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Accounts Receivable Sales Agreement (Details) - A/R Agreement - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Sep. 13, 2019
Accounts Receivable Sales Agreement |  |
Agreement amount | $ 67.0 | $ 250.0
Accounts receivables sold to purchasers | 54.0 |
Gain (loss) on sale of receivables | 0.0 |
Trade receivables pledged as collateral | $ 63.1 |

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- Definition The agreement amount under the accounts receivables purchase facility. + References No definition available. + Details
Name: | nbr_AccountsReceivablesPurchaseFacilityAgreementAmount
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of accounts receivables sold during the period. + References No definition available. + Details
Name: | nbr_AccountsReceivablesSold
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of trade receivables pledged as collateral. + References No definition available. + Details
Name: | nbr_TradeReceivablesPledgedAsCollateral
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- 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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of gain (loss) on sale of accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107425-111719 + Details
Name: | us-gaap_GainLossOnSaleOfAccountsReceivable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=nbr_AccountsReceivablesPurchaseFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |