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Fair Value of Financial Assets and Liabilities-Fair value of Financial Assets/Liabilities not measured at fair value on the balance sheet (Details) - CLP ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Financial instrument disclosures |  |
Financial Assets | $ 4,390,903 | $ 2,719,900
Financial Liabilities | 1,392,995 | 966,509
Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 27,120,715 | 27,687,684
Financial Liabilities | 27,029,913 | 26,520,720
Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 27,185,188 | 27,884,761
Financial liabilities at fair value | 27,161,529 | 26,700,132
Cash and other transactions | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 1,405,002 | 1,670,842
Cash and other transactions | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 1,405,002 | 1,670,842
Cash and due from banks | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 1,057,393 | 1,408,167
Cash and due from banks | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 1,057,393 | 1,408,167
Transactions in the course of collection | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 255,968 | 206,972
Transactions in the course of collection | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 255,968 | 206,972
Cash collateral on securities borrowed and reverse repurchase agreements | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 91,641 | 55,703
Cash collateral on securities borrowed and reverse repurchase agreements | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 91,641 | 55,703
Loans and advances to banks | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 760,021 | 1,173,187
Loans and advances to banks | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 760,021 | 1,173,187
Domestic banks | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 119,998 | 208,354
Domestic banks | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 119,998 | 208,354
Central Bank of Chile | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 350,916 | 700,341
Central Bank of Chile | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 350,916 | 700,341
Foreign banks | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 289,107 | 264,492
Foreign banks | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 289,107 | 264,492
Loans to customers | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 24,955,692 | 24,843,655
Loans to customers | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 25,020,165 | 25,040,732
Commercial loans | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 13,739,589 | 14,226,761
Commercial loans | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 13,477,466 | 13,998,477
Residential mortgage loans | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 7,445,221 | 6,892,019
Residential mortgage loans | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 7,769,694 | 7,313,953
Consumer loans | Book Value |  |
Financial instrument disclosures |  |
Financial Assets | 3,770,882 | 3,724,875
Consumer loans | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial assets at fair value | 3,773,005 | 3,728,302
Current and saving accounts and other financial obligations | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 20,540,938 | 20,342,793
Current and saving accounts and other financial obligations | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 20,540,105 | 20,349,708
Current accounts and other demand deposits | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 8,915,706 | 8,321,148
Current accounts and other demand deposits | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 8,915,706 | 8,321,148
Transactions in the course of payment | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 29,871 | 25,702
Transactions in the course of payment | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 29,871 | 25,702
Cash collateral on securities lent and reverse repurchase agreements | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 195,392 | 216,817
Cash collateral on securities lent and reverse repurchase agreements | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 195,392 | 216,817
Saving accounts and time deposits | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 10,067,778 | 10,552,901
Saving accounts and time deposits | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 10,073,030 | 10,563,751
Borrowings from financial institutions | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 1,195,028 | 1,040,026
Borrowings from financial institutions | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 1,188,943 | 1,036,091
Other financial obligations | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 137,163 | 186,199
Other financial obligations | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 137,163 | 186,199
Debt issued | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 6,488,975 | 6,177,927
Debt issued | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 6,621,424 | 6,350,424
Letters of credit for residential purposes | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 21,059 | 28,893
Letters of credit for residential purposes | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 22,542 | 30,918
Letters of credit for general purposes | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 2,365 | 4,021
Letters of credit for general purposes | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 2,532 | 4,303
Bonds | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 5,769,334 | 5,431,575
Bonds | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | 5,896,424 | 5,594,748
Subordinated bonds | Book Value |  |
Financial instrument disclosures |  |
Financial Liabilities | 696,217 | 713,438
Subordinated bonds | Fair Value - not measured at fair value |  |
Financial instrument disclosures |  |
Financial liabilities at fair value | $ 699,926 | $ 720,455

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