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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 0 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 10, 2015
item
Mar. 31, 2015
Subsidiaries      
Loss from discontinued operations $ 1us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax    
Discontinued Operations, Disposed Venezuelan Subsidiaries      
Subsidiaries      
Loss from discontinued operations 1us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
   
Expropriated plants   2oi_ExpropriatedPlantsNumber
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
 
Discontinued Operations, Disposed Venezuelan Subsidiaries | Minimum      
Subsidiaries      
Litigation Settlement, Amount   455us-gaap_LitigationSettlementAmount
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Discontinued Operations, Disposed Venezuelan Subsidiaries | Maximum      
Subsidiaries      
Loss from discontinued operations     $ 1us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= us-gaap_SegmentDiscontinuedOperationsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember