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Loans and Advances to Banks, net (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of loans and advances to banks [text block] [Abstract]

Schedule of loans and advance to banks, net

		2019				2020
		MCh$				MCh$
Domestic Banks
Interbank loans			150,007				260,002
Other credits with domestic banks			—				—
Provisions for loans to domestic banks			(33	)			(214	)
Subtotal			149,974				259,788

Foreign Banks
Loans to foreign banks			289,337				185,858
Credits with third countries			8,934				167
Chilean export trade banks			61,860				113,596
Provisions for loans to foreign banks			(77	)			(244	)
Subtotal			360,054				299,377

Central Bank of Chile
Central Bank deposits			630,053				2,380,033
Other Central Bank credits			—				—
Subtotal			630,053				2,380,033
Total			1,140,081				2,939,198

Schedule of impairment allowance for due from banks

		2019																2020
		Stage 1 Individual				Stage 2 Individual				Stage 3 Individual				Total				Stage 1 Individual				Stage 2 Individual				Stage 3 Individual				Total
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Domestic Banks
Normal			150,007				—				—				150,007				260,002				—				—				260,002
Substandard			—				—				—				—				—				—				—				—
Non-complying			—				—				—				—				—				—				—				—
Subtotal			150,007				—				—				150,007				260,002				—				—				260,002

Foreign Banks
Normal			238,491				121,640				—				360,131				299,621				—				—				299,621
Substandard			—				—				—				—				—				—				—				—
Non-complying			—				—				—				—				—				—				—				—
Subtotal			238,491				121,640				—				360,131				299,621				—				—				299,621

Central Bank of Chile
Normal			630,053				—				—				630,053				2,380,033				—				—				2,380,033
Substandard			—				—				—				—				—				—				—				—
Non-complying			—				—				—				—				—				—				—				—
Subtotal			630,053				—				—				630,053				2,380,033				—				—				2,380,033
Total			1,018,551				121,640				—				1,140,191				2,939,656				—				—				2,939,656

Schedule of changes in gross carrying amount and corresponding allowance for ECL by stage

		Changes as of December 31, 2019
		Stage 1 Individual								Stage 2 Individual								Stage 3 Individual								Total
		Gross carrying amount				ECL				Gross carrying amount				ECL				Gross carrying amount				ECL				Gross carrying amount				ECL
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
ECL allowances as of January 1, 2019			1,467,502				937				27,894				75				—				—				1,495,396				1,012
Net change on Balance*			(321,373	)			(832	)			(6,339	)			(48	)			—				—				(327,712	)			(880	)
Transfer to Stage 1			16,405				26				(16,405	)			(26	)			—				—				—				—
Transfer to Stage 2			(126,709	)			(27	)			126,709				27				—				—				—				—
Transfer to Stage 3			—				—				—				—				—				—				—				—
Impact on year-end ECL of exposures transferred between stages during the year **			—				—				—				—				—				—				—				—
Changes to models and assumptions			—				—				—				—				—				—				—				—
Amounts written off			—				—				—				—				—				—				—				—
Foreign exchange adjustments			(17,274	)			(20	)			(10,219	)			(2	)			—				—				(27,493	)			(22	)
Total			1,018,551				84				121,640				26				—				—				1,140,191				110

		Changes as of December 31, 2020
		Stage 1 Individual								Stage 2 Individual								Stage 3 Individual								Total
		Gross carrying amount				ECL				Gross carrying amount				ECL				Gross carrying amount				ECL				Gross carrying amount				ECL
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
ECL allowances as of January 1, 2020			1,018,551				84				121,640				26				—				—				1,140,191				110
Net change on Balance *			1,845,572				(84	)			(45,547	)			(26	)			—				—				1,800,025				(110	)
Transfer to Stage 1			86,986				—				(86,986	)			—				—				—				—				—
Transfer to Stage 2			—				—				—				—				—				—				—				—
Transfer to Stage 3			—				—				—				—				—				—				—				—
Impact on year-end ECL of exposures transferred between stages during the year **			—				—				—				—				—				—				—				—
Changes to models and assumptions			—				458				—				—				—				—				—				458
Amounts written off			—				—				—				—				—				—				—				—
Foreign exchange adjustments			(11,453	)			—				10,893				—				—				—				(560	)			—
Total			2,939,656				458				—				—				—				—				2,939,656				458