$HLX
HELIX ENERGY SOLUTIONS GROUP INC Stock $hlx

$hlx Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000086682921000007 Filed on February 25, 2021

Income Statement

Concept	2020 Q4	2020	2019 Q4
Revenue	$159.9M	$733.6M	$170.7M
YoY Change	-6.36%	-2.44%	7.83%
Cost Of Revenue	$146.2M	$653.6M	$144.2M
YoY Change	1.39%	6.44%	-0.21%
Gross Profit	$13.70M	$79.91M	$26.58M
YoY Change	-48.47%	-42.03%	92.43%
Gross Profit Margin	8.56%	10.89%	15.56%
Selling, General & Admin	$12.80M	$61.08M	$20.90M
YoY Change	-38.76%	-12.54%	20.81%
% of Gross Profit	93.46%	76.44%	78.64%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$34.10M	$133.7M	$28.30M
YoY Change	20.49%	18.62%	4.04%
% of Gross Profit	249.0%	167.33%	106.49%
Operating Expenses	$12.90M	$61.08M	$20.90M
YoY Change	-38.28%	-12.54%	20.81%
Operating Profit	$795.0K	$13.03M	$5.676M
YoY Change	-85.99%	-80.84%	-262.68%
Interest Expense	-$7.900M	$30.54M	-$600.0K
YoY Change	1216.67%	-2.08%	-91.89%
% of Operating Profit	-993.71%	234.46%	-10.57%
Other Income/Expense, Net	$8.600M	$4.724M	$4.000M
YoY Change	115.0%	305.49%	-335.29%
Pretax Income	$1.500M	$1.383M	$9.100M
YoY Change	-83.52%	-97.89%	-172.22%
Income Tax	-$2.600M	-$18.70M	$1.100M
% Of Pretax Income	-173.33%	-1352.21%	12.09%
Net Earnings	$4.163M	$22.17M	$8.052M
YoY Change	-48.3%	-61.72%	-158.57%
Net Earnings / Revenue	2.6%	3.02%	4.72%
Basic Earnings Per Share	$0.03	$0.13	$0.05
Diluted Earnings Per Share	$0.03	$0.13	$0.05
COMMON SHARES
Basic Shares Outstanding	150.2M shares	149.0M	148.8M shares
Diluted Shares Outstanding		149.9M

Balance Sheet

Concept	2020 Q4	2020	2019 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$291.3M	$291.3M	$208.4M
YoY Change	39.78%	39.78%	-25.44%
Cash & Equivalents	$291.3M	$291.3M	$208.4M
Short-Term Investments
Other Short-Term Assets	$102.1M	$49.10M	$50.45M
YoY Change	102.36%	-52.7%	-2.22%
Inventory
Prepaid Expenses	$15.90M		$12.64M
Receivables	$132.2M	$134.7M	$125.5M
Other Receivables	$50.50M	$50.50M	$0.00
Total Short-Term Assets	$525.6M	$525.6M	$438.5M
YoY Change	19.88%	19.86%	-2.76%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.783B	$1.933B	$1.873B
YoY Change	-4.79%	-6.81%	2.51%
Goodwill	$0.00		$7.157M
YoY Change	-100.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$40.01M	$36.20M	$84.51M
YoY Change	-52.65%	-21.65%	20.63%
Total Long-Term Assets	$1.973B	$1.973B	$2.158B
YoY Change	-8.6%	-8.6%	13.78%
TOTAL ASSETS
Total Short-Term Assets	$525.6M	$525.6M	$438.5M
Total Long-Term Assets	$1.973B	$1.973B	$2.158B
Total Assets	$2.498B	$2.498B	$2.597B
YoY Change	-3.79%	-3.79%	10.61%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$50.02M	$50.00M	$69.06M
YoY Change	-27.56%	-27.64%	25.98%
Accrued Expenses	$87.04M	$130.5M	$62.39M
YoY Change	39.5%	26.45%	-27.11%
Deferred Revenue	$8.140M		$11.57M
YoY Change	-29.63%		14.5%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$90.65M	$90.70M	$99.73M
YoY Change	-9.1%	-9.03%	111.06%
Total Short-Term Liabilities	$279.3M	$279.3M	$285.0M
YoY Change	-1.98%	-2.0%	48.81%
LONG-TERM LIABILITIES
Long-Term Debt	$258.9M	$258.9M	$306.1M
YoY Change	-15.42%	-15.42%	-22.12%
Other Long-Term Liabilities	$3.878M	$104.9M	$38.64M
YoY Change	-89.96%	-44.93%	-2.26%
Total Long-Term Liabilities	$262.8M	$363.8M	$344.8M
YoY Change	-23.78%	-26.74%	-20.3%
TOTAL LIABILITIES
Total Short-Term Liabilities	$279.3M	$279.3M	$285.0M
Total Long-Term Liabilities	$262.8M	$363.8M	$344.8M
Total Liabilities	$753.9M	$757.8M	$893.7M
YoY Change	-15.64%	-15.53%	22.43%
SHAREHOLDERS EQUITY
Retained Earnings	$464.5M		$445.4M
YoY Change	4.3%		16.27%
Common Stock	$1.328B		$1.319B
YoY Change	0.65%		0.78%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.740B	$1.741B	$1.700B
YoY Change
Total Liabilities & Shareholders Equity	$2.498B	$2.498B	$2.597B
YoY Change	-3.79%	-3.79%	10.61%

Cashflow Statement

Concept	2020 Q4	2020	2019 Q4
OPERATING ACTIVITIES
Net Income	$4.163M	$22.17M	$8.052M
YoY Change	-48.3%	-61.72%	-158.57%
Depreciation, Depletion And Amortization	$34.10M	$133.7M	$28.30M
YoY Change	20.49%	18.62%	4.04%
Cash From Operating Activities	$40.20M	$98.80M	$79.80M
YoY Change	-49.62%	-41.77%	73.86%
INVESTING ACTIVITIES
Capital Expenditures	-$1.000M	-$20.20M	-$95.30M
YoY Change	-98.95%	-85.66%	16.65%
Acquisitions		$0.00
YoY Change		-100.0%
Other Investing Activities	$100.0K	$0.00	$0.00
YoY Change			-100.0%
Cash From Investing Activities	-$1.000M	-$19.28M	-$95.20M
YoY Change	-98.95%	-86.46%	18.11%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-10.60M	-52.58M	-10.20M
YoY Change	3.92%	14.75%	0.0%
NET CHANGE
Cash From Operating Activities	40.20M	98.80M	79.80M
Cash From Investing Activities	-1.000M	-19.28M	-95.20M
Cash From Financing Activities	-10.60M	-52.58M	-10.20M
Net Change In Cash	28.60M	28.76M	-25.60M
YoY Change	-211.72%	-270.19%	-42.98%
FREE CASH FLOW
Cash From Operating Activities	$40.20M	$98.80M	$79.80M
Capital Expenditures	-$1.000M	-$20.20M	-$95.30M
Free Cash Flow	$41.20M	$119.0M	$175.1M
YoY Change	-76.47%	-61.68%	37.23%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000866829
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
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CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
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	001-32936
CY2020	dei	Entity Registrant Name EntityRegistrantName	HELIX ENERGY SOLUTIONS GROUP, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	MN
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	95-3409686
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	3505 West Sam Houston Parkway North
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 400
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1165943000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1049637000	USD
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77043
CY2020	dei	City Area Code CityAreaCode	281
CY2020	dei	Local Phone Number LocalPhoneNumber	618-0400
CY2020	dei	Security12b Title Security12bTitle	Common Stock
CY2020	dei	Trading Symbol TradingSymbol	HLX
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
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
CY2020	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
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CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	1338000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	285000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3824000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	5016000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-629000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-132000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-497000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	12835000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	5400000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-7166000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-4345000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8271000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	13120000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	9224000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2647000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	33204000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	66921000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	25951000	USD
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-2090000	USD
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-222000	USD
CY2018	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	0	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	90000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	138000	USD
CY2018	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-2000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-84000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	35204000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	67005000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	25951000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1567393000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	28598000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-7166000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	5016000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	15411000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-746000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9770000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1617779000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	57919000	USD
CY2019	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-222000	USD
CY2019	hlx	Reclassification Of Deferred Gain From Sale And Leaseback Transaction To Retained Earnings ReclassificationOfDeferredGainFromSaleAndLeasebackTransactionToRetainedEarnings	4560000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	5400000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	138000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	3824000	USD
CY2019	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	3396000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	143000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	143000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1032000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11284000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1699591000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	3455000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	22174000	USD
CY2020	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-2090000	USD
CY2020	hlx	Credit Losses Recognized In Retained Earnings Upon Adoption Of Asu201613 CreditLossesRecognizedInRetainedEarningsUponAdoptionOfASU201613	-620000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	12835000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	90000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	285000	USD
CY2020	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	2400000	USD
CY2020	us-gaap	Temporary Equity Accretion To Redemption Value TemporaryEquityAccretionToRedemptionValue	2400000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	33336000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt Subsequent Adjustments AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments	-18006000	USD
CY2020	hlx	Aggregate Cost Debt Instrument Convertible Associated Capped Call Transactions AggregateCostDebtInstrumentConvertibleAssociatedCappedCallTransactions	-10625000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	6964000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1740496000	USD
CY2020Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	3855000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	20084000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	57697000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	28598000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	133709000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	112720000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110522000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	6689000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	6261000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	5735000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3177000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3600000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3592000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	8568000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	11469000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	9925000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3883000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3485000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2430000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	216000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1439000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-3918000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	889000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	146000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	9239000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-18000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1183000	USD
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	601000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	3383000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	2324000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	2665000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	628000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Unrealized ForeignCurrencyTransactionGainLossUnrealized	-1466000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	8419000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3050000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-20920000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-22124000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-4456000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	964000	USD
CY2020	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	28664000	USD
CY2019	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-25383000	USD
CY2018	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	9904000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	10830000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-31265000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-1818000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	14521000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	6743000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-26543000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	98800000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	169669000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	196744000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	20244000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	140854000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	137083000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	4081000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	963000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2550000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	25000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1044000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-19281000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-142385000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-136014000	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	200000000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	125000000	USD
CY2020	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	183150000	USD
CY2019	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	0	USD
CY2018	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	60365000	USD
CY2020	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	35000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Other Long Term Debt ProceedsFromIssuanceOfOtherLongTermDebt	0	USD
CY2020	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	3500000	USD
CY2019	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	35442000	USD
CY2018	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	63807000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	35714000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	35714000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	35714000	USD
CY2020	hlx	Repayments Of Long Term Secured Debt RepaymentsOfLongTermSecuredDebt	7200000	USD
CY2019	hlx	Repayments Of Long Term Secured Debt RepaymentsOfLongTermSecuredDebt	6858000	USD
CY2018	hlx	Repayments Of Long Term Secured Debt RepaymentsOfLongTermSecuredDebt	6532000	USD
CY2020	hlx	Payment For Capped Call Transactions PaymentForCappedCallTransactions	10625000	USD
CY2019	hlx	Payment For Capped Call Transactions PaymentForCappedCallTransactions	0	USD
CY2018	hlx	Payment For Capped Call Transactions PaymentForCappedCallTransactions	0	USD
CY2020	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	7747000	USD
CY2019	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	1586000	USD
CY2018	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	3867000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5264000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1680000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1407000	USD
CY2020	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	622000	USD
CY2019	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	462000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	506000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-52578000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-45818000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-46186000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1818000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1636000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1677000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28759000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-16898000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	12867000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	262561000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	279459000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	266592000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	291320000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	262561000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	279459000	USD
CY2020	us-gaap	Nature Of Operations NatureOfOperations	<div style="margin-top:10pt;text-align:justify"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Note 1 — Organization</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Unless the context indicates otherwise, the terms “we,” “us” and “our” in this Annual Report refer collectively to Helix Energy Solutions Group, Inc. and its subsidiaries (“Helix” or the “Company”). We are an international offshore energy services company that provides specialty services to the offshore energy industry, with a focus on well intervention and robotics operations. We provide services primarily in deepwater in the Gulf of Mexico, Brazil, North Sea, Asia Pacific and West Africa regions.</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Our Operations</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our services are segregated into three reportable business segments: Well Intervention, Robotics and Production Facilities (Note 15).</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our Well Intervention segment includes our vessels and/or equipment used to access offshore wells for the purpose of performing well enhancement or decommissioning operations primarily in the Gulf of Mexico, Brazil, the North Sea and West Africa. Our well intervention vessels include the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Q4000</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Q5000</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Q7000</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Seawell</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Well Enhancer</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, and two chartered monohull vessels, the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Siem Helix</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">1</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> and the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Siem Helix</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">2</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">. Our well intervention equipment includes intervention riser systems (“IRSs”), subsea intervention lubricators (“SILs”) and the Riserless Open-water Abandonment Module (“ROAM”), some of which we provide on a stand-alone basis.</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our Robotics segment includes remotely operated vehicles (“ROVs”), trenchers and a ROVDrill, which are designed to complement well intervention services and offshore construction to both the oil and gas and the renewable energy markets globally. Our Robotics segment also includes two robotics support vessels under long-term charter, the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Grand Canyon</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">II</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> and the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Grand Canyon</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">III</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, as well as spot vessels as needed.</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our Production Facilities segment includes the </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Helix Producer</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">I</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> (the “</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">HP I</span><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">”), a ship-shaped dynamically positioned floating production vessel, the Helix Fast Response System (the “HFRS”), and our ownership of oil and gas properties. All of our current Production Facilities activities are located in the Gulf of Mexico.</span></div>
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates.</span></div>
CY2019Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	54100000	USD
CY2020Q4	hlx	Deferred Recertification And Dry Dock Costs Net DeferredRecertificationAndDryDockCostsNet	21500000	USD
CY2019Q4	hlx	Deferred Recertification And Dry Dock Costs Net DeferredRecertificationAndDryDockCostsNet	16100000	USD
CY2020Q4	hlx	Accumulated Amortization Deferred Recertification And Dry Dock Costs AccumulatedAmortizationDeferredRecertificationAndDryDockCosts	21800000	USD
CY2019Q4	hlx	Accumulated Amortization Deferred Recertification And Dry Dock Costs AccumulatedAmortizationDeferredRecertificationAndDryDockCosts	15700000	USD
CY2020	hlx	Recertification And Dry Dock Amortization Expense RecertificationAndDryDockAmortizationExpense	14300000	USD
CY2019	hlx	Recertification And Dry Dock Amortization Expense RecertificationAndDryDockAmortizationExpense	12400000	USD
CY2018	hlx	Recertification And Dry Dock Amortization Expense RecertificationAndDryDockAmortizationExpense	8300000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	4600000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1500000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-4300000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	2446000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	740000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	15904000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	12635000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	23522000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	28340000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	20787000	USD
CY2019Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	1261000	USD
CY2020Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	29782000	USD
CY2019Q4	us-gaap	Nontrade Receivables Current NontradeReceivablesCurrent	0	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	9651000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	7474000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	102092000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	50450000	USD
CY2020Q4	hlx	Deferred Recertification And Dry Dock Costs Net DeferredRecertificationAndDryDockCostsNet	21464000	USD
CY2019Q4	hlx	Deferred Recertification And Dry Dock Costs Net DeferredRecertificationAndDryDockCostsNet	16065000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	861000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	14531000	USD
CY2020Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	12544000	USD
CY2019Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	12544000	USD
CY2020Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	0	USD
CY2019Q4	us-gaap	Nontrade Receivables Noncurrent NontradeReceivablesNoncurrent	27264000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	7157000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	3809000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	3847000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	1335000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	3100000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	40013000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	84508000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	30913000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	24768000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	31417000	USD
CY2020Q4	us-gaap	Interest And Dividends Payable Current InterestAndDividendsPayableCurrent	7098000	USD
CY2019Q4	us-gaap	Interest And Dividends Payable Current InterestAndDividendsPayableCurrent	3942000	USD
CY2020Q4	hlx	Investee Losses In Excess Of Investment Current InvesteeLossesInExcessOfInvestmentCurrent	1499000	USD
CY2019Q4	hlx	Investee Losses In Excess Of Investment Current InvesteeLossesInExcessOfInvestmentCurrent	4069000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	8140000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	11568000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	0	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	14617000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	11393000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	87035000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	62389000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	1869000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	8286000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	0	USD
CY2019Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	28258000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	2009000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Noncurrent OtherAccruedLiabilitiesNoncurrent	2100000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	3878000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	38644000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	37524000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2948907000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2922274000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	2100000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	64742000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	70860000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	15021000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	13780000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	20384000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	1286000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	1391000	USD
