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Current Taxes and Deferred Taxes - Reconciliation of effective tax rate (Details) - CLP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Tax rate % |  |  |  |
Income tax calculated on net income before tax (as a percent) |  | 27.00% | 27.00% | 25.50%
Subordinated Debt Payment (as a percent) | [1] |  | (3.21%) | (5.67%)
Additions or deductions (as a percent) | [2] | (5.10%) | (4.18%) | (2.88%)
Effect of changes in tax rate (as a percent) |  |  |  | (0.83%)
Other (as a percent) |  | 0.43% | 1.32% | 0.67%
Effective rate and income tax expense (as a percent) |  | 22.34% | 20.93% | 16.79%
Credit to Income for tax rate change |  |  |  |
Income tax calculated on net income before tax |  | $ 209,901 | $ 206,116 | $ 175,298
Subordinated Debt Payment | [1] |  | (24,515) | (38,997)
Additions or deductions | [2] | (39,612) | (31,894) | (19,794)
Effect of changes in tax rate |  |  |  | (5,729)
Other |  | 3,372 | 10,061 | 4,583
Effective rate and income tax expense |  | $ 173,661 | $ 159,768 | $ 115,361
[1] | The tax expense related to the subordinated debt held by SAOS S.A, it ended during the current fiscal year, as a result of the generation of sufficient resources to pay off the total debt.
[2] | The deductions of the tax rate for 2017, 2018 and 2019 mainly relate to permanent differences between tax and financial accounting rules.

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