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Weighted Average Number of Shares Diluted

12 Months Ended

Dec. 31, 2017

Earnings per share [abstract]

Weighted Average Number of Shares Diluted

WEIGHTED AVERAGE NUMBER OF SHARES DILUTED (in millions):

	2015			2016			2017
Weighted average number of shares (basic)	155.8			141.8			143.1
Dilutive effect of outstanding awards under stock-based compensation plans	2.1			2.1			2.1
Weighted average number of shares (diluted)	157.9			143.9			145.2

For the year ended December 31, 2017, we excluded 0.2 million of stock-based awards (year ended December 31, 2016 — 0.3 million; year ended December 31, 2015 — 0.1 million) from the diluted weighted average per share calculation as they were out-of-the-money.

References to shares in this note 23 are to our subordinate voting shares and our multiple voting shares taken collectively.

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The entire disclosure for earnings per share.

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