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Transactions with Related Parties (Details) - CLP ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Loans and accounts receivable: |  |  |
Commercial loans | $ 400 |  |
Allowance for loan losses | 2,042 | $ 723 |
Companies Of The Group [Member] |  |  |
Loans and accounts receivable: |  |  |
Commercial loans | 246,868 | 122,289 | $ 80,076
Mortgage loans |  |  |
Consumer loans |  |  |
Loans and accounts receivable | 246,868 | 122,289 | 80,076
Allowance for loan losses | (122) | (308) | (209)
Net loans | 246,746 | 121,981 | 79,867
Guarantees | 462,513 | 442,854 | 361,452
Contingent loans: |  |  |
Personal guarantees |  |  |
Letters of credit | 4,112 | 5,392 | 19,251
Guarantees | 464,691 | 445,064 | 377,578
Contingent loans | 468,803 | 450,456 | 396,829
Allowance for contingent loans | (835) | (1) | (4)
Net contingent loans | 467,968 | 450,455 | 396,825
Associated Companies [Member] |  |  |
Loans and accounts receivable: |  |  |
Commercial loans | 375 | 459 | 771
Mortgage loans |  |  |
Consumer loans |  |  |
Loans and accounts receivable | 375 | 459 | 771
Allowance for loan losses | (182) | (9) | (9)
Net loans | 193 | 450 | 762
Guarantees |  |  |
Contingent loans: |  |  |
Personal guarantees |  |  |
Letters of credit |  |  |
Guarantees |  |  |
Contingent loans |  |  |
Allowance for contingent loans |  |  |
Net contingent loans |  |  |
Key Personnel [Member] |  |  |
Loans and accounts receivable: |  |  |
Commercial loans | 2,986 | 4,299 | 3,947
Mortgage loans | 20,473 | 18,814 | 18,796
Consumer loans | 5,781 | 5,335 | 4,310
Loans and accounts receivable | 29,240 | 28,448 | 27,053
Allowance for loan losses | (179) | (116) | (177)
Net loans | 29,061 | 28,332 | 26,876
Guarantees | 23,918 | 22,893 | 23,868
Contingent loans: |  |  |
Personal guarantees |  |  |
Letters of credit |  | 2,060 |
Guarantees |  | 3,364 |
Contingent loans |  | 5,424 |
Allowance for contingent loans |  | (18) |
Net contingent loans |  | 5,406 |
Other related parties [member] |  |  |
Loans and accounts receivable: |  |  |
Commercial loans | 685 | 233 | 7,793
Mortgage loans |  |  |
Consumer loans |  |  |
Loans and accounts receivable | 685 | 233 | 7,793
Allowance for loan losses | (10) | (5) | (18)
Net loans | 675 | 228 | 7,775
Guarantees | 288 | 7,171 | 7,164
Contingent loans: |  |  |
Personal guarantees |  |  |
Letters of credit | 63 | 44 | 33
Guarantees |  |  |
Contingent loans | 63 | 44 | 33
Allowance for contingent loans |  |  | 1
Net contingent loans | $ 63 | $ 44 | $ 34

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