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Fair Value of Financial Assets and Liabilities (Details 1) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of financial assets [line items] |  |  |
Assets | $ 50,574,714 | $ 39,132,512 |
Liabilities | 47,096,211 | 35,887,052 |
Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 4,262,625 |  |
Liabilities |  |  |
Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 8,465,462 |  |
Liabilities | 8,382,418 | 2,888,445 |
Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 81,678 | 80,781 | $ 22,987
Liabilities | 2,950 | 795 | $ 7
Financial derivative contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 8,148,608 | 3,100,635 |
Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 170,232 | 170,232 |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 270,204 | 77,041 |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 270,204 |  |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 5,883 |
Recurrent Basis [Member] | Financial Assets Held For Trading [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Loans and accounts receivable at FVOCI, net [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 66,065 | 68,588 |
Recurrent Basis [Member] | Loans and accounts receivable at FVOCI, net [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Loans and accounts receivable at FVOCI, net [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Recurrent Basis [Member] | Loans and accounts receivable at FVOCI, net [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  | 68,588 |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 4,010,272 | 2,394,323 |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 3,992,421 | 2,368,768 |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 17,146 | 24,920 |
Recurrent Basis [Member] | Debt Instrument At FVOCI [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 705 | 635 |
Recurrent Basis [Member] | Financial derivative contracts [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 8,148,608 | 3,100,635 |
Liabilities |  | 2,517,728 |
Recurrent Basis [Member] | Financial derivative contracts [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Liabilities |  |  |
Recurrent Basis [Member] | Financial derivative contracts [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 8,133,700 | 3,089,077 |
Liabilities | 7,387,704 | 2,516,933 |
Recurrent Basis [Member] | Financial derivative contracts [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 14,908 | 11,558 |
Liabilities | 2,950 | 795 |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 314,616 | 170,232 |
Liabilities | 994,714 | 371,512 |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] | Level 1 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Liabilities |  |  |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] | Level 2 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets | 314,616 | 170,232 |
Liabilities | 994,714 | 371,512 |
Recurrent Basis [Member] | Guarantee Deposits (Margin Accounts) [Member] | Level 3 [Member] |  |  |
Disclosure of financial assets [line items] |  |  |
Assets |  |  |
Liabilities |  |  |

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