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Syndicated Revolving Credit Facility (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Opening balance	$ 2,060.1us-gaap_DebtLongtermAndShorttermCombinedAmount
Loans repaid	(591.8)us-gaap_RepaymentsOfDebt		(2,971.3)us-gaap_RepaymentsOfDebt		(975.9)us-gaap_RepaymentsOfDebt
Closing balance	1,910.9us-gaap_DebtLongtermAndShorttermCombinedAmount		2,060.1us-gaap_DebtLongtermAndShorttermCombinedAmount
$500 million syndicated revolving credit facility
Debt Instrument [Line Items]
Opening balance			104.0us-gaap_DebtLongtermAndShorttermCombinedAmount / us-gaap_DebtInstrumentAxis = gfi_SyndicatedRevolvingLoanFacilityMember
Loans repaid			(104.0)us-gaap_RepaymentsOfDebt / us-gaap_DebtInstrumentAxis = gfi_SyndicatedRevolvingLoanFacilityMember
Closing balance	$ 0us-gaap_DebtLongtermAndShorttermCombinedAmount / us-gaap_DebtInstrumentAxis = gfi_SyndicatedRevolvingLoanFacilityMember	[1]	$ 0us-gaap_DebtLongtermAndShorttermCombinedAmount / us-gaap_DebtInstrumentAxis = gfi_SyndicatedRevolvingLoanFacilityMember	[1]
[1] $500 million syndicated revolving credit facility On February 15, 2013, this facility was refinanced by drawing down under the $1,510 million term loan and revolving credit facility as detailed in 16(g). The facility was also cancelled on February 15, 2013. December 31, 2014 December 31, 2013 Opening balance - 104.0 Loans repaid - (104.0 ) Closing balance - -

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Represents the aggregate of total long-term debt, including current maturities and short-term debt.

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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.

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