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Supplemental Balance Sheet, Income Statement and Cash Flow Information (Details 3) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Losses (gains) on sales and disposals of long-lived assets and other expense (income) |  |  |
Losses (gains) on sales, disposals and involuntary conversions of long-lived assets | $ (8,830,000)nbr_LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets | $ 13,624,000 nbr_LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets | $ (147,522,000)nbr_LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets
Litigation expenses | 8,880,000 us-gaap_GainLossRelatedToLitigationSettlement | 11,684,000 us-gaap_GainLossRelatedToLitigationSettlement | 5,382,000 us-gaap_GainLossRelatedToLitigationSettlement
Foreign currency transaction losses (gains) | 1,019,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 6,219,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax | 4,787,000 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Losses (gains) on derivative instruments | 5,576,000 us-gaap_GainLossOnDerivativeInstrumentsNetPretax | 3,785,000 us-gaap_GainLossOnDerivativeInstrumentsNetPretax |
Other losses (gains) | 2,428,000 us-gaap_GainLossOnSaleOfOtherAssets | 2,665,000 us-gaap_GainLossOnSaleOfOtherAssets | 717,000 us-gaap_GainLossOnSaleOfOtherAssets
Losses (gains) on sales and retirements of long-lived assets and other expense (income), net | 9,073,000 nbr_LossesGainsOnSalesRetirementsAndImpairmentsOfLongLivedAssetsAndOtherExpenseIncomeNet | 37,977,000 nbr_LossesGainsOnSalesRetirementsAndImpairmentsOfLongLivedAssetsAndOtherExpenseIncomeNet | (136,636,000)nbr_LossesGainsOnSalesRetirementsAndImpairmentsOfLongLivedAssetsAndOtherExpenseIncomeNet
Gain on sale of equity interest |  |  | 160,000,000 us-gaap_GainLossOnSaleOfEquityInvestments
Parent Company |  |  |
Losses (gains) on sales and disposals of long-lived assets and other expense (income) |  |  |
Losses (gains) on sales and retirements of long-lived assets and other expense (income), net | $ 7,668,000 nbr_LossesGainsOnSalesRetirementsAndImpairmentsOfLongLivedAssetsAndOtherExpenseIncomeNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 7,353,000 nbr_LossesGainsOnSalesRetirementsAndImpairmentsOfLongLivedAssetsAndOtherExpenseIncomeNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 1,231,000 nbr_LossesGainsOnSalesRetirementsAndImpairmentsOfLongLivedAssetsAndOtherExpenseIncomeNet / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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- Definition Represents the gains (losses) on sales and retirements of long-lived assets other income expense net. + References No definition available. + Details
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- Definition Represents the losses (gains) on sales, retirements and involuntary conversions of long-lived assets. + References No definition available. + Details
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- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894 + Details
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 + Details
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- Definition The difference between the carrying value and the sale price of equity securities, not separately or otherwise categorized as trading or available-for-sale. This element includes investments in which the entity holds a small ownership stake (generally, less than 20% of the shares outstanding) and cannot exert significant influence. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount of gain (loss) on sale or disposal of other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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