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Details of Performance Vesting Restricted Shares and Share Appreciation Rights Granted under Share Plan (Detail)
 12 Months Ended
Dec. 31, 2013
Stock Appreciation Rights
ZAR
Dec. 31, 2012
Stock Appreciation Rights
ZAR
Dec. 31, 2011
Stock Appreciation Rights
ZAR
Dec. 31, 2013
2005 Share Plan
USD ($)
Dec. 31, 2013
2005 Share Plan
ZAR
Dec. 31, 2012
2005 Share Plan
USD ($)
Dec. 31, 2012
2005 Share Plan
ZAR
Dec. 31, 2011
2005 Share Plan
USD ($)
Dec. 31, 2011
2005 Share Plan
ZAR
Dec. 31, 2013
2005 Share Plan
Restricted Stock
Dec. 31, 2012
2005 Share Plan
Restricted Stock
Dec. 31, 2011
2005 Share Plan
Restricted Stock
Dec. 31, 2013
2005 Share Plan
Stock Appreciation Rights
USD ($)
Dec. 31, 2013
2005 Share Plan
Stock Appreciation Rights
ZAR
Dec. 31, 2012
2005 Share Plan
Stock Appreciation Rights
USD ($)
Dec. 31, 2012
2005 Share Plan
Stock Appreciation Rights
ZAR
Dec. 31, 2011
2005 Share Plan
Stock Appreciation Rights
Number of Options                                  
Beginning Balance                   4,986,216 7,369,112 7,650,081 4,318,909 4,318,909 5,030,143 5,030,143 5,270,597
Spin-off of Sibanye Gold - forfeited                   (2,221,264)     (1,077,878) (1,077,878)      
Granted during the period                       3,165,342         1,638,484
Additional awards due to spin-off of Sibanye                   538,562     465,346 465,346      
Exercised and released                   (1,857,614) (1,798,082) (2,559,552)     (259,455) (259,455) (1,247,317)
Forfeited                   (214,929) (584,814) (886,759) (554,649) (554,649) (451,779) (451,779) (631,621)
Ending Balance                   1,230,971 4,986,216 7,369,112 3,151,728 3,151,728 4,318,909 4,318,909 5,030,143
Average price                                  
Average price, at beginning of year       119.17 $ 12.53 107.37 $ 13.27 107.91 $ 15.63 105.53       $ 12.53 107.37      
Spin-off of Sibanye Gold - forfeited       $ 11.99 106.58                        
Granted during the period               $ 16.51 119.17                
Additional awards due to spin-off of Sibanye       $ 10.72 95.34                        
Exercised and released             $ 12.99 106.36 $ 15.38 111.06                
Forfeited       $ 10.61 101.83 $ 14.30 117.14 $ 15.33 110.69                
Average price, at end of year       119.17 $ 8.89 91.91 $ 12.53 107.37 $ 13.27 107.91       $ 8.89 91.91 $ 12.53 107.37