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RECENT ACCOUNTING PRONOUNCEMENTS - Financial Instruments (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($)
Forecast | IFRS 9 |
Adjustment to retained earnings | $ 56.3

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- Definition The amount of adjustment to opening balance of retained earnings on adoption of IFRS 9. + References No definition available. + Details
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Namespace Prefix: | kgc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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_NewIFRSsAxis=kgc_AccountingStandardUpdateIfrs9Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |