XML 163 R128.htm IDEA: XBRL DOCUMENT v3.3.1.900
Contingent Liabilities - Additional Information (Detail)
 12 Months Ended
Oct. 17, 2014
Application
Actions
Dec. 31, 2015
USD ($)
Dec. 31, 2015
ZAR
Dec. 31, 2014
Application
Dec. 31, 2012
Application
Aug. 21, 2008
USD ($)
Aug. 21, 2008
ZAR
Loss Contingencies [Line Items]              
Number of court actions | Actions 2            
Number of consolidated court applications 1            
South Deep Gold Mine              
Loss Contingencies [Line Items]              
Ownership Interests, percent   50.00% 50.00%        
Randgold and Exploration Summons              
Loss Contingencies [Line Items]              
Randgold and Exploration summons, highest claims           $ 800,000,000 ZAR 12,000,000,000
Randgold and Exploration summons, lowest claims           700,000,000 11,000,000,000
Randgold and Exploration summons, alternative claims           $ 34,000,000 ZAR 519,000,000
Silicosis [Member]              
Loss Contingencies [Line Items]              
Number of court applications       2 2    
Plaintiffs claim amount   $ 2,000,000 ZAR 25,000,000        
Interest rate   15.50% 15.50%