UNITED STATES DOLLAR
    2016       2015       2014  
10. EARNINGS PER SHARE                
10.1 Basic earnings/(loss) per share – cents 20     (31)     2  
  Basic earnings/(loss) per share is calculated by dividing the earnings attributable to owners of the parent of US$162.8 million (2015: loss of US$242.1 million and 2014: profit of US$12.8 million) by the weighted average number of ordinary shares in issue during the year of 809,889,990 (2015: 774,763,151 and 2014: 769,141,871).                
10.2 Diluted basic earnings/(loss) per share – cents 20     (31)     2  
  Diluted basic earnings/(loss) per share is calculated on the basis of earnings attributable to owners of the parent of US$162.8 million (2015: loss of US$242.1 million and 2014: profit of US$12.8 million) and 810,082,191 (2015: 774,763,151 and 2014: 771,814,815) shares being the diluted number of ordinary shares in issue during the year.                
  The weighted average number of shares has been adjusted by the following to arrive at the diluted number of ordinary shares:                
  Weighted average number of shares 809,889,990     774,763,151     769,141,871  
  Share options in issue 192,201     1     2,672,944  
  Diluted number of ordinary shares 810,082,191     774,763,151     771,814,815  
10.3 Headline earnings/(loss) per share – cents 26     (4)     4  
  Headline earnings/(loss) per share is calculated on the basis of adjusted net earnings attributable to owners of the parent of US$208.4 million (2015: loss of US$28.2 million and 2014: earnings of US$27.3 million) and 809,889,990 (2015: 774,763,151 and 2014: 769,141,871) shares being the weighted average number of ordinary shares in issue during the year.                
  Net earnings/(loss) attributable to owners of the parent is reconciled to headline earnings as follows:                
  Long-form headline earnings/(loss) reconciliation                
  Net profit/(loss) attributable to owners of the parent 162.8     (242.1)     12.8  
  Profit on disposal of investments, net (2.3)     (0.1)     (5.1)  
     Gross (2.3)     (0.1)     (5.1)  
     Taxation effect          
  (Profit)/loss on disposal of assets, net (41.0)     0.5     0.9  
     Gross (48.0)     0.1     1.3  
     Taxation effect 7.0     0.2     (0.4)  
     Non-controlling interest effect     0.2      
  Impairment and write-off of investments and assets and other, net 88.9     213.5     18.7  
     Gross 124.0     243.9     22.4  
     Taxation effect (33.9)     (28.1)     (3.7)  
     Non-controlling interest effect (1.2)     (2.3)      
  Headline earnings/(loss) 208.4     (28.2)     27.3  
10.4 Diluted headline earnings/(loss) per share – cents 26     (4)     4  
  Diluted headline earnings/(loss) per share is calculated on the basis of headline earnings attributable to owners of the parent of US$208.4 million (2015: loss of US$28.2 million and 2014: earnings of US$27.3 million) and 810,082,191 (2015: 774,763,151 and 2014: 771,814,815) shares being the diluted number of ordinary shares in issue during the year.                
  1 Share option adjustments of 1,804,321 were excluded from the dilutive number of ordinary shares as they are anti-dilutive.