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Derivative Instruments and Accounting Hedges - Fair Value Hedges (Details) - Fair value hedge (Swaps) - CLP ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Cross currency swap |  |
Bank's portfolio of derivative instruments |  |
Notional Amounts | $ 13,914 | $ 16,721
Interest rate swap |  |
Bank's portfolio of derivative instruments |  |
Notional Amounts | 78,970 | 122,081
Commercial loans |  |
Bank's portfolio of derivative instruments |  |
Notional Amounts | 13,914 | 16,721
Corporate bonds |  |
Bank's portfolio of derivative instruments |  |
Notional Amounts | $ 78,970 | $ 122,081

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