2.2.0.7 false Acquisition of FDR Holdings Limited (Details) (USD $) 0602 - Disclosure - Acquisition of FDR Holdings Limited (Details) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 3 Acquisition of FDR Holdings Limited (Textuals) [Abstract] 1 ne_AcquisitionOfCompanyOneTextualsAbstract ne false na duration Acquisition of Company One. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false xbrli:stringItemType string Acquisition of Company One. false 4 Acquisition of FDR Holdings Limited 2 us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 2600000000 2600000000 false false false xbrli:monetaryItemType monetary The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d false 5 Cash paid 2 us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1700000000 1700000000 false false false xbrli:monetaryItemType monetary Amount of cash paid to acquire the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f(1) Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d false 6 Secured non-recourse debt assumption 2 us-gaap_BusinessAcquisitionPurchasePriceAllocationLiabilitiesAssumed us-gaap true credit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 622000000 622000000 false false false xbrli:monetaryItemType monetary The amount of acquisition cost of a business combination allocated to liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph g Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 false 1 4 false NoRounding UnKnown UnKnown false true