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v2.4.1.9

Senior Secured Revolving Credit Facility (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Debt Instrument [Line Items] |  |  |
Opening balance | $ 2,060.1 us-gaap_DebtLongtermAndShorttermCombinedAmount |  |
Loans advanced | 463.9 us-gaap_ProceedsFromIssuanceOfDebt | 3,177.7 us-gaap_ProceedsFromIssuanceOfDebt | 936.3 us-gaap_ProceedsFromIssuanceOfDebt
Loans repaid | (591.8)us-gaap_RepaymentsOfDebt | (2,971.3)us-gaap_RepaymentsOfDebt | (975.9)us-gaap_RepaymentsOfDebt
Closing balance | 1,910.9 us-gaap_DebtLongtermAndShorttermCombinedAmount | 2,060.1 us-gaap_DebtLongtermAndShorttermCombinedAmount |
$70 million senior secured revolving credit facility |  |  |
Debt Instrument [Line Items] |  |  |
Opening balance | 35.0 us-gaap_DebtLongtermAndShorttermCombinedAmount / us-gaap_LineOfCreditFacilityAxis = gfi_SeniorSecuredCreditFacilityMember |  |
Loans advanced | 35.0 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LineOfCreditFacilityAxis = gfi_SeniorSecuredCreditFacilityMember | 35.0 us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LineOfCreditFacilityAxis = gfi_SeniorSecuredCreditFacilityMember |
Loans repaid | (35.0)us-gaap_RepaymentsOfDebt / us-gaap_LineOfCreditFacilityAxis = gfi_SeniorSecuredCreditFacilityMember |  |
Closing balance | $ 35.0 us-gaap_DebtLongtermAndShorttermCombinedAmount / us-gaap_LineOfCreditFacilityAxis = gfi_SeniorSecuredCreditFacilityMember | $ 35.0 us-gaap_DebtLongtermAndShorttermCombinedAmount / us-gaap_LineOfCreditFacilityAxis = gfi_SeniorSecuredCreditFacilityMember |

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- Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |