XML 61 R51.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Summary of Significant Accounting Policies - Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment |  |  |
Value of shares sold |  | $ 301,404 | $ 8,300
Loss on sale of offshore rigs | $ 7,141 | $ 11,789 | $ 19,026
Rig Assets Excluding Jackup Rigs |  |  |
Property, Plant and Equipment |  |  |
Operating rig asset depreciable life, operating days | 4927 days |  |
Non-operating rig asset depreciable life | 20 years |  |
Jack Up Rigs |  |  |
Property, Plant and Equipment |  |  |
Operating rig asset depreciable life, operating days | 8030 days |  |
Non-operating rig asset depreciable life | 30 years |  |
Building | Minimum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 10 years |  |
Building | Maximum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 30 years |  |
Oilfield Hauling and Mobile Equipment and Other Machinery and Equipment | Minimum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 3 years |  |
Oilfield Hauling and Mobile Equipment and Other Machinery and Equipment | Maximum |  |  |
Property, Plant and Equipment |  |  |
Estimated useful life | 10 years |  |

X
- Definition Represents the losses (gains) on sales, retirements and involuntary conversions of long-lived assets. + References No definition available. + Details
Name: | nbr_LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Useful life of non-operating rig asset used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
Name: | nbr_PropertyPlantAndEquipmentNonOperatingRigAssetUsefulLife
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of operating rig asset used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
Name: | nbr_PropertyPlantAndEquipmentOperatingRigAssetUsefulLife
Namespace Prefix: | nbr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=nbr_RigAssetsExcludingJackupRigsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=nbr_JackUpRigsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=nbr_OilfieldHaulingAndMobileEquipmentAndOtherMachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |