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Loans to Customers at Amortized Cost - Changes in gross carrying amount and corresponding allowance for ECL (Details) - CLP ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Gross Carrying Amount    
Statement Line Items [Line Items]    
Total $ 30,033,272 $ 27,926,632
Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 15,438,398 13,960,818
Net change on Balance [1] 1,118,555 1,304,337
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 [2]
Changes to models and assumptions  
Amounts written off (55,698) (52,419)
Foreign exchange adjustments (207,043) 225,662
Subtotal Commercial loans 16,294,212 15,438,398
Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance 8,052,073 7,477,236
Net change on Balance [1] 1,162,444 581,830
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 [2]
Changes to models and assumptions  
Amounts written off (7,790) (6,993)
Foreign exchange adjustments
Subtotal Mortgage loans 9,206,727 8,052,073
Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance 4,436,161 4,013,459
Net change on Balance [1] 349,035 651,647
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 [2]  
Changes to models and assumptions
Amounts written off (249,712) (233,511)
Foreign exchange adjustments (3,151) 4,566
Subtotal Consumer loans 4,532,333 4,436,161
ECL    
Statement Line Items [Line Items]    
Total 649,233 585,378
ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 228,864 221,410
Net change on Balance [1] 35,779 11,488
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 [2] 29,160 43,116
Changes to models and assumptions 18,386  
Amounts written off (55,698) (52,419)
Foreign exchange adjustments (1,690) 5,269
Subtotal Commercial loans 254,801 228,864
ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance 34,330 33,777
Net change on Balance [1] 8,059 (4,056)
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 [2] 5,574 11,602
Changes to models and assumptions 3,535  
Amounts written off (7,790) (6,993)
Foreign exchange adjustments
Subtotal Mortgage loans 43,708 34,330
ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance 322,184 314,451
Net change on Balance [1] 152,138 68,099
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 [2] 126,401  
Changes to models and assumptions 173,078
Amounts written off (249,712) (233,511)
Foreign exchange adjustments (287) 67
Subtotal Consumer loans 350,724 322,184
Stage 1 [Member] | Individual [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 9,880,799 9,426,420
Stage 1 [Member] | Individual [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 9,426,420 8,446,627
Net change on Balance [1] 861,027 968,288
Transfer to Stage 1 873,349 681,223
Transfer to Stage 2 (1,120,580) (811,209)
Transfer to Stage 3 (2,593) (15,175)
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (150)
Foreign exchange adjustments (156,824) 156,816
Subtotal Commercial loans 9,880,799 9,426,420
Stage 1 [Member] | Individual [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
Stage 1 [Member] | Individual [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans
Stage 1 [Member] | Individual [Member] | ECL    
Statement Line Items [Line Items]    
Total 8,945 24,880
Stage 1 [Member] | Individual [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 24,880 16,527
Net change on Balance [1] (14,709) 9,424
Transfer to Stage 1 9,699 4,114
Transfer to Stage 2 (4,449) (2,600)
Transfer to Stage 3 (99) (70)
Impact on year-end ECL of exposures transferred between stages during the year [2] (7,346) (2,702)
Changes to models and assumptions 944  
Amounts written off (150)
Foreign exchange adjustments 25 337
Subtotal Commercial loans 8,945 24,880
Stage 1 [Member] | Individual [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
Stage 1 [Member] | Individual [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans
Stage 1 [Member] | Group [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 15,439,567 13,109,173
Stage 1 [Member] | Group [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 3,049,264 2,506,255
Net change on Balance [1] 452,929 780,778
Transfer to Stage 1 1,005,072 375,672
Transfer to Stage 2 (1,118,008) (602,997)
Transfer to Stage 3 (13,769) (16,665)
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (55) (67)
Foreign exchange adjustments (5,939) 6,288
Subtotal Commercial loans 3,369,494 3,049,264
Stage 1 [Member] | Group [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance 6,893,619 6,410,939
Net change on Balance [1] 1,312,226 734,990
Transfer to Stage 1 1,516,595 399,309
Transfer to Stage 2 (1,513,235) (651,619)
Transfer to Stage 3 (105)
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off  
Foreign exchange adjustments  
Subtotal Mortgage loans 8,209,100 6,893,619
Stage 1 [Member] | Group [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance 3,166,290 2,761,640
Net change on Balance [1] 493,973 1,007,548
Transfer to Stage 1 1,688,787 381,126
Transfer to Stage 2 (1,472,886) (978,112)
Transfer to Stage 3 (12,204) (9,340)
Impact on year-end ECL of exposures transferred between stages during the year [2]  
Changes to models and assumptions
Amounts written off (120) (104)
Foreign exchange adjustments (2,867) 3,532
Subtotal Consumer loans 3,860,973 3,166,290
Stage 1 [Member] | Group [Member] | ECL    
Statement Line Items [Line Items]    
Total 117,690 71,591
Stage 1 [Member] | Group [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 21,594 16,663
Net change on Balance [1] 3,915 12,463
Transfer to Stage 1 49,310 14,807
Transfer to Stage 2 (19,312) (11,606)
Transfer to Stage 3 (1,050) (1,189)
Impact on year-end ECL of exposures transferred between stages during the year [2] (36,508) (9,589)
Changes to models and assumptions (82)  
Amounts written off (55) (67)
Foreign exchange adjustments (69) 112
Subtotal Commercial loans 17,743 21,594
Stage 1 [Member] | Group [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance 724 740
Net change on Balance [1] 739 299
Transfer to Stage 1 16,318 892
Transfer to Stage 2 (742) (404)
Transfer to Stage 3
Impact on year-end ECL of exposures transferred between stages during the year [2] (15,913) (803)
Changes to models and assumptions 285  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans 1,411 724
Stage 1 [Member] | Group [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance 49,273 44,078
Net change on Balance [1] 60,685 40,305
Transfer to Stage 1 243,865 26,682
Transfer to Stage 2 (90,968) (44,301)
Transfer to Stage 3 (2,646) (2,024)
Impact on year-end ECL of exposures transferred between stages during the year [2] (161,427)  
Changes to models and assumptions (15,379)
Amounts written off (120) (104)
Foreign exchange adjustments (126) 16
Subtotal Consumer loans 98,536 49,273
Stage 2 [Member] | Individual [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 2,059,481 2,134,848
Stage 2 [Member] | Individual [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 2,134,848 2,228,401
Net change on Balance [1] (231,267) (254,542)
Transfer to Stage 1 (873,232) (680,838)
Transfer to Stage 2 1,130,960 822,133
Transfer to Stage 3 (65,157) (32,569)
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (65) (11)
Foreign exchange adjustments (36,606) 52,274
Subtotal Commercial loans 2,059,481 2,134,848
Stage 2 [Member] | Individual [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
Stage 2 [Member] | Individual [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans  
Stage 2 [Member] | Individual [Member] | ECL    
Statement Line Items [Line Items]    
Total 42,406 32,343
Stage 2 [Member] | Individual [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 32,343 31,252
Net change on Balance [1] (3,240) (5,045)
Transfer to Stage 1 (9,606) (3,981)
Transfer to Stage 2 7,184 8,805
Transfer to Stage 3 (10,055) (4,134)
Impact on year-end ECL of exposures transferred between stages during the year [2] 7,092 4,512
Changes to models and assumptions 18,860  
Amounts written off (65) (11)
Foreign exchange adjustments (107) 945
Subtotal Commercial loans 42,406 32,343
Stage 2 [Member] | Individual [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
Stage 2 [Member] | Individual [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans
Stage 2 [Member] | Group [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 1,757,169 2,429,234
Stage 2 [Member] | Group [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 460,251 408,337
Net change on Balance [1] 57,965 (105,114)
Transfer to Stage 1 (1,002,422) (346,936)
Transfer to Stage 2 1,168,875 630,963
Transfer to Stage 3 (121,315) (127,676)
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (371) (468)
Foreign exchange adjustments (1,152) 1,145
Subtotal Commercial loans 561,831 460,251
Stage 2 [Member] | Group [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance 993,085 904,826
Net change on Balance [1] (117,481) (115,034)
Transfer to Stage 1 (1,516,155) (397,363)
Transfer to Stage 2 1,532,523 671,775
Transfer to Stage 3 (69,448) (71,113)
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (6)
Foreign exchange adjustments
Subtotal Mortgage loans 822,524 993,085
Stage 2 [Member] | Group [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance 975,898 967,918
Net change on Balance [1] (212,059) (416,546)
Transfer to Stage 1 (1,679,389) (335,330)
Transfer to Stage 2 1,588,909 1,040,597
Transfer to Stage 3 (299,286) (281,144)
Impact on year-end ECL of exposures transferred between stages during the year [2]  
Changes to models and assumptions
Amounts written off (978) (627)
Foreign exchange adjustments (281) 1,030
Subtotal Consumer loans 372,814 975,898
Stage 2 [Member] | Group [Member] | ECL    
Statement Line Items [Line Items]    
Total 136,125 148,354
Stage 2 [Member] | Group [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 21,167 20,247
Net change on Balance [1] 5,054 (18,338)
Transfer to Stage 1 (48,694) (6,387)
Transfer to Stage 2 28,065 15,817
Transfer to Stage 3 (12,628) (13,572)
Impact on year-end ECL of exposures transferred between stages during the year [2] 39,878 23,822
Changes to models and assumptions (861)  
Amounts written off (371) (468)
Foreign exchange adjustments (83) 46
Subtotal Commercial loans 31,527 21,167
Stage 2 [Member] | Group [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance 16,895 17,351
Net change on Balance [1] 6,768 (8,772)
Transfer to Stage 1 (16,281) (758)
Transfer to Stage 2 2,239 2,112
Transfer to Stage 3 (2,770) (2,693)
Impact on year-end ECL of exposures transferred between stages during the year [2] 19,262 9,661
Changes to models and assumptions 3,250  
Amounts written off (6)
Foreign exchange adjustments
Subtotal Mortgage loans 29,363 16,895
Stage 2 [Member] | Group [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance 110,292 115,096
Net change on Balance [1] (48,295) (91,527)
Transfer to Stage 1 (240,444) (9,604)
Transfer to Stage 2 129,954 68,448
Transfer to Stage 3 (78,223) (72,629)
Impact on year-end ECL of exposures transferred between stages during the year [2] 203,042  
Changes to models and assumptions 101,086
Amounts written off (978) (627)
Foreign exchange adjustments (113) 49
Subtotal Consumer loans 75,235 110,292
Stage 3 [Member] | Individual [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 152,972 120,564
Stage 3 [Member] | Individual [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 120,564 162,231
Net change on Balance [1] (9,953) (81,058)
Transfer to Stage 1 (117) (385)
Transfer to Stage 2 (10,380) (10,924)
Transfer to Stage 3 67,750 47,744
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (8,587) (5,422)
Foreign exchange adjustments (6,305) 8,378
Subtotal Commercial loans 152,972 120,564
Stage 3 [Member] | Individual [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
Stage 3 [Member] | Individual [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans
Stage 3 [Member] | Individual [Member] | ECL    
Statement Line Items [Line Items]    
Total 47,296 32,694
Stage 3 [Member] | Individual [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 32,694 50,014
Net change on Balance [1] 7,859 (18,715)
Transfer to Stage 1 (93) (133)
Transfer to Stage 2 (2,734) (6,205)
Transfer to Stage 3 10,153 4,204
Impact on year-end ECL of exposures transferred between stages during the year [2] 9,378 5,505
Changes to models and assumptions  
Amounts written off (8,587) (5,422)
Foreign exchange adjustments (1,374) 3,446
Subtotal Commercial loans 47,296 32,694
Stage 3 [Member] | Individual [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
Stage 3 [Member] | Individual [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans
Stage 3 [Member] | Group [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 741,560 705,778
Stage 3 [Member] | Group [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 246,436 208,944
Net change on Balance [1] (13,173) (4,607)
Transfer to Stage 1 (2,650) (28,736)
Transfer to Stage 2 (50,867) (27,966)
Transfer to Stage 3 135,084 144,341
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (46,614) (46,301)
Foreign exchange adjustments (217) 761
Subtotal Commercial loans 267,999 246,436
Stage 3 [Member] | Group [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance 165,369 161,471
Net change on Balance [1] (32,301) (38,126)
Transfer to Stage 1 (440) (1,946)
Transfer to Stage 2 (19,288) (20,156)
Transfer to Stage 3 69,553 71,113
Impact on year-end ECL of exposures transferred between stages during the year [2]
Changes to models and assumptions  
Amounts written off (7,790) (6,987)
Foreign exchange adjustments
Subtotal Mortgage loans 175,103 165,369
Stage 3 [Member] | Group [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance 293,973 283,901
Net change on Balance [1] 67,033 60,645
Transfer to Stage 1 (9,398) (45,796)
Transfer to Stage 2 (116,023) (62,485)
Transfer to Stage 3 311,490 290,484
Impact on year-end ECL of exposures transferred between stages during the year [2]  
Changes to models and assumptions
Amounts written off (248,614) (232,780)
Foreign exchange adjustments (3) 4
Subtotal Consumer loans 298,458 293,973
Stage 3 [Member] | Group [Member] | ECL    
Statement Line Items [Line Items]    
Total 296,452 275,217
Stage 3 [Member] | Group [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 95,887 86,701
Net change on Balance [1] 36,913 31,406
Transfer to Stage 1 (616) (8,420)
Transfer to Stage 2 (8,754) (4,211)
Transfer to Stage 3 13,679 14,761
Impact on year-end ECL of exposures transferred between stages during the year [2] 16,666 21,568
Changes to models and assumptions (470)  
Amounts written off (46,614) (46,301)
Foreign exchange adjustments (82) 383
Subtotal Commercial loans 106,609 95,887
Stage 3 [Member] | Group [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance 16,711 15,686
Net change on Balance [1] 552 4,417
Transfer to Stage 1 (37) (134)
Transfer to Stage 2 (1,497) (1,708)
Transfer to Stage 3 2,770 2,693
Impact on year-end ECL of exposures transferred between stages during the year [2] 2,225 2,744
Changes to models and assumptions  
Amounts written off (7,790) (6,987)
Foreign exchange adjustments
Subtotal Mortgage loans 12,934 16,711
Stage 3 [Member] | Group [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance 162,619 155,277
Net change on Balance [1] 139,704 119,321
Transfer to Stage 1 (3,421) (17,078)
Transfer to Stage 2 (38,986) (24,147)
Transfer to Stage 3 80,869 74,653
Impact on year-end ECL of exposures transferred between stages during the year [2] 84,786  
Changes to models and assumptions 87,371
Amounts written off (248,614) (232,780)
Foreign exchange adjustments (48) 2
Subtotal Consumer loans 176,909 162,619
POCI [Member] | Gross Carrying Amount    
Statement Line Items [Line Items]    
Total 1,724 615
POCI [Member] | Gross Carrying Amount | Commercial Loans    
Statement Line Items [Line Items]    
Balance 615 23
Net change on Balance [1] 1,027 592
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 [2]
Changes to models and assumptions  
Amounts written off (6)
Foreign exchange adjustments
Subtotal Commercial loans 1,636 615
POCI [Member] | Gross Carrying Amount | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
POCI [Member] | Gross Carrying Amount | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1] 88
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans 88
POCI [Member] | ECL    
Statement Line Items [Line Items]    
Total 319 299
POCI [Member] | ECL | Commercial Loans    
Statement Line Items [Line Items]    
Balance 299 6
Net change on Balance [1] (13) 293
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 [2]
Changes to models and assumptions (5)  
Amounts written off (6)
Foreign exchange adjustments
Subtotal Commercial loans 275 299
POCI [Member] | ECL | Mortgage loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1]
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 [2]
Changes to models and assumptions  
Amounts written off
Foreign exchange adjustments
Subtotal Mortgage loans
POCI [Member] | ECL | Consumer loans    
Statement Line Items [Line Items]    
Balance
Net change on Balance [1] 44
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 [2]  
Changes to models and assumptions
Amounts written off
Foreign exchange adjustments
Subtotal Consumer loans $ 44
[1] Net change between assets originated and assets repaid, excluding write offs.
[2] Represents the change in the year-end ECLs of exposures that were transferred from one stage to another during the year.