60%
Monetary Policy Rate	7.90%
Exports	$ 32,767
Imports	$ 32,217
Current Account Deficit	(2.70%)
Optimistic Scenario | Panama [Member] | Year seven [Member]
GDP growth	4.90%
Inflation	1.60%
Monetary Policy Rate	8.00%
Exports	$ 33,097
Imports	$ 33,464
Current Account Deficit	(2.40%)
Optimistic Scenario | Salvador [Member] | Year One [Member]
GDP growth	2.30%
Inflation	2.00%
Exports	$ 5,760
Imports	$ 10,593
Current Account Deficit	(2.00%)
Fiscal Budget Balance	(2.30%)
Optimistic Scenario | Salvador [Member] | Year Two [Member]
GDP growth	3.20%
Inflation	2.40%
Exports	$ 5,969
Imports	$ 11,935
Current Account Deficit	(3.10%)
Fiscal Budget Balance	(0.80%)
Optimistic Scenario | Salvador [Member] | Year Three [Member]
GDP growth	3.60%
Inflation	2.40%
Exports	$ 6,503
Imports	$ 12,987
Current Account Deficit	(3.00%)
Fiscal Budget Balance	(0.90%)
Optimistic Scenario | Salvador [Member] | Year Four [Member]
GDP growth	3.50%
Inflation	2.70%
Exports	$ 7,055
Imports	$ 13,670
Current Account Deficit	(3.10%)
Fiscal Budget Balance	(0.80%)
Optimistic Scenario | Salvador [Member] | Year Five [Member]
GDP growth	3.20%
Inflation	2.90%
Exports	$ 7,455
Imports	$ 14,228
Current Account Deficit	(3.20%)
Fiscal Budget Balance	(0.80%)
Optimistic Scenario | Salvador [Member] | Year Six [Member]
GDP growth	3.40%
Inflation	3.10%
Exports	$ 7,952
Imports	$ 14,744
Current Account Deficit	(3.10%)
Fiscal Budget Balance	(0.80%)
Optimistic Scenario | Salvador [Member] | Year seven [Member]
GDP growth	3.50%
Inflation	3.20%
Exports	$ 8,472
Imports	$ 15,304
Current Account Deficit	(3.00%)
Fiscal Budget Balance	(0.80%)
Optimistic Scenario | Guatemala [Member] | Year One [Member]
GDP growth	2.80%
Inflation	5.70%
Exchange Rate	7.34%
Exports	$ 10,983
Imports	$ 18,389
Fiscal Budget Balance	(3.70%)
Optimistic Scenario | Guatemala [Member] | Year Two [Member]
GDP growth	3.20%
Inflation	3.70%
Exchange Rate	7.50%
Exports	$ 10,798
Imports	$ 19,259
Fiscal Budget Balance	(1.20%)
Optimistic Scenario | Guatemala [Member] | Year Three [Member]
GDP growth	4.40%
Inflation	3.50%
Exchange Rate	7.52%
Exports	$ 10,656
Imports	$ 19,290
Fiscal Budget Balance	(0.90%)
Optimistic Scenario | Guatemala [Member] | Year Four [Member]
GDP growth	4.40%
Inflation	2.80%
Exchange Rate	7.50%
Exports	$ 10,642
Imports	$ 19,169
Fiscal Budget Balance	(0.80%)
Optimistic Scenario | Guatemala [Member] | Year Five [Member]
GDP growth	4.40%
Inflation	3.20%
Exchange Rate	7.51%
Exports	$ 11,056
Imports	$ 19,752
Fiscal Budget Balance	(0.70%)
Optimistic Scenario | Guatemala [Member] | Year Six [Member]
GDP growth	4.40%
Inflation	3.40%
Exchange Rate	7.51%
Exports	$ 11,719
Imports	$ 20,443
Fiscal Budget Balance	(0.70%)
Optimistic Scenario | Guatemala [Member] | Year seven [Member]
GDP growth	4.40%
Inflation	3.30%
Exchange Rate	7.53%
Exports	$ 12,235
Imports	$ 21,343
Fiscal Budget Balance	(0.70%)
Pessimistic Scenario | Republic Of Colombia [Member] | Year One [Member]
GDP growth	1.80%
Inflation	4.10%
Monetary Policy Rate	4.80%
Unemployment	9.60%
Exchange Rate	2992.00%
Exports	$ 37,385
Imports	$ 46,076
Pessimistic Scenario | Republic Of Colombia [Member] | Year Two [Member]
GDP growth	2.40%
Inflation	3.70%
Monetary Policy Rate	4.50%
Unemployment	9.40%
Exchange Rate	3140.00%
Exports	$ 40,310
Imports	$ 48,272
Pessimistic Scenario | Republic Of Colombia [Member] | Year Three [Member]
GDP growth	2.50%
Inflation	4.00%
Monetary Policy Rate	5.30%
Unemployment	9.10%
Exchange Rate	3360.00%
Exports	$ 41,973
Imports	$ 52,285
Pessimistic Scenario | Republic Of Colombia [Member] | Year Four [Member]
GDP growth	2.60%
Inflation	3.70%
Monetary Policy Rate	5.80%
Unemployment	9.00%
Exchange Rate	3600.00%
Exports	$ 40,307
Imports	$ 56,570
Pessimistic Scenario | Republic Of Colombia [Member] | Year Five [Member]
GDP growth	2.10%
Inflation	3.60%
Monetary Policy Rate	5.50%
Unemployment	9.00%
Exchange Rate	3740.00%
Exports	$ 39,946
Imports	$ 57,905
Pessimistic Scenario | Republic Of Colombia [Member] | Year Six [Member]
GDP growth	2.10%
Inflation	3.60%
Monetary Policy Rate	5.30%
Unemployment	9.10%
Exchange Rate	3860.00%
Exports	$ 42,985
Imports	$ 59,961
Pessimistic Scenario | Republic Of Colombia [Member] | Year seven [Member]
GDP growth	2.10%
Inflation	3.50%
Monetary Policy Rate	5.30%
Unemployment	9.00%
Exchange Rate	3990.00%
Exports	$ 47,347
Imports	$ 63,094
Pessimistic Scenario | Panama [Member] | Year One [Member]
GDP growth	5.40%
Inflation	0.40%
Unemployment	6.00%
Exports	$ 24,933
Imports	$ 26,961
Current Account Deficit	(8.00%)
Pessimistic Scenario | Panama [Member] | Year Two [Member]
GDP growth	3.60%
Inflation	1.00%
Unemployment	6.90%
Exports	$ 28,197
Imports	$ 28,370
Current Account Deficit	(5.80%)
Pessimistic Scenario | Panama [Member] | Year Three [Member]
GDP growth	4.70%
Inflation	1.70%
Unemployment	7.60%
Exports	$ 29,197
Imports	$ 30,851
Current Account Deficit	(4.80%)
Pessimistic Scenario | Panama [Member] | Year Four [Member]
GDP growth	4.50%
Inflation	1.90%
Unemployment	7.90%
Exports	$ 29,647
Imports	$ 32,097
Current Account Deficit	(4.50%)
Pessimistic Scenario | Panama [Member] | Year Five [Member]
GDP growth	4.20%
Inflation	1.90%
Unemployment	8.30%
Exports	$ 30,047
Imports	$ 33,471
Current Account Deficit	(4.30%)
Pessimistic Scenario | Panama [Member] | Year Six [Member]
GDP growth	4.10%
Inflation	2.00%
Unemployment	8.60%
Exports	$ 30,147
Imports	$ 34,617
Current Account Deficit	(4.40%)
Pessimistic Scenario | Panama [Member] | Year seven [Member]
GDP growth	4.20%
Inflation	2.20%
Unemployment	8.90%
Exports	$ 31,737
Imports	$ 35,864
Current Account Deficit	(4.50%)
Pessimistic Scenario | Salvador [Member] | Year One [Member]
GDP growth	2.30%
Inflation	2.00%
Exports	$ 5,760
Imports	$ 10,593
Current Account Deficit	(2.00%)
Fiscal Budget Balance	(2.30%)
Pessimistic Scenario | Salvador [Member] | Year Two [Member]
GDP growth	2.30%
Inflation	1.50%
Exports	$ 5,910
Imports	$ 11,832
Current Account Deficit	(3.30%)
Fiscal Budget Balance	(3.50%)
Pessimistic Scenario | Salvador [Member] | Year Three [Member]
GDP growth	1.80%
Inflation	1.10%
Exports	$ 6,207
Imports	$ 12,442
Current Account Deficit	(3.70%)
Fiscal Budget Balance	(3.80%)
Pessimistic Scenario | Salvador [Member] | Year Four [Member]
GDP growth	1.40%
Inflation	1.10%
Exports	$ 6,712
Imports	$ 13,070
Current Account Deficit	(3.80%)
Fiscal Budget Balance	(3.60%)
Pessimistic Scenario | Salvador [Member] | Year Five [Member]
GDP growth	1.10%
Inflation	1.00%
Exports	$ 7,073
Imports	$ 13,594
Current Account Deficit	(3.90%)
Fiscal Budget Balance	(3.50%)
Pessimistic Scenario | Salvador [Member] | Year Six [Member]
GDP growth	1.30%
Inflation	0.80%
Exports	$ 7,541
Imports	$ 14,087
Current Account Deficit	(3.80%)
Fiscal Budget Balance	(3.40%)
Pessimistic Scenario | Salvador [Member] | Year seven [Member]
GDP growth	1.40%
Inflation	0.70%
Exports	$ 8,039
Imports	$ 14,623
Current Account Deficit	(3.70%)
Fiscal Budget Balance	(3.50%)
Pessimistic Scenario | Guatemala [Member] | Year One [Member]
GDP growth	2.80%
Inflation	5.70%
Exchange Rate	7.34%
Exports	$ 10,983
Imports	$ 18,389
Fiscal Budget Balance	3.70%
Pessimistic Scenario | Guatemala [Member] | Year Two [Member]
GDP growth	2.70%
Inflation	4.80%
Exchange Rate	8.03%
Exports	$ 10,662
Imports	$ 19,083
Fiscal Budget Balance	2.20%
Pessimistic Scenario | Guatemala [Member] | Year Three [Member]
GDP growth	2.10%
Inflation	4.80%
Exchange Rate	8.28%
Exports	$ 10,082
Imports	$ 18,584
Fiscal Budget Balance	1.90%
Pessimistic Scenario | Guatemala [Member] | Year Four [Member]
GDP growth	2.00%
Inflation	4.30%
Exchange Rate	8.49%
Exports	$ 10,067
Imports	$ 18,463
Fiscal Budget Balance	1.80%
Pessimistic Scenario | Guatemala [Member] | Year Five [Member]
GDP growth	2.00%
Inflation	4.70%
Exchange Rate	8.67%
Exports	$ 10,481
Imports	$ 19,046
Fiscal Budget Balance	1.70%
Pessimistic Scenario | Guatemala [Member] | Year Six [Member]
GDP growth	2.00%
Inflation	5.00%
Exchange Rate	8.86%
Exports	$ 10,901
Imports	$ 19,999
Fiscal Budget Balance	1.80%
Pessimistic Scenario | Guatemala [Member] | Year seven [Member]
GDP growth	2.00%
Inflation	4.90%
Exchange Rate	9.03%
Exports	$ 11,119
Imports	$ 20,399
Fiscal Budget Balance	1.80%

SIGNIFICANT ACCOUNTING POLICI_8

SIGNIFICANT ACCOUNTING POLICIES (Details 6)	Dec. 31, 2018Notches
BA One Or BB Plus [Member]
Number Of Investment Notches	3
BA Two Or BB [Member]
Number Of Investment Notches	3
BA Three Or BB Negative [Member]
Number Of Investment Notches	3
B One Or B Plus [Member]
Number Of Investment Notches	2
B Two Or B [Member]
Number Of Investment Notches	2
B Three Or B Negative [Member]
Number Of Investment Notches	1
Caa Or Ccc [Member]
Number Of Investment Notches	1

SIGNIFICANT ACCOUNTING POLICI_9

SIGNIFICANT ACCOUNTING POLICIES (Details 7)	12 Months Ended
	Dec. 31, 2018
12-month expected credit losses [member]
Information on how entity determined whether credit risk of financial instruments recognized initially	12-month expected credit losses
Lifetime expected credit losses [member]
Information on how entity determined whether credit risk of financial instruments has increased significantly since initial recognition	Lifetime expected credit losses
Information on how entity determined that financial assets are credit-impaired financial assets	Lifetime expected credit losses

SIGNIFICANT ACCOUNTING POLIC_10

SIGNIFICANT ACCOUNTING POLICIES (Details 8)	12 Months Ended
	Dec. 31, 2018
Consumer [member]
Disclosure of Significant Accounting Policies [Line Items]
Loans Write off, Delinquency Conditions	180 days, 450 days for vehicles in GAH, 720 days for loans with mortgage guarantee in Banco Agricola
Commercial [Member]
Disclosure of Significant Accounting Policies [Line Items]
Loans Write off, Delinquency Conditions	360 days
Small Business Loan [Member]
Disclosure of Significant Accounting Policies [Line Items]
Loans Write off, Delinquency Conditions	180 days, 720 days for loans with guarantee in Banistmo
Mortgage [member]
Disclosure of Significant Accounting Policies [Line Items]
Loans Write off, Delinquency Conditions	For Banistmo and Banco Agrícola from 720 days. GAH 1440 days.

SIGNIFICANT ACCOUNTING POLIC_11

SIGNIFICANT ACCOUNTING POLICIES (Details 9)	12 Months Ended
	Dec. 31, 2018
Buildings [member]
Disclosure of Significant Accounting Policies [Line Items]
Useful lives or depreciation rates, property, plant and equipment	10 to 75 years
Furniture and fixtures [member]
Disclosure of Significant Accounting Policies [Line Items]
Useful lives or depreciation rates, property, plant and equipment	5 to 20 years
Computer equipment [member]
Disclosure of Significant Accounting Policies [Line Items]
Useful lives or depreciation rates, property, plant and equipment	3 to 20 years
Equipment and machinery [member]
Disclosure of Significant Accounting Policies [Line Items]
Useful lives or depreciation rates, property, plant and equipment	3 to 40 years
Vehicles [Member]
Disclosure of Significant Accounting Policies [Line Items]
Useful lives or depreciation rates, property, plant and equipment	3 to 6 years

SIGNIFICANT ACCOUNTING POLIC_12

SIGNIFICANT ACCOUNTING POLICIES (Details Textual) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2016COP ($)	Oct. 31, 2016	Dec. 18, 2012
Profit (loss), attributable to non-controlling interests	$ 127,571		$ 139,173	$ 89,619
Non-controlling interests	$ 1,806,305		1,316,586
Percentage of voting equity interests acquired					50.00%
Dividends received from associates, classified as investing activities				38,036
Description of material leasing arrangements by lessee classified as operating lease	The agreement indicates that the lessee has the option to purchase the asset at a price that is expected to be equal to or less than 10% of the fair value of the asset upon termination of the lease. The term of the lease covers most of the economic life of the asset, i.e. when the minimum lease term represents 75% or more of the economic life of the leased asset. At the inception of the lease, the present value of the minimum lease payments amounts to at least 90% of the fair value of the leased asset. The leased assets are of such a specialized nature that only the lessee has the possibility of using them without making significant modifications.	The agreement indicates that the lessee has the option to purchase the asset at a price that is expected to be equal to or less than 10% of the fair value of the asset upon termination of the lease. The term of the lease covers most of the economic life of the asset, i.e. when the minimum lease term represents 75% or more of the economic life of the leased asset. At the inception of the lease, the present value of the minimum lease payments amounts to at least 90% of the fair value of the leased asset. The leased assets are of such a specialized nature that only the lessee has the possibility of using them without making significant modifications.
Preferred dividend as percentage of the subscription price	1.00%	1.00%
Effective interest rate of financial instruments	10.00%
Financial assets individually assessed for credit losses [member]
Minimum Amount of Loans to Be Individually Assessed	$ 5,000	$ 1.5
Financial assets individually assessed for credit losses [member] | Stage Three [Member]
Minimum Amount of Loans to Be Individually Assessed	$ 15,000	$ 5
Probability of default [member]
Expected credit loss rate	100.00%
Later than one month and not later than two months [member]
Expected credit loss rate	15.00%
Later than three months [member]
Expected credit loss rate	74.00%
Bottom of range [member]
Intangible Assets With Useful Life	1 year	1 year
Top of range [member]
Intangible Assets With Useful Life	10 years	10 years
Banistmo [Member]
Assets (liabilities)	$ 8,186,449
Bancolombia Panama [Member]
Assets (liabilities)			6,872,171
Capital reserve	$ 1,020,913		$ 616,814
CP Colombia Inmobiliario S.A. [Member]
Proportion of ownership interest in subsidiary	4871.00%	4871.00%	3653.00%
Profit (loss), attributable to non-controlling interests	$ 78,570		$ 96,179	23,701
Non-controlling interests	$ 1,091,802		$ 602,548	$ 507,115
Grupo Agromercantil Holding S.A. [Member]
Proportion of ownership interest in subsidiary	60.00%	60.00%	60.00%	60.00%
Percentage of voting equity interests acquired						40.00%
Dividends received from associates, classified as investing activities	$ 50,341		$ 39,482	$ 46,416

OPERATING SEGMENTS (Details)

OPERATING SEGMENTS (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Operating segments [Line Items]
Total interest and valuation		$ 16,116,500		$ 16,696,393		$ 15,748,805	[1]
Interest income on loans and financial leases		15,566,424		15,984,301	[2]	15,020,342	[1]
Total Debt investments		601,374		859,731	[2]	742,714	[1]
Derivatives		(22,575)		(61,667)	[2]	(4,750)	[1]
Total liquidity operations		(28,723)		(85,972)	[2]	(9,501)	[1]
Interest expenses		(5,670,216)		(6,232,986)	[2]	(6,053,100)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		10,446,284		10,463,407	[2]	9,695,705	[1]
Total credit impairment charges, net		(3,843,072)		(3,461,617)	[2]	(2,731,152)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		6,603,212		7,001,790	[2]	6,964,553	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		0		0	[2]	0	[1]
Fee and commission income		3,994,259	[3]	3,621,114	[2],[3]	3,299,933	[1],[4]
Fees and commission expenses		(1,213,056)		(1,075,115)	[2]	(968,970)	[1]
Total fees and commission income, net		2,781,203		2,545,999	[2]	2,330,963	[1]
Other operating income		1,203,802		1,578,209	[2]	1,466,655	[1]
Dividends received, and share of profits of equity method investees		341,795		266,170	[2]	176,692	[1]
Recovery (Impairment) charges on cash-generating unit		168,756		(173,339)	[2]
Total operating income, net		11,098,768		11,218,829	[2]	10,938,863	[1]
Operating expenses	[4]	(6,988,996)		(6,746,947)	[2]	(6,452,772)	[1]
Impairment, depreciation and amortization		493,902		479,111		517,809
Total operating expenses		(7,482,898)		(7,226,058)	[2]	(6,970,581)	[1]
Profit before tax		3,615,870		3,992,771	[2]	3,968,282	[1]
Banking Colombia [Member]
Operating segments [Line Items]
Total interest and valuation		12,215,644		12,995,017	[2]	11,586,785	[1]
Interest income on loans and financial leases		11,990,678		12,586,875	[2]	11,196,951	[1]
Total Debt investments		366,354		602,304	[2]	464,504	[1]
Derivatives		(17,023)		(54,156)	[2]	(10,197)	[1]
Total liquidity operations		(124,365)		(140,006)	[2]	(64,473)	[1]
Interest expenses		(4,194,772)		(4,791,976)	[2]	(4,542,701)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		8,020,872		8,203,041	[2]	7,044,084	[1]
Total credit impairment charges, net		(3,354,330)		(3,195,837)	[2]	(1,797,848)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		4,666,542		5,007,204	[2]	5,246,236	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		(6,986)		(59,884)	[2]	(65,915)	[1]
Fee and commission income		2,841,302	[3]	2,531,221	[2],[3]	2,063,018	[1],[4]
Fees and commission expenses		(1,009,573)		(889,481)	[2]	(767,655)	[1]
Total fees and commission income, net		1,831,729		1,641,740	[2]	1,295,363	[1]
Other operating income		250,598		608,025	[2]	569,326	[1]
Dividends received, and share of profits of equity method investees		(49,316)		(53,141)	[2]	(264,715)	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		6,692,567		7,143,944	[2]	6,780,295	[1]
Operating expenses	[4]	(4,902,500)		(4,715,976)	[2]	(4,142,515)	[1]
Impairment, depreciation and amortization		(177,779)		(147,262)	[2]	(147,261)	[1]
Total operating expenses		(5,080,279)		(4,863,238)	[2]	(4,289,776)	[1]
Profit before tax		1,612,288		2,280,706	[2]	2,490,519	[1]
Banking Panama [Member]
Operating segments [Line Items]
Total interest and valuation		1,573,928		1,495,446	[2]	1,399,852	[1]
Interest income on loans and financial leases		1,449,441		1,374,398	[2]	1,284,986	[1]
Total Debt investments		101,599		93,154	[2]	94,284	[1]
Derivatives		(13,250)		438	[2]	3,274	[1]
Total liquidity operations		36,138		27,456	[2]	17,308	[1]
Interest expenses		(558,126)		(523,312)	[2]	(457,611)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		1,015,802		972,134	[2]	942,241	[1]
Total credit impairment charges, net		(269,164)		(46,468)	[2]	(367,781)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		746,638		925,666	[2]	574,460	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		(30,634)		(26,837)	[2]	(20,600)	[1]
Fee and commission income		312,762	[3]	317,753	[2],[3]	291,853	[1],[4]
Fees and commission expenses		(120,520)		(112,986)	[2]	(111,590)	[1]
Total fees and commission income, net		192,242		204,767	[2]	180,263	[1]
Other operating income		39,781		8,662	[2]	18,851	[1]
Dividends received, and share of profits of equity method investees		4,240		7,038	[2]	4,692	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		952,267		1,119,296	[2]	757,666	[1]
Operating expenses	[4]	(554,890)		(569,219)	[2]	(589,535)	[1]
Impairment, depreciation and amortization		(55,127)		(55,197)	[2]	(62,459)	[1]
Total operating expenses		(610,017)		(624,416)	[2]	(651,994)	[1]
Profit before tax		342,250		494,880	[2]	105,672	[1]
Banking El Salvador [Member]
Operating segments [Line Items]
Total interest and valuation		931,405		882,806	[2]	901,757	[1]
Interest income on loans and financial leases		861,174		830,050	[2]	844,687	[1]
Total Debt investments		25,081		31,582	[2]	48,264	[1]
Derivatives		0		0	[2]	0	[1]
Total liquidity operations		45,150		21,174	[2]	8,806	[1]
Interest expenses		(252,351)		(256,994)	[2]	(252,011)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		679,054		625,812	[2]	649,746	[1]
Total credit impairment charges, net		(94,301)		(110,018)	[2]	(55,985)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		584,753		515,794	[2]	593,761	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		(2,029)		(963)	[2]	(3,054)	[1]
Fee and commission income		227,114	[3]	211,159	[2],[3]	203,623	[1],[4]
Fees and commission expenses		(43,216)		(40,325)	[2]	(45,361)	[1]
Total fees and commission income, net		183,898		170,834	[2]	158,262	[1]
Other operating income		4,842		(7,799)	[2]	1,302	[1]
Dividends received, and share of profits of equity method investees		1,894		324	[2]	711	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		773,358		678,190	[2]	750,982	[1]
Operating expenses	[4]	(402,831)		(383,002)	[2]	(390,309)	[1]
Impairment, depreciation and amortization		(26,122)		(34,671)	[2]	(50,323)	[1]
Total operating expenses		(428,953)		(417,673)	[2]	(440,632)	[1]
Profit before tax		344,405		260,517	[2]	310,350	[1]
Banking Guatemala [Member]
Operating segments [Line Items]
Total interest and valuation		894,934		865,038	[2]	869,329	[1]
Interest income on loans and financial leases		821,276		767,986	[2]	763,031	[1]
Total Debt investments		72,896		100,193	[2]	96,081	[1]
Derivatives		0		0	[2]	5,323	[1]
Total liquidity operations		762		(3,141)	[2]	4,894	[1]
Interest expenses		(360,988)		(348,726)	[2]	(348,219)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		533,946		516,312	[2]	521,110	[1]
Total credit impairment charges, net		(136,289)		(125,877)	[2]	(127,839)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		397,657		390,435	[2]	393,271	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		(7,574)		(972)	[2]	701	[1]
Fee and commission income		141,253	[3]	126,022	[2],[3]	81,737	[1],[4]
Fees and commission expenses		(29,320)		(24,457)	[2]	(22,992)	[1]
Total fees and commission income, net		111,933		101,565	[2]	58,745	[1]
Other operating income		52,287		54,246	[2]	55,942	[1]
Dividends received, and share of profits of equity method investees		580		608	[2]	779	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		554,883		545,882	[2]	509,438	[1]
Operating expenses	[4]	(373,279)		(343,646)	[2]	(323,001)	[1]
Impairment, depreciation and amortization		(84,996)		(101,392)	[2]	(112,429)	[1]
Total operating expenses		(458,275)		(445,038)	[2]	(435,430)	[1]
Profit before tax		96,608		100,844	[2]	74,008	[1]
Trust [Member]
Operating segments [Line Items]
Total interest and valuation		404		794	[2]	827	[1]
Interest income on loans and financial leases		0		0	[2]	0	[1]
Total Debt investments		105		193	[2]	283	[1]
Derivatives		0		0	[2]	0	[1]
Total liquidity operations		299		601	[2]	544	[1]
Interest expenses		(39)		(102)	[2]	(20)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		365		692	[2]	807	[1]
Total credit impairment charges, net		(826)		(549)	[2]	(164)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		(461)		143	[2]	643	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		(32,509)		(33,024)	[2]	(22,893)	[1]
Fee and commission income		313,908	[3]	285,648	[2],[3]	239,610	[1],[4]
Fees and commission expenses		(2,380)		(1,982)	[2]	(865)	[1]
Total fees and commission income, net		311,528		283,666	[2]	238,745	[1]
Other operating income		19,826		13,560	[2]	13,500	[1]
Dividends received, and share of profits of equity method investees		18,572		18,249	[2]	16,873	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		316,956		282,594	[2]	246,868	[1]
Operating expenses	[4]	(111,614)		(113,482)	[2]	(87,951)	[1]
Impairment, depreciation and amortization		(588)		(540)	[2]	(612)	[1]
Total operating expenses		(112,202)		(114,022)	[2]	(88,563)	[1]
Profit before tax		204,754		168,572	[2]	158,305	[1]
Investment banking [Member]
Operating segments [Line Items]
Total interest and valuation		22		94	[2]	136	[1]
Interest income on loans and financial leases		0		0	[2]	0	[1]
Total Debt investments		22		94	[2]	136	[1]
Derivatives		0		0	[2]	0	[1]
Total liquidity operations		0		0	[2]	0	[1]
Interest expenses		0		0	[2]	0	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		22		94	[2]	136	[1]
Total credit impairment charges, net		(135)		466	[2]	(423)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		(113)		560	[2]	(287)	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		20,187		16,209	[2]	12,891	[1]
Fee and commission income		20,271	[3]	28,747	[2],[3]	19,843	[1],[4]
Fees and commission expenses		(46)		(52)	[2]	(22)	[1]
Total fees and commission income, net		20,225		28,695	[2]	19,821	[1]
Other operating income		965		1,886	[2]	2,285	[1]
Dividends received, and share of profits of equity method investees		(67,990)		(70,114)	[2]	202,062	[1]
Recovery (Impairment) charges on cash-generating unit		173,339	[5]	(173,339)	[2],[6]
Total operating income, net		146,613		(196,103)	[2]	236,772	[1]
Operating expenses	[4]	(24,110)		(34,100)	[2]	(26,662)	[1]
Impairment, depreciation and amortization		(131)		(133)	[2]	(93)	[1]
Total operating expenses		(24,241)		(34,233)	[2]	(26,755)	[1]
Profit before tax		122,372		(230,336)	[2]	210,017	[1]
Brokerage [Member]
Operating segments [Line Items]
Total interest and valuation		24,273		8,916	[2]	17,160	[1]
Interest income on loans and financial leases		0		0	[2]	0	[1]
Total Debt investments		14,728		15,147	[2]	18,094	[1]
Derivatives		7,694		(7,661)	[2]	(2,113)	[1]
Total liquidity operations		1,851		1,430	[2]	1,179	[1]
Interest expenses		(15)		(72)	[2]	(33)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		24,258		8,844	[2]	17,127	[1]
Total credit impairment charges, net		155		(147)	[2]	(25)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		24,413		8,697	[2]	17,102	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		55,843		53,075	[2]	38,677	[1]
Fee and commission income		113,970	[3]	97,185	[2],[3]	80,571	[1],[4]
Fees and commission expenses		(2,734)		(482)	[2]	(511)	[1]
Total fees and commission income, net		111,236		96,703	[2]	80,060	[1]
Other operating income		(10,468)		(11,647)	[2]	(9,923)	[1]
Dividends received, and share of profits of equity method investees		(12,416)		12,278	[2]	32,567	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		168,608		159,106	[2]	158,483	[1]
Operating expenses	[4]	(98,687)		(101,255)	[2]	(110,317)	[1]
Impairment, depreciation and amortization		(1,402)		(1,398)	[2]	(1,980)	[1]
Total operating expenses		(100,089)		(102,653)	[2]	(112,297)	[1]
Profit before tax		68,519		56,453	[2]	46,186	[1]
Off shore [Member]
Operating segments [Line Items]
Total interest and valuation		547,878		444,649	[2]	442,107	[1]
Interest income on loans and financial leases		434,754		412,418	[2]	431,381	[1]
Total Debt investments		20,559		16,329	[2]	16,205	[1]
Derivatives		86,779		6,085	[2]	(7)	[1]
Total liquidity operations		5,786		9,817	[2]	(5,472)	[1]
Interest expenses		(247,666)		(226,304)	[2]	(252,030)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		300,212		218,345	[2]	190,077	[1]
Total credit impairment charges, net		19,039		6,541	[2]	(52,294)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		319,251		224,886	[2]	137,783	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		98,987		101,327	[2]	99,914	[1]
Fee and commission income		20,840	[3]	19,390	[2],[3]	30,263	[1],[4]
Fees and commission expenses		(3,408)		(2,874)	[2]	(3,253)	[1]
Total fees and commission income, net		17,432		16,516	[2]	27,010	[1]
Other operating income		15,668		6,428	[2]	16,453	[1]
Dividends received, and share of profits of equity method investees		(270,523)		(239,328)	[2]	(269,096)	[1]
Recovery (Impairment) charges on cash-generating unit		0		0	[2]
Total operating income, net		180,815		109,829	[2]	12,064	[1]
Operating expenses	[4]	(53,313)		(56,593)	[2]	(60,688)	[1]
Impairment, depreciation and amortization		(2,072)		(967)	[2]	(972)	[1]
Total operating expenses		(55,385)		(57,560)	[2]	(61,660)	[1]
Profit before tax		125,430		52,269	[2]	(49,596)	[1]
All other segments [Member]
Operating segments [Line Items]
Total interest and valuation		14,737		10,201	[2]	30,299	[1]
Interest income on loans and financial leases		9,049		13,000	[2]	25,819	[1]
Total Debt investments		32		735	[2]	3,145	[1]
Derivatives		0		(289)	[2]	(1,030)	[1]
Total liquidity operations		5,656		(3,245)	[2]	2,365	[1]
Interest expenses		(56,259)		(85,928)	[2]	(99,991)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		(41,522)		(75,727)	[2]	(69,692)	[1]
Total credit impairment charges, net		(7,221)		1,696	[2]	871	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		(48,743)		(74,031)	[2]	(68,821)	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		(95,285)		(48,931)	[2]	(39,721)	[1]
Fee and commission income		2,988	[3]	3,989	[2],[3]	1,699	[1],[4]
Fees and commission expenses		(1,859)		(2,476)	[2]	(1,526)	[1]
Total fees and commission income, net		1,129		1,513	[2]	173	[1]
Other operating income		912,738		885,182	[2]	888,529	[1]
Dividends received, and share of profits of equity method investees		(34,485)		(61,156)	[2]	(175,595)	[1]
Recovery (Impairment) charges on cash-generating unit		(4,583)		0	[2]
Total operating income, net		730,771		702,577	[2]	604,565	[1]
Operating expenses	[4]	(467,770)		(430,212)	[2]	(400,243)	[1]
Impairment, depreciation and amortization		(144,722)		(137,377)	[2]	(137,672)	[1]
Total operating expenses		(612,492)		(567,589)	[2]	(537,915)	[1]
Profit before tax		118,279		134,988	[2]	66,650	[1]
Total before elimination [Member]
Operating segments [Line Items]
Total interest and valuation		16,203,225		16,702,961	[2]	15,248,252	[1]
Interest income on loans and financial leases		15,566,372		15,984,727	[2]	14,546,855	[1]
Total Debt investments		601,376		859,731	[2]	740,996	[1]
Derivatives		64,200		(55,583)	[2]	(4,750)	[1]
Total liquidity operations		(28,723)		(85,914)	[2]	(34,849)	[1]
Interest expenses		(5,670,216)		(6,233,414)	[2]	(5,952,616)	[1]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		10,533,009		10,469,547	[2]	9,295,636	[1]
Total credit impairment charges, net		(3,843,072)		(3,470,193)	[2]	(2,401,488)	[1]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		6,689,937		6,999,354	[2]	6,894,148	[1]
Revenues (Expenses) from transactions with other operating segments of the Bank		0		0	[2]	0	[1]
Fee and commission income		3,994,408	[3]	3,621,114	[2],[3]	3,012,217	[1],[4]
Fees and commission expenses		(1,213,056)		(1,075,115)	[2]	(953,775)	[1]
Total fees and commission income, net		2,781,352		2,545,999	[2]	2,058,442	[1]
Other operating income		1,286,237		1,558,543	[2]	1,556,265	[1]
Dividends received, and share of profits of equity method investees		(409,444)		(385,242)	[2]	(451,722)	[1]
Recovery (Impairment) charges on cash-generating unit		168,756		(173,339)	[2]
Total operating income, net		10,516,838		10,545,315	[2]	10,057,133	[1]
Operating expenses	[4]	(6,988,994)		(6,747,485)	[2]	(6,131,221)	[1]
Impairment, depreciation and amortization		(492,939)		(478,937)	[2]	(513,801)	[1]
Total operating expenses		(7,481,933)		(7,226,422)	[2]	(6,645,022)	[1]
Profit before tax		3,034,905		3,318,893	[2]	3,412,111	[1]
Adjustments for consolidation [Member]
Operating segments [Line Items]
Total interest and valuation		(86,725)	[7]	(6,568)	[2]	500,553	[1],[7]
Interest income on loans and financial leases		52	[7]	(426)	[2]	473,487	[1],[7]
Total Debt investments		(2)	[7]	0	[2]	1,718	[1],[7]
Derivatives		(86,775)	[7]	(6,084)	[2]	0	[1],[7]
Total liquidity operations		0	[7]	(58)	[2]	25,348	[1],[7]
Interest expenses		0	[7]	428	[2]	(100,484)	[1],[7]
Net interest margin and valuation income on financial instruments before impairment on loans and financial leases and off balance sheet credit instruments		(86,725)	[7]	(6,140)	[2]	400,069	[1],[7]
Total credit impairment charges, net		0	[7]	8,576	[2]	(329,664)	[1],[7]
Net interest margin and valuation income on financial instruments after impairment on loans and financial leases and off balance sheet credit instruments		(86,725)	[7]	2,436	[2]	70,405	[1],[7]
Revenues (Expenses) from transactions with other operating segments of the Bank		0	[7]	0	[2]	0	[1],[7]
Fee and commission income	[7]	(149)	[3]	0	[2],[3]	287,716	[1],[4]
Fees and commission expenses		0	[7]	0	[2]	(15,195)	[1],[7]
Total fees and commission income, net		(149)	[7]	0	[2]	272,521	[1],[7]
Other operating income		(82,435)	[7]	19,666	[2]	(89,610)	[1],[7]
Dividends received, and share of profits of equity method investees		751,239	[7]	651,412	[2]	628,414	[1],[7]
Recovery (Impairment) charges on cash-generating unit		0	[7]	0	[2]
Total operating income, net		581,930	[7]	673,514	[2]	881,730	[1],[7]
Operating expenses	[7]	(2)		538	[2],[4]	(321,551)	[1],[4]
Impairment, depreciation and amortization		(963)	[7]	(174)	[2]	(4,008)	[1],[7]
Total operating expenses		(965)	[7]	364	[2]	(325,559)	[1],[7]
Profit before tax		$ 580,965	[7]	$ 673,878	[2]	$ 556,171	[1],[7]
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[3]	For further information about income from contracts with customers, see note 24.3. Fees and commissions.
[4]	Includes staff costs, other administration and general expenses, contributions and other tax burdens and others.
[5]	Includes imparment recovery in joint venture Compañía de Financiamiento Tuya S.A. For more information see Note 7 Investments in associates and joint ventures
[6]	Includes imparment recognition in joint venture Compañía de Financiamiento Tuya S.A. For more information see Note 7 Investments in associates and joint ventures
[7]	Includes provisions, dividends, gains on sales and non-controlling interest and reclassification according to the analysis process used by the CODM.

OPERATING SEGMENTS (Details 1)

OPERATING SEGMENTS (Details 1) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Operating segments [Line Items]
Total assets	$ 220,113,618	$ 203,908,211
Total liabilities	(193,458,393)	(179,478,661)
Banking Colombia [Member]
Operating segments [Line Items]
Total assets	149,185,338	142,207,844
Total liabilities	(132,722,635)	(125,534,492)
Banking Panama [Member]
Operating segments [Line Items]
Total assets	31,116,800	28,119,504
Total liabilities	(27,761,479)	(25,040,470)
Banking El Salvador [Member]
Operating segments [Line Items]
Total assets	14,704,427	12,978,363
Total liabilities	(12,963,237)	(11,318,266)
Banking Guatemala [Member]
Operating segments [Line Items]
Total assets	13,556,250	12,191,869
Total liabilities	(12,209,984)	(10,847,895)
Trust [Member]
Operating segments [Line Items]
Total assets	580,205	493,078
Total liabilities	(86,524)	(80,904)
Investment banking [Member]
Operating segments [Line Items]
Total assets	1,779,618	1,423,883
Total liabilities	(40,741)	(48,192)
Brokerage [Member]
Operating segments [Line Items]
Total assets	301,851	283,171
Total liabilities	(57,765)	(56,789)
Off shore [Member]
Operating segments [Line Items]
Total assets	17,963,675	16,503,973
Total liabilities	(12,640,349)	(12,284,687)
All other segments [Member]
Operating segments [Line Items]
Total assets	9,638,514	8,767,762
Total liabilities	(2,336,273)	(2,300,511)
Total before elimination [Member]
Operating segments [Line Items]
Total assets	238,826,678	222,969,447
Total liabilities	(200,818,987)	(187,512,206)
Adjustments for consolidation [Member]
Operating segments [Line Items]
Total assets	(18,713,060)	(19,061,236)
Total liabilities	7,360,594	8,033,545
Total after Before Elimination [Member]
Operating segments [Line Items]
Total assets	220,113,618	203,908,211
Total liabilities	$ (193,458,393)	$ (179,478,661)

OPERATING SEGMENTS (Details 2)

OPERATING SEGMENTS (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Operating segments [Line Items]
Investments in associates and joint ventures	$ 2,149,579	[1]	$ 1,565,059	[2]
Equity method	187,814		253,602		$ 60,254
Banking Colombia [Member]
Operating segments [Line Items]
Investments in associates and joint ventures	313,081	[1]	305,187	[2]
Equity method	32,859	[1]	45,976		34,425	[3]
Banking El Salvador [Member]
Operating segments [Line Items]
Investments in associates and joint ventures	13,544	[1]	10,532	[2]
Equity method	1,887	[1]	316		702	[3]
Trust [Member]
Operating segments [Line Items]
Investments in associates and joint ventures	230,211	[1]	226,761	[2]
Equity method	20,235	[1]	34,921		26,128	[3]
Investment banking [Member]
Operating segments [Line Items]
Investments in associates and joint ventures	451,113	[1]	248,156	[2]
Equity method	27,909	[1]	21,724		(3,923)	[3]
All other segment [Member]
Operating segments [Line Items]
Investments in associates and joint ventures	1,141,630	[1]	774,423	[2]
Equity method	$ 104,924	[1]	$ 150,665		$ 2,922	[3]
[1]	As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[2]	As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[3]	As of December 31, 2016, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.

OPERATING SEGMENTS (Details 3)

OPERATING SEGMENTS (Details 3) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	$ 399,993	$ 250,138	$ 404,185
Provisions	4,311,485	3,879,559	2,799,121
Banking Colombia [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	271,695	163,274	130,892
Provisions	3,679,839	3,422,531	2,130,261
Banking Panama [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	84,390	39,486	44,484
Provisions	342,528	165,651	381,531
Banking El Salvador [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	15,782	16,191	35,466
Provisions	145,661	162,877	104,864
Banking Guatemala [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	9,377	7,157	95,891
Provisions	153,484	138,297	127,370
Trust [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	0	0	0
Provisions	826	548	164
Investment banking [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	0	0	0
Provisions	135	(467)	423
Brokerage [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	0	0	0
Provisions	(155)	147	(34)
Off shore [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	6,376	0	0
Provisions	(17,973)	(4,449)	48,977
All other segments [Member]
Operating segments [Line Items]
Restructured loans that were transferred to foreclosed assets	12,373	24,030	97,452
Provisions	$ 7,140	$ (5,576)	$ 5,565

OPERATING SEGMENTS (Details 4)

OPERATING SEGMENTS (Details 4) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Operating segments [Line Items]
Interest and valuation		$ 16,116,500	$ 16,696,393	$ 15,748,805	[1]
Long-lived assets	[2]	12,332,027	11,214,617
Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		16,451,929	16,913,547	15,438,921
Long-lived assets	[2]	5,798,411	5,215,146
Segment Reconciling Items [Member]
Operating segments [Line Items]
Interest and valuation		(335,429)	(220,667)	309,884
Long-lived assets	[2]	6,533,616	5,999,471
Colombia [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		12,379,140	13,108,005	11,695,937
Long-lived assets	[2]	4,788,744	4,353,782
Panama [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		2,166,482	1,986,741	1,898,058
Long-lived assets	[2]	378,021	297,832
Puerto rico [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		77,917	68,556	56,519
Long-lived assets	[2]	321	388
Peru [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation	[3]	253	658	15,753
Long-lived assets	[2],[3]	165,076	115,840
EL SALVADOR [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		932,444	883,538	902,371
Long-lived assets	[2]	296,040	280,562
Costa Rica [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		0	0	0
Long-lived assets	[2]	131	80
Guatemala [Member] | Operating Segments [Member]
Operating segments [Line Items]
Interest and valuation		895,693	866,049	$ 870,283
Long-lived assets	[2]	$ 170,078	$ 166,662
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Included foreclosed assets, premises and equipment, investment property and goodwill presented within Other assets in the Consolidated Statement of Financial Position.
[3]	Investments in FiduPerú and Arrendamiento Operativo CIB S.A.C. are classified as Asset held for sale in the Consolidated Statement of Financial Position. For further information, see Note 12 Assets held for sale and inventories

OPERATING SEGMENTS (Details Tex

OPERATING SEGMENTS (Details Textual)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Operating Segment [Abstract]
Other Segments Revenue Percent	10.00%
Other Segments Assets Percent	10.00%

CASH AND CASH EQUIVALENTS (Deta

CASH AND CASH EQUIVALENTS (Details) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash and balances at central bank
Cash	$ 5,192,182		$ 5,099,252
Due from central banks	6,603,500	[1]	6,567,030
Due from other private financial entities	3,713,481		3,541,644
Checks on hold	216,323		141,370
Remittances of domestic negotiated checks in transit	107,531		173,827
Total cash and due from banks	15,833,017		15,523,123
Money market transactions:
Inter bank borrowings	1,965,973		1,761,460
Reverse repurchase agreements and other similar secured loans	931,820		881,061
Total money market transactions:	2,897,793		2,642,521
Total cash and cash equivalents	$ 18,730,810		$ 18,165,644	$ 20,460,245	$ 18,805,577
[1]	Includes dividend received for preferred shares in Compañía de Financiamiento TUYA S.A.

CASH AND CASH EQUIVALENTS (De_2

CASH AND CASH EQUIVALENTS (Details Textual) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
cash and cash equivalent [Line Items]
Restricted Cash and Cash Equivalents	$ 253,546	$ 192,036
Cash and cash equivalents	$ 18,730,810	18,165,644	$ 20,460,245	$ 18,805,577
Mandatory reserve percentage in central bank [Member]
cash and cash equivalent [Line Items]
Mandatory reserve percentage in central bank	4.50%
FiduPeru S.A. Sociedad Fiduciaria [Member]
cash and cash equivalent [Line Items]
Cash and cash equivalents	$ 5,830	12,951
Arrendamiento Operativo CIB S.A.C. [Member]
cash and cash equivalent [Line Items]
Cash and cash equivalents	$ 6,646	6,092
Capital Investments SAFI S.A. [Member]
cash and cash equivalent [Line Items]
Cash and cash equivalents		$ 29
Grupo Agromercantil Holding [Member]
cash and cash equivalent [Line Items]
Mandatory reserve percentage in central bank	14.60%
Bancolombia Panama S.A. and Banistmo S.A [Member]
cash and cash equivalent [Line Items]
Mandatory reserve percentage in central bank	30.00%
Bottom of range [member] | Banco Agricola [Member]
cash and cash equivalent [Line Items]
Mandatory reserve percentage in central bank	1.00%
Top of range [member] | Banco Agricola [Member]
cash and cash equivalent [Line Items]
Mandatory reserve percentage in central bank	25.00%

FINANCIAL ASSETS INVESTMENTS _3

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details) - COP ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		$ 17,361,475		$ 16,377,253
Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		15,721,527		14,859,423
Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		8,909,861		10,701,855
Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	3,329,738
Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,481,928		4,157,568
Trading equity securities [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,639,948		1,517,830
Trading equity securities [member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[2]	1,101,461		988,455
Trading equity securities [member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		538,487		529,375
Trading equity securities [member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Financial assets investments [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		17,361,475		16,377,253
Securities issued by the Colombian Government [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		7,292,411		7,016,112
Securities issued by the Colombian Government [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		7,242,168		7,003,147
Securities issued by the Colombian Government [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Securities issued by the Colombian Government [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		50,243		12,965
Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		7,242,168		7,003,147
Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		50,243		12,965
Securities issued by foreign governments [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		4,233,200		3,522,849
Securities issued by foreign governments [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		817,639		2,471,994
Securities issued by foreign governments [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,143,488
Securities issued by foreign governments [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		272,073		1,050,855
Securities issued by foreign governments [Member] | Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		272,073
Securities issued by foreign governments [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		817,639		2,471,994
Securities issued by foreign governments [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,143,488
Securities issued by foreign governments [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets				1,050,855
Securities issued by government entities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,919,106		1,962,592
Securities issued by government entities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		43,846		36,038
Securities issued by government entities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Securities issued by government entities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,875,260		1,926,554
Securities issued by government entities [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		43,846		36,038
Securities issued by government entities [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,875,260		1,926,554
Securities issued by other financial institutions [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		991,176	[3]	1,278,207
Securities issued by other financial institutions [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		661,176	[3]	1,052,776
Securities issued by other financial institutions [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[3]	186,250
Securities issued by other financial institutions [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		143,750	[3]	225,431
Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		661,176		1,052,776
Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		186,250
Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		143,750		225,431
Corporate bonds [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,285,634		1,079,663
Corporate bonds [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		145,032		137,900
Corporate bonds [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Corporate bonds [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,140,602		941,763
Corporate bonds [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		145,032		137,900
Corporate bonds [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		$ 1,140,602		$ 941,763
[1]	For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies.
[2]	The growth is mainly due to the increase of the Sura Assets Management fair value by COP 69,162 at the end of the year 2018. In accordance with the price conditions agreed with Caisse de Dépôt et Placement du Québec (CDPQ) for the sale of this investment, the total Bank’s shareholding will be sold for (USD 135,173) COP 439,279.
[3]	Includes mortgage-backed securities (TIPS) measured at fair value through profit or loss amounting to COP 196,920 and amortized cost amounting to COP 7. For further information on TIPS’ fair value measurement see Note 29 fair value of assets and liabilities.

FINANCIAL ASSETS INVESTMENTS _4

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 1) - COP ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		$ 17,361,475		$ 16,377,253
Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		15,721,527		14,859,423
Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		8,909,861		10,701,855
Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,481,928		4,157,568
Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	3,329,738
Securities issued by the Colombian Government [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		7,292,411		7,016,112
Securities issued by the Colombian Government [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		7,242,168		7,003,147
Securities issued by the Colombian Government [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		50,243		12,965
Securities issued by the Colombian Government [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		7,242,168		7,003,147
Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		50,243		12,965
Securities issued by Foreign Governments [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		4,233,200		3,522,849
Securities issued by Foreign Governments [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		817,639		2,471,994
Securities issued by Foreign Governments [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		272,073		1,050,855
Securities issued by Foreign Governments [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,143,488
Securities issued by Foreign Governments [Member] | Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		272,073
Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		817,639		2,471,994
Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets				1,050,855
Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,143,488
Securities issued by other financial institutions [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		991,176	[2]	1,278,207
Securities issued by other financial institutions [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		661,176	[2]	1,052,776
Securities issued by other financial institutions [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		143,750	[2]	225,431
Securities issued by other financial institutions [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[2]	186,250
Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		661,176		1,052,776
Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		143,750		225,431
Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		186,250
Securities issued by Government entities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,919,106		1,962,592
Securities issued by Government entities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		43,846		36,038
Securities issued by Government entities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,875,260		1,926,554
Securities issued by Government entities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		43,846		36,038
Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,875,260		1,926,554
Corporate bonds [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,285,634		1,079,663
Corporate bonds [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		145,032		137,900
Corporate bonds [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,140,602		941,763
Corporate bonds [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Corporate bonds [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		145,032		137,900
Corporate bonds [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,140,602		941,763
Less than 1 year [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		6,476,981		5,625,195
Less than 1 year [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,113,420		3,330,145
Less than 1 year [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		2,023,403		2,295,050
Less than 1 year [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	1,340,158
Less than 1 year [Member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		2,376,212		2,163,682
Less than 1 year [Member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		50,243		0
Less than 1 year [Member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		12,534
Less than 1 year [Member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		511,149		962,640
Less than 1 year [Member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets				241,944
Less than 1 year [Member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,334,351
Less than 1 year [Member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		169,615		157,434
Less than 1 year [Member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		85,366		117,075
Less than 1 year [Member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		5,807
Less than 1 year [Member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		27,905		11,134
Less than 1 year [Member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,875,260		1,909,363
Less than 1 year [Member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		28,539		35,255
Less than 1 year [Member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		26,668
Between 1 and 3 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,470,898		4,287,670
Between 1 and 3 years [member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		2,362,686		3,988,949
Between 1 and 3 years [member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		90,093		298,721
Between 1 and 3 years [member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	1,018,119
Between 1 and 3 years [member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		2,142,086		3,299,116
Between 1 and 3 years [member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		12,965
Between 1 and 3 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		9,897
Between 1 and 3 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		25,165		408,586
Between 1 and 3 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets				184,454
Between 1 and 3 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,018,119
Between 1 and 3 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		164,208		250,395
Between 1 and 3 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		23,650		68,166
Between 1 and 3 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Between 1 and 3 years [member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		10,488		14,825
Between 1 and 3 years [member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		17,191
Between 1 and 3 years [member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		20,739		16,027
Between 1 and 3 years [member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		56,546		15,945
Between 3 and 5 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,988,638		2,676,615
Between 3 and 5 years [member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,092,044		2,072,512
Between 3 and 5 years [member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		303,248		604,103
Between 3 and 5 years [member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	593,346
Between 3 and 5 years [member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		884,248		1,164,689
Between 3 and 5 years [member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		0
Between 3 and 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		2,661
Between 3 and 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		55,041		736,105
Between 3 and 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets				415,229
Between 3 and 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		593,346
Between 3 and 5 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		105,231		143,353
Between 3 and 5 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		34,734		40,190
Between 3 and 5 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0
Between 3 and 5 years [member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		109		6,946
Between 3 and 5 years [member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		0
Between 3 and 5 years [member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		47,415		21,419
Between 3 and 5 years [member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		265,853		148,684
Greater than 5 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		3,785,010		2,269,943
Greater than 5 years [member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		2,341,711		1,310,249
Greater than 5 years [member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,065,184		959,694
Greater than 5 years [member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	378,115
Greater than 5 years [member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,839,622		375,660
Greater than 5 years [member] | Securities issued by the Colombian Government [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		0
Greater than 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		246,981
Greater than 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		226,284		364,663
Greater than 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets				209,228
Greater than 5 years [member] | Securities issued by Foreign Governments [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		197,672
Greater than 5 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		222,122		501,594
Greater than 5 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		0
Greater than 5 years [member] | Securities issued by other financial institutions [Member] | Debt Securities [Member] | Financial assets at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		180,443
Greater than 5 years [member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		5,344		3,133
Greater than 5 years [member] | Securities issued by Government entities [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		0		0
Greater than 5 years [member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		48,339		65,199
Greater than 5 years [member] | Corporate bonds [Member] | Debt Securities [Member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		$ 818,203		$ 750,466
[1]	For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies.
[2]	Includes mortgage-backed securities (TIPS) measured at fair value through profit or loss amounting to COP 196,920 and amortized cost amounting to COP 7. For further information on TIPS’ fair value measurement see Note 29 fair value of assets and liabilities.

FINANCIAL ASSETS INVESTMENTS _5

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 2) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		$ 17,361,475	$ 16,377,253
Trading equity securities [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		1,639,948	1,517,830
Financial assets at fair value through profit or loss, category [member] | Trading equity securities [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets	[1]	1,101,461	988,455
Financial assets at fair value through other comprehensive income, category [member] | Trading equity securities [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets		$ 538,487	$ 529,375
[1]	The growth is mainly due to the increase of the Sura Assets Management fair value by COP 69,162 at the end of the year 2018. In accordance with the price conditions agreed with Caisse de Dépôt et Placement du Québec (CDPQ) for the sale of this investment, the total Bank’s shareholding will be sold for (USD 135,173) COP 439,279.

FINANCIAL ASSETS INVESTMENTS _6

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 3) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Securities at fair value through OCI:
Total equity securities at fair value through OCI		$ 0	$ 529,375
Trading equity securities [member] | TELERED [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		100,126	82,384
Trading equity securities [member] | Asociacin Gremial de Instituciones Financieras Credibanco SA [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		84,807	85,342
Trading equity securities [member] | CIFI [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		23,663	29,922
Trading equity securities [member] | Compaa De Procesamiento de Medios de Pago GuatemalaBahamas S A [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		17,408	11,009
Trading equity securities [member] | Transacciones y Transferencias S A [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		6,424	5,059
Trading equity securities [member] | CADENALCO [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		2,964	5,782
Trading equity securities [member] | Deceval [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI	[1]	0	22,024
Trading equity securities [member] | Others [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		226,150	205,909
Trading equity securities [member] | Listed In Colombia [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		71,626	76,178
Trading equity securities [member] | Listed outside Colombia [Member]
Securities at fair value through OCI:
Total equity securities at fair value through OCI		$ 5,319	$ 5,766
[1]	Between 2018 and 2017 Deceval was totally sold for COP 21,444 due to the merger between Bolsa de Valores de Colombia (BVC) and Deceval. This transaction transferred from OCI to retained earnings the amount of COP 20,644.

FINANCIAL ASSETS INVESTMENTS _7

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 4) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	$ 2,827,817	$ 2,741,344
Investments pledged as collateral in repo operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral		2,622,409
Investments pledged as collateral in derivative operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	180,001	118,935
Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	2,647,816
Stocks [Member] | Less than 3 months | Investments pledged as collateral in derivative operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	91
Stocks [Member] | Less than 3 months | Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	2,855
Bonds [Member] | Greater 12 months | Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	285,463
TES Treasury Instruments [Member] | Greater 12 months | Investments pledged as collateral in repo operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral		1,744,736
TES Treasury Instruments [Member] | Greater 12 months | Investments pledged as collateral in derivative operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	10,182	78,688
TES Treasury Instruments [Member] | Greater 12 months | Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	1,131,623
TES Treasury Instruments [Member] | Between 3 and 6 months | Investments pledged as collateral in derivative operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	1,353
TES Treasury Instruments [Member] | Between 3 and 6 months | Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	67,658
TES Treasury Instruments [Member] | Between 6 and 12 months | Investments pledged as collateral in repo operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral		877,673
TES Treasury Instruments [Member] | Between 6 and 12 months | Investments pledged as collateral in derivative operations [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	168,375	$ 40,247
TES Treasury Instruments [Member] | Between 6 and 12 months | Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	713,974
TES Treasury Instruments [Member] | Less than 3 months | Investments Pledged As Collateral In Money Market [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	264,292
CDT | Later Than Twelve Months [Member] | Investments Pledged As Collateral In Money Market [Member] | Other Financial Instituition [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Total securities pledged as collateral	$ 181,951

FINANCIAL ASSETS INVESTMENTS _8

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 5) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	$ 16,377,253
Transfers:
Ending Balance	17,361,475
Debt Securities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	14,859,423
Transfers:
Ending Balance	15,721,527
Debt Securities [Member] | Financial Assets Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	6,113,332	[1]
Transfers:
Transfer from Stage 2 to Stage 1	0
Change in measurement	130,671	[2]
Financial assets derecognized during the period other than write-offs	(3,404,093)
New financial assets purchased	3,859,599
Valuation on investments and Write-offs	(129,123)
Foreign exchange	241,280
Ending Balance	6,811,666
Debt Securities [Member] | Financial Assets Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Member] | Stage One [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	5,673,059	[1]
Transfers:
Transfer from Stage 2 to Stage 1	153,447
Change in measurement	130,671	[2]
Financial assets derecognized during the period other than write-offs	(3,124,605)
New financial assets purchased	3,859,206
Valuation on investments and Write-offs	(133,232)
Foreign exchange	226,961
Ending Balance	6,785,507
Debt Securities [Member] | Financial Assets Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Member] | Stage Two [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	440,273	[1]
Transfers:
Transfer from Stage 2 to Stage 1	(153,447)
Change in measurement	0	[2]
Financial assets derecognized during the period other than write-offs	(279,488)
New financial assets purchased	393
Valuation on investments and Write-offs	4,109
Foreign exchange	14,319
Ending Balance	$ 26,159
[1]	For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards.
[2]	Change in measurement to transfer a small proportion of Grupo Agromercantil Holding debt instruments portfolio from fair value to amortized cost.

FINANCIAL ASSETS INVESTMENTS _9

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 6) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	$ 1,843,708	$ 1,134,372
Derivative financial liabilities	(1,295,070)	(945,853)
Total, net	548,638	188,519
Forward contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	295,326	172,682
Derivative financial liabilities	(306,600)	(147,446)
Total, net	(11,274)	25,236
Forward contract [member] | Foreign exchange contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	294,345	172,310
Derivative financial liabilities	(299,015)	(142,976)
Forward contract [member] | Equity contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	981	372
Derivative financial liabilities	(7,585)	(4,470)
Swap contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	1,452,164	946,695
Derivative financial liabilities	(958,881)	(781,464)
Total, net	493,283	165,231
Swap contract [member] | Foreign exchange contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	1,199,236	672,558
Derivative financial liabilities	(700,903)	(505,823)
Swap contract [member] | Interest rate contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	252,928	274,137
Derivative financial liabilities	(257,978)	(275,641)
Option contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	96,218	14,995
Derivative financial liabilities	(29,589)	(16,943)
Total, net	66,629	(1,948)
Option contract [member] | Foreign exchange contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	96,218	14,995
Derivative financial liabilities	$ (29,589)	$ (16,943)

FINANCIAL ASSETS INVESTMENTS_10

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 7) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	$ 17,361,475	$ 16,377,253
Loss allowance	(10,235,831)	(8,223,103)	$ (8,223,103)	$ (5,248,755)
Stage One [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Loss allowance	(1,759,775)	(1,601,051)
Stage Two [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Loss allowance	(1,215,323)	$ (1,042,597)
12-month expected credit losses [member]
Disclosure of financial assets investments and derivatives [Line Items]
Securities at amortized cost	3,481,928
Securities at fair value through other comprehensive income	3,329,738
12-month expected credit losses [member] | Stage One [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Securities at amortized cost	3,456,164
Securities at fair value through other comprehensive income	3,329,345
12-month expected credit losses [member] | Stage Two [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Securities at amortized cost	25,764
Securities at fair value through other comprehensive income	393
12-month expected credit losses [member] | Financial assets at amortised cost, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	3,493,658
Loss allowance	(11,730)
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Stage One [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	3,467,285
Loss allowance	(11,121)
12-month expected credit losses [member] | Financial assets at amortised cost, category [member] | Stage Two [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	26,373
Loss allowance	(609)
12-month expected credit losses [member] | Financial assets measured at fair value through other comprehensive income, category [member]
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	3,332,791
Loss allowance	(3,053)
12-month expected credit losses [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Stage One [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	3,332,398
Loss allowance	(3,053)
12-month expected credit losses [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Stage Two [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount	393
Loss allowance	$ 0

FINANCIAL ASSETS INVESTMENTS_11

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 8) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	$ 1,843,708	$ 1,134,372
Derivative financial liabilities	(1,295,070)	(945,853)
Derivative financial Assets liabilities	548,638	188,519
Asset Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	46,527,428	39,778,272
Liability Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(38,796,360)	(32,768,799)
Forward contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	295,326	172,682
Derivative financial liabilities	(306,600)	(147,446)
Derivative financial Assets liabilities	(11,274)	25,236
Forward contract [member] | Foreign exchange contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	10,968,445	11,618,005
Forward contract [member] | Equity contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	495,124	1,010,557
Forward contract [member] | Asset Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	11,463,569	12,628,562
Forward contract [member] | Liability Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(13,761,257)	(12,072,987)
Forward contract [member] | Foreign exchange contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(11,482,549)	(10,276,967)
Forward contract [member] | Equity contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(2,278,708)	(1,796,020)
Swap contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,452,164	946,695
Derivative financial liabilities	(958,881)	(781,464)
Derivative financial Assets liabilities	493,283	165,231
Swap contract [member] | Foreign exchange contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	10,504,017	6,188,880
Swap contract [member] | Asset Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	31,785,883	22,504,581
Swap contract [member] | Liability Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(21,959,193)	(20,013,615)
Swap contract [member] | Interest Rate contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	21,281,866	16,315,701
Swap contract [member] | Foreign exchange contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(4,962,024)	(4,163,466)
Swap contract [member] | Interest Rate contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(16,997,169)	(15,850,149)
Option contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	96,218	14,995
Derivative financial liabilities	(29,589)	(16,943)
Derivative financial Assets liabilities	66,629	(1,948)
Option contract [member] | Foreign exchange contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,797,496	697,346
Option contract [member] | Asset Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,797,496	697,346
Option contract [member] | Liability Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(1,638,795)	(682,197)
Option contract [member] | Foreign exchange contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(1,638,795)	(682,197)
Futures contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,843,708	1,134,372
Derivative financial liabilities	(1,295,070)	(945,853)
Derivative financial Assets liabilities	43,365	3,947,783
Futures contract [member] | Foreign exchange contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,426,478	3,772,283
Futures contract [member] | Equity contracts Assets [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	54,002	175,500
Futures contract [member] | Asset Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,480,480	3,947,783
Futures contract [member] | Liability Contracts [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(1,437,115)	0
Futures contract [member] | Foreign exchange contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	(1,434,115)	0
Futures contract [member] | Equity contracts Liabilities [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial liabilities	$ (3,000)	$ 0

FINANCIAL ASSETS INVESTMENTS_12

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 9) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	$ 8,223,103		$ 8,223,103		$ 5,248,755
Net effect in loss allowance changes	2,201,482				27,825
New debt instruments purchased	8,874,360	[1]	6,585,597	[2]	5,149,131	[3]
Debt instruments that have been derecognized	(4,562,875)	[1]	(2,706,038)	[2]	(2,218,892)	[3]
Translation adjustment	199,079
Ending balance	10,235,831		8,223,103		$ 8,223,103
Debt Securities [Member] | Financial Assets Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	15,729
Net effect in loss allowance changes	2,577
Transfer to 12-Month ECL	3,455
Transfer to lifetime ECL not credit-impaired	(878)
New debt instruments purchased	6,508
Debt instruments that have been derecognized	(10,786)
Translation adjustment	755
Ending balance	14,783		15,729
Stage One [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	1,601,051
Net effect in loss allowance changes	770,102
Translation adjustment	35,783
Ending balance	1,759,775		1,601,051
Stage One [Member] | Debt Securities [Member] | Financial Assets Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	8,932
Net effect in loss allowance changes	5,044
Transfer to 12-Month ECL	3,955
Transfer to lifetime ECL not credit-impaired	1,089
New debt instruments purchased	6,508
Debt instruments that have been derecognized	(7,072)
Translation adjustment	762
Ending balance	14,174		8,932
Stage Two [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	1,042,597
Net effect in loss allowance changes	343,594
Translation adjustment	28,636
Ending balance	1,215,323		1,042,597
Stage Two [Member] | Debt Securities [Member] | Financial Assets Measured At Amortized Cost And Fair Value Through Other Comprehensive Income [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Beginning balance	6,797
Net effect in loss allowance changes	(2,467)
Transfer to 12-Month ECL	(500)
Transfer to lifetime ECL not credit-impaired	(1,967)
New debt instruments purchased	0
Debt instruments that have been derecognized	(3,714)
Translation adjustment	(7)
Ending balance	$ 609		$ 6,797
[1]	The provision for loan losses, net COP 4,311,485 differs from the COP 3,851,625 presented in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 459,860 due to the recovery of charged-off loans.
[2]	The provision for loan losses, net COP 3,879,559 differs from the COP 3,468,699 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 410,860 due to the recovery of charged-off loans.
[3]	The provision for loan losses, net COP 2,930,239 differs from the COP 2,643,710 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 286,529 due to the recovery of charged-off loans.

FINANCIAL ASSETS INVESTMENTS_13

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 10) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	$ 1,843,708	$ 1,134,372
Derivative financial liabilities	(1,295,070)	(945,853)
Derivative financial Assets liabilities	548,638	188,519
Forward contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	295,326	172,682
Derivative financial liabilities	(306,600)	(147,446)
Derivative financial Assets liabilities	(11,274)	25,236
Forward contract [member] | Up to 1 year [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	277,578	170,299
Derivative financial liabilities	(292,585)	(141,326)
Forward contract [member] | From 1 to 3 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	17,741	2,383
Derivative financial liabilities	(14,015)	(6,120)
Forward contract [member] | Over 3 years [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	7	0
Derivative financial liabilities	0	0
Swap contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	1,452,164	946,695
Derivative financial liabilities	(958,881)	(781,464)
Derivative financial Assets liabilities	493,283	165,231
Swap contract [member] | Up to 1 year [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	645,735	240,690
Derivative financial liabilities	(270,900)	(135,749)
Swap contract [member] | From 1 to 3 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	345,321	339,934
Derivative financial liabilities	(262,848)	(321,708)
Swap contract [member] | Over 3 years [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	461,108	366,071
Derivative financial liabilities	(425,133)	(324,007)
Option contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	96,218	14,995
Derivative financial liabilities	(29,589)	(16,943)
Derivative financial Assets liabilities	66,629	(1,948)
Option contract [member] | Up to 1 year [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	69,292	14,229
Derivative financial liabilities	(17,305)	(15,836)
Option contract [member] | From 1 to 3 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	26,926	766
Derivative financial liabilities	(12,284)	(1,107)
Option contract [member] | Over 3 years [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	0	0
Derivative financial liabilities	0	0
Futures contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	1,843,708	1,134,372
Derivative financial liabilities	(1,295,070)	(945,853)
Derivative financial Assets liabilities	43,365	3,947,783
Futures contract [member] | Up to 1 year [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	992,605	425,218
Derivative financial liabilities	(580,790)	(292,911)
Futures contract [member] | From 1 to 3 years [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	389,988	343,083
Derivative financial liabilities	(289,147)	(328,935)
Futures contract [member] | Over 3 years [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivative financial assets	461,115	366,071
Derivative financial liabilities	$ (425,133)	$ (324,007)

FINANCIAL ASSETS INVESTMENTS_14

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 11) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivative [Line Items]
Collateral	$ 213,677	$ 154,599
Derivatives Contracts [Member]
Disclosure of financial assets investments and derivative [Line Items]
Collateral	$ (471,340)	$ (264,700)

FINANCIAL ASSETS INVESTMENTS_15

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 12) - Fixed interest rate [member] $ in Thousands, $ in Millions	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)
Disclosure of financial assets investments and derivatives [Line Items]
Carrying amount of hedged item Assets	$ 285,463	$ 87,841	$ 341,229	$ 114,353
Accumulated amount of fair value adjustments on the hedged item Assets	$ 1,829	$ 563
Accumulated amount of fair value adjustments on the hedged item Liabilities			$ (1,769)	$ (593)

FINANCIAL ASSETS INVESTMENTS_16

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 13) - Derivative Hedged Item [Member] $ in Thousands, $ in Millions	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)
Disclosure of financial assets investments and derivatives [Line Items]
Notional amount	$ 258,518	$ 79,550	$ 304,159	$ 101,930
Fair value	$ 285,463	$ 87,841	$ 341,229	$ 114,353

FINANCIAL ASSETS INVESTMENTS_17

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 14) - COP ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fixed interest rate [member]
Disclosure of financial assets investments and derivatives [Line Items]
Gain (loss) on hedge ineffectiveness recognised in other comprehensive income	$ 14,158	$ (3,678)	$ 14,634

FINANCIAL ASSETS INVESTMENTS_18

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 15) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	$ 1,843,708	$ 1,134,372
Deririvatives Liabilities	(1,295,070)	(945,853)
Net derivatives in statement of financial position, Derivatives Assets	1,843,708	1,134,372
Net derivatives in statement of financial position, Deririvatives Liabilities	(1,295,070)	(945,853)
Master netting agreements, Derivatives Assets	(1,179,503)	(894,863)
Master netting agreements, Deririvatives Liabilities	1,295,070	945,853
Cash collateral received/paid, Derivatives Assets	(213,677)	(154,599)
Cash collateral received/paid, Deririvatives Liabilities	0	0
Total derivatives assetss/ liabilities, Deririvatives Liabilities	192,865	0
Total derivatives assetss/ liabilities, Deririvatives Liabilities	0	0
Foreign exchange contracts [Member] | Swap contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	1,199,236	672,558
Deririvatives Liabilities	(700,903)	(505,823)
Foreign exchange contracts [Member] | Forward contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	294,345	172,310
Deririvatives Liabilities	(299,015)	(142,976)
Foreign exchange contracts [Member] | Option contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	96,218	14,995
Deririvatives Liabilities	(29,589)	(16,943)
Interest rate contracts [Member] | Swap contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	252,928	274,137
Deririvatives Liabilities	(257,978)	(275,641)
Equity contracts [Member] | Forward contract [member]
Disclosure of financial assets investments and derivatives [Line Items]
Derivatives Assets	981	372
Deririvatives Liabilities	$ (7,585)	$ (4,470)

FINANCIAL ASSETS INVESTMENTS_19

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details 16) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Financial assets		$ 17,361,475	$ 16,377,253
Debt Securities [Member]
Financial assets		15,721,527	$ 14,859,423
Debt Securities [Member] | Measurement Under IFRS 9 2013 [Member]
Financial assets at fair value through profit or loss		10,701,855
Financial assets at amortised cost		4,157,568
Financial assets at fair value through other comprehensive income		0
Financial assets		14,859,423
Debt Securities [Member] | Measurement Under IFRS 9 2014 [Member]
Financial assets at fair value through profit or loss	[1]	8,777,923
Financial assets at amortised cost	[1]	3,121,981
Financial assets at fair value through other comprehensive income	[1]	2,991,352
Financial assets	[1]	14,891,256
Debt Securities [Member] | Difference [Member]
Financial assets at fair value through profit or loss		(1,923,932)
Financial assets at amortised cost		(1,035,587)
Financial assets at fair value through other comprehensive income		2,991,352
Financial assets		$ 31,833
[1]	For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards.

FINANCIAL ASSETS INVESTMENTS_20

FINANCIAL ASSETS INVESTMENTS AND DERIVATIVES (Details Textual) $ in Thousands, $ in Millions		12 Months Ended
		Dec. 31, 2018COP ($)	Dec. 31, 2017COP ($)	Dec. 31, 2016COP ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018COP ($)	Jun. 30, 2018USD ($)	Dec. 31, 2017USD ($)
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets available-for-sale		$ 654,207	$ 580,438
Other comprehensive income, net of tax, financial assets measured at fair value through other comprehensive income		33,838	38,884	$ 232,617
Gains (losses) on cash flow hedges, net of tax	[1]	0	0	(12,112)
Gains (losses) on hedges of net investments in foreign operations, net of tax		(584,650)	36,762	327,272
Gain on Disposal of Business		21,444	0
Retained earnings		3,906,945	3,568,182
Current held-to-maturity investments						$ 72,729	$ 22,380
Financial Assets Investments And Derivative Financial Instruments		19,205,183	17,511,625		$ 2,200,000			$ 2,200,000
CDPQ [Member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets available-for-sale		439,279			$ 135,173
Increase In Financial Assets At Fair Value Through Profit Or Loss		69,162
Trading equity securities [member]
Disclosure of financial assets investments and derivatives [Line Items]
Dividends received from investments accounted for using equity method, classified as investing activities		13,105	$ 11,951	$ 9,317
Financial assets investments [member] | Mortgage Backed Security [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets at fair value through profit or loss		196,920
Financial assets at amortised cost		7
Financial assets at fair value through profit or loss, category [member] | Capital Investments SAFI S.A. [member]
Disclosure of financial assets investments and derivatives [Line Items]
Financial assets available-for-sale		$ 1,345
[1]	In 2016 the Bank's subsidiary, Banistmo, discontinued cash flow hedge accounting. For further information see Note 5.2. Derivatives Financial Instruments.

LOANS AND ADVANCES TO CUSTOME_3

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total gross loans and Financial Leases		$ 173,819,116	$ 160,468,094
Total allowance	[1]	(10,235,831)	(8,223,103)
Total Net Loans and financial leases		163,583,285	152,244,991
Commercial [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total gross loans and Financial Leases	[2]	94,600,648	88,997,241
Consumer loans [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total gross loans and Financial Leases		31,993,381	27,646,114
Mortage [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total gross loans and Financial Leases		22,870,685	20,512,208
Financial leases [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total gross loans and Financial Leases		23,198,204	22,248,951
Small Business Loans [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total gross loans and Financial Leases		$ 1,156,198	$ 1,063,580
[1]	The allowance as of December 31, 2018 was estimated according to the expected credit losses methodology required by IFRS 9, on the other hand, the estimations for the year ended as of December 31, 2017 were computed under IAS 39, therefore both amounts are not comparable. For further information see Note 32 Impacts on application of new standards.
[2]	Includes loans to financial institutions amounting to COP 8,154,507 and COP 7,862,401 as of December 31, 2018 and 2017, respectively.

LOANS AND ADVANCES TO CUSTOME_4

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details 1) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance		$ 8,223,103		$ 8,223,103		$ 5,248,755
Net effect in loss allowance changes		2,201,482				27,825
Provisions for loan losses		8,874,360	[1]	6,585,597	[2]	5,149,131	[3]
Charges-off		(3,815,912)		(2,275,300)		(1,533,202)
Recoveries		(4,562,875)	[1]	(2,706,038)	[2]	(2,218,892)	[3]
Translation adjustment		199,079		(3,067)		(51,706)
Ending balance		10,235,831		8,223,103		8,223,103
Effect of adoption of IFRS 9		1,035,061
Loan purchases / Loan sales	[4]	(2,397)
Adjusted stage 3	[5]	285,412
Compania de financiamiento Tuya S.A [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance				440,897		351,375
Provisions for loan losses	[6]					465,947
Charges-off						(228,757)
Recoveries	[6]					(147,668)
Ending balance						440,897
Commercial [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance		4,514,180		3,499,791		2,694,965
Net effect in loss allowance changes						0
Provisions for loan losses		5,003,417	[1]	3,594,310	[2]	2,684,559	[3]
Charges-off		(1,468,704)		(792,145)		(489,573)
Recoveries		(3,415,455)	[1]	(1,783,649)	[2]	(1,379,288)	[3]
Translation adjustment		58,060		(4,127)		(10,872)
Ending balance		5,360,833		4,514,180		3,499,791
Effect of adoption of IFRS 9		512,959
Loan purchases / Loan sales	[4]	(2,020)
Adjusted stage 3	[5]	158,396
Consumer loans [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance		2,291,829		1,791,123		1,321,281
Net effect in loss allowance changes						0
Provisions for loan losses		3,081,883	[1]	2,310,518	[2]	1,922,315	[3]
Charges-off		(2,012,315)		(1,302,630)		(902,400)
Recoveries		(886,928)	[1]	(510,684)	[2]	(525,510)	[3]
Translation adjustment		109,750		3,502		(24,563)
Ending balance		2,892,891		2,291,829		1,791,123
Effect of adoption of IFRS 9		237,515
Loan purchases / Loan sales	[4]	0
Adjusted stage 3	[5]	71,157
Mortage [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance		751,793		653,936		572,772
Net effect in loss allowance changes						0
Provisions for loan losses		337,092	[1]	284,392	[2]	225,291	[3]
Charges-off		(112,417)		(37,677)		(24,619)
Recoveries		(163,846)	[1]	(253,578)	[2]	(109,912)	[3]
Translation adjustment		14,640		(1,972)		(9,596)
Ending balance		853,764		751,793		653,936
Effect of adoption of IFRS 9		106,692
Loan purchases / Loan sales	[4]	0
Adjusted stage 3	[5]	26,502
Financial leases [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance		807,923		567,046		579,151
Net effect in loss allowance changes						27,825
Provisions for loan losses		341,651	[1]	276,687	[2]	221,694	[3]
Charges-off		(135,674)		(77,762)		(74,900)
Recoveries		(58,175)	[1]	(133,986)	[2]	(180,537)	[3]
Translation adjustment		13,392		(583)		(6,187)
Ending balance		990,970		807,923		567,046
Effect of adoption of IFRS 9		176,521
Loan purchases / Loan sales	[4]	(377)
Adjusted stage 3	[5]	22,230
Small Business Loans [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance		141,965		110,015		80,586
Net effect in loss allowance changes						0
Provisions for loan losses		110,317	[1]	119,690	[2]	95,272	[3]
Charges-off		(86,802)		(65,086)		(41,710)
Recoveries		(38,471)	[1]	(24,141)	[2]	(23,645)	[3]
Translation adjustment		3,237		113		(488)
Ending balance		137,373		$ 141,965		$ 110,015
Effect of adoption of IFRS 9		1,374
Loan purchases / Loan sales	[4]	0
Adjusted stage 3	[5]	$ 7,127
[1]	The provision for loan losses, net COP 4,311,485 differs from the COP 3,851,625 presented in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 459,860 due to the recovery of charged-off loans.
[2]	The provision for loan losses, net COP 3,879,559 differs from the COP 3,468,699 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 410,860 due to the recovery of charged-off loans.
[3]	The provision for loan losses, net COP 2,930,239 differs from the COP 2,643,710 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 286,529 due to the recovery of charged-off loans.
[4]	This ítem includes portfolio purchase/sales operation held between Bancolombia S.A. and Titularizadora Colombiana.
[5]	Provisions reflect the expected credit losses (ECL) measured using the three-step approach under IFRS 9, as described in Note 2.D Significant accounting policies.
[6]	The provision for loan losses net of COP 318,279 differs from the COP 323,290 presented in “Credit impairment charges on loans and advances and financial leases, net" in note 30. Discontinued operations, in the amount of COP 5,011 due to provision on off balance sheet credit exposures that was accounted for as a liability under IAS 37.

LOANS AND ADVANCES TO CUSTOME_5

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details 2) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Gross investment in finance lease		$ 31,668,422	$ 30,815,282
Minimum lease payments of other arrangements that do not include payments for non-lease elements		23,198,204	22,248,951
Unearned finance income on finance lease	[1]	(8,470,218)	(8,566,331)
Minimum finance lease payments receivable, at present value		23,198,204	22,248,951
Minimum lease payments receivable under non-cancellable operating lease		(985,844)	(447,361)
Net investment in finance lease		22,212,360	21,801,590
Present value of paymnent recievables		23,198,204	22,248,951
Minimum noncollectable payments impairmentat present value		(985,844)	(447,361)
Minimum finance lease payments payable, at present value		0	0
Total present value of minimum payments		22,212,360	21,801,590
Within 1 year [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Gross investment in finance lease		735,187	759,852
Minimum lease payments of other arrangements that do not include payments for non-lease elements		526,581	526,604
Over 1 year, but less than 5 years [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Gross investment in finance lease		8,194,658	7,842,992
Minimum lease payments of other arrangements that do not include payments for non-lease elements		6,677,063	6,188,894
Over 5 years [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Gross investment in finance lease		22,738,577	22,212,438
Minimum lease payments of other arrangements that do not include payments for non-lease elements		$ 15,994,560	$ 15,533,453
[1]	Future financial income: Total Gross Investment - Total Present Value of minimum payments

LOANS AND ADVANCES TO CUSTOME_6

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details 3) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Unsecured residual values	$ 59,398	$ 56,451
Automobile [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Unsecured residual values	22,680	26,841
Technology [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Unsecured residual values	25,229	20,921
Machinery [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Unsecured residual values	11,300	8,627
Furniture and fixtures [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Unsecured residual values	$ 189	$ 62

LOANS AND ADVANCES TO CUSTOME_7

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details 4) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Minimum Payments Under Operating Leases	$ 1,290,348	$ 1,226,026
Within 1 year [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Minimum Payments Under Operating Leases	216,039	110,993
Over 1 year, but less than 5 years [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Minimum Payments Under Operating Leases	934,816	960,037
Over 5 years [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Minimum Payments Under Operating Leases	$ 139,493	$ 154,996

LOANS AND ADVANCES TO CUSTOME_8

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details 5) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total loans to Financial institutions	$ 8,154,507	$ 7,862,401
Allowance	(16,438)
Total Net Loans with financial institutions	8,138,069
Stage One [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total loans to Financial institutions	8,140,354
Allowance	(15,048)
Total Net Loans with financial institutions	8,125,306
Stage Two [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total loans to Financial institutions	13,812
Allowance	(1,123)
Total Net Loans with financial institutions	12,689
Stage Three [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Total loans to Financial institutions	341
Allowance	(267)
Total Net Loans with financial institutions	$ 74

LOANS AND ADVANCES TO CUSTOME_9

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details 6) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2016COP ($)
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance	$ 8,223,103		$ 8,223,103	$ 5,248,755
Transfer to Stage 1	(393,753)
Transfer to Stage 2		$ 245,099
Transfer to Stage 3		3,870,876
Net remeasurement of loss allowance	3,722,222
New financial assets purchased/originated	2,201,482			27,825
Financial assets that have been derecognized	(199,079)		3,067	51,706
Charges-off	(3,815,912)		(2,275,300)	(1,533,202)
Foreign Exchange and other movements	199,079
Ending balance	10,235,831		8,223,103	$ 8,223,103
Simplified Methodology [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance	25,169
Transfer to Stage 1	8,598
Transfer to Stage 2		588
Transfer to Stage 3		(4,099)
Net remeasurement of loss allowance	5,087
New financial assets purchased/originated	(148)
Financial assets that have been derecognized	(39)
Charges-off	(11,970)
Foreign Exchange and other movements	(1,868)
Ending balance	16,231		25,169
Stage One [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance	1,601,051
Transfer to Stage 1	(40,083)
Transfer to Stage 2		(88,750)
Transfer to Stage 3		(103,002)
Net remeasurement of loss allowance	(231,835)
New financial assets purchased/originated	770,102
Financial assets that have been derecognized	(367,718)
Charges-off	(47,608)
Foreign Exchange and other movements	35,783
Ending balance	1,759,775		1,601,051
Stage Two [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance	1,042,597
Transfer to Stage 1	(252,397)
Transfer to Stage 2		532,660
Transfer to Stage 3		(190,762)
Net remeasurement of loss allowance	89,501
New financial assets purchased/originated	343,594
Financial assets that have been derecognized	(150,433)
Charges-off	(138,572)
Foreign Exchange and other movements	28,636
Ending balance	1,215,323		1,042,597
Stage Three [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Beginning balance	6,589,347
Transfer to Stage 1	(109,871)
Transfer to Stage 2		(199,399)
Transfer to Stage 3		$ 4,168,739
Net remeasurement of loss allowance	3,859,469
New financial assets purchased/originated	1,087,934
Financial assets that have been derecognized	(811,014)
Charges-off	(3,617,762)
Foreign Exchange and other movements	136,528
Ending balance	$ 7,244,502		$ 6,589,347

LOANS AND ADVANCES TO CUSTOM_10

LOANS AND ADVANCES TO CUSTOMERS AND FINANCIAL INSTITUTIONS, NET (Details Textual) - COP ($) $ in Millions		10 Months Ended	12 Months Ended
		Oct. 31, 2016	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Reversal, allowance account for credit losses of financial assets			$ 4,562,875	[1]	$ 2,706,038	[2]	$ 2,218,892	[3]
Loans and advances to banks			8,154,507		7,862,401
Allowance account for credit losses of financial assets			10,235,831		8,223,103		8,223,103		$ 5,248,755
Impairment loss recognised in profit or loss			(168,756)		173,339		0
Increase (decrease) in allowance account for credit losses of financial assets			2,444		0		0
Utilisation, allowance account for credit losses of financial assets			3,815,912		2,275,300		1,533,202
Compania de financiamiento Tuya S.A [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Reversal, allowance account for credit losses of financial assets	[4]						147,668
Allowance account for credit losses of financial assets							440,897		$ 351,375
Utilisation, allowance account for credit losses of financial assets							228,757
Loans and receivables, category [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Reversal, allowance account for credit losses of financial assets			459,860		410,860		286,529
Impairment loss recognised in profit or loss			3,851,625		3,468,699		$ 2,643,710
Loans and receivables, category [member] | Compania de financiamiento Tuya S.A [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Reversal, allowance account for credit losses of financial assets		$ 5,011
Allowance account for credit losses of financial assets		318,279
Impairment loss recognised in profit or loss		$ 323,290
Stage One [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Loans and advances to banks			8,140,354
Allowance account for credit losses of financial assets			1,759,775		1,601,051
Utilisation, allowance account for credit losses of financial assets			47,608
Stage One [Member] | 12-month expected credit losses [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Increase (decrease) in exposure to credit risk on loan commitments and financial guarantee contracts			14,599,662
Increase (decrease) in allowance account for credit losses of financial assets			158,724
Increase through origination or purchase, exposure to credit risk on loan commitments and financial guarantee contracts			72,427,570
Decrease through derecognition, financial assets			47,008,259
Stage Two [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Loans and advances to banks			13,812
Allowance account for credit losses of financial assets			1,215,323		1,042,597
Utilisation, allowance account for credit losses of financial assets			138,572
Stage Two [Member] | Lifetime expected credit losses [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Increase (decrease) in exposure to credit risk on loan commitments and financial guarantee contracts			1,065,389
Increase (decrease) in allowance account for credit losses of financial assets			172,726
Increase through origination or purchase, exposure to credit risk on loan commitments and financial guarantee contracts			1,943,921
Decrease through derecognition, financial assets			1,779,790
Stage Three [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Loans and advances to banks			341
Allowance account for credit losses of financial assets			7,244,502		$ 6,589,347
Utilisation, allowance account for credit losses of financial assets			3,617,762
Stage Three [Member] | Lifetime expected credit losses [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Increase (decrease) in exposure to credit risk on loan commitments and financial guarantee contracts			537,559
Increase (decrease) in allowance account for credit losses of financial assets			655,155
Decrease through derecognition, financial assets			5,183,154
Increase through origination or purchase, financial assets			2,007,062
Stage Three [Member] | Lifetime expected credit losses [member] | Infra Structure Advances [Member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Decrease through write-off, financial assets			302,325
Credit impairment charges [member]
Disclosure Of Loans And Advances To Customers Explanatory [Line Items]
Allowance account for credit losses of financial assets			$ 4,311,485
[1]	The provision for loan losses, net COP 4,311,485 differs from the COP 3,851,625 presented in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 459,860 due to the recovery of charged-off loans.
[2]	The provision for loan losses, net COP 3,879,559 differs from the COP 3,468,699 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 410,860 due to the recovery of charged-off loans.
[3]	The provision for loan losses, net COP 2,930,239 differs from the COP 2,643,710 presents in the line “Credit impairment charges on loans and advances and financial leases, net” of the Consolidated Statement of Income, in the amount of COP 286,529 due to the recovery of charged-off loans.
[4]	The provision for loan losses net of COP 318,279 differs from the COP 323,290 presented in “Credit impairment charges on loans and advances and financial leases, net" in note 30. Discontinued operations, in the amount of COP 5,011 due to provision on off balance sheet credit exposures that was accounted for as a liability under IAS 37.

INVESTMENTS IN ASSOCIATES AND_3

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Details) - COP ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Disclosure Of Interests In Other Entities Explanatory [Abstract]
Investments in associates	[1]	$ 1,710,969		$ 1,327,610
Investments in Joint ventures		438,610		237,449
Total		$ 2,149,579	[2]	$ 1,565,059	[3]
[1]	As of December 31, 2018 and 2017, the amount includes investments in associates at fair value for COP 1,119,973 and COP 757,886, respectively and investments in associates accounted for by the equity method for COP 590,996 and COP 569,724 respectively. See note 29 Fair value of assets and liabilities.
[2]	As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[3]	As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.

INVESTMENTS IN ASSOCIATES AND_4

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Details 1) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Accumulated other comprehensive income		$ 3,202,969		$ 2,546,259
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		1,918		(11,547)		$ (1,718)
Other comprehensive income, net of tax, exchange differences on translation		1,043,593		412,878		(672,684)
Investments in associates	[1]	1,710,969		1,327,610
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		161,923	[2]	239,333	[3]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss		$ 174,734		$ 831		$ (13,375)
Proteccion S.A. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Administration of pension funds and severances		Administration of pension funds and severances
Principal place of business of associate		Colombia		Colombia
Proportion of ownership interest in associate		20.58%		20.58%
Accumulated other comprehensive income		$ 15,423	[4]	$ 12,465	[5]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		2,958	[6]	1,236	[7]
Other comprehensive income, net of tax, exchange differences on translation		0	[8]	0	[9]
Investments in associates		478,482		471,312
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		42,057	[2]	$ 72,576	[3]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10]	$ (819)
PA Viva Malls [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Development and operation of commercial spaces	[11]	Development and operation of commercial spaces
Principal place of business of associate		Colombia	[11]	Colombia
Proportion of ownership interest in associate		49.00%	[11]	49.00%
Accumulated other comprehensive income		$ 0	[4],[11]	$ 0	[5]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[11]	0	[7]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[11]	0	[9]
Investments in associates		1,119,973	[11]	757,886
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		96,201	[2],[11]	$ 144,146	[3]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[11]	$ 0
Titularizadora Colombiana S.A. Hitos [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Mortgage portfolio securities	[12]	Mortgage portfolio securities	[13]
Principal place of business of associate		Colombia	[12]	Colombia	[13]
Proportion of ownership interest in associate		26.98%	[12]	26.98%	[13]
Accumulated other comprehensive income		$ (1,483)	[4],[12]	$ (1,389)	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		(94)	[6],[12]	(768)	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[12]	0	[9],[13]
Investments in associates		37,391	[12]	35,346	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		4,962	[2],[12]	$ 3,305	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ 40
Redeban Multicolor S.A. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Network data transmission services	[12]	Network data transmission services	[13]
Principal place of business of associate		Colombia	[12]	Colombia	[13]
Proportion of ownership interest in associate		20.36%	[12]	20.36%	[13]
Accumulated other comprehensive income		$ (651)	[4],[12]	$ (651)	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[12]	0	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[12]	0	[9],[13]
Investments in associates		19,105	[12]	17,951	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		2,203	[2],[12]	$ 1,906	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ 45
Avefarma S.A.S [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Manufacture and distribution of glass packing for pharmaceutical products	[14]	Manufacture and distribution of glass packing for pharmaceutical products	[13],[15]
Principal place of business of associate		Colombia	[14]	Colombia	[13],[15]
Proportion of ownership interest in associate		21.00%	[14]	21.00%	[13],[15]
Accumulated other comprehensive income		$ (11,704)	[4],[14]	$ (11,704)	[5],[13],[15]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[14]	(10,831)	[7],[13],[15]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[14]	0	[9],[13],[15]
Investments in associates		0	[14]	0	[13],[15]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[2],[14]	$ 6,307	[3],[13],[15]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[14]	$ 0
Panamerican Pharmaceutical Holding Inc. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Advisory services, consultation, representation, agent for individuals or company	[14]	Advisory services, consultation, representation, agent for individuals or company	[13],[15]
Principal place of business of associate		Panama	[14]	Panama	[13],[15]
Proportion of ownership interest in associate		21.00%	[14]	21.00%	[13],[15]
Accumulated other comprehensive income		$ (1,486)	[4],[14]	$ (1,417)	[5],[13],[15]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		(69)	[6],[14]	196	[7],[13],[15]
Other comprehensive income, net of tax, exchange differences on translation		(785)	[8],[14]	(67)	[9],[13],[15]
Investments in associates		0	[14]	0	[13],[15]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[2],[14]	$ (1,171)	[3],[13],[15]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[14]	$ 0
Internacional Ejecutiva de Aviacion S.A.S. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Aircraft and aircraft travel		Aircraft and aircraft travel	[13]
Principal place of business of associate		Colombia		Colombia	[13]
Proportion of ownership interest in associate		33.33%		33.33%	[13]
Accumulated other comprehensive income		$ (4)	[4]	$ 209	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		(213)	[6]	0	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		0	[8]	0	[9],[13]
Investments in associates		12,503		10,707	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		2,008	[2]	$ 1,071	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10]	$ 0
Reintegra S.A.S. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Collections and recovery of portfolio	[16]	Collections and recovery of portfolio	[13]
Principal place of business of associate		Colombia	[16]	Colombia	[13]
Proportion of ownership interest in associate		46.00%	[16]	46.00%	[13]
Accumulated other comprehensive income		$ 1,742	[4],[16]	$ 1,742	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[16]	(1,754)	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[16]	0	[9],[13]
Investments in associates		8,594	[16]	7,155	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		1,939	[2],[16]	$ 1,471	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[16]	$ (26)
ACH Colombia S.A. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Electronic transfer services	[12]	Electronic transfer services	[13]
Principal place of business of associate		Colombia	[12]	Colombia	[13]
Proportion of ownership interest in associate		19.94%	[12]	19.94%	[13]
Accumulated other comprehensive income		$ (952)	[4],[12]	$ (952)	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[12]	0	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[12]	0	[9],[13]
Investments in associates		8,313	[12]	7,338	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		3,871	[2],[12]	$ 3,109	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ 79
Concesiones CCFC S.A. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Construction of public works through an awarding system	[12]	Construction of public works through an awarding system
Principal place of business of associate		Colombia	[12]	Colombia
Proportion of ownership interest in associate		25.50%	[12]	25.50%
Accumulated other comprehensive income		$ (757)	[4],[12]	$ (756)	[5]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		(1)	[6],[12]	(3)	[7]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[12]	0	[9]
Investments in associates		13,063	[12]	9,383
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		6,794	[2],[12]	$ 6,756	[3]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ 34
Servicio Salvadoreno de Proteccion, S. A. de C.V. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Custodial services and transfer of monetary types	[12]	Custodial services and transfer of monetary types	[13]
Principal place of business of associate		El Salvador	[12]	El Salvador	[13]
Proportion of ownership interest in associate		25.00%	[12]	25.00%	[13]
Accumulated other comprehensive income		$ (727)	[4],[12]	$ (727)	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[12]	238	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		(30)	[8],[12]	153	[9],[13]
Investments in associates		8,867	[12]	6,219	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		1,905	[2],[12]	$ 418	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ (16)
Servicios Financieros, S.A. de C.V. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Processing of financial transactions and electronic payment methods	[12]	Processing of financial transactions and electronic payment methods	[13]
Principal place of business of associate		El Salvador	[12]	El Salvador	[13]
Proportion of ownership interest in associate		47.86%	[12]	47.86%	[13]
Accumulated other comprehensive income		$ 9	[4],[12]	$ 9	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[12]	0	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		(7)	[8],[12]	(5)	[9],[13]
Investments in associates		3,420	[12]	3,302	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		(160)	[2],[12]	$ (226)	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ 0
Glassfarma Tech S.A.S [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Manufacturing, elaboration and commercialization of packages and pharmaceutical products	[14]	Manufacturing, elaboration and commercialization of packages and pharmaceutical products	[13],[15]
Principal place of business of associate		Colombia	[14]	Colombia	[13],[15]
Proportion of ownership interest in associate		21.00%	[14]	21.00%	[13],[15]
Accumulated other comprehensive income		$ 127	[4],[14]	$ 127	[5],[13],[15]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[14]	139	[7],[13],[15]
Other comprehensive income, net of tax, exchange differences on translation		0	[8],[14]	0	[9],[13],[15]
Investments in associates		0	[14]	0	[13],[15]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[2],[14]	$ (458)	[3],[13],[15]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[14]	$ 0
ACH de El Salvador, S. A. de C.V. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business Of Associate		Electronic transfer services	[12]	Electronic transfer services	[13]
Principal place of business of associate		El Salvador	[12]	El Salvador	[13]
Proportion of ownership interest in associate		25.00%	[12]	25.00%	[13]
Accumulated other comprehensive income		$ 6	[4],[12]	$ 6	[5],[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax		0	[6],[12]	0	[7],[13]
Other comprehensive income, net of tax, exchange differences on translation		(64)	[8],[12]	(1)	[9],[13]
Investments in associates		1,258	[12]	1,011	[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		143	[2],[12]	$ 123	[3],[13]
Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss	[10],[12]	$ 0
[1]	As of December 31, 2018 and 2017, the amount includes investments in associates at fair value for COP 1,119,973 and COP 757,886, respectively and investments in associates accounted for by the equity method for COP 590,996 and COP 569,724 respectively. See note 29 Fair value of assets and liabilities.
[2]	Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018. See note 24.5 Dividends received, and share of profits of equity method investees
[3]	Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2017. See note 24.5 Dividends received, and share of profits of equity method investees
[4]	Corresponds to the accumulated other comprehensive income as of December 31, 2018.
[5]	Corresponds to the accumulated other comprehensive income as of December 31, 2017.
[6]	Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2018.
[7]	Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2017.
[8]	Corresponds to the other comprehensive income recognized as Cumulative Translation Adjustment of Foreign Currency (CTA) for the year ended December 31, 2018.
[9]	Corresponds to the other comprehensive income recognized as Cumulative Translation Adjustment of Foreign Currency (CTA) for the year ended December 31, 2017.
[10]	Corresponds to the other comprehensive income as deferred tax for the year ended December 31, 2018.
[11]	During 2018, the Bank increases its capital contribution in P.A Viva Malls by COP 274,951
[12]	For the purposes of applying the equity method of accounting, financial statements as of November 30, 2018 have been used. However, the Bank does not consider that appropriate adjustments have to be made since no significant transactions took place between that date and December 31, 2018.
[13]	For the purposes of applying the equity method of accounting, financial statements as of November 30, 2017 have been used, except for Redeban Multicolor S.A., for which we use the financial statements ended as of October 31, 2017. However, the Bank does not consider that appropriate adjustments have to be made since no significant transactions took place between those dates and December 31, 2017.
[14]	As of December 31, 2018 the investment in Avefarma S.A.S., Glassfarma Tech S.A.S and Panamerican Pharmaceutical Holding inc are still classified as "assets held for sale". See note 12. Assets held for sale and inventories.
[15]	As of December 31, 2017 the Bank classified the investment in Avefarma S.A.S., Glassfarma Tech S.A.S and Panamerican Pharmaceutical Holding inc as "assets held for sale", due to the fact that the management has currently been implementing a plan to sell these assets. See note 12 assets held for sale and inventories.
[16]	During 2018, the Bank increases its capital contribution in Reintegra S.A.S by COP 1,152

INVESTMENTS IN ASSOCIATES AND_5

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Assets	$ 220,113,618		$ 203,908,211
Liabilities	193,458,393		179,478,661
Profits (loss)	2,786,435		2,754,173		$ 2,791,450
PA Viva Malls [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Assets	2,301,567		1,262,837	[1]
Liabilities	11,304		29,499	[1]
Income from ordinary activities	417,942		380,612	[1]
Profits (loss)	271,648		235,647	[1]
Dividends	9,064		35,278	[1]
Proteccion S.A. [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Assets	2,172,208	[2]	2,125,552	[3]
Liabilities	675,135	[2]	663,326	[3]
Income from ordinary activities	1,387,294	[2]	1,227,139	[3]
Profits (loss)	205,134	[2]	343,345	[3]
Dividends	37,861	[2]	36,825	[3]
Titularizadora Colombiana S.A. Hitos [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Assets	151,447		614,032
Liabilities	16,911		487,073
Income from ordinary activities	50,213		35,714
Profits (loss)	14,923		8,161
Dividends	$ 2,824		$ 3,121
[1]	The difference between the net assets of P.A. Viva Malls multiplied by the Bank’s percentage of ownership, which amounted to COP 604,336 for the year ended December 31, 2017 and the carrying amount of the Bank’s interest in the associate, represents an adjustment amounted to COP 153,550 related to contractual terms with respect to the recognition of benefits.
[2]	The difference between, the net assets of Protección S.A. multiplied by the Bank’s percentage of ownership, which amounted to COP 308,048 for the year ended December 31, 2018 and the carrying amount of the Bank’s interest in the associate; represents the goodwill recognized by the Bank amounting to COP 170,434.
[3]	The difference between the net assets of Protección S.A. multiplied by the Bank’s percentage of ownership, which amounted to COP 300,926 for the year ended December 31, 2017, and the carrying amount of the Bank’s interest in the associate, represents the goodwill recognized by the Bank amounting to COP 170,434

INVESTMENTS IN ASSOCIATES AND_6

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Details 3) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax		$ 25,891	[1]	$ 14,269	[2]
Accumulated other comprehensive income		3,202,969		2,546,259
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		161,923	[3]	239,333	[2]
Investments in joint ventures		$ 438,610		$ 237,449
Compania de financiamiento Tuya S.A [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business of Joint Venture		Financing company	[4],[5]	Financing company	[6]
Principal place of business of joint venture		Colombia	[4],[5]	Colombia	[6]
Proportion of ownership interest in joint venture		50.00%	[4],[5]	50.00%	[6]
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax		$ 27,623	[1],[4],[5]	$ 20,778	[2],[6]
Accumulated other comprehensive income		0	[4],[5],[7]	0	[6],[8]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[4],[5],[9]	0	[6],[10]
Investments in joint ventures		$ 431,510	[4],[5]	$ 225,548
Fideicomiso Ruta del Sol - compartimento A [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business of Joint Venture		Investment in infrastructure projects		Investment in infrastructure projects	[11]
Principal place of business of joint venture		Colombia		Colombia	[11]
Proportion of ownership interest in joint venture		50.00%		50.00%	[11]
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax		$ (9)	[1]	$ (6,385)	[2],[11]
Accumulated other comprehensive income		13	[7]	13	[8],[11]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[9]	0	[10],[11]
Investments in joint ventures		$ 0		$ 0
Servicios de Aceptacion S.A [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business of Joint Venture		Network data transmission services	[12]	Network data transmission services
Principal place of business of joint venture		Colombia	[12]	Colombia
Proportion of ownership interest in joint venture		50.00%	[12]	50.00%
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax		$ (110)	[1],[12]	$ 1,663	[2]
Accumulated other comprehensive income		0	[7],[12]	0	[8]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[9],[12]	0	[10]
Investments in joint ventures		$ 0	[12]	$ 4,688
Puntos Colombia S.A.S [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business of Joint Venture		Administration of the customers loyalty		Administration of the customers loyalty	[13]
Principal place of business of joint venture		Colombia		Colombia	[13]
Proportion of ownership interest in joint venture		50.00%		50.00%	[13]
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax		$ (1,613)	[1]	$ (1,787)	[2],[13]
Accumulated other comprehensive income		0	[7]	0	[8],[13]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method		0	[9]	0	[10],[13]
Investments in joint ventures		$ 5,600		$ 7,213	[13]
PA Servicios Tecnolgicos Arus Bancolombia [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Principal Business of Joint Venture	[14]	Technology services provider
Principal place of business of joint venture	[14]	Colombia
Proportion of ownership interest in joint venture	[14]	50.00%
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax	[1],[14]	$ 0
Accumulated other comprehensive income	[7],[14]	0
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method	[9],[14]	0
Investments in joint ventures	[14]	$ 1,500
[1]	Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018
[2]	Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2017. See note 24.5 Dividends received, and share of profits of equity method investees
[3]	Corresponds to the income recognized as equity method in the statement of income for the year ended December 31, 2018. See note 24.5 Dividends received, and share of profits of equity method investees
[4]	In March 2018, The Bank increases its capital contribution in Compañia de Financiamiento TUYA S.A for COP 5,000
[5]	The revaluation of the consumer loan portfolio in Colombia increased significantly during 2018, and there was an improvement in loan coverage rates due to the economic cycle in the country and the current payment behavior in the consumer segment.As a result, management measured the recoverable amount of Tuya's Cash Generation Unit (CGU). The measurement was estimated by determining the fair value of the asset which implies the professional services of a business valuation specialist; as a result of the valuation the Bank recognized a recovery of the impairment loss of COP 173,339. For more information about the applied valuation technique, see note 29 Fair value of assets and liabilities.
[6]	On December 2017, given the continued impairment of the consumer loans portfolio of the company during 2017, the Bank management performed a valuation, to establish the fair value of the Compañía de Financiamiento TUYA S.A. As a result of the valuation, the fair value of the investment was lower than the book value, for this, the Bank recorded an impairment in the statement of income for COP 173,339. See note 29 Fair value for assets and liabilities.
[7]	Corresponds to the accumulated other comprehensive income as of December 31, 2018.
[8]	Corresponds to the accumulated other comprehensive income as of December 31, 2017.
[9]	Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2018.
[10]	Corresponds to the other comprehensive income recognized as equity method for the year ended December 31, 2017.
[11]	Given the losses of Fideicomiso Ruta del Sol - compartimento A for the year 2017, the aplication of the equity method resulted in a reduction of the total book value of the investment.
[12]	The joint venture of Servicios de Aceptación SAS was derived from the alliance between Bancolombia and First Data for improving the development of the credit card business for individuals, however the strategy was refocused in 2018. Consequently, both parties agreed to advance in the development of this business considering First Data as the Bank’s service provider of processing data and to dissolve the joint venture.
[13]	In June 2017, Banca de Inversión Bancolombia formed a joint venture with Grupo Éxito. The purpose of the company is the developing and administration of customer’s loyalty programs provided by both parties in the agreement.
[14]	In December 2018, Banca de Inversión Bancolombia, a Bank’s subsidiary, entered into an agreement with ARUS whereby both parties have joint control to the net assets of P.A Servicios Tecnológicos Arus- Bancolombia. The purpose of the entity is to provide technology services.

INVESTMENTS IN ASSOCIATES AND_7

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Details 4) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Assets	$ 220,113,618	$ 203,908,211
Liabilities	193,458,393	179,478,661
Profits (loss)	2,786,435	2,754,173	$ 2,791,450
Compania de financiamiento Tuya S.A [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Assets	2,790,596	2,571,106
Liabilities	2,447,483	2,293,239
Income from ordinary activities	1,450,242	1,344,712
Profits (loss)	55,258	41,556
Dividends	$ 0	$ 371

INVESTMENTS IN ASSOCIATES AND_8

INVESTMENTS IN ASSOCIATES AND JOINT VENTURES (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Share of other comprehensive income of associates and joint ventures accounted for using equity method that will be reclassified to profit or loss, net of tax	$ 1,918	$ (11,547)	$ (1,718)
Adjustments for undistributed profits of investments accounted for using equity method	$ (187,814)	(253,602)	(60,254)
Other comprehensive income, before tax, exchange differences on translation			3,029
Dividends received from associates, classified as investing activities			$ 38,036
Fideicomiso Ruta del Sol - Compartimiento A [Member]
Disclosure Of Interests In Other Entities Explanatory [Line Items]
Estimated financial effect of contingent liabilities		$ 12,342

GOODWILL AND INTANGIBLE ASSET_3

GOODWILL AND INTANGIBLE ASSETS, NET (Details) $ in Millions, $ in Millions	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016COP ($)
Disclosure of detailed information about intangible assets [abstract]
Intangible assets	$ 563,452	$ 563,452	$ 535,465	$ 535,465
Goodwill	6,638,403		6,095,959		$ 6,130,095
Total	$ 7,201,855		$ 6,631,424

GOODWILL AND INTANGIBLE ASSET_4

GOODWILL AND INTANGIBLE ASSETS, NET (Details 1) $ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	$ 535,465	$ 535,465
Intangible assets at ending period	563,452	$ 563,452	$ 535,465
Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	888,585		845,330
Acquisitions	133,376		70,681
Write off	(29,663)		(24,296)
Foreign currency translation adjustment	55,967		(3,130)
Intangible assets at ending period	1,048,265		888,585
Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	(353,120)		(281,388)
Write off	25,929		44,690
Amortization expense	(123,551)		(116,752)
Foreign currency translation adjustment	(34,071)		330
Intangible assets at ending period	(484,813)		(353,120)
Trademarks [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	12,602
Intangible assets at ending period	10,979		12,602
Trademarks [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	17,642		17,741
Acquisitions	0		0
Write off	0		0
Foreign currency translation adjustment	1,571		(99)
Intangible assets at ending period	19,213		17,642
Trademarks [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	(5,040)		(2,533)
Write off	0		0
Amortization expense	(2,497)		(2,493)
Foreign currency translation adjustment	(697)		(14)
Intangible assets at ending period	(8,234)		(5,040)
Licenses, software and computer applications [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	323,369
Intangible assets at ending period	397,700		323,369
Licenses, software and computer applications [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	526,923		481,643
Acquisitions	133,376		70,681
Write off	(29,663)		(24,296)
Foreign currency translation adjustment	23,758		(1,105)
Intangible assets at ending period	654,394		526,923
Licenses, software and computer applications [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	(203,554)		(200,995)
Write off	25,929		44,690
Amortization expense	(64,204)		(47,698)
Foreign currency translation adjustment	(14,865)		449
Intangible assets at ending period	(256,694)		(203,554)
Client relationships [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	199,494
Intangible assets at ending period	154,773		199,494
Client relationships [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	344,020		345,946
Acquisitions	0		0
Write off	0		0
Foreign currency translation adjustment	30,638		(1,926)
Intangible assets at ending period	374,658		344,020
Client relationships [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Intangible assets at beginning period	(144,526)		(77,860)
Write off	0		0
Amortization expense	(56,850)		(66,561)
Foreign currency translation adjustment	(18,509)		(105)
Intangible assets at ending period	$ (219,885)		$ (144,526)

GOODWILL AND INTANGIBLE ASSET_5

GOODWILL AND INTANGIBLE ASSETS, NET (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about intangible assets [line items]
Balance	$ 6,095,959	$ 6,130,095
Effect of change in foreign exchange rate	542,444	(34,136)
Balance	$ 6,638,403	$ 6,095,959

GOODWILL AND INTANGIBLE ASSET_6

GOODWILL AND INTANGIBLE ASSETS, NET (Details 3) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about intangible assets [line items]
Goodwill 2017	$ 6,638,403	$ 6,095,959	$ 6,130,095
Banking El Salvador [Member]
Disclosure of detailed information about intangible assets [line items]
Goodwill 2017	$ 916,673
Valuation Methodology	Discounted Cash flow
Key Assumptions	5 years plan
Discount Rate (real)	12.40%
Growth rate (real)	3.90%
Banking Panama [Member]
Disclosure of detailed information about intangible assets [line items]
Goodwill 2017	$ 4,963,252
Valuation Methodology	Discounted Cash flow
Key Assumptions	5 years plan
Discount Rate (real)	9.10%
Growth rate (real)	6.70%
Banking Guatemala [Member]
Disclosure of detailed information about intangible assets [line items]
Goodwill 2017	$ 758,478
Valuation Methodology	Discounted Cash flow
Key Assumptions	5 years plan
Discount Rate (real)	11.70%
Growth rate (real)	5.20%

GOODWILL AND INTANGIBLE ASSET_7

GOODWILL AND INTANGIBLE ASSETS, NET (Details 4) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Banking Panama [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	9.10%
Growth rate used to extrapolate cash flow projections	6.70%
Discount Rate [Member] | Banking Panama [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	9.10%	8.90%
Discount Rate [Member] | Banking Panama [Member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	9.35%	9.15%
Recoverable amount of asset or cash-generating unit	$ 10,044,682	$ 9,750,408
Discount Rate [Member] | Banking Panama [Member] | Weighted Average [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	9.10%	8.90%
Recoverable amount of asset or cash-generating unit	$ 11,157,929	$ 10,939,812
Discount Rate [Member] | Banking Panama [Member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	8.85%	8.65%
Recoverable amount of asset or cash-generating unit	$ 12,531,296	$ 12,435,319
Discount Rate [Member] | Banking Banking El Salvador [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	12.40%	12.30%
Discount Rate [Member] | Banking Banking El Salvador [Member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	12.65%	12.55%
Recoverable amount of asset or cash-generating unit	$ 2,893,147	$ 2,520,931
Discount Rate [Member] | Banking Banking El Salvador [Member] | Weighted Average [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	12.40%	12.30%
Recoverable amount of asset or cash-generating unit	$ 2,975,432	$ 2,588,656
Discount Rate [Member] | Banking Banking El Salvador [Member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	12.15%	12.05%
Recoverable amount of asset or cash-generating unit	$ 3,062,694	$ 2,660,269
Discount Rate [Member] | Banking Banking Guatemala [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	11.70%	11.30%
Discount Rate [Member] | Banking Banking Guatemala [Member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	11.95%	11.55%
Recoverable amount of asset or cash-generating unit	$ 1,649,883	$ 2,239,238
Discount Rate [Member] | Banking Banking Guatemala [Member] | Weighted Average [Member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	11.70%	11.30%
Recoverable amount of asset or cash-generating unit	$ 1,719,017	$ 2,339,936
Discount Rate [Member] | Banking Banking Guatemala [Member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Discount rate applied to cash flow projections	11.45%	11.05%
Recoverable amount of asset or cash-generating unit	$ 1,793,745	$ 2,449,482
Growth Rate [Member] | Banking Panama [Member]
Disclosure of detailed information about intangible assets [line items]
Growth rate used to extrapolate cash flow projections	6.70%	6.70%
Growth Rate [Member] | Banking Panama [Member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 10,458,284	$ 10,161,356
Growth rate used to extrapolate cash flow projections	6.45%	6.45%
Growth Rate [Member] | Banking Panama [Member] | Weighted Average [Member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 11,157,929	$ 10,939,812
Growth rate used to extrapolate cash flow projections	6.70%	6.70%
Growth Rate [Member] | Banking Panama [Member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 12,020,283	$ 11,917,875
Growth rate used to extrapolate cash flow projections	6.95%	6.95%
Growth Rate [Member] | Banking Banking El Salvador [Member]
Disclosure of detailed information about intangible assets [line items]
Growth rate used to extrapolate cash flow projections	3.90%	3.40%
Growth Rate [Member] | Banking Banking El Salvador [Member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 2,945,601	$ 2,564,330
Growth rate used to extrapolate cash flow projections	3.65%	3.15%
Growth Rate [Member] | Banking Banking El Salvador [Member] | Weighted Average [Member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 2,975,432	$ 2,588,656
Growth rate used to extrapolate cash flow projections	3.90%	3.40%
Growth Rate [Member] | Banking Banking El Salvador [Member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 3,007,065	$ 2,614,375
Growth rate used to extrapolate cash flow projections	4.15%	3.65%
Growth Rate [Member] | Banking Banking Guatemala [Member]
Disclosure of detailed information about intangible assets [line items]
Growth rate used to extrapolate cash flow projections	5.20%	5.30%
Growth Rate [Member] | Banking Banking Guatemala [Member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 1,684,998	$ 2,295,042
Growth rate used to extrapolate cash flow projections	4.95%	5.05%
Growth Rate [Member] | Banking Banking Guatemala [Member] | Weighted Average [Member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 1,719,017	$ 2,339,936
Growth rate used to extrapolate cash flow projections	5.20%	5.30%
Growth Rate [Member] | Banking Banking Guatemala [Member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Recoverable amount of asset or cash-generating unit	$ 1,755,758	$ 2,388,737
Growth rate used to extrapolate cash flow projections	5.45%	5.55%

GOODWILL AND INTANGIBLE ASSET_8

GOODWILL AND INTANGIBLE ASSETS, NET (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about intangible assets [line items]
Research and Development Expense	$ 78,222	$ 105,145	$ 16,715
Intangible Assets Controlled by Entity but not Recognised	$ 41,690	$ 23,180	$ 16,217

PREMISES AND EQUIPMENT, NET (De

PREMISES AND EQUIPMENT, NET (Details) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	$ 3,127,405		$ 3,115,697
Acquisitions	921,256		1,039,913
Expenses - depreciation	(317,751)	[1]	(316,281)	[2]
Disposals	(299,502)		(473,683)
Assets classified as held for sale	(114,203)		(206,081)
Subsidiary liquidation			(23,106)
Effect of changes in foreign exchange rate	51,442		(9,054)
Balance at Ending	3,368,647		3,127,405
Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	109,469
Acquisitions	84,290
Expenses - depreciation	(24,854)
Disposals	(1,485)
Assets classified as held for sale	(13,467)
Effect of changes in foreign exchange rate	10,403
Balance at Ending	164,356		109,469
Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	4,742,492		4,615,370
Acquisitions	921,487		1,042,779
Expenses - depreciation	0		0
Disposals	(387,316)		(523,586)
Assets classified as held for sale	(180,769)		(325,016)
Subsidiary liquidation			(38,894)
Effect of changes in foreign exchange rate	126,576		(28,161)
Balance at Ending	5,222,470		4,742,492
Gross carrying amount [member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	142,871
Acquisitions	84,344
Expenses - depreciation	0
Disposals	(1,850)
Assets classified as held for sale	(26,913)
Effect of changes in foreign exchange rate	12,459
Balance at Ending	210,911		142,871
Gross carrying amount [member] | Land [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	337,362		334,499
Acquisitions	20,924		4,050
Expenses - depreciation	0		0
Disposals	(6,079)		(904)
Assets classified as held for sale	0		0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate	9,525		(283)
Balance at Ending	361,732		337,362
Gross carrying amount [member] | Construction in Progress [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	5,129		32,883
Acquisitions	6,485		48,849
Expenses - depreciation	0		0
Disposals	(8,448)		(76,066)
Assets classified as held for sale	0		0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate	(713)		(537)
Balance at Ending	2,453		5,129
Gross carrying amount [member] | Buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	1,304,539		1,185,296
Acquisitions	21,817		130,766
Expenses - depreciation	0		0
Disposals	(34,850)		(27,041)
Assets classified as held for sale	(5,916)		0
Subsidiary liquidation			(5,973)
Effect of changes in foreign exchange rate	58,927		21,491
Balance at Ending	1,344,517		1,304,539
Gross carrying amount [member] | Furniture and fixtures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	601,275		572,699
Acquisitions	28,221		40,187
Expenses - depreciation	0		0
Disposals	(24,861)		(12,647)
Assets classified as held for sale	0		(111)
Subsidiary liquidation			(37)
Effect of changes in foreign exchange rate	24,793		1,184
Balance at Ending	629,428		601,275
Gross carrying amount [member] | Furniture and fixtures [member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	111
Acquisitions	0
Expenses - depreciation	0
Disposals	0
Assets classified as held for sale	0
Effect of changes in foreign exchange rate	(1)
Balance at Ending	110		111
Gross carrying amount [member] | Computer Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	782,476		717,464
Acquisitions	142,451		100,939
Expenses - depreciation	0		0
Disposals	(50,282)		(29,301)
Assets classified as held for sale	(4,708)		(6,025)
Subsidiary liquidation			(39)
Effect of changes in foreign exchange rate	26,874		(562)
Balance at Ending	896,811		782,476
Gross carrying amount [member] | Computer Equipment [Member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	113
Acquisitions	0
Expenses - depreciation	0
Disposals	0
Assets classified as held for sale	0
Effect of changes in foreign exchange rate	7
Balance at Ending	120		113
Gross carrying amount [member] | Vehicles [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	1,410,709		1,461,628
Acquisitions	679,356		650,232
Expenses - depreciation	0		0
Disposals	(249,771)		(305,457)
Assets classified as held for sale	(170,145)		(318,880)
Subsidiary liquidation			(32,845)
Effect of changes in foreign exchange rate	1,701		(43,969)
Balance at Ending	1,671,850		1,410,709
Gross carrying amount [member] | Vehicles [Member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	142,647
Acquisitions	84,344
Expenses - depreciation	0
Disposals	(1,850)
Assets classified as held for sale	(26,913)
Effect of changes in foreign exchange rate	12,453
Balance at Ending	210,681		142,647
Gross carrying amount [member] | Airplane [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	0		60,614
Acquisitions			0
Expenses - depreciation			0
Disposals			(59,614)
Assets classified as held for sale			0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate			(1,000)
Balance at Ending			0
Gross carrying amount [member] | Ongoing Imports [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	3,502		1,929
Acquisitions	3,053		6,472
Expenses - depreciation	0		0
Disposals	(5,288)		(4,744)
Assets classified as held for sale	0		0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate	0		(155)
Balance at Ending	1,267		3,502
Gross carrying amount [member] | Leasehold Improvements [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	297,500		248,358
Acquisitions	19,180		61,284
Expenses - depreciation	0		0
Disposals	(7,737)		(7,812)
Assets classified as held for sale	0		0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate	5,469		(4,330)
Balance at Ending	314,412		297,500
Accumulated depreciation and amortisation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(1,615,087)		(1,499,673)
Acquisitions	(231)		(2,866)
Expenses - depreciation	(317,751)		(316,281)
Disposals	87,814		49,903
Assets classified as held for sale	66,566		118,935
Subsidiary liquidation			15,788
Effect of changes in foreign exchange rate	(75,134)		19,107
Balance at Ending	(1,853,823)		(1,615,087)
Accumulated depreciation and amortisation [member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(33,402)
Acquisitions	(54)
Expenses - depreciation	(24,854)
Disposals	365
Assets classified as held for sale	13,446
Effect of changes in foreign exchange rate	(2,056)
Balance at Ending	(46,555)		(33,402)
Accumulated depreciation and amortisation [member] | Buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(285,118)		(259,400)
Acquisitions	0		0
Expenses - depreciation	(29,199)		(29,451)
Disposals	2,913		3,449
Assets classified as held for sale	0		0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate	(19,587)		284
Balance at Ending	(330,991)		(285,118)
Accumulated depreciation and amortisation [member] | Furniture and fixtures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(334,054)		(300,731)
Acquisitions	0		0
Expenses - depreciation	(36,073)		(39,912)
Disposals	18,695		9,317
Assets classified as held for sale	0		95
Subsidiary liquidation			30
Effect of changes in foreign exchange rate	(7,502)		(2,853)
Balance at Ending	(358,934)		(334,054)
Accumulated depreciation and amortisation [member] | Furniture and fixtures [member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(95)
Acquisitions	0
Expenses - depreciation	(9)
Disposals	0
Assets classified as held for sale	0
Effect of changes in foreign exchange rate	2
Balance at Ending	(102)		(95)
Accumulated depreciation and amortisation [member] | Computer Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(497,976)		(477,339)
Acquisitions	0		0
Expenses - depreciation	(80,980)		(73,772)
Disposals	47,345		46,358
Assets classified as held for sale	4,578		5,740
Subsidiary liquidation			18
Effect of changes in foreign exchange rate	(40,693)		1,019
Balance at Ending	(567,726)		(497,976)
Accumulated depreciation and amortisation [member] | Computer Equipment [Member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(86)
Acquisitions	0
Expenses - depreciation	(12)
Disposals	0
Assets classified as held for sale	0
Effect of changes in foreign exchange rate	(14)
Balance at Ending	(112)		(86)
Accumulated depreciation and amortisation [member] | Vehicles [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(371,276)		(387,491)
Acquisitions	(231)		(2,866)
Expenses - depreciation	(145,529)		(144,159)
Disposals	11,673		14,022
Assets classified as held for sale	61,988		113,100
Subsidiary liquidation			15,740
Effect of changes in foreign exchange rate	(652)		20,378
Balance at Ending	(444,027)		(371,276)
Accumulated depreciation and amortisation [member] | Vehicles [Member] | Non-current assets held for sale [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(33,221)
Acquisitions	(54)
Expenses - depreciation	(24,833)
Disposals	365
Assets classified as held for sale	13,446
Effect of changes in foreign exchange rate	(2,044)
Balance at Ending	(46,341)		(33,221)
Accumulated depreciation and amortisation [member] | Airplane [member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	0		(6,227)
Acquisitions			0
Expenses - depreciation			(356)
Disposals			6,480
Assets classified as held for sale			0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate			103
Balance at Ending			0
Accumulated depreciation and amortisation [member] | Leasehold Improvements [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance at Beginning	(126,663)		(68,485)
Acquisitions	0		0
Expenses - depreciation	(25,970)		(28,631)
Disposals	7,188		(29,723)
Assets classified as held for sale	0		0
Subsidiary liquidation			0
Effect of changes in foreign exchange rate	(6,700)		176
Balance at Ending	$ (152,145)		$ (126,663)
[1]	The difference with the Consolidated Statement of Income is the expense depreciation by the premises and equipment of the investments classified as assets held for sale, the amortization of intangible assets and impairment of other assets. See Note 25.2 Impairment, depreciation and amortization.
[2]	The difference with the Consolidated Statement of Income is the expense depreciation by premises and equipment of the investments classified as assets held for sale, the amortization of intangible assets and impairment of other assets. See Note 25.2 Impairment, depreciation and amortization.

INVESTMENT PROPERTIES (Details)

INVESTMENT PROPERTIES (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Disclosure of detailed information about investment property [line items]
Balance at the beginning of the year	[1]	$ 1,657,409
Gains on valuation		77,350		$ 55,573		$ 149,299
Balance at the end of the period	[1]	1,732,873		1,657,409
Investment property [member]
Disclosure of detailed information about investment property [line items]
Balance at the beginning of the year		1,657,409	[1],[2]	1,581,689
Acquisitions		8,536		92,102
Sales/Write-offs		(10,422)		(71,955)
Gains on valuation	[3]	77,350		55,573
Balance at the end of the period		$ 1,732,873	[1],[2]	$ 1,657,409	[1],[2]	$ 1,581,689
[1]	Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC).
[2]	Between December 31, 2018 and 2017 there were no transfers in and out of Level 3 fair value hierarchy related with investment properties. See Note 29 Fair value of assets and liabilities.
[3]	See note 24.4. Other operating income, net.

INVESTMENT PROPERTIES (Details

INVESTMENT PROPERTIES (Details 1) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Disclosure of detailed information about investment property [line items]
Balance at the beginning of the year	[1]	$ 1,657,409
Appraisals		77,350		$ 55,573		$ 149,299
Balance at the end of the period	[1]	1,732,873		1,657,409
Investment property [member]
Disclosure of detailed information about investment property [line items]
Balance at the beginning of the year		1,657,409	[1],[2]	1,581,689
Appraisals	[3]	77,350		55,573
Net increase in (decrease) in investment properties		(1,886)		20,147
Balance at the end of the period		1,732,873	[1],[2]	1,657,409	[1],[2]	1,581,689
Buildings [member] | Investment property [member]
Disclosure of detailed information about investment property [line items]
Balance at the beginning of the year		1,425,585	[1]	1,355,717
Appraisals		59,895		49,721
Net increase in (decrease) in investment properties		(1,886)		20,147
Balance at the end of the period		1,483,594	[1]	1,425,585	[1]	1,355,717
Land [Member] | Investment property [member]
Disclosure of detailed information about investment property [line items]
Balance at the beginning of the year		231,824	[1]	225,972
Appraisals		17,455		5,852
Net increase in (decrease) in investment properties		0		0
Balance at the end of the period		$ 249,279	[1]	$ 231,824	[1]	$ 225,972
[1]	Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC).
[2]	Between December 31, 2018 and 2017 there were no transfers in and out of Level 3 fair value hierarchy related with investment properties. See Note 29 Fair value of assets and liabilities.
[3]	See note 24.4. Other operating income, net.

INVESTMENT PROPERTIES (Detail_2

INVESTMENT PROPERTIES (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about investment property [abstract]
Income from rentals	$ 79,756	$ 77,964	$ 66,838
Investment properties that generated income through rentals	16,531	21,012	21,254
Investment properties that did not generate income through rentals	$ 1,630	$ 2,295	$ 2,495

INCOME TAX (Details)

INCOME TAX (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current tax
Fiscal year		$ 752,728	$ 1,041,454	$ 813,355
Previous fiscal years	[1]	(146,837)	3,967	2,519
Total current tax		605,891	1,045,421	815,874
Deferred tax
Fiscal year		223,544	193,177	360,958
Total deferred tax		223,544	193,177	360,958
Total tax		$ 829,435	$ 1,238,598	$ 1,176,832
[1]	The recoveries of previous periods for $ 85,921 was recognized in 2017 in Bancolombia as income.

INCOME TAX (Details 1)

INCOME TAX (Details 1) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amount before taxes
Revaluation losses related to the defined benefit liability	$ 37,325	$ 3,753	$ 626
Unrealized gains/(loss) on investments in associates and joint ventures using equity method.	2,581	(11,547)	(1,718)
Net income (loss) from financial instruments measured at fair value	(16,873)	17,548	208,276
Net profit (loss) on foreign investment hedge	458,943	449,640
Net	481,976	470,941	208,902
Expenses or (income) per tax
Revaluation losses related to the defined benefit liability	7,663	3,725	10,966
Unrealized gains/(loss) on investments in associates and joint ventures using equity method.	663
Net profit (loss) by financial instruments measured at fair value	(10,190)	(9,789)	(24,341)
Net profit (loss) on foreign investment hedge	(172,870)	6,895	0
Net	174,734	831	(13,375)
Net taxes
Remeasurement loss related to defined benefit liability	29,662	28	(10,340)
Unrealized gains/(loss) on investments in associates and joint ventures using equity method.	1,918	(11,547)	(1,718)
Net profit (loss) by financial instruments measured at fair value	33,838	38,884	232,617
Net profit (loss) on foreign investment hedge	631,813	442,745	(345,412)
Net	$ 656,710	$ 470,110	$ 222,277

INCOME TAX (Details 2)

INCOME TAX (Details 2)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Explanation of applicable rates
Total	30.00%	34.00%	35.00%	37.00%
Country of domicile [member]
Explanation of applicable rates
Rent					33.00%	34.00%	25.00%
CREE					0.00%	0.00%	9.00%
Surcharge					4.00%	6.00%	6.00%
Total					37.00%	40.00%	40.00%

INCOME TAX (Details 3)

INCOME TAX (Details 3)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Explanation of applicable rates
Applicable tax rate	30.00%	31.00%	32.00%	33.00%
Peru [Member] | 2017 [member]
Explanation of applicable rates
Applicable tax rate					29.50%
Peru [Member] | 2018 [member]
Explanation of applicable rates
Applicable tax rate					29.50%
Peru [Member] | 2019 [member]
Explanation of applicable rates
Applicable tax rate					29.50%
Panama [Member] | 2017 [member]
Explanation of applicable rates
Applicable tax rate					25.00%
Panama [Member] | 2018 [member]
Explanation of applicable rates
Applicable tax rate					25.00%
Panama [Member] | 2019 [member]
Explanation of applicable rates
Applicable tax rate					25.00%
El Salvador [Member] | 2017 [member]
Explanation of applicable rates
Applicable tax rate					30.00%
El Salvador [Member] | 2018 [member]
Explanation of applicable rates
Applicable tax rate					30.00%
El Salvador [Member] | 2019 [member]
Explanation of applicable rates
Applicable tax rate					30.00%
Guatemala [Member] | 2017 [member]
Explanation of applicable rates
Applicable tax rate					25.00%
Guatemala [Member] | 2018 [member]
Explanation of applicable rates
Applicable tax rate					25.00%
Guatemala [Member] | 2019 [member]
Explanation of applicable rates
Applicable tax rate					25.00%

INCOME TAX (Details 4)

INCOME TAX (Details 4) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Local Subsidiaries [Member]
Disclosure Of Income Tax [Line Items]
Temporary differences	$ (442,739)	$ (4,547,635)
Foreign Subsidiaries [Member]
Disclosure Of Income Tax [Line Items]
Temporary differences	$ (1,043,724)	$ (4,533,672)

INCOME TAX (Details 5)

INCOME TAX (Details 5) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	$ 271,177	$ 148,614
Net deferred tax liabilities	(1,318,295)	(1,440,198)
Deferred tax liability (asset)	(1,047,118)	(1,291,584)
Arrendadora Financiera S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	94	299
Bagrícola Costa Rica S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	74	56
Net deferred tax liabilities		0
Grupo Agromercantil Holding [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(13,566)	(29,924)
Banca de Inversión Bancolombia S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(20,300)	(26,432)
Banco Agrícola S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	67,527	46,328
Net deferred tax liabilities		0
Bancolombia S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(1,245,807)	(1,368,062)
Banistmo S.A. y Filiales [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	198,958	96,533
Net deferred tax liabilities		0
BIBA Inmobiliaria S.A.S. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(19)	(5)
Fiduciaria Bancolombia S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		1,808
Net deferred tax liabilities	(4,265)	0
Inversiones CFNS S.A.S. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(1,011)	(700)
Transportempo S.A.S [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	163	509
Net deferred tax liabilities		0
Valores Bancolombia S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	4,342	3,071
Net deferred tax liabilities		0
Valores Simesa S.A. [member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(10,754)	(9,421)
Renting Colombia S.A. [Member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	(22,450)	(5,466)
Valores Banagricola S.A. [Member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets	19	10
Net deferred tax liabilities		0
Trust Fund "Lote Abelardo Castro" [Member]
Disclosure Of Income Tax [Line Items]
Net deferred tax assets		0
Net deferred tax liabilities	$ (123)	$ (188)

INCOME TAX (Details 6)

INCOME TAX (Details 6) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	$ (1,291,584)
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	(165,645)
Net deferred tax, With OCI effects	438,756
Net deferred tax, Eliminations	(56,939)
Net deferred tax, Reclassifications	28,294
Net deferred tax at December 31, 2018	(1,047,118)
Deferred tax asset
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	602,865
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	127,463
Net deferred tax, With OCI effects	435,826
Net deferred tax, Eliminations	(5,752)
Net deferred tax, Reclassifications	22,275
Net deferred tax at December 31, 2018	1,182,677
Deferred tax liability
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	(1,894,449)
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	(293,108)
Net deferred tax, With OCI effects	2,930
Net deferred tax, Eliminations	(51,187)
Net deferred tax, Reclassifications	6,019
Net deferred tax at December 31, 2018	(2,229,795)
Assets deferred tax Results
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	559,220
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	127,463
Net deferred tax, With OCI effects	0
Net deferred tax, Eliminations	(5,752)
Net deferred tax, Reclassifications	23,870
Net deferred tax at December 31, 2018	704,801
Assets deferred tax OCI and Equity
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	43,645
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	0
Net deferred tax, With OCI effects	435,826
Net deferred tax, Eliminations	0
Net deferred tax, Reclassifications	(1,595)
Net deferred tax at December 31, 2018	477,876
Liability deferred tax Results
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	(1,784,575)
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	(293,108)
Net deferred tax, With OCI effects	0
Net deferred tax, Eliminations	(50,524)
Net deferred tax, Reclassifications	6,206
Net deferred tax at December 31, 2018	(2,122,001)
Liability deferred tax OCI and Equity
Disclosure Of Income Tax [Line Items]
Net deferred tax at December 31, 2017	(109,874)
Net deferred tax, With effects on the statement of income and Foreign currency translation adjustments	0
Net deferred tax, With OCI effects	2,930
Net deferred tax, Eliminations	(663)
Net deferred tax, Reclassifications	187
Net deferred tax at December 31, 2018	$ (107,794)

INCOME TAX (Details 7)

INCOME TAX (Details 7) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
Disclosure Of Income Tax [Line Items]
December 31,2017	$ 559,220
Implementation of Deferred Tax Assets	260,042
Increase In Deferred Tax Assets	405,623
December 31, 2018	704,801
December 31, 2017	(1,784,575)
Implementation of Deferred Tax Liability	401,523
Increase In Deferred Tax Liability	738,949
December 31, 2018	(2,122,001)
Property and equipment [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	21,153
Implementation of Deferred Tax Assets	3,848
Increase In Deferred Tax Assets	812
December 31, 2018	18,117
December 31, 2017	(233,550)
Implementation of Deferred Tax Liability	16,225
Increase In Deferred Tax Liability	26,005
December 31, 2018	(243,330)
Employee benefits [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	161,524
Implementation of Deferred Tax Assets	2,021
Increase In Deferred Tax Assets	12,824
December 31, 2018	172,327
December 31, 2017	(4,401)
Implementation of Deferred Tax Liability	721
Increase In Deferred Tax Liability	237
December 31, 2018	(3,917)
Deterioration assessment [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	204,910
Implementation of Deferred Tax Assets	207,296
Increase In Deferred Tax Assets	59,306
December 31, 2018	56,920
December 31, 2017	(6,412)
Implementation of Deferred Tax Liability	4,923
Increase In Deferred Tax Liability	373,689
December 31, 2018	(375,178)
Tax credits settlement [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	68,463
Implementation of Deferred Tax Assets	209
Increase In Deferred Tax Assets	5,935
December 31, 2018	74,189
Participatory Titles Evaluation [Member]
Disclosure Of Income Tax [Line Items]
December 31, 2017	(121,210)
Implementation of Deferred Tax Liability	40,084
Increase In Deferred Tax Liability	58,837
December 31, 2018	(139,963)
Financial obligations [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	51,863
Implementation of Deferred Tax Assets	1,916
Increase In Deferred Tax Assets	241,918
December 31, 2018	291,865
Investments evaluation [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	81
Implementation of Deferred Tax Assets	6,495
Increase In Deferred Tax Assets	80,277
December 31, 2018	73,863
December 31, 2017	(105,473)
Implementation of Deferred Tax Liability	14,247
Increase In Deferred Tax Liability	4,057
December 31, 2018	(95,283)
Leasing re-expression [Member]
Disclosure Of Income Tax [Line Items]
December 31, 2017	(455,610)
Implementation of Deferred Tax Liability	242,251
Increase In Deferred Tax Liability	0
December 31, 2018	(213,359)
Derivatives' evaluation [Member]
Disclosure Of Income Tax [Line Items]
December 31, 2017	(56,726)
Implementation of Deferred Tax Liability	0
Increase In Deferred Tax Liability	121,744
December 31, 2018	(178,470)
Goodwill [Member]
Disclosure Of Income Tax [Line Items]
December 31, 2017	(758,888)
Implementation of Deferred Tax Liability	18,818
Increase In Deferred Tax Liability	118,779
December 31, 2018	(858,849)
Properties Received in Payment [Member]
Disclosure Of Income Tax [Line Items]
December 31, 2017	(47,509)
Implementation of Deferred Tax Liability	2,563
Increase In Deferred Tax Liability	32,097
December 31, 2018	(77,043)
Other deductions [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	51,226
Implementation of Deferred Tax Assets	38,257
Increase In Deferred Tax Assets	4,551
December 31, 2018	17,520
December 31, 2017	(104,670)
Implementation of Deferred Tax Liability	76,659
Increase In Deferred Tax Liability	7,798
December 31, 2018	$ (35,809)

INCOME TAX (Details 8)

INCOME TAX (Details 8) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
Disclosure Of Income Tax [Line Items]
December 31,2017	$ 559,220
Realization of Deferred Tax Assets	260,042
Increase In Deferred Tax Assets	405,623
December 31, 2018	704,801
December 31, 2017	(1,784,575)
Realization of Deferred Tax Liability	401,523
Increase In Deferred Tax Liability	738,949
December 31, 2018	(2,122,001)
Employee Benefits [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	161,524
Realization of Deferred Tax Assets	2,021
Increase In Deferred Tax Assets	12,824
December 31, 2018	172,327
December 31, 2017	(4,401)
Realization of Deferred Tax Liability	721
Increase In Deferred Tax Liability	237
December 31, 2018	(3,917)
Investments evaluation [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	81
Realization of Deferred Tax Assets	6,495
Increase In Deferred Tax Assets	80,277
December 31, 2018	73,863
December 31, 2017	(105,473)
Realization of Deferred Tax Liability	14,247
Increase In Deferred Tax Liability	4,057
December 31, 2018	(95,283)
Investments Hedges In Foreign Operations [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	6,895
Realization of Deferred Tax Assets	0
Increase In Deferred Tax Assets	172,870
December 31, 2018	179,765
Investments In Associates Accounted For Using Equity Method [member]
Disclosure Of Income Tax [Line Items]
December 31, 2017	0
Realization of Deferred Tax Liability	0
Increase In Deferred Tax Liability	663
December 31, 2018	(663)
IFRS 9 implementation adjustment [Member]
Disclosure Of Income Tax [Line Items]
December 31,2017	0	[1]
Realization of Deferred Tax Assets	17,614	[1]
Increase In Deferred Tax Assets	287,122	[1]
December 31, 2018	269,508	[1]
December 31, 2017	0	[1],[2]
Realization of Deferred Tax Liability	0	[1],[2]
Increase In Deferred Tax Liability	7,931	[1],[2]
December 31, 2018	$ (7,931)	[1],[2]
[1]	Value recorded against retained earnings, not other comprehensive income (ORI)
[2]	Effect on Grupo Agromercantil Holding due to an increase in the investments evaluation

INCOME TAX (Details 9)

INCOME TAX (Details 9) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disclosure Of Income Tax [Abstract]
Accounting profit		$ 3,615,870	$ 3,992,771	[1]	$ 3,968,282	[2]
Applicable tax with nominal rate		1,337,872	1,597,108		1,587,313
Non-deductible expenses to determine taxable profit (loss)		266,246	356,350		255,435
Accounting and non-tax expense (income) to determine of taxable profit (loss)		(168,134)	(179,605)		(217,056)
Base Differences		486,193	341,828		(348,985)
Fiscal and non-accounting expense (income) to determine of taxable profit (loss)	[3]	(579,660)	(23,844)		23,381
Ordinary activities income exempt from taxation		(235,560)	(181,406)		(121,917)
Ordinary activities income not constituting income or occasional tax gain		(133,211)	(130,272)		(111,027)
Tax deductions		(25,398)	(184,620)		(107,083)
Goodwill Depreciation		(218,277)	(233,004)		0
Tax depreciation surplus		(118,046)	(177,936)		(20,323)
Tax rate effect in other countries	[4]	(92,125)	(218,785)		72,144
Prior fiscal terms		(146,837)	3,967		2,519
Other effects of the tax rate by reconciliation between accounting profit and tax expense (income)		456,372	268,817		162,431
Total tax		$ 829,435	$ 1,238,598		$ 1,176,832
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[3]	The variation originates mainly from the Participation Method (current tax) and the tax recognition of derivatives
[4]	The variation originates in adjustments for eliminations to the consolidated financial statements.

INCOME TAX (Details 11)

INCOME TAX (Details 11) $ in Millions	Dec. 31, 2018COP ($)
Disclosure Of Income Tax [Abstract]
Income Tax loss carryforward Minimum Base	$ 224,817
Unused Tax Losses for Which Deferred Tax Asset Recognised	$ 74,190

INCOME TAX (Details 12)

INCOME TAX (Details 12) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
Balance At Beginning	$ 353,338
Balance At Ending	114,968
Tax contingent liability [member]
Update	13,606
Payments	156,953
Reversal	$ 95,023

INCOME TAX (Details 13)

INCOME TAX (Details 13)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Rate	30.00%	31.00%	32.00%	33.00%
Additional points	0.00%	3.00%	3.00%	4.00%
Total rate	30.00%	34.00%	35.00%	37.00%

INCOME TAX (Details 14)

INCOME TAX (Details 14)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Income Tax [Line Items]
Total	30.00%	31.00%	32.00%	33.00%
2019 [Member]
Disclosure Of Income Tax [Line Items]
Rent					33.00%
Additional points					4.00%
Total					37.00%
2020 [Member]
Disclosure Of Income Tax [Line Items]
Rent					32.00%
Additional points					3.00%
Total					35.00%
2021 [Member]
Disclosure Of Income Tax [Line Items]
Rent					31.00%
Additional points					3.00%
Total					34.00%
2022 [Member]
Disclosure Of Income Tax [Line Items]
Rent					30.00%
Additional points					0.00%
Total					30.00%

INCOME TAX (Details Textual)

INCOME TAX (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Income Tax [Line Items]
Ordinary income tax rate					10.00%
Applicable tax rate	30.00%	31.00%	32.00%	33.00%
Borrowings, maturity					30
Deductions in Income Tax Rate	100.00%	50.00%	50.00%	50.00%	100.00%
Percentage of Witholding Tax Rate on Dividends					7.50%
Percentage of General Income Tax Rates Levied on Dividends	30.00%	31.00%	32.00%	(33.00%)
Percentage of Income tax on Capital Investments Dividends Paid but yet to be Levied					7.50%
Percentage of Income tax on Capital Investments Dividends Not Paid and Yet to be Levied					25.00%
Percentage of Retention Rate on Dividends					7.50%
Description of Requirement to be a Beneficiary of Regime of Colombian Holding Company					10.00%
Percentage of presumed Income on Net Equity					3.50%
Deferred Tax Assets Liability Without Eliminations					$ 165,645
Deferred Tax Assets Liability With Eliminations					56,939
Deferred tax liability (asset)					$ (1,047,118)	$ (1,291,584)
Income And Other Terms Terms					when the taxable income is equal to or greater than 120,000 TVU (Tax value unit)
Previous Tax Recoveries						$ 85,921
Top of range [member]
Disclosure Of Income Tax [Line Items]
Percentage of Funds owned By Same Effective Subsidiary					50.00%
Percentage of Marginal Income tax rate on Dividends					15.00%
Bottom of range [member]
Disclosure Of Income Tax [Line Items]
Percentage of Sale Price of Commercial Value					85.00%
Percentage of Sale Price of Non Listed Shares					30.00%
Percentage of Marginal Income tax rate on Dividends					0.00%

ASSETS HELD FOR SALE AND INVE_3

ASSETS HELD FOR SALE AND INVENTORIES (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Assets Held For Sale And Inventories [Abstract]
Inventories	$ 290,605	$ 164,516
Assets held for sale	345,423	212,487
Total inventories and assets held for sale	$ 636,028	$ 377,003

ASSETS HELD FOR SALE AND INVE_4

ASSETS HELD FOR SALE AND INVENTORIES (Details 1) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Assets Held For Sale And Inventories [Line Items]
Lands and buildings	$ 250,543	$ 117,339
Vehicles	41,853	45,741
Machinery	20,527	16,252
Total inventory cost	312,923	179,332
Impairment	(22,318)	(14,816)
Total inventories, net	$ 290,605	$ 164,516

ASSETS HELD FOR SALE AND INVE_5

ASSETS HELD FOR SALE AND INVENTORIES (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017
Assets held for sale	$ 345,423		$ 212,487
Impairment	(8,727)		(1,946)
Non-current assets held for sale [member]
Assets held for sale	345,423		212,487
Non-current assets held for sale [member] | Colombia [Member]
Assets held for sale	32,710		16,740
Non-current assets held for sale [member] | Panama [Member]
Assets held for sale	85,725		16,571
Non-current assets held for sale [member] | EL SALVADOR [Member]
Assets held for sale	1,762		2,586
Non-current assets held for sale [member] | Guatemala [Member]
Assets held for sale	1,487		859
Non-current assets held for sale [member] | Others [Member]
Assets held for sale	223,739		175,731
Real Estate For Residential Purposes [Member] | Non-current assets held for sale [member]
Assets held for sale	92,052		23,854
Cost	95,045		24,820
Impairment	(2,993)		(966)
Real Estate For Residential Purposes [Member] | Non-current assets held for sale [member] | Colombia [Member]
Assets held for sale	29,562		8,346
Cost	30,472		8,431
Impairment	(910)		(85)
Real Estate For Residential Purposes [Member] | Non-current assets held for sale [member] | Panama [Member]
Assets held for sale	59,241		12,257
Cost	61,286		12,859
Impairment	(2,045)		(602)
Real Estate For Residential Purposes [Member] | Non-current assets held for sale [member] | EL SALVADOR [Member]
Assets held for sale	1,762		2,586
Cost	1,800		2,645
Impairment	(38)		(59)
Real Estate For Residential Purposes [Member] | Non-current assets held for sale [member] | Guatemala [Member]
Assets held for sale	1,487		665
Cost	1,487		885
Impairment	0		(220)
Real Estate For Residential Purposes [Member] | Non-current assets held for sale [member] | Others [Member]
Assets held for sale	0		0
Cost	0		0
Impairment	0		0
Machinery [member] | Non-current assets held for sale [member]
Assets held for sale	5,556		11,500
Cost	6,155		12,433
Impairment	(599)		(933)
Machinery [member] | Non-current assets held for sale [member] | Colombia [Member]
Assets held for sale	2,696		8,099
Cost	3,065		8,972
Impairment	(369)		(873)
Machinery [member] | Non-current assets held for sale [member] | Panama [Member]
Assets held for sale	2,860		3,362
Cost	3,090		3,422
Impairment	(230)		(60)
Machinery [member] | Non-current assets held for sale [member] | EL SALVADOR [Member]
Assets held for sale	0		0
Cost	0		0
Impairment	0		0
Machinery [member] | Non-current assets held for sale [member] | Guatemala [Member]
Assets held for sale	0		39
Cost	0		39
Impairment	0		0
Machinery [member] | Non-current assets held for sale [member] | Others [Member]
Assets held for sale	0		0
Cost	0		0
Impairment	0		0
Real Estate For Other Than Residential Purposes [Member] | Non-current assets held for sale [member]
Assets held for sale	24,076		1,402
Cost	24,820		1,449
Impairment	(744)		(47)
Real Estate For Other Than Residential Purposes [Member] | Non-current assets held for sale [member] | Colombia [Member]
Assets held for sale	452		295
Cost	998		295
Impairment	(546)		0
Real Estate For Other Than Residential Purposes [Member] | Non-current assets held for sale [member] | Panama [Member]
Assets held for sale	23,624		952
Cost	23,822		952
Impairment	(198)		0
Real Estate For Other Than Residential Purposes [Member] | Non-current assets held for sale [member] | EL SALVADOR [Member]
Assets held for sale	0		0
Cost	0		0
Impairment	0		0
Real Estate For Other Than Residential Purposes [Member] | Non-current assets held for sale [member] | Guatemala [Member]
Assets held for sale	0		155
Cost	0		178
Impairment	0		(23)
Real Estate For Other Than Residential Purposes [Member] | Non-current assets held for sale [member] | Others [Member]
Assets held for sale	0		0
Cost	0		24
Impairment	0		(24)
Investments held for sale [Member] | Non-current assets held for sale [member]
Assets held for sale	19,128		18,413
Cost	19,128	[1]	18,413	[2]
Impairment	0		0
Investments held for sale [Member] | Non-current assets held for sale [member] | Colombia [Member]
Assets held for sale	0		0
Cost	0	[1]	0	[2]
Impairment	0		0
Investments held for sale [Member] | Non-current assets held for sale [member] | Panama [Member]
Assets held for sale	0		0
Cost	0	[1]	0	[2]
Impairment	0		0
Investments held for sale [Member] | Non-current assets held for sale [member] | EL SALVADOR [Member]
Assets held for sale	0		0
Cost	0	[1]	0	[2]
Impairment	0		0
Investments held for sale [Member] | Non-current assets held for sale [member] | Guatemala [Member]
Assets held for sale	0		0
Cost	0	[1]	0	[2]
Impairment	0		0
Investments held for sale [Member] | Non-current assets held for sale [member] | Others [Member]
Assets held for sale	19,128		18,413
Cost	19,128	[1]	18,413	[2]
Impairment	0		0
Assets related to investments held for sale [Member] | Non-current assets held for sale [member]
Assets held for sale	204,611		157,318
Cost	209,002	[3]	157,318	[4]
Impairment	(4,391)	[5]	0
Assets related to investments held for sale [Member] | Non-current assets held for sale [member] | Colombia [Member]
Assets held for sale	0		0
Cost	0	[3]	0	[4]
Impairment	0	[5]	0
Assets related to investments held for sale [Member] | Non-current assets held for sale [member] | Panama [Member]
Assets held for sale	0		0
Cost	0	[3]	0	[4]
Impairment	0	[5]	0
Assets related to investments held for sale [Member] | Non-current assets held for sale [member] | EL SALVADOR [Member]
Assets held for sale	0		0
Cost	0	[3]	0	[4]
Impairment	0	[5]	0
Assets related to investments held for sale [Member] | Non-current assets held for sale [member] | Guatemala [Member]
Assets held for sale	0		0
Cost	0	[3]	0	[4]
Impairment	0	[5]	0
Assets related to investments held for sale [Member] | Non-current assets held for sale [member] | Others [Member]
Assets held for sale	204,611		157,318
Cost	209,002	[3]	157,318	[4]
Impairment	$ (4,391)	[5]	$ 0
[1]	In December 2017, the management launched the execution of a sale plan for the investments associated with Avefarma S.A.S, Glassfarma Tech S.A.S. and Panamerican Pharmaceutical Holding Inc., for this reason the investments are presented as "non-current assets held for sale". Management is still committed to a plan to sell the aforementioned investments.
[2]	In December 2017, the management launched the execution of a sale plan for the investments associated with Avefarma S.A.S, Glassfarma Tech S.A.S. and Panamerican Pharmaceutical Holding Inc., for this reason the investments are presented as "non-current assets held for sale".
[3]	These assets corresponded to Arrendamiento Operativo CIB S.A.C. and FiduPerú S.A. Sociedad Fiduciaria.
[4]	These assets corresponded to Arrendamiento Operativo CIB S.A.C.; Capital Investments SAFI S.A. and FiduPerú S.A. Sociedad Fiduciaria.
[5]	In September 2018, FiduPerú S.A. returned capital to its shareholders. At the end of the 2018 period, the Administration adjusted the book value of the asset based on the fair value of the company, recognizing an impairment in the Income Statement.

ASSETS HELD FOR SALE AND INVE_6

ASSETS HELD FOR SALE AND INVENTORIES (Details 3) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents		$ 18,730,810	$ 18,165,644	$ 20,460,245	$ 18,805,577
Financial assets investment		17,361,475	16,377,253
Premises and equipment, net		3,368,647	3,127,405	$ 3,115,697
Prepaid expenses		346,012	287,550
Deferred tax		704,801	559,220
Assets held for sale		345,423	212,487
Other assets		3,234,181	2,479,037
Total assets		220,113,618	203,908,211
Liabilities
Borrowings from other financial institutions		16,337,964	13,822,152
Tax liabilities		166,472	161,966
Deferred tax liabilities		2,122,001	1,784,575
Other liabilities		6,768,253	5,796,482
Total liabilities		193,458,393	179,478,661
Assets and liabilities classified as held for sale [member]
Assets
Cash and cash equivalents		12,476	19,072
Financial assets investment		0	2,486
Premises and equipment, net		164,356	109,469
Prepaid expenses		412	101
Tax receivables		7,093	8,028
Deferred tax		1,551	1,103
Assets held for sale		721	4,691
Other assets		22,393	12,368
Total assets	[1]	209,002	157,318
Liabilities
Borrowings from other financial institutions		150,254	90,109
Tax liabilities		1,054	611
Deferred tax liabilities		4,832	4,908
Other liabilities		7,456	7,348
Total liabilities		$ 163,596	$ 102,976
[1]	In September 2018, the management adjusted the book value of FiduPerú S.A. Sociedad Fiduciaria based on the fair value of the company, recognizing an impairment in the Income Statement for COP 4,391.

ASSETS HELD FOR SALE AND INVE_7

ASSETS HELD FOR SALE AND INVENTORIES (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Assets Held For Sale And Inventories [Line Items]
Impairment loss on financial assets	$ 8,727	$ 1,946

OTHER ASSETS (Details)

OTHER ASSETS (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Other Asset [Line Items]
Tax advance		$ 867,120	$ 480,523
Marketable and non-marketable for sale assets		654,207	580,438
Other receivables	[1]	286,583	200,645
Prepaid expenses		346,012	287,550
Assets pledged as collateral		253,546	192,036
Receivables related to abandoned accounts	[2]	172,671	147,228
Interbank Borrowings not classified as cash equivalents		55,690	125,963
Receivable Sales of goods and service		141,098	117,540
Commission receivables		99,185	97,710
Revenue from contracts with customers	[3]	86,759	90,590
Commission for letters of credit		25,399	72,927
Balance in credit card clearning house		61,539	66,788
Operating leases		55,450	38,653
Debtors		22,054	10,510
Taxes Receivable		4,882	7,199
Others		166,125	34,498
Total other assets		3,298,320	2,550,798
Allowance others		(64,139)	(71,761)
Total other assets, net		$ 3,234,181	$ 2,479,037
[1]	As of December 31, 2018, corresponds to reconciling items on correspondent banks and mortgage-backed securities´ interest.
[2]	The item corresponds to receivables related to the application of the Colombian Law 1777 of February 1, 2016, which establishes that entities holding accounts deemed abandoned must transfer the related amounts to a fund constituted and regulated by the Icetex (Governmental entity responsible for promoting high quality education in Colombia).
[3]	See Note 24.3 Fees and commissions.

DEPOSITS FROM CUSTOMERS (Detail

DEPOSITS FROM CUSTOMERS (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Deposits From Customers [Abstract]
Saving accounts	$ 59,635,379	$ 54,255,583
Time deposits	56,853,141	53,961,586
Checking accounts	24,098,073	22,065,647
Other deposits	1,541,878	1,676,399
Total	$ 142,128,471	$ 131,959,215

DEPOSITS FROM CUSTOMERS (Deta_2

DEPOSITS FROM CUSTOMERS (Details 1) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Deposits From Customers [Line Items]
Time deposits	$ 56,853,141	$ 53,961,586
Fair value	57,585,666	54,782,101
Later than three months and not later than six months [member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	9,549,206	7,536,280
Fair value	9,554,429	7,535,719
Later than six months and not later than one year [member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	5,572,051	5,711,157
Fair value	5,577,962	5,718,827
Later Than Twelve Months And Not Later Than Eighteen Months [Member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	7,323,840	8,062,290
Fair value	7,368,860	8,146,366
Later Than Eighteen Months [Member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	34,408,044	32,651,859
Fair value	$ 35,084,415	$ 33,381,189
Bottom of range [member] | Later than three months and not later than six months [member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	0.10%	0.10%
Bottom of range [member] | Later than six months and not later than one year [member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	0.25%	0.20%
Bottom of range [member] | Later Than Twelve Months And Not Later Than Eighteen Months [Member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	0.25%	0.20%
Bottom of range [member] | Later Than Eighteen Months [Member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	0.01%	0.01%
Top of range [member] | Later than three months and not later than six months [member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	6.75%	6.96%
Top of range [member] | Later than six months and not later than one year [member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	7.50%	8.03%
Top of range [member] | Later Than Twelve Months And Not Later Than Eighteen Months [Member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	7.25%	9.03%
Top of range [member] | Later Than Eighteen Months [Member]
Disclosure Of Deposits From Customers [Line Items]
Borrowings, interest rate	13.50%	18.29%

DEPOSITS FROM CUSTOMERS (Deta_3

DEPOSITS FROM CUSTOMERS (Details 2) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Deposits From Customers [Line Items]
Time deposits	$ 56,853,141	$ 53,961,586
Fair value	57,585,666	54,782,101
Less than one year [member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	37,911,658	36,416,439
Fair value	38,216,970	36,701,555
1 to 3 years [member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	12,753,264	10,525,956
Fair value	12,965,241	10,727,828
3 to 5 years [member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	4,559,122	5,367,765
Fair value	4,663,087	5,592,750
More than 5 years [member]
Disclosure Of Deposits From Customers [Line Items]
Time deposits	1,629,097	1,651,426
Fair value	$ 1,740,368	$ 1,759,968

INTERBANK DEPOSITS AND REPURC_3

INTERBANK DEPOSITS AND REPURCHASE AGREEMENTS AND OTHER SIMILAR SECURED BORROWING (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Interbank Deposits
Interbank liabilities	$ 1,374,222	$ 1,084,591
Total interbank	1,374,222	1,084,591
Repurchase agreements and other similar secured borrowing
Short selling operations	136,786	607,536
Temporary transfer of securities	2,178,769	2,628,592
Total Repurchase agreements and other similar secured borrowing	2,315,555	3,236,128
Total money market transactions	$ 3,689,777	$ 4,320,719

INTERBANK DEPOSITS AND REPURC_4

INTERBANK DEPOSITS AND REPURCHASE AGREEMENTS AND OTHER SIMILAR SECURED BORROWING (Details 1) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of interbank deposits and repurchase agreements and other similar secured borrowing [Line Items]
Assets / liabilities gross	$ (1,383,735)	$ (2,355,067)
Amounts offset in the statement of financial position	0	0	[1]
Net balance presented in the statement of financial position	(1,383,735)	(2,355,067)
Financial instruments as collaterals	(931,820)	(881,061)	[1]
Assets / liabilities net	0	0	[1]
Securities sold under repurchase agreements [Member]
Disclosure of interbank deposits and repurchase agreements and other similar secured borrowing [Line Items]
Assets / liabilities gross	(2,315,555)	(3,236,128)
Amounts offset in the statement of financial position	0	0
Net balance presented in the statement of financial position	(2,315,555)	(3,236,128)
Financial instruments as collaterals	2,315,555	3,236,128
Assets / liabilities net	$ 0	$ 0
[1]	The amount includes those presented as cash and cash equivalents and those presented as other assets.

INTERBANK DEPOSITS AND REPURC_5

INTERBANK DEPOSITS AND REPURCHASE AGREEMENTS AND OTHER SIMILAR SECURED BORROWING (Details Textual)	12 Months Ended
	Dec. 31, 2018
Disclosure of interbank deposits and repurchase agreements and other similar secured borrowing [Abstract]
Borrowings, maturity	30

BORROWINGS FROM OTHER FINANCI_3

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS (Details) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks	[1]	$ 11,217,308	$ 7,958,450
Obligations granted by domestic banks		5,120,656	5,863,702
Total		$ 16,337,964	$ 13,822,152
[1]	The Bank has recognized a financial liability with BAM Financial Corporation (BFC) amounting to USD 259.4 million as of December 31, 2018 and USD 243.2 million as of December 31, 2017, due to its obligation to pay cash in future to purchase the non-controlling shares of Grupo Agromercantil Holding pursuant to an outstanding put option expiring in 2024. The Bank will reclassify the liability to equity if the put expires unexercised.

BORROWINGS FROM OTHER FINANCI_4

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS (Details 1) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 5,120,656	$ 5,863,702
Financiera de desarrollo territorial (Findeter)
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 2,591,423	$ 2,587,598
Financiera de desarrollo territorial (Findeter) | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	10.19%	11.30%
Financiera de desarrollo territorial (Findeter) | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	0.24%	1.05%
Banco de comercio exterior de Colombia (Bancoldex)
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 1,205,958	$ 1,528,435
Banco de comercio exterior de Colombia (Bancoldex) | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	15.46%	10.86%
Banco de comercio exterior de Colombia (Bancoldex) | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	2.17%	1.76%
Fondo para el financiamiento del sector agropecuario (Finagro)
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 634,048	$ 728,558
Fondo para el financiamiento del sector agropecuario (Finagro) | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	14.54%	14.90%
Fondo para el financiamiento del sector agropecuario (Finagro) | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	0.85%	1.05%
Other private financial entities [Member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 689,227	$ 1,019,111
Other private financial entities [Member] | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	7.92%	8.89%
Other private financial entities [Member] | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate	5.82%	0.07%

BORROWINGS FROM OTHER FINANCI_5

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS (Details 2) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 5,120,656	$ 5,863,702
No more than twelve months after the reporting period [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	226,397	575,338
More than twelve months after the reporting period [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by domestic banks	$ 4,894,259	$ 5,288,364

BORROWINGS FROM OTHER FINANCI_6

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS (Details 3) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks	[1]	$ 11,217,308	$ 7,958,450
Financing with correspondent banks [Member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks		$ 10,140,356	$ 7,341,713
Financing with correspondent banks [Member] | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		5.66%	5.66%
Financing with correspondent banks [Member] | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		2.81%	1.48%
Corporacion Andina de Fomento CAF [Member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks		$ 529,464	$ 311,730
Corporacion Andina de Fomento CAF [Member] | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		5.01%	3.84%
Corporacion Andina de Fomento CAF [Member] | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		2.93%	1.85%
Banco Latinoamericano de Comercio Exterior Bladex [Member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks		$ 473,549	$ 269,946
Banco Latinoamericano de Comercio Exterior Bladex [Member] | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		4.89%	4.10%
Banco Latinoamericano de Comercio Exterior Bladex [Member] | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		3.15%	1.90%
Banco Interamericano de Desarrollo BID [Member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks		$ 73,939	$ 35,061
Banco Interamericano de Desarrollo BID [Member] | Top of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		5.64%	3.96%
Banco Interamericano de Desarrollo BID [Member] | Bottom of range [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Borrowings, interest rate		4.32%	3.96%
[1]	The Bank has recognized a financial liability with BAM Financial Corporation (BFC) amounting to USD 259.4 million as of December 31, 2018 and USD 243.2 million as of December 31, 2017, due to its obligation to pay cash in future to purchase the non-controlling shares of Grupo Agromercantil Holding pursuant to an outstanding put option expiring in 2024. The Bank will reclassify the liability to equity if the put expires unexercised.

BORROWINGS FROM OTHER FINANCI_7

BORROWINGS FROM OTHER FINANCIAL INSTITUTIONS (Details 4) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks	[1]	$ 11,217,308	$ 7,958,450
No more than twelve months after the reporting period [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks		9,743,905	7,037,043
More than twelve months after the reporting period [member]
Disclosure of Borrowings from other financial institutions [Line Items]
Obligations granted by foreign banks		$ 1,473,403	$ 921,407
[1]	The Bank has recognized a financial liability with BAM Financial Corporation (BFC) amounting to USD 259.4 million as of December 31, 2018 and USD 243.2 million as of December 31, 2017, due to its obligation to pay cash in future to purchase the non-controlling shares of Grupo Agromercantil Holding pursuant to an outstanding put option expiring in 2024. The Bank will reclassify the liability to equity if the put expires unexercised.

DEBT SECURITIES IN ISSUE (Detai

DEBT SECURITIES IN ISSUE (Details) $ in Millions, $ in Millions		Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)
Disclosure of debt securities in issue [Line Items]
Debt instruments issued		$ 20,287,233		$ 19,648,714
Bancolombia S.A. | Country of domicile [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]	4,533,392		5,162,515
Debt instruments issued		$ 4,607,153		$ 5,247,501
Bancolombia S.A. | Foreign countries [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]		$ 3,237,466		$ 3,242,405
Debt instruments issued			10,452,432		9,532,927
Banco Agrícola S.A. | Foreign countries [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]		547,000		547,000
Debt instruments issued			1,774,852		1,622,238
Bancolombia Panama S.A. | Foreign countries [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]		139,280		260,310
Debt instruments issued			457,495		784,567
Grupo Agromercantil Holding S.A. | Foreign countries [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]		300,939		302,264
Debt instruments issued			986,476		910,270
Banismo S.A. y filiales | Foreign countries [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]		606,635		519,300
Debt instruments issued			1,980,824		$ 1,551,211
Bancolombia Puerto Rico International Inc | Foreign countries [member]
Disclosure of debt securities in issue [Line Items]
Notional amount	[1]		8,499
Debt instruments issued			$ 28,001
Bottom of range [member] | Bancolombia S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate	[2]	2.60%	2.60%	5.59%	5.59%
Bottom of range [member] | Bancolombia S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		2.60%	2.60%	1.90%	1.90%
Bottom of range [member] | Banco Agrícola S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		5.27%	5.27%	5.36%	5.36%
Bottom of range [member] | Bancolombia Panama S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		2.60%	2.60%	1.90%	1.90%
Bottom of range [member] | Grupo Agromercantil Holding S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		0.25%	0.25%	0.25%	0.25%
Bottom of range [member] | Banismo S.A. y filiales
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		2.65%	2.65%	2.65%	2.65%
Bottom of range [member] | Bancolombia Puerto Rico International Inc
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		2.70%	2.70%
Top of range [member] | Bancolombia S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate	[2]	10.89%	10.89%	7.00%	7.00%
Top of range [member] | Bancolombia S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		6.22%	6.22%	6.31%	6.31%
Top of range [member] | Banco Agrícola S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		7.17%	7.17%	7.99%	7.99%
Top of range [member] | Bancolombia Panama S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		3.50%	3.50%	2.90%	2.90%
Top of range [member] | Grupo Agromercantil Holding S.A.
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		7.25%	7.25%	7.25%	7.25%
Top of range [member] | Banismo S.A. y filiales
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		5.00%	5.00%	3.65%	3.65%
Top of range [member] | Bancolombia Puerto Rico International Inc
Disclosure of debt securities in issue [Line Items]
Borrowings, interest rate		3.00%	3.00%
[1]	Face value is in US dollar for foreign currency bonds.
[2]	Consumer price index.

DEBT SECURITIES IN ISSUE (Det_2

DEBT SECURITIES IN ISSUE (Details 1) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	$ 20,287,233	$ 19,648,714
Subordinated bonds [member] | Local Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	1,425,034	2,573,987
Subordinated bonds [member] | Foreign Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	6,790,506	6,156,094
Ordinary bonds [member] | Local Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	3,182,119	2,673,514
Ordinary bonds [member] | Foreign Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	8,889,574	8,245,119
Less than a year [member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	652,579	535,020
Less than a year [member] | Subordinated bonds [member] | Local Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
Less than a year [member] | Subordinated bonds [member] | Foreign Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
Less than a year [member] | Ordinary bonds [member] | Local Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
Less than a year [member] | Ordinary bonds [member] | Foreign Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	652,579	535,020
1 to 3 years [member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	339,419	758,879
1 to 3 years [member] | Subordinated bonds [member] | Local Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
1 to 3 years [member] | Subordinated bonds [member] | Foreign Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
1 to 3 years [member] | Ordinary bonds [member] | Local Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
1 to 3 years [member] | Ordinary bonds [member] | Foreign Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	339,419	758,879
3 to 5 years [member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	314,534	209,320
3 to 5 years [member] | Subordinated bonds [member] | Local Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	163,778
3 to 5 years [member] | Subordinated bonds [member] | Foreign Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	0	0
3 to 5 years [member] | Ordinary bonds [member] | Local Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	154,813	802
3 to 5 years [member] | Ordinary bonds [member] | Foreign Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	159,721	44,740
more than 5 years [member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	18,980,701	18,145,495
more than 5 years [member] | Subordinated bonds [member] | Local Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	1,425,034	2,410,209
more than 5 years [member] | Subordinated bonds [member] | Foreign Currency One [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	6,790,506	6,156,094
more than 5 years [member] | Ordinary bonds [member] | Local Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	3,027,306	2,672,712
more than 5 years [member] | Ordinary bonds [member] | Foreign Currency Two [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	$ 7,737,855	$ 6,906,480

DEBT SECURITIES IN ISSUE (Det_3

DEBT SECURITIES IN ISSUE (Details 2) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	$ 20,287,233	$ 19,648,714
Held to maturity Security [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	20,287,233	19,648,714
No more than twelve months after the reporting period [member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	652,579	535,020
No more than twelve months after the reporting period [member] | Held to maturity Security [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	2,854,161	2,352,801
More than twelve months after the reporting period [member] | Held to maturity Security [Member]
Disclosure of debt securities in issue [Line Items]
Debt instruments issued	$ 17,433,072	$ 17,295,913

DEBT SECURITIES IN ISSUE (Det_4

DEBT SECURITIES IN ISSUE (Details Textual) $ in Millions, $ in Millions

Sep. 12, 2017USD ($)

Sep. 04, 2012USD ($)

Jul. 26, 2010USD ($)

Dec. 31, 2018COP ($)

Dec. 31, 2018USD ($)

Dec. 31, 2017COP ($)

Dec. 31, 2016COP ($)

Jul. 18, 2018COP ($)

Jul. 18, 2018USD ($)

Oct. 18, 2017USD ($)

Disclosure of debt securities in issue [Line Items]

Borrowings, maturity

30

30

Proceeds from issue of bonds, notes and debentures

[1]

$ 1,150,485

$ 3,013,426

$ 3,039,485

Fee and commission expense

$ 1,213,056

$ 1,075,115

[2]

$ 968,970

[3]

Ordinary bonds [Member]

Disclosure of debt securities in issue [Line Items]

Bonds issued

$ 300,000

Banistmo bonds [Member]

Disclosure of debt securities in issue [Line Items]

Bonds issued

$ 500,000

Borrowings, maturity

2022

Proportion of issue price

99.778%

Rate of return

3.73%

Borrowings, interest rate

3.65%

Notional amount

$ 519,842

Subordinated note three [Member]

Disclosure of debt securities in issue [Line Items]

Borrowings, interest rate

4.875%

Notes and debentures issued

$ 750,000

Subordinated note two [Member]

Disclosure of debt securities in issue [Line Items]

Proceeds from issue of bonds, notes and debentures

$ 321,152

Subordinated note one [Member]

Disclosure of debt securities in issue [Line Items]

Proceeds from issue of bonds, notes and debentures

$ 360,912

Subordinated notes [Member]

Disclosure of debt securities in issue [Line Items]

Fee and commission expense

$ 4,303

Finance costs

$ 11,233

[1]

The issuance costs paid by Bancolombia S.A. amounted to USD 15,535. For further information see Note 17. Debt instruments in issue.

[2]

Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

[3]

Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

EMPLOYEE BENEFIT PLANS (Details

EMPLOYEE BENEFIT PLANS (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Abstract]
Defined benefit pension plan	$ 128,246	$ 131,589
Severance obligation	30,732	38,041
Retirement Pension Premium Plan and Senior Management Pension Plan Premium	120,966	119,526
Other long term benefits	439,321	408,245
Post-employment and long-term benefit plans	$ 719,265	$ 697,401

EMPLOYEE BENEFIT PLANS (Detai_2

EMPLOYEE BENEFIT PLANS (Details 1) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Abstract]
Current severance obligation	[1]	$ 113,654	$ 106,334
Other bonuses and short-term benefits		351,697	336,285
Other employment benefit plans		$ 465,351	$ 442,619
[1]	See severance obligation

EMPLOYEE BENEFIT PLANS (Detai_3

EMPLOYEE BENEFIT PLANS (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of employee benefit plans [Line Items]
Actuarial (gain)/loss - financial assumptions			$ 14,482
Domestic Defined Benefit Plan [Member]
Disclosure of employee benefit plans [Line Items]
Present value of the obligation as of January 1	$ 125,480	$ 123,282
Interest cost	7,547	8,117
Actuarial (gain)/loss - experience	3,371	3,418
Benefits paid or payable	(11,795)	(11,553)
Actuarial (gain)/loss - financial assumptions	(2,220)	2,216
Defined obligation, unfunded as of December 31	122,383	125,480	123,282
Foreign defined benefit plans [member]
Disclosure of employee benefit plans [Line Items]
Present value of the obligation as of January 1	6,109	6,649
Interest cost	177	198
Actuarial (gain)/loss - experience	(536)	68
Actuarial (gain)/loss - financial assumptions	46	61
Benefits paid from plan assets	(405)	(825)
Foreign currency translation effect	472	(42)
Defined obligation, unfunded as of December 31	$ 5,863	$ 6,109	$ 6,649

EMPLOYEE BENEFIT PLANS (Detai_4

EMPLOYEE BENEFIT PLANS (Details 3) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Current severance regimen	[1]	$ 113,654	$ 106,334
Severance regimen [Member]
Disclosure of employee benefit plans [Line Items]
Present value of the obligation as of January 1		38,041	51,289
Current service cost		1,598	2,562
Interest cost		2,333	3,419
Benefits paid		(11,586)	(11,298)
Net actuarial (gain) / loss due to assumption changes and plan experience		346	(7,931)
Defined obligation, unfunded as of December 31		30,732	38,041
Current severance regimen		113,654	106,334
Total		$ 144,386	$ 144,375
[1]	See severance obligation

EMPLOYEE BENEFIT PLANS (Detai_5

EMPLOYEE BENEFIT PLANS (Details 4) - Pension plan premium [Member] - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Present value of the obligation as of January 1		$ 119,526	$ 105,158
Current service cost		8,294	7,294
Interest cost		7,391	6,881
Benefits paid		(6,590)	(1,224)
Net actuarial (gain) / loss due to assumption changes and plan experience	[1]	(11,272)	1,195
Foreign currency translation effect		317	(15)
Defined obligation, unfunded as of December 31		120,966	119,526
Transportempo S.A.S. [Member]
Disclosure of employee benefit plans [Line Items]
First time application effect of IAS 19 to new defined benefit obligationof Transportempo at December 31, 2017	[2]	0	237
First time application effect of IAS 19 to new defined benefit obligation of Banistmo at December 31, 2018 (2)	[2]	0	237
First time application effect of IAS 19 to new defined benefit obligation of Banagrícola at December 31, 2018 (3)	[2]	0	237
Banistmo S.A. y Filiales [Member]
Disclosure of employee benefit plans [Line Items]
First time application effect of IAS 19 to new defined benefit obligationof Transportempo at December 31, 2017	[3]	2,479	0
First time application effect of IAS 19 to new defined benefit obligation of Banistmo at December 31, 2018 (2)	[3]	2,479	0
First time application effect of IAS 19 to new defined benefit obligation of Banagrícola at December 31, 2018 (3)	[3]	2,479	0
Banagricola S.A. [Member]
Disclosure of employee benefit plans [Line Items]
First time application effect of IAS 19 to new defined benefit obligationof Transportempo at December 31, 2017	[4]	821	0
First time application effect of IAS 19 to new defined benefit obligation of Banistmo at December 31, 2018 (2)	[4]	821	0
First time application effect of IAS 19 to new defined benefit obligation of Banagrícola at December 31, 2018 (3)	[4]	$ 821	$ 0
[1]	The increase in actuarial gains from experience adjustment is mainly due to a greater than expected reduction in the number of the Bank’s participants in the pension premium plan during the yaer ended as of December 31, 2018
[2]	Pursuant to a private agreement reached between Transportempo and its employees, the Bank’s subsidiary has decided to recognize a new employee benefit plan based on the employees’ seniority and their current salary at the moment when the service is vested.
[3]	Banistmo S.A has decided to recognize a new employee benefit plan for its senior management executives based on the number of years of service to the organization.
[4]	Banagrícola S.A has decided to recognize a new employee benefit plan for its senior management executives based on the number of years of service to the organization.

EMPLOYEE BENEFIT PLANS (Detai_6

EMPLOYEE BENEFIT PLANS (Details 5) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Other long term benefits [Member]
Disclosure of employee benefit plans [Line Items]
Present value of the obligation as of January 1		$ 408,245	$ 364,424
Current service cost		41,512	37,433
Interest cost		26,152	26,329
Benefits paid		(45,104)	(38,671)
Unfunded benefit obligation assumed for Grupo Agromercantil at December 31, 2017	[1]	0	340
Loss due to assumption changes and plan experience		4,360	16,893
Foreign currency translation effect		4,156	883
Defined obligation, unfunded as of December 31		439,321	408,245
CIBPension Plan Premium [Member] | Foreign Defined Benefit Plan [Member]
Disclosure of employee benefit plans [Line Items]
First time application effect of IAS 19 to new defined benefit obligationof Transportempo at December 31, 2017	[2]	$ 0	$ 614
[1]	Former employees have been incorporated again in the Company’s payroll due to the private agreement reached between Comamesa (a Guatemalan subsidiary of Grupo Agromercantil and Serviva (security supplier).
[2]	Pursuant to a private agreement reached between Renting and its employees, the Bank’s subsidiary has decided to recognize a new employee benefit plan based on the employees’ seniority and their current salary at the moment when the service is vested.

EMPLOYEE BENEFIT PLANS (Detai_7

EMPLOYEE BENEFIT PLANS (Details 6) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Abstract]
Retirement Pension Premium Plan	$ 32,252	$ 0
Post-employment and long-term benefit plans	719,265	697,401
Fair value of assets as of January 1	0	0
Employer contributions	32,252	0
Fair value assets at the end of the year	$ 32,252	$ 0

EMPLOYEE BENEFIT PLANS (Detai_8

EMPLOYEE BENEFIT PLANS (Details 7) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of employee benefit plans [Line Items]
Employee pension plan	$ 32,252	$ 0	$ 0
Total	32,252	0	$ 0
Employee pension plan [Member]
Disclosure of employee benefit plans [Line Items]
Employee pension plan	4,884	4,765
Total	$ 4,884	$ 4,765

EMPLOYEE BENEFIT PLANS (Detai_9

EMPLOYEE BENEFIT PLANS (Details 8) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Fair value of assets as of January 1	$ 0	$ 0
Fair value assets at the end of the year	32,252	0
Plan assets [member]
Disclosure of employee benefit plans [Line Items]
Fair value of assets as of January 1	4,765	5,565
Interest income on plan assets	161	123
Return on plan assets greater/(less) than discount rate	(33)	(58)
Benefits paid	(405)	(825)
Foreign currency translation effect	396	(40)
Fair value assets at the end of the year	$ 4,884	$ 4,765

EMPLOYEE BENEFIT PLANS (Deta_10

EMPLOYEE BENEFIT PLANS (Details 9) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Post-employment benefit expense, defined contribution plans	$ 240,121	$ 226,223
Pension [Member]
Disclosure of employee benefit plans [Line Items]
Post-employment benefit expense, defined contribution plans	182,991	171,713
Current severance regimen [Member]
Disclosure of employee benefit plans [Line Items]
Post-employment benefit expense, defined contribution plans	$ 57,130	$ 54,510

EMPLOYEE BENEFIT PLANS (Deta_11

EMPLOYEE BENEFIT PLANS (Details 10)	Dec. 31, 2018	Dec. 31, 2017
Colombia [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate	6.90%	6.60%
Rate of wage increase	5.70%	7.00%
Projected inflation	3.40%	4.00%
Bancolombia Panama [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate	4.00%	3.00%
Rate of wage increase	2.00%	3.00%
Projected inflation	1.00%	2.00%
Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate	4.00%	3.00%
Rate of wage increase	2.30%	2.10%
Projected inflation	3.00%	3.00%
EL SALVADOR [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate	4.10%	3.60%
Rate of wage increase	2.50%	2.50%
Projected inflation	1.50%	1.50%
Guatemala [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate	8.20%	8.20%
Rate of wage increase	5.00%	5.00%
Projected inflation	4.00%	4.00%

EMPLOYEE BENEFIT PLANS (Deta_12

EMPLOYEE BENEFIT PLANS (Details 11) $ in Millions	Dec. 31, 2018COP ($)
Pension Benefits [Member] | 2019
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	$ 12,741
Pension Benefits [Member] | 2020
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	12,820
Pension Benefits [Member] | 2021
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	12,819
Pension Benefits [Member] | 2022
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	12,723
Pension Benefits [Member] | 2023
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	12,556
Pension Benefits [Member] | 2024 to 2028
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	58,018
Other Benefits [Member] | 2019
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	58,498
Other Benefits [Member] | 2020
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	52,205
Other Benefits [Member] | 2021
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	60,941
Other Benefits [Member] | 2022
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	67,609
Other Benefits [Member] | 2023
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	65,015
Other Benefits [Member] | 2024 to 2028
Disclosure of employee benefit plans [Line Items]
Actuarial present value of promised retirement benefits	$ 319,002

EMPLOYEE BENEFIT PLANS (Deta_13

EMPLOYEE BENEFIT PLANS (Details 12) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Discount rate [Member] | Pension plans [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Increase	(4,342)
Discount rate [Member] | Pension plans [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 4,649
Discount rate [Member] | Pension plans [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Discount rate [Member] | Pension plans [Member] | Bancolombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	7.40%
Discount rate [Member] | Pension plans [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.40%
Salary Level [Member] | Pension plans [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Increase	$ 5,065
Salary Level [Member] | Pension plans [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ (4,763)
Salary Level [Member] | Pension plans [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Salary Level [Member] | Pension plans [Member] | Bancolombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	4.00%
Salary Level [Member] | Pension plans [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	3.00%
Mortality Table [Member] | Pension plans [Member]
Disclosure of employee benefit plans [Line Items]
Mortality Table (Increase/Decrease)	One year increase in life expectancy
Mortality Table [Member] | Pension plans [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Increase	$ 4,966
Mortality Table [Member] | Pension plans [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Mortality Table (Increase/Decrease)	RV-08 ("Rentistas Validos")

EMPLOYEE BENEFIT PLANS (Deta_14

EMPLOYEE BENEFIT PLANS (Details 13) $ in Millions	Dec. 31, 2018COP ($)
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Retirement Pension Premium Plan [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Increase	5,370
Effect on DBO Decrease	$ (4,922)
Retirement Pension Premium Plan [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.50%
Retirement Pension Premium Plan [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	5.50%
Discount rate [Member] | Retirement Pension Premium Plan [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (4,815)
Effect on DBO Decrease	$ 5,318
Discount rate [Member] | Retirement Pension Premium Plan [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	7.40%
Discount rate [Member] | Retirement Pension Premium Plan [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.40%
Salary Level [Member] | Retirement Pension Premium Plan [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%

EMPLOYEE BENEFIT PLANS (Deta_15

EMPLOYEE BENEFIT PLANS (Details 14) $ in Millions	Dec. 31, 2018COP ($)
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Discount rate [Member] | Severance obligation [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (755)
Effect on DBO Decrease	$ 787
Discount rate [Member] | Severance obligation [Member] | Bancolombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	7.40%
Discount rate [Member] | Severance obligation [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.40%
Salary Level [Member] | Severance obligation [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 1,785
Effect on DBO Decrease	$ (1,734)
Salary Level [Member] | Severance obligation [Member] | Bancolombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	6.50%
Salary Level [Member] | Severance obligation [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	5.50%

EMPLOYEE BENEFIT PLANS (Deta_16

EMPLOYEE BENEFIT PLANS (Details 15) $ in Millions	Dec. 31, 2018COP ($)
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Increase [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	95
Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 91
Discount rate [Member] | Senior Management Pension Premium Plan [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (913)
Effect on DBO Decrease	$ 959
Discount rate [Member] | Senior Management Pension Premium Plan [Member] | Bancolombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	7.40%
Discount rate [Member] | Senior Management Pension Premium Plan [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.40%
Salary Level [Member] | Senior Management Pension Premium Plan [Member] | Bancolombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 956
Effect on DBO Decrease	$ (919)
Salary Level [Member] | Senior Management Pension Premium Plan [Member] | Bancolombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	6.50%
Salary Level [Member] | Senior Management Pension Premium Plan [Member] | Bancolombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	5.50%

EMPLOYEE BENEFIT PLANS (Deta_17

EMPLOYEE BENEFIT PLANS (Details 16) $ in Millions	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Increase Level [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	95
Decrease Level [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 91
Actuarial assumption of discount rates [member] | Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%	0.50%
Percentage of Decrease	0.50%	0.50%
Effect on DBO Increase	$ 26	$ 26
Effect on DBO Decrease		$ 27
Actuarial assumption of discount rates [member] | Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member] | Increase Level [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	4.60%	4.60%
Actuarial assumption of discount rates [member] | Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member] | Decrease Level [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	3.60%	3.60%
Actuarial assumption of expected rates of salary increases [member] | Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%	0.50%
Percentage of Decrease	0.50%	0.50%
Effect on DBO Increase	$ 27	$ 27
Effect on DBO Decrease	$ 26
Actuarial assumption of expected rates of salary increases [member] | Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member] | Increase Level [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	3.00%	3.00%
Actuarial assumption of expected rates of salary increases [member] | Senior Management Pension Plan Premium [Member] | Banagricola S.A. [Member] | Decrease Level [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	2.00%	2.00%

EMPLOYEE BENEFIT PLANS (Deta_18

EMPLOYEE BENEFIT PLANS (Details 17) $ in Millions	Dec. 31, 2018COP ($)
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Increase Level [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	95
Decrease Level [Member]
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 91
Actuarial assumption of discount rates [member] | Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 90
Effect on DBO Decrease	$ 95
Actuarial assumption of discount rates [member] | Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member] | Increase Level [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	4.50%
Effect on DBO Increase	$ 90
Actuarial assumption of discount rates [member] | Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member] | Decrease Level [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	2.50%
Actuarial assumption of expected rates of salary increases [member] | Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 94
Effect on DBO Decrease	$ 91
Actuarial assumption of expected rates of salary increases [member] | Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member] | Increase Level [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	3.50%
Actuarial assumption of expected rates of salary increases [member] | Senior Management Pension Plan Premium [Member] | Banistmo S.A. [Member] | Decrease Level [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	3.50%
Effect on DBO Increase	$ 94

EMPLOYEE BENEFIT PLANS (Deta_19

EMPLOYEE BENEFIT PLANS (Details 18) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	4.00%	3.00%
Discount rate [Member] | Pension plans [Member] | Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (261)
Effect on DBO Decrease	$ 283
Discount rate [Member] | Pension plans [Member] | Banistmo [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	4.50%
Discount rate [Member] | Pension plans [Member] | Banistmo [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	3.50%
Mortality Table [Member] | Pension plans [Member] | Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Mortality Table Value	RP-2000
Mortality Table (Increase/Decrease)	One year increase in life expectancy
Effect on DBO Increase	$ 182

EMPLOYEE BENEFIT PLANS (Deta_20

EMPLOYEE BENEFIT PLANS (Details 19) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Colombia [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.90%	6.60%
Salary rate Value	5.70%	7.00%
Discount rate [Member] | Other long term benefits [Member] | Colombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (11,938)
Effect on DBO Decrease	$ 12,762
Discount rate [Member] | Other long term benefits [Member] | Colombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	7.40%
Discount rate [Member] | Other long term benefits [Member] | Colombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	6.40%
Salary Level [Member] | Other long term benefits [Member] | Colombia [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 12,800
Effect on DBO Decrease	$ (12,084)
Salary Level [Member] | Other long term benefits [Member] | Colombia [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	6.50%
Salary Level [Member] | Other long term benefits [Member] | Colombia [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	5.50%

EMPLOYEE BENEFIT PLANS (Deta_21

EMPLOYEE BENEFIT PLANS (Details 20) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
EL SALVADOR [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	4.10%	3.60%
Salary rate Value	2.50%	2.50%
Discount rate [Member] | Other long term benefits [Member] | EL SALVADOR [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (656)
Effect on DBO Decrease	$ 712
Discount rate [Member] | Other long term benefits [Member] | EL SALVADOR [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	3.60%
Discount rate [Member] | Other long term benefits [Member] | EL SALVADOR [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	4.60%
Salary Level [Member] | Other long term benefits [Member] | EL SALVADOR [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 112
Effect on DBO Decrease	$ (145)
Salary Level [Member] | Other long term benefits [Member] | EL SALVADOR [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	2.00%
Salary Level [Member] | Other long term benefits [Member] | EL SALVADOR [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	3.00%

EMPLOYEE BENEFIT PLANS (Deta_22

EMPLOYEE BENEFIT PLANS (Details 21) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of employee benefit plans [Line Items]
Effect on DBO Decrease	$ 27
Guatemala [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	8.20%	8.20%
Salary rate Value	5.00%	5.00%
Discount rate [Member] | Other long term benefits [Member] | Guatemala [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ (24,380)
Effect on DBO Decrease	$ 29,625
Discount rate [Member] | Other long term benefits [Member] | Guatemala [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	8.70%
Discount rate [Member] | Other long term benefits [Member] | Guatemala [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Discount rate Value	7.70%
Salary Level [Member] | Other long term benefits [Member] | Guatemala [Member]
Disclosure of employee benefit plans [Line Items]
Percentage of Increase	0.50%
Percentage of Decrease	0.50%
Effect on DBO Increase	$ 28,711
Effect on DBO Decrease	$ (25,119)
Salary Level [Member] | Other long term benefits [Member] | Guatemala [Member] | Increase [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	5.50%
Salary Level [Member] | Other long term benefits [Member] | Guatemala [Member] | Decrease [Member]
Disclosure of employee benefit plans [Line Items]
Salary rate Value	4.50%
Mortality Table [Member] | Other long term benefits [Member] | Guatemala [Member]
Disclosure of employee benefit plans [Line Items]
Mortality Table Value	RP-2000
Mortality Table (Increase/Decrease)	One year increase inlife expectancy
Effect on DBO Increase	$ 27,661

EMPLOYEE BENEFIT PLANS (Deta_23

EMPLOYEE BENEFIT PLANS (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Dec. 31, 2017COP ($)	Dec. 31, 2016COP ($)
Disclosure of employee benefit plans [Line Items]
Current service cost and interest cost			$ 165,577
Actuarial gains (losses) arising from changes in demographic assumptions, net defined benefit liability (asset)			$ 14,482
Short-term employee benefits accruals	$ 351,697	$ 336,285
Description of plan amendments, curtailments and settlements	As of December 2018, the Bank established an asset plan to secure the benefits promised in the Senior Management Pension Plan Premium. The contributions made to the assets plan managed by the Fondo de Pensiones Protección S.A., will be invested 100% in the accumulation stage in the Balanced Growth portfolio, which will remain in the announced portfolio until 5 years before the pension age. (Currently, 57 years old for women and 62 years old for men). At that moment, 100% of the contributions will be transferred to the Conservative Balanced portfolio.
Grupo Agromercantil Holding [Member] | Employees Services Above Sixty years age [Member]
Disclosure of employee benefit plans [Line Items]
Description of retirement benefits promised to participants	if they are 70 years old and have 30 years of service, or if they are 65 years old and have 40 years of service​​​​​​​.
Percentage of Monthly Nominal Wage in Retirement Pension Plan	50.00%
Grupo Agromercantil Holding [Member] | Employees Services Above forty years age [Member]
Disclosure of employee benefit plans [Line Items]
Description of retirement benefits promised to participants	if they are 70 years old and have 40 years of service, or they are 65 years old and have 45 years of service.
Percentage of Monthly Nominal Wage in Retirement Pension Plan	70.00%
Bottom of range [member]
Disclosure of employee benefit plans [Line Items]
Actuarial assumption of mortality rates (in years)	32
Top of range [member]
Disclosure of employee benefit plans [Line Items]
Actuarial assumption of mortality rates (in years)	75
Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Number of participants of retirement benefit plan receiving benefits	60	62
Severance obligation [Member]
Disclosure of employee benefit plans [Line Items]
Number of participants of retirement benefit plan receiving benefits	453	572
Retirement and senior management pension plan [Member] | EL SALVADOR [Member]
Disclosure of employee benefit plans [Line Items]
Number of participants of retirement benefit plan receiving benefits	2,837	2,940
Participants receiving benefits [Member] | Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Number of participants of retirement benefit plan receiving benefits	30	31
Employees of Banco Agricola and its subsidiaries [Member] | Retirement and senior management pension plan [Member] | Banistmo [Member]
Disclosure of employee benefit plans [Line Items]
Number of participants of retirement benefit plan receiving benefits	1

OTHER LIABILITIES (Details)

OTHER LIABILITIES (Details) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Other Liabilities Explanatory [Abstract]
Payables		$ 1,638,010	$ 1,838,806
Suppliers		1,386,809	1,254,484
Advances	[1]	1,043,611	393,007
Collection services		884,805	377,288
Security contributions		341,872	356,498
Employee benefits and bonuses	[1]	351,697	336,285
Salaries and other labor obligations		265,337	245,369
Deferred interests		44,598	84,824
Advances received in leasing operations and loans		133,377	171,421
Liabilities from contracts with customers		75,845	118,857
Provisions	[2]	63,474	84,294
Dividends	[3]	267,468	16,182
Other	[4]	271,350	519,167
Total		$ 6,768,253	$ 5,796,482
[1]	For the year 2018 and 2017 advances includes the amount received by the Bank in balances related to insurance operations amounting to COP 67,136 and COP 54,967, respectively, balances held by court order amounting to COP 62,861 and COP 50,152, respectively, gain on derivatives first day valuation amounting to COP 55,573 and COP 39,706, respectively, excess cash amounting to COP 5,161 and COP 9,012, respectively and balances of credit cards charges pending to be applied amounting to COP 7,214 and COP 10,116. Additionally, for the year 2018, the line includes guaranteed deposits for capital market transactions in foreign currency for COP 459,966.
[2]	See Note 20 "Provisions and contingent’s liabilities".
[3]	The increase is due to the last installement payment effective for the dividends approved by the annual shareholders’ meeting that took place in 2018.
[4]	For further information see Note 11 “Income tax”

OTHER LIABILITIES (Details Text

OTHER LIABILITIES (Details Textual) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Other Liabilities Explanatory [Line Items]
Gain on derivatives first day valuation	$ 55,573	$ 39,706
Balances related to insurance operations	67,136	54,967
Balances held by court order	62,861	50,152
Bank overdrafts	5,161	9,012
Current accrued expenses and other current liabilities	7,214	$ 10,116
Balance Related To Foreign Currency Transactions	$ 459,966

PROVISIONS AND CONTINGENT LIA_3

PROVISIONS AND CONTINGENT LIABILITIES (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		$ 183,794		$ 208,561
Additions recognized in the year		61,942		106,435
Provisions used during the period		(6,494)		(10,623)
Provisions reversed during the period		(65,971)		(120,246)
Foreign currency translation adjustment		6,312		(409)
Effect of discounted cash flows		239		76
Final balance at the end of the period		168,033		183,794
Effect Of Adoption Of Ifrs 9		(11,789)
Effect of transition to IFRSs [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		172,005
Final balance at the end of the period				172,005
Legal proceedings provision [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		30,412		29,135
Additions recognized in the year		22,281		23,396
Provisions used during the period		(6,489)		(10,623)
Provisions reversed during the period		(10,177)		(11,504)
Foreign currency translation adjustment		606		(90)
Effect of discounted cash flows		239		98
Final balance at the end of the period		36,872		30,412
Effect Of Adoption Of Ifrs 9		0
Legal proceedings provision [member] | Effect of transition to IFRSs [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		30,412
Final balance at the end of the period				30,412
Administrative proceedings provision [Member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		1,592		1,312
Additions recognized in the year		7,272		302
Provisions used during the period		0		0
Provisions reversed during the period		(8,395)		0
Foreign currency translation adjustment		0		0
Effect of discounted cash flows		0		(22)
Final balance at the end of the period		469		1,592
Effect Of Adoption Of Ifrs 9		0
Administrative proceedings provision [Member] | Effect of transition to IFRSs [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		1,592
Final balance at the end of the period				1,592
Financial guarantees provision [Member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		52,290	[1]	77,366
Additions recognized in the year		7,708	[1]	55,539
Provisions used during the period		(5)	[1]	0
Provisions reversed during the period		(33,686)	[1]	(80,615)
Foreign currency translation adjustment		8	[1]	0
Effect of discounted cash flows		0	[1]	0
Final balance at the end of the period	[1]	23,100		52,290
Effect Of Adoption Of Ifrs 9	[1]	(3,215)
Financial guarantees provision [Member] | Effect of transition to IFRSs [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning	[1]	49,075
Final balance at the end of the period	[1]			49,075
Loan commitments [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		99,500	[1]	100,748
Additions recognized in the year		21,922	[1]	27,198
Provisions used during the period		0	[1]	0
Provisions reversed during the period		(13,713)	[1]	(28,127)
Foreign currency translation adjustment		5,424	[1]	(319)
Effect of discounted cash flows		0	[1]	0
Final balance at the end of the period	[1]	104,559		99,500
Effect Of Adoption Of Ifrs 9	[1]	(8,574)
Loan commitments [member] | Effect of transition to IFRSs [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning	[1]	90,926
Final balance at the end of the period	[1]			90,926
Onerous contracts provision [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		0
Additions recognized in the year		2,759
Provisions used during the period		0
Provisions reversed during the period		0
Foreign currency translation adjustment		274
Effect of discounted cash flows		0
Final balance at the end of the period		3,033		0
Effect Of Adoption Of Ifrs 9		0
Onerous contracts provision [member] | Effect of transition to IFRSs [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Initial balance at beginning		$ 0
Final balance at the end of the period				$ 0
[1]	The provisions for financial guarantees and loan commitments as of December 31, 2018 were estimated according to the expected credit losses methodology required by IFRS 9, on the other hand, the estimations for the year ended as of December 31, 2017 were computed under IAS 39, therefore both amounts are not comparable. For further information see Note 32 Impacts on application of new standards.

PROVISIONS AND CONTINGENT LIA_4

PROVISIONS AND CONTINGENT LIABILITIES (Details 1) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Beginning balance	$ 8,223,103	$ 8,223,103
Net remeasurement of loss allowance	(4,010)
Provisions used during the period	6,494	10,623
Provisions reversed during the period	(65,971)	(120,246)
Translation adjustment	6,312	(409)
Ending balance	10,235,831	8,223,103
Stage 1
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Beginning balance	125,189
Net remeasurement of loss allowance	(24,851)
Provisions used during the period	28,360
Provisions reversed during the period	(20,459)
Translation adjustment	4,515
Ending balance	112,754	125,189
Stage 2
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Beginning balance	14,502
Net remeasurement of loss allowance	3,239
Provisions used during the period	988
Provisions reversed during the period	(4,757)
Translation adjustment	918
Ending balance	14,890	14,502
Stage 3
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Beginning balance	310
Net remeasurement of loss allowance	17,602
Provisions used during the period	6,741
Provisions reversed during the period	(24,637)
Translation adjustment	(1)
Ending balance	15	$ 310
12-month expected credit losses [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(40,899)
12-month expected credit losses [member] | Stage 1
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(16,727)
12-month expected credit losses [member] | Stage 2
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(20,644)
12-month expected credit losses [member] | Stage 3
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(3,528)
Life time Expected Credit Losses Not Credit impaired Member [Member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	20,717
Life time Expected Credit Losses Not Credit impaired Member [Member] | Stage 1
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(5,216)
Life time Expected Credit Losses Not Credit impaired Member [Member] | Stage 2
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	33,702
Life time Expected Credit Losses Not Credit impaired Member [Member] | Stage 3
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(7,769)
Life time Expected Credit Losses Credit impaired Member [Member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	16,172
Life time Expected Credit Losses Credit impaired Member [Member] | Stage 1
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(2,908)
Life time Expected Credit Losses Credit impaired Member [Member] | Stage 2
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	(9,819)
Life time Expected Credit Losses Credit impaired Member [Member] | Stage 3
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Net remeasurement of loss allowance	$ 28,899

PROVISIONS AND CONTINGENT LIA_5

PROVISIONS AND CONTINGENT LIABILITIES (Details 2) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	$ 5,253,375	$ 6,701,643
Not later than one month [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	303,308	960,268
Later than one month and not later than three months [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	780,103	1,230,687
Later than three months and not later than one year [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	2,287,434	2,946,250
Later than one year and not later than three years [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	1,426,992	1,224,061
Later than three years and not later than five years [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	277,710	149,238
Later than five years [member]
Disclosure Of Provisions And Contingent Liabilites [Line Items]
Financial Guarantees	$ 177,828	$ 191,139

PROVISIONS AND CONTINGENT LIA_6

PROVISIONS AND CONTINGENT LIABILITIES (Details 3)	12 Months Ended
	Dec. 31, 2018USD ($)
Disclosure Of Provisions And Contingent Liabilities [Abstract]
Contingent Liabilities	$ 4,308
Revocatory Action Claim	Revocatory Action claim by Interbolsa S.A. Comisionista de Bolsa vs. Bancolombia
Contingent Liabilitiies Decision	In Bancolombia’s favor

PROVISIONS AND CONTINGENT LIA_7

PROVISIONS AND CONTINGENT LIABILITIES (Details Textual ) $ in Millions	1 Months Ended			12 Months Ended
	Oct. 31, 2018USD ($)	Aug. 31, 2018USD ($)	Sep. 28, 2015USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2016COP ($)
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff				$ 5,000,000,000
Other provisions					$ 168,033		$ 183,794	$ 208,561
HSBC Bank [Member]
Disclosure Of Capital [Line Items]
Share of the company in amount received through irregular means				287
Promotara Terramar [Member]
Disclosure Of Capital [Line Items]
Amount received through irregular means by other entity				299
Municipality of chia [Member] | Bancolombia [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff			$ 5,846	1,126
Melenao Mora and Said Diaz [Member] | Banistmo [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff				20,000
Deniss Rafael Perez Perozo and others [Member] | Banistmo [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff				5,252
Corporacion de Alimentos S.A. de CV [Member] | Banco Agromercantil [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff				6,454
North Shore Development Company [Member] | BAM And Mercom Bank [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff		$ 21,175
Superintendence Of Tax Administration [Member] | Banco Agromercantil [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff	$ 6,752
Tax Authority [Member] | Banagricola S.A. [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff	$ 11,116
Colombia Direccion De Impuestos Y Aduanas [Member] | Bancolombia [Member]
Disclosure Of Capital [Line Items]
Value of damages sought by the plaintiff				$ 6,101
Other provisions						$ 1,127

CAPITAL (Details)

CAPITAL (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Capital [Line Items]
Authorized shares	1,400,000,000	1,400,000,000
Total shares	961,827,000	961,827,000
Subscribed and paid capital (nominal value)	$ 480,914	$ 480,914
Ordinary shares [member]
Disclosure Of Capital [Line Items]
Shares with a nominal value of COP 500 pesos	509,704,584	509,704,584
Preference shares [member]
Disclosure Of Capital [Line Items]
Shares with a nominal value of COP 500 pesos	452,122,416	452,122,416

CAPITAL (Details) (Parenthetica

CAPITAL (Details) (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Ordinary shares [member]
Disclosure Of Capital [Line Items]
Par value per share	$ 500	$ 500
Preference shares [member]
Disclosure Of Capital [Line Items]
Par value per share	$ 500	$ 500

CAPITAL (Details 1)

CAPITAL (Details 1) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
2017
Disclosure Of Capital [Line Items]
Cash dividends per share	$ 1,092
2016
Disclosure Of Capital [Line Items]
Cash dividends per share		$ 1,020
2015
Disclosure Of Capital [Line Items]
Cash dividends per share			$ 950
2014
Disclosure Of Capital [Line Items]
Cash dividends per share				$ 888
2013
Disclosure Of Capital [Line Items]
Cash dividends per share					$ 830
2012
Disclosure Of Capital [Line Items]
Cash dividends per share						$ 776

CAPITAL (Details Textual)

CAPITAL (Details Textual)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Capital [Abstract]
Description Of conditions for declaration of dividend	</div><div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">The annual net profits of Bancolombia must be applied as follows: (i) first, an amount equal to 10.00% of Bancolombia’s net profits to a legal reserve until such reserve is equal to at least 50.00% of the Bank’s paid-in capital; (ii) second, to the payment of the minimum dividend on the preferred shares; and (iii) third, as may be determined in the ordinary annual stockholders’ meeting by the vote of the holders of a majority of the shares entitled to vote.</div></div><div></div><div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">Holders of preferred shares are entitled to receive dividends based on the profits of the preceding fiscal year, after deducting losses affecting the capital and once the amount that shall be legally set apart for the legal reserve has been deducted, but before creating or accruing for any other reserve, of a minimum preferred dividend equal to one per cent (1.00%) yearly of the subscription price of the preferred share, provided this dividend is higher than the dividend assigned to common shares. If this is not the case, the dividend shall be increased to an amount that is equal to the per share dividend on the common shares. The dividend received by holders of common shares may not be higher than the dividend assigned to preferred shares.</div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; background: none;"><div style="font-family: "times new roman", serif; font-size: 10pt; background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">Payment of the preferred dividend shall be made at the time and in the manner established in the general shareholders’ meeting and with the priority indicated by Colombian law.</div></div><div style="font-family: "times new roman", serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; text-align: justify; background: none;"><div style="white-space: pre-line; font-family: "times new roman", serif; font-size: 10pt; background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;"> </div></div><div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;"><div style="font-family: "times new roman", serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">Any stock dividend payable in common shares requires the approval of 80.00% or more of the shares present at a shareholders’ meeting, which will include 80.00% or more of the outstanding preferred shares. In the event that none of the holders of preferred shares is present at such meeting, a stock dividend may only be paid to the holders of common shares that approve such a payment.</div></div>" id="sjs-B4">The declaration, amount and payment of dividends are based on Bancolombia S.A.&#8217;s unconsolidated net income. Dividends must be approved at the ordinary annual shareholders&#8217; meeting upon the recommendation of the Board of Directors. Under the Colombian Commercial Code, after payment of income taxes and appropriation of legal and other reserves, and after setting off losses from prior fiscal years, Bancolombia must distribute to its stockholders at least 50.00% of its annual net income or 70.00% of its annual net income if the total amount of reserves exceeds its outstanding capital, unless such minimum percentages are waived by an affirmative vote of the holders of 78.00% of the shares present at the stockholders&#8217; meeting. Such dividend distribution must be made to all stockholders, in cash or in issued stock of Bancolombia, as may be determined by the stockholders, and within a year from the date of the ordinary annual stockholders&#8217; meeting in which the dividend was declared.&#160;The payment of dividends must be made in cash during the next year since the date when the Annual Meeting takes place and for all the stockholders. If the payment is made in the Bank's own equity securities instead of cash, that situation has to be approved by the 80.00% of the subscribed common shareholders and the 80.00% of the subscribed preferred shares.&lt;div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;">&lt;/div>&lt;div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;">&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">The annual net profits of Bancolombia must be applied as follows: (i) first, an amount equal to 10.00% of Bancolombia&#8217;s net profits to a legal reserve until such reserve is equal to at least 50.00% of the Bank&#8217;s paid-in capital; (ii) second, to the payment of the minimum dividend on the preferred shares; and (iii) third, as may be determined in the ordinary annual stockholders&#8217; meeting by the vote of the holders of a majority of the shares entitled to vote.&lt;/div>&lt;/div>&lt;div>&lt;/div>&lt;div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;">&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">Holders of preferred shares are entitled to receive dividends based on the profits of the preceding fiscal year, after deducting losses affecting the capital and once the amount that shall be legally set apart for the legal reserve has been deducted, but before creating or accruing for any other reserve, of a minimum preferred dividend equal to one per cent (1.00%) yearly of the subscription price of the preferred share, provided this dividend is higher than the dividend assigned to common shares. If this is not the case, the dividend shall be increased to an amount that is equal to the per share dividend on the common shares. The dividend received by holders of common shares may not be higher than the dividend assigned to preferred shares.&lt;/div>&lt;/div>&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; background: none;">&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;">&#160;&lt;/div>&lt;/div>&lt;div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;">&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">Payment of the preferred dividend shall be made at the time and in the manner established in the general shareholders&#8217; meeting and with the priority indicated by Colombian law.&lt;/div>&lt;/div>&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; margin-bottom: 0px; margin-top: 0px; text-align: justify; background: none;">&lt;div style="white-space: pre-line; font-family: &quot;times new roman&quot;, serif; font-size: 10pt; background: none; text-decoration: none; letter-spacing: 0px; top: 0px;;display:inline;">&#160;&lt;/div>&lt;/div>&lt;div style="font-family: 'times new roman', 'serif';font-size: 10pt;margin-bottom: 0;margin-top: 0;text-align: justify;">&lt;div style="font-family: &quot;times new roman&quot;, serif; font-size: 10pt; letter-spacing: 0px; top: 0px;;display:inline;">Any stock dividend payable in common shares requires the approval of 80.00% or more of the shares present at a shareholders&#8217; meeting, which will include 80.00% or more of the outstanding preferred shares. In the event that none of the holders of preferred shares is present at such meeting, a stock dividend may only be paid to the holders of common shares that approve such a payment.&lt;/div>&lt;/div>

APPROPRIATED RESERVES (Details)

APPROPRIATED RESERVES (Details) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Appropiated Reserves [Line Items]
Other reserves		$ 9,741,774	$ 9,045,155
Appropriated Reserves [Member]
Disclosure Of Appropiated Reserves [Line Items]
Other reserves		9,741,774	9,045,155
Appropriation of net income [Member] | Appropriated Reserves [Member]
Disclosure Of Appropiated Reserves [Line Items]
Other reserves	[1]	9,312,009	8,709,922
Fiscal provisions [Member] | Appropriated Reserves [Member]
Disclosure Of Appropiated Reserves [Line Items]
Other reserves	[2]	276,640	196,318
Others [Member] | Appropriated Reserves [Member]
Disclosure Of Appropiated Reserves [Line Items]
Other reserves		$ 153,125	$ 138,915
[1]	The legal reserve fulfills two objetives: to increase and maintain the company's capital and to absorb economic losses. Based on the aforementioned, this amount shall not be distributed in dividends to the stockholders.
[2]	Pursuant to Article 130 of Tax Statute, a non-distributable reserve to the shareholders must be established for the 70% of the diference between the accounting and the tax depreciation, when the tax depreciation is greater than the accounting depreciation.

APPROPRIATED RESERVES (Details

APPROPRIATED RESERVES (Details Textual)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Appropriated Reserves [Abstract]
Explanation of terms to maintain non distributable reserve	  (1)The legal reserve fulfills two objetives: to increase and maintain the company's capital and to absorb economic losses. Based on the aforementioned, this amount shall not be distributed in dividends to the stockholders. (2)Pursuant to Article 130 of Tax Statute, a non-distributable reserve to the shareholders must be established for the 70% of the diference between the accounting and the tax depreciation, when the tax depreciation is greater than the accounting depreciation.

UNCONSOLIDATED STRUCTURED ENT_3

UNCONSOLIDATED STRUCTURED ENTITIES (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of unconsolidated structured entities [line items]
Loans and advances to customers	$ 163,583,285	$ 152,244,991
Securitisation [Member]
Disclosure of unconsolidated structured entities [line items]
Total assets of the entities	1,969,887	2,110,967
Investments at fair value through profit or loss	196,927	252,881
Investments at fair value through other comprehensive income	209,164	187,471
Loans and advances to customers	0	0
Total assets in relation to The Bank's interests in the unconsolidated structured entities	406,091	440,352
The Bank's maximum exposure	406,091	440,352
Bank's managed funds [Member]
Disclosure of unconsolidated structured entities [line items]
Total assets of the entities	128,257,719	120,320,401
Investments at fair value through profit or loss	0	0
Investments at fair value through other comprehensive income	0	0
Loans and advances to customers	5,417,235	3,626,152
Total assets in relation to The Bank's interests in the unconsolidated structured entities	5,417,235	3,626,152
The Bank's maximum exposure	5,417,235	3,626,152
Total [Member]
Disclosure of unconsolidated structured entities [line items]
Total assets of the entities	130,227,606	122,431,368
Investments at fair value through profit or loss	196,927	252,881
Investments at fair value through other comprehensive income	209,164	187,471
Loans and advances to customers	5,417,235	3,626,152
Total assets in relation to The Bank's interests in the unconsolidated structured entities	5,823,326	4,066,504
The Bank's maximum exposure	$ 5,823,326	$ 4,066,504

OPERATING INCOME (Details)

OPERATING INCOME (Details) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of operating income and operating expense [Line Items]
Debt investments, net	$ 129,017	$ 159,890	$ 163,311
Gains (losses) on financial assets at fair value through profit or loss	384,610	525,423	544,184
Total Interest on investment securities	384,610	525,423	542,946
Debt Securities [Member]
Disclosure of operating income and operating expense [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	472,357	699,841	579,403
Derivatives [member]
Disclosure of operating income and operating expense [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	(22,575)	(61,667)	(4,750)
Spot transactions [Member]
Disclosure of operating income and operating expense [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	(13,734)	3,517	(22,831)
Repos [Member]
Disclosure of operating income and operating expense [Line Items]
Gains (losses) on financial assets at fair value through profit or loss	$ (51,438)	$ (116,268)	$ (7,638)

OPERATING INCOME (Details 1)

OPERATING INCOME (Details 1) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disclosure of operating income and operating expense [Abstract]
Deposits	$ (3,852,061)	$ (4,279,316)		$ (3,878,528)
Debt securities in issue	(1,139,456)	(1,191,000)		(1,335,192)
Financial borrowings	(583,321)	(672,472)		(723,385)
Preferred shares	(58,714)	(58,714)		(58,714)
Borrowings from other financial institutions	(18,134)	(15,860)		(6,345)
Other interest	(18,530)	(15,624)		(50,936)
Interest expenses	$ (5,670,216)	$ (6,232,986)	[1]	$ (6,053,100)	[2]
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

OPERATING INCOME (Details 2)

OPERATING INCOME (Details 2) $ in Millions		12 Months Ended
		Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)		Dec. 31, 2016USD ($)
Revenue from contracts with customers
Revenue from contracts with customers	[1]	$ 86,759		$ 90,590
Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		$ 2,841,302		$ 2,531,221		$ 2,063,018
Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		312,762		317,753		291,853
Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		227,114		211,159		203,623
Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		141,253		126,022		81,737
Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		313,908		285,648		239,610
Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		20,271		28,747		19,843
Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		113,970		97,185		80,571
Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		20,840		19,390		30,263
Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		2,988		3,989		1,699
Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		3,994,408		3,621,114		3,012,217
Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		(149)		0		287,716
Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		3,994,259		3,621,114		3,299,933
Banking services [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			370,671		335,101	[2]	329,114	[2]
Banking services [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			66,569		177,930	[2]	159,015	[2]
Banking services [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			85,615		80,672	[2]	75,732	[2]
Banking services [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			39,610		38,643	[2]	37,831	[2]
Banking services [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Banking services [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Banking services [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Banking services [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			12,783		15,821	[2]	12,343	[2]
Banking services [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Banking services [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			575,248		648,167	[2]	614,035	[2]
Banking services [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		4,774
Banking services [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			575,248		648,167	[2]	618,809	[2]
Credit and debit card fees and commercial estabilshments [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			1,258,047		1,080,814	[2]	803,731	[2]
Credit and debit card fees and commercial estabilshments [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			185,466		80,348	[2]	84,152	[2]
Credit and debit card fees and commercial estabilshments [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			97,163		89,330	[2]	87,862	[2]
Credit and debit card fees and commercial estabilshments [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			66,731		51,175	[2]	4,771	[2]
Credit and debit card fees and commercial estabilshments [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Credit and debit card fees and commercial estabilshments [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Credit and debit card fees and commercial estabilshments [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Credit and debit card fees and commercial estabilshments [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			3,707		2,876	[2]	4,634	[2]
Credit and debit card fees and commercial estabilshments [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Credit and debit card fees and commercial estabilshments [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			1,611,114		1,304,543	[2]	985,150	[2]
Credit and debit card fees and commercial estabilshments [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		188,752
Credit and debit card fees and commercial estabilshments [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			1,611,114		1,304,543	[2]	1,173,902	[2]
Brokerage [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Brokerage [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			7,033		2,302	[2]	5,195	[2]
Brokerage [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Brokerage [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			29		35	[2]	45	[2]
Brokerage [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Brokerage [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Brokerage [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			20,012		20,593	[2]	23,390	[2]
Brokerage [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Brokerage [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Brokerage [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			27,074		22,930	[2]	28,630	[2]
Brokerage [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		0
Brokerage [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			27,074		22,930	[2]	28,630	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			33,313		41,077	[2]	45,664	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			15,352		15,699	[2]	18,406	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			4,749		4,080	[2]	3,485	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			3,055		2,210	[2]	2,554	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			897		404	[2]	607	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			57,366		63,470	[2]	70,716	[2]
Acceptances Guarantees and Standby Letters of Credit [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		0
Acceptances Guarantees and Standby Letters of Credit [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			57,366		63,470	[2]	70,716	[2]
Trust [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Trust [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			8,184		4,510	[2]	4,011	[2]
Trust [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			1,411		1,335	[2]	1,075	[2]
Trust [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			645		713	[2]	712	[2]
Trust [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			313,886		285,648	[2]	239,610	[2]
Trust [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Trust [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			81,502		68,180	[2]	49,903	[2]
Trust [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			37		36	[2]	0	[2]
Trust [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			104		(58)	[2]	0	[2]
Trust [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			405,769		360,364	[2]	295,311	[2]
Trust [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		0
Trust [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			405,769		360,364	[2]	295,311	[2]
Securities brokerage [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Securities brokerage [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			1,200		2,702	[2]	0	[2]
Securities brokerage [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			1,212		0	[2]	834	[2]
Securities brokerage [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Securities brokerage [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Securities brokerage [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			20,262		28,747	[2]	19,843	[2]
Securities brokerage [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			9,530		6,778	[2]	3,700	[2]
Securities brokerage [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Securities brokerage [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		843	[2]	0	[2]
Securities brokerage [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			32,204		39,070	[2]	24,377	[2]
Securities brokerage [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		0
Securities brokerage [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			32,204		39,070	[2]	24,377	[2]
Bancassurance [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			495,232		427,190	[2]	355,523	[2]
Bancassurance [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			28,466		23,847	[2]	20,885	[2]
Bancassurance [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			112		0	[2]	64	[2]
Bancassurance [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Bancassurance [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Bancassurance [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Bancassurance [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Bancassurance [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Bancassurance [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		85	[2]	0	[2]
Bancassurance [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			523,810		451,122	[2]	376,472	[2]
Bancassurance [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		0
Bancassurance [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			523,810		451,122	[2]	376,472	[2]
Payment and collections [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			559,139		531,567	[2]	480,611	[2]
Payment and collections [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			4,084		4,369	[2]	6,245	[2]
Payment and collections [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			0		0	[2]	0	[2]
Payment and collections [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			563,223		535,936	[2]	486,856	[2]
Payment and collections [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		0		0		0
Payment and collections [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			563,223		535,936	[2]	486,856	[2]
Others [Member] | Banking Colombia [Member]
Revenue from contracts with customers
Revenue from contracts with customers			124,900		115,472	[2]	48,375	[2]
Others [Member] | Banking Panama [Member]
Revenue from contracts with customers
Revenue from contracts with customers			492		10,415	[2]	189	[2]
Others [Member] | Banking El Salvador [Member]
Revenue from contracts with customers
Revenue from contracts with customers			36,852		35,742	[2]	34,571	[2]
Others [Member] | Banking Guatemala [Member]
Revenue from contracts with customers
Revenue from contracts with customers			27,099		28,877	[2]	29,579	[2]
Others [Member] | Trust [Member]
Revenue from contracts with customers
Revenue from contracts with customers			22		0	[2]	0	[2]
Others [Member] | Investment banking [Member]
Revenue from contracts with customers
Revenue from contracts with customers			9		0	[2]	0	[2]
Others [Member] | Brokerage [Member]
Revenue from contracts with customers
Revenue from contracts with customers			2,926		1,634	[2]	3,578	[2]
Others [Member] | Off shore [Member]
Revenue from contracts with customers
Revenue from contracts with customers			3,416		253	[2]	12,679	[2]
Others [Member] | Other Segments [Member]
Revenue from contracts with customers
Revenue from contracts with customers			2,884		3,119	[2]	1,699	[2]
Others [Member] | Total before eliminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			198,600		195,512	[2]	130,670	[2]
Others [Member] | Adjustments for consolidation purposes [Member]
Revenue from contracts with customers
Revenue from contracts with customers	[2]		(149)		0		94,190
Others [Member] | Total aftere liminations [Member]
Revenue from contracts with customers
Revenue from contracts with customers			$ 198,451		$ 195,512	[2]	$ 224,860	[2]
[1]	See Note 24.3 Fees and commissions.
[2]	For further information about composition of Bank’ segments see Note 3

OPERATING INCOME (Details 3)

OPERATING INCOME (Details 3) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of operating income and operating expense [Abstract]
Receivables from contracts with customers	[1]	$ 86,759	$ 90,590	$ 57,567
Contract liabilities		$ 75,845	$ 118,857	$ 34,487
[1]	The impairment corresponding to the receivable accounts from contracts from customers is COP 11,975, COP 9,639 and COP 1,069 for the year 2018, 2017 and 2016 respectly.

OPERATING INCOME (Details 4)

OPERATING INCOME (Details 4) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disclosure of operating income and operating expense [Abstract]
Banking services	$ (542,628)	$ (508,462)		$ (473,109)
Call Center and Website	(309,403)	(291,602)		(260,006)
Others	(361,025)	(275,051)		(235,855)
Fees and commission expenses	$ (1,213,056)	$ (1,075,115)	[1]	$ (968,970)	[2]
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

OPERATING INCOME (Details 5)

OPERATING INCOME (Details 5) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disclosure of operating income and operating expense [Abstract]
Operating leases		$ 624,062	$ 563,861		$ 493,486
Net foreign exchange		(205,798)	294,068		132,292
Derivatives foreign exchange contracts		267,189	21,917		164,172
Services	[1]	170,459	164,150		167,914
Investment property valuation		77,350	55,573		149,299
Gains on sale of assets		75,976	40,600		60,282
Insurance	[2]	54,679	49,640		49,679
Other reversals		47,657	140,012		37,767
Hedging		14,158	(3,678)		(5,985)
Penalties for failure to contracts		16,302	19,881		14,634
Others		61,768	232,185		203,115
Total Other operating income		$ 1,203,802	$ 1,578,209	[3]	$ 1,466,655	[4]
[1]	Corresponds to income from contracts with customers. To see more information see Note 24.3 Commissions. The gains on sale of portfolio in December 2018 and 2017 amounts to 14,707 and 13,928, respectively.
[2]	Corresponds to income from Seguros Agromercantil insurance operations.
[3]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[4]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

OPERATING INCOME (Details 6)

OPERATING INCOME (Details 6) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disclosure of operating income and operating expense [Line Items]
Equity method		$ 187,814	$ 253,602		$ 60,254
Total dividends received, and share of profits of equity method investees		341,795	266,170	[1]	176,692	[2]
Profits of equity method investees [Member]
Disclosure of operating income and operating expense [Line Items]
Dividends	[3]	67,582	32,248		39,785
Equity investments	[4]	86,399	(19,680)		77,799
Equity method	[5]	187,814	253,602		60,254
Gains (Losses) on sale of Discontinued Operations		0	0		(1,146)
Total dividends received, and share of profits of equity method investees		$ 341,795	$ 266,170		$ 176,692
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[3]	Dividends received from equity investments at fair value through profit or loss as of 31, December of 2018, 2017 and 2016 amount COP 54,477, COP 20,297 and COP 30,468, respectively. Dividends from equity investments at fair value through OCI amount COP 13,105, COP 11,951 and COP 9,317, respectively. As of December 31, 2018, 2017 and 2016, the amount includes dividends of investments derecognised for COP 950, COP 1,556 and COP 1,638, respectively.
[4]	As of December 31, 2018, there is a profit on capital investments due to the increase in fair value in the portfolio measured at fair value through the profit or loss maintained by Banagricola S.A.
[5]	For further information, see note 7 investments in associates and joint ventures

OPERATING INCOME (Details Textu

OPERATING INCOME (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of operating income and operating expense [Line Items]
Interest income (expense)	$ 10,541,522	$ 10,584,976	$ 9,818,313
Increase (decrease) through cumulative catch-up adjustments to revenue, contract liabilities	43,012
Impairment loss on receivables or contract assets arising from contracts with customers	11,975	9,639	1,069
Dividends From Derecognized Investments	950	1,556	1,638
Gains on disposals of investments	$ 14,707	13,928
Bottom of range [member]
Disclosure of operating income and operating expense [Line Items]
Intermediation Margin	4.00%
Top of range [member]
Disclosure of operating income and operating expense [Line Items]
Intermediation Margin	12.00%
Fair value through profit or loss [Member]
Disclosure of operating income and operating expense [Line Items]
Dividends received	$ 54,477	20,297	30,468
Fair value through other comprehensive income [Member]
Disclosure of operating income and operating expense [Line Items]
Dividends received	$ 13,105	$ 11,951	$ 9,317

OPERATING EXPENSES (Details)

OPERATING EXPENSES (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of operating expenses [Abstract]
Maintenance and repairs		$ 585,377	$ 530,284	$ 448,017
Others Fees		429,121	427,517	411,521
Insurance		331,430	303,501	286,384
Leasing		256,872	244,956	246,445
Transport		183,857	158,561	154,220
Disputes, fines and sanctions	[1]	63,685	139,146	52,441
Frauds and claims	[2]	117,032	134,087	72,860
Data processing		147,294	130,125	101,347
Advertising		144,900	127,142	120,046
Public services		108,420	107,727	114,840
Cleaning and security services		97,848	92,359	93,336
communications		73,072	67,201	61,943
Contributions and affiliations		66,636	60,320	59,406
Properties improvements and installation		52,937	59,121	55,307
Useful and stationery		63,321	58,145	61,699
Travel expenses		37,006	38,037	37,112
Production and supply cards		26,575	32,975	29,532
Trust		31,100	25,901	13,176
Legal and financial consultants		31,072	25,855	29,435
Real estate management		23,694	21,817	19,262
Board of directors and audit fee		21,733	20,450	20,926
Donations		17,402	17,048	18,338
Storage services		15,664	16,162	14,157
Activities Joint Operations		8,719	9,650	8,805
Public relations		2,899	5,912	5,101
Legal expenses		3,570	4,112	5,897
Temporary services		3,724	3,907	7,232
Others		79,809	115,866	102,549
Total other administrative and general expenses		3,024,769	2,977,884	2,651,334
Wealth tax, contributions and other tax burden		$ (692,666)	$ (727,661)	$ (741,184)
[1]	The increase in disputes, fines and sanctions during the year 2017 is caused by the recognition of an income tax provision related with a potential exposure for the fiscal year 2014, consisting in an unrecognized tax benefits amounting to COP 201,554 in income tax liabilities related to tax positions. The 2014 income tax return has been subject to review from the tax authority since April 23, 2015.
[2]	The increases in frauds and claims during the year 2018 and 2017 compared with the level of expense recognized as of December 31, 2016, are mainly explained by higher operational risk in virtual transactions and transactions with credit and debit cards.

OPERATING EXPENSES (Details 1)

OPERATING EXPENSES (Details 1) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of operating expenses [Abstract]
Impairment of the other assets	$ 27,746	$ 46,078	$ 38,775
Depreciation of premises and equipment	342,605	316,281	329,258
Amortization of intangible assets	123,551	116,752	149,776
Total impairment, depreciation and amortization	$ 493,902	$ 479,111	$ 517,809

OPERATING EXPENSES (Details 2)

OPERATING EXPENSES (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	$ 27,746	$ 46,078	$ 38,775
Banking Colombia [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	20,036	33,889	15,078
Banking Panama [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	6,523	5,495	1,934
Banking El Salvador [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	(2,137)	3,363	19,705
Banking Guatemala [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	2,672	1,939	2,118
All Other Segments [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	812	1,418	0
Off shore [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	(173)	(26)	(60)
Brokerage [Member]
Disclosure of operating expenses [Line Items]
Impairment loss (reversal of impairment loss) recognised in profit or loss	$ 13	$ 0	$ 0

OPERATING EXPENSES (Details Tex

OPERATING EXPENSES (Details Textual) $ in Millions	Dec. 31, 2014COP ($)
Disclosure of operating expenses [Line Items]
Unrecognized Tax Benefits	$ 201,554

EARNING PER SHARE ('EPS') (Deta

EARNING PER SHARE ('EPS') (Details) - COP ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of earnings per share [Abstract]
Income from continuing operations before attribution of non-controlling interests	$ 2,786,435	$ 2,754,173	$ 2,791,450
Less: Non-controlling interests from continuing operations	127,571	139,173	89,619
Net income from continuing operations	2,658,864	2,615,000	2,701,831
Income from operations and disposals of discontinued operations, net of taxes	0	0	163,497
Less: Non-controlling interests from discontinuing operations	0	0	0
Net income attributable to the controlling interest	2,658,864	2,615,000	2,865,328
Less: Preferred dividends declared	402,451	370,983	342,825
Less: Allocation of undistributed earnings to preferred stockholders	816,277	827,126	972,955
Continuing operations	816,277	827,126	896,100
Discontinued operations	0	0	76,855
Net income allocated to common shareholders for basic and diluted EPS	$ 1,440,136	$ 1,416,891	$ 1,549,548
Weighted average number of common shares outstanding used in basic EPS calculation (in millions)	510	510	510
Basic and Diluted earnings per share to common shareholders	$ 2,825	$ 2,780	$ 3,040
From continuing operations	2,825	2,780	2,870
From discontinuing operations	$ 0	$ 0	$ 170

RELATED PARTY TRANSACTIONS (Det

RELATED PARTY TRANSACTIONS (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Assets
Investments		$ 2,149,579	[1]	$ 1,565,059	[2]
Assets held for sale and inventories		636,028		377,003
Other Assets		3,234,181		2,479,037
Total assets		220,113,618		203,908,211
Liabilities
Deposits		142,128,471		131,959,215
Other Liabilities		6,768,253		5,796,482
Total liabilities		193,458,393		179,478,661
Income
Interest and other operating income		16,116,500		16,696,393		$ 15,748,805	[3]
Net income		2,786,435		2,754,173		2,954,947
Expenses
Interests and other operating expenses		5,670,216		6,232,986	[4]	6,053,100	[3]
Fees		1,213,056		1,075,115	[4]	968,970	[3]
Others		267,507		249,023		258,265
Stockholders with an interest equal or higher than 20% of the Bank's capital [Member]
Assets
Investments		0		0		0
Loans and advances to customers and financial entities, net		642,319		423,706		246,245
Assets held for sale and inventories		0		0
Other Assets		0		0		0
Total assets		642,319		423,706		246,245
Liabilities
Deposits		386,467		363,335		145,266
Other Liabilities		0		0		0
Total liabilities		386,467		363,335		145,266
Income
Interest and other operating income		29,998		6,989		8,951
Dividends		0		0		0
Others		0		0		0
Net income		29,998		6,989		8,951
Expenses
Interests and other operating expenses		10,844		5,603		430
Fees		0		0		0
Others		0		0		0
Total expenses		10,844		5,603		430
Directors and senior management [Member]
Assets
Investments		11		0		0
Loans and advances to customers and financial entities, net		21,331		17,342		15,709
Assets held for sale and inventories		0		0
Other Assets		0		2		389
Total assets		21,342		17,344		16,098
Liabilities
Deposits		5,028		4,363		3,750
Other Liabilities		0		3		0
Total liabilities		5,028		4,366		3,750
Income
Interest and other operating income		558		419		931
Dividends		0		0		0
Others		0		0		0
Net income		558		419		931
Expenses
Interests and other operating expenses		239		269		767
Fees		1,145		1,109		1,001
Others		54		53		0
Total expenses		1,438		1,431		1,768
Associates and joint ventures [Member]
Assets
Investments		2,450,467		1,855,511		1,688,543	[5]
Loans and advances to customers and financial entities, net		108,833		124,592		36,262	[5]
Assets held for sale and inventories	[6]	19,128		18,413
Other Assets		177,537	[7]	127,022	[8]	64,078	[5]
Total assets		2,755,965		2,125,538		1,788,883	[5]
Liabilities
Deposits		190,046		163,932		230,176	[5]
Other Liabilities		35,581		92		31,941	[5]
Total liabilities		225,627		164,024		262,117	[5]
Income
Interest and other operating income		11,214		11,224		6,089	[5]
Dividends		101,091	[9]	48,403		49,627	[5]
Others		41,985		51,613		51,586	[5]
Net income		154,290		111,240		107,302	[5]
Expenses
Interests and other operating expenses		5,790		20,139		13,912	[5]
Fees		3		19		5	[5]
Others		80,312		29,431		37,370	[5]
Total expenses		$ 86,105		$ 49,589		$ 51,287	[5]
[1]	As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[2]	As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[3]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[4]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[5]	This ítem includes operations held between Bancolombia S.A. and Compañía de Financiamiento Tuya S.A. since November 1, 2016 when the Bank lost control of Tuya S.A. Furthermore, the item includes operations held between Bancolombia S.A. and Sociedad Servicios de Aceptación S.A.S. since June 2016, when that company was set up.
[6]	Investment classified as held for sale. See Note 12. Assets held for sale and Inventories.
[7]	This item includes portfolio purchase operation held between Bancolombia S.A. and Titularizadora Colombiana and the outstanding dividend on the preferred shares of the Compañía de Financiamiento TUYA S.A.
[8]	This ítem includes portfolio purchase operation held between Bancolombia S.A. and Titularizadora Colombiana.
[9]	Includes dividend received for preferred shares in Compañía de Financiamiento TUYA S.A.

RELATED PARTY TRANSACTIONS (D_2

RELATED PARTY TRANSACTIONS (Details 1) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Assets
Investments	$ 2,149,579	[1]	$ 1,565,059	[2]
Other assets	3,234,181		2,479,037
Total assets	220,113,618		203,908,211
Liabilities
Deposits	142,128,471		131,959,215
Other Liabilities	6,768,253		5,796,482
Total liabilities	193,458,393		179,478,661
Income
Interest and other operating income	16,116,500		16,696,393		$ 15,748,805	[3]
Net income	2,786,435		2,754,173		2,954,947
Expenses
Interests and other operating expenses	5,670,216		6,232,986	[4]	6,053,100	[3]
Fees	1,213,056		1,075,115	[4]	968,970	[3]
Others	267,507		249,023		$ 258,265
Financial Conglomerate Operations [Member]
Assets
Investments	440,294		376,171
Loans and advances to customers and financial entities, net	455,675		191,278
Other assets	2		8
Total assets	895,971		567,457
Liabilities
Deposits	1,347,005		1,015,523
Other Liabilities	5,818		1,882
Total liabilities	1,352,823		1,017,405
Income
Interest and other operating income	602,831		488,190
Dividends	14,909		15,021
Net income	617,740		503,211
Expenses
Interests and other operating expenses	54,758		32,568
Fees	2		4
Others	3,025		4,788
Total expenses	$ 57,785		$ 37,360
[1]	As of December 31, 2018, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[2]	As of December 31, 2017, Banking Panama, Banking Guatemala, Brokerage and off shore did not have investments in associates and joint ventures.
[3]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[4]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

RELATED PARTY TRANSACTIONS (D_3

RELATED PARTY TRANSACTIONS (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Disclosure of related party transactions [Line Items]
Cash and cash equivalents	$ 18,730,810	$ 18,165,644	$ 20,460,245		$ 18,805,577
Other Assets	3,234,181	2,479,037
Deposits from customers	142,128,471	131,959,215
Debt instruments issued	20,287,233	19,648,714
Other Liabilities	$ 6,768,253	5,796,482
Stockholders [Member]
Disclosure of related party transactions [Line Items]
Description of ownership interest percentage	20.00%
Board of Directors and Senior Management [Member]
Disclosure of related party transactions [Line Items]
Description of ownership interest percentage	10.00%
Assorciates and joint ventures [Member]
Disclosure of related party transactions [Line Items]
Description of ownership interest percentage	20.00%
Assorciates and joint ventures [Member] | Top of range [member]
Disclosure of related party transactions [Line Items]
Description of ownership interest percentage	50.00%
Board of Directors [Member]
Disclosure of related party transactions [Line Items]
Key management personnel compensation	$ 1,145	1,109	1,001
Senior Managment [Member]
Disclosure of related party transactions [Line Items]
Key management personnel compensation, short-term employee benefits	17,245	14,320	12,956
Key management personnel compensation, other long-term employee benefits	427	922	589
Other related parties [member]
Disclosure of related party transactions [Line Items]
Key management personnel compensation, post-employment benefits	$ 590	$ 460	$ 13,994
Parent [Member]
Disclosure of related party transactions [Line Items]
Portfolio loans and financial leasing contracts				$ 15,186,102
Cash and cash equivalents				295,852
Other Assets				1,097,058
Deposits from customers				8,944,845
Debt instruments issued				2,387,940
Other Liabilities				$ 3,117,115

LIABILITIES FROM FINANCING AC_3

LIABILITIES FROM FINANCING ACTIVITIES (Details) - COP ($) $ in Millions		12 Months Ended
		Dec. 31, 2018		Dec. 31, 2017
Disclosure of liabilities from financing activities [Line Items]
Balance as of January 1, 2018		$ 37,289,979		$ 40,116,634
Cash flows		(2,164,995)		(4,667,575)
Foreign currency translation adjustment		2,555,763		(252,266)
Interests accrued		1,745,252		2,131,740
Other movements		98,750		(38,554)
Balance as of December 31, 2018		39,524,749		37,289,979
Repurchase agreements and other similar secured borrowing [Member]
Disclosure of liabilities from financing activities [Line Items]
Balance as of January 1, 2018		3,236,128		1,924,010
Cash flows		(922,840)		1,313,442
Foreign currency translation adjustment		2,267		(1,324)
Interests accrued		0		0
Other movements		0		0
Balance as of December 31, 2018		2,315,555		3,236,128
Borrowings from other financial institutions [member]
Disclosure of liabilities from financing activities [Line Items]
Balance as of January 1, 2018	[1]	13,822,152	[2]	18,905,843
Cash flows		513,244	[2]	(5,883,247)	[1]
Foreign currency translation adjustment		1,297,690	[2]	(177,290)	[1]
Interests accrued		783,349	[2]	1,075,716	[1]
Other movements		(78,471)	[2],[3]	(98,870)	[1],[4]
Balance as of December 31, 2018	[2]	16,337,964		13,822,152	[1]
Debt securities in issue [Member]
Disclosure of liabilities from financing activities [Line Items]
Balance as of January 1, 2018	[1]	19,648,714	[2]	18,704,809
Cash flows		(1,697,698)	[2]	(40,069)	[1]
Foreign currency translation adjustment		1,255,806	[2]	(73,652)	[1]
Interests accrued		961,903	[2]	1,056,024	[1]
Other movements		118,508	[2]	1,602	[1]
Balance as of December 31, 2018	[2]	20,287,233		19,648,714	[1]
Preferred shares [Member]
Disclosure of liabilities from financing activities [Line Items]
Balance as of January 1, 2018	[5]	582,985		581,972
Cash flows	[5]	(57,701)		(57,701)
Foreign currency translation adjustment	[5]	0		0
Interests accrued	[5]	0		0
Other movements	[5]	58,713		58,714
Balance as of December 31, 2018	[5]	$ 583,997		$ 582,985
[1]	The cash flows disclosed in this table related with Borrowings from other financial institutions and Debt securities in issue include the interests paid during the year amounting to COP 1,031,078 and COP 1,084,096, respectively, which are classified as cash flows from operating activities in the consolidated statement of cash flow.
[2]	The cash flows disclosed in this table related with Borrowings from other financial institutions and Debt securities in issue include the interests paid during the year amounting to COP 788,879 and COP 961,333, respectively, which are classified as cash flows from operating activities in the consolidated statement of cash flow.
[3]	The amount of COP (78,471) is mainly comprised by the decrease of the liabilities related to assets held for sale.
[4]	The amount of COP (98,870) is mainly comprised by the reclassification of liabilities relating to assets held for sale.
[5]	The cash flow amounting to COP 57,701 corresponds to the fixed minimum dividend paid to the preferred shares' holders and is included in the line "dividends paid" of the consolidated statement of cash flow, which includes the divideds paid during the year to both preferred and common shares holders.

LIABILITIES FROM FINANCING AC_4

LIABILITIES FROM FINANCING ACTIVITIES (Details Textual) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of liabilities from financing activities [Line Items]
Interest paid, classified as operating activities	$ 5,103,246	$ 5,798,689	$ 5,229,165
Dividends paid, classified as financing activities	735,798	1,126,209	$ 840,242
Bottom of range [member]
Disclosure of liabilities from financing activities [Line Items]
Reclassification of liabilities related to assets held for sale	78,471	98,870
Borrowings from other financial institutions [member]
Disclosure of liabilities from financing activities [Line Items]
Interest paid, classified as operating activities	788,879	1,031,078
Debt securities in issue [Member]
Disclosure of liabilities from financing activities [Line Items]
Interest paid, classified as operating activities	$ 961,333	$ 1,084,096

FAIR VALUE OF ASSETS AND LIAB_3

FAIR VALUE OF ASSETS AND LIABILITIES (Details) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Assets
Derivative financial instruments		$ 1,843,708	$ 1,134,372
Loans and advances to customers and financial institutions, net		163,583,285	152,244,991
Investment property	[1]	1,732,873	1,657,409
Total		220,113,618	203,908,211
Liabilities
Deposits by customers		142,128,471	131,959,215
Interbank deposits		1,374,222	1,084,591
Repurchase agreements and other similar secured borrowing		2,315,555	3,236,128
Derivative financial instruments		1,295,070	945,853
Borrowings from other financial institutions		16,337,964	13,822,152
Preferred shares		583,997	582,985
Debt securities in issue		20,287,233	19,648,714
Total		193,458,393	179,478,661
Carrying amount
Assets
Debt securities at amortized cost		3,481,928	4,157,568
Equity securities at fair value		1,639,948	1,517,830
Derivative financial instruments		1,843,708	1,134,372
Loans and advances to customers and financial institutions, net		163,583,285	152,244,991
Investment property		1,732,873	1,657,409
Invesments in associates and joint ventures	[2]	1,119,973	757,886
Equity securities - Assets held for sale		0	2,486
Total		185,641,314	172,174,397
Liabilities
Deposits by customers		142,128,471	131,959,215
Interbank deposits		1,374,222	1,084,591
Repurchase agreements and other similar secured borrowing		2,315,555	3,236,128
Derivative financial instruments		1,295,070	945,853
Borrowings from other financial institutions		16,337,964	13,822,152
Preferred shares		583,997	582,985
Debt securities in issue		20,287,233	19,648,714
Total		184,322,512	171,279,638
Carrying amount | Financial assets at fair value through profit or loss, category [member]
Assets
Debt securities at fair value		8,909,861	10,701,855
Carrying amount | Financial assets at fair value through other comprehensive income, category [member]
Assets
Debt securities at fair value	[3]	3,329,738	0
Fair Value
Assets
Debt securities at amortized cost		3,461,616	4,131,688
Equity securities at fair value		1,639,948	1,517,830
Derivative financial instruments		1,843,708	1,134,372
Loans and advances to customers and financial institutions, net		167,551,429	149,162,071
Investment property		1,732,873	1,657,409
Invesments in associates and joint ventures	[2]	1,119,973	757,886
Equity securities - Assets held for sale		0	2,486
Total		189,589,146	169,065,597
Liabilities
Deposits by customers		142,860,996	132,779,730
Interbank deposits		1,374,222	1,084,591
Repurchase agreements and other similar secured borrowing		2,315,555	3,236,128
Derivative financial instruments		1,295,070	945,853
Borrowings from other financial institutions		16,337,964	13,822,152
Preferred shares		602,597	662,999
Debt securities in issue		20,759,456	20,756,154
Total		185,545,860	173,287,607
Fair Value | Financial assets at fair value through profit or loss, category [member]
Assets
Debt securities at fair value		8,909,861	10,701,855
Fair Value | Financial assets at fair value through other comprehensive income, category [member]
Assets
Debt securities at fair value	[3]	$ 3,329,738	$ 0
[1]	Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC).
[2]	It corresponds investments in associates P.A Viva Malls. See Note 7 investments in associates and joint ventures
[3]	For further information, see classification under IFRS 9, as described in Note 32 impacts on application of new standards.

FAIR VALUE OF ASSETS AND LIAB_4

FAIR VALUE OF ASSETS AND LIABILITIES (Details 1) - COP ($) $ in Millions		Dec. 31, 2018		Dec. 31, 2017
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		$ 173,819,116		$ 160,468,094
Debt instruments at fair value through OCI		0		529,375
Derivative financial assets		1,843,708		1,134,372
Investment property	[1]	1,732,873		1,657,409
Investments in associates	[2]	1,710,969		1,327,610
Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		2,486
PA Viva Malls [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		1,119,973	[3]	757,886
Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		294,345		172,310
Equity contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		981		372
Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		295,326		172,682
Derivative financial assets		295,326		172,682
Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		96,218		14,995
Recurring fair value measurement [member]
Disclosure of fair value of assets and liabilities [Line Items]
Total		18,576,101		15,771,838
Debt instruments held		8,909,861		10,701,855
Debt instruments at fair value through OCI		12,239,599		10,701,855
Equity instruments held		1,639,948		1,517,830
Derivative financial assets		1,843,708		1,134,372
Investment property		1,732,873		1,657,409
Investments in associates		1,119,973		757,886
Recurring fair value measurement [member] | PA Viva Malls [Member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		1,119,973		757,886
Recurring fair value measurement [member] | Buildings [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		1,483,594		1,425,585
Recurring fair value measurement [member] | Land [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		249,279		231,824
Recurring fair value measurement [member] | Interest rate contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		252,928		274,137
Recurring fair value measurement [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		1,199,236		672,558
Recurring fair value measurement [member] | Debt instruments at fair value through OCI
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments at fair value through OCI		3,329,738		0
Recurring fair value measurement [member] | Trading equity securities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		1,639,948		1,517,830
Recurring fair value measurement [member] | Equity securities held for sale [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		2,486
Recurring fair value measurement [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		7,242,168		7,003,147
Recurring fair value measurement [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		43,846		36,038
Recurring fair value measurement [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		661,176		1,052,776
Debt instruments at fair value through OCI		186,250		0
Recurring fair value measurement [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		817,639		2,471,994
Debt instruments at fair value through OCI		3,143,488		0
Recurring fair value measurement [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		145,032		137,900
Recurring fair value measurement [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		96,218		14,995
Recurring fair value measurement [member] | Option contract [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		96,218		14,995
Level 1 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Total		9,502,125		7,584,761
Equity instruments held		0		0
Derivative financial assets		2,935		8,171
Investments in associates		0		0
Level 1 of fair value hierarchy [member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		0
Level 1 of fair value hierarchy [member] | Interest rate contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		2,935		8,171
Level 1 of fair value hierarchy [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		0		0
Derivative financial assets		0		0
Level 1 of fair value hierarchy [member] | Equity contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		7,768,578		7,431,340
Debt instruments at fair value through OCI		9,398,957		7,431,340
Equity instruments held		100,233		145,250
Derivative financial assets		2,935		8,171
Investment property		0		0
Investments in associates		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | PA Viva Malls [Member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Buildings [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Land [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Equity contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Debt instruments at fair value through OCI
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments at fair value through OCI		1,630,379		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Trading equity securities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		100,233		145,250
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Equity securities held for sale [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		7,170,085		6,013,860
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		24,588		9,186
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		115,234		177,531
Debt instruments at fair value through OCI		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		397,115		1,196,963
Debt instruments at fair value through OCI		1,630,379		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		61,556		33,800
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		0		0
Level 1 of fair value hierarchy [member] | Recurring fair value measurement [member] | Option contract [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		0		0
Level 2 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Total		3,983,723		3,780,973
Equity instruments held		97,394		78,546
Derivative financial assets		1,252,381		702,357
Investments in associates		0		0
Level 2 of fair value hierarchy [member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		0
Level 2 of fair value hierarchy [member] | Interest rate contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		198,697		220,027
Level 2 of fair value hierarchy [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		96,426		78,189
Derivative financial assets		1,053,684		482,330
Level 2 of fair value hierarchy [member] | Equity contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		968		357
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		927,767		2,970,348
Debt instruments at fair value through OCI		2,627,126		2,970,348
Equity instruments held		115		28,976
Derivative financial assets		1,356,482		781,649
Investment property		0		0
Investments in associates		0		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | PA Viva Malls [Member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		0		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Buildings [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		0		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Land [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		0		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Debt instruments at fair value through OCI
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments at fair value through OCI		1,699,359		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Trading equity securities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		115		28,976
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Equity securities held for sale [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		72,083		989,287
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		12,851		26,852
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		338,992		578,196
Debt instruments at fair value through OCI		186,250		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		420,524		1,275,031
Debt instruments at fair value through OCI		1,513,109		0
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		83,317		100,982
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		6,707		746
Level 2 of fair value hierarchy [member] | Recurring fair value measurement [member] | Option contract [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		6,707		746
Level 3 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Total		5,090,253		4,406,104
Equity instruments held		197,932		94,136
Derivative financial assets		196,848		236,167
Investments in associates		561,285		225,548
Level 3 of fair value hierarchy [member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		2,486
Level 3 of fair value hierarchy [member] | Interest rate contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		51,296		45,939
Level 3 of fair value hierarchy [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		197,919		94,121
Derivative financial assets		145,552		190,228
Level 3 of fair value hierarchy [member] | Equity contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		13		15
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		213,516		300,167
Debt instruments at fair value through OCI		213,516		300,167
Equity instruments held		1,539,600		1,343,604
Derivative financial assets		484,291		344,552
Investment property		1,732,873		1,657,409
Investments in associates		1,119,973		757,886
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | PA Viva Malls [Member] | Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		1,119,973		757,886
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Buildings [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		1,483,594		1,425,585
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Land [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Investment property		249,279		231,824
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Debt instruments at fair value through OCI
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments at fair value through OCI		0		0
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Trading equity securities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity instruments held		1,539,600		1,343,604
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Equity securities held for sale [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Equity securities - Assets held for sale		0		2,486
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		0		0
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		6,407		0
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		206,950		297,049
Debt instruments at fair value through OCI		0		0
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		0		0
Debt instruments at fair value through OCI		0		0
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Debt instruments held		159		3,118
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		89,511		14,249
Level 3 of fair value hierarchy [member] | Recurring fair value measurement [member] | Option contract [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial assets		$ 89,511		$ 14,249
[1]	Corresponds to the change in the commercial estimate of real estate due to the change in the consumer price index (IPC).
[2]	As of December 31, 2018 and 2017, the amount includes investments in associates at fair value for COP 1,119,973 and COP 757,886, respectively and investments in associates accounted for by the equity method for COP 590,996 and COP 569,724 respectively. See note 29 Fair value of assets and liabilities.
[3]	During 2018, the Bank increases its capital contribution in P.A Viva Malls by COP 274,951

FAIR VALUE OF ASSETS AND LIAB_5

FAIR VALUE OF ASSETS AND LIABILITIES (Details 2) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	$ (1,295,070)	$ (945,853)
Financial liabilities, at fair value	(57,585,666)	(54,782,101)
Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(306,600)	(147,446)
Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(958,881)	(781,464)
Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(29,589)	(16,943)
Recurring fair value measurement [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(1,295,070)	(945,853)
Financial liabilities, at fair value	(1,295,070)	(945,853)
Recurring fair value measurement [member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(306,600)	(147,446)
Recurring fair value measurement [member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(958,881)	(781,464)
Recurring fair value measurement [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(29,589)	(16,943)
Recurring fair value measurement [member] | Foreign exchange contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(299,015)	(142,976)
Recurring fair value measurement [member] | Foreign exchange contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(700,903)	(505,823)
Recurring fair value measurement [member] | Foreign exchange contracts [Member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(29,589)	(16,943)
Recurring fair value measurement [member] | Equity contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(7,585)	(4,470)
Recurring fair value measurement [member] | Interest rate contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(257,978)	(275,641)
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(3,887)	(9,347)
Financial liabilities, at fair value	(3,887)	(9,347)
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(3,887)	(9,347)
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Equity contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Interest rate contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(3,887)	(9,347)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(1,182,287)	(855,771)
Financial liabilities, at fair value	(1,182,287)	(855,771)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(250,169)	(126,379)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(902,529)	(712,449)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(29,589)	(16,943)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(242,844)	(122,424)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(654,093)	(459,789)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(29,589)	(16,943)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Equity contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(7,325)	(3,955)
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Interest rate contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(248,436)	(252,660)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(108,896)	(80,735)
Financial liabilities, at fair value	(108,896)	(80,735)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(56,431)	(21,067)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(52,465)	(59,668)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(56,171)	(20,552)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(46,810)	(46,034)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Foreign exchange contracts [Member] | Option contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	0	0
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Equity contracts [Member] | Forward contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	(260)	(515)
Recurring fair value measurement [member] | Level 3 of fair value hierarchy [member] | Interest rate contracts [Member] | Swap contract [member]
Disclosure of fair value of assets and liabilities [Line Items]
Derivative financial liabilities	$ (5,655)	$ (13,634)

FAIR VALUE OF ASSETS AND LIAB_6

FAIR VALUE OF ASSETS AND LIABILITIES (Details 3) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure of fair value of assets and liabilities [Line Items]
Loans and advances to customers and financial institutions, net	$ 163,583,285	$ 152,244,991
Total	220,113,618	203,908,211
Deposits by customers	(142,128,471)	(131,959,215)
Interbank deposits	(1,374,222)	(1,084,591)
Repurchase agreements and other similar secured borrowing	(2,315,555)	(3,236,128)
Borrowings from other financial institutions	(16,337,964)	(13,822,152)
Preferred shares	(583,997)	(582,985)
Debt securities in issue	(20,287,233)	(19,648,714)
Not measured at fair value in statement of financial position but for which fair value is disclosed [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	3,461,616	4,131,688
Loans and advances to customers and financial institutions, net	167,551,429	149,162,071
Total	171,013,045	153,293,759
Deposits by customers	(142,860,996)	(132,779,730)
Interbank deposits	(1,374,222)	(1,084,591)
Repurchase agreements and other similar secured borrowing	(2,315,555)	(3,236,128)
Borrowings from other financial institutions	(16,337,964)	(13,822,152)
Preferred shares	(602,597)	(662,999)
Debt securities in issue	(20,759,456)	(20,756,154)
Total	(184,250,790)	(172,341,754)
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	50,271	12,967
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	1,853,473	1,895,774
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	143,660	228,484
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	272,565	1,050,855
Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	1,141,647	943,608
Level 1 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	553,367	1,191,471
Loans and advances to customers and financial institutions, net	0	0
Total	553,367	1,191,471
Deposits by customers	0	0
Interbank deposits	0	0
Repurchase agreements and other similar secured borrowing	0	0
Borrowings from other financial institutions	0	0
Preferred shares	0	0
Debt securities in issue	(9,503,793)	(8,999,118)
Total	(9,503,793)	(8,999,118)
Level 1 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	36,847	0
Level 1 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	17,744	17,204
Level 1 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	107,959	194,606
Level 1 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	130,913	748,060
Level 1 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	259,904	231,601
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	618,242	915,722
Loans and advances to customers and financial institutions, net	0	0
Total	618,242	915,722
Deposits by customers	(30,490,414)	(30,440,868)
Interbank deposits	0	0
Repurchase agreements and other similar secured borrowing	0	0
Borrowings from other financial institutions	0	0
Preferred shares	0	0
Debt securities in issue	(8,486,088)	(9,534,766)
Total	(38,976,502)	(39,975,634)
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	13,424	12,967
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	386,396	528,395
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	23,375	21,871
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	141,652	302,795
Level 2 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	53,395	49,694
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	2,290,007	2,024,495
Loans and advances to customers and financial institutions, net	167,551,429	149,162,071
Total	169,841,436	151,186,566
Deposits by customers	(112,370,582)	(102,338,862)
Interbank deposits	(1,374,222)	(1,084,591)
Repurchase agreements and other similar secured borrowing	(2,315,555)	(3,236,128)
Borrowings from other financial institutions	(16,337,964)	(13,822,152)
Preferred shares	(602,597)	(662,999)
Debt securities in issue	(2,769,575)	(2,222,270)
Total	(135,770,495)	(123,367,002)
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	0	0
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by government entities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	1,449,333	1,350,175
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	12,326	12,007
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	0	0
Level 3 of fair value hierarchy [member] | Not measured at fair value in statement of financial position but for which fair value is disclosed [member] | Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets at amortised cost	$ 828,348	$ 662,313

FAIR VALUE OF ASSETS AND LIAB_7

FAIR VALUE OF ASSETS AND LIABILITIES (Details 4) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Non-recurring fair value measurement [member] | Non-current assets held for sale [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		$ 121,684	$ 5,454,631
Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Machinery [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		5,556	11,500
Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		92,052	23,854
Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Other Than Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		24,076	1,402
Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Collateralized Loans [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value	[1]	0	5,417,875
Level 1 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		9,502,125	7,584,761
Level 1 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 1 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Machinery [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 1 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 1 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Other Than Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 1 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Collateralized Loans [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 2 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		3,983,723	3,780,973
Level 2 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 2 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Machinery [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 2 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 2 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Other Than Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		0	0
Level 2 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Collateralized Loans [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value	[1]	0	0
Level 3 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		5,090,253	4,406,104
Level 3 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		121,684	5,454,631
Level 3 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Machinery [member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		5,556	11,500
Level 3 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		92,052	23,854
Level 3 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Real Estate For Other Than Residential Purposes [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value		24,076	1,402
Level 3 of fair value hierarchy [member] | Non-recurring fair value measurement [member] | Non-current assets held for sale [member] | Collateralized Loans [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Financial assets, at fair value	[1]	$ 0	$ 5,417,875
[1]	From January 1, 2018 onwards, the disclosure of collateralized loans is no longer required, due to the adoption of IFRS 9

FAIR VALUE OF ASSETS AND LIAB_8

FAIR VALUE OF ASSETS AND LIABILITIES (Details 5) - COP ($) $ in Millions		Dec. 31, 2018	Dec. 31, 2017
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates	[1]	$ 1,710,969	$ 1,327,610
Compania de Financiemiento TUYA S.A. [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair value of investments in associates for which there are quoted market prices		561,285	225,548
Level 1 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		0	0
Level 1 of fair value hierarchy [member] | Compania de Financiemiento TUYA S.A. [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair value of investments in associates for which there are quoted market prices		0	0
Level 2 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		0	0
Level 2 of fair value hierarchy [member] | Compania de Financiemiento TUYA S.A. [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair value of investments in associates for which there are quoted market prices		0	0
Level 3 of fair value hierarchy [member]
Disclosure of fair value of assets and liabilities [Line Items]
Investments in associates		561,285	225,548
Level 3 of fair value hierarchy [member] | Compania de Financiemiento TUYA S.A. [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair value of investments in associates for which there are quoted market prices		$ 561,285	$ 225,548
[1]	As of December 31, 2018 and 2017, the amount includes investments in associates at fair value for COP 1,119,973 and COP 757,886, respectively and investments in associates accounted for by the equity method for COP 590,996 and COP 569,724 respectively. See note 29 Fair value of assets and liabilities.

FAIR VALUE OF ASSETS AND LIAB_9

FAIR VALUE OF ASSETS AND LIABILITIES (Details 6) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
PA Viva Malls [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	$ 757,886	$ 388,595
Included in earnings	87,136	108,868
OCI	0	0
Purchases / reclassifications	274,951	262,918
Settlement	0	(2,495)
Prepaids	0	0
Transfers in to Level 3	0	0
Transfers out of Level 3	0	0
Balance as on December 31,	1,119,973	757,886
Total Investment In Associates [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	757,886	388,595
Included in earnings	87,136	108,868
OCI	0	0
Purchases / reclassifications	274,951	262,918
Settlement	0	(2,495)
Prepaids	0	0
Transfers in to Level 3	0	0
Transfers out of Level 3	0	0
Balance as on December 31,	1,119,973	757,886
Equity securities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	1,343,604	1,178,678
Included in earnings	131,446	107,848
OCI	38,648	26,736
Purchases / reclassifications	41,459	116,743
Settlement	(15,557)	(41,948)
Prepaids	0	0
Transfers in to Level 3	0	6,950
Transfers out of Level 3	0	(51,403)
Balance as on December 31,	1,539,600	1,343,604
Debt Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	300,167	420,028
Included in earnings	(58,525)	(74,627)
OCI	0	0
Purchases / reclassifications	34,691	58,315
Settlement	(66,532)	(69,868)
Prepaids	0	(72)
Transfers in to Level 3	10,365	0
Transfers out of Level 3	(6,650)	(33,609)
Balance as on December 31,	213,516	300,167
Equity securities held for sale [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	2,486	0
Included in earnings	0	0
OCI	0	0
Purchases / reclassifications	0	1,345
Settlement	(2,486)	0
Prepaids	0	0
Transfers in to Level 3	0	1,141
Transfers out of Level 3	0	0
Balance as on December 31,	0	2,486
Total equity securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	1,343,604	1,178,678
Included in earnings	131,446	107,848
OCI	38,648	26,736
Purchases / reclassifications	41,459	116,743
Settlement	(15,557)	(41,948)
Prepaids	0	0
Transfers in to Level 3	0	6,950
Transfers out of Level 3	0	(51,403)
Balance as on December 31,	1,539,600	1,343,604
Total equity securities assets held for sale [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	2,486	0
Included in earnings	0	0
OCI	0	0
Purchases / reclassifications	0	1,345
Settlement	(2,486)	0
Prepaids	0	0
Transfers in to Level 3	0	1,141
Transfers out of Level 3	0	0
Balance as on December 31,	0	2,486
Securities issued or secured by other financial entities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 3		30,951
Securities issued or secured by other financial entities [member] | Debt Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	297,049	405,099
Included in earnings	(54,595)	(70,416)
OCI	0	0
Purchases / reclassifications	29,149	52,316
Settlement	(64,014)	(58,999)
Prepaids	0	0
Transfers in to Level 3	5,394	0
Transfers out of Level 3	(6,033)	(30,951)
Balance as on December 31,	206,950	297,049
Derivative financial instruments [member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	263,817	396,318
Included in earnings	11,696	353
OCI	0	0
Purchases / reclassifications	248,183	264,827
Settlement	(116,542)	(395,986)
Prepaids	0	0
Transfers in to Level 3	(21,792)	(1,659)
Transfers out of Level 3	(9,967)	(36)
Balance as on December 31,	375,395	263,817
Derivative financial instruments [member] | Foreign exchange contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	232,012	378,385
Included in earnings	25,016	353
OCI	0	0
Purchases / reclassifications	230,869	231,260
Settlement	(107,890)	(378,053)
Prepaids	0	0
Transfers in to Level 3	(40,898)	103
Transfers out of Level 3	(9,108)	(36)
Balance as on December 31,	330,001	232,012
Derivative financial instruments [member] | Interest rate contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	32,305	17,596
Included in earnings	(13,320)	0
OCI	0	0
Purchases / reclassifications	17,561	34,067
Settlement	(9,152)	(17,596)
Prepaids	0	0
Transfers in to Level 3	19,106	(1,762)
Transfers out of Level 3	(859)	0
Balance as on December 31,	45,641	32,305
Derivative financial instruments [member] | Equity contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	(500)	337
Included in earnings	0	0
OCI	0	0
Purchases / reclassifications	(247)	(500)
Settlement	500	(337)
Prepaids	0	0
Transfers in to Level 3	0	0
Transfers out of Level 3	0	0
Balance as on December 31,	(247)	(500)
Corporate bonds [Member] | Debt Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	3,118	14,929
Included in earnings	(3,983)	(4,211)
OCI	0	0
Purchases / reclassifications	4,159	5,999
Settlement	(2,518)	(10,869)
Prepaids	0	(72)
Transfers in to Level 3	0	0
Transfers out of Level 3	(617)	(2,658)
Balance as on December 31,	159	3,118
Securities issued by the Colombian Government [Member] | Debt Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Balance as on January 1,	0
Included in earnings	53
OCI	0
Purchases / reclassifications	1,383
Settlement	0
Prepaids	0
Transfers in to Level 3	4,971
Transfers out of Level 3	0
Balance as on December 31,	$ 6,407	$ 0

FAIR VALUE OF ASSETS AND LIA_10

FAIR VALUE OF ASSETS AND LIABILITIES (Details 7) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 213,516
Interest rate, significant unobservable inputs, assets	11.19%	11.36%
Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value		$ 3,118
Effect on fairvalue of assets due to increase in basis point		3,292
Effect on fair value of assets due to decrease in basis point		2,985
Market comparable prices [member] | Price [Member] | PA Viva Malls [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 1,119,973	757,886
Debt Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value		300,167
Trading equity securities [member] | Market comparable prices [member] | Price [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	1,539,600	1,343,604
Equity securities held for sale [Member] | Market comparable prices [member] | Price [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	0	2,486
Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	206,950	$ 297,049
Corporate bonds [Member] | Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 159
Interest rate, significant unobservable inputs, assets	0.27%
Effect on fairvalue of assets due to increase in basis point	$ 159
Effect on fair value of assets due to decrease in basis point	160
Corporate bonds [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		0.81%
Option contract [member] | Black-Scholes [Member] | Recovery rate [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value		$ 14,249
Interest rate, significant unobservable inputs, assets		4.99%
Effect on fairvalue of assets due to increase in basis point		$ 14,142
Effect on fair value of assets due to decrease in basis point		14,280
Option contract [member] | Black-Scholes [Member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 89,511
Interest rate, significant unobservable inputs, assets	0.77%
Effect on fairvalue of assets due to increase in basis point	$ 88,834
Effect on fair value of assets due to decrease in basis point	89,876
Forward contract [member] | Discounted cash flow [member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 141,501	$ 73,069
Interest rate, significant unobservable inputs, assets	2.96%	2.41%
Effect on fairvalue of assets due to increase in basis point	$ 140,844	$ 72,886
Effect on fair value of assets due to decrease in basis point	155,113	73,263
Swap contract [member] | Discounted cash flow [member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 144,383	$ 176,499
Interest rate, significant unobservable inputs, assets	2.58%	1.95%
Effect on fairvalue of assets due to increase in basis point	$ 139,506	$ 170,701
Effect on fair value of assets due to decrease in basis point	$ 136,941	$ 182,343
TIPS, securities issued by other institutions one [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.69%	0.63%
Effect on fairvalue of assets due to increase in basis point	$ 160,056	$ 225,867
Effect on fair value of assets due to decrease in basis point	168,000	235,382
TIPS, securities issued by other institutions two [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value		236,236
Effect on fairvalue of assets due to increase in basis point		226,007
Effect on fair value of assets due to decrease in basis point		$ 235,228
TIPS, securities issued by other institutions two [Member] | Debt Securities [Member] | Discounted cash flow [member] | Liquidity risk premium [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 164,401
Interest rate, significant unobservable inputs, assets	3.58%	4.48%
Effect on fairvalue of assets due to increase in basis point	$ 160,162
Effect on fair value of assets due to decrease in basis point	167,881
TIPS, securities issued by other institutions TIPS three [Member] | Debt Securities [Member] | Discounted cash flow [member] | Prepayment speed [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Effect on fairvalue of assets due to increase in basis point	164,102	$ 231,087
Effect on fair value of assets due to decrease in basis point	163,602	230,152
Other bonds, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 34,961	$ 41,776
Interest rate, significant unobservable inputs, assets	0.60%	0.81%
Effect on fairvalue of assets due to increase in basis point	$ 33,700	$ 35,305
Effect on fair value of assets due to decrease in basis point	$ 36,299	38,282
Other bonds, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Liquidity risk premium [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	3.04%
Effect on fairvalue of assets due to increase in basis point	$ 33,142
Effect on fair value of assets due to decrease in basis point	35,678
Securitisations, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 5,394	$ 10,919
Interest rate, significant unobservable inputs, assets	2.04%	1.19%
Effect on fairvalue of assets due to increase in basis point	$ 5,376	$ 10,825
Effect on fair value of assets due to decrease in basis point	$ 5,421	11,014
Time deposit, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value		$ 8,118
Interest rate, significant unobservable inputs, assets	0.05%	1.81%
Effect on fairvalue of assets due to increase in basis point		$ 8,056
Effect on fair value of assets due to decrease in basis point		$ 8,184
Multilateral bonds [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 2,194
Interest rate, significant unobservable inputs, assets	0.05%
Effect on fairvalue of assets due to increase in basis point	$ 2,187
Effect on fair value of assets due to decrease in basis point	2,197
Governments bonds [Member] | Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 6,407
Interest rate, significant unobservable inputs, assets	0.32%
Effect on fairvalue of assets due to increase in basis point	$ 6,406
Effect on fair value of assets due to decrease in basis point	6,413
Total securities issued by foreign governments [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Fair Value	$ 6,407
Bottom of range [member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		0.11%
Bottom of range [member] | Corporate bonds [Member] | Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.27%
Bottom of range [member] | Option contract [member] | Black-Scholes [Member] | Recovery rate [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		0.06%
Bottom of range [member] | Option contract [member] | Black-Scholes [Member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.00%
Bottom of range [member] | Forward contract [member] | Discounted cash flow [member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.00%	0.00%
Bottom of range [member] | Swap contract [member] | Discounted cash flow [member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.00%	0.00%
Bottom of range [member] | TIPS, securities issued by other institutions one [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.16%	0.43%
Bottom of range [member] | TIPS, securities issued by other institutions two [Member] | Debt Securities [Member] | Discounted cash flow [member] | Liquidity risk premium [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.00%	0.00%
Bottom of range [member] | Other bonds, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.14%	0.11%
Bottom of range [member] | Other bonds, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Liquidity risk premium [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	2.80%
Bottom of range [member] | Securitisations, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	2.04%	2.24%
Bottom of range [member] | Time deposit, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		1.77%
Bottom of range [member] | Governments bonds [Member] | Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.32%
Top of range [member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		0.76%
Top of range [member] | Option contract [member] | Black-Scholes [Member] | Recovery rate [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		23.75%
Top of range [member] | Option contract [member] | Black-Scholes [Member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	18.81%
Top of range [member] | Forward contract [member] | Discounted cash flow [member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	21.55%	16.54%
Top of range [member] | Swap contract [member] | Discounted cash flow [member] | Credit spread [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	54.30%	21.31%
Top of range [member] | TIPS, securities issued by other institutions one [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.90%	10.35%
Top of range [member] | TIPS, securities issued by other institutions two [Member] | Debt Securities [Member] | Discounted cash flow [member] | Liquidity risk premium [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	9.38%	10.35%
Top of range [member] | Other bonds, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.89%	0.76%
Top of range [member] | Other bonds, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Liquidity risk premium [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	3.48%
Top of range [member] | Securitisations, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		3.43%
Top of range [member] | Time deposit, securities issued by other institutions [Member] | Debt Securities [Member] | Discounted cash flow [member] | Yield [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets		1.86%

FAIR VALUE OF ASSETS AND LIA_11

FAIR VALUE OF ASSETS AND LIABILITIES (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Dec. 31, 2017COP ($)
Disclosure of fair value of assets and liabilities [Line Items]
Ratio between monthly gross income and real estate value	0.76%	0.75%
Trading equity securities [member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 3 of fair value hierarchy, assets	$ 0	$ (51,403)
Unrealized gains and losses	$ 130,453	$ 116,051
Terminal rate [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	8.33%	8.55%
Direct capitalization-initial rate [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	8.05%	8.12%
Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	11.19%	11.36%
Securities issued by other financial institutions [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 3 of fair value hierarchy, assets		$ 30,951
Corporate bonds [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 2 into Level 1 of fair value hierarchy, assets held at end of reporting period	$ 2,700	2,700
Corporate bonds [Member] | Discounted cash flow [member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	0.27%
Equity Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 3 of fair value hierarchy, assets		51,403
Securities issued by the Colombian Government [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 1 into Level 2 of fair value hierarchy, assets held at end of reporting period	$ 826,618	826,618
Derrivative Foreign Exchange Contracts And Interest Rate Contracts [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Transfers out of Level 3 of fair value hierarchy, assets	21,792
Debt Securities [Member]
Disclosure of fair value of assets and liabilities [Line Items]
Unrealized gains and losses	$ 58,736	$ 73,505
Associates [member]
Disclosure of fair value of assets and liabilities [Line Items]
Interest rate, significant unobservable inputs, assets	11.83%	12.13%
Revenue multiple, significant unobservable inputs, assets	3.63	1.29

DISCONTINUED OPERATIONS (Detail

DISCONTINUED OPERATIONS (Details) - COP ($) $ in Millions	10 Months Ended	12 Months Ended
	Oct. 31, 2016	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Disclosure of discontinued operations [Line Items]
Interest income on loans		$ 7,322,453	$ 8,027,598		$ 7,952,627
Overnight and market funds		36,449	26,779		20,968
Interest and valuation on investment		384,610	525,423		542,946
Total interest and valuation		16,116,500	16,696,393		15,748,805	[1]
Interest expense		(5,670,216)	(6,232,986)	[2]	(6,053,100)	[1]
Net margin on financial instruments		384,610	525,423		544,184
Fees and other service income, net		2,781,203	2,545,999	[2]	2,330,963	[1]
Other operating income		61,768	232,185		203,115
Total operating expenses		(7,482,898)	(7,226,058)	[2]	(6,970,581)	[1]
Profit before tax		3,615,870	3,992,771	[2]	3,968,282	[1]
Income tax		829,435	1,238,598		1,176,832
Net profit of discontinued operations		$ 0	$ 0		$ 163,497
Discontinued operations [member]
Disclosure of discontinued operations [Line Items]
Interest income on loans	$ 408,233
Overnight and market funds	320
Interest and valuation on investment	1,246
Total interest and valuation	409,799
Interest expense	(106,110)
Net margin on financial instruments	303,689
Credit impairment charges on loans, net	(323,290)
Net interest and valuation income after provision for loans and financial leases	(19,601)
Fees and other service income, net	244,193
Other operating income	1,365
Total income, net	225,957
Total operating expenses	(221,310)
Profit before tax	4,647
Income tax	(2,961)
Net profit of discontinued operations	$ 1,686
[1]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2016 disclosed in the Bank’s annual report in 2016 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.
[2]	Some figures in the performance by operating segment disclosure for the year ended as of December 31, 2017 disclosed in the Bank’s annual report in 2017 have been changed due to an impact at the disaggregation level in the process of adopting IFRS 15. See adoption of new accounting standards in Note 32 Impacts on application of new standards.

DISCONTINUED OPERATIONS (Deta_2

DISCONTINUED OPERATIONS (Details Textual) - COP ($) $ in Millions	10 Months Ended	12 Months Ended
	Oct. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of discontinued operations [Line Items]
Investments in joint ventures		$ 438,610	$ 237,449
Profit (loss) from discontinued operations		0	0	$ 163,497
Tax expense relating to gain (loss) on discontinuance	$ 659
Deferred tax expense (income) recognised in profit or loss		$ 165,645
Percentage of voting equity interests acquired	50.00%
Financiamiento Tuya S.A. [Member]
Disclosure of discontinued operations [Line Items]
Consideration transferred, acquisition-date fair value	$ 79,017		$ 79,017
Discontinued operations [member]
Disclosure of discontinued operations [Line Items]
Profit (loss) from discontinued operations	1,686
Deferred tax expense (income) recognised in profit or loss	99,614
At fair value [member]
Disclosure of discontinued operations [Line Items]
Investments in joint ventures	343,108
At fair value [member] | Discontinued operations [member]
Disclosure of discontinued operations [Line Items]
Profit (loss) from discontinued operations	$ 263,770

RISK MANAGEMENT (Details)

RISK MANAGEMENT (Details) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Risk Management [Line Items]
Maximum exposure	$ 202,991,372	$ 199,665,846
Collateral		(73,989,985)
Net exposure	18,279,478	125,675,861
Allowance for loans, advances and lease losses	(10,235,831)	(8,223,103)	$ (8,223,103)	$ (5,248,755)
Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	190,853,563
Allowance for loans, advances and lease losses	(1,872,529)
Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	6,814,839
Allowance for loans, advances and lease losses	(1,246,444)
Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	5,322,970
Allowance for loans, advances and lease losses	(7,244,517)
Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	894,001	457,940
Net exposure	893,905	332,038
Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,639,949	1,520,313
Net exposure	1,639,949	1,520,313
Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	94,600,648	88,997,241
Allowance for loans, advances and lease losses	(239,720)
Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	31,993,381	27,646,114
Allowance for loans, advances and lease losses	(2,892,891)	(2,291,829)	$ (1,791,123)	$ (1,321,281)
Mortgages [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	22,870,685	20,512,208
Allowance for loans, advances and lease losses	(21,883)
Small Business Loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,156,198	1,063,580
Financial Leases [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	23,198,204	22,248,951
Loans and Advances [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	173,819,116	160,468,094
Collateral		(71,122,738)
Net exposure		89,345,356
Loans and Advances [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	153,894,099
Loans and Advances [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	7,712,055
Loans and Advances [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	12,212,962
Loans and Advances [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	94,600,648	88,997,241
Collateral		(42,593,800)
Net exposure		46,403,441
Loans and Advances [member] | Commercial Loans [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	83,632,770
Loans and Advances [member] | Commercial Loans [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	3,214,860
Loans and Advances [member] | Commercial Loans [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	7,753,018
Loans and Advances [member] | Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	31,993,381	27,646,114
Collateral		(5,915,201)
Net exposure		21,730,913
Loans and Advances [member] | Consumer loans [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	28,666,461
Loans and Advances [member] | Consumer loans [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,758,162
Loans and Advances [member] | Consumer loans [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,568,758
Loans and Advances [member] | Mortgages [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	22,870,685	20,512,208
Collateral		(18,991,957)
Net exposure		1,520,251
Loans and Advances [member] | Mortgages [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	20,280,416
Loans and Advances [member] | Mortgages [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,513,063
Loans and Advances [member] | Mortgages [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,077,206
Loans and Advances [member] | Small Business Loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,156,198	1,063,580
Collateral		(652,227)
Net exposure		411,353
Loans and Advances [member] | Small Business Loans [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	958,491
Loans and Advances [member] | Small Business Loans [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	80,805
Loans and Advances [member] | Small Business Loans [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	116,902
Loans and Advances [member] | Financial Leases [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	23,198,204	22,248,951
Collateral		(2,969,553)
Net exposure		19,279,398
Loans and Advances [member] | Financial Leases [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	20,355,961
Loans and Advances [member] | Financial Leases [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,145,165
Loans and Advances [member] | Financial Leases [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,697,078
Off-Balance Sheet Exposures [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	39,535,746	22,360,075
Collateral		0
Net exposure		22,360,075
Off-Balance Sheet Exposures [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	38,831,993
Off-Balance Sheet Exposures [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	349,228
Off-Balance Sheet Exposures [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	354,525
Off-Balance Sheet Exposures [member] | Financial guarantee contracts [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	5,661,661	6,701,643
Collateral		0
Net exposure		6,701,643
Off-Balance Sheet Exposures [member] | Financial guarantee contracts [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	5,641,482
Off-Balance Sheet Exposures [member] | Financial guarantee contracts [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	18,340
Off-Balance Sheet Exposures [member] | Financial guarantee contracts [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	1,839
Off-Balance Sheet Exposures [member] | Loan commitments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	33,874,085	15,658,432
Collateral		0
Net exposure		15,658,432
Off-Balance Sheet Exposures [member] | Loan commitments [member] | Stage One [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	33,190,511
Off-Balance Sheet Exposures [member] | Loan commitments [member] | Stage Two [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	330,888
Off-Balance Sheet Exposures [member] | Loan commitments [member] | Stage Three [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	352,686
Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	18,279,480	16,837,677
Collateral	(2,352,373)	(2,867,247)
Net exposure	15,927,108	13,970,430
Other Financial Instruments [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	15,745,530	14,859,423
Collateral	(2,352,276)	(2,741,345)
Net exposure	13,393,254	12,118,078
Other Financial Instruments [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure	894,001	457,940
Collateral	(97)	(125,902)
Net exposure	893,905	332,038
Other Financial Instruments [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure		1,520,314
Collateral	0	0
Net exposure	$ 1,639,949	$ 1,520,314

RISK MANAGEMENT (Details 1)

RISK MANAGEMENT (Details 1)	12 Months Ended
	Dec. 31, 2018
Business [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Companies with annual sales > = COP 20,000 M and < COP 80,000 M except for Banco Agrícola and BAM, which place borrowers with annual sales >= USD 5 M and < USD 25 M.
Business Construction [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Constructors who dedicate themselves professionally to the construction of buildings to be sold or rented as their main activity, with annual sales >= COP 20,000 M and <= COP 45,000 M. They must have more than 3 projects executed as previous experience.
Corporate Construction [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Constructors who dedicate themselves to the construction of buildings to be sold or rented as their main activity, with annual sales > COP 45,000 M. They must have more than 3 projects executed as previous experience.
Corporate [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Companies with annual sales >= COP 80,000 M. Banistmo places borrowers with annual sales >= USD 10 M. Banco Agrícola and BAM place borrowers with annual sales >= USD 25 M.
Institutional Financing [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Financial sector institutions.
Government [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Municipalities, districts, departments with their respective decentralized organizations and entities at the national level with incomes >= COP 20,000 M.
SME [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Annual sales < COP 20,000 M, with a classification between small, medium, large and plus except for Banistmo which includes borrowers < USD 10 M in annual sales, for Banco Agrícola and BAM < USD 5 M.
SME Construction [Member]
Disclosure Of Risk Management [Line Items]
Information about risk management strategy for rights that lessor retains in underlying assets	Constructors who dedicate themselves professionally to the construction of buildings to be sold or rented as their main activity with annual sales >= COP 380 M and <= COP 20,000 M. They must have more than 3 projects executed as previous experience.

RISK MANAGEMENT (Details 2)

RISK MANAGEMENT (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial assets	$ 17,361,475	$ 16,377,253
Allowance account for credit losses of financial assets	10,235,831	8,223,103	$ 8,223,103	$ 5,248,755
Small Business Loans [Member]
Financial assets	$ 17,452,183	$ 11,895,448
Percentage of Allowance Recorded on Financial Assets	20.67%	21.94%
Allowance account for credit losses of financial assets	$ 3,607,295	$ 2,610,446
Small Business Loans [Member] | Level 1 - Low Risk [Member]
Financial assets	$ 9,179,165	$ 4,938,711
Percentage of Allowance Recorded on Financial Assets	1.04%	2.32%
Allowance account for credit losses of financial assets	$ 95,896	$ 114,361
Small Business Loans [Member] | Level 2 - Medium Risk [Member]
Financial assets	$ 2,549,977	$ 1,641,169
Percentage of Allowance Recorded on Financial Assets	8.96%	4.98%
Allowance account for credit losses of financial assets	$ 228,461	$ 81,796
Small Business Loans [Member] | Level 3 - High Risk [Member]
Financial assets	$ 1,626,478	$ 3,806,554
Percentage of Allowance Recorded on Financial Assets	38.92%	33.21%
Allowance account for credit losses of financial assets	$ 633,101	$ 1,264,077
Small Business Loans [Member] | Level 4 - Default [Member]
Financial assets	$ 4,096,563	$ 1,509,014
Percentage of Allowance Recorded on Financial Assets	64.68%	76.22%
Allowance account for credit losses of financial assets	$ 2,649,837	$ 1,150,212

RISK MANAGEMENT (Details 3)

RISK MANAGEMENT (Details 3) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	$ 202,991,372	$ 199,665,846
Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	173,819,116	160,468,094
Real Estate and Residential [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	43,957,463	40,334,290
Goods Given in Real Estate Leasing [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	12,753,175	10,117,272
Goods Given in Leasing Other Than Real Estate [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	5,900,913	5,814,417
Stand by Letter of Credit [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	668,205	455,793
Security Deposits [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	916,225	1,136,326
Guarantee Fund [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	3,003,688	2,884,546
Sovereign of the Nation [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	12,710
Collection Rights [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	4,043,954	3,263,598
Other Collateral [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	8,894,582	7,103,786
Without Guarantee [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	93,680,911	89,345,356
Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	94,600,648	88,997,241
Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	94,600,648	88,997,241
Commercial Loans [member] | Real Estate and Residential [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	21,209,517	19,529,154
Commercial Loans [member] | Goods Given in Real Estate Leasing [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	7,725,197
Commercial Loans [member] | Goods Given in Leasing Other Than Real Estate [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	5,124,246
Commercial Loans [member] | Stand by Letter of Credit [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	667,976	455,793
Commercial Loans [member] | Security Deposits [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	470,400	779,008
Commercial Loans [member] | Guarantee Fund [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	2,595,913	2,583,354
Commercial Loans [member] | Sovereign of the Nation [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	12,710
Commercial Loans [member] | Collection Rights [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	3,992,592	3,220,882
Commercial Loans [member] | Other Collateral [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	4,118,947	3,163,456
Commercial Loans [member] | Without Guarantee [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	61,545,303	46,403,441
Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	31,993,381	27,646,114
Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	31,993,381	27,646,114
Consumer loans [member] | Real Estate and Residential [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,744,581	1,572,455
Consumer loans [member] | Goods Given in Real Estate Leasing [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Consumer loans [member] | Goods Given in Leasing Other Than Real Estate [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	112,724
Consumer loans [member] | Stand by Letter of Credit [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	229	0
Consumer loans [member] | Security Deposits [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	369,689	300,730
Consumer loans [member] | Guarantee Fund [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	138	147
Consumer loans [member] | Sovereign of the Nation [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Consumer loans [member] | Collection Rights [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	49,910	41,597
Consumer loans [member] | Other Collateral [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	4,713,359	3,887,548
Consumer loans [member] | Without Guarantee [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	25,115,475	21,730,913
Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	22,870,685	20,512,208
Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	22,870,685	20,512,208
Mortgages [Member] | Real Estate and Residential [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	20,720,459	18,959,433
Mortgages [Member] | Goods Given in Real Estate Leasing [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	243	0
Mortgages [Member] | Goods Given in Leasing Other Than Real Estate [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Mortgages [Member] | Stand by Letter of Credit [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Mortgages [Member] | Security Deposits [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Mortgages [Member] | Guarantee Fund [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Mortgages [Member] | Sovereign of the Nation [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Mortgages [Member] | Collection Rights [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Mortgages [Member] | Other Collateral [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	48,098	32,524
Mortgages [Member] | Without Guarantee [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	2,101,885	1,520,251
Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	23,198,204	22,248,951
Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	23,198,204	22,248,951
Lease receivables [member] | Real Estate and Residential [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	84	0
Lease receivables [member] | Goods Given in Real Estate Leasing [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	12,752,932	2,392,075
Lease receivables [member] | Goods Given in Leasing Other Than Real Estate [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	5,900,913	577,447
Lease receivables [member] | Stand by Letter of Credit [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Lease receivables [member] | Security Deposits [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Lease receivables [member] | Guarantee Fund [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	118,747	0
Lease receivables [member] | Sovereign of the Nation [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Lease receivables [member] | Collection Rights [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Lease receivables [member] | Other Collateral [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	20	31
Lease receivables [member] | Without Guarantee [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	4,425,508	19,279,398
Corporate loans [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,156,198	1,063,580
Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,156,198	1,063,580
Corporate loans [member] | Real Estate and Residential [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	282,822	273,248
Corporate loans [member] | Goods Given in Real Estate Leasing [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Corporate loans [member] | Goods Given in Leasing Other Than Real Estate [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Corporate loans [member] | Stand by Letter of Credit [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Corporate loans [member] | Security Deposits [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	76,136	56,588
Corporate loans [member] | Guarantee Fund [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	288,890	301,045
Corporate loans [member] | Sovereign of the Nation [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	0	0
Corporate loans [member] | Collection Rights [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,452	1,119
Corporate loans [member] | Other Collateral [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	14,158	20,227
Corporate loans [member] | Without Guarantee [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	$ 492,740	$ 411,353

RISK MANAGEMENT (Details 4)

RISK MANAGEMENT (Details 4) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 173,819,116	$ 160,468,094
Allowance for loans, advances and lease losses	(10,235,831)	(8,223,103)	$ (8,223,103)	$ (5,248,755)
Loans and advances to customers	163,583,285	152,244,991
Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		160,468,094
Commercial [member]
Disclosure Of Risk Management [Line Items]
Allowance for loans, advances and lease losses	(239,720)
Commercial [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	94,600,648	88,997,241	88,997,241
Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	55,562,618	58,661,267	58,661,267
SME Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,524,571	17,184,059	17,184,059
Other Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,513,459	13,151,915	13,151,915
Consumer [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,993,381	27,646,114
Allowance for loans, advances and lease losses	(2,892,891)	(2,291,829)	(1,791,123)	$ (1,321,281)
Consumer [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,993,381	27,646,114	27,646,114
Credit card Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	7,026,689	6,255,277	6,255,277
Vehicle Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,253,060	2,915,705	2,915,705
Payroll loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	7,451,381	6,970,783	6,970,783
Others Consumer Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	14,262,251	11,504,349	11,504,349
Mortgage [member]
Disclosure Of Risk Management [Line Items]
Allowance for loans, advances and lease losses	(21,883)
Mortgage [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,870,685	20,512,208	20,512,208
VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,778,067	5,491,926	5,491,926
Non-VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	17,092,618	15,020,282	15,020,282
Financial Leases [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	23,198,204	$ 22,248,951	22,248,951
Small business loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 1,156,198		$ 1,063,580

RISK MANAGEMENT (Details 5)

RISK MANAGEMENT (Details 5) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 173,819,116	$ 160,468,094
Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		160,468,094
Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	94,600,648	88,997,241	$ 88,997,241
Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	55,562,618	58,661,267	58,661,267
SME Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,524,571	17,184,059	17,184,059
Other Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,513,459	13,151,915	13,151,915
Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,993,381	27,646,114
Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,993,381	27,646,114	27,646,114
Credit card Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	7,026,689	6,255,277	6,255,277
Vehicle Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,253,060	2,915,705	2,915,705
Payroll loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	7,451,381	6,970,783	6,970,783
Others Consumer Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	14,262,251	11,504,349	11,504,349
Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,870,685	20,512,208	20,512,208
VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,778,067	5,491,926	5,491,926
Non-VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	17,092,618	15,020,282	15,020,282
Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	23,198,204	22,248,951	$ 22,248,951
Small Business Loans [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,156,198	1,063,580
Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,156,198	1,063,580
2019
Disclosure Of Risk Management [Line Items]
Debt instruments held	34,510,004	31,418,834
2019 | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,052,548	26,641,770
2019 | Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,569,691	17,054,923
2019 | SME Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,253,678	5,568,251
2019 | Other Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	9,229,179	4,018,596
2019 | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	749,322	1,393,022
2019 | Credit card Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	100,367	761,294
2019 | Vehicle Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	60,754	67,118
2019 | Payroll loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	62,657	52,087
2019 | Others Consumer Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	525,544	512,523
2019 | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	58,613	50,102
2019 | VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	11,056	12,238
2019 | Non-VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	47,557	37,864
2019 | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,393,428	3,101,344
2019 | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	256,093	232,596
Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	26,623,392	27,737,620
Later than one year and not later than three years [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	18,846,830	19,583,956
Later than one year and not later than three years [member] | Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	8,491,758	11,588,101
Later than one year and not later than three years [member] | SME Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,482,139	5,684,612
Later than one year and not later than three years [member] | Other Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,872,933	2,311,243
Later than one year and not later than three years [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,562,956	4,826,773
Later than one year and not later than three years [member] | Credit card Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	244,218	1,104,571
Later than one year and not later than three years [member] | Vehicle Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	610,398	718,610
Later than one year and not later than three years [member] | Payroll loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	624,660	692,079
Later than one year and not later than three years [member] | Others Consumer Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,083,680	2,311,513
Later than one year and not later than three years [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	175,572	148,851
Later than one year and not later than three years [member] | VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	51,768	40,182
Later than one year and not later than three years [member] | Non-VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	123,804	108,669
Later than one year and not later than three years [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,560,578	2,698,394
Later than one year and not later than three years [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	477,456	479,646
Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	33,245,511	29,715,679
Later than three years and not later than five years [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,216,100	13,561,261
Later than three years and not later than five years [member] | Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	11,335,723	8,533,725
Later than three years and not later than five years [member] | SME Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,774,471	2,973,761
Later than three years and not later than five years [member] | Other Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,105,906	2,053,775
Later than three years and not later than five years [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	12,069,707	12,035,699
Later than three years and not later than five years [member] | Credit card Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,073,539	2,384,220
Later than three years and not later than five years [member] | Vehicle Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,538,979	1,499,980
Later than three years and not later than five years [member] | Payroll loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,397,974	1,325,911
Later than three years and not later than five years [member] | Others Consumer Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	8,059,215	6,825,588
Later than three years and not later than five years [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	479,086	389,456
Later than three years and not later than five years [member] | VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	117,404	93,917
Later than three years and not later than five years [member] | Non-VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	361,682	295,539
Later than three years and not later than five years [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,260,513	3,546,370
Later than three years and not later than five years [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	220,105	182,893
Later than five years [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	79,440,209	71,595,961
Later than five years [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	28,485,170	29,210,254
Later than five years [member] | Corporate loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	19,165,446	21,484,518
Later than five years [member] | SME Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,014,283	2,957,435
Later than five years [member] | Other Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	6,305,441	4,768,301
Later than five years [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	14,611,396	9,390,620
Later than five years [member] | Credit card Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,608,565	2,005,192
Later than five years [member] | Vehicle Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,042,929	629,997
Later than five years [member] | Payroll loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,366,090	4,900,706
Later than five years [member] | Others Consumer Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,593,812	1,854,725
Later than five years [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,157,414	19,923,799
Later than five years [member] | VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,597,839	5,345,589
Later than five years [member] | Non-VIS Mortgage Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,559,575	14,578,210
Later than five years [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	13,983,685	12,902,843
Later than five years [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 202,544	$ 168,445

RISK MANAGEMENT (Details 6)

RISK MANAGEMENT (Details 6) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 173,819,116	$ 160,468,094
Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		160,468,094
Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	94,600,648	88,997,241	$ 88,997,241
Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,993,381	27,646,114
Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	31,993,381	27,646,114	27,646,114
Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,870,685	20,512,208	20,512,208
Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	23,198,204	22,248,951	$ 22,248,951
Small Business Loans [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,156,198	1,063,580
Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,156,198	1,063,580
Not later than one month [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	165,678,765	152,837,896
Not later than one month [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	90,804,138	85,747,936
Not later than one month [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	30,311,854	25,942,380
Not later than one month [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	21,121,205	18,751,121
Not later than one month [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,433,190	21,480,161
Not later than one month [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,008,378	916,298
Later than one month and not later than three months [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,025,373	2,341,709
Later than one month and not later than three months [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	452,890	570,412
Later than one month and not later than three months [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	701,314	764,098
Later than one month and not later than three months [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	612,480	752,336
Later than one month and not later than three months [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	209,840	215,685
Later than one month and not later than three months [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	48,849	39,178
Later than three months and not later than six months [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	610,434	581,763
Later than three months and not later than six months [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	152,877	130,613
Later than three months and not later than six months [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	238,540	236,509
Later than three months and not later than six months [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	148,786	140,188
Later than three months and not later than six months [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	54,029	61,700
Later than three months and not later than six months [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,202	12,753
Later than six months and not later than one year [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,720,962	2,863,922
Later than six months and not later than one year [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,387,364	1,573,899
Later than six months and not later than one year [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	638,868	584,789
Later than six months and not later than one year [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	388,653	396,227
Later than six months and not later than one year [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	245,974	238,030
Later than six months and not later than one year [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	60,103	70,977
Later than one year [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,783,582	1,842,804
Later than one year [member] | Commercial Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,803,379	974,381
Later than one year [member] | Consumer loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	102,805	118,338
Later than one year [member] | Mortgages [Member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	599,561	472,336
Later than one year [member] | Lease receivables [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	255,171	253,375
Later than one year [member] | Small Business Loans [member] | Loans and receivables, category [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 22,666	$ 24,374

RISK MANAGEMENT (Details 7)

RISK MANAGEMENT (Details 7) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 173,819,116	$ 160,468,094
Agriculture Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	6,352,153	5,705,196
Petroleum and Mining Products Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,264,605	975,118
Food, Beverages and Tobacco Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	6,185,707	6,449,403
Chemical Production Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,579,307	3,514,011
Government Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,537,077	3,932,565
Construction Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	20,021,566	20,628,926
Commerce and Tourism Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	24,569,254	23,635,564
Transport and Communications Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	9,196,984	8,910,674
Public Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	6,974,247	7,652,849
Consumer Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	56,700,035	48,086,544
Commercial Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	22,581,742	20,242,501
Other Industries and Manufactured Products Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	11,856,439	10,734,743
Local Market [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	123,458,300	117,257,613
Local Market [Member] | Agriculture Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,804,075	3,533,671
Local Market [Member] | Petroleum and Mining Products Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	1,082,816	909,127
Local Market [Member] | Food, Beverages and Tobacco Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,865,111	5,640,910
Local Market [Member] | Chemical Production Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,566,746	3,341,248
Local Market [Member] | Government Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,457,944	3,780,686
Local Market [Member] | Construction Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	14,508,354	15,464,605
Local Market [Member] | Commerce and Tourism Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,928,137	17,115,018
Local Market [Member] | Transport and Communications Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	8,331,727	8,307,712
Local Market [Member] | Public Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	6,007,483	5,180,634
Local Market [Member] | Consumer Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	35,886,645	31,367,376
Local Market [Member] | Commercial Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	17,041,170	16,248,665
Local Market [Member] | Other Industries and Manufactured Products Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,978,092	6,367,961
Foreign Market [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	50,360,816	43,210,481
Foreign Market [Member] | Agriculture Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,548,078	2,171,525
Foreign Market [Member] | Petroleum and Mining Products Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	181,789	65,991
Foreign Market [Member] | Food, Beverages and Tobacco Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	320,596	808,493
Foreign Market [Member] | Chemical Production Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	12,561	172,763
Foreign Market [Member] | Government Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	79,133	151,879
Foreign Market [Member] | Construction Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,513,212	5,164,321
Foreign Market [Member] | Commerce and Tourism Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	7,641,117	6,520,546
Foreign Market [Member] | Transport and Communications Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	865,257	602,962
Foreign Market [Member] | Public Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	966,764	2,472,215
Foreign Market [Member] | Consumer Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	20,813,390	16,719,168
Foreign Market [Member] | Commercial Services Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,540,572	3,993,836
Foreign Market [Member] | Other Industries and Manufactured Products Sector [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 5,878,347	$ 4,366,782

RISK MANAGEMENT (Details 8)

RISK MANAGEMENT (Details 8) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 173,819,116	$ 160,468,094
% Participation	100.00%	100.00%
Allowance for loans and advances and lease losses	$ 10,235,831	$ 8,223,103	$ 8,223,103	$ 5,248,755
% Participation	100.00%	100.00%
Colombia [Member]
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 119,674,770	$ 112,862,226
% Participation	68.85%	70.30%
Allowance for loans and advances and lease losses	$ 8,402,751	$ 7,164,085
% Participation	82.09%	87.10%
Panama [Member]
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 32,299,274	$ 28,722,853
% Participation	18.58%	17.90%
Allowance for loans and advances and lease losses	$ 910,268	$ 507,181
% Participation	8.89%	6.20%
EL SALVADOR [Member]
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 10,590,571	$ 9,120,415
% Participation	6.09%	5.70%
Allowance for loans and advances and lease losses	$ 465,122	$ 358,258
% Participation	4.54%	4.40%
Puerto rico [Member]
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 889,528	$ 847,767
% Participation	0.51%	0.50%
Allowance for loans and advances and lease losses	$ 29,041	$ 14,941
% Participation	0.29%	0.20%
Guatemala [Member]
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 10,352,272	$ 8,902,627
% Participation	5.96%	5.50%
Allowance for loans and advances and lease losses	$ 427,747	$ 177,895
% Participation	4.18%	2.10%
Other Countries [Member]
Disclosure Of Risk Management [Line Items]
Loans and advances	$ 12,701	$ 12,206
% Participation	0.01%	0.10%
Allowance for loans and advances and lease losses	$ 902	$ 743
% Participation	0.01%	0.00%

RISK MANAGEMENT (Details 9)

RISK MANAGEMENT (Details 9) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 173,819,116	$ 160,468,094
Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	137,163,996	140,558,163
Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	19,225,526	9,189,969
Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	5,200,350	3,844,704
Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,032	4,456,958
Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	12,225,212	2,418,300
Financial assets neither past due nor impaired [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		145,540,243
Financial assets neither past due nor impaired [member] | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		139,543,463
Financial assets neither past due nor impaired [member] | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		5,986,958
Financial assets neither past due nor impaired [member] | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		9,770
Financial assets neither past due nor impaired [member] | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		0
Financial assets neither past due nor impaired [member] | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		52
Financial assets past due but not impaired [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		1,490,761
Financial assets past due but not impaired [member] | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		224,259
Financial assets past due but not impaired [member] | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		1,265,787
Financial assets past due but not impaired [member] | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		715
Financial assets past due but not impaired [member] | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		0
Financial assets past due but not impaired [member] | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		0
Financial assets impaired [member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		7,297,653
Financial assets impaired [member] | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		783,333
Financial assets impaired [member] | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		1,848,716
Financial assets impaired [member] | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		2,932,948
Financial assets impaired [member] | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		1,167,928
Financial assets impaired [member] | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		564,728
Financial Assets Past Due And Impaired [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		6,139,437
Financial Assets Past Due And Impaired [Member] | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		7,108
Financial Assets Past Due And Impaired [Member] | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		88,508
Financial Assets Past Due And Impaired [Member] | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		901,271
Financial Assets Past Due And Impaired [Member] | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		3,289,030
Financial Assets Past Due And Impaired [Member] | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held		$ 1,853,520
Stage 1
Disclosure Of Risk Management [Line Items]
Debt instruments held	153,894,099
Stage 1 | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	135,000,193
Stage 1 | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	16,752,640
Stage 1 | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,141,266
Stage 1 | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Stage 1 | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Stage 2
Disclosure Of Risk Management [Line Items]
Debt instruments held	7,606,262
Stage 2 | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,058,010
Stage 2 | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	2,472,886
Stage 2 | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	3,059,084
Stage 2 | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	4,032
Stage 2 | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	12,250
Stage 3
Disclosure Of Risk Management [Line Items]
Debt instruments held	12,212,962
Stage 3 | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Stage 3 | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Stage 3 | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Stage 3 | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Stage 3 | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	12,212,962
Simplified methodology
Disclosure Of Risk Management [Line Items]
Debt instruments held	105,793
Simplified methodology | Normal Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	105,793
Simplified methodology | Acceptable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Simplified methodology | Appreciable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Simplified methodology | Significant Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	0
Simplified methodology | Unrecoverable Risk [Member]
Disclosure Of Risk Management [Line Items]
Debt instruments held	$ 0

RISK MANAGEMENT (Details 10)

RISK MANAGEMENT (Details 10) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Financial assets	$ 17,361,475	$ 16,377,253
Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	535,968
Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets	117,201
Gross carrying amount [member]
Disclosure Of Risk Management [Line Items]
Financial assets	1,581,268
Gross carrying amount [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	775,689
Gross carrying amount [member] | Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets	139,084
Gross carrying amount [member] | Financial assets individually assessed for credit losses [member]
Disclosure Of Risk Management [Line Items]
Financial assets	5,766,277	5,196,391
Gross carrying amount [member] | Financial assets individually assessed for credit losses [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	4,970,415	4,544,324
Gross carrying amount [member] | Financial assets individually assessed for credit losses [member] | Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets		10,839
Gross carrying amount [member] | Financial assets individually assessed for credit losses [member] | Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Gross carrying amount [member] | Financial assets individually assessed for credit losses [member] | Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Financial assets	795,862	641,228
Gross carrying amount [member] | Financial assets individually assessed for credit losses [member] | Small Business Loan [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Gross carrying amount [member] | Financial assets collectively assessed for credit losses [member]
Disclosure Of Risk Management [Line Items]
Financial assets	6,446,685	8,240,699
Gross carrying amount [member] | Financial assets collectively assessed for credit losses [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	2,782,603	3,546,504
Gross carrying amount [member] | Financial assets collectively assessed for credit losses [member] | Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	1,568,758	2,337,640
Gross carrying amount [member] | Financial assets collectively assessed for credit losses [member] | Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets	1,077,206	1,115,785
Gross carrying amount [member] | Financial assets collectively assessed for credit losses [member] | Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Financial assets	901,216	1,105,208
Gross carrying amount [member] | Financial assets collectively assessed for credit losses [member] | Small Business Loan [member]
Disclosure Of Risk Management [Line Items]
Financial assets	116,902	135,562
Accumulated impairment [member] | Financial assets individually assessed for credit losses [member]
Disclosure Of Risk Management [Line Items]
Financial assets		2,369,142
Accumulated impairment [member] | Financial assets individually assessed for credit losses [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets		2,059,356
Accumulated impairment [member] | Financial assets individually assessed for credit losses [member] | Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets		10,839
Accumulated impairment [member] | Financial assets individually assessed for credit losses [member] | Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Accumulated impairment [member] | Financial assets individually assessed for credit losses [member] | Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Financial assets		298,947
Accumulated impairment [member] | Financial assets individually assessed for credit losses [member] | Small Business Loan [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Accumulated impairment [member] | Financial assets collectively assessed for credit losses [member]
Disclosure Of Risk Management [Line Items]
Financial assets		3,978,036
Accumulated impairment [member] | Financial assets collectively assessed for credit losses [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets		1,782,385
Accumulated impairment [member] | Financial assets collectively assessed for credit losses [member] | Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets		1,403,499
Accumulated impairment [member] | Financial assets collectively assessed for credit losses [member] | Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets		489,414
Accumulated impairment [member] | Financial assets collectively assessed for credit losses [member] | Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Financial assets		202,940
Accumulated impairment [member] | Financial assets collectively assessed for credit losses [member] | Small Business Loan [member]
Disclosure Of Risk Management [Line Items]
Financial assets		$ 99,798
ECL | Financial assets individually assessed for credit losses [member]
Disclosure Of Risk Management [Line Items]
Financial assets	2,923,292
ECL | Financial assets individually assessed for credit losses [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	2,583,874
ECL | Financial assets individually assessed for credit losses [member] | Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Financial assets	339,418
ECL | Financial assets collectively assessed for credit losses [member]
Disclosure Of Risk Management [Line Items]
Financial assets	4,321,210
ECL | Financial assets collectively assessed for credit losses [member] | Commercial Loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	1,904,866
ECL | Financial assets collectively assessed for credit losses [member] | Consumer loans [member]
Disclosure Of Risk Management [Line Items]
Financial assets	1,383,265
ECL | Financial assets collectively assessed for credit losses [member] | Mortgages [Member]
Disclosure Of Risk Management [Line Items]
Financial assets	586,026
ECL | Financial assets collectively assessed for credit losses [member] | Lease receivables [member]
Disclosure Of Risk Management [Line Items]
Financial assets	367,072
ECL | Financial assets collectively assessed for credit losses [member] | Small Business Loan [member]
Disclosure Of Risk Management [Line Items]
Financial assets	$ 79,981

RISK MANAGEMENT (Details 12)

RISK MANAGEMENT (Details 12) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	$ 202,991,372	$ 199,665,846
Other Financial Instruments [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	18,279,480	16,837,676
Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	15,745,530	14,859,423
Debt Securities [Member] | Other Financial Instruments [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	15,745,531	14,859,423
Debt Securities [Member] | Low Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	12,994,432	12,475,888
Debt Securities [Member] | Medium Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,484	1,842,454
Debt Securities [Member] | High Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	412,834	336,054
Debt Securities [Member] | Without Rating [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	698,781	205,027
Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,949	1,520,313
Trading equity securities [member] | Other Financial Instruments [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,948	1,520,313
Trading equity securities [member] | Low Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	349,425	780,870
Trading equity securities [member] | Medium Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,749	0
Trading equity securities [member] | High Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	6,496	10,939
Trading equity securities [member] | Without Rating [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,282,278	728,504
Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	894,001	457,940
Derivatives [member] | Other Financial Instruments [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	894,001	457,940
Derivatives [member] | Low Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	867,639	349,375
Derivatives [member] | Medium Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	135	181
Derivatives [member] | High Risk [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	429	1,679
Derivatives [member] | Without Rating [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	$ 25,798	$ 106,705

