XML 91 R67.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Asset Impairments And Write-Offs (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Impairment Of Assets [Line Items] |  |  |  |  |  |
Asset impairment and write off | $ 215.3 |  | $ 41.6 |  | $ 9.5 |
Property, Plant and Equipment |  |  |  |  |  |
Impairment Of Assets [Line Items] |  |  |  |  |  |
Asset impairment and write off | 122.3 |  | 14.5 |  | 9.5 |
Damang - cash generating unit |  |  |  |  |  |
Impairment Of Assets [Line Items] |  |  |  |  |  |
Life of mine years | 6 years |  |  |  |  |
Damang - cash generating unit | Property, Plant and Equipment |  |  |  |  |  |
Impairment Of Assets [Line Items] |  |  |  |  |  |
Real discount rate | 8.00% |  |  |  |  |
Long-term gold price per ounce | 1,300 |  |  |  |  |
Resource valuation per ounce | 26 |  |  |  |  |
Asset impairment and write off | 53.0 | [1] |  | [1] |  | [1]
Non-refundable option payment to Bezant | Other |  |  |  |  |  |
Impairment Of Assets [Line Items] |  |  |  |  |  |
Asset impairment and write off | 9.5 |  |  |  |  |
Option expiration date | Jan. 31, 2014 |  |  |  |  |
Damang |  |  |  |  |  |
Impairment Of Assets [Line Items] |  |  |  |  |  |
Asset impairment and write off | 16.1 |  |  |  |  |
Tarkwa Mine |  |  |  |  |  |
Impairment Of Assets [Line Items] |  |  |  |  |  |
Asset impairment and write off | $ 2.4 |  |  |  |  |
[1] | As the undiscounted cash flows for Damang was less than its carrying value, the fair value of the asset group was calculated. The fair value of Damang was calculated using a combination of the market (comparable resource transactions) and the income (present value techniques) methods. The impairment was mainly due to the decrease in the gold price which impacted the life of mine plan. The key assumptions used in the calculation were as follows: - Real discount rate - 8% - Long-term gold price per ounce - $1,300 - Resource valuation per ounce - $26 - 2013 life of mine years - 6 The fair value calculation is very sensitive to the gold price assumption and an increase or decrease in the gold price could materially change the fair value.

X
- Definition Gold price per ounce used to find the present value of an amount to be paid or received in the future as an input to measure fair value. + References No definition available. + Details
Name: | gfi_FairValueInputsPricePerOunce
Namespace Prefix: | gfi_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Resource valuation per ounce used to find the present value of an amount to be paid or received in the future as an input to measure fair value. + References No definition available. + Details
Name: | gfi_FairValueInputsResourceValuationPerOunce
Namespace Prefix: | gfi_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | gfi_ImpairmentOfAssetsLineItems
Namespace Prefix: | gfi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Expiry date for exercising non-refundable option. + References No definition available. + Details
Name: | gfi_OptionExpirationDate
Namespace Prefix: | gfi_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueInputsDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration