US GAAP Taxonomy (2011): Exemplar: (us-gaap-dis-aro-pre-2011-01-31.xml)

-Network: (420000 - Disclosure - Asset Retirement Obligations)
-us-gaap:Asset Retirement Obligation Disclosure [Abstract] {us-gaap:AssetRetirementObligationDisclosureAbstract}
-added:Asset Retirement Obligation [Table] {ID2}
-dei:Legal Entity [Axis] {dei:LegalEntityAxis}
dei:Consolidated Entity [Domain] {dei:EntityDomain}
-added:Asset Retirement Obligation [Roll Up] {added:AssetRetirementObligationLineItems}
us-gaap:Schedule of Change in Asset Retirement Obligation [Table Text Block] {us-gaap:ScheduleOfChangeInAssetRetirementObligationTableTextBlock}
us-gaap:Schedule of Asset Retirement Obligations [Table Text Block] {us-gaap:ScheduleOfAssetRetirementObligationsTableTextBlock}
us-gaap:Asset Retirement Obligation Disclosure [Text Block] {us-gaap:AssetRetirementObligationDisclosureTextBlock}
-added:Asset Retirement Obligation [Roll Up] {added:AssetRetirementObligationHierarchy}
us-gaap:Asset Retirement Obligations, Description {us-gaap:AssetRetirementObligationsDescription}
us-gaap:Asset Retirement Obligation, Legally Restricted Assets, Fair Value {us-gaap:AssetRetirementObligationLegallyRestrictedAssetsFairValue}
us-gaap:Asset Retirement Obligations, Significant Changes {us-gaap:AssetRetirementObligationsSignificantChanges}
us-gaap:Asset Retirement Obligations, Liability Not Recognized {us-gaap:AssetRetirementObligationsLiabilityNotRecognized}
us-gaap:Asset Retirement Obligation, Cash Paid to Settle {us-gaap:AssetRetirementObligationCashPaidToSettle}
-us-gaap:Asset Retirement Obligation [Roll Up] {us-gaap:AssetRetirementObligationAbstract}
us-gaap:Asset Retirement Obligation, Current {us-gaap:AssetRetirementObligationCurrent}
-us-gaap:Asset Retirement Obligations, Noncurrent [Roll Up] {us-gaap:AssetRetirementObligationsNoncurrentAbstract}
us-gaap:Mine Reclamation and Closing Liability, Noncurrent {us-gaap:MineReclamationAndClosingLiabilityNoncurrent}
us-gaap:Oil and Gas Reclamation Liability, Noncurrent {us-gaap:OilAndGasReclamationLiabilityNoncurrent}
us-gaap:Decommissioning Liability, Noncurrent {us-gaap:DecommissioningLiabilityNoncurrent}
us-gaap:Spent Nuclear Fuel Obligation, Noncurrent {us-gaap:SpentNuclearFuelObligationNoncurrent}
us-gaap:Accrued Capping, Closure, Post-closure and Environmental Costs, Noncurrent {us-gaap:AccruedCappingClosurePostClosureAndEnvironmentalCostsNoncurrent}
us-gaap:Asset Retirement Obligations, Noncurrent, Total {us-gaap:AssetRetirementObligationsNoncurrent}
us-gaap:Asset Retirement Obligation, Total {us-gaap:AssetRetirementObligation}
-us-gaap:Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] {us-gaap:AssetRetirementObligationRollForwardAnalysisRollForward}
us-gaap:Asset Retirement Obligation, Beginning Balance {us-gaap:AssetRetirementObligation}
-added:Asset Retirement Obligation, Period Increase (Decrease) [Roll Up] {added:AssetRetirementObligationPeriodIncreaseDecreaseRollUp}
us-gaap:Asset Retirement Obligation, Liabilities Incurred {us-gaap:AssetRetirementObligationLiabilitiesIncurred}
us-gaap:Asset Retirement Obligation, Liabilities Settled {us-gaap:AssetRetirementObligationLiabilitiesSettled}
us-gaap:Asset Retirement Obligation, Accretion Expense {us-gaap:AssetRetirementObligationAccretionExpense}
us-gaap:Asset Retirement Obligation, Revision of Estimate {us-gaap:AssetRetirementObligationRevisionOfEstimate}
us-gaap:Asset Retirement Obligation, Foreign Currency Translation {us-gaap:AssetRetirementObligationForeignCurrencyTranslation}
us-gaap:Asset Retirement Obligation, Period Increase (Decrease), Total {us-gaap:AssetRetirementObligationPeriodIncreaseDecrease}
us-gaap:Asset Retirement Obligation, Ending Balance {us-gaap:AssetRetirementObligation}