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Contingent Liabilities - Additional Information (Detail) (ZAR) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2013 Application | Dec. 31, 2012 Application | Mar. 31, 2008 South Deep Gold Mine | Mar. 31, 2008 Randgold and Exploration Summons
Commitments and Contingencies Disclosure [Line Items] |  |  |  |
Number of court applications | 2 | 2 |  |
Plaintiffs claim amount | 25,000,000 |  |  |
Interest rate | 15.50% |  |  |
Randgold and Exploration summons, highest claims |  |  |  | 12,000,000,000
Randgold and Exploration summons, lowest claims |  |  |  | 11,000,000,000
Randgold and Exploration summons, alternative claims |  |  |  | 519,000,000
Ownership Interests, percent |  |  | 50.00% |

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