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Derivative Financial Instruments and Hedge Accounting (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | $ 377,131,597 | $ 241,467,084 | $ 177,224,139
Fair value Assets | 8,148,608 | 3,100,635 | 2,238,647
Fair value Liabilities | 7,390,654 | 2,517,728 | 2,139,488
More Than 3 Months To 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 84,086,430 |  | 35,372,847
More Than 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 236,978,332 |  | 110,235,375
Up To 3 Months [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 56,066,835 |  | 31,615,917
Cash Flow Hedge [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 16,939,379 | 13,456,422 | 9,751,673
Fair value Assets | 110,544 | 79,859 |
Fair value Liabilities | 46,688 | 40,725 |
Cash Flow Hedge [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 15,053,362 | 13,082,521 | 8,731,598
Fair value Assets | 106,413 | 79,859 |
Fair value Liabilities | 43,183 | 32,712 |
Cash Flow Hedge [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 1,886,017 | 373,901 | 1,020,075
Fair value Assets | 4,131 |  |
Fair value Liabilities | 3,505 | 8,013 |
Cash Flow Hedge [Member] | More Than 3 Months To 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 2,956,878 |  | 1,856,586
Cash Flow Hedge [Member] | More Than 3 Months To 1 Year [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 1,938,222 |  | 1,637,604
Cash Flow Hedge [Member] | More Than 3 Months To 1 Year [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 1,018,656 |  | 218,982
Cash Flow Hedge [Member] | More Than 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 11,616,489 |  | 6,672,566
Cash Flow Hedge [Member] | More Than 1 Year [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 10,848,233 |  | 6,672,566
Cash Flow Hedge [Member] | More Than 1 Year [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 768,256 |  |
Cash Flow Hedge [Member] | Up To 3 Months [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 2,366,012 |  | 1,222,521
Cash Flow Hedge [Member] | Up To 3 Months [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 2,266,907 |  | 421,428
Cash Flow Hedge [Member] | Up To 3 Months [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 99,105 |  | 801,093
Trading Derivatives [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 343,017,782 |  | 159,676,837
Fair value Assets | 7,771,734 | 2,909,630 |
Fair value Liabilities | 7,014,421 | 2,431,107 |
Trading Derivatives [Member] | Put currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 138,936 |  | 271,808
Fair value Assets | 190 |  |
Fair value Liabilities | 483 | 363 |
Trading Derivatives [Member] | Call currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 146,787 |  | 277,338
Fair value Assets | 5,176 | 4,332 |
Fair value Liabilities | 240 | 854 |
Trading Derivatives [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 141,390,865 |  | 57,578,156
Fair value Assets | 4,277,450 | 1,568,365 |
Fair value Liabilities | 3,605,516 | 1,385,314 |
Trading Derivatives [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 146,680,442 |  | 69,802,132
Fair value Assets | 2,465,235 | 723,870 |
Fair value Liabilities | 2,270,686 | 577,835 |
Trading Derivatives [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 54,660,752 |  | 31,747,403
Fair value Assets | 1,023,683 | 613,063 |
Fair value Liabilities | 1,137,496 | 466,741 |
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 79,947,958 |  | 32,637,575
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] | Put currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 41,872 |  | 28,616
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] | Call currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 47,012 |  | 37,099
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 20,457,463 |  | 7,503,144
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 40,892,909 |  | 14,389,389
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 18,508,702 |  | 10,679,327
Trading Derivatives [Member] | More Than 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 210,157,647 |  | 96,645,866
Trading Derivatives [Member] | More Than 1 Year [Member] | Put currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 80,655 |  | 50,470
Trading Derivatives [Member] | More Than 1 Year [Member] | Call currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 81,804 |  | 49,853
Trading Derivatives [Member] | More Than 1 Year [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 113,206,678 |  | 47,111,371
Trading Derivatives [Member] | More Than 1 Year [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 89,109,046 |  | 46,342,779
Trading Derivatives [Member] | More Than 1 Year [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 7,679,464 |  | 3,091,393
Trading Derivatives [Member] | Up To 3 Months [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 52,912,177 |  | 30,393,396
Trading Derivatives [Member] | Up To 3 Months [Member] | Put currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 16,409 |  | 192,722
Trading Derivatives [Member] | Up To 3 Months [Member] | Call currency options [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 17,971 |  | 190,386
Trading Derivatives [Member] | Up To 3 Months [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 7,726,724 |  | 2,963,641
Trading Derivatives [Member] | Up To 3 Months [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 16,678,487 |  | 9,069,964
Trading Derivatives [Member] | Up To 3 Months [Member] | Currency Forwards [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 28,472,586 |  | 17,976,683
Fair Value Hedges [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 17,174,436 | 9,745,718 | 7,795,629
Fair value Assets | 266,330 | 111,146 |
Fair value Liabilities | 329,545 | 45,896 |
Fair Value Hedges [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 14,628,050 | 7,983,106 | 6,078,473
Fair value Assets | 226,870 | 96,357 |
Fair value Liabilities | 295,281 | 36,708 |
Fair Value Hedges [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 2,546,386 | 1,762,612 | 1,717,156
Fair value Assets | 39,460 | 14,789 |
Fair value Liabilities | 34,264 | $ 9,188 |
Fair Value Hedges [Member] | More Than 3 Months To 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 1,181,594 |  | 878,686
Fair Value Hedges [Member] | More Than 3 Months To 1 Year [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 863,984 |  | 715,701
Fair Value Hedges [Member] | More Than 3 Months To 1 Year [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 317,610 |  | 162,985
Fair Value Hedges [Member] | More Than 1 Year [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 15,204,196 |  | 6,916,943
Fair Value Hedges [Member] | More Than 1 Year [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 13,357,058 |  | 5,362,772
Fair Value Hedges [Member] | More Than 1 Year [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 1,847,138 |  | 1,554,171
Fair Value Hedges [Member] | Up To 3 Months [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 788,646 |  |
Fair Value Hedges [Member] | Up To 3 Months [Member] | Cross Currency Swaps [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | 407,008 |  |
Fair Value Hedges [Member] | Up To 3 Months [Member] | Interest Rate Swap Contract [Member] |  |  |
Disclosure of detailed information about hedges [line items] |  |  |
Notional amount | $ 381,638 |  |

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