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Options Granted under Gold Fields Management Incentive Scheme (Detail) (Gold Fields Management Incentive Scheme [Member])	6 Months Ended		12 Months Ended
	Dec. 31, 2010 USD ($)	Dec. 31, 2010 ZAR	Dec. 31, 2012 USD ($)	Dec. 31, 2012 ZAR	Dec. 31, 2011 USD ($)	Dec. 31, 2011 ZAR	Jun. 30, 2010 USD ($)	Jun. 30, 2010 ZAR
Number of Options
Beginning Balance	1,352,633	1,352,633	311,225	311,225	976,533	976,533	2,304,421	2,304,421
Exercised and released	(348,430)	(348,430)	(204,570)	(204,570)	(614,340)	(614,340)	(778,172)	(778,172)
Forfeited	(27,670)	(27,670)	(31,155)	(31,155)	(50,968)	(50,968)	(173,616)	(173,616)
Ending Balance	976,533	976,533	75,500	75,500	311,225	311,225	1,352,633	1,352,633
Average option price
Average price, at beginning of year	$ 10.06	76.15	$ 9.04	73.48	$ 11.24	75.85	$ 9.58	77.20
Exercised and released	$ 10.56	75.40	$ 8.38	68.60	$ 10.02	72.33	$ 9.84	74.62
Forfeited	$ 13.45	96.06	$ 9.02	73.91	$ 16.43	118.63	$ 12.80	97.01
Average price, at end of year	$ 11.24	75.85	$ 10.09	86.51	$ 9.04	73.48	$ 10.06	76.15

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Number of share options (or share units) exercised during the current period.

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