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LOANS AND ACCOUNT RECEIVABLE AT AMORTISED COST - under IFRS 9 (Details) - CLP ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of financial assets [line items] |  |
Assets before allowances | $ 30,213,414 |
ECL allowance | 882,414 |
Net Assets | 29,331,001 |
Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 26,913,508 |
ECL allowance | 153,640 |
Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,796,790 |
ECL allowance | 125,114 |
Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,503,116 |
ECL allowance | 603,660 |
Commercial Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 15,186,144 | $ 13,800,408
ECL allowance | 506,802 | 482,713
Net Assets | 14,679,342 |
Commercial Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 13,312,806 |
ECL allowance | 73,730 |
Commercial Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,100,255 |
ECL allowance | 55,640 |
Commercial Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 773,083 |
ECL allowance | 377,432 |
Commercial Loans [Member] | Interbank Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 15,093 |
ECL allowance | 10 |
Net Assets | 15,083 |
Commercial Loans [Member] | Interbank Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 15,093 |
ECL allowance | 10 |
Commercial Loans [Member] | Interbank Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances |  |
ECL allowance |  |
Commercial Loans [Member] | Interbank Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances |  |
ECL allowance |  |
Commercial Loans [Member] | Commercial Loans Portfolio [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 11,133,766 |
ECL allowance | 368,786 |
Net Assets | 10,764,980 |
Commercial Loans [Member] | Commercial Loans Portfolio [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 9,684,451 |
ECL allowance | 52,782 |
Commercial Loans [Member] | Commercial Loans Portfolio [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 841,123 |
ECL allowance | 41,954 |
Commercial Loans [Member] | Commercial Loans Portfolio [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 608,192 |
ECL allowance | 274,050 |
Commercial Loans [Member] | Foreign Trade Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,752,437 |
ECL allowance | 39,917 |
Net Assets | 1,712,520 |
Commercial Loans [Member] | Foreign Trade Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,646,337 |
ECL allowance | 5,466 |
Commercial Loans [Member] | Foreign Trade Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 56,295 |
ECL allowance | 735 |
Commercial Loans [Member] | Foreign Trade Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 49,805 |
ECL allowance | 33,716 |
Commercial Loans [Member] | Checking Accounts Debtors [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 215,162 |
ECL allowance | 13,784 |
Net Assets | 201,378 |
Commercial Loans [Member] | Checking Accounts Debtors [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 183,290 |
ECL allowance | 2,108 |
Commercial Loans [Member] | Checking Accounts Debtors [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 16,452 |
ECL allowance | 467 |
Commercial Loans [Member] | Checking Accounts Debtors [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 15,420 |
ECL allowance | 11,209 |
Commercial Loans [Member] | Factoring Transactions [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 380,983 |
ECL allowance | 4,353 |
Net Assets | 376,630 |
Commercial Loans [Member] | Factoring Transactions [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 370,391 |
ECL allowance | 829 |
Commercial Loans [Member] | Factoring Transactions [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 6,005 |
ECL allowance | 91 |
Commercial Loans [Member] | Factoring Transactions [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 4,587 |
ECL allowance | 3,433 |
Commercial Loans [Member] | Student Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 79,916 |
ECL allowance | 11,190 |
Net Assets | 68,726 |
Commercial Loans [Member] | Student Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 64,381 |
ECL allowance | 2,705 |
Commercial Loans [Member] | Student Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 6,049 |
ECL allowance | 2,170 |
Commercial Loans [Member] | Student Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 9,486 |
ECL allowance | 6,315 |
Commercial Loans [Member] | Leasing Transactions [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,443,724 |
ECL allowance | 38,800 |
Net Assets | 1,404,924 |
Commercial Loans [Member] | Leasing Transactions [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,225,755 |
ECL allowance | 7,236 |
Commercial Loans [Member] | Leasing Transactions [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 169,196 |
ECL allowance | 9,033 |
Commercial Loans [Member] | Leasing Transactions [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 48,773 |
ECL allowance | 22,531 |
Commercial Loans [Member] | Other Loans And Account Receivable [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 165,063 |
ECL allowance | 29,962 |
Net Assets | 135,101 |
Commercial Loans [Member] | Other Loans And Account Receivable [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 123,108 |
ECL allowance | 2,594 |
