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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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+ References

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The amount of non-derivative financial assets with fixed or determinable payments that are not quoted in an active market, other than: (a) those that the entity intends to sell immediately or in the near term, which shall be classified as held for trading, and those that the entity, upon initial recognition, designates as at fair value through profit or loss; (b) those that the entity, upon initial recognition, designates as available for sale; or (c) those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, which shall be classified as available for sale. An interest acquired in a pool of assets that are not loans or receivables (for example, an interest in a mutual fund or a similar fund) is not a loan or receivable. [Refer: Derivative financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 8
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_8_c&doctype=Standard&book=b
-URIDate 2018-03-16

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