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Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2020 CLP ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 CLP ($) | Dec. 31, 2018 CLP ($)
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Individual provisions | $ (226,043) |  | $ (20,611) | $ (2,608)
Group provisions | (367,474) |  | (362,619) | (310,492)
Provisions established net | (593,517) |  | (383,230) | (313,100)
Individual provisions | 4,652 |  | 3,654 | 2,423
Group provisions |  |  |  | 327
Provisions released net | 4,652 |  | 3,654 | 2,750
Recovery of written-off assets | 41,759 |  | 47,975 | 60,579
Provisions net allowances for credit risk | (547,106) | $ (768,515) | (331,601) | (249,771)
Loans and advance to banks [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Individual provisions | (348) |  |  | (240)
Provisions established net | (348) |  |  | (240)
Individual provisions |  |  | 902 |
Provisions released net |  |  | 902 |
Provisions net allowances for credit risk | (348) |  | 902 | (240)
Contingent loan risks [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Individual provisions | (18,084) |  |  | (2,368)
Group provisions | (55,126) |  | (2,707) |
Provisions established net | (73,210) |  | (2,707) | (2,368)
Individual provisions |  |  | 2,752 |
Group provisions |  |  |  | 327
Provisions released net |  |  | 2,752 | 327
Provisions net allowances for credit risk | (73,210) |  | 45 | (2,041)
Commercial loans [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Individual provisions | (207,611) |  | (17,143) |
Group provisions | (88,278) |  | (64,492) | (61,702)
Provisions established net | (295,889) |  | (81,635) | (61,702)
Individual provisions |  |  |  | 871
Provisions released net |  |  |  | 871
Recovery of written-off assets | 8,599 |  | 12,253 | 13,579
Provisions net allowances for credit risk | (287,290) |  | (69,382) | (47,252)
Mortgage loans [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Group provisions | (4,607) |  | (17,168) | (7,546)
Provisions established net | (4,607) |  | (17,168) | (7,546)
Recovery of written-off assets | 3,377 |  | 5,114 | 4,572
Provisions net allowances for credit risk | (1,230) |  | (12,054) | (2,974)
Consumer loans [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Group provisions | (219,463) |  | (278,252) | (241,244)
Provisions established net | (219,463) |  | (278,252) | (241,244)
Recovery of written-off assets | 29,783 |  | 30,608 | 42,428
Provisions net allowances for credit risk | (189,680) |  | (247,644) | (198,816)
Subtotal [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Individual provisions | (207,611) |  | (17,143) |
Group provisions | (312,348) |  | (359,912) | (310,492)
Provisions established net | (519,959) |  | (377,055) | (310,492)
Individual provisions |  |  |  | 871
Provisions released net |  |  |  | 871
Recovery of written-off assets | 41,759 |  | 47,975 | 60,579
Provisions net allowances for credit risk | (478,200) |  | (329,080) | (249,042)
Debt instruments at fair value through OCI [member] |  |  |  |
Provisions for Expected Credit Losses (Details) - Schedule of changes in provisions for loan losses [Line Items] |  |  |  |
Individual provisions |  |  | (3,468) |
Provisions established net |  |  | (3,468) |
Individual provisions | 4,652 |  |  | 1,552
Provisions released net | 4,652 |  |  | 1,552
Provisions net allowances for credit risk | $ 4,652 |  | $ (3,468) | $ 1,552

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