XML 117 R98.htm IDEA: XBRL DOCUMENT v2.4.1.9
Carrying Value of Equity Investment (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]      
Carrying amount of investment $ 250.5us-gaap_EquityMethodInvestments [1] $ 237.5us-gaap_EquityMethodInvestments [1]  
Far South East Project [Member]      
Schedule of Equity Method Investments [Line Items]      
Carrying amount of investment 230.0us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gfi_FarSouthEastMember
230.0us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gfi_FarSouthEastMember
230.0us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gfi_FarSouthEastMember
Bezant Resources Plc      
Schedule of Equity Method Investments [Line Items]      
Carrying amount of investment 1.3us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gfi_BezantResourcePlcMember
7.5us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gfi_BezantResourcePlcMember
 
Hummingbird Resources Plc      
Schedule of Equity Method Investments [Line Items]      
Carrying amount of investment $ 19.2us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= gfi_HummingbirdResourcesPlcMember
   
[1] Equity investees comprise the following: Ownership % Market value Investment Description of business December 31, 2014 December 31, 2013 December 31, 2014 December 31, 2013 Far South East Exploration 40.0 40.0 * * Rusoro Mining Limited Gold mining 26.4 26.4 1.8 3.3 Bezant Resources Plc 1 Exploration 21.6 21.6 1.3 5.1 Hummingbird Resources Plc 2 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) Gold Fields acquired a 25.1% interest in Hummingbird Resources Plc (Refer note 3(c) for further details).