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Risk Management - Risk Management Structure (Details) | 12 Months Ended
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Dec. 31, 2018 CLF ( ) director | Dec. 31, 2017
Risk Management |  |
Number of directors in Finance, International and Financial Risk Committee | 4 |
Minimum amount for review of approved application by Directors Credit Committee | | 750,000 |
Number of directors in Portfolio Risk Committee | 2 |
Maximum exposure to credit risk does not exceed (in percentage) | 10.00% | 10.00%

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- Definition Represents the percentage of maximum exposure to credit risk without taking into account guarantees or other credit enhancements by client or counterparty, does not exceed. + References No definition available. + Details
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Data Type: | num:percentItemType
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- Definition Minimum amount for review of approved applications by the Directors Credit Committee. + References No definition available. + Details
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Period Type: | duration

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- Definition Number of directors in Finance, International and Financial Risk Committee. + References No definition available. + Details
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Namespace Prefix: | bch_
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- Definition Number of directors in Portfolio Risk Committee. + References No definition available. + Details
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Namespace Prefix: | bch_
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Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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