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Earnings per share (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Summary of Earnings Per Share

The components of the numerator for the calculation of basic and diluted EPS are as follows:

 

(In $ millions)    Six Months Ended
June 30,		  
     2018      2017  

Net loss

      (477 )       (78 ) 

Less: Allocation to participating securities

      —          —    
  

 

 

     

 

 

  

Net loss available to shareholders

      (477 )       (78 ) 
  

 

 

     

 

 

  

Effect of dilution

      —          —    
  

 

 

     

 

 

  

Diluted net loss available to shareholders

      (477 )       (78 ) 
  

 

 

     

 

 

  

 

The components of the denominator for the calculation of basic and diluted EPS are as follows:

 

(In millions)    Six Months Ended
June 30,		  
     2018      2017  

Basic earnings per share:

      

Weighted average number of common shares outstanding

      504        504  

Diluted earnings per share:

      

Weighted average number of common shares outstanding

      504        504  

Effect of dilutive share options (1)

      —          —    

Effect of dilutive convertible bonds

      —          —    
  

 

 

     

 

 

  

Weighted average number of common shares outstanding adjusted for the effects of dilution

      504        504  
  

 

 

     

 

 

  

Basic (loss)/income per share (US dollar)

      (0.95 )       (0.16 ) 
  

 

 

     

 

 

  

Diluted (loss)/income per share (US dollar)

      (0.95 )       (0.16 ) 
  

 

 

     

 

 

  

 

(1)

Certain stock options have been excluded from the calculation of diluted EPS because their exercise price exceeded our average share price during the calculation period.