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Net Loss Per Share
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Net Loss Per Share
Net Loss Per Share
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
 
$
 
$
 
$
 
$
Net loss attributable to the shareholders of Teekay Corporation - basic and diluted
(28,324
)
 
(80,152
)
 
(48,879
)
 
(125,408
)
Weighted average number of common shares
100,434,512

 
86,259,207

 
98,892,574

 
86,217,567

Common stock and common stock equivalents
100,434,512

 
86,259,207

 
98,892,574

 
86,217,567

Loss per common share - basic and diluted
(0.28
)
 
(0.93
)
 
(0.49
)
 
(1.45
)


The Company intends to settle the principal of the Convertible Notes in cash on conversion and calculates diluted earnings per share using the treasury-stock method. Stock-based awards and the conversion feature on the Convertible Notes that have an anti-dilutive effect on the calculation of diluted loss per common share, are excluded from this calculation. For the three and six months ended June 30, 2018, options to acquire 3.9 million shares of Teekay Common Stock had an anti-dilutive effect on the calculation of diluted income per common share (three and six months ended June 30, 2017 - 4.0 million). In periods where a loss attributable to shareholders of Teekay has been incurred, all stock-based awards and the conversion feature on the Convertible Notes are anti-dilutive.