Per Share Information (Tables)

12 Months Ended

Dec. 31, 2017

Profit or loss [abstract]

Schedule of Per Share Information

Net earnings per share for the year ended December 31, 2017 was calculated based on basic and diluted net earnings of $658 million, (2016 – $162 million) and the weighted average number of shares outstanding used in the calculation was based on the following:

(in millions)	2017		2016
Basic weighted average number of shares outstanding		862		842
Effect of dilutive stock options and restricted share units		3		3
Diluted weighted average number of shares outstanding		865		845