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Provision For Environmental Rehabilitation (Tables) | 12 Months Ended
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Dec. 31, 2012
Reconciliation of Total Liability for Environmental Rehabilitation | The following is a reconciliation of the total liability for environmental rehabilitation:
|  | December 31, 2012 |  |  | December 31, 2011 |
Provision for environmental rehabilitation |  |  |  |  |  |  |  |
Opening balance |  |  | 336.9 |  |  |  | 324.4 |
Addition to liabilities |  |  | 18.1 |  |  |  | 18.7 |
Liabilities settled |  |  | (2.7 | ) |  |  | (1.7 | )
Accretion of liability |  |  | 28.2 |  |  |  | 24.9 |
Foreign currency translation adjustment |  |  | (6.9 | ) |  |  | (29.4 | )
Balance at close |  |  | 373.6 |  |  |  | 336.9 |

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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