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EARNINGS PER SHARE (Details) - CAD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Earnings per share [abstract]
Numerator (basic) - Net income for the year	$ 2,043	$ 2,059
Denominator - Number of shares (in millions):
Weighted average number of shares outstanding - basic (in shares)	512,000,000	515,000,000
Employee stock options and restricted share units (in shares)	1,000,000	1,000,000
Weighted average number of shares outstanding - diluted (in shares)	513,000,000	516,000,000
Earnings per share:
Basic (in dollars per share)	$ 3.99	$ 4.00
Diluted (in dollars per share)	$ 3.97	$ 3.99
Dilutive effect of securities on earnings per share	$ 6	$ 2
Antidilutive securities (in shares)	1,077,875	37,715

X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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