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Contingent Liabilities - Additional Information (Detail) (ZAR) In Millions, unless otherwise specified	Mar. 31, 2008 Randgold and Exploration Summons	Dec. 31, 2010 South Deep Gold Mine
Commitments and Contingencies Disclosure [Line Items]
Randgold and Exploration summons, highest claims	12,000
Randgold and Exploration summons, lowest claims	11,000
Randgold and Exploration summons, alternative claims	519
GFO interest in the South Deep Mine		50.00%

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The estimated maximum amount of possible loss for the highest claims from the contingency.

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The estimated minimum amount of possible loss for the highest claims from the contingency.

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Percentage stake in exploration project/asset.

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Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

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