XML 141 R65.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Tax Years Open for Assessments (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2011
SOUTH AFRICA |  |
Income Tax Examination [Line Items] |  |
Tax years open for assessments | 2001-2010 | [1]
GHANA |  |
Income Tax Examination [Line Items] |  |
Tax years open for assessments | All years open | [2]
AUSTRALIA |  |
Income Tax Examination [Line Items] |  |
Tax years open for assessments | 2002-2010 | [3]
PERU |  |
Income Tax Examination [Line Items] |  |
Tax years open for assessments | 2005-2010 | [4]
[1] | The South African Tax legislation allows the Revenue Authorities to reopen assessments issued for a period of up to 3 years after the assessments were issued.
[2] | The Ghanaian Tax Authorities have the right to examine and, if necessary, amend the income tax determined by the relevant Group entity for any year without limitation to the years which may be reassessed.
[3] | The Australian Tax Authorities have the right to examine and, if necessary, amend the income tax determined by the relevant Group entity in the last four years, as from the date the tax returns have been filed.
[4] | The Peruvian Tax Authorities have the right to examine and, if necessary, amend the income tax determined by the relevant Group entity in the last four years, as from the date the tax returns have been filed.

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

X
- Definition Identification, by major jurisdiction, of tax years that remain open to examination under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
Name: | us-gaap_OpenTaxYearsByMajorTaxJurisdiction
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration