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Carrying Value of Equity Investment in Far South East (Detail) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Opening balance | [1] |  | $ 250.5 |  |  |
Impairment |  |  | (109.5) |  | $ (7.4) |
Share of losses recognized for the year |  |  | (3.8) |  | (4.4) | $ (18.4)
Closing balance | [1] | $ 129.1 | 129.1 |  | 250.5 |
Far South East Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Opening balance |  |  | 230.0 |  | 230.0 |
Accumulated equity contribution |  |  | 75.4 |  | 72.1 |
Impairment |  | (101.4) | (101.4) | [2] |  |
Share of accumulated losses brought forward |  |  | (72.1) |  | (68.5) |
Share of losses recognized for the year |  |  | (3.3) |  | (3.6) |
Closing balance |  | $ 128.6 | $ 128.6 |  | $ 230.0 | $ 230.0
[1] | Equity investees comprise the following: Ownership % Market value Investment Description of business December 31, 2015 December 31, 2014 December 31, 2015 December 31, 2014 Far South East Exploration 40.0 40.0 128.6 * Rusoro Mining Limited Gold mining 26.4 26.4 5.0 1.8 Bezant Resources Plc1 Exploration 21.6 21.6 0.5 1.3 Hummingbird Resources Plc2 Exploration - 25.1 - 10.9 * - Not readily determinable. (1) During fiscal 2014, the investment in Bezant Resources Plc was impaired by $7.4 million to its fair value, as determined by its quoted market price. This impairment is considered other than temporary as the carrying value has been below the fair value for an extended period of time. (2) During fiscal 2014, Gold Fields acquired a 25.1% interest in Hummingbird Resources Plc (Refer note 3(c) for further details).
[2] | Following the identification of impairment indicators at December 31, 2015, the carrying value of FSE was impaired to its fair value which resulted in an impairment of $101.4 million. The fair value was indirectly derived from the market value of Lepanto Consolidated Mining Company, being the 60% shareholder of FSE.

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- Definition This item represents the entity's accumulated proportionate share of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied brought forward from prior years. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References No definition available. + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=49116238&loc=d3e32787-111569 + Details
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