The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_7&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of instruments issued by the entity that represent indebtedness.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_DebtSecurities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

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

- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2018-01-01
-Paragraph 17
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_17_d&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Period within maturity to redeem the borrowings, 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_BorrowingsRedeemablePeriodWithinMaturity
Namespace Prefix:	kgc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of premium add to redemption price that to be redeemed by the issuer.

+ References

No definition available.

+ Details

Name:	kgc_BorrowingsRedemptionPricePremiumPercentage
Namespace Prefix:	kgc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of borrowings to be repurchased by the issuer prior to maturity upon certain fundamental changes.

+ References

No definition available.

+ Details

Name:	kgc_BorrowingsRepurchasePricePercentage
Namespace Prefix:	kgc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

No definition available.

+ Details

Name:	kgc_IfrsDebtInstrumentRedemptionPricePercentage
Namespace Prefix:	kgc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	kgc_IfrsDebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	kgc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of proceeds from debt net of issuance costs

+ References

No definition available.

+ Details

Name:	kgc_IfrsProceedsFromDebtNetOfIssuanceCosts
Namespace Prefix:	kgc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ifrs-full_BorrowingsByNameAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
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:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=kgc_SeniorNotes4.50PercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=kgc_SeniorNotes5.125PercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=kgc_SeniorNotes5.950PercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=kgc_SeniorNotes6.875PercentageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM DEBT AND CREDIT FACILITIES - Senior notes (Details) - USD ($) $ in Millions		12 Months Ended
	Jul. 06, 2017	Dec. 31, 2018	Dec. 31, 2017
Long-term debt
Debt securities	$ 500.0
Principal amount		$ 1,746.3
Debt repayments		80.0	$ 500.0
Senior notes
Long-term debt
Principal amount		$ 1,750.0	$ 1,750.0
Redemption price (as a percent)		100.00%
Redeem of the principal amount (as a percent)		100.00%
Prior to maturity upon certain fundamental changes		101.00%
Senior notes \| Minimum
Long-term debt
Premium add to the redemption price (as a percent)		40.00%
Senior notes \| Maximum
Long-term debt
Premium add to the redemption price (as a percent)		50.00%
4.50% senior notes
Long-term debt
Debt securities	500.0
Interest Rates (as a percent)		4.50%	4.50%
Proceeds from debt net of issuance costs	$ 494.7
Principal amount		$ 500.0	$ 500.0
Redeemable period, before maturity date		3 months
5.125% senior notes
Long-term debt
Interest Rates (as a percent)		5.125%	5.125%
Principal amount		$ 500.0	$ 500.0
Redeemable period, before maturity date		3 months
5.950% senior notes
Long-term debt
Interest Rates (as a percent)		5.95%	5.95%
Principal amount		$ 500.0	$ 500.0
Redeemable period, before maturity date		3 months
6.875% senior notes
Long-term debt
Interest Rates (as a percent)		6.875%	6.875%
Principal amount		$ 250.0	$ 250.0
Redeemable period, before maturity date		6 months