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SHARE-BASED COMPENSATION (Black-Scholes option pricing model for the stock option grants) (Details)	12 Months Ended
	Dec. 31, 2017 CAD ($) year
Share-based Payment Arrangements [Abstract]
Exercise price (in CAD per share) | $	$ 29.01
Risk-free interest rate	1.90%
Expected volatility	20.78%
Expected life | year	4.63
Expected dividend yield	1.29%

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- Definition

Share-based Payment Arrangements [Abstract]

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No definition available.

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The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

+ References

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The option life of share options granted.

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The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

+ References

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The exercise price of share options granted.

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The percentage of an expected dividend used to calculate the fair value of share options granted.

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