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Fair Value of Financial Assets and Liabilities: (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of redesignated financial assets and liabilities [text block] [Abstract]

Schedule of fair value of Financial Assets/Liabilities on the balance sheet

		Level 1								Level 2								Level 3								Total
		2019				2020				2019				2020				2019				2020				2019				2020
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Financial Assets
Financial assets held-for-trading
From the Chilean government and Central Bank			93,032				75,701				1,030,657				4,083,591				—				—				1,123,689				4,159,292
Other instruments issued in Chile			3,272				1,002				316,971				99,302				55,094				5,494				375,337				105,798
Instruments issued abroad			—				164				—				—				—				—				—				164
Mutual fund investments			373,329				400,902				—				—				—				—				373,329				400,902
Total			469,633				477,769				1,347,628				4,182,893				55,094				5,494				1,872,355				4,666,156
Derivative Instruments
Derivative contracts for trading purposes
Forwards			—				—				956,632				551,964				—				—				956,632				551,964
Swaps			—				—				1,761,952				2,013,247				—				—				1,761,952				2,013,247
Call options			—				—				4,961				269				—				—				4,961				269
Put options			—				—				1,076				1,462				—				—				1,076				1,462
Futures			—				—				—				—				—				—				—				—
Subtotal			—				—				2,724,621				2,566,942				—				—				2,724,621				2,566,942
Hedge derivative contracts
Fair value hedge (Swaps)			—				—				32				—				—				—				32				—
Cash flow hedge (Swaps)			—				—				61,562				51,062				—				—				61,562				51,062
Subtotal			—				—				61,594				51,062				—				—				61,594				51,062
Total			—				—				2,786,215				2,618,004				—				—				2,786,215				2,618,004
Financial assets at fair value through other comprehensive income
Debt instruments (1):
From the Chilean government and Central Bank			66,953				—				42,109				163,600				—				—				109,062				163,600
Instruments issued in Chile			—				—				1,221,862				860,327				7,069				36,596				1,228,931				896,923
Instruments issued abroad			—				—				19,853				—				—				—				19,853				—
Subtotal			66,953				—				1,283,824				1,023,927				7,069				36,596				1,357,846				1,060,523
Equity instruments:
Instruments issued in Chile			—				—				7,446				6,869				—				—				7,446				6,869
Instruments issued abroad			955				670				—				—				96				91				1,051				761
Subtotal			955				670				7,446				6,869				96				91				8,497				7,630
Total			67,908				670				1,291,270				1,030,796				7,165				36,687				1,366,343				1,068,153
Total Financial Assets			537,541				478,439				5,425,113				7,831,693				62,259				42,181				6,024,913				8,352,313
Financial liabilities
Derivative contracts for trading purposes
Forwards			—				—				673,932				637,164				—				—				673,932				637,164
Swaps			—				—				2,097,022				2,130,393				—				—				2,097,022				2,130,393
Call options			—				—				1,529				306				—				—				1,529				306
Put options			—				—				2,209				2,099				—				—				2,209				2,099
Futures			—				—				—				—				—				—				—				—
Subtotal			—				—				2,774,692				2,769,962				—				—				2,774,692				2,769,962
Hedge derivative contracts
Fair value hedge (Swaps)			—				—				9,286				6,519				—				—				9,286				6,519
Cash flow hedge (Swaps)			—				—				34,443				65,172				—				—				34,443				65,172
Subtotal			—				—				43,729				71,691				—				—				43,729				71,691
Total Financial liabilities			—				—				2,818,421				2,841,653				—				—				2,818,421				2,841,653

Schedule of reconciliation between the beginning and ending balances of instruments classified as Level 3, whose fair value is reflected in the financial statements

		2019
		Balance as of January 1, 2019				Gain (Loss) Recognized in Income (1)				Gain (Loss) Recognized in Equity (2)				Purchases				Sales				Transfer from Level 1 and 2				Transfer to Level 1 and 2				Balance as of December 31, 2019
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Financial Assets
Financial assets held-for-trading:
Other instruments issued in Chile			20,866				(38	)			—				48,017				(26,504	)			13,368				(615	)			55,094
Subtotal			20,866				(38	)			—				48,017				(26,504	)			13,368				(615	)			55,094
Financial assets at fair value through OCI:
Debt instruments:
Other instruments issued in Chile			23,021				968				(517	)			—				(18,177	)			1,774				—				7,069
Equity instruments:
Instruments issued abroad			89				—				7				—				—				—				—				96
Subtotal			23,110				968				(510	)			—				(18,177	)			1,774				—				7,165
Total			43,976				930				(510	)			48,017				(44,681	)			15,142				(615	)			62,259

		2020
		Balance as of January 1, 2020				Gain (Loss) Recognized in Income (1)				Gain (Loss) Recognized in Equity (2)				Purchases				Sales				Transfer from Level 1 and 2				Transfer to Level 1 and 2				Balance as of December 31, 2020
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Financial Assets
Financial assets held-for-trading:
Other instruments issued in Chile			55,094				(708	)			—				49,424				(98,316	)			—				—				5,494
Subtotal			55,094				(708	)			—				49,424				(98,316	)			—				—				5,494
Financial assets at fair value through OCI:
Debt instruments:
Other instruments issued in Chile			7,069				323				(647	)			71,539				(70,897	)			29,209				—				36,596
Equity instruments:
Instruments issued abroad			96				—				(5	)			—				—				—				—				91
Subtotal			7,165				323				(652	)			71,539				(70,897	)			29,209				—				36,687
Total			62,259				(385	)			(652	)			120,963				(169,213	)			29,209				—				42,181

Schedule of reconciliation between the beginning and ending balances of instruments classified as Level 3, whose fair value is reflected in the financial statements

		Transfers from level 1 to level 2
Financial assets		2019
		MCh$
Financial assets held-for-trading instruments
From the Chilean Government and Central Bank			84
Instruments issued abroad
From the Chilean Government and Central Bank			—

		Transfers from level 2 to level 1
Financial assets		2019
		MCh$
Financial assets held-for-trading instruments
From the Chilean Government and Central Bank			17
Instruments issued abroad
From the Chilean Government and Central Bank			—

		Transfers from level 1 to level 2
Financial assets		2020
		MCh$
Financial assets held-for-trading instruments
From the Chilean Government and Central Bank			425
Financial assets at fair value through OCI
From the Chilean Government and Central Bank			—

		Transfers from level 2 to level 1
Financial assets		2020
		MCh$
Financial assets held-for-trading instruments
From the Chilean Government and Central Bank			109
Financial assets at fair value through OCI
From the Chilean Government and Central Bank			—

Schedule of impact on the fair value of Level 3 financial instruments using alternative assumptions that are reasonably possible

		As of December 31, 2019								As of December 31, 2020
		Level 3				Sensitivity to changes in key assumptions of models				Level 3				Sensitivity to changes in key assumptions of models
Financial Assets		MCh$				MCh$				MCh$				MCh$
Financial assets held-for-trading
Other instruments issued in Chile			55,094				(466	)			5,494				(8	)
Subtotal			55,094				(466	)			5,494				(8	)
Financial assets at fair value through OCI
Debt instrument:
Other instruments issued in Chile			7,069				(86	)			36,596				(525	)
Equity instrument:
Instruments issued abroad			96				—				91				—
Subtotal			7,165				(86	)			36,687				(525	)
Total			62,259				(552	)			42,181				(533	)

Schedule of fair values of the financial assets and liabilities that are not recorded at fair value in the statement of financial position

		Book Value								Fair Value
		2019				2020				2019				2020
		MCh$				MCh$				MCh$				MCh$
Assets
Cash and due from banks			2,392,166				2,560,216				2,392,166				2,560,216
Transactions in the course of collection			331,420				163,252				331,420				163,252
Investments under resale agreements			142,329				76,407				142,329				76,407
Subtotal			2,865,915				2,799,875				2,865,915				2,799,875
Loans and advances to banks
Domestic banks			149,974				259,788				149,974				259,788
Central Bank of Chile			630,053				2,380,033				630,053				2,380,033
Foreign banks			360,054				299,377				358,542				297,778
Subtotal			1,140,081				2,939,198				1,138,569				2,937,599
Loans to Customers at amortized cost
Commercial loans			16,039,411				17,120,207				15,988,330				16,968,143
Residential mortgage loans			9,163,019				9,352,720				9,888,506				10,075,011
Consumer loans			4,181,609				3,628,656				4,215,509				3,711,582
Subtotal			29,384,039				30,101,583				30,092,345				30,754,736
Total			33,390,035				35,840,656				34,096,829				36,492,210
Liabilities
Current accounts and other demand deposits			11,326,133				15,167,229				11,326,133				15,167,229
Transactions in the course of payment			98,869				882,944				98,869				882,944
Obligations under repurchase agreements			308,734				288,917				308,734				288,917
Saving accounts and time deposits			10,856,618				8,899,541				10,795,125				8,885,015
Borrowings from financial institutions			1,563,277				3,669,753				1,555,129				3,415,959
Other financial obligations			156,229				191,713				160,361				217,311
Subtotal			24,309,860				29,100,097				24,244,351				28,857,375
Debt issued
Letters of credit for residential purposes			10,229				6,532				11,081				7,201
Letters of credit for general purposes			669				254				725				280
Bonds			7,912,621				7,700,402				8,340,272				8,390,594
Subordinated bonds			889,895				886,407				1,004,621				1,004,196
Subtotal			8,813,414				8,593,595				9,356,699				9,402,271
Total			33,123,274				37,693,692				33,601,050				38,259,646

Schedule of figures by hierarchy, for financial assets/liabilities not measured at fair value on the balance sheet

		Level 1								Level 2								Level 3								Total
		Estimated Fair Value								Estimated Fair Value								Estimated Fair Value								Estimated Fair Value
		2019				2020				2019				2020				2019				2020				2019				2020
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Assets
Cash and due from banks			2,392,166				2,560,216				—				—				—				—				2,392,166				2,560,216
Transactions in the course of collection			331,420				163,252				—				—				—				—				331,420				163,252
Investments under resale agreements			142,329				76,407				—				—				—				—				142,329				76,407
Subtotal			2,865,915				2,799,875				—				—				—				—				2,865,915				2,799,875
Loans and advances to banks
Domestic banks			149,974				259,788				—				—				—				—				149,974				259,788
Central Bank of Chile			630,053				2,380,033				—				—				—				—				630,053				2,380,033
Foreign banks			—				—				—				—				358,542				297,778				358,542				297,778
Subtotal			780,027				2,639,821				—				—				358,542				297,778				1,138,569				2,937,599
Loans to Customers at amortized cost
Commercial loans			—				—				—				—				15,988,330				16,968,143				15,988,330				16,968,143
Residential mortgage loans			—				—				—				—				9,888,506				10,075,011				9,888,506				10,075,011
Consumer loans			—				—				—				—				4,215,509				3,711,582				4,215,509				3,711,582
Subtotal			—				—				—				—				30,092,345				30,754,736				30,092,345				30,754,736
Total			3,645,942				5,439,696				—				—				30,450,887				31,052,514				34,096,829				36,492,210
Liabilities
Current accounts and other demand deposits			11,326,133				15,167,229				—				—				—				—				11,326,133				15,167,229
Transactions in the course of payment			98,869				882,944				—				—				—				—				98,869				882,944
Obligations under repurchase agreements			308,734				288,917				—				—				—				—				308,734				288,917
Savings accounts and time deposits			—				—				—				—				10,795,125				8,885,015				10,795,125				8,885,015
Borrowings from financial institutions			—				—				—				—				1,555,129				3,415,959				1,555,129				3,415,959
Other financial obligations			—				—				—				—				160,361				217,311				160,361				217,311
Subtotal			11,733,736				16,339,090				—				—				12,510,615				12,518,285				24,244,351				28,857,375
Debt Issued
Letters of credit for residential purposes			—				—				11,081				7,201				—				—				11,081				7,201
Letters of credit for general purposes			—				—				725				280				—				—				725				280
Bonds			—				—				8,340,272				8,390,594				—				—				8,340,272				8,390,594
Subordinate bonds			—				—				—				—				1,004,621				1,004,196				1,004,621				1,004,196
Subtotal			—				—				8,352,078				8,398,075				1,004,621				1,004,196				9,356,699				9,402,271
Total			11,733,736				16,339,090				8,352,078				8,398,075				13,515,236				13,522,481				33,601,050				38,259,646

Schedule of offsetting of financial assets and liabilities

		Effect of offsetting on balance sheet												Related amount not offset
		Gross amount				Amounts offset				Net amounts reported on the balance sheet				Financial Instruments				Financial Collateral				Net amount
As of December 31, 2019		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Derivative financial assets			2,786,215				—				2,786,215				(2,113,970	)			(43,337	)			628,908
Derivative financial liabilities			2,818,421				—				2,818,421				(2,113,970	)			(418,988	)			285,463

		Effect of offsetting on balance sheet												Related amount not offset
		Gross amount				Amounts offset				Net amounts reported on the balance sheet				Financial Instruments				Financial Collateral				Net amount
As of December 31, 2020		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Derivative financial assets			2,618,004				—				2,618,004				(2,258,554	)			(85,614	)			273,836
Derivative financial liabilities			2,841,653				—				2,841,653				(2,258,554	)			(218,329	)			364,770

X

- Definition

The disclosure of fair value of financial instruments, not measured at fair value in statement of financial position.

+ References

No definition available.

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- Definition

The disclosure of impact on the fair value of financial instruments using alternative assumptions that are reasonably possible related to significant unobservable inputs.

+ References

No definition available.

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X

- Definition

The disclosure of level hierarchy classification of other assets and liabilities not measured at fair value on the balance sheet.

+ References

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Financial Assets and Liabilities [Table Text Block]

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- Definition

The disclosure of the fair value of financial instruments. [Refer: Financial instruments, class [member]; At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 10
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard
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- Definition

The disclosure of the offsetting of financial assets and financial liabilities. [Refer: Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2020-01-01
-Section Offsetting financial assets and financial liabilities
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&doctype=Standard&dita_xref=IFRS07_g13A-13F_TI
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- Definition

The disclosure of significant inputs for which market data are not available and that are developed using the best information available about the assumptions that market participants would use when measuring the fair value of assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2020-01-01
-Paragraph 93
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2020-en-r&anchor=para_93_d&doctype=Standard
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