RISK MANAGEMENT (Details 13)

RISK MANAGEMENT (Details 13) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	$ 202,991,372	$ 199,665,846
Financial assets pledged as collateral for liabilities or contingent liabilities	(2,827,817)	(2,741,344)
Net exposure	18,279,478	125,675,861
Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	18,279,480	16,837,676
Financial assets pledged as collateral for liabilities or contingent liabilities	(2,352,373)	(2,867,247)
Net exposure	15,927,108	13,970,429
Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	15,745,530	14,859,423
Financial assets pledged as collateral for liabilities or contingent liabilities	(2,352,276)	(2,741,345)
Net exposure	13,393,254	12,118,078
Debt Securities [Member] | Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	15,745,531	14,859,423
Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	894,001	457,940
Financial assets pledged as collateral for liabilities or contingent liabilities	(97)	(125,902)
Net exposure	893,905	332,038
Derivatives [member] | Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	894,001	457,940
Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,949	1,520,313
Financial assets pledged as collateral for liabilities or contingent liabilities	0	0
Net exposure	1,639,949	1,520,313
Trading equity securities [member] | Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,948	1,520,313
Net exposure	$ 1,639,948	$ 1,520,313

RISK MANAGEMENT (Details 14)

RISK MANAGEMENT (Details 14) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	$ 202,991,372	$ 199,665,846
Impairment loss on financial assets	8,727	1,946
Credit exposure	18,279,478	125,675,861
Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	15,745,530	14,859,423
Impairment loss on financial assets	14,783	1,198
Credit exposure	13,393,254	12,118,078
Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,949	1,520,313
Impairment loss on financial assets		0
Credit exposure	1,639,949	1,520,313
Financial assets at fair value through profit or loss, category [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,101,461	990,788
Impairment loss on financial assets	0	0
Credit exposure	1,101,461	990,788
Financial assets at fair value through other comprehensive income, category [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	538,487	529,525
Impairment loss on financial assets	0	0
Credit exposure	538,487	529,525
Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	18,279,480	16,837,676
Credit exposure	15,927,108	13,970,429
Other Financial Instruments [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	15,745,531	14,859,423
Other Financial Instruments [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	1,639,948	1,520,313
Impairment loss on financial assets	0
Credit exposure	1,639,948	1,520,313
Financial assets at fair value, class [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	12,251,872	10,701,855
Impairment loss on financial assets	3,053	0
Credit exposure	12,248,819	10,701,855
Financial assets at amortised cost, class [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum exposure to credit risk	3,493,657	4,158,766
Impairment loss on financial assets	11,730	1,198
Credit exposure	$ 3,481,928	$ 4,157,568

RISK MANAGEMENT (Details 15)

RISK MANAGEMENT (Details 15) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	$ 202,991,372	$ 199,665,846
Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	15,745,530	14,859,423
Debt Securities [Member] | Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	15,745,530	14,859,423
Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	1,639,949	1,520,313
Trading equity securities [member] | Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	1,639,949	1,520,313
Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	894,001	457,940
Derivatives [member] | Other Financial Instruments [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	894,002	457,940
North America [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	1,569,943	710,592
North America [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	1,472	8,658
North America [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	279,132	130,303
Latam [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	14,175,587	12,643,832
Latam [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	1,613,783	1,494,750
Latam [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	475,243	294,237
Europe [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	0	0
Europe [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	0	0
Europe [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	119,126	33,400
Others [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	0	1,504,999
Others [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	24,694	16,905
Others [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	20,501	0
Corporate Sector [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	3,179,751	3,020,087
Corporate Sector [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	1,064,268	1,340,844
Corporate Sector [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	276,721	95,138
Financial Sector [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	805,863	1,054,303
Financial Sector [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	543,256	91,904
Financial Sector [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	520,026	317,232
Funds and ETF Sector [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	2,159	0
Funds and ETF Sector [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	32,425	87,565
Funds and ETF Sector [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	97,254	45,570
Government Sectors [member] | Debt Securities [Member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	11,757,757	10,785,033
Government Sectors [member] | Trading equity securities [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	0	0
Government Sectors [member] | Derivatives [member]
Disclosure Of Risk Management [Line Items]
Maximum Exposure to Credit Risk	$ 0	$ 0

RISK MANAGEMENT (Details 16)

RISK MANAGEMENT (Details 16)	12 Months Ended
	Dec. 31, 2018
Band One [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	274.00%
Band One [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	274.00%
Band One [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	100.00%
Band One [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	0 years
Band One [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	29 days
Band Two [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	268.00%
Band Two [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	274.00%
Band Two [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	100.00%
Band Two [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	29 days
Band Two [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	3 months
Band Three [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	259.00%
Band Three [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	274.00%
Band Three [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	100.00%
Band Three [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	3 months
Band Three [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	6 months
Band Four [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	233.00%
Band Four [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	274.00%
Band Four [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	100.00%
Band Four [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	6 months
Band Four [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	1 year
Band Five [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	222.00%
Band Five [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	250.00%
Band Five [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	90.00%
Band Five [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	1 year
Band Five [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	1 year 10 months 24 days
Band Six [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	222.00%
Band Six [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	250.00%
Band Six [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	80.00%
Band Six [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	1 year 10 months 24 days
Band Six [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	2 years 9 months 18 days
Band Seven [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	211.00%
Band Seven [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	220.00%
Band Seven [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	75.00%
Band Seven [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	2 years 9 months 18 days
Band Seven [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	3 years 7 months 6 days
Band Eight [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	211.00%
Band Eight [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	220.00%
Band Eight [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	75.00%
Band Eight [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	3 years 7 months 6 days
Band Eight [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	4 years 3 months 18 days
Band Nine [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	172.00%
Band Nine [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	200.00%
Band Nine [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	70.00%
Band Nine [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	4 years 3 months 18 days
Band Nine [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	5 years 8 months 12 days
Band Ten [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	162.00%
Band Ten [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	170.00%
Band Ten [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	65.00%
Band Ten [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	5 years 8 months 12 days
Band Ten [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	7 years 3 months 18 days
Band Eleven [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	162.00%
Band Eleven [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	170.00%
Band Eleven [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	60.00%
Band Eleven [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	7 years 3 months 18 days
Band Eleven [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	9 years 3 months 18 days
Band Twelve [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	162.00%
Band Twelve [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	170.00%
Band Twelve [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	60.00%
Band Twelve [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	9 years 3 months 18 days
Band Twelve [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	10 years 7 months 6 days
Band Thirteen [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	162.00%
Band Thirteen [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	170.00%
Band Thirteen [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	60.00%
Band Thirteen [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	10 years 7 months 6 days
Band Thirteen [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	12 years
Band Fourteen [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	162.00%
Band Fourteen [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	170.00%
Band Fourteen [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	60.00%
Band Fourteen [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	12 years
Band Fourteen [Member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	20 years
Band Fifteen [Member] | Legal Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	162.00%
Band Fifteen [Member] | UVR [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	170.00%
Band Fifteen [Member] | Foreign Currency [Member]
Disclosure Of Risk Management [Line Items]
Changes in interest rates due to change in value of currency	60.00%
Band Fifteen [Member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Modified Duration	20 years

RISK MANAGEMENT (Details 17)

RISK MANAGEMENT (Details 17) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash	$ 15,833,017	$ 15,523,123
Money market transactions	2,897,793	2,642,521
Cash and cash equivalents	18,730,810	18,165,644	$ 20,460,245	$ 18,805,577
High quality liquid assets [Member]
Cash	15,370,693	14,793,855
Short-term investments, classified as cash equivalents	9,268,481	7,963,343
Other liquid assets [Member]
Money market transactions	1,867,576	1,617,158
Liquid assets [Member]
Cash and cash equivalents	$ 26,506,750	$ 24,374,356

RISK MANAGEMENT (Details 18)

RISK MANAGEMENT (Details 18)	12 Months Ended
	Dec. 31, 2018
United States Dollar [Member]
Disclosure Of Risk Management [Line Items]
Currency Risk, Sensitivity Factor	1249.00%
Euro [Member]
Disclosure Of Risk Management [Line Items]
Currency Risk, Sensitivity Factor	11.00%
Other currencies [Member]
Disclosure Of Risk Management [Line Items]
Currency Risk, Sensitivity Factor	13.02%
Equity and Fund Risk [Member]
Disclosure Of Risk Management [Line Items]
Currency Risk, Sensitivity Factor	14.70%

RISK MANAGEMENT (Details 19)

RISK MANAGEMENT (Details 19) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Value at risk	$ 1,447,384	$ 1,086,904
Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	1,108,052	877,348
Weighted Average [Member]
Disclosure Of Risk Management [Line Items]
Value at risk	1,250,084	1,011,173
Top of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	1,447,384	1,406,514
Interest Rate [member]
Disclosure Of Risk Management [Line Items]
Value at risk	249,070	283,548
Interest Rate [member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	204,478	269,572
Interest Rate [member] | Weighted Average [Member]
Disclosure Of Risk Management [Line Items]
Value at risk	241,602	289,811
Interest Rate [member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	317,524	303,876
Exchange Rate [member]
Disclosure Of Risk Management [Line Items]
Value at risk	909,648	559,362
Exchange Rate [member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	563,322	330,108
Exchange Rate [member] | Weighted Average [Member]
Disclosure Of Risk Management [Line Items]
Value at risk	712,435	488,395
Exchange Rate [member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	909,648	883,924
Share Price [member]
Disclosure Of Risk Management [Line Items]
Value at risk	91,847	70,758
Share Price [member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	91,847	70,758
Share Price [member] | Weighted Average [Member]
Disclosure Of Risk Management [Line Items]
Value at risk	103,127	76,632
Share Price [member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	112,372	84,059
Collective Portfolios [member]
Disclosure Of Risk Management [Line Items]
Value at risk	196,819	173,236
Collective Portfolios [member] | Bottom of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	187,842	34,558
Collective Portfolios [member] | Weighted Average [Member]
Disclosure Of Risk Management [Line Items]
Value at risk	192,920	156,335
Collective Portfolios [member] | Top of range [member]
Disclosure Of Risk Management [Line Items]
Value at risk	$ 198,227	$ 174,373

RISK MANAGEMENT (Details 20)

RISK MANAGEMENT (Details 20) $ in Millions, $ in Millions	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)
Disclosure Of Risk Management [Abstract]
Assets sensitivity 100 bps	$ 361,427	$ 39	$ 346,000	$ 38
Liabilities sensitivity 100 bps	185,477	36	180,714	30
Net interest income sensitivity 100 bps	$ 175,950	$ 3	$ 165,286	$ 8

RISK MANAGEMENT (Details 21)

RISK MANAGEMENT (Details 21) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Abstract]
Fair Value	$ 163,136	$ 146,667
Delta	147.00%	14.70%
Sensitivity	$ 23,981	$ 21,560

RISK MANAGEMENT (Details 22)

RISK MANAGEMENT (Details 22) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Abstract]
Net cash outflows into 30 days	$ 7,004,662	$ 5,122,512
Liquid Assets	$ 26,506,750	$ 24,374,356
Liquidity coverage ratio	372.48%	475.83%

RISK MANAGEMENT (Details 23)

RISK MANAGEMENT (Details 23) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Financial assets	$ 17,361,475	$ 16,377,253
2019
Disclosure Of Risk Management [Line Items]
Financial assets	6,476,981	5,625,195
Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	3,470,898	4,287,670
Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	1,988,638	2,676,615
Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	3,785,010	2,269,943
Cash and balances with central bank [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial assets	15,833,017	15,542,195
Cash and balances with central bank [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Cash and balances with central bank [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Cash and balances with central bank [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Interbank borrowings - Repurchase agreements [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial assets	2,965,646	2,805,467
Interbank borrowings - Repurchase agreements [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Interbank borrowings - Repurchase agreements [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Interbank borrowings - Repurchase agreements [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets		0
Financial assets investments [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial assets	7,512,098	6,706,487
Financial assets investments [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	4,557,121	5,258,546
Financial assets investments [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	2,585,777	3,107,856
Financial assets investments [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	3,608,511	1,931,710
Loans and advances to customers [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial assets	61,653,720	54,997,084
Loans and advances to customers [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	52,485,542	50,519,957
Loans and advances to customers [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	33,393,032	29,659,278
Loans and advances to customers [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	59,347,861	50,569,611
Derivative financial instruments [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial assets	1,073,804	804,392
Derivative financial instruments [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	174,475	176,490
Derivative financial instruments [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	486,746	405,710
Derivative financial instruments [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial assets	$ 247,268	$ 233,762

RISK MANAGEMENT (Details 24)

RISK MANAGEMENT (Details 24) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	$ 143,020,904	$ 132,205,292
Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	25,784,187	21,229,325
Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	14,136,767	16,275,892
Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	9,936,069	12,375,087
Demand deposit from customers [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	85,275,330	77,997,629
Demand deposit from customers [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	0	0
Demand deposit from customers [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	0	0
Demand deposit from customers [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	0	0
Time deposits from customers [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	39,104,963	37,755,690
Time deposits from customers [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	14,120,231	12,085,796
Time deposits from customers [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	5,096,152	6,053,016
Time deposits from customers [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	2,037,330	2,134,245
Interbank deposits - Repurchase agreements [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	3,132,911	3,861,258
Interbank deposits - Repurchase agreements [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	531,734	524,880
Interbank deposits - Repurchase agreements [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	0	0
Interbank deposits - Repurchase agreements [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	0	0
Borrowings from other financial institutions [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	11,149,381	8,709,585
Borrowings from other financial institutions [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	2,952,158	2,824,456
Borrowings from other financial institutions [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	1,158,784	1,379,194
Borrowings from other financial institutions [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	1,844,290	1,961,015
Debt securities in issue [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	3,721,909	3,210,313
Debt securities in issue [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	8,078,228	5,676,708
Debt securities in issue [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	7,489,901	8,460,302
Debt securities in issue [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	5,813,722	8,050,023
Derivative financial instruments [Member] | 2019
Disclosure Of Risk Management [Line Items]
Financial liabilities	636,410	670,817
Derivative financial instruments [Member] | Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	101,836	117,485
Derivative financial instruments [Member] | Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	391,930	383,380
Derivative financial instruments [Member] | Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial liabilities	$ 240,727	$ 229,804

RISK MANAGEMENT (Details 25)

RISK MANAGEMENT (Details 25) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Disclosure Of Risk Management [Line Items]
Financial guarantees	$ 5,253,375	$ 6,701,643
2019
Disclosure Of Risk Management [Line Items]
Financial guarantees	3,370,845	5,137,205
Later than one year and not later than three years [member]
Disclosure Of Risk Management [Line Items]
Financial guarantees	1,426,992	1,224,061
Later than three years and not later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial guarantees	277,710	149,238
Later than five years [member]
Disclosure Of Risk Management [Line Items]
Financial guarantees	$ 177,828	$ 191,139

RISK MANAGEMENT (Details 26)

RISK MANAGEMENT (Details 26) - Regulatory capital requirements [Member] - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Regulatory Capital and Capital Adequacy Ratios
Basic Ordinary Equity	$ 23,965,972	$ 22,221,965
Deductions Basic Ordinary Equity	(4,251,247)	(4,189,222)
Total Basic Ordinary Equity	19,714,725	18,032,743
Additional Equity	6,704,144	7,143,524
Total Regulatory Capital	$ 26,418,869	$ 25,176,267
Primary capital to risk-weighted assets (Tier I)	10.05%	10.15%
Secondary capital to risk-weighted assets (Tier II)	3.42%	4.03%
Technical capital to risk-weighted assets	13.47%	14.18%

RISK MANAGEMENT (Details 27)

RISK MANAGEMENT (Details 27) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Unrated credit exposures	$ 2,006,858	$ 1,040,235
Credit exposure	18,279,478	125,675,861
Sovereign Risk [Member]
Rated credit exposures	6,879,344	6,939,944
AAA Credit Rating [Member]
Rated credit exposures	4,304,103	3,901,870
AA+Credit Rating [Member]
Rated credit exposures	398,479	190,464
AACredit Rating [Member]
Rated credit exposures	22,615	91,636
AA-Credit Rating [Member]
Rated credit exposures	180,757	60,422
A+ Credit Rating [Member]
Rated credit exposures	23,800	96,822
A Credit Rating [Member]
Rated credit exposures	328,597	86,607
A- Credit Rating [Member]
Rated credit exposures	163,235	580,138
BBB+ Credit Rating [Member]
Rated credit exposures	73,101	236,613
BBB Credit Rating [Member]
Rated credit exposures	1,133,247	1,129,321
BBB- Credit Rating [Member]
Rated credit exposures	704,216	292,296
Otros Credit Rating [Member]
Rated credit exposures	$ 2,061,126	$ 2,191,307

RISK MANAGEMENT (Details 28)

RISK MANAGEMENT (Details 28) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Financial assets pledged as collateral for liabilities or contingent liabilities	$ 2,827,817	$ 2,741,344
Debt Securities [Member]
Financial assets pledged as collateral for liabilities or contingent liabilities	$ 2,352,276	$ 2,741,345
Description of terms and conditions of financial assets pledged as collateral for liabilities or contingent liabilities	Government bonds (TES) and term deposits	Government Bonds (TES)
Derivatives [member]
Financial assets pledged as collateral for liabilities or contingent liabilities	$ 97	$ 125,902
Description of terms and conditions of financial assets pledged as collateral for liabilities or contingent liabilities	Cash	Cash
Trading equity securities [member]
Financial assets pledged as collateral for liabilities or contingent liabilities	$ 0	$ 0

RISK MANAGEMENT (Details 29)

RISK MANAGEMENT (Details 29) - COP ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Financial assets	$ 17,361,475	$ 16,377,253
Allowance account for credit losses of financial assets	10,235,831	8,223,103	$ 8,223,103	$ 5,248,755
Financial assets that are individually determined to be impaired, fair value of collateral held and other credit enhancements	3,676,251
Commercial Loans [Member]
Financial assets	535,968
Allowance account for credit losses of financial assets	239,720
Financial assets that are individually determined to be impaired, fair value of collateral held and other credit enhancements	2,528,495
Mortgages [Member]
Financial assets	117,201
Allowance account for credit losses of financial assets	21,883
Financial assets that are individually determined to be impaired, fair value of collateral held and other credit enhancements	173,482
Financial leases [Member]
Financial assets	464,514
Allowance account for credit losses of financial assets	990,970	$ 807,923	$ 567,046	$ 579,151
Financial assets that are individually determined to be impaired, fair value of collateral held and other credit enhancements	974,274
Gross carrying amount [member]
Financial assets	1,581,268
Gross carrying amount [member] | Commercial Loans [Member]
Financial assets	775,689
Gross carrying amount [member] | Mortgages [Member]
Financial assets	139,084
Gross carrying amount [member] | Financial leases [Member]
Financial assets	$ 666,495

RISK MANAGEMENT (Details 30)

RISK MANAGEMENT (Details 30) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)
One Percentage Increase In Fiscal Balance Current Account And Inflation [Member]
Decrease In Expected Credit Loss Due to One Percentage Increase in GDP Growth Rate	$ (30,929)
Increase Decrease In Expected Credit Loss When No Change in GDP Growth Rate	(12,204)
Increase In Expected Credit Loss Due to One Percentage decrease in GDP Growth Rate	22,749
No Change In Fiscal Balance Current Account And Inflation [Member]
Decrease In Expected Credit Loss Due to One Percentage Increase in GDP Growth Rate	(18,726)
Increase Decrease In Expected Credit Loss When No Change in GDP Growth Rate	0
Increase In Expected Credit Loss Due to One Percentage decrease in GDP Growth Rate	34,953
One Percentage Decrease In Fiscal Balance Current Account And Inflation [Member]
Decrease In Expected Credit Loss Due to One Percentage Increase in GDP Growth Rate	(5,841)
Increase Decrease In Expected Credit Loss When No Change in GDP Growth Rate	12,885
Increase In Expected Credit Loss Due to One Percentage decrease in GDP Growth Rate	$ 47,838

RISK MANAGEMENT (Details Textua

RISK MANAGEMENT (Details Textual) - COP ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Risk Management [Line Items]
Repayment term	5 to 30 years
Transfer of loans and goods to foreclosed assets and inventories	$ 521,718,000	$ 331,057,000	$ 487,122,000
Concentration of Number of economic groups	20
Credit exposure	$ 18,279,478,000	125,675,861,000
Percentage of debt securities not in default	100.00%
Percentage of derivatives not in default	99.80%
Disclosure of term of exposure	10 days
Confidence level	99.00%
Holding period	10 days
Time duration	250 days
Interest income sensitivity in basis points	50
Net interest income sensitivity due to increase in basis points	$ 175,950
Percentage of decrease in Market value of investments	11.23%
Decrease in market value of investments	$ 146,667,000,000
Market value of investments	$ 163,136,000,000
Contractual maturities liabilities duration	30 days
Duration of contract maturity of mortgage loans	15 and 30 years
Percentage decrease in market value	14.70%
Decrease in structural equity investments market value	$ 23,981,000,000
Structural equity investment market value	$ 139,155,000,000	$ 163,136,000,000
Increase in Moderate Growth Rate of Loan Portfolio	12.07%
Increase in 30-Day Past Due Loan Ratio	4.33%	4.49%
Increase in Rate of Commercial Loans		5.89%
Thirty Day Past Due Loan Ratio of Commercial Loans		3.56%
Increase in Rate of Consumer Loans		15.72%
Thirty Day Past Due Loan Ratio of Consumer Loans		4.93%
Mortgage Loans		$ 22,870,000,000
Increase in Rate of Mortgage Loans		11.50%
Thirty Day Past Due Loan Ratio of Mortgage Loans		6.95%
Corporate loans		$ 117,798,000,000
Consumer loans		31,993,000,000
Small Business Loan		$ 1,156,000,000
Increase in Rate of Small Business Loans		8.71%
Thirty Day Past Due Loan Ratio of Small Business Loans		12.01%
Description of estimated Impact of expected credit loss by applying the optimistic and pessimistic scenarios	Additionally, the Bank has estimated the impact on the expected loss of applying the optimistic and pessimistic scenarios with a weight of 100% to each one; As a result, for the optimistic scenario there is a decrease of COP -315,483 in the expected losses; whereas for the pessimistic scenario there is an increase of COP 392,654. This result includes the base and alternative scenarios of the individual methodology.
Capital Adequacy Requirements Description	minimum solvency ratio (Basic Solvency Risk Index, Tier 1) above 4.5%, and a total solvency risk index (Tier 2) greater than or equal to 9.0%
Financial assets	$ 17,361,475,000	$ 16,377,253,000
Individually Impaired loan	5,800,000
Optimistic Scenario [Member]
Risk Management [Line Items]
Increase Decrease In Expected Credit Loss	315,483,000
Pessimistic Scenario [Member]
Risk Management [Line Items]
Increase Decrease In Expected Credit Loss	$ 392,654,000
Currency risk [member]
Risk Management [Line Items]
Percentage of increase in total market risk	33.00%
Risk exposure associated with instruments sharing characteristic	$ 1,086,904,000,000	1,447,384,000,000
United states dollars [Member]
Risk Management [Line Items]
Percentage of increase in net position of currency	131.82%
Economic group [Member]
Risk Management [Line Items]
Credit exposure	$ 20,372,000,000	$ 19,223,000,000

IMPACTS ON APPLICATION OF NEW_3

IMPACTS ON APPLICATION OF NEW STANDARDS (Details) $ in Millions		12 Months Ended
		Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017COP ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016COP ($)	Dec. 31, 2015COP ($)
Cash and cash equivalents		$ 18,730,810		$ 18,165,644		$ 20,460,245	$ 18,805,577
Financial assets		17,361,475		16,377,253
Derivative financial assets		1,843,708		1,134,372
Deposits from customers		142,128,471		131,959,215
Deposits from banks		1,374,222		1,084,591
Repurchase agreements and cash collateral on securities lent		2,315,555		3,236,128
Derivative financial liabilities		1,295,070		945,853
Other Liabilities		$ 6,768,253		5,796,482
Other Liability [Member]
Type Of Original Classification Under IFRS 9
Type Of New Classification Under IFRS 9
Accordance with IFRS 9 [Member]
Financial assets		$ 186,919,032
Debt Securities [Member]
Financial assets		15,721,527		14,859,423
Trading equity securities [member]
Financial assets		$ 1,639,948		1,517,830
Financial assets at amortised cost, category [member]
Type Of Original Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Customer Deposits [Member]
Type Of Original Classification Under IFRS 9		Amortized cost
Type Of New Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Repos [Member]
Type Of Original Classification Under IFRS 9		Amortized cost
Type Of New Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Inter bank [Member]
Type Of Original Classification Under IFRS 9		Amortized cost
Type Of New Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Financial liabilities [member]
Type Of Original Classification Under IFRS 9		Amortized cost
Type Of New Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		Amortized cost
Cash and cash equivalents		$ 18,165,644
Financial assets at amortised cost, category [member] | Debt Securities [Member]
Type Of Original Classification Under IFRS 9		Amortized cost
Type Of New Classification Under IFRS 9		Amortized cost
Financial assets		$ 3,481,928		4,157,568
Financial assets at amortised cost, category [member] | Debt Securities Two [Member]
Type Of Original Classification Under IFRS 9	[1]	Amortized cost
Financial assets at amortised cost, category [member] | Debt Securities Three [Member]
Type Of Original Classification Under IFRS 9	[2]	Amortized cost
Financial assets at amortised cost, category [member] | Debt Securities Four [Member]
Type Of Original Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Debt Securities Four [Member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		Amortized cost
Financial assets		$ 3,121,981
Financial assets at amortised cost, category [member] | Trading equity securities [member]
Financial assets		$ 0
Financial assets at amortised cost, category [member] | Loans and financial leases [Member]
Type Of Original Classification Under IFRS 9		Amortized cost
Financial assets at amortised cost, category [member] | Loans and financial leases [Member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		Amortized cost
Derivative financial assets		$ 151,209,930
Financial assets at fair value through profit or loss, category [member]
Type Of Original Classification Under IFRS 9		FVTPL
Financial assets at fair value through profit or loss, category [member] | Debt Securities [Member]
Type Of Original Classification Under IFRS 9	[3]	FVTPL
Financial assets		$ 8,909,861		10,701,855
Financial assets at fair value through profit or loss, category [member] | Debt Securities one [Member]
Type Of Original Classification Under IFRS 9		FVTPL
Financial assets at fair value through profit or loss, category [member] | Debt Securities one [Member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		FVTPL
Financial assets		$ 8,596,947
Financial assets at fair value through profit or loss, category [member] | Debt Securities Three [Member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9	[2]	FVTPL
Financial assets	[2]	$ 180,976
Financial assets at fair value through profit or loss, category [member] | Trading equity securities [member]
Type Of Original Classification Under IFRS 9		FVTPL
Financial assets	[4]	$ 1,101,461		988,455
Financial assets at fair value through profit or loss, category [member] | Trading equity securities [member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		FVTPL
Financial assets		$ 988,455
Financial assets at fair value through profit or loss, category [member] | Derivatives [member]
Type Of Original Classification Under IFRS 9		FVTPL
Type Of New Classification Under IFRS 9		FVTPL
Financial assets at fair value through profit or loss, category [member] | Derivatives [member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		FVTPL
Derivative financial assets		$ 1,134,372
Financial assets at fair value through other comprehensive income, category [member] | Debt Securities [Member]
Financial assets	[5]	$ 3,329,738
Financial assets at fair value through other comprehensive income, category [member] | Debt Securities [Member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9	[3]	FVOCI
Financial assets	[3]	$ 2,106,468
Financial assets at fair value through other comprehensive income, category [member] | Debt Securities Two [Member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9	[1]	FVOCI
Financial assets	[1]	$ 884,884
Financial assets at fair value through other comprehensive income, category [member] | Trading equity securities [member]
Type Of Original Classification Under IFRS 9		FVOCI
Financial assets		$ 538,487		$ 529,375
Financial assets at fair value through other comprehensive income, category [member] | Trading equity securities [member] | Accordance with IFRS 9 [Member]
Type Of New Classification Under IFRS 9		FVOCI
Financial assets		$ 529,375
Previously stated [member]
Financial assets		187,922,260	$ 14,859,423
Other Liabilities		151,789
Financial liabilities		170,848,442
Previously stated [member] | Other Liability [Member]
Other Liabilities		151,789
Previously stated [member] | Financial assets at amortised cost, category [member]
Cash and cash equivalents		18,165,644
Financial assets			4,157,568		$ 4,157,568
Previously stated [member] | Financial assets at amortised cost, category [member] | Customer Deposits [Member]
Deposits from customers		131,959,215
Previously stated [member] | Financial assets at amortised cost, category [member] | Repos [Member]
Repurchase agreements and cash collateral on securities lent		3,236,128
Previously stated [member] | Financial assets at amortised cost, category [member] | Inter bank [Member]
Deposits from banks		1,084,591
Previously stated [member] | Financial assets at amortised cost, category [member] | Financial liabilities [member]
Current financial liabilities		13,822,152
Previously stated [member] | Financial assets at amortised cost, category [member] | Debt Securities [Member]
Current financial liabilities		19,648,714
Previously stated [member] | Financial assets at amortised cost, category [member] | Debt Securities Two [Member]
Financial assets	[1]	850,535
Previously stated [member] | Financial assets at amortised cost, category [member] | Debt Securities Three [Member]
Financial assets	[2]	176,229
Previously stated [member] | Financial assets at amortised cost, category [member] | Debt Securities Four [Member]
Financial assets		3,130,804
Previously stated [member] | Financial assets at amortised cost, category [member] | Loans and financial leases [Member]
Derivative financial assets		152,244,991
Previously stated [member] | Financial assets at fair value through profit or loss, category [member]
Financial assets			10,701,855		10,701,855
Previously stated [member] | Financial assets at fair value through profit or loss, category [member] | Debt Securities [Member]
Financial assets	[3]	2,105,230
Previously stated [member] | Financial assets at fair value through profit or loss, category [member] | Debt Securities one [Member]
Financial assets		8,596,625
Previously stated [member] | Financial assets at fair value through profit or loss, category [member] | Trading equity securities [member]
Financial assets		988,455
Previously stated [member] | Financial assets at fair value through profit or loss, category [member] | Derivatives [member]
Derivative financial assets		1,134,372
Derivative financial liabilities		945,853
Previously stated [member] | Financial assets at fair value through other comprehensive income, category [member]
Financial assets			0		0
Previously stated [member] | Financial assets at fair value through other comprehensive income, category [member] | Trading equity securities [member]
Financial assets		529,375
Increase (decrease) due to changes in accounting policy [member]
Cash and cash equivalents		0
Financial assets		(1,003,228)
Financial liabilities		(44,120)
Increase (decrease) due to changes in accounting policy [member] | Customer Deposits [Member]
Deposits from customers		0
Increase (decrease) due to changes in accounting policy [member] | Repos [Member]
Repurchase agreements and cash collateral on securities lent		0
Increase (decrease) due to changes in accounting policy [member] | Inter bank [Member]
Deposits from banks		0
Increase (decrease) due to changes in accounting policy [member] | Other Liability [Member]
Other Liabilities		11,790
Increase (decrease) due to changes in accounting policy [member] | Financial liabilities [member]
Current financial liabilities		0
Increase (decrease) due to changes in accounting policy [member] | Debt Securities [Member]
Financial assets	[3]	1,238
Current financial liabilities		(55,910)
Increase (decrease) due to changes in accounting policy [member] | Debt Securities one [Member]
Financial assets		322
Increase (decrease) due to changes in accounting policy [member] | Debt Securities Two [Member]
Financial assets	[1]	34,349
Increase (decrease) due to changes in accounting policy [member] | Debt Securities Three [Member]
Financial assets	[2]	4,747
Increase (decrease) due to changes in accounting policy [member] | Debt Securities Four [Member]
Financial assets		(8,823)
Increase (decrease) due to changes in accounting policy [member] | Trading equity securities [member]
Financial assets		0
Increase (decrease) due to changes in accounting policy [member] | Trading Equity Securities One [Member]
Financial assets		0
Increase (decrease) due to changes in accounting policy [member] | Derivatives [member]
Derivative financial assets		0
Derivative financial liabilities		0
Increase (decrease) due to changes in accounting policy [member] | Loans and financial leases [Member]
Derivative financial assets		(1,035,061)
Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Financial assets			14,891,256
Other Liabilities		139,999
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Accordance with IFRS 9 [Member]
Financial liabilities		170,892,562
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Accordance with IFRS 9 [Member] | Customer Deposits [Member]
Deposits from customers		131,959,215
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Accordance with IFRS 9 [Member] | Repos [Member]
Repurchase agreements and cash collateral on securities lent		3,236,128
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Accordance with IFRS 9 [Member] | Inter bank [Member]
Deposits from banks		1,084,591
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Accordance with IFRS 9 [Member] | Other Liability [Member]
Other Liabilities		139,999
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Accordance with IFRS 9 [Member] | Financial liabilities [member]
Current financial liabilities		13,822,152
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Debt Securities [Member] | Accordance with IFRS 9 [Member]
Current financial liabilities		19,704,624
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Derivatives [member] | Accordance with IFRS 9 [Member]
Derivative financial liabilities		$ 945,853
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Financial assets at amortised cost, category [member]
Financial assets			3,121,981		4,148,745
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Financial assets at fair value through profit or loss, category [member]
Financial assets			8,777,923		10,702,177
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Financial assets at fair value through other comprehensive income, category [member]
Financial assets			$ 2,991,352		$ 0
[1]	Bonds issued by the Government of Guatemala which amounted to COP 558,516 and term deposit certificates in foreign currency to COP 292,019 have been reclassified from the category Amortized cost to, FVOCI. The business model on which such instruments are now held achieves its objective not only collecting the contractual cash flows, but both collecting contractual cash flows and selling them in the market.
[2]	Bonds issued by the Guatemalan Government which amounted to COP 166,608 and corporate bonds of other Guatemalan issuers to COP 9,621 have been reclassified from amortized cost to FVTPL. Those instruments are now managed for selling them in the market, instead of obtaining the contractual cash flows.
[3]	LETES (El Salvador Public Treasury Bills) issued by the Government of El Salvador which amounted to COP 129,962, bonds issued by the Government of Guatemala to COP 206,031, bonds issued by The Republic of Panama to COP 923,787 and treasury bonds of the United States of America to COP (475,428), among others, were reclassified from fair value through profit or loss (FVTPL) to fair value through other comprehensive income (FVOCI). These investments are now held within a business model whose objective is achieved by both collecting contractual cash flows and selling them in the market.
[4]	The growth is mainly due to the increase of the Sura Assets Management fair value by COP 69,162 at the end of the year 2018. In accordance with the price conditions agreed with Caisse de Dépôt et Placement du Québec (CDPQ) for the sale of this investment, the total Bank’s shareholding will be sold for (USD 135,173) COP 439,279.
[5]	For further information, see classification under IFRS 9, as described in Note 2.D Significant accounting policies.

IMPACTS ON APPLICATION OF NEW_4

IMPACTS ON APPLICATION OF NEW STANDARDS (Details 1) - 12 months ended Dec. 31, 2018 $ in Millions	COP ($)	USD ($)
Beginning balance	$ 16,377,253
Ending Balance	17,361,475
Remeasurement [Member]
Reclassification of financial assets out of measured at fair value through profit or loss into measured at fair value through other comprehensive income		$ 0
Reclassification of financial assets out of measured at fair value through profit or loss into measured at amortised cost		4,747
Fair value of financial assets reclassified out of fair value through profit or loss category into amortised cost or fair value through other comprehensive income category		0
Reclassification of financial assets out of measured at fair value through other comprehensive income into measured at amortised cost		0
Reclassification of financial assets out of measured at fair value through other comprehensive income into measured at fair value through profit or loss		1,238
Fair value of financial assets reclassified out of fair value through other comprehensive income category into amortised cost category		34,349
Ending Balance		31,833
Reclassification [Member]
Reclassification of financial assets out of measured at fair value through profit or loss into measured at fair value through other comprehensive income		(2,105,230)
Reclassification of financial assets out of measured at fair value through profit or loss into measured at amortised cost		176,229
Fair value of financial assets reclassified out of fair value through profit or loss category into amortised cost or fair value through other comprehensive income category		(176,229)
Reclassification of financial assets out of measured at fair value through other comprehensive income into measured at amortised cost		(850,535)
Reclassification of financial assets out of measured at fair value through other comprehensive income into measured at fair value through profit or loss		2,105,230
Fair value of financial assets reclassified out of fair value through other comprehensive income category into amortised cost category		850,535
Ending Balance		0
Previously stated [member]
Ending Balance	$ 187,922,260	14,859,423
Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Reclassification of financial assets out of measured at fair value through profit or loss into measured at fair value through other comprehensive income		(2,105,230)
Reclassification of financial assets out of measured at fair value through profit or loss into measured at amortised cost		180,976
Fair value of financial assets reclassified out of fair value through profit or loss category into amortised cost or fair value through other comprehensive income category		(176,229)
Reclassification of financial assets out of measured at fair value through other comprehensive income into measured at amortised cost		(850,535)
Reclassification of financial assets out of measured at fair value through other comprehensive income into measured at fair value through profit or loss		2,106,468
Fair value of financial assets reclassified out of fair value through other comprehensive income category into amortised cost category		884,884
Ending Balance		14,891,256
Financial assets at fair value through profit or loss, category [member] | Remeasurement [Member]
Beginning balance		322
Ending Balance		5,069
Financial assets at fair value through profit or loss, category [member] | Reclassification [Member]
Beginning balance		0
Ending Balance		(1,929,001)
Financial assets at fair value through profit or loss, category [member] | Previously stated [member]
Beginning balance		10,701,855
Ending Balance		10,701,855
Financial assets at fair value through profit or loss, category [member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Beginning balance		10,702,177
Ending Balance		8,777,923
Financial assets at amortised cost, category [member] | Remeasurement [Member]
Beginning balance		(8,823)
Ending Balance		(8,823)
Financial assets at amortised cost, category [member] | Reclassification [Member]
Beginning balance		0
Ending Balance		(1,026,764)
Financial assets at amortised cost, category [member] | Previously stated [member]
Beginning balance		4,157,568
Ending Balance		4,157,568
Financial assets at amortised cost, category [member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Beginning balance		4,148,745
Ending Balance		3,121,981
Financial assets at fair value through other comprehensive income, category [member] | Remeasurement [Member]
Beginning balance		0
Ending Balance		35,587
Financial assets at fair value through other comprehensive income, category [member] | Reclassification [Member]
Beginning balance		0
Ending Balance		2,955,765
Financial assets at fair value through other comprehensive income, category [member] | Previously stated [member]
Beginning balance		0
Ending Balance		0
Financial assets at fair value through other comprehensive income, category [member] | Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Beginning balance		0
Ending Balance		$ 2,991,352

IMPACTS ON APPLICATION OF NEW_5

IMPACTS ON APPLICATION OF NEW STANDARDS (Details 2) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Impairment loss on financial assets	$ 8,727	$ 1,946
Other liabilities	6,768,253	$ 5,796,482
Previously stated [member]
Impairment loss on financial assets	8,223,103
Other liabilities	151,789
Total allowance for credit losses	8,376,093
Previously stated [member] | Financial assets at amortised cost, category [member]
Impairment loss on financial assets	1,201
Previously stated [member] | Financial assets measured at fair value through other comprehensive income, category [member]
Impairment loss on financial assets	0
Remeasurement [Member]
Impairment loss on financial assets	1,035,061
Other liabilities	(11,790)
Total allowance for credit losses	1,037,799
Remeasurement [Member] | Financial assets at amortised cost, category [member]
Impairment loss on financial assets	8,823
Remeasurement [Member] | Financial assets measured at fair value through other comprehensive income, category [member]
Impairment loss on financial assets	5,705
Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Impairment loss on financial assets	9,258,164
Other liabilities	139,999
Total allowance for credit losses	9,413,892
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Financial assets at amortised cost, category [member]
Impairment loss on financial assets	10,024
Increase (decrease) due to changes in accounting policy required by IFRSs [member] | Financial assets measured at fair value through other comprehensive income, category [member]
Impairment loss on financial assets	$ 5,705

IMPACTS ON APPLICATION OF NEW_6

IMPACTS ON APPLICATION OF NEW STANDARDS (Details 3) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2018COP ($)	Dec. 31, 2018USD ($)	Dec. 31, 2016COP ($)	Dec. 31, 2015COP ($)
Disclosure Of Impacts On Application Of New Standards [Line Items]
Balance	$ 24,429,550
Effect of adoption of new accounting standards (Note 32 Impacts on application of new standards)	(749,781)
Shareholders' equity as of January 1, 2018 (adjusted)	24,429,550		$ 26,655,225		$ 22,476,980	$ 20,407,919
IFRS 9 Update [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Balance		$ 3,568,182
Expected Credit Loss On Financial Assets Recognized debt instruments at FVOCI		(4,837)
Expected Credit Loss On Financial Assets Recognized		(8,736)
Investment In Debt Instruments Reclassification Adjustment	24,126
Expected Credit Loss On Financial Assets Recognized loans and financial leases		(948,785)
Expected Credit Loss On Financial Assets Recognized Financial guarantees and loan commitments		16,990
Modification Of Debt Recognized	(55,910)
Deferred tax relating to items credited (charged) directly to equity	245,512
Shareholders' equity as of January 1, 2018 (adjusted)		$ 3,568,182		$ 2,836,542
Non-controlling interests [member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Balance	1,316,586
Effect of adoption of new accounting standards (Note 32 Impacts on application of new standards)	(18,141)
Shareholders' equity as of January 1, 2018 (adjusted)	1,316,586		1,806,305		1,209,397	1,128,470
Retained Earnings [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Balance	3,568,182
Effect of adoption of new accounting standards (Note 32 Impacts on application of new standards)	(731,640)
Shareholders' equity as of January 1, 2018 (adjusted)	$ 3,568,182		$ 3,906,945		$ 3,515,329	$ 3,753,427

IMPACTS ON APPLICATION OF NEW_7

IMPACTS ON APPLICATION OF NEW STANDARDS (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2018COP ($)	Jan. 01, 2019COP ($)	Jan. 01, 2019USD ($)	Dec. 31, 2017COP ($)
Disclosure Of Impacts On Application Of New Standards [Line Items]
Liabilities	$ 193,458,393			$ 179,478,661
Retained earnings	3,906,945			3,568,182
Net deferred tax liabilities	1,318,295			$ 1,440,198
Adoption Of IFRS 9 [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Net deferred tax liabilities			$ 120,000
Adoption Of IFRS 9 [Member] | Bottom of range [member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Right-of-use assets		$ 1,980,830
Lease liabilities		2,393,442
Retained earnings		309,815
Adoption Of IFRS 9 [Member] | Top of range [member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Right-of-use assets		2,174,830
Lease liabilities		2,587,442
Retained earnings		503,815
Increase (decrease) due to changes in accounting policy and corrections of prior period errors [member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Liabilities		$ 55,910
Certificate Of Deposit [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Reclassification of financial assets out of measured at amortised cost into measured at fair value through other comprehensive income	292,019
Securities Issued By El Salvador Government [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Fair value of financial assets reclassified out of fair value through profit or loss and into fair value through other comprehensive income, initial application of IFRS 9	129,962
Securities Issued By Guatemala Government [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Fair value of financial assets reclassified out of fair value through profit or loss and into fair value through other comprehensive income, initial application of IFRS 9	206,031
Reclassification of financial assets out of measured at amortised cost into measured at fair value through other comprehensive income	558,516
Reclassification of financial assets out of measured at amortised cost into measured at fair value through profit or loss	166,608
Securities Issued By Republic of Panama [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Fair value of financial assets reclassified out of fair value through profit or loss and into fair value through other comprehensive income, initial application of IFRS 9	923,787
Securities Issued By Republic of Panama Government [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Fair value of financial assets reclassified out of fair value through profit or loss and into fair value through other comprehensive income, initial application of IFRS 9	475,428
Corporate bonds [Member]
Disclosure Of Impacts On Application Of New Standards [Line Items]
Reclassification of financial assets out of measured at amortised cost into measured at fair value through profit or loss	$ 9,621

SUBSEQUENT EVENTS (Details Text

SUBSEQUENT EVENTS (Details Textual) $ in Millions	Mar. 29, 2019USD ($)	Jan. 16, 2019	Dec. 31, 2018COP ($)	Dec. 31, 2017COP ($)	Oct. 31, 2016
Disclosure of subsequent events [Line Items]
Issued capital			$ 480,914	$ 480,914
Percentage of voting equity interests acquired					50.00%
Arval Relsa [Member]
Disclosure of subsequent events [Line Items]
Issued capital	$ 21,893
Percentage of voting equity interests acquired		100.00%