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REMUNERATION OF DIRECTORS AND SENIOR MANAGEMENT (Details) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Non-management directors
Disclosure of transactions between related parties [line items]
Fees earned and salary	$ 3	$ 2	$ 2
Senior management
Disclosure of transactions between related parties [line items]
Fees earned and salary	3	3	3
Common stock option based awards	10	9	7
Annual incentive plans	5	5	2
Long-term incentive plans	17	15	6
Total	$ 35	$ 32	$ 18

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Key Management Personnel Compensation, Annual Incentive Plans

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Key Management Personnel Compensation, Options Issued

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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.

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The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

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The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

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