XML 81 R55.htm IDEA: XBRL DOCUMENT v2.4.0.6
Finance Expenses (Detail) (USD $)
In Millions, unless otherwise specified
 6 Months Ended 12 Months Ended
Dec. 31, 2010
Dec. 31, 2011
Jun. 30, 2010
Jun. 30, 2009
Component of Other Expense, Nonoperating [Line Items]        
Interest expense-preference share dividend $ (3.1) $ (1.3) $ (5.9) $ (9.8)
Interest expense-other (33.3) (62.3) (65.8) (92.8)
Total finance expense (36.4) (63.6) (71.7) (137.5)
Capitalized interest 4.7 9.3 6.5 63.6
Finance expense (31.7) (54.3) (65.2) (73.9)
Mvelaphanda Resources Limited
        
Component of Other Expense, Nonoperating [Line Items]        
Interest expense-Mvelaphanda loan       $ (34.9)