XML 49 R38.htm IDEA: XBRL DOCUMENT
v3.21.2

Debt (Details) | 1 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) | Jan. 31, 2017 USD ($) $ / shares | Jun. 30, 2021 USD ($) | Mar. 31, 2021 | Dec. 31, 2020 USD ($) | Dec. 13, 2019 USD ($) | Oct. 11, 2018 USD ($)
Debt |  |  |  |  |  |  |
Long-term Debt, Gross |  |  | $ 2,842,710,000 |  | $ 2,990,971,000 |  |
Less: deferred financing costs |  |  | 19,585,000 |  | 22,270,000 |  |
Long-term debt |  |  | 2,823,125,000 |  | 2,968,701,000 |  |
Gain (Loss) on debt repurchase |  |  | 8,200,000 |  |  |  |
Revolving credit facility |  |  | 557,500,000 |  | 672,500,000 |  |
2018 revolving credit facility |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Revolving credit facility |  |  | $ 557,500,000 |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 1,013,600,000.0000 | $ 1,267,000,000
Weighted average interest rate (as a percent) |  |  | 3.62% |  |  |  |
Debt instrument, covenant, minimum liquidity, amount | $ 160,000,000.0 |  |  |  |  |  |
Debt covenant threshold amount added to restricted cash and cash equivalents for minimum liquidity | 75,000,000 |  |  |  |  |  |
Debt covenant threshold percentage | $ 75 |  |  |  |  |  |
Collateralized assets, net value |  |  | $ 1,260,000,000 |  |  |  |
2018 revolving credit facility | Maximum |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Debt to EBITDA ratio | 5.5 |  |  |  |  | 5.5 |
2018 revolving credit facility | Guarantor Subsidiaries | Minimum |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Debt instrument, guarantor coverage ratio | 4.25 |  |  |  |  |  |
2018 revolving credit facility | Nabors Delaware |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  |  |  |  |  | 5.50%
Maximum borrowing capacity |  |  |  |  |  | $ 981,600,000 |
2018 revolving credit facility | Nabors Canada |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 32,000,000.0 |
Senior Notes. |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Principal amount redeemed |  |  | 30,500,000 |  |  |  |
Repayment of long-term debt including accrued and unpaid interest |  |  | 22,400,000 |  |  |  |
Payment of accrued and unpaid interest |  |  | 600,000 |  |  |  |
4.625% senior notes due September 2021 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 82,428,000 |  | 86,329,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 4.625% |  |  |  |
5.50% senior notes due January 2023 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 24,446,000 |  | 28,443,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 5.50% |  |  |  |
5.10% senior notes due September 2023 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 120,141,000 |  | 121,077,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 5.10% |  |  |  |
0.75% senior exchangeable notes due January 2024 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 253,733,000 |  | 279,700,000 |  |
Interest rate on senior notes due (as a percent) |  | 0.75% | 0.75% |  |  |  |
5.75% senior notes due February 2025 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 586,308,000 |  | 610,818,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 5.75% |  |  |  |
7.25% senior notes due January 2026 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  | 7.25% |  |  |  |
7.50% senior notes due January 2028 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Interest rate on senior notes due (as a percent) |  |  | 7.50% |  |  |  |
6.50% senior priority guaranteed notes due February 2025 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 50,485,000 |  | 50,485,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 6.50% |  |  |  |
9.00% senior priority guaranteed notes due February 2025 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 218,082,000 |  | 192,032,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 9.00% |  |  |  |
7.25% senior guaranteed notes due January 2026 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 559,978,000 |  | 559,978,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 7.25% |  |  |  |
7.50% senior guaranteed notes due January 2028 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Senior Notes |  |  | $ 389,609,000 |  | $ 389,609,000 |  |
Interest rate on senior notes due (as a percent) |  |  | 7.50% |  |  |  |
Debt Exchange Transactions |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Future contractual interest payments |  |  | $ 9,400,000 |  |  |  |
Aggregate principal amount exchanged |  |  | 40,000,000 |  |  |  |
Aggregate principal amount of debt issued in exchanges |  |  | 26,050,000 |  |  |  |
Debt Exchange Transactions | Nabors Delaware |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Aggregate principal amount exchanged |  |  | 40,000,000.0 |  |  |  |
Debt Exchange Transactions | 0.75% senior exchangeable notes due January 2024 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Long-term Debt |  |  | 287,300,000 |  |  |  |
Aggregate amount of senior notes |  | $ 575,000,000.0 |  |  |  |  |
Interest rate on senior notes due (as a percent) |  | 0.75% |  |  |  |  |
Debt exchangeable notes |  | $ 411,200,000 |  |  |  |  |
Equity component |  | $ 163,800,000 |  |  |  |  |
Exchange rate of common shares |  | 0.8018 |  |  |  |  |
Principal amount of notes |  | $ 1,000 |  |  |  |  |
Exchange price per common share (in dollars per share) | $ / shares |  | $ 1,247.19 |  |  |  |  |
Aggregate principal amount exchanged |  |  | 35,000,000 |  |  |  |
Debt Exchange Transactions | 5.75% senior notes due February 2025 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Aggregate principal amount exchanged |  |  | 5,000,000 |  |  |  |
Debt Exchange Transactions | 9.00% senior priority guaranteed notes due February 2025 |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |
Aggregate amount of senior notes |  |  | $ 26,100,000 |  |  |  |
Interest rate on senior notes due (as a percent) |  |  | 9.00% | 9.00% |  |  |

X
- Definition The carrying amount of debt component of convertible debt which may be settled in cash upon conversion + References No definition available. + Details
Name: | nbr_DebtInstrumentConvertibleCarryingAmountOfDebtComponent
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum amount of liquidity should be maintained under debt covenants. + References No definition available. + Details
Name: | nbr_DebtInstrumentCovenantMinimumLiquidityAmount
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the threshold multiplier on EBITDA to maintain net debt to EBITDA ratio under the debt instrument covenant. + References No definition available. + Details
Name: | nbr_DebtInstrumentCovenantNetDebtToEBITDThresholdMultiplierOfEBITD
Namespace Prefix: | nbr_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt covenant threshold amount added to aggregate amount of unrestricted cash and cash equivalents to meet minimum liquidity. + References No definition available. + Details
Name: | nbr_DebtInstrumentCovenantThresholdAmountAddedToUnrestrictedCashAndCashEquivalentsMinimumLiquidity
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition It represents the increased the Guarantor Coverage ratio. + References No definition available. + Details
Name: | nbr_DebtInstrumentGuarantorCoverageRatio
Namespace Prefix: | nbr_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the denomination of the principal amount of debt that is used in conversion calculations. + References No definition available. + Details
Name: | nbr_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Debt covenant threshold percentage of aggregate amount of unrestricted cash and cash equivalents held in deposit account of a commercial bank outside of the U.S or Canada which is added to the aggregate amount of unrestricted cash and cash equivalents to meet minimum liquidity. + References No definition available. + Details
Name: | nbr_DebtInstrumentThresholdPercentage
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of debt issued in exchange under debt restructuring. + References No definition available. + Details
Name: | nbr_DebtRestructuringDebtIssuedAmount
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of future contractual interest payments + References No definition available. + Details
Name: | nbr_DebtRestructuringFutureContractualInterestPayments
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The exchange price per common share. + References No definition available. + Details
Name: | nbr_ExchangePricePerCommonShare
Namespace Prefix: | nbr_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer, plus accrued and unpaid interest. + References No definition available. + Details
Name: | nbr_RepaymentsOfLongTermDebtIncludingAccruedAndUnpaidInterest
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of existing debt that was exchanged for newly issued debt. + References No definition available. + Details
Name: | nbr_TroubledDebtRestructuringAmountOfDebtExchanged
Namespace Prefix: | nbr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
Name: | us-gaap_DebtInstrumentCollateralAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 + Details
Name: | us-gaap_DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(5)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Face (par) amount of the original debt instrument that was repurchased. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentRepurchasedFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
Name: | us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + 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 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399 + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 + Details
Name: | us-gaap_InterestPaidNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
Name: | us-gaap_LineOfCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: 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(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16(a)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_SeniorNotes
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_RevolvingCreditFacility2018Member
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_ConsolidatedEntitiesAxis=srt_GuarantorSubsidiariesMember
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_ConsolidatedEntitiesAxis=nbr_NaborsDelawareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=nbr_NaborsDrillingCanadaLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=us-gaap_SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes4.625PercentageDueTwoZeroTwoOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes5.50PercentageDueTwoZeroTwoThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes5.10PercentageDueTwoZeroTwoThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes0.75PercentageDueTwoZeroTwoFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes5.75PercentageDueTwoZeroTwoFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes7.25PercentageDueTwoZeroTwoSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorNotes7.50PercentageDueTwoZeroTwoEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorGuaranteedNotes6.50PercentageDueTwoZeroTwoFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorGuaranteedNotes9.00PercentageDueTwoZeroTwoFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorGuaranteedNotes7.25PercentageDueTwoZeroTwoSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=nbr_SeniorGuaranteedNotes7.50PercentageDueTwoZeroTwoEightMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TransactionTypeAxis=nbr_DebtExchangeTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |