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per share amounts (Tables)
12 Months Ended
Dec. 31, 2018
per share amounts  
Reconciliation of the denominators of the basic and diluted per share computations

 

 

 

 

 

 

Years ended December 31 (millions)

    

2018

    

2017

Basic total weighted average number of Common Shares outstanding

 

597

 

593

Effect of dilutive securities

 

 

 

 

Share option awards

 

 —

 

 —

Diluted total weighted average number of Common Shares outstanding

 

597

 

593