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Property and Equipment and Leased Assets and Lease Liabilities (Details) - Schedule of changes of rights over leased assets - CLP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Buildings    
Gross Balance    
Total   $ (18,722)
Buildings | Gross balance [Member]    
Gross Balance    
Beginning Balance $ 130,853 116,577
Additions 7,907 14,276
Write-downs [1] (15,538)  
Remeasurement (7)  
Total 123,215 130,853
Buildings | Accumulated Depreciation [Member]    
Gross Balance    
Beginning Balance (18,722)
Depreciation of the year [2] (18,867) (18,722)
Write-downs [2] 4,029  
Total (33,560)  
Net changes of the rights over leased assets 89,655 112,131
Floor space for ATMs    
Gross Balance    
Total   (9,091)
Floor space for ATMs | Gross balance [Member]    
Gross Balance    
Beginning Balance 41,960 27,920
Additions 1,319 14,040
Write-downs [1] (1,197)  
Remeasurement (1,637)  
Total 40,445 41,960
Floor space for ATMs | Accumulated Depreciation [Member]    
Gross Balance    
Beginning Balance (9,091)
Depreciation of the year [2] (7,774) (9,091)
Write-downs [2] 369  
Total (16,496)  
Net changes of the rights over leased assets 23,949 32,869
Total    
Gross Balance    
Total   (49,402)
Total | Gross balance [Member]    
Gross Balance    
Beginning Balance 200,067 144,497
Reclassification   26,332
Additions 10,073 30,041
Write-downs (18,257) [1] (803)
Remeasurement (1,644)  
Total 190,239 200,067
Total | Accumulated Depreciation [Member]    
Gross Balance    
Beginning Balance (49,402)
Reclassification   (21,546)
Depreciation of the year [2] (27,647) (28,472)
Write-downs 5,639 [2] 616
Total (71,410)  
Net changes of the rights over leased assets 118,829 150,665
Improvements to leased properties    
Gross Balance    
Total   (21,589)
Improvements to leased properties | Gross balance [Member]    
Gross Balance    
Beginning Balance 27,254  
Reclassification   26,332
Additions 847 1,725
Write-downs (1,522) [1] (803)
Total 26,579 27,254
Improvements to leased properties | Accumulated Depreciation [Member]    
Gross Balance    
Beginning Balance (21,589)
Reclassification   (21,546)
Depreciation of the year [2] (1,006) (659)
Write-downs 1,241 [2] 616
Total (21,354)  
Net changes of the rights over leased assets $ 5,225 $ 5,665
[1] See Note No.36 Depreciation, Amortization and Impairment. Does not include provision for impairment of Ch$1 million
[2] See Note No.36 Depreciation, Amortization and Impairment.