Derivative Instruments and Hedging Activities - Narrative (Details) $ in Millions	Feb. 24, 2018 CAD ($)
Forward Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional value (CAD)	$ 6.8

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

No definition available.

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Period Type:	duration