$NBR
NABORS INDUSTRIES LTD Stock $nbr

$nbr Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000155837021001631 Filed on February 24, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$443.4M	$714.3M	$758.1M
YoY Change	-37.92%	-8.67%	-2.74%
Cost Of Revenue	$274.3M	$436.2M	$475.5M
YoY Change	-37.12%	-14.54%	-4.37%
Gross Profit	$169.1M	$278.0M	$282.6M
YoY Change	-39.17%	2.32%	0.14%
Gross Profit Margin	38.14%	38.92%	37.28%
Selling, General & Admin	$53.70M	$62.60M	$63.60M
YoY Change	-14.22%	10.6%	-4.79%
% of Gross Profit	31.76%	22.52%	22.5%
Research & Development	$7.300M	$12.90M	$12.00M
YoY Change	-43.41%	-3.73%	-16.97%
% of Gross Profit	4.32%	4.64%	4.25%
Depreciation & Amortization	$208.7M	$225.8M	$221.6M
YoY Change	-7.57%	-0.4%	6.03%
% of Gross Profit	123.42%	81.22%	78.41%
Operating Expenses	$271.8M	$332.5M	$12.00M
YoY Change	-18.26%	5.49%	-16.97%
Operating Profit	-$102.7M	-$54.50M	$24.70M
YoY Change	88.44%	25.29%	-22.16%
Interest Expense	-$45.30M	-$49.90M	$51.29M
YoY Change	-9.22%	-10.09%	-0.24%
% of Operating Profit			207.69%
Other Income/Expense, Net			-$5.005M
YoY Change			-45.22%
Pretax Income	-$65.10M	-$258.1M	-$75.89M
YoY Change	-74.78%	79.74%	-8.82%
Income Tax	$38.80M	$26.50M	$23.90M
% Of Pretax Income
Net Earnings	-$108.2M	-$262.7M	-$118.9M
YoY Change	-58.8%	43.22%	3.8%
Net Earnings / Revenue	-24.41%	-36.78%	-15.69%
Basic Earnings Per Share	-$16.45	-$38.66	-$18.25
Diluted Earnings Per Share	-$16.45	-$38.66	-$18.25
COMMON SHARES
Basic Shares Outstanding	7.294M	363.4M	7.041M
Diluted Shares Outstanding			7.041M

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$482.0M	$452.0M	$419.0M
YoY Change	6.64%	-6.22%	7.71%
Cash & Equivalents	$472.2M	$436.0M	$396.9M
Short-Term Investments	$10.00M	$17.00M	$22.00M
Other Short-Term Assets	$109.6M	$164.3M	$153.7M
YoY Change	-33.28%	-7.52%	-26.45%
Inventory	$160.6M	$176.3M	$186.1M
Prepaid Expenses
Receivables	$363.0M	$453.0M	$613.5M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.131B	$1.249B	$1.380B
YoY Change	-9.39%	-21.64%	-10.31%
LONG-TERM ASSETS
Property, Plant & Equipment	$3.986B	$4.931B	$5.152B
YoY Change	-19.16%	-9.83%	-8.14%
Goodwill		$28.38M	$90.54M
YoY Change		-84.57%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$139.1M	$247.2M	$297.2M
YoY Change	-43.74%	-6.18%	-53.56%
Total Long-Term Assets	$4.372B	$5.512B	$5.893B
YoY Change	-20.68%	-11.95%	-8.23%
TOTAL ASSETS
Total Short-Term Assets	$1.131B	$1.249B	$1.380B
Total Long-Term Assets	$4.372B	$5.512B	$5.893B
Total Assets	$5.503B	$6.761B	$7.273B
YoY Change	-18.6%	-13.92%	-8.64%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$220.9M	$295.2M	$364.7M
YoY Change	-25.15%	-24.87%	9.84%
Accrued Expenses	$276.1M	$333.3M	$279.2M
YoY Change	-17.16%	-20.25%	58.63%
Deferred Revenue	$42.80M	$66.80M	$72.00M
YoY Change	-35.93%	-42.76%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$0.00	$1.000M
YoY Change		-100.0%
Total Short-Term Liabilities	$515.5M	$656.5M	$682.3M
YoY Change	-21.49%	-21.1%	-9.27%
LONG-TERM LIABILITIES
Long-Term Debt	$2.969B	$3.333B	$3.517B
YoY Change	-10.94%	-7.05%	-5.9%
Other Long-Term Liabilities	$318.0M	$292.2M	$284.4M
YoY Change	8.85%	6.45%	4.17%
Total Long-Term Liabilities	$3.287B	$3.625B	$3.801B
YoY Change	-9.34%	-6.09%	-5.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$515.5M	$656.5M	$682.3M
Total Long-Term Liabilities	$3.287B	$3.625B	$3.801B
Total Liabilities	$3.804B	$4.285B	$4.512B
YoY Change	-11.23%	-8.8%	-10.27%
SHAREHOLDERS EQUITY
Retained Earnings	-$946.1M	-$104.8M	$171.1M
YoY Change	802.98%	-116.1%
Common Stock	$3.424B	$3.413B	$3.411B
YoY Change	0.32%	0.59%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.316B	$1.314B	$1.314B
YoY Change	0.13%	0.0%
Treasury Stock Shares	$1.090M	$1.056M	$52.80M
Shareholders Equity	$1.151B	$1.983B	$2.252B
YoY Change
Total Liabilities & Shareholders Equity	$5.503B	$6.761B	$7.273B
YoY Change	-18.6%	-13.92%	-8.64%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	-$108.2M	-$262.7M	-$118.9M
YoY Change	-58.8%	43.22%	3.8%
Depreciation, Depletion And Amortization	$208.7M	$225.8M	$221.6M
YoY Change	-7.57%	-0.4%	6.03%
Cash From Operating Activities	$101.9M	$253.8M	$157.7M
YoY Change	-59.85%	1.97%	-31640.0%
INVESTING ACTIVITIES
Capital Expenditures	-$42.40M	-$61.10M	-$92.10M
YoY Change	-30.61%	-49.04%	-28.88%
Acquisitions
YoY Change
Other Investing Activities	$6.300M	$39.00M	$16.60M
YoY Change	-83.85%	1244.83%	69.39%
Cash From Investing Activities	-$36.20M	-$22.20M	-$75.50M
YoY Change	63.06%	-81.04%	-36.93%
FINANCING ACTIVITIES
Cash Dividend Paid		$3.500M	$3.500M
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-99.50M	-189.8M	-53.20M
YoY Change	-47.58%	496.86%	-57.27%
NET CHANGE
Cash From Operating Activities	101.9M	253.8M	157.7M
Cash From Investing Activities	-36.20M	-22.20M	-75.50M
Cash From Financing Activities	-99.50M	-189.8M	-53.20M
Net Change In Cash	-33.80M	41.80M	29.00M
YoY Change	-180.86%	-58.2%	-111.85%
FREE CASH FLOW
Cash From Operating Activities	$101.9M	$253.8M	$157.7M
Capital Expenditures	-$42.40M	-$61.10M	-$92.10M
Free Cash Flow	$144.3M	$314.9M	$249.8M
YoY Change	-54.18%	-14.61%	93.64%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssetsNoncurrent
CY2020Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OperatingLeaseLiabilityCurrent
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001163739
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.02
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:OtherAssetsNoncurrent
CY2019Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OperatingLeaseLiabilityCurrent
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-32657
CY2020	dei	Entity Registrant Name EntityRegistrantName	NABORS INDUSTRIES LTD
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	D0
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	Crown House
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Second Floor
CY2020	dei	Entity Address Address Line3 EntityAddressAddressLine3	4 Par-la-Ville Road
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Hamilton
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	HM08
CY2020	dei	Entity Address Country EntityAddressCountry	BM
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0363970
CY2020	dei	City Area Code CityAreaCode	441
CY2020	dei	Local Phone Number LocalPhoneNumber	292-1510
CY2020	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	254704856
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	7359588
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	472246000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	435990000
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	9500000
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	16506000
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	362977000
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	453042000
CY2020Q4	us-gaap	Inventory Net InventoryNet	160585000
CY2019Q4	us-gaap	Inventory Net InventoryNet	176341000
CY2020Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	16562000
CY2019Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	2530000
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	109595000
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	164257000
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1131465000
CY2019Q4	us-gaap	Assets Current AssetsCurrent	1248666000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3985707000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4930549000
CY2019Q4	us-gaap	Goodwill Goodwill	28380000
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	247171000
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	305844000
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	139085000
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	247219000
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.05
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.05
CY2020Q4	us-gaap	Assets Assets	5503428000
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CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	295159000
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	276085000
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	333282000
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	10157000
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CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
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CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	5000
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	6000
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CY2019Q4	us-gaap	Minority Interest MinorityInterest	67354000
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CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2134043000
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CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1000
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CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	7000
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-12000
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-14663000
CY2020	us-gaap	Profit Loss ProfitLoss	-762846000
CY2019	us-gaap	Profit Loss ProfitLoss	-680510000
CY2018	us-gaap	Profit Loss ProfitLoss	-612726000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	42795000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	22375000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	28222000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-805641000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-702885000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-640948000
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	14611000
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	17244000
CY2018	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	12305000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-820252000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-720129000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-653253000
CY2020	nbr	Income Loss From Continuing Operation Available To Common Stockholders IncomeLossFromContinuingOperationAvailableToCommonStockholders	-820259000
CY2019	nbr	Income Loss From Continuing Operation Available To Common Stockholders IncomeLossFromContinuingOperationAvailableToCommonStockholders	-720117000
CY2018	nbr	Income Loss From Continuing Operation Available To Common Stockholders IncomeLossFromContinuingOperationAvailableToCommonStockholders	-638590000
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	7000
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-12000
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-14663000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-820252000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-720129000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-653253000
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-118.69
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-105.39
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-97.42
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-2.19
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-118.69
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-105.39
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-99.61
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-118.69
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-105.39
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-97.42
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-2.19
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-118.69
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-105.39
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-99.61
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7059000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7032000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6688000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7059000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7032000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6688000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-805641000
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-702885000
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-640948000
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	435000
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	16943000
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	-31962000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-210000
CY2019	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-217000
CY2018	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-216000
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	160000
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	567000
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	567000
CY2018	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodTax	9144000
CY2020	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	805000
CY2019	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	17727000
CY2018	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-40323000
CY2020	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	141000
CY2019	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	190000
CY2018	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	187000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	664000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	17537000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-40510000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-804977000
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-685348000
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-681458000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	42795000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	22375000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	28222000
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	55000
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-251000
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	42795000
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	22430000
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	27971000
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-762182000
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-40346000
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-95741000
CY2020	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-4286000
CY2019	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	1257000
CY2018	us-gaap	Gain Loss On Sale Of Investments GainLossOnSaleOfInvestments	-14195000
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	18194000
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	20626000
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1285000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	24638000
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	24660000
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-662918000
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-653487000
CY2020	us-gaap	Profit Loss ProfitLoss	-762846000
CY2019	us-gaap	Profit Loss ProfitLoss	-680510000
CY2018	us-gaap	Profit Loss ProfitLoss	-612726000
CY2020	nbr	Depreciation And Amortization Including Discontinued Operations DepreciationAndAmortizationIncludingDiscontinuedOperations	853697000
CY2019	nbr	Depreciation And Amortization Including Discontinued Operations DepreciationAndAmortizationIncludingDiscontinuedOperations	876103000
CY2018	nbr	Depreciation And Amortization Including Discontinued Operations DepreciationAndAmortizationIncludingDiscontinuedOperations	868509000
CY2020	nbr	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	64717000
CY2019	nbr	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	35894000
CY2018	nbr	Deferred Income Tax Expense Benefit Including Discontinued Operations DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperations	71579000
CY2020	nbr	Impairments And Other Charges ImpairmentsAndOtherCharges	318582000
CY2019	nbr	Impairments And Other Charges ImpairmentsAndOtherCharges	213404000
CY2018	nbr	Impairments And Other Charges ImpairmentsAndOtherCharges	62578000
CY2020	nbr	Amortization Of Debt Discount And Deferred Financing Costs AmortizationOfDebtDiscountAndDeferredFinancingCosts	31238000
CY2019	nbr	Amortization Of Debt Discount And Deferred Financing Costs AmortizationOfDebtDiscountAndDeferredFinancingCosts	30931000
CY2018	nbr	Amortization Of Debt Discount And Deferred Financing Costs AmortizationOfDebtDiscountAndDeferredFinancingCosts	32213000
CY2020	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	228274000
CY2019	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	11468000
CY2018	us-gaap	Gain Loss On Repurchase Of Debt Instrument GainLossOnRepurchaseOfDebtInstrument	-5268000
CY2020	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-64365000
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	26396000
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-13133000
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-20876000
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-4235000
CY2020	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-42795000
CY2019	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-22375000
CY2018	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-28222000
CY2019	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-5000
CY2018	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	-164000
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	770000
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-667000
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-720000
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-67502000
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-276685000
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	66486000
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-6188000
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	18695000
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	13981000
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-38672000
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-5157000
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-31770000
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-20830000
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-13106000
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-11717000
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-142826000
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-142857000
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-76561000
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-933000
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-4857000
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-41939000
CY2020	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	2163000
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	8117000
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-60682000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	349761000
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	684558000
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	325773000
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	91000
CY2019	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	4323000
CY2018	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	676000
CY2020	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	2760000
CY2019	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	18849000
CY2018	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	4287000
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2929000
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	20859000
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	195523000
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	427741000
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	458938000
CY2020	nbr	Proceeds From Sale Of Productive Assets And Proceeds From Insurance Settlement ProceedsFromSaleOfProductiveAssetsAndProceedsFromInsuranceSettlement	27397000
CY2019	nbr	Proceeds From Sale Of Productive Assets And Proceeds From Insurance Settlement ProceedsFromSaleOfProductiveAssetsAndProceedsFromInsuranceSettlement	60288000
CY2018	nbr	Proceeds From Sale Of Productive Assets And Proceeds From Insurance Settlement ProceedsFromSaleOfProductiveAssetsAndProceedsFromInsuranceSettlement	109098000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-165457000
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-355856000
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-367088000
CY2020	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	1000000000
CY2018	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	800000000
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1394043000
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	455360000
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	878278000
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	28112000
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1767000
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	21277000
CY2020	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	1552500000
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	1050000000
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	1135000000
CY2020	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-1235000000
CY2019	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-865000000
CY2018	us-gaap	Proceeds From Repayments Of Lines Of Credit ProceedsFromRepaymentsOfLinesOfCredit	-1475000000
CY2018	us-gaap	Proceeds From Repayments Of Commercial Paper ProceedsFromRepaymentsOfCommercialPaper	-40000000
CY2019	nbr	Proceeds From Payments For Short Term Borrowings Other Than Credit Facility ProceedsFromPaymentsForShortTermBorrowingsOtherThanCreditFacility	-561000
CY2018	nbr	Proceeds From Payments For Short Term Borrowings Other Than Credit Facility ProceedsFromPaymentsForShortTermBorrowingsOtherThanCreditFacility	380000
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	301404000
CY2018	us-gaap	Proceeds From Issuance Of Convertible Preferred Stock ProceedsFromIssuanceOfConvertiblePreferredStock	277927000
CY2020	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	1731000
CY2020	nbr	Payments Of Dividends Common Stock And Preferred Stock PaymentsOfDividendsCommonStockAndPreferredStock	22538000
CY2019	nbr	Payments Of Dividends Common Stock And Preferred Stock PaymentsOfDividendsCommonStockAndPreferredStock	49583000
CY2018	nbr	Payments Of Dividends Common Stock And Preferred Stock PaymentsOfDividendsCommonStockAndPreferredStock	87098000
CY2018	nbr	Proceeds From Redeemable Noncontrolling Interest Contribution ProceedsFromRedeemableNoncontrollingInterestContribution	156935000
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	5083000
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	4552000
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	5452000
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-13994000
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-4750000
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-8912000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-148001000
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-331573000
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	155629000
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-3061000
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-6171000
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-5263000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	33242000
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-9042000
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	109051000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	442038000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	451080000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	342029000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	475280000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	442038000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	451080000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	435990000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	447766000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	336997000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	6048000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	3314000
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	5032000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	442038000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	451080000
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	342029000
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	472246000
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	435990000
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	447766000
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	3034000
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	6048000
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	3314000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	475280000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	442038000
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	451080000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2938773000
CY2018	us-gaap	Profit Loss ProfitLoss	-612726000
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	12.00
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	82973000
CY2018	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	2.14
CY2018	us-gaap	Dividends Preferred Stock DividendsPreferredStock	12305000
CY2018	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	301403000
CY2018	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	277927000
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-40761000
CY2018	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	26396000
CY2018	nbr	Noncontrolling Interest Contribution NoncontrollingInterestContribution	-5452000
CY2018	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	11098000
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	3870000
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2750326000
CY2019	us-gaap	Profit Loss ProfitLoss	-680510000
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.00
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	14953000
CY2019	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	3.00
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	17245000
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	17592000
CY2019	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	24659000
CY2019	nbr	Noncontrolling Interest Contribution NoncontrollingInterestContribution	-4552000
CY2019	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	20534000
CY2019	us-gaap	Stockholders Equity Other StockholdersEquityOther	4618000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2050165000
CY2020	us-gaap	Profit Loss ProfitLoss	-762846000
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	3632000
CY2020	us-gaap	Preferred Stock Dividends Per Share Declared PreferredStockDividendsPerShareDeclared	3.00
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	14610000
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	13859000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	664000
CY2020	us-gaap	Stock Granted During Period Value Sharebased Compensation StockGrantedDuringPeriodValueSharebasedCompensation	24638000
CY2020	nbr	Noncontrolling Interest Contribution NoncontrollingInterestContribution	-5082000
CY2020	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	17442000
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	1188000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1256808000
CY2020	us-gaap	Nature Of Operations NatureOfOperations	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><b style="font-weight:bold;">Note 1 Nature of Operations</b></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><span style="font-weight:bold;visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;">Unless the context requires otherwise, references in this annual report to “we,” “us,” “our,” “the Company,” or “Nabors” mean Nabors Industries Ltd., together with our subsidiaries where the context requires. References in this annual report to “Nabors Delaware” mean Nabors Industries, Inc., a wholly owned subsidiary of Nabors.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;">Our business is comprised of our global land-based and offshore drilling rig operations and other rig related services and technologies. These services and technologies include tubular running services, wellbore placement solutions, directional drilling, measurement-while-drilling (“MWD”), logging-while-drilling (“LWD”) systems and services, equipment manufacturing, rig instrumentation and drilling optimization software.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:18pt;margin:0pt;">The outbreak of the novel coronavirus (“COVID-19”), together with actions by large oil and natural gas producing countries, led to decreases in commodity prices, specifically oil and natural gas prices, resulting from oversupply and demand weakness. These price decreases caused significant disruptions and volatility in the global marketplace during 2020. Lower prices and the resulting weakness in demand for our services, negatively affected our results of operations and cash flows and uncertainty remains regarding the length and impact of COVID-19 on the energy industry and the outlook for our business.</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><span style="visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;">The consolidated financial statements and related footnotes are presented in accordance with U.S. GAAP.</p>
CY2020Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	23500000
CY2019Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	35000000.0
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	133424000
CY2019Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	130414000
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	3452000
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	5498000
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	23709000
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	40429000
CY2020Q4	us-gaap	Inventory Net InventoryNet	160585000
CY2019Q4	us-gaap	Inventory Net InventoryNet	176341000
CY2020	nbr	Percentage Of Growth Rate Used To Calculate Terminal Value Of Each Reporting Unit PercentageOfGrowthRateUsedToCalculateTerminalValueOfEachReportingUnit	0.02
CY2018Q4	us-gaap	Goodwill Goodwill	183914000
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	155973000
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	439000
CY2019Q4	us-gaap	Goodwill Goodwill	28380000
CY2019Q4	us-gaap	Goodwill Goodwill	28380000
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	27798000
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-582000
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	156000000.0
CY2020Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	27800000
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><span style="font-style:italic;font-weight:bold;">Use of Estimates</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><span style="font-size:8pt;font-style:italic;font-weight:bold;visibility:hidden;"></span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;">The preparation of financial statements in conformity with U.S. GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the balance sheet date and the amounts of revenues and expenses recognized during the reporting period. Actual results could differ from such estimates. Areas where critical accounting estimates are made by management include:</p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-indent:36pt;margin:0pt;"><span style="visibility:hidden;"></span></p><table style="border-collapse:collapse;font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:0pt;margin-top:0pt;table-layout:fixed;width:100%;border:0pt;"><tr><td style="width:36pt;"/><td style="font-family:'Times New Roman';font-size:10pt;vertical-align:text-top;white-space:nowrap;width:18pt;padding:0pt;">●</td><td style="padding:0pt;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">depreciation of property, plant and equipment;</span></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0pt 54pt;"><span style="margin-left:0pt;visibility:hidden;"></span></p><table style="border-collapse:collapse;font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:0pt;margin-top:0pt;table-layout:fixed;width:100%;border:0pt;"><tr><td style="width:36pt;"/><td style="font-family:'Times New Roman';font-size:10pt;vertical-align:text-top;white-space:nowrap;width:18pt;padding:0pt;">●</td><td style="padding:0pt;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">impairment of long-lived assets;</span></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0pt 54pt;"><span style="margin-left:0pt;visibility:hidden;"></span></p><table style="border-collapse:collapse;font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:0pt;margin-top:0pt;table-layout:fixed;width:100%;border:0pt;"><tr><td style="width:36pt;"/><td style="font-family:'Times New Roman';font-size:10pt;vertical-align:text-top;white-space:nowrap;width:18pt;padding:0pt;">●</td><td style="padding:0pt;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">impairment of goodwill and intangible assets;</span></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt;"><span style="visibility:hidden;"></span></p><table style="border-collapse:collapse;font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:0pt;margin-top:0pt;table-layout:fixed;width:100%;border:0pt;"><tr><td style="width:36pt;"/><td style="font-family:'Times New Roman';font-size:10pt;vertical-align:text-top;white-space:nowrap;width:18pt;padding:0pt;">●</td><td style="padding:0pt;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">income taxes;</span></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0pt 54pt;"><span style="margin-left:0pt;visibility:hidden;"></span></p><table style="border-collapse:collapse;font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:0pt;margin-top:0pt;table-layout:fixed;width:100%;border:0pt;"><tr><td style="width:36pt;"/><td style="font-family:'Times New Roman';font-size:10pt;vertical-align:text-top;white-space:nowrap;width:18pt;padding:0pt;">●</td><td style="padding:0pt;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">litigation and self-insurance reserves; and</span></td></tr></table><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;margin:0pt 0pt 0pt 54pt;"><span style="margin-left:0pt;visibility:hidden;"></span></p><table style="border-collapse:collapse;font-family:'Times New Roman','Times','serif';font-size:10pt;margin-bottom:0pt;margin-top:0pt;table-layout:fixed;width:100%;border:0pt;"><tr><td style="width:36pt;"/><td style="font-family:'Times New Roman';font-size:10pt;vertical-align:text-top;white-space:nowrap;width:18pt;padding:0pt;">●</td><td style="padding:0pt;"><span style="color:#000000;font-family:'Times New Roman','Times','serif';font-size:10pt;font-style:normal;font-weight:normal;text-align:left;">fair value of assets acquired and liabilities assumed.</span></td></tr></table>
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	24600000
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	24700000
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	27798000
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	155973000
CY2020	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	83624000
CY2019	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	47731000
CY2020	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	24543000
CY2020	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	19070000
CY2019	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	11447000
CY2018	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	14323000
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	19590000
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	43220000
CY2020	nbr	Asset Impairment And Other Charges AssetImpairmentAndOtherCharges	410631000
CY2019	nbr	Asset Impairment And Other Charges AssetImpairmentAndOtherCharges	301939000
CY2018	nbr	Asset Impairment And Other Charges AssetImpairmentAndOtherCharges	139178000
CY2020	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	83600000
CY2020	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	24500000
CY2020	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	19100000
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	19600000
CY2019	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	47700000
CY2019	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	11400000
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	43200000
CY2018	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	14300000
CY2020Q4	nbr	Fair Value Transfers Between Level1 And Level2 FairValueTransfersBetweenLevel1AndLevel2	0
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	9500000
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	16500000
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	26400000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	13112640000
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	13615622000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	9126933000
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	8685073000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3985707000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4930549000
CY2020	us-gaap	Depreciation Depreciation	851800000
CY2019	us-gaap	Depreciation Depreciation	869600000
CY2018	us-gaap	Depreciation Depreciation	860600000
CY2020	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	154200000
CY2019	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	248600000
CY2018	us-gaap	Cost Of Property Repairs And Maintenance CostOfPropertyRepairsAndMaintenance	265600000
CY2020	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	700000
CY2019	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1500000
CY2018	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1000000.0
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	2990971000
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	3363552000
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	22270000
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	30332000
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2968701000
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3333220000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-705567000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-588922000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	86500000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	822361000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	324322000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	853335000
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	949587000
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	3036105000
CY2020Q4	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	952900000
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	69200000
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	11500000
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5300000
CY2021Q1	us-gaap	Debt Instrument Repurchased Face Amount DebtInstrumentRepurchasedFaceAmount	23000000.0
CY2021Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	15100000
CY2020Q4	nbr	Number Of Line Of Credit Facility NumberOfLineOfCreditFacility	18
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	32869000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-518794000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-2020000
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	318000
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1811000
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-7430000
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	55625000
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2388000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1799000
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3222000
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-113000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	64716000
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	35951000
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	76881000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	57286000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	91576000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	79269000
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	62751000
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	54060000
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	49375000
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-9759000
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	38822000
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	861000
CY2019	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	1107000
CY2018	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-10626000
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3433000
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3540000
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1698000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	57286000
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	91576000
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	79269000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.081
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.155
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.153
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	3618227000
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	2834851000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1594000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	6577000
CY2020Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	3878000
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	8873000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	84502000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	97215000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	2086000
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves	2248000
CY2019Q4	nbr	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Interest DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedInterest	172120000
CY2020Q4	nbr	Deferred Tax Assets Depreciation And Amortization For Tax In Excess Of Book Expense DeferredTaxAssetsDepreciationAndAmortizationForTaxInExcessOfBookExpense	44837000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	110003000
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	95588000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3865127000
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	3217472000
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	3602144000
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	2813567000
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	262983000
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	403905000
CY2019Q4	nbr	Deferred Tax Liabilities Depreciation Amortization And Depletion For Tax In Excess Of Book Expense DeferredTaxLiabilitiesDepreciationAmortizationAndDepletionForTaxInExcessOfBookExpense	80155000
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	17388000
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	21055000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	17388000
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	101210000
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	245595000
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	302695000
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	247171000
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	305844000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1576000
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	3149000
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	245595000
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	302695000
CY2020Q4	us-gaap	Operating Loss Carryforwards Valuation Allowance OperatingLossCarryforwardsValuationAllowance	3400000000
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25770000
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25711000
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	33203000
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1887000
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1003000
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	308000
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	953000
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	860000
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	7800000
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	84000
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26704000
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25770000
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	25711000
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	26700000
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	7600000
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	7700000
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	6700000
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	-600000
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	800000
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1000000.0
CY2020Q4	us-gaap	Capital Units Authorized CapitalUnitsAuthorized	57000000.0
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	32000000.0
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.05
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	25000000.0
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2018	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	0
CY2019	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	0
CY2020	us-gaap	Stock Issued During Period Shares Treasury Stock Reissued StockIssuedDuringPeriodSharesTreasuryStockReissued	0
CY2020Q2	nbr	Minimum Percentage Beneficial Ownership For Rights To Become Exercisable MinimumPercentageBeneficialOwnershipForRightsToBecomeExercisable	0.049
CY2020Q2	nbr	Minimum Percentage Beneficial Ownership For Rights To Become Exercisable MinimumPercentageBeneficialOwnershipForRightsToBecomeExercisable	0.049
CY2020Q2	nbr	Percentage Price Discount For Stock Purchase When Rights Are Triggered PercentagePriceDiscountForStockPurchaseWhenRightsAreTriggered	0.50
CY2020Q2	nbr	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right Post Right Trigger ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRightPostRightTrigger	1
CY2020Q2	nbr	Rights Redemption Price Per Share RightsRedemptionPricePerShare	0.01
CY2020	nbr	Premiums Paid Related To Related Party Insurance Agreements PremiumsPaidRelatedToRelatedPartyInsuranceAgreements	0
CY2020	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	612700000
CY2019	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	672900000
CY2018	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	723800000
CY2018	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	200000
CY2020Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	90400000
CY2018	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	11098000
CY2020	nbr	Distributed And Undistributed Earnings Loss Allocated To Participating Securities Basic DistributedAndUndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	125000
CY2019	nbr	Distributed And Undistributed Earnings Loss Allocated To Participating Securities Basic DistributedAndUndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	459000
CY2018	nbr	Distributed And Undistributed Earnings Loss Allocated To Participating Securities Basic DistributedAndUndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	1819000
CY2019Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	80600000
CY2020	nbr	Minimum Period Of Operating Lease MinimumPeriodOfOperatingLease	P30D
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	12400000
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	15900000
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	18700000
CY2020Q4	nbr	Guarantee Obligations Maximum Exposure In Year One GuaranteeObligationsMaximumExposureInYearOne	184675000
CY2020Q4	nbr	Guarantee Obligations Maximum Exposure In Year Three GuaranteeObligationsMaximumExposureInYearThree	112000
CY2020Q4	nbr	Guarantee Obligations Maximum Exposure After Year Three GuaranteeObligationsMaximumExposureAfterYearThree	1140000
CY2020Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	185927000
CY2020	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-762853000
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-680498000
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-598063000
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	42795000
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	22375000
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	28222000
CY2020	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	14611000
CY2019	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	17244000
CY2018	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	12305000
CY2020	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	17442000
CY2019	us-gaap	Noncontrolling Interest In Net Income Loss Other Noncontrolling Interests Redeemable NoncontrollingInterestInNetIncomeLossOtherNoncontrollingInterestsRedeemable	20534000
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-837826000
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-741110000
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-651507000
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	7000
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-12000
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-14663000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7059000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7032000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6688000
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-118.69
CY2019	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-105.39
CY2018	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-97.42
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-2.19
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-118.69
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-105.39
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-99.61
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-837826000
CY2019	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-741110000
CY2018	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-651507000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-837826000
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-741110000
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-651507000
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	7000
CY2019	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-12000
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-14663000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7059000
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	7032000
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6688000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7059000
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	7032000
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6688000
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-118.69
CY2019	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-105.39
CY2018	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-97.42
CY2018	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-2.19
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-118.69
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-105.39
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-99.61
CY2020Q2	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	50
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	66000
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	40000
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	87000
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	82462000
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	97003000
CY2020Q4	nbr	Deferred Revenue And Proceeds On Insurance And Asset Sales DeferredRevenueAndProceedsOnInsuranceAndAssetSales	61473000
CY2019Q4	nbr	Deferred Revenue And Proceeds On Insurance And Asset Sales DeferredRevenueAndProceedsOnInsuranceAndAssetSales	89051000
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	28602000
CY2019Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	31472000
CY2020Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	7788000
CY2019Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	30214000
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	62935000
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	51316000
CY2020Q4	us-gaap	Litigation Reserve Current LitigationReserveCurrent	13976000
CY2019Q4	us-gaap	Litigation Reserve Current LitigationReserveCurrent	14736000
CY2020Q4	nbr	Dividends Declared And Payable DividendsDeclaredAndPayable	3653000
CY2019Q4	nbr	Dividends Declared And Payable DividendsDeclaredAndPayable	7832000
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	15196000
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	11658000
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	276085000
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	333282000
CY2020	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	4705000
CY2019	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	8424000
CY2018	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	4957000
CY2020	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-3267000
CY2019	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	1794000
CY2018	us-gaap	Marketable Securities Gain Loss MarketableSecuritiesGainLoss	-14456000
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	1438000
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	10218000
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	-9499000
CY2020	nbr	Losses Gains On Sales Retirements And Involuntary Conversions Of Long Lived Assets LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets	12363000
CY2019	nbr	Losses Gains On Sales Retirements And Involuntary Conversions Of Long Lived Assets LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets	7141000
CY2018	nbr	Losses Gains On Sales Retirements And Involuntary Conversions Of Long Lived Assets LossesGainsOnSalesRetirementsAndInvoluntaryConversionsOfLongLivedAssets	11789000
CY2020	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	4249000
CY2019	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	5226000
CY2018	us-gaap	Litigation Settlement Expense LitigationSettlementExpense	9939000
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-12125000
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-20929000
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-4156000
CY2020	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	170000
CY2019	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	72000
CY2018	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	-3648000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-28567000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-33224000
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-29532000
CY2020Q4	nbr	Income Tax Refunded IncomeTaxRefunded	17505000
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	6553000
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	11383000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	157437000
CY2019	us-gaap	Interest Paid Net InterestPaidNet	174357000
CY2018	us-gaap	Interest Paid Net InterestPaidNet	202803000
CY2020	nbr	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	-1188000
CY2019	nbr	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	-7624000
CY2018	nbr	Change In Capital Expenditures Incurred But Not Yet Paid ChangeInCapitalExpendituresIncurredButNotYetPaid	-8556000
CY2018	nbr	Net Change In Assets Related To Increase In Redeemable Noncontrolling Interest In Subsidiary NetChangeInAssetsRelatedToIncreaseInRedeemableNoncontrollingInterestInSubsidiary	43928000
CY2019	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	2929000
CY2018	us-gaap	Fair Value Of Assets Acquired FairValueOfAssetsAcquired	48053000
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	11436000
CY2018	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	34489000
CY2019	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	2929000
CY2018	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	25000000
CY2018	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	4141000
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2929000
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	20859000
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	718364000
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	533931000
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	438352000
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	443396000
CY2020Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-374269000
CY2020Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-137968000
CY2020Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-146682000
CY2020Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-103934000
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-93000
CY2020Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	23000
CY2020Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	22000
CY2020Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	55000
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-374362000
CY2020Q2	us-gaap	Profit Loss ProfitLoss	-137945000
CY2020Q3	us-gaap	Profit Loss ProfitLoss	-146660000
CY2020Q4	us-gaap	Profit Loss ProfitLoss	-103879000
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	17465000
CY2020Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10167000
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10805000
CY2020Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4358000
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-391827000
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-148112000
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-157465000
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	-108237000
CY2020Q1	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3652000
CY2020Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3653000
CY2020Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3653000
CY2020Q4	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	3653000
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-395479000
CY2020Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-151765000
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-161118000
CY2020Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-111890000
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-56.72
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-22.13
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-23.42
CY2020Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-16.46
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
CY2020Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.01
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-56.73
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-22.13
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-23.42
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-16.45
CY2020Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-56.72
CY2020Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-22.13
CY2020Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-23.42
CY2020Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-16.46
CY2020Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.01
CY2020Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.01
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-56.73
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-22.13
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-23.42
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-16.45
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-18.11
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	799640000
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	771406000
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	758076000
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	714261000
CY2019Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-103376000
CY2019Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-192801000
CY2019Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-99788000
CY2019Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-284533000
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-157000
CY2019Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-34000
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	157000
CY2019Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	22000
CY2019Q1	us-gaap	Profit Loss ProfitLoss	-103533000
CY2019Q2	us-gaap	Profit Loss ProfitLoss	-192835000
CY2019Q3	us-gaap	Profit Loss ProfitLoss	-99631000
CY2019Q4	us-gaap	Profit Loss ProfitLoss	-284511000
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14176000
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10729000
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	19297000
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-21827000
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-117709000
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-203564000
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-118928000
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	-262684000
CY2019Q1	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4313000
CY2019Q2	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4312000
CY2019Q3	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4310000
CY2019Q4	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	4309000
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-122022000
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-207876000
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-123238000
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-266993000
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-30.31
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-18.27
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-38.66
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.02
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-18.13
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-30.31
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-18.25
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-38.66
CY2019Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-18.11
CY2019Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-30.31
CY2019Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-18.27
CY2019Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-38.66
CY2019Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2019Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.02
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-18.13
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-30.31
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-18.25
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-38.66
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	5
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2134043000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3043383000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3057619000
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-171461000
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	89145000
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	58621000
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-5000
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1000
CY2020	us-gaap	Investment Income Net InvestmentIncomeNet	1438000
CY2019	us-gaap	Investment Income Net InvestmentIncomeNet	10218000
CY2018	us-gaap	Investment Income Net InvestmentIncomeNet	-9499000
CY2020	us-gaap	Interest Expense InterestExpense	206274000
CY2019	us-gaap	Interest Expense InterestExpense	204311000
CY2018	us-gaap	Interest Expense InterestExpense	227124000
CY2020	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	228274000
CY2019	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	11468000
CY2018	us-gaap	Debt Securities Gain Loss DebtSecuritiesGainLoss	-5268000
CY2020	nbr	Asset Impairment And Other Charges AssetImpairmentAndOtherCharges	410631000
CY2019	nbr	Asset Impairment And Other Charges AssetImpairmentAndOtherCharges	301939000
CY2018	nbr	Asset Impairment And Other Charges AssetImpairmentAndOtherCharges	139178000
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-28567000
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-33224000
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-29532000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-705567000
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-588922000
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-518794000
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	853699000
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	876091000
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	866870000
CY2020	nbr	Capital Expenditures CapitalExpenditures	189706000
CY2019	nbr	Capital Expenditures CapitalExpenditures	423967000
CY2018	nbr	Capital Expenditures CapitalExpenditures	453435000
CY2020Q4	us-gaap	Assets Assets	5503428000
CY2019Q4	us-gaap	Assets Assets	6760658000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2134043000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3043383000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3057619000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	3985707000
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4930549000
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5467870000
CY2019Q4	us-gaap	Goodwill Goodwill	28380000
CY2018Q4	us-gaap	Goodwill Goodwill	183914000
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2134043000
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3043383000
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3057619000
CY2019Q4	nbr	Trade Receivables Current TradeReceivablesCurrent	507000000.0
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	48600000
CY2019Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	24900000
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	66800000
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	70500000
CY2020Q4	nbr	Trade Receivables Current TradeReceivablesCurrent	427200000
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	23500000
CY2020Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	6800000
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	42800000
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	44200000
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.61
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.16
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.23
CY2020Q4	nbr	Contract Asset Amortization Percentage Recognized ContractAssetAmortizationPercentageRecognized	0.64
CY2020Q4	nbr	Contract Asset Amortization Percentage Second Year After Latest Fiscal Year ContractAssetAmortizationPercentageSecondYearAfterLatestFiscalYear	0.22
CY2020	nbr	Contract Asset Amortization Percentage Year Three Or Thereafter ContractAssetAmortizationPercentageYearThreeOrThereafter	0.14
CY2020	nbr	Lease Practical Expedient Transition Approach LeasePracticalExpedientTransitionApproach	true
CY2020	us-gaap	Lease Practical Expedients Package LeasePracticalExpedientsPackage	true
CY2020	nbr	Lease Practical Expedient Lease Capitalization LeasePracticalExpedientLeaseCapitalization	true
CY2020	nbr	Lease Practical Expedient Separate Lease Non Lease Components LeasePracticalExpedientSeparateLeaseNonLeaseComponents	false
CY2020	nbr	Lease Practical Expedient Land Easement LeasePracticalExpedientLandEasement	true
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	32312000
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	46647000
CY2020Q4	nbr	Lease Assets LeaseAssets	32312000
CY2019Q4	nbr	Lease Assets LeaseAssets	46647000
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	8305000
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	13479000
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	24656000
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	33396000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	32961000
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	46875000
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	15235000
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	16154000
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1165000
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2568000
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	512000
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	605000
CY2020	us-gaap	Lease Cost LeaseCost	16912000
CY2019	us-gaap	Lease Cost LeaseCost	19327000
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	15235000
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	16154000
CY2019Q4	nbr	Right Of Use Assets Obtained In Exchange For Operating Lease Obligations RightOfUseAssetsObtainedInExchangeForOperatingLeaseObligations	17852000
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y10M28D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y1M17D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0607
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0597
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	10030000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	6959000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	4816000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2577000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2254000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	15176000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	41812000
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	8851000
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	32961000

Files In Submission

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$NBR
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2020 Q4 Form 10-K Financial Statement

#000155837021001631 Filed on February 24, 2021

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Balance Sheet

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$NBR NABORS INDUSTRIES LTD Stock $nbr

2020 Q4 Form 10-K Financial Statement

#000155837021001631 Filed on February 24, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NBR
NABORS INDUSTRIES LTD Stock $nbr