SHARE-BASED PAYMENTS - Share option plan (Details) shares in Millions	12 Months Ended
Dec. 31, 2022 shares
Share-based payment transaction
Term of share options	7
Share option
Share-based payment transaction
Ratio of options granted exercisable each year	33.33%
Commencement period for exercise of options	1 year
Number of common shares available for grant of options	15.8
Share option \| Maximum
Share-based payment transaction
Aggregate number of shares reserved for issuance	31.2
The aggregate percentage of common shares reserved for issuance under the plan	10

The option life of share options granted.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2022-03-24
-Paragraph 47
-Subparagraph a
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2022-en-r&anchor=para_47_a_i&doctype=Standard
-URIDate 2022-03-24

+ Details

Name:	ifrs-full_DescriptionOfOptionLifeShareOptionsGranted
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The commencement date of exercise of options in a share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	kgc_CommencementPeriodForExerciseOfOptionsInShareBasedPaymentArrangement
Namespace Prefix:	kgc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares authorized for issuance under share-based payment arrangement.

+ References

No definition available.

+ Details

Name:	kgc_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix:	kgc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

No definition available.

+ Details

Name:	kgc_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	kgc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum percentage of shares that may be issued in accordance with the plan as a proportion of outstanding total number of common shares.

+ References

No definition available.

+ Details

Name:	kgc_PercentageOfAggregateNumberOfCommonSharesReservedForIssuanceInShareBasedPaymentArrangement
Namespace Prefix:	kgc_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

The ratio of options granted that are exercisable by the option holder in share based payment arrangement.

+ References

No definition available.

+ Details

Name:	kgc_RatioOfExercisableOptionsGrantedInShareBasedPaymentArrangement
Namespace Prefix:	kgc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=kgc_IfrsShareBasedPaymentArrangementOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: