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Provisions for Expected Credit Losses (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of Provisions for Loan Losses [Abstract]

Schedule of changes in provisions for loan losses

		Loans and				Loans to customers as of December 31, 2018																Debt instruments at fair value
		advance to banks				Commercial loans				Mortgage loans				Consumer loans				Subtotal				through OCI				Contingent loan risks				Total
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Provisions established:
Individual provisions			(240	)			—				—				—				—				—				(2,368	)			(2,608	)
Group provisions			—				(61,702	)			(7,546	)			(241,244	)			(310,492	)			—				—				(310,492	)
Provisions established net			(240	)			(61,702	)			(7,546	)			(241,244	)			(310,492	)			—				(2,368	)			(313,100	)

Provisions released:
Individual provisions			—				871				—				—				871				1,552				—				2,423
Group provisions			—				—				—				—				—				—				327				327
Provisions released net			—				871				—				—				871				1,552				327				2,750

Recovery of written-off assets			—				13,579				4,572				42,428				60,579				—				—				60,579

Provisions net allowances for credit risk			(240	)			(47,252	)			(2,974	)			(198,816	)			(249,042	)			1,552				(2,041	)			(249,771	)

		Loans and				Loans to customers as of December 31, 2019																Debt instruments at fair value
		advance to banks				Commercial loans				Mortgage loans				Consumer loans				Subtotal				through OCI				Contingent loan risks				Total
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Provisions established:
Individual provisions			—				(17,143	)			—				—				(17,143	)			(3,468	)			—				(20,611	)
Group provisions			—				(64,492	)			(17,168	)			(278,252	)			(359,912	)			—				(2,707	)			(362,619	)
Provisions established net			—				(81,635	)			(17,168	)			(278,252	)			(377,055	)			(3,468	)			(2,707	)			(383,230	)

Provisions released:
Individual provisions			902				—				—				—				—				—				2,752				3,654
Group provisions			—				—				—				—				—				—				—				—
Provisions released net			902				—				—				—				—				—				2,752				3,654

Recovery of written-off assets			—				12,253				5,114				30,608				47,975				—				—				47,975

Provisions net allowances for credit risk			902				(69,382	)			(12,054	)			(247,644	)			(329,080	)			(3,468	)			45				(331,601	)

		Loans and				Loans to customers as of December 31, 2020																Debt instruments at fair value
		advance to banks				Commercial loans				Mortgage loans				Consumer loans				Subtotal				through OCI				Contingent loan risks				Total
		MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$				MCh$
Provisions established:
Individual provisions			(348	)			(207,611	)			—				—				(207,611	)			—				(18,084	)			(226,043	)
Group provisions			—				(88,278	)			(4,607	)			(219,463	)			(312,348	)			—				(55,126	)			(367,474	)
Provisions established net			(348	)			(295,889	)			(4,607	)			(219,463	)			(519,959	)			—				(73,210	)			(593,517	)

Provisions released:
Individual provisions			—				—				—				—				—				4,652				—				4,652
Group provisions			—				—				—				—				—				—				—				—
Provisions released net			—				—				—				—				—				4,652				—				4,652

Recovery of written-off assets			—				8,599				3,377				29,783				41,759				—				—				41,759

Provisions net allowances for credit risk			(348	)			(287,290	)			(1,230	)			(189,680	)			(478,200	)			4,652				(73,210	)			(547,106	)