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SHARE-BASED PAYMENTS - Restricted share unit plan (Details) shares in Millions | Dec. 31, 2020 shares
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Maximum | Restricted share unit plan |
Share-based payment transaction |
Shares authorized (in shares) | 21.9

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
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Namespace Prefix: | kgc_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=kgc_RestrictedSharePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |