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Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).","units":{"USD":[{"end":"2009-12-31","val":31924000,"accn":"0001047469-11-002754","fy":2010,"fp":"FY","form":"20-F","filed":"2011-03-28","frame":"CY2009Q4I"},{"end":"2010-12-31","val":33390000,"accn":"0001047469-12-003484","fy":2011,"fp":"FY","form":"20-F","filed":"2012-03-29","frame":"CY2010Q4I"},{"end":"2010-12-31","val":33390000,"accn":"0001047469-11-002754","fy":2010,"fp":"FY","form":"20-F","filed":"2011-03-28"},{"end":"2011-12-31","val":47462000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":47462000,"accn":"0001047469-12-003484","fy":2011,"fp":"FY","form":"20-F","filed":"2012-03-29"},{"end":"2012-12-31","val":27372000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2012Q4I"},{"end":"2012-12-31","val":27372000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28"},{"end":"2013-12-31","val":16366000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2013Q4I"}]}},"AccruedReclamationCostsCurrent":{"label":"Accrued Reclamation Costs, Current","description":"Current portion of reclamation reserve to restore a mining or drilling site to the condition agreed upon within the mining or drilling contract.","units":{"USD":[{"end":"2011-09-30","val":44400000,"accn":"0001047469-11-009311","fy":2011,"fp":"Q3","form":"6-K","filed":"2011-11-09","frame":"CY2011Q3I"},{"end":"2011-12-31","val":26069000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28","frame":"CY2011Q4I"},{"end":"2011-12-31","val":26069000,"accn":"0001047469-12-010054","fy":2012,"fp":"Q3","form":"6-K","filed":"2012-11-05"},{"end":"2011-12-31","val":26069000,"accn":"0001047469-12-007959","fy":2012,"fp":"Q2","form":"6-K","filed":"2012-08-08"},{"end":"2011-12-31","val":26069000,"accn":"0001047469-12-005542","fy":2012,"fp":"Q1","form":"6-K","filed":"2012-05-08"},{"end":"2011-12-31","val":26069000,"accn":"0001047469-12-003484","fy":2011,"fp":"FY","form":"20-F","filed":"2012-03-29"},{"end":"2012-03-31","val":39746000,"accn":"0001047469-12-005542","fy":2012,"fp":"Q1","form":"6-K","filed":"2012-05-08","frame":"CY2012Q1I"},{"end":"2012-06-30","val":32953000,"accn":"0001047469-12-007959","fy":2012,"fp":"Q2","form":"6-K","filed":"2012-08-08","frame":"CY2012Q2I"},{"end":"2012-09-30","val":9275000,"accn":"0001047469-12-010054","fy":2012,"fp":"Q3","form":"6-K","filed":"2012-11-05","frame":"CY2012Q3I"},{"end":"2012-12-31","val":16816000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2012Q4I"},{"end":"2012-12-31","val":16816000,"accn":"0001047469-13-010402","fy":2013,"fp":"Q3","form":"6-K","filed":"2013-11-08"},{"end":"2012-12-31","val":16816000,"accn":"0001047469-13-008312","fy":2013,"fp":"Q2","form":"6-K","filed":"2013-08-09"},{"end":"2012-12-31","val":16816000,"accn":"0001047469-13-005913","fy":2013,"fp":"Q1","form":"6-K","filed":"2013-05-10"},{"end":"2012-12-31","val":16816000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28"},{"end":"2013-03-31","val":14158000,"accn":"0001047469-13-005913","fy":2013,"fp":"Q1","form":"6-K","filed":"2013-05-10","frame":"CY2013Q1I"},{"end":"2013-06-30","val":11022000,"accn":"0001047469-13-008312","fy":2013,"fp":"Q2","form":"6-K","filed":"2013-08-09","frame":"CY2013Q2I"},{"end":"2013-09-30","val":8503000,"accn":"0001047469-13-010402","fy":2013,"fp":"Q3","form":"6-K","filed":"2013-11-08","frame":"CY2013Q3I"},{"end":"2013-12-31","val":3452000,"accn":"0001047469-14-006866","fy":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11","frame":"CY2013Q4I"},{"end":"2013-12-31","val":3452000,"accn":"0001047469-14-004840","fy":2014,"fp":"Q1","form":"6-K","filed":"2014-05-12"},{"end":"2013-12-31","val":3452000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26"},{"end":"2014-03-31","val":1855000,"accn":"0001047469-14-004840","fy":2014,"fp":"Q1","form":"6-K","filed":"2014-05-12","frame":"CY2014Q1I"},{"end":"2014-06-30","val":1934000,"accn":"0001047469-14-006866","fy":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11","frame":"CY2014Q2I"}]}},"AccruedSalariesCurrent":{"label":"Accrued Salaries, Current","description":"Carrying value as of the balance sheet date of the obligations incurred through that date and payable for employees' services provided. 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Includes only common stock transactions (excludes preferred stock transactions). 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y":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11","frame":"CY2014Q2I"}]}},"ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax":{"label":"Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax","description":"Amount before tax of reclassification adjustments of other comprehensive income (loss).","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":-878000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2012"},{"start":"2013-01-01","end":"2013-12-31","val":-34718000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":-437000,"accn":"0001047469-14-004840","fy":2014,"fp":"Q1","form":"6-K","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":2065000,"accn":"0001047469-14-006866","fy":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11"}]}},"RecordedUnconditionalPurchaseObligation":{"label":"Recorded Unconditional Purchase Obligation","description":"Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).","units":{"USD":[{"end":"2011-12-31","val":62314000,"accn":"0001047469-12-003484","fy":2011,"fp":"FY","form":"20-F","filed":"2012-03-29","frame":"CY2011Q4I"}]}},"RepaymentsOfBankDebt":{"label":"Repayments of Bank Debt","description":"The cash outflow to settle a bank borrowing during the 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arrangements.","units":{"USD":[{"start":"2009-04-01","end":"2009-06-30","val":-70000000,"accn":"0001047469-10-007421","fy":2010,"fp":"Q2","form":"6-K","filed":"2010-08-12","frame":"CY2009Q2"},{"start":"2009-07-01","end":"2009-09-30","val":200000000,"accn":"0001047469-10-009664","fy":2010,"fp":"Q3","form":"6-K","filed":"2010-11-12","frame":"CY2009Q3"},{"start":"2010-04-01","end":"2010-06-30","val":600000000,"accn":"0001047469-10-007421","fy":2010,"fp":"Q2","form":"6-K","filed":"2010-08-12","frame":"CY2010Q2"},{"start":"2010-07-01","end":"2010-09-30","val":20000000,"accn":"0001047469-10-009664","fy":2010,"fp":"Q3","form":"6-K","filed":"2010-11-12","frame":"CY2010Q3"},{"start":"2010-01-01","end":"2010-12-31","val":1376000000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28","frame":"CY2010"},{"start":"2011-01-01","end":"2011-12-31","val":205000000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2011"},{"start":"2011-01-01","end":"2011-12-31","val":205000000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28"},{"start":"2012-01-01","end":"2012-03-31","val":90000000,"accn":"0001047469-13-005913","fy":2013,"fp":"Q1","form":"6-K","filed":"2013-05-10","frame":"CY2012Q1"},{"start":"2012-01-01","end":"2012-06-30","val":345000000,"accn":"0001047469-13-008312","fy":2013,"fp":"Q2","form":"6-K","filed":"2013-08-09"},{"start":"2012-04-01","end":"2012-06-30","val":255000000,"accn":"0001047469-13-008312","fy":2013,"fp":"Q2","form":"6-K","filed":"2013-08-09","frame":"CY2012Q2"},{"start":"2012-01-01","end":"2012-09-30","val":575000000,"accn":"0001047469-13-010402","fy":2013,"fp":"Q3","form":"6-K","filed":"2013-11-08"},{"start":"2012-07-01","end":"2012-09-30","val":230000000,"accn":"0001047469-13-010402","fy":2013,"fp":"Q3","form":"6-K","filed":"2013-11-08","frame":"CY2012Q3"},{"start":"2012-01-01","end":"2012-12-31","val":605000000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2012"},{"start":"2012-01-01","end":"2012-12-31","val":605000000,"accn":"0001047469-13-003581","fy":2012,"fp":"FY","form":"20-F","filed":"2013-03-28"},{"start":"2013-01-01","end":"2013-03-31","val":70000000,"accn":"0001047469-14-004840","fy":2014,"fp":"Q1","form":"6-K","filed":"2014-05-12","frame":"CY2013Q1"},{"start":"2013-01-01","end":"2013-03-31","val":70000000,"accn":"0001047469-13-005913","fy":2013,"fp":"Q1","form":"6-K","filed":"2013-05-10"},{"start":"2013-01-01","end":"2013-06-30","val":70000000,"accn":"0001047469-14-006866","fy":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11"},{"start":"2013-01-01","end":"2013-06-30","val":70000000,"accn":"0001047469-13-008312","fy":2013,"fp":"Q2","form":"6-K","filed":"2013-08-09"},{"start":"2013-01-01","end":"2013-09-30","val":120000000,"accn":"0001047469-13-010402","fy":2013,"fp":"Q3","form":"6-K","filed":"2013-11-08"},{"start":"2013-07-01","end":"2013-09-30","val":50000000,"accn":"0001047469-13-010402","fy":2013,"fp":"Q3","form":"6-K","filed":"2013-11-08","frame":"CY2013Q3"},{"start":"2013-01-01","end":"2013-12-31","val":120000000,"accn":"0001047469-14-003006","fy":2013,"fp":"FY","form":"40-F","filed":"2014-03-26","frame":"CY2013"},{"start":"2014-01-01","end":"2014-03-31","val":80000000,"accn":"0001047469-14-004840","fy":2014,"fp":"Q1","form":"6-K","filed":"2014-05-12","frame":"CY2014Q1"},{"start":"2014-01-01","end":"2014-06-30","val":410000000,"accn":"0001047469-14-006866","fy":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11"},{"start":"2014-04-01","end":"2014-06-30","val":330000000,"accn":"0001047469-14-006866","fy":2014,"fp":"Q2","form":"6-K","filed":"2014-08-11","frame":"CY2014Q2"}]}},"RepaymentsOfLongTermCapitalLeaseObligations":{"label":"Repayments 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