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Gold Fields Management Scheme Options Outstanding (Detail) (GF Management Incentive Scheme) | 12 Months Ended
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Dec. 31, 2012 USD ($) | Dec. 31, 2012 ZAR | Dec. 31, 2012 Range 1 USD ($) | Dec. 31, 2012 Range 1 ZAR | Dec. 31, 2012 Range 2 USD ($) | Dec. 31, 2012 Range 2 ZAR | Dec. 31, 2012 Range 3 USD ($) | Dec. 31, 2012 Range 3 ZAR | Dec. 31, 2012 Range 4 USD ($) | Dec. 31, 2012 Range 4 ZAR
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding and exercisable options, lower limit |  |  | $ 7.00 | 60.00 | $ 9.93 | 85.00 | $ 12.84 | 110.00 | $ 15.76 | 135.00
Outstanding and exercisable options, upper limit |  |  | $ 9.92 | 84.99 | $ 12.83 | 109.99 | $ 15.75 | 134.99 | $ 18.67 | 159.99
Outstanding and exercisable options, weighted average exercise price | $ 10.09 | 86.51 | $ 7.71 | 66.07 | $ 10.48 | 89.80 | $ 13.03 | 111.66 | $ 16.41 | 140.66
Outstanding and exercisable options, Number of options | 75,500 | 75,500 | 34,500 | 34,500 | 21,800 | 21,800 | 14,000 | 14,000 | 5,200 | 5,200
Outstanding and exercisable options, contractual life | 3 months 29 days | 3 months 29 days | 4 months 10 days | 4 months 10 days | 6 months 11 days | 6 months 11 days | 15 days | 15 days | 2 months 1 day | 2 months 1 day

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- Definition Number of options outstanding, including both vested and non-vested options. + 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 Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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