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Employee Benefit Plans (Tables) | 12 Months Ended
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Dec. 31, 2012
Assumptions used to Value Options | The Group used the Black Scholes Model to value the SARS under the Gold Fields 2005 Share Plan. The inputs to the model for awards granted during the period were as follows:
|  | Fiscal Year Ended December 31, |  |  | Fiscal Year Ended December 31, |  |  | Six Months Ended December 31, |  |  | Fiscal Year Ended June 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |  |  | 2010 |
Weighted average exercise price - Rand |  |  | — |  |  |  | 119.17 |  |  |  | 93.89 |  |  |  | 90.84 |
Weighted average expected volatility (based on a statistical analysis of the share price on a weighted moving average basis for the expected term of the option) |  |  | — |  |  |  | 46.4 | % |  |  | 50.2 | % |  |  | 52.0 | %
Expected term (years) |  |  | — |  |  |  | 5.90 |  |  |  | 3.0 - 4.2 |  |  |  | 3.0 - 4.2 |
Long-term expected dividend yield |  |  | — |  |  |  | 1.70 | % |  |  | 1.00 | % |  |  | 1.00 | %
Weighted average risk free interest rate |  |  | — |  |  |  | 6.90 | % |  |  | 6.90 | % |  |  | 7.90 | %
Weighted average fair value - Rand |  |  | — |  |  |  | 51.66 |  |  |  | 55.06 |  |  |  | 43.82 |
The Group used the Monte-Carlo Simulation to value the PVRS under the Gold Fields 2005 Share Plan and the Gold Fields Limited 2005 Non-executive Director Share Plan. The inputs to the model for awards granted during the year were as follows:
|  | Fiscal Year Ended December 31, |  |  | Fiscal Year Ended December 31, |  |  | Six Months Ended December 31, |  |  | Fiscal Year Ended June 30, |
|  | 2012 |  |  | 2011 |  |  | 2010 |  |  | 2010 |
Weighted average expected volatility (based on a statistical analysis of the share price on a weighted moving average basis for the expected term of the option) |  |  | — |  |  |  | 64.1 | % |  |  | 50.1 | % |  |  | 50.4 | %
Expected term (years) |  |  | — |  |  |  | 3.0 |  |  |  | 3.0 |  |  |  | 3.0 |
Historical dividend yield |  |  | — |  |  |  | 1.70 | % |  |  | 1.90 | % |  |  | 1.40 | %
Weighted average risk free interest rate (based on U.S. interest rate) |  |  | — |  |  |  | 0.20 | % |  |  | 0.20 | % |  |  | 0.20 | %
Weighted average fair value - Rand |  |  | — |  |  |  | 206.27 |  |  |  | 191.38 |  |  |  | 155.78 |
Details of Performance Vesting Restricted Shares and Share Appreciation Rights Granted under Share Plan | Details of the PVRS and SARS granted under this Plan are as follows:
|  | Number of PVRS |  |  | Number of SARS |  |  | Average price |
|  |  |  | Rand |  |  | $ |
Outstanding at June 30, 2009 |  |  | 6,831,964 |  |  |  | 4,609,626 |  |  |  | 111.50 |  |  |  | 13.83 |
Granted during the year |  |  | 3,177,552 |  |  |  | 1,564,217 |  |  |  | 90.84 |  |  |  | 11.98 |
Exercised and released |  |  | (341,309 | ) |  |  | — |  |  |  | — |  |  |  | — |
Forfeited |  |  | (619,793 | ) |  |  | (513,571 | ) |  |  | 109.40 |  |  |  | 14.43 |
Conditions for vesting not met |  |  | (609,751 | ) |  |  | — |  |  |  | — |  |  |  | — |
Outstanding at June 30, 2010 |  |  | 8,438,663 |  |  |  | 5,660,272 |  |  |  | 106.00 |  |  |  | 14.00 |
Granted during the period |  |  | 381,115 |  |  |  | 307,070 |  |  |  | 103.66 |  |  |  | 14.52 |
Exercised and released |  |  | (355,779 | ) |  |  | (13,329 | ) |  |  | 103.07 |  |  |  | 14.44 |
Forfeited |  |  | (753,918 | ) |  |  | (683,416 | ) |  |  | 104.01 |  |  |  | 14.57 |
Conditions for vesting not met |  |  | (60,000 | ) |  |  | — |  |  |  | — |  |  |  | — |
Outstanding at December 31, 2010 |  |  | 7,650,081 |  |  |  | 5,270,597 |  |  |  | 105.53 |  |  |  | 15.63 |
Granted during the period |  |  | 3,165,342 |  |  |  | 1,638,484 |  |  |  | 119.17 |  |  |  | 16.51 |
Exercised and released |  |  | (2,559,552 | ) |  |  | (1,247,317 | ) |  |  | 111.06 |  |  |  | 15.38 |
Forfeited |  |  | (886,759 | ) |  |  | (631,621 | ) |  |  | 110.69 |  |  |  | 15.33 |
Outstanding at December 31, 2011 |  |  | 7,369,112 |  |  |  | 5,030,143 |  |  |  | 107.91 |  |  |  | 13.27 |
Exercised and released |  |  | (1,798,082 | ) |  |  | (259,455 | ) |  |  | 106.36 |  |  |  | 12.99 |
Forfeited |  |  | (584,814 | ) |  |  | (451,779 | ) |  |  | 117.14 |  |  |  | 14.30 |
Outstanding at December 31, 2012 |  |  | 4,986,216 |  |  |  | 4,318,909 |  |  |  | 107.37 |  |  |  | 12.53 |
Directors Affected by Gold Fields Management Scheme Modification | The following executive directors were affected by the modification:
|  | Number of options |  |  | Average instrument price (cps) R |  |  | Average instrument price (cps) $ |  |  | Contractual life extended by (years) |
NJ Holland |  |  | 49,000 |  |  |  | 109.66 |  |  |  | 12.80 |  |  |  | 0.06 |
PA Schmidt |  |  | 43,310 |  |  |  | 108.67 |  |  |  | 12.68 |  |  |  | 0.06 |
Summarize Information relating to Options Outstanding | The following tables summarize information relating to the options outstanding at December 31, 2012.
|  | Outstanding options |
|  | Price range |  |  | Number of options |  |  | Contractual life |  |  | Weighted average exercise price |
|  | Rand |  |  | $ |  |  |  | (in years) |  |  | Rand |  |  | $ |
Range of prices |  |  | 60.00 - 84.99 |  |  |  | 7.00 - 9.92 |  |  |  | 3,400 |  |  |  | 1.95 |  |  |  | 69.48 |  |  |  | 8.11 |
|  |  | 85.00 - 109.99 |  |  |  | 9.93 - 12.83 |  |  |  | 2,625,234 |  |  |  | 2.52 |  |  |  | 99.45 |  |  |  | 11.60 |
|  |  | 110.00 - 134.99 |  |  |  | 12.84 - 15.75 |  |  |  | 1,652,471 |  |  |  | 3.72 |  |  |  | 119.65 |  |  |  | 13.96 |
|  |  | 135.00 - 159.99 |  |  |  | 15.76 - 18.67 |  |  |  | 37,804 |  |  |  | 5.01 |  |  |  | 136.29 |  |  |  | 15.90 |
Total |  |  |  |  |  |  |  |  |  |  | 4,318,909 |  |  |  | 3.00 |  |  |  | 107.48 |  |  |  | 12.53 |
Options Granted under Gold Fields Management Incentive Scheme | Details of the options granted under the GF Management Incentive Scheme are as follows:
|  | Number of Options |  |  | Average option price |
|  |  | Rand |  |  | $ |
Outstanding at June 30, 2009 |  |  | 2,304,421 |  |  |  | 77.20 |  |  |  | 9.58 |
Exercised and released |  |  | (778,172 | ) |  |  | 74.62 |  |  |  | 9.84 |
Forfeited |  |  | (173,616 | ) |  |  | 97.01 |  |  |  | 12.80 |
Outstanding at June 30, 2010 |  |  | 1,352,633 |  |  |  | 76.15 |  |  |  | 10.06 |
Exercised and released |  |  | (348,430 | ) |  |  | 75.40 |  |  |  | 10.56 |
Forfeited |  |  | (27,670 | ) |  |  | 96.06 |  |  |  | 13.45 |
Outstanding at December 31, 2010 |  |  | 976,533 |  |  |  | 75.85 |  |  |  | 11.24 |
Exercised and released |  |  | (614,340 | ) |  |  | 72.33 |  |  |  | 10.02 |
Forfeited |  |  | (50,968 | ) |  |  | 118.63 |  |  |  | 16.43 |
Outstanding at December 31, 2011 |  |  | 311,225 |  |  |  | 73.48 |  |  |  | 9.04 |
Exercised and released |  |  | (204,570 | ) |  |  | 68.60 |  |  |  | 8.38 |
Forfeited |  |  | (31,155 | ) |  |  | 73.91 |  |  |  | 9.02 |
Outstanding at December 31, 2012 |  |  | 75,500 |  |  |  | 86.51 |  |  |  | 10.09 |
Gold Fields Management Scheme Options Outstanding | The following tables summarize information relating to the options outstanding at December 31, 2012:
|  |  |  |  |  |  |  | Outstanding and exercisable options |
|  |  |  |  |  |  |  | Number of options |  |  | Contractual life (in years) |  |  | Weighted average exercise price |
|  | Rand |  |  | $ |  |  |  |  | Rand |  |  | $ |
Range of prices |  |  | 60.00 - 84.99 |  |  |  | 7.00 - 9.92 |  |  |  | 34,500 |  |  |  | 0.36 |  |  |  | 66.07 |  |  |  | 7.71 |
|  |  | 85.00 - 109.99 |  |  |  | 9.93 - 12.83 |  |  |  | 21,800 |  |  |  | 0.53 |  |  |  | 89.80 |  |  |  | 10.48 |
|  |  | 110.00 - 134.99 |  |  |  | 12.84 - 15.75 |  |  |  | 14,000 |  |  |  | 0.04 |  |  |  | 111.66 |  |  |  | 13.03 |
|  |  | 135.00 - 159.99 |  |  |  | 15.76 - 18.67 |  |  |  | 5,200 |  |  |  | 0.17 |  |  |  | 140.66 |  |  |  | 16.41 |
Total |  |  |  |  |  |  |  |  |  |  | 75,500 |  |  |  | 0.33 |  |  |  | 86.51 |  |  |  | 10.09 |
Restricted Shares Granted | Details of the restricted shares granted under this Plan are as follows:
|  | No. of restricted shares |
Outstanding at June 30, 2009 |  |  | 100,200 |
Granted during the year |  |  | 47,300 |
Exercised and released |  |  | (11,622 | )
Outstanding at June 30, 2010 |  |  | 135,878 |
Exercised and released |  |  | (37,000 | )
Outstanding at December 31, 2010 |  |  | 98,878 |
Exercised and released |  |  | (56,978 | )
Outstanding at December 31, 2011 |  |  | 41,900 |
Exercised and released |  |  | (29,600 | )
Outstanding at December 31, 2012 |  |  | 12,300 |
Valuation Technique Monte Carlo |
Assumptions used to Value Options | The Group uses the Monte-Carlo Simulation to value the Performance Shares. The inputs to the model for awards granted during the period were as follows:
|  | 2012 |
Weighted average historical volatility (based on a statistical analysis of the share price on a weighted moving average basis for the expected term of the option) |  |  | 36.4 | %
Expected term (years) |  |  | 3.00 |
Historical dividend yield |  |  | 1.60 | %
Weighted average three year risk free interest rate (based on US interest rates) |  |  | 0.70 | %
Weighted average fair value - Rand |  |  | R 162.14 |
A future trading model is used to estimate the loss in value to the holders of Bonus Shares due to trading restrictions. The actual valuation is developed using a Monte-Carlo analysis of the future share price of Gold Fields:
Weighted average historical volatility (based on a statistical analysis of the share price on a weighted moving average basis for the expected term of the option) |  |  | 29.4 | %
Expected term (months) |  |  | 9 - 18 |
Historical dividend yield |  |  | 2.70 | %
Weighted average three year risk free interest rate (based on SA interest rates) |  |  | 5.50 | %
Marketability discount |  |  | 1.6 | %
Weighted average fair value - Rand |  |  | R 115.61 |
Gf Non Executive Director Share Plan |
Details of Performance Shares and Bonus Shares Granted Under Share Plan | Details of the Performance shares and Bonus shares granted under this Plan are as follows:
|  | Number of Performance shares |  |  | Number of Bonus shares |
Outstanding at December 31, 2011 |  |  | — |  |  |  | — |
Granted during the year |  |  | 4,511,700 |  |  |  | 1,368,423 |
Exercised and released |  |  | — |  |  |  | (528,392 | )
Forfeited |  |  | (249,530 | ) |  |  | (47,655 | )
Outstanding at December 31, 2012 |  |  | 4,262,170 |  |  |  | 792,376 |
GF Non-Executive Director Share Plan |
Details of Gold Fields Non-Executive Director Share Plan | Details of the Plan are as follows:
|  | Number of Options |  |  | Average option price |
|  |  | Rand |  |  | $ |
Outstanding as of June 30, 2009 |  |  | 81,700 |  |  |  | 88.54 |  |  |  | 10.99 |
Outstanding as of June 30, 2010 |  |  | 81,700 |  |  |  | 88.54 |  |  |  | 11.70 |
Exercised and released |  |  | (20,000 | ) |  |  | 78.49 |  |  |  | 10.99 |
Forfeited |  |  | (25,000 | ) |  |  | 110.03 |  |  |  | 15.41 |
Outstanding as of December 31, 2010 |  |  | 36,700 |  |  |  | 79.37 |  |  |  | 11.76 |
Exercised and released |  |  | (36,700 | ) |  |  | 79.37 |  |  |  | 10.99 |
Outstanding as of December 31, 2011 and 2012 |  |  | — |  |  |  | — |  |  |  | — |

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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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