XML 52 R33.htm IDEA: XBRL DOCUMENT
v3.20.2

General (Details) |  |  | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 22, 2020 | Apr. 20, 2020 $ / shares shares | Jun. 30, 2020 item country $ / shares shares | Apr. 24, 2020 USD ($) shares | Apr. 19, 2020 $ / shares shares | Dec. 31, 2019 $ / shares
Nature of Operations |  |  |  |  |  |
Number of countries company has actively marketed rigs for land based drilling operations | country |  |  | 20 |  |  |
Actively marketed rigs for offshore based drilling operations |  |  | 33 |  |  |
Reverse stock split ratio | 50 | 50 |  |  |  |
Common shares, shares authorized | shares |  | 16,000,000 | 32,000,000 | 32,000,000 | 800,000,000 |
Fractional common shares issued | shares |  |  |  | 0 |  |
Common shares, par value | $ / shares |  | $ 0.05 | $ 0.05 |  | $ 0.001 | $ 0.05
Common stock shares authorized increase percentage |  | 100.00% |  |  |  |
Common stock shares authorized amount | $ |  |  |  | $ 1,600,000 |  |
Minimum |  |  |  |  |  |
Nature of Operations |  |  |  |  |  |
Reverse stock split ratio |  | 15 |  |  |  |
Maximum |  |  |  |  |  |
Nature of Operations |  |  |  |  |  |
Reverse stock split ratio |  | 50 |  |  |  |
United States and Canada |  |  |  |  |  |
Nature of Operations |  |  |  |  |  |
Actively marketed rigs for land based drilling operations |  |  | 365 |  |  |
Countries Other Than United States and Canada |  |  |  |  |  |
Nature of Operations |  |  |  |  |  |
Actively marketed rigs for land based drilling operations |  |  | 16 |  |  |

X
- Definition Amount of common stock shares authorized. + References No definition available. + Details
Name: | nbr_CommonStockSharesAuthorizedAmount
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of increase in common stock shares authorized. + References No definition available. + Details
Name: | nbr_CommonStockSharesAuthorizedIncreasePercentage
Namespace Prefix: | nbr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of fractional common shares issued. + References No definition available. + Details
Name: | nbr_FractionalCommonSharesIssues
Namespace Prefix: | nbr_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of actively marketed rigs for land based drilling operations. + References No definition available. + Details
Name: | nbr_MarketedRigsForLandBasedDrillingOperations
Namespace Prefix: | nbr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of actively marketed rigs for offshore drilling operations. + References No definition available. + Details
Name: | nbr_MarketedRigsForOffshoreDrillingOperations
Namespace Prefix: | nbr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition n/a + References No definition available. + Details
Name: | nbr_NatureOfOperationsLineItems
Namespace Prefix: | nbr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of countries in which the entity operates as of balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
Name: | us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

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: | srt_StatementGeographicalAxis=nbr_UnitedStatesAndCanadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=nbr_CountriesOtherThanUnitedStatesAndCanadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |