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v2.4.1.9

Commitments and Contingencies (Details 3) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Self-Insurance disclosures |  |
Employer's liability claims subject to per-occurrence deductible | $ 3.0 nbr_EmployersLiabilityClaimsSubjectToPerOccurrenceDeductible |
Workers automobile claims | 2.5 nbr_AutomobileClaimsDeductible |
General liability claims subject to per-occurrence deductible | 5.0 nbr_GeneralLiabilityClaimsSubjectToPerOccurrenceDeductible |
Deductions in land rigs and for offshore rigs | 5.0 nbr_DeductionsInLandRigsAndForOffshoreRigs |
Self-insurance accruals | 198.1 us-gaap_SelfInsuranceReserve | 181.7 us-gaap_SelfInsuranceReserve
Self-insurance recoveries/receivables | 39.9 nbr_SelfInsuranceRecoveriesOrReceivables | 44.7 nbr_SelfInsuranceRecoveriesOrReceivables
South America Africa the Middle East and Asia Excluding Colombia [Member] |  |
Self-Insurance disclosures |  |
Political risk insurance losses deductible | 0.25 nbr_PoliticalRiskInsuranceLossesDeductible / us-gaap_StatementGeographicalAxis = nbr_SouthAmericaAfricaTheMiddleEastAndAsiaExcludingColombiaMember |
COLOMBIA |  |
Self-Insurance disclosures |  |
Political risk insurance deductible for foreign operation | 0.5 nbr_PoliticalRiskInsuranceLossesDeductibleForForeignOperation / us-gaap_StatementGeographicalAxis = country_CO |
Mexico | Minimum |  |
Income tax |  |
Aggregate remaining amounts assessed or expected to assessed range | 30 us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_RangeAxis = us-gaap_MinimumMember |
Mexico | Maximum |  |
Income tax |  |
Aggregate remaining amounts assessed or expected to assessed range | $ 35 us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_RangeAxis = us-gaap_MaximumMember |

X
- Definition Represents the amount of per-occurrence deductible which the entity has on its automobile insurance claims. + References No definition available. + Details
Name: | nbr_AutomobileClaimsDeductible
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of deductions in land rigs and for offshore rigs. + References No definition available. + Details
Name: | nbr_DeductionsInLandRigsAndForOffshoreRigs
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of employer's liability claims subject to per-occurrence deductible. + References No definition available. + Details
Name: | nbr_EmployersLiabilityClaimsSubjectToPerOccurrenceDeductible
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of general liability claims subject to per-occurrence deductible. + References No definition available. + Details
Name: | nbr_GeneralLiabilityClaimsSubjectToPerOccurrenceDeductible
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of political risk insurance losses deductible. + References No definition available. + Details
Name: | nbr_PoliticalRiskInsuranceLossesDeductible
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of political risk insurance losses deductible for foreign operation. + References No definition available. + Details
Name: | nbr_PoliticalRiskInsuranceLossesDeductibleForForeignOperation
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of self-insurance recoveries/ receivables as of balance sheet date. + References No definition available. + Details
Name: | nbr_SelfInsuranceRecoveriesOrReceivables
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | nbr_SelfInsuranceReserveDisclosureAbstract
Namespace Prefix: | nbr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated amount of loss resulting from an adverse tax position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
Name: | us-gaap_IncomeTaxExaminationEstimateOfPossibleLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_IncomeTaxExaminationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_SelfInsuranceReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=country_CO
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementGeographicalAxis=nbr_SouthAmericaAfricaTheMiddleEastAndAsiaExcludingColombiaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |