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Investments Under Resale Agreements and Obligations Under Repurchase Agreements (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | $ 102,057 | $ 73,496
Over 1 month and up to 3 months |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 29,393 | 16,918
Over 3 months and up to 12 months [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 10,879 | 6,875
Instruments Issued By Chilean Government And Central Bank [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 29,643 | 742
Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 29,643 | 742
Other Instruments Issued In Chile [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 112,686 | 96,547
Other Instruments Issued In Chile [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 72,414 | 72,754
Other Instruments Issued In Chile [Member] | Over 1 month and up to 3 months |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 29,393 | 16,918
Other Instruments Issued In Chile [Member] | Over 3 months and up to 12 months [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 10,879 | 6,875
Central Bank promissory notes | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing |  | 742
Central Bank promissory notes | Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing |  | 742
Bonds from domestic banks | Other Instruments Issued In Chile [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 15,407 | 367
Bonds from domestic banks | Other Instruments Issued In Chile [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 15,407 | 367
Deposits in domestic banks [Member] | Other Instruments Issued In Chile [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing |  | 2,053
Deposits in domestic banks [Member] | Other Instruments Issued In Chile [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing |  | 2,053
Other Instruments | Other Instruments Issued In Chile [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 97,279 | 94,127
Other Instruments | Other Instruments Issued In Chile [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 57,007 | 70,334
Other Instruments | Other Instruments Issued In Chile [Member] | Over 1 month and up to 3 months |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 29,393 | 16,918
Other Instruments | Other Instruments Issued In Chile [Member] | Over 3 months and up to 12 months [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 10,879 | $ 6,875
Central Bank bonds [Member] | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 11,184 |
Central Bank bonds [Member] | Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 11,184 |
Other instruments issued by the Chilean Government and Central Bank [Member] | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | 18,459 |
Other instruments issued by the Chilean Government and Central Bank [Member] | Instruments Issued By Chilean Government And Central Bank [Member] | Up to 1 month |  |
Receivables from repurchase agreements and security borrowings [Line Items] |  |
Receivables from repurchase agreements and security borrowing | $ 18,459 |

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