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Employee Benefit Plans (Narrative) (Details) (USD $) | 12 Months Ended | 120 Months Ended | 1 Months Ended | 12 Months Ended | 36 Months Ended | 1 Months Ended
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Dec. 31, 2014 ShareBasedCompensationPlan | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2014 | Jan. 31, 2014 | Dec. 31, 2011 | Dec. 31, 2014 | Jan. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Number of stock plans | 1 hlx_NumberOfStockPlans |  |  |  |  |  |  |
Additional shares authorized | 4,300,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized |  |  |  |  |  |  |
Shares available for grant | 6,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |  |  | 6,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |  |  | 6,200,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant |
Share-based payment award other than options, grants in period | 139,455 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 168,468 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod | 349,430 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod |  |  |  |  |
Forfeiture on restricted stock percentage | 8.00%hlx_ForfeituresOnRestrictedStockPercentage |  |  |  |  |  |  |
Forfeiture on restricted stock period |  | 5 years |  |  |  |  |  |
Compensation cost related to restricted stock, PSUs and RSUs | $ 10,400,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 | $ 8,800,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 | $ 7,700,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardCompensationCost1 |  |  |  |  |
Performance share units granted | 73,609 hlx_PerformanceShareUnitsGranted | 89,329 hlx_PerformanceShareUnitsGranted | 132,910 hlx_PerformanceShareUnitsGranted |  |  |  |  |
Performance share unit market value | $ 26.79 hlx_PerformanceShareUnitMarketValue | $ 27.50 hlx_PerformanceShareUnitMarketValue | $ 23.68 hlx_PerformanceShareUnitMarketValue | $ 26.79 hlx_PerformanceShareUnitMarketValue |  |  | 26.79 hlx_PerformanceShareUnitMarketValue |
Stock option grants | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |  | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross |  |  |  |
Options, outstanding, number |  | 0 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  |  |  | 192,800 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber |  |
Options, outstanding, weighted average exercise price |  |  |  |  |  | 10.52 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice |  |
Options, exercises in period |  | 52,800 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 140,000 us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |  |  |  |  |
Options, exercisable, weighted average exercise price |  | $ 13.91 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice | $ 9.24 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice |  |  |  |  |
Options, exercises in period, total intrinsic value |  | 500,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 1,300,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |  |  |  |  |
Options, exercisable, intrinsic value |  |  | 400,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 |  |  |  |  |
Deferred compensation arrangement, cash awards granted, amount | 8,900,000 us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount | 8,400,000 us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount | 4,200,000 us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount | 8,900,000 us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount |  |  | 8,900,000 us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount |
Deferred compensation arrangement, compensation expense | 7,200,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense | 9,100,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense | 8,700,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense |  |  |  |  |
Deferred compensation cash-based arrangement, liability | 12,800,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent | 14,800,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent |  | 12,800,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent |  |  | 12,800,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent |
Deferred compensation arrangement with individual, distributions paid | 9,200,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid | 7,100,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid | 5,500,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid | 9,200,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid |  |  | 9,200,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Deferred compensation arrangement, cash awards granted, amount |  |  |  |  |  |  |  | 0 us-gaap_DeferredCompensationArrangementWithIndividualCashAwardGrantedAmount / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Deferred compensation arrangement with individual, distributions paid |  |  |  |  |  |  |  | 8,900,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
401K Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Maximum employer subscription rate | 75.00%hlx_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployerSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember | 50.00%hlx_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployerSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember |  |  |  |  |  |
Maximum employee subscription rate | 5.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember |  |  | 5.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember |  |  | 5.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember |
401k plan cost | 2,200,000 us-gaap_DefinedContributionPlanCostRecognized / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember | 1,700,000 us-gaap_DefinedContributionPlanCostRecognized / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember | 1,600,000 us-gaap_DefinedContributionPlanCostRecognized / us-gaap_AwardTypeAxis = us-gaap_UnitedStatesPostretirementBenefitPlansOfUSEntityDefinedBenefitMember |  |  |  |  |
E S P P [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Stock authorized shares employee stock purchase plan | 1,500,000 hlx_StockAuthorizedSharesEmployeeStockPurchasePlans / us-gaap_AwardTypeAxis = hlx_ESPPMember |  |  |  |  |  |  |
Available shares employee stock purchase plan | 1,200,000 hlx_AvailableSharesEmployeeStockPurchasePlan / us-gaap_AwardTypeAxis = hlx_ESPPMember |  |  |  |  |  |  |
Percentage of share of non vested stock considered as call option | 85.00%hlx_PercentageOfShareOfNonVestedStockConsideredAsCallOption / us-gaap_AwardTypeAxis = hlx_ESPPMember |  |  | 85.00%hlx_PercentageOfShareOfNonVestedStockConsideredAsCallOption / us-gaap_AwardTypeAxis = hlx_ESPPMember |  |  | 85.00%hlx_PercentageOfShareOfNonVestedStockConsideredAsCallOption / us-gaap_AwardTypeAxis = hlx_ESPPMember |
Percentage of share of non-vested stock considered as put-option | 15.00%hlx_PercentageOfShareOfNonVestedStockConsideredAsPutOption / us-gaap_AwardTypeAxis = hlx_ESPPMember |  |  |  |  |  |  |
Allocated share-based compensation expense | 1,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = hlx_ESPPMember | 800,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_AwardTypeAxis = hlx_ESPPMember |  |  |  |  |  |
