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OTHER LIABILITIES - Components of pension expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Defined benefit pension plan expense
Current service cost	$ 493	$ 326
Past service cost	8,754
Administrative expenses	106	119
Interest cost on defined benefit obligation	544	456
Interest on assets	(87)	(86)
Pension expense	$ 9,810	$ 815

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- Definition

The amount of administration expense making up defined benefit plan pension expense recognized in the income statement.

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No definition available.

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Name:	aem_AdministrationRecognizedInOperations
Namespace Prefix:	aem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

The amount of current service cost making up defined benefit Plan pension expense recognized in the income statement.

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No definition available.

+ Details

Name:	aem_CurrentServiceCostRecognizedInOperations
Namespace Prefix:	aem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- References

No definition available.

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Name:	aem_DefinedBenefitPlanPensionExpenseAbstract
Namespace Prefix:	aem_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

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No definition available.

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Namespace Prefix:	aem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

The amount of interest costs on defined benefit obligation plan pension expense recognized in the income statement.

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No definition available.

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Name:	aem_InterestCostOnDefinedBenefitObligationRecognizedInOperation
Namespace Prefix:	aem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

The amount of interest income on defined benefit plan assets recognized in income statement

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No definition available.

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Name:	aem_InterestOnAssetsRecognizedInOperations
Namespace Prefix:	aem_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Definition

The amount of past service cost making up defined benefit Plan pension expense recognized in the income statement.

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No definition available.

+ Details

Name:	aem_PastServiceCostRecognizedInOperations
Namespace Prefix:	aem_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration