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Fair Value of Financial Assets and Liabilities: (Details) - Schedule of fair values of the financial assets and liabilities that are not recorded at fair value in the statement of financial position - CLP ($) $ in Millions | Mar. 31, 2020 | Mar. 31, 2019
--- | --- | ---
Financial Liabilities [Member] |  |
Assets |  |
Financial Assets | $ 35,840,656 | $ 33,390,035
Financial Liabilities [Member] | Current accounts and other demand deposits [Member] |  |
Assets |  |
Financial Assets | 15,167,229 | 11,326,133
Financial Liabilities [Member] | Transactions in the course of payment [Member] |  |
Assets |  |
Financial Assets | 882,944 | 98,869
Financial Liabilities [Member] | Obligations under repurchase agreements [Member] |  |
Assets |  |
Financial Assets | 288,917 | 308,734
Financial Liabilities [Member] | Saving accounts and time deposits [Member] |  |
Assets |  |
Financial Assets | 8,899,541 | 10,856,618
Financial Liabilities [Member] | Borrowings from financial institutions [Member] |  |
Assets |  |
Financial Assets | 3,669,753 | 1,563,277
Financial Liabilities [Member] | Other financial obligations [Member] |  |
Assets |  |
Financial Assets | 191,713 | 156,229
Financial Liabilities [Member] | Borrowings And Deposits [Member] |  |
Assets |  |
Financial Assets | 29,100,097 | 24,309,860
Financial Liabilities [Member] | Letters of credit for residential purposes [Member] |  |
Assets |  |
Financial Assets | 6,532 | 10,229
Financial Liabilities [Member] | Letters of credit for general purposes [Member] |  |
Assets |  |
Financial Assets | 254 | 669
Financial Liabilities [Member] | Bonds [Member] |  |
Assets |  |
Financial Assets | 7,700,402 | 7,912,621
Financial Liabilities [Member] | Subordinated bonds [Member] |  |
Assets |  |
Financial Assets | 886,407 | 889,895
Financial Liabilities [Member] | Debt issued [Member] |  |
Assets |  |
Financial Assets | 8,593,595 | 8,813,414
Financial Liabilities [Member] | Financial Liabilities [Member] |  |
Assets |  |
Financial Assets | 37,693,692 | 33,123,274
Financial Liabilities [Member] | Cash and due from banks [Member] |  |
Assets |  |
Financial Assets | 2,560,216 | 2,392,166
Financial Liabilities [Member] | Transactions in the course of collection [Member] |  |
Assets |  |
Financial Assets | 163,252 | 331,420
Financial Liabilities [Member] | Investments under resale agreements [Member] |  |
Assets |  |
Financial Assets | 76,407 | 142,329
Financial Liabilities [Member] | Cash and other transactions [Member] |  |
Assets |  |
Financial Assets | 2,799,875 | 2,865,915
Financial Liabilities [Member] | Domestic banks [Member] |  |
Assets |  |
Financial Assets | 259,788 | 149,974
Financial Liabilities [Member] | Central Bank of Chile [Member] |  |
Assets |  |
Financial Assets | 2,380,033 | 630,053
Financial Liabilities [Member] | Foreign banks [Member] |  |
Assets |  |
Financial Assets | 299,377 | 360,054
Financial Liabilities [Member] | Loans and advances to banks [Member] |  |
Assets |  |
Financial Assets | 2,939,198 | 1,140,081
Financial Liabilities [Member] | Commercial loans [Member] |  |
Assets |  |
Financial Assets | 17,120,207 | 16,039,411
Financial Liabilities [Member] | Residential mortgage loans [Member] |  |
Assets |  |
Financial Assets | 9,352,720 | 9,163,019
Financial Liabilities [Member] | Consumer loans [Member] |  |
Assets |  |
Financial Assets | 3,628,656 | 4,181,609
Financial Liabilities [Member] | Loans to Customers [Member] |  |
Assets |  |
Financial Assets | 30,101,583 | 29,384,039
Fair Value - not measured at fair value |  |
Assets |  |
Financial Liabilities | 36,492,210 | 34,096,829
Fair Value - not measured at fair value | Current accounts and other demand deposits [Member] |  |
Assets |  |
Financial Liabilities | 15,167,229 | 11,326,133
Fair Value - not measured at fair value | Transactions in the course of payment [Member] |  |
Assets |  |
Financial Liabilities | 882,944 | 98,869
Fair Value - not measured at fair value | Obligations under repurchase agreements [Member] |  |
Assets |  |
Financial Liabilities | 288,917 | 308,734
Fair Value - not measured at fair value | Saving accounts and time deposits [Member] |  |
Assets |  |
Financial Liabilities | 8,885,015 | 10,795,125
Fair Value - not measured at fair value | Borrowings from financial institutions [Member] |  |
Assets |  |
Financial Liabilities | 3,415,959 | 1,555,129
Fair Value - not measured at fair value | Other financial obligations [Member] |  |
Assets |  |
Financial Liabilities | 217,311 | 160,361
Fair Value - not measured at fair value | Borrowings And Deposits [Member] |  |
Assets |  |
Financial Liabilities | 28,857,375 | 24,244,351
Fair Value - not measured at fair value | Letters of credit for residential purposes [Member] |  |
Assets |  |
Financial Liabilities | 7,201 | 11,081
Fair Value - not measured at fair value | Letters of credit for general purposes [Member] |  |
Assets |  |
Financial Liabilities | 280 | 725
Fair Value - not measured at fair value | Bonds [Member] |  |
Assets |  |
Financial Liabilities | 8,390,594 | 8,340,272
Fair Value - not measured at fair value | Subordinated bonds [Member] |  |
Assets |  |
Financial Liabilities | 1,004,196 | 1,004,621
Fair Value - not measured at fair value | Debt issued [Member] |  |
Assets |  |
Financial Liabilities | 9,402,271 | 9,356,699
Fair Value - not measured at fair value | Financial Liabilities [Member] |  |
Assets |  |
Financial Liabilities | 38,259,646 | 33,601,050
Fair Value - not measured at fair value | Cash and due from banks [Member] |  |
Assets |  |
Financial Liabilities | 2,560,216 | 2,392,166
Fair Value - not measured at fair value | Transactions in the course of collection [Member] |  |
Assets |  |
Financial Liabilities | 163,252 | 331,420
Fair Value - not measured at fair value | Investments under resale agreements [Member] |  |
Assets |  |
Financial Liabilities | 76,407 | 142,329
Fair Value - not measured at fair value | Cash and other transactions [Member] |  |
Assets |  |
Financial Liabilities | 2,799,875 | 2,865,915
Fair Value - not measured at fair value | Domestic banks [Member] |  |
Assets |  |
Financial Liabilities | 259,788 | 149,974
Fair Value - not measured at fair value | Central Bank of Chile [Member] |  |
Assets |  |
Financial Liabilities | 2,380,033 | 630,053
Fair Value - not measured at fair value | Foreign banks [Member] |  |
Assets |  |
Financial Liabilities | 297,778 | 358,542
Fair Value - not measured at fair value | Loans and advances to banks [Member] |  |
Assets |  |
Financial Liabilities | 2,937,599 | 1,138,569
Fair Value - not measured at fair value | Commercial loans [Member] |  |
Assets |  |
Financial Liabilities | 16,968,143 | 15,988,330
Fair Value - not measured at fair value | Residential mortgage loans [Member] |  |
Assets |  |
Financial Liabilities | 10,075,011 | 9,888,506
Fair Value - not measured at fair value | Consumer loans [Member] |  |
Assets |  |
Financial Liabilities | 3,711,582 | 4,215,509
Fair Value - not measured at fair value | Loans to Customers [Member] |  |
Assets |  |
Financial Liabilities | $ 30,754,736 | $ 30,092,345

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