XML 201 R194.htm IDEA: XBRL DOCUMENT v3.8.0.1
Correction of Methodology - Summary of Consolidated Income Statement (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of initial application of standards or interpretations [line items]      
Revenue $ 2,761.8 $ 2,666.4 [1] $ 2,454.1 [1]
Cost of sales (2,105.1) (2,001.2) [1] (1,988.5) [1]
Others [1]   (307.8) (456.7)
Profit before taxation 152.4 357.4 [1] 8.9 [1]
Mining and income taxation (173.2) (189.5) [1] (248.5) [1]
Profit/(loss) from continuing operations (20.8) 167.9 [1] (239.6) [1]
Profit/(loss) from discontinued operations, net of taxation 13.1 1.2 [1] (8.2) [1]
Profit/(loss) for the year (7.7) 169.1 [1] (247.8) [1]
Profit/(loss) attributable to:      
Owners of the parent (18.7) 158.2 [1] (247.3) [1]
Non controlling interest holders 11.0 10.9 [1] (0.5) [1]
Profit/(loss) $ (7.7) $ 169.1 [1] $ (247.8) [1]
Earnings/loss per share attributable to owners of the parent:      
Basic earnings/(loss) per share from continuing operations - cents $ (0.04) $ 0.19 [1] $ (0.31) [1]
Diluted earnings/(loss) per share from continuing operations - cents $ (0.04) $ 0.19 [1] $ (0.31) [1]
Previously Stated [member]      
Disclosure of initial application of standards or interpretations [line items]      
Revenue   $ 2,749.5 $ 2,545.4
Cost of sales   (2,066.7) (2,066.1)
Others   (317.0) (474.8)
Profit before taxation   365.8 4.5
Mining and income taxation   (192.1) (247.1)
Profit/(loss) from continuing operations   173.7 (242.6)
Profit/(loss) from discontinued operations, net of taxation   0.0 0.0
Profit/(loss) for the year   173.7 (242.6)
Profit/(loss) attributable to:      
Owners of the parent   162.8 (242.1)
Non controlling interest holders   10.9 (0.5)
Profit/(loss)   $ 173.7 $ (242.6)
Earnings/loss per share attributable to owners of the parent:      
Basic earnings/(loss) per share from continuing operations - cents   $ 0.20 $ (0.31)
Diluted earnings/(loss) per share from continuing operations - cents   $ 0.20 $ (0.31)
Adjustments [Member]      
Disclosure of initial application of standards or interpretations [line items]      
Revenue   $ 0.0 $ 0.0
Cost of sales   (6.6) (7.4)
Others   0.0  
Profit before taxation   (6.6) (7.4)
Mining and income taxation   2.0 2.2
Profit/(loss) from continuing operations   (4.6) (5.2)
Profit/(loss) from discontinued operations, net of taxation   0.0 0.0
Profit/(loss) for the year   (4.6) (5.2)
Profit/(loss) attributable to:      
Owners of the parent   (4.6) (5.2)
Non controlling interest holders   0.0 0.0
Profit/(loss)   $ (4.6) $ (5.2)
Earnings/loss per share attributable to owners of the parent:      
Basic earnings/(loss) per share from continuing operations - cents   $ (0.01) $ (0.01)
Diluted earnings/(loss) per share from continuing operations - cents   $ (0.01) $ (0.01)
As Restated Before Reclassification of Discontinued Operation [member]      
Disclosure of initial application of standards or interpretations [line items]      
Revenue   $ 2,749.5 $ 2,545.4
Cost of sales   (2,073.3) (2,073.5)
Others   (317.0) (474.8)
Profit before taxation   359.2 (2.9)
Mining and income taxation   (190.1) (244.9)
Profit/(loss) from continuing operations   169.1 (247.8)
Profit/(loss) from discontinued operations, net of taxation   0.0 0.0
Profit/(loss) for the year   169.1 (247.8)
Profit/(loss) attributable to:      
Owners of the parent   158.2 (247.3)
Non controlling interest holders   10.9 (0.5)
Profit/(loss)   $ 169.1 $ (247.8)
Earnings/loss per share attributable to owners of the parent:      
Basic earnings/(loss) per share from continuing operations - cents   $ 0.19 $ (0.32)
Diluted earnings/(loss) per share from continuing operations - cents   $ 0.19 $ (0.32)
Discontinued operation reclassification [member]      
Disclosure of initial application of standards or interpretations [line items]      
Revenue   $ (83.1) $ (91.3)
Cost of sales   72.1 85.0
Others   9.2 18.1
Profit before taxation   (1.8) 11.8
Mining and income taxation   0.6 (3.6)
Profit/(loss) from continuing operations   (1.2) 8.2
Profit/(loss) from discontinued operations, net of taxation   1.2 (8.2)
Profit/(loss) for the year   0.0 0.0
Profit/(loss) attributable to:      
Owners of the parent   0.0 0.0
Non controlling interest holders   0.0 0.0
Profit/(loss)   $ 0.0 $ 0.0
Earnings/loss per share attributable to owners of the parent:      
Basic earnings/(loss) per share from continuing operations - cents   $ 0.00 $ 0.01
Diluted earnings/(loss) per share from continuing operations - cents   $ 0.00 $ 0.01
[1] As Restated - Refer note 40 for further details.