CY2020	us-gaap	Lease Cost LeaseCost	116001000	USD
CY2019	us-gaap	Lease Cost LeaseCost	103633000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	147800000	USD
CY2018	us-gaap	Operating Leases Rent Expense Sublease Rentals1 OperatingLeasesRentExpenseSubleaseRentals1	1400000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	60649000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	57541000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	39229000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	6844000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	2340000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	4054000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	170657000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	18049000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	152608000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	51599000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	101009000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	66820000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	60452000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	57363000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	39202000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	6819000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	6251000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	236907000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	31295000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	205612000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	53785000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	151827000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y1M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0753
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0754
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	66026000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	71698000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	516000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1168000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	258912000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	45692000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	22540000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	9477000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	7753000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	349563000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	405853000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	90651000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	99731000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	306122000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Rolling Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths	90882000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Rolling Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearTwo	42937000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Rolling Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearThree	38333000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Rolling Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFour	8749000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Rolling Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingYearFive	9186000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Rolling After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInRollingAfterYearFive	214645000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	404732000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	45692000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	9477000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	349563000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	90651000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	258912000	USD
CY2020	us-gaap	Interest Expense InterestExpense	30538000	USD
CY2019	us-gaap	Interest Expense InterestExpense	31186000	USD
CY2018	us-gaap	Interest Expense InterestExpense	32617000	USD
CY2020	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	1182000	USD
CY2019	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	20246000	USD
CY2018	us-gaap	Interest Costs Capitalized Adjustment InterestCostsCapitalizedAdjustment	15629000	USD
CY2020	us-gaap	Interest Income Other InterestIncomeOther	825000	USD
CY2019	us-gaap	Interest Income Other InterestIncomeOther	2607000	USD
CY2018	us-gaap	Interest Income Other InterestIncomeOther	3237000	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-28531000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-8333000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-13751000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-14818000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4374000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4830000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-3883000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	3485000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2430000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18701000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7859000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2400000	USD
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-15074000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	3715000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-3161000	USD
CY2020	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	-3627000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	4144000	USD
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	5561000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18701000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7859000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2400000	USD
CY2020	hlx	Deferred Income Tax Expense From Cares Act DeferredIncomeTaxExpenseFromCARESAct	11300000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-3406000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2219000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-28838000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	4789000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	63337000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	59836000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1383000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	65556000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	30998000	USD
CY2020	hlx	Net Income Tax Benefit From Cares Act NetIncomeTaxBenefitFromCARESAct	7600000	USD
CY2020	hlx	Current Income Tax Benefit From Cares Act CurrentIncomeTaxBenefitFromCARESAct	18900000	USD
CY2020	hlx	Net Income Tax Benefit From Cares Act NetIncomeTaxBenefitFromCARESAct	7600000	USD
CY2020	hlx	Number Of Foreign Subsidiaries NumberOfForeignSubsidiaries	2	numberOfForeignSubsidiaries
CY2020	hlx	Net Deferred Income Tax Benefits From Foreign Subsidiary Restructuring NetDeferredIncomeTaxBenefitsFromForeignSubsidiaryRestructuring	8300000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	290000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	13767000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6510000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-3426000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-2.477
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-6557000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.100
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-4941000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.159
CY2020	hlx	Effective Income Tax Rate Reconciliation Cares Act Amount EffectiveIncomeTaxRateReconciliationCARESActAmount	-7596000	USD
CY2020	hlx	Effective Income Tax Rate Reconciliation Cares Act Percent EffectiveIncomeTaxRateReconciliationCARESActPercent	-5.492
CY2019	hlx	Effective Income Tax Rate Reconciliation Cares Act Amount EffectiveIncomeTaxRateReconciliationCARESActAmount	0	USD
CY2019	hlx	Effective Income Tax Rate Reconciliation Cares Act Percent EffectiveIncomeTaxRateReconciliationCARESActPercent	0
CY2018	hlx	Effective Income Tax Rate Reconciliation Cares Act Amount EffectiveIncomeTaxRateReconciliationCARESActAmount	0	USD
CY2018	hlx	Effective Income Tax Rate Reconciliation Cares Act Percent EffectiveIncomeTaxRateReconciliationCARESActPercent	0
CY2020	hlx	Effective Income Tax Reconciliation Subsidiary Restructuring Amount EffectiveIncomeTaxReconciliationSubsidiaryRestructuringAmount	-8333000	USD
CY2020	hlx	Effective Income Tax Reconciliation Subsidiary Restructuring Percent EffectiveIncomeTaxReconciliationSubsidiaryRestructuringPercent	-6.025
CY2019	hlx	Effective Income Tax Reconciliation Subsidiary Restructuring Amount EffectiveIncomeTaxReconciliationSubsidiaryRestructuringAmount	0	USD
CY2019	hlx	Effective Income Tax Reconciliation Subsidiary Restructuring Percent EffectiveIncomeTaxReconciliationSubsidiaryRestructuringPercent	0
CY2018	hlx	Effective Income Tax Reconciliation Subsidiary Restructuring Amount EffectiveIncomeTaxReconciliationSubsidiaryRestructuringAmount	0	USD
CY2018	hlx	Effective Income Tax Reconciliation Subsidiary Restructuring Percent EffectiveIncomeTaxReconciliationSubsidiaryRestructuringPercent	0
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	364000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.262
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	649000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.010
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	831000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.026
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-18701000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-13.522
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7859000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.120
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2400000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.077
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	153226000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	166239000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	9298000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	4643000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	162524000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	170882000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	59794000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	64178000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	11631000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	13203000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	71425000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	77381000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	19722000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	18631000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	110821000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	112132000	USD
CY2020Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	62200000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	700000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	300000	USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	240000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-51620000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Net Of Tax AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	-64455000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	0	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax	-285000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-51620000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-64740000	USD
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	6913705	shares
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	733555000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	751909000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	739818000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	2400000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	700000	USD
CY2020Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	10000000.0	USD
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	19900000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	11600000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	10100000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	11600000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	406700000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	301200000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	72900000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	32600000	USD
CY2019	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	2100000	USD
CY2020Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	24400000	USD
CY2019Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	42900000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	35800000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	31500000	USD
CY2018	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	33100000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	22174000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	57919000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	28598000	USD
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	140000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	487000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	273000	USD
CY2020	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	2400000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	143000	USD
CY2018	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	0	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19634000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	148993000	shares
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	57289000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	147536000	shares
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28325000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	146702000	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	19634000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	148993000	shares
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	57289000	USD
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	147536000	shares
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	28325000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	146702000	shares
CY2020	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	904000	shares
CY2019	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	2041000	shares
CY2018	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	128000	shares
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1000	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	6000	USD
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1000	USD
CY2020	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	19635000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	149897000	shares
CY2019	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	57295000	USD
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	149577000	shares
CY2018	us-gaap	Net Income Loss Attributable To Parent Diluted NetIncomeLossAttributableToParentDiluted	28326000	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	146830000	shares
CY2020	hlx	Number Of Active Incentive Plans NumberOfActiveIncentivePlans	1
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	733555000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	751909000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	739818000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	6689000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	13025000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	67997000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	51543000	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-28531000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-8333000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-13751000	USD
CY2020	hlx	Net Other Nonoperating Income Expense Excluding Interest NetOtherNonoperatingIncomeExpenseExcludingInterest	16889000	USD
CY2019	hlx	Net Other Nonoperating Income Expense Excluding Interest NetOtherNonoperatingIncomeExpenseExcludingInterest	5892000	USD
CY2018	hlx	Net Other Nonoperating Income Expense Excluding Interest NetOtherNonoperatingIncomeExpenseExcludingInterest	-6794000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1383000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	65556000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	30998000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	20244000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	140854000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	137083000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	133709000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	112720000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110522000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	733555000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	751909000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	739818000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1782964000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1872637000	USD
CY2020Q4	us-gaap	Assets Assets	2498278000	USD
CY2019Q4	us-gaap	Assets Assets	2596731000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	28258000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	0	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	0	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	53294000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	0	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	28296000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	0	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	822000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2655000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	2438000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	30913000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	28258000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	10200000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	15943000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1909000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	7369000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	7434000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	8856000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	5705000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1600000	USD
CY2019Q4	us-gaap	Derivative Instruments In Hedges Assets At Fair Value DerivativeInstrumentsInHedgesAssetsAtFairValue	44000	USD
CY2019Q4	us-gaap	Derivative Instruments In Hedges Liabilities At Fair Value DerivativeInstrumentsInHedgesLiabilitiesAtFairValue	401000	USD
CY2019Q4	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Liability At Fair Value DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue	601000	USD
CY2020	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-95000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-680000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-847000	USD
CY2020	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-452000	USD
CY2019	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-5470000	USD
CY2018	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	-7201000	USD
CY2020	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-81000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-378000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-901000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	181021000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	199147000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	193490000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	159897000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	2010000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	29576000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	34628000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	13695000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-13928000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	5450000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	24445000	USD
CY2020Q4	us-gaap	Profit Loss ProfitLoss	4117000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-11938000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	5450000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	24499000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	4163000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.04
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.03
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.03
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	166823000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	201728000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	212609000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	170749000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	16254000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	39934000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	55074000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	26576000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	1318000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	16823000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	31622000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	7934000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	1318000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	16854000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	31695000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	8052000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.01
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.11
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.05
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.05

Files In Submission

Name	View Source	Status
0000866829-21-000007-index-headers.html	Edgar Link	pending
0000866829-21-000007-index.html	Edgar Link	pending
0000866829-21-000007.txt	Edgar Link	pending
0000866829-21-000007-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
hlx-20201231.htm	Edgar Link	pending
hlx-20201231.xsd	Edgar Link	pending
hlx-20201231_cal.xml	Edgar Link	unprocessable
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hlx-20201231_htm.xml	Edgar Link	completed
hlx-20201231_lab.xml	Edgar Link	unprocessable
hlx-20201231_pre.xml	Edgar Link	unprocessable
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$HLX
HELIX ENERGY SOLUTIONS GROUP INC Stock $hlx

2020 Q4 Form 10-K Financial Statement

#000086682921000007 Filed on February 25, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HLX HELIX ENERGY SOLUTIONS GROUP INC Stock $hlx

2020 Q4 Form 10-K Financial Statement

#000086682921000007 Filed on February 25, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HLX
HELIX ENERGY SOLUTIONS GROUP INC Stock $hlx