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Impairments and Other Charges (Details) (USD $)
12 Months Ended 3 Months Ended
Dec. 31, 2014
item
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2012
Sep. 30, 2013
Sep. 12, 2013
Summary of Impairments and other charges            
Provision for retirement of assets $ 393,962,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf $ 14,044,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf $ 138,666,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf      
Impairment of long-lived assets 217,627,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 20,000,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse 50,355,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse      
Subtotal 611,589,000nbr_RetirementAndImpairmentChargesForTangibleAssets          
Goodwill impairments 356,605,000us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss 26,279,000us-gaap_GoodwillImpairmentLoss      
Inangible Asset Impairments 29,942,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill   74,960,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill      
Subtotal 386,547,000us-gaap_GoodwillAndIntangibleAssetImpairment   101,239,000us-gaap_GoodwillAndIntangibleAssetImpairment      
Transaction Costs 22,313,000us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts          
Other-than-temporary impairment on equity security 6,974,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment          
Loss on tendered notes   208,197,000nbr_PremiumPaidOnExtinguishmentOfDebt        
Termination of employment contract   45,000,000nbr_ProvisionForTerminationPayment        
Impairments and other charges 1,027,423,000nbr_AssetImpairmentAndOtherCharges 287,241,000nbr_AssetImpairmentAndOtherCharges 290,260,000nbr_AssetImpairmentAndOtherCharges      
Goodwill 173,928,000us-gaap_Goodwill 512,964,000us-gaap_Goodwill 472,326,000us-gaap_Goodwill 472,326,000us-gaap_Goodwill    
Loss on tendered notes            
Number of retired mechanical rigs 25nbr_NumberOfRetiredMechanicalRigs          
Percentage of charges from drilling rigs and rig equipment 0.67%nbr_PercentageOfChargesFromDrillingRigsAndRigEquipmentDuringPeriod          
Senior Notes Due January 2019            
Loss on tendered notes            
Interest rate on senior notes due (as a percent) 9.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= nbr_SeniorNotesDueTwoZeroOneNineMember
9.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= nbr_SeniorNotesDueTwoZeroOneNineMember
    9.25%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= nbr_SeniorNotesDueTwoZeroOneNineMember
 
Principal amount repurchased   785,400,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= nbr_SeniorNotesDueTwoZeroOneNineMember
      785,400,000us-gaap_DebtInstrumentRepurchasedFaceAmount
/ us-gaap_DebtInstrumentAxis
= nbr_SeniorNotesDueTwoZeroOneNineMember
Aggregate payments of debt repurchased   1,000,000,000us-gaap_PaymentsOfDebtExtinguishmentCosts
/ us-gaap_DebtInstrumentAxis
= nbr_SeniorNotesDueTwoZeroOneNineMember
       
Petrello            
Summary of Impairments and other charges            
Cash awarded in connection with termination of prior contract   18,000,000nbr_CashPaidOnTerminationPriorEmploymentContract
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
       
Common Stock | Petrello            
Summary of Impairments and other charges            
Cash awarded in connection with termination of prior contract   27,000,000nbr_CashPaidOnTerminationPriorEmploymentContract
/ us-gaap_AwardTypeAxis
= us-gaap_CommonStockMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
       
U.S.            
Summary of Impairments and other charges            
Provision for retirement of assets 271,141,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
  37,100,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
     
Impairment of long-lived assets 137,000,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
    17,400,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
   
Subtotal 408,141,000nbr_RetirementAndImpairmentChargesForTangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
         
Goodwill 50,149,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
50,149,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
50,149,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
50,149,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
   
CANADA            
Summary of Impairments and other charges            
Provision for retirement of assets 24,211,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= country_CA
  33,700,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= country_CA
     
Impairment of long-lived assets 10,176,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
/ us-gaap_StatementBusinessSegmentsAxis
= country_CA
    32,900,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
/ us-gaap_StatementBusinessSegmentsAxis
= country_CA
   
Subtotal 34,387,000nbr_RetirementAndImpairmentChargesForTangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= country_CA
         
International            
Summary of Impairments and other charges            
Provision for retirement of assets 56,472,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_InternationalMember
  16,500,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_InternationalMember
     
Impairment of long-lived assets 70,451,000us-gaap_ImpairmentOfLongLivedAssetsHeldForUse
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_InternationalMember
         
Subtotal 126,923,000nbr_RetirementAndImpairmentChargesForTangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_InternationalMember
         
Rig Services            
Summary of Impairments and other charges            
Provision for retirement of assets 42,138,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
  2,000,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
     
Subtotal 42,138,000nbr_RetirementAndImpairmentChargesForTangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
         
Goodwill 31,667,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
37,261,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
32,113,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
32,113,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_RigServicesMember
   
Subtotal drilling and rig services            
Summary of Impairments and other charges            
Goodwill 81,816,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_DrillingAndRigServicesMember
87,410,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_DrillingAndRigServicesMember
82,262,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_DrillingAndRigServicesMember
82,262,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_DrillingAndRigServicesMember
   
Completion Services            
Summary of Impairments and other charges            
Goodwill   334,992,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionServicesMember
334,992,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionServicesMember
334,992,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionServicesMember
   
Production Services            
Summary of Impairments and other charges            
Goodwill 92,112,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_ProductionServicesMember
90,562,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_ProductionServicesMember
55,072,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_ProductionServicesMember
55,072,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_ProductionServicesMember
   
Subtotal completion and production services            
Summary of Impairments and other charges            
Provision for retirement of assets 20,000,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
  49,400,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
     
Subtotal 29,900,000nbr_RetirementAndImpairmentChargesForTangibleAssets
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
         
Goodwill 92,112,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
425,554,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
390,064,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
390,064,000us-gaap_Goodwill
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionAndProductionServicesMember
   
Gulf of Mexico            
Summary of Impairments and other charges            
Provision for retirement of assets 54,400,000us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_GulfOfMexicoMember
         
Business Acquisitions Acquiree Superior | Completion Services            
Summary of Impairments and other charges            
Goodwill $ 335,000,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= nbr_BusinessAcquisitionsAcquireeSuperiorMember
/ us-gaap_StatementBusinessSegmentsAxis
= nbr_CompletionServicesMember