Commercial Loans [Member] | Other Loans And Account Receivable [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 5,135 |
ECL allowance | 1,190 |
Commercial Loans [Member] | Other Loans And Account Receivable [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 36,820 |
ECL allowance | 26,178 |
Mortgage Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 10,150,981 | 9,096,895
ECL allowance | 91,270 | 108,019
Net Assets | 10,059,711 |
Mortgage Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 9,258,962 |
ECL allowance | 9,006 |
Mortgage Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 447,496 |
ECL allowance | 15,102 |
Mortgage Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 444,523 |
ECL allowance | 67,162 |
Mortgage Loans [Member] | Loans With Mortgage Finance Bonds [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 17,426 |
ECL allowance | 177 |
Net Assets | 17,249 |
Mortgage Loans [Member] | Loans With Mortgage Finance Bonds [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 15,261 |
ECL allowance | 20 |
Mortgage Loans [Member] | Loans With Mortgage Finance Bonds [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,241 |
ECL allowance | 40 |
Mortgage Loans [Member] | Loans With Mortgage Finance Bonds [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 924 |
ECL allowance | 117 |
Mortgage Loans [Member] | Endorsable Mortgage Mutual Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 108,536 |
ECL allowance | 805 |
Net Assets | 107,731 |
Mortgage Loans [Member] | Endorsable Mortgage Mutual Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 101,074 |
ECL allowance | 87 |
Mortgage Loans [Member] | Endorsable Mortgage Mutual Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 3,454 |
ECL allowance | 126 |
Mortgage Loans [Member] | Endorsable Mortgage Mutual Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 4,008 |
ECL allowance | 592 |
Mortgage Loans [Member] | Other Mortgage Mutual Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 10,025,019 |
ECL allowance | 90,288 |
Net Assets | 9,934,731 |
Mortgage Loans [Member] | Other Mortgage Mutual Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 9,142,627 |
ECL allowance | 8,899 |
Mortgage Loans [Member] | Other Mortgage Mutual Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 442,801 |
ECL allowance | 14,936 |
Mortgage Loans [Member] | Other Mortgage Mutual Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 439,591 |
ECL allowance | 66,453 |
Consumer Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 4,876,289 | 4,557,692
ECL allowance | 284,342 | $ 297,359
Net Assets | 4,591,947 |
Consumer Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 4,341,740 |
ECL allowance | 70,904 |
Consumer Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 249,039 |
ECL allowance | 54,372 |
Consumer Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 285,510 |
ECL allowance | 159,066 |
Consumer Loans [Member] | Leasing Transactions [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 4,157 |
ECL allowance | 127 |
Net Assets | 4,030 |
Consumer Loans [Member] | Leasing Transactions [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 3,974 |
ECL allowance | 83 |
Consumer Loans [Member] | Leasing Transactions [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 133 |
ECL allowance | 22 |
Consumer Loans [Member] | Leasing Transactions [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 50 |
ECL allowance | 22 |
Consumer Loans [Member] | Installment Consumer Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 3,189,670 |
ECL allowance | 247,387 |
Net Assets | 2,942,283 |
Consumer Loans [Member] | Installment Consumer Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 2,693,260 |
ECL allowance | 50,748 |
Consumer Loans [Member] | Installment Consumer Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 231,107 |
ECL allowance | 48,622 |
Consumer Loans [Member] | Installment Consumer Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 265,303 |
ECL allowance | 148,017 |
Consumer Loans [Member] | Credit Card Balances [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,417,152 |
ECL allowance | 28,788 |
Net Assets | 1,388,364 |
Consumer Loans [Member] | Credit Card Balances [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 1,385,783 |
ECL allowance | 15,087 |
Consumer Loans [Member] | Credit Card Balances [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 14,977 |
ECL allowance | 4,961 |
Consumer Loans [Member] | Credit Card Balances [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 16,392 |
ECL allowance | 8,740 |
Consumer Loans [Member] | Other Consumer Loans [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 265,310 |
ECL allowance | 8,040 |
Net Assets | 257,720 |
Consumer Loans [Member] | Other Consumer Loans [Member] | Stage 1 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 258,723 |
ECL allowance | 4,986 |
Consumer Loans [Member] | Other Consumer Loans [Member] | Stage 2 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 2,822 |
ECL allowance | 767 |
Consumer Loans [Member] | Other Consumer Loans [Member] | Stage 3 [Member] |  |
Disclosure of financial assets [line items] |  |
Assets before allowances | 3,765 |
ECL allowance | $ 2,287 |

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