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Risk Management - Portfolio Concentration Credit Risk Geographic Region (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of credit risk exposure [line items] |  |
Financial assets | $ 1,366,343 | $ 1,053,191
Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 2,724,621 | 1,478,533
Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 61,594 | 35,414
Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,345,439 | 943,835
Domestic banks | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 2,020,423 | 1,128,151
Domestic banks | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 4,547
Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 20,904 |
Other | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 482,446 | 228,886
Other | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 29,950 | 16,519
United States |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 108,544
United States | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 221,752 | 121,496
United States | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 25,780 | 14,348
Brazil |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 812
Put Options | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,076 | 120
Put Options | Domestic banks | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 807 | 56
Put Options | Other | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 64
Financial assets held-for-trading |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,872,355 | 1,745,366
Financial assets held-for-trading | Other instruments issued in Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 375,337 | 129,607
Financial assets held-for-trading | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 4,446
Financial assets held-for-trading | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,123,689 | 1,523,472
Financial assets held-for-trading | Mutual fund investments |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 373,329 | 87,841
Financial assets held-for-trading | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,872,355 | 1,740,920
Financial assets held-for-trading | Domestic banks | Other instruments issued in Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 375,337 | 129,607
Financial assets held-for-trading | Domestic banks | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,123,689 | 1,523,472
Financial assets held-for-trading | Domestic banks | Mutual fund investments |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 373,329 |
Financial assets held-for-trading | United States |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 4,446
Financial assets held-for-trading | United States | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 4,446
Swaps | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,761,952 | 738,130
Swaps | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 61,594 | 35,414
Swaps | Domestic banks | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,142,174 | 453,191
Swaps | Domestic banks | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 4,547
Swaps | Other | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 451,960 | 186,525
Swaps | Other | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 29,950 | 16,519
Swaps | United States | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 167,818 | 98,414
Swaps | United States | Hedge derivative contracts |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 25,780 | 14,348
Call Options | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 4,961 | 4,839
Call Options | Domestic banks | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 4,961 | 4,309
Call Options | Other | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 530
Forward Contract [Member] | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 956,632 | 735,444
Forward Contract [Member] | Domestic banks | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 872,481 | 670,595
Forward Contract [Member] | Other | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 30,228 | 41,767
Forward Contract [Member] | United States | Derivative contracts for trading purposes |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 53,923 | 23,082
FVOCI |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,366,343 | 1,053,191
FVOCI | Other instruments issued in Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 770,674
FVOCI | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 108,544
FVOCI | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 164,222
FVOCI | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 8,939
FVOCI | Domestic banks | Other instruments issued in Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 779,613
FVOCI | Domestic banks | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 164,222
FVOCI | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 812
FVOCI | Other | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 812
FVOCI | United States |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  |
FVOCI | United States | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 108,544
Mortgages |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 9,206,727 | 8,052,073
Mortgages | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 30,018,587 | 8,052,073
Consumer loans |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 4,532,333 | 4,436,161
Consumer loans | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 4,532,333 | 4,436,161
Loans to customers |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 30,033,272 | 27,926,632
Loans to customers | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 30,018,587 | 27,833,088
Loans to customers | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 14,685 | 93,190
Loans to customers | Brazil |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 354
Foreign banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 360,131 | 294,542
Foreign banks | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 115,162 | 84,849
Foreign banks | Brazil |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 244,969 | 209,693
Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 150,007 | 100,023
Domestic banks | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 150,007 | 100,023
Central Bank of Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 630,053 | 1,100,831
Central Bank of Chile | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 630,053 | 1,100,831
Loans and advances to banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,140,191 | 1,495,396
Loans and advances to banks | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 780,060 | 1,200,854
Loans and advances to banks | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 115,162 | 84,849
Loans and advances to banks | Brazil |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 244,969 | 209,693
Commercial loans |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 16,294,212 | 15,438,398
Commercial loans | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 16,279,527 | 15,344,854
Commercial loans | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 14,685 | 93,190
Commercial loans | Brazil |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 354
Cash collateral on securities borrowed and reverse repurchase agreements |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 142,329 | 97,289
Cash collateral on securities borrowed and reverse repurchase agreements | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 142,329 | 97,289
Cash and due from banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 2,392,166 | 880,081
Cash and due from banks | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,144,109 | 773,368
Cash and due from banks | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 102,354 | 37,370
Cash and due from banks | United States |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,145,703 | 69,343
Small business loans |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 4,176,488 | 3,732,539
Corporate loans |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets |  | 11,705,859
Financial assets available-for-sale |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 8,497 | $ 9,751
Financial assets available-for-sale | Other instruments issued in Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,228,931 |
Financial assets available-for-sale | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 19,853 |
Financial assets available-for-sale | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 109,062 |
Financial assets available-for-sale | Domestic banks |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 7,446 |
Financial assets available-for-sale | Domestic banks | Other instruments issued in Chile |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,228,931 |
Financial assets available-for-sale | Domestic banks | Instruments Issued By Chilean Government And Central Bank [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,123,689 |
Financial assets available-for-sale | Other |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | 1,051 |
Financial assets available-for-sale | Other | Instruments issued by foreign institutions |  |
Disclosure of credit risk exposure [line items] |  |
Financial assets | $ 19,853 |

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