Equity attributable   Non-    
  Share   Share   Other   Retained   to owners   controlling    
Rm capital   premium   reserves   profit   of the parent   interests   Total
                           
Balance as at December 2015 (Audited) 2.2   675.1   735.3   4,223.4   5,636.0   155.1   5,791.1
Dividends declared       (404.4)   (404.4)   (48.5)   (452.9)
Total comprehensive income     (364.6)   1,308.2   943.6   14.4   958.0
Changes in non-controlling interests     (132.3)     (132.3)   (45.4)   (177.7)
IFRS 2 charge and Share Trust transactions     198.5   (28.1)   170.4     170.4
Treasury shares acquired   (106.1)   0.9     (105.2)     (105.2)
Balance as at December 2016 (Audited) 2.2   569.0   437.8   5,099.1   6,108.1   75.6   6,183.7
Dividends declared       (488.1)   (488.1)   (34.2)   (522.3)
Total comprehensive income     (46.3)   333.2   286.9   3.9   290.8
Changes in non-controlling interests     (100.5)     (100.5)   (9.5)   (110.0)
IFRS 2 charge and Share Trust transactions   (151.5)   102.0   (32.0)   (81.5)     (81.5)
Treasury shares acquired   53.6   (0.2)   (1.0)   52.4     52.4
                           
Period ended June 2017 (Reviewed) 2.2   471.1   392.8   4,911.2   5,777.3   35.8   5,813.1
                           
Balance as at December 2015 (Audited) 2.2   675.1   735.3   4,223.4   5,636.0   155.1   5,791.1
Dividends declared       (243.6)   (243.6)   (31.2)   (274.8)
Total comprehensive income     (263.4)   356.2   92.8   21.1   113.9
Changes in non-controlling interests (note 4)     (132.8)     (132.8)   (45.3)   (178.1)
IFRS 2 charge and Share Trust transactions     105.1   (26.2)   78.9     78.9
Treasury shares acquired   (27.8)   0.5     (27.3)     (27.3)
                           
Period ended June 2016 (Reviewed) 2.2   647.3   444.7   4,309.8   5,404.0   99.7   5,503.7