2005 Incentive Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment award, vesting percentage |  |  |  |  |  | 20.00%hlx_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member | 33.00%hlx_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member |
Share-based payment award, vesting period, in years | 3 years | 3 years | 3 years |  | 3 years | 5 years |  |
2005 Incentive Plan [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment award, vesting percentage |  |  |  |  |  |  |  | 33.00%hlx_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Share-based payment award other than options, grants in period |  |  |  |  |  |  |  | 293,029 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Share-based payment award, market value per share |  |  |  |  |  |  |  | $ 21.67 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Share-based compensation, nonvested awards, total compensation cost not yet recognized |  |  |  |  |  |  |  | 6,300,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Performance share units granted |  |  |  |  |  |  |  | 293,029 hlx_PerformanceShareUnitsGranted / us-gaap_AwardTypeAxis = hlx_IncentivePlan2005Member / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Share-based payment award, vesting period, in years |  |  |  |  |  |  |  | 3 years
Restricted Stock Units RSU And Restricted Stock Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based compensation, nonvested awards, total compensation cost not yet recognized | 5,700,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = hlx_RestrictedStockUnitsRsuAndRestrictedStockSharesMember | 7,500,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = hlx_RestrictedStockUnitsRsuAndRestrictedStockSharesMember | 11,200,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = hlx_RestrictedStockUnitsRsuAndRestrictedStockSharesMember | 5,700,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = hlx_RestrictedStockUnitsRsuAndRestrictedStockSharesMember |  |  | 5,700,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized / us-gaap_AwardTypeAxis = hlx_RestrictedStockUnitsRsuAndRestrictedStockSharesMember |
Share-based payment award, outstanding, weighted average remaining contractual terms | 1 year 2 months 12 days |  |  |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share-based payment award, vesting percentage | 100.00%hlx_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  |  |  |  |  |
Deferred compensation liability | 7,900,000 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  | 7,900,000 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  | 7,900,000 us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |
Share-based payment award, plan modification, incremental compensation cost | 3,300,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember |  |  |  |  |  |  |
Share-based payment award, vesting period, in years | 3 years |  |  |  |  |  |  |
Performance Shares [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Deferred compensation arrangement with individual, distributions paid |  |  |  |  |  |  |  | 4,500,000 us-gaap_DeferredCompensationArrangementWithIndividualDistributionsPaid / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Long-Term Incentive Cash Plan 2009 Grants [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Minimum percentage of average price during measurement period |  | 75.00%hlx_MinimumPercentageOfAveragePriceDuringMeasurementPeriod / us-gaap_AwardTypeAxis = hlx_LongTermIncentiveCashPlan2009GrantsMember |  |  |  |  |  |
Executive Officer [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Deferred compensation arrangement, compensation expense | 3,600,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember | 5,300,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember | 7,300,000 us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  |  |  |
Deferred compensation cash-based arrangement, liability | $ 7,900,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember | $ 11,100,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  | $ 7,900,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |  |  | 7,900,000 us-gaap_DeferredCompensationCashbasedArrangementsLiabilityCurrentAndNoncurrent / us-gaap_TitleOfIndividualAxis = us-gaap_ExecutiveOfficerMember |
Maximum Shares As Incentive Options Member |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Shares available for grant | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis = hlx_MaximumSharesAsIncentiveOptionsMember |  |  | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis = hlx_MaximumSharesAsIncentiveOptionsMember |  |  | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis = hlx_MaximumSharesAsIncentiveOptionsMember |
Maximum [Member] | Performance Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award percentage | 200.00%hlx_ShareBasedCompensationMaximumAwardPercentage / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |  |  |  |
Minimum [Member] | Performance Shares [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Award percentage | 0.00%hlx_ShareBasedCompensationMaximumAwardPercentage / us-gaap_AwardTypeAxis = us-gaap_PerformanceSharesMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |  |  |  |

X
- Definition Number of shares available for issuance under the plan. + References No definition available. + Details
Name: | hlx_AvailableSharesEmployeeStockPurchasePlan
Namespace Prefix: | hlx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The average period in which the forfeiture percentage is calculated. + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Forfeiture percentage of restricted stock + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Minimum percentage of average price during measurement period. + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of stock-based compensation plans. + References No definition available. + Details
Name: | hlx_NumberOfStockPlans
Namespace Prefix: | hlx_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of share of non-vested stock considered as call-option. + References No definition available. + Details
Name: | hlx_PercentageOfShareOfNonVestedStockConsideredAsCallOption
Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of share of non-vested stock considered as put-option. + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Fair value of performance share units on grant date as determined using Monte Carlo simulation model. + References No definition available. + Details
Name: | hlx_PerformanceShareUnitMarketValue
Namespace Prefix: | hlx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of performance share units granted + References No definition available. + Details
Name: | hlx_PerformanceShareUnitsGranted
Namespace Prefix: | hlx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The highest percentage match of employees contribution to the plan. + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Share based compensation, maximum award percentage + References No definition available. + Details
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Namespace Prefix: | hlx_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares authorized for issuance as a result of an employee stock purchase plan. + References No definition available. + Details
Name: | hlx_StockAuthorizedSharesