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Share-Based Payments - Summary of Fair Value of Equity Instruments Granted (Detail) (Detail) - Performance Shares [Member] - Gold Fields Limited 2012 Share Plan Amended [member] | 12 Months Ended
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Jan. 12, 2018 | Jan. 12, 2017 | Jan. 12, 2016
Monte Carlo simulation |  |  |
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) | 58.60% | 64.30% | 58.10%
expected term (years) | 3 years | 3 years | 3 years
dividend yield | n/a | n/a | n/a
weighted average three-year risk-free interest rate (based on US interest rates) | 2.00% | 1.60% | 0.50%
weighted average fair value (United States Dollar) | 5.0 | 4.2 | 2.6

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- Definition The percentage of an expected dividends used to calculate the fair value of share options granted. + References No definition available. + Details
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- Definition Expected term in months share options granted. + References No definition available. + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award fair value of equity instruments methodology. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award fair value of equity instruments weighted average fair value. + References No definition available. + Details
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- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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- Details
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