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DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGE ACCOUNTING (Details) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of detailed information about hedges [line items] |  |
Notional amount | $ 241,467,084 | $ 177,224,139
Fair value Assets | 3,100,635 | 2,238,647
Fair value Liabilities | 2,517,728 | 2,139,488
Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 31,755,941 | 31,615,917
More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 48,016,614 | 35,372,847
More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 161,694,529 | 110,235,375
Fair Value Hedges [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 9,745,718 | 7,795,629
Fair value Assets | 111,146 | 38,088
Fair value Liabilities | 45,896 | 67,148
Fair Value Hedges [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 80,000 |
Fair Value Hedges [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 1,768,509 | 878,686
Fair Value Hedges [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 7,897,209 | 6,916,943
Fair Value Hedges [Member] | Interest Rate Swap Contract [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 1,762,612 | 1,717,156
Fair value Assets | 14,789 | 23,003
Fair value Liabilities | 9,188 | 1,424
Fair Value Hedges [Member] | Interest Rate Swap Contract [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 80,000 |
Fair Value Hedges [Member] | Interest Rate Swap Contract [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 491,600 | 162,985
Fair Value Hedges [Member] | Interest Rate Swap Contract [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 1,191,012 | 1,554,171
Fair Value Hedges [Member] | Cross Currency Swaps [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 7,983,105 | 6,078,473
Fair value Assets | 96,357 | 15,085
Fair value Liabilities | 36,708 | 65,724
Fair Value Hedges [Member] | Cross Currency Swaps [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Fair Value Hedges [Member] | Cross Currency Swaps [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 1,276,909 | 715,701
Fair Value Hedges [Member] | Cross Currency Swaps [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 67,061,971 | 5,362,772
Cash Flow Hedge [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 13,456,422 | 9,751,673
Fair value Assets | 79,859 | 75,636
Fair value Liabilities | 40,725 | 128,414
Cash Flow Hedge [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 2,126,650 | 1,222,521
Cash Flow Hedge [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 2,138,563 | 1,856,586
Cash Flow Hedge [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 9,191,209 | 6,672,566
Cash Flow Hedge [Member] | Cross Currency Swaps [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 13,082,521 | 8,731,598
Fair value Assets | 79,859 | 36,403
Fair value Liabilities | 32,712 | 128,355
Cash Flow Hedge [Member] | Cross Currency Swaps [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 1,920,900 | 421,428
Cash Flow Hedge [Member] | Cross Currency Swaps [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 1,970,412 | 1,637,604
Cash Flow Hedge [Member] | Cross Currency Swaps [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 9,191,209 | 6,672,566
Cash Flow Hedge [Member] | Currency Forwards [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 373,901 | 1,020,075
Fair value Assets |  | 39,233
Fair value Liabilities | 8,013 | 59
Cash Flow Hedge [Member] | Currency Forwards [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 205,750 | 801,093
Cash Flow Hedge [Member] | Currency Forwards [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 168,151 | 218,982
Cash Flow Hedge [Member] | Currency Forwards [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Trading Derivatives [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 218,264,944 | 159,676,837
Fair value Assets | 2,909,630 | 2,124,923
Fair value Liabilities | 2,431,107 | 1,943,926
Trading Derivatives [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 29,549,291 | 30,393,396
Trading Derivatives [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 44,109,542 | 32,637,575
Trading Derivatives [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 144,606,111 | 96,645,866
Trading Derivatives [Member] | Interest Rate Swap Contract [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 103,542,394 | 69,802,132
Fair value Assets | 723,870 | 467,188
Fair value Liabilities | 577,835 | 392,366
Trading Derivatives [Member] | Interest Rate Swap Contract [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 12,024,095 | 9,069,964
Trading Derivatives [Member] | Interest Rate Swap Contract [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 22,064,681 | 14,389,389
Trading Derivatives [Member] | Interest Rate Swap Contract [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 69,453,618 | 46,342,779
Trading Derivatives [Member] | Cross Currency Swaps [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 80,002,756 | 57,578,156
Fair value Assets | 1,568,365 | 1,241,632
Fair value Liabilities | 1,385,314 | 1,042,120
Trading Derivatives [Member] | Cross Currency Swaps [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 2,173,111 | 2,963,641
Trading Derivatives [Member] | Cross Currency Swaps [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 8,853,306 | 7,503,144
Trading Derivatives [Member] | Cross Currency Swaps [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 68,976,339 | 47,111,371
Trading Derivatives [Member] | Currency Forwards [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 34,445,001 | 31,747,403
Fair value Assets | 613,063 | 412,994
Fair value Liabilities | 466,741 | 502,555
Trading Derivatives [Member] | Currency Forwards [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 15,301,943 | 17,976,683
Trading Derivatives [Member] | Currency Forwards [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 13,080,875 | 10,679,327
Trading Derivatives [Member] | Currency Forwards [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 6,062,183 | 3,091,393
Trading Derivatives [Member] | Call currency options [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 144,545 | 277,338
Fair value Assets | 4,332 | 1,322
Fair value Liabilities | 854 | 1,950
Trading Derivatives [Member] | Call currency options [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 26,731 | 190,386
Trading Derivatives [Member] | Call currency options [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 60,235 | 37,099
Trading Derivatives [Member] | Call currency options [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 57,579 | 49,853
Trading Derivatives [Member] | Call interest rate options [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Fair value Assets |  |
Fair value Liabilities |  |
Trading Derivatives [Member] | Call interest rate options [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Trading Derivatives [Member] | Call interest rate options [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Trading Derivatives [Member] | Call interest rate options [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Trading Derivatives [Member] | Put currency options [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 130,248 | 271,808
Fair value Assets |  | 1,787
Fair value Liabilities | 363 | 4,935
Trading Derivatives [Member] | Put currency options [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 23,411 | 192,722
Trading Derivatives [Member] | Put currency options [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 50,445 | 28,616
Trading Derivatives [Member] | Put currency options [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount | 56,392 | 50,470
Trading Derivatives [Member] | Other derivatives [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Fair value Assets |  |
Fair value Liabilities |  |
Trading Derivatives [Member] | Other derivatives [Member] | Up To 3 Months [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Trading Derivatives [Member] | Other derivatives [Member] | More Than 3 Months To 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |
Trading Derivatives [Member] | Other derivatives [Member] | More Than 1 Year [Member] |  |
Disclosure of detailed information about hedges [line items] |  |
Notional amount |  |

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