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Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Outstanding Exposures on Performance Guarantees [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period $ 2,283,390 $ 2,232,682
Net change on exposures (54,199) 84,753
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Foreign exchange adjustments (14,821) (34,045)
Exposure as at ending of period 2,214,370 2,283,390
Outstanding Exposures on Performance Guarantees [Member] | Stage 1 - Individual [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 1,804,374 1,685,980
Net change on exposures (33,951) 129,463
Transfer to Stage 1 128,944 249,755
Transfer to Stage 2 (314,572) (229,813)
Transfer to Stage 3 (459) (74)
Foreign exchange adjustments (11,278) (30,937)
Exposure as at ending of period 1,573,058 1,804,374
Outstanding Exposures on Performance Guarantees [Member] | Stage 1 - Group [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 44,325 54,523
Net change on exposures (8,832) (10,568)
Transfer to Stage 1 29,217 18,249
Transfer to Stage 2 (17,839) (17,111)
Transfer to Stage 3 (326) (729)
Foreign exchange adjustments (22) (39)
Exposure as at ending of period 46,523 44,325
Outstanding Exposures on Performance Guarantees [Member] | Stage 2 - Individual [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 420,427 485,075
Net change on exposures (6,254) (38,887)
Transfer to Stage 1 (128,944) (249,755)
Transfer to Stage 2 314,683 230,906
Transfer to Stage 3 (6,511) (3,884)
Foreign exchange adjustments (3,563) (3,028)
Exposure as at ending of period 589,838 420,427
Outstanding Exposures on Performance Guarantees [Member] | Stage 2 - Group [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 10,970 3,544
Net change on exposures 1,305 8,898
Transfer to Stage 1 (29,180) (18,092)
Transfer to Stage 2 18,347 17,417
Transfer to Stage 3 (826) (792)
Foreign exchange adjustments (1) (5)
Exposure as at ending of period 615 10,970
Outstanding Exposures on Performance Guarantees [Member] | Stage 3 - Individual [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 2,194 2,310
Net change on exposures (5,241) (2,950)
Transfer to Stage 1
Transfer to Stage 2 (111) (1,093)
Transfer to Stage 3 6,970 3,958
Foreign exchange adjustments 39 (31)
Exposure as at ending of period 3,851 2,194
Outstanding Exposures on Performance Guarantees [Member] | Stage 3 - Group [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 1,100 1,250
Net change on exposures (1,226) (1,203)
Transfer to Stage 1 (37) (157)
Transfer to Stage 2 (508) (306)
Transfer to Stage 3 1,152 1,521
Foreign exchange adjustments 4 (5)
Exposure as at ending of period 485 1,100
ECL exposures on Performance guarantees [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 4,037 4,080
Net change on exposures (3,235) (659)
Transfer to Stage 1
Transfer to Stage 2
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year 6,680 473
Changes to models and assumptions 5,639 137
Foreign exchange adjustments 3 6
Exposure as at ending of period 13,124 4,037
ECL exposures on Performance guarantees [Member] | Stage 1 - Individual [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 601 2,308
Net change on exposures 359 (1,717)
Transfer to Stage 1 48 287
Transfer to Stage 2 (222) (249)
Transfer to Stage 3 (2)
Impact on year-end ECL of exposures transferred between stages during the year 2 (18)
Changes to models and assumptions 2,002 (15)
Foreign exchange adjustments 7
Exposure as at ending of period 2,790 601
ECL exposures on Performance guarantees [Member] | Stage 1 - Group [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 277 509
Net change on exposures (160) (178)
Transfer to Stage 1 78 20
Transfer to Stage 2 (169) (233)
Transfer to Stage 3 (2) (22)
Impact on year-end ECL of exposures transferred between stages during the year 235 182
Changes to models and assumptions 658
Foreign exchange adjustments (1)
Exposure as at ending of period 917 277
ECL exposures on Performance guarantees [Member] | Stage 2 - Individual [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 1,440 765
Net change on exposures 6,341 767
Transfer to Stage 1 (48) (287)
Transfer to Stage 2 237 919
Transfer to Stage 3 (4,038) (192)
Impact on year-end ECL of exposures transferred between stages during the year 362 (684)
Changes to models and assumptions 2,138 152
Foreign exchange adjustments (10)
Exposure as at ending of period 6,422 1,440
ECL exposures on Performance guarantees [Member] | Stage 2 - Group [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 754
Net change on exposures (674) 789
Transfer to Stage 1 (68) (20)
Transfer to Stage 2 179 233
Transfer to Stage 3 (6) (17)
Impact on year-end ECL of exposures transferred between stages during the year (172) (231)
Changes to models and assumptions (10)
Foreign exchange adjustments
Exposure as at ending of period 3 754
ECL exposures on Performance guarantees [Member] | Stage 3 - Individual [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 491 495
Net change on exposures (8,647) (791)
Transfer to Stage 1
Transfer to Stage 2 (15) (670)
Transfer to Stage 3 4,038 194
Impact on year-end ECL of exposures transferred between stages during the year 6,261 1,263
Changes to models and assumptions 851
Foreign exchange adjustments 13
Exposure as at ending of period 2,992 491
ECL exposures on Performance guarantees [Member] | Stage 3 - Group [Member]    
Provisions (Details) - Schedule of change in gross carrying amount and ECL allowances [Line Items]    
Exposure as at beginning of period 474 3
Net change on exposures (454) 471
Transfer to Stage 1 (10)
Transfer to Stage 2 (10)
Transfer to Stage 3 8 39
Impact on year-end ECL of exposures transferred between stages during the year (8) (39)
Changes to models and assumptions
Foreign exchange adjustments
Exposure as at ending of period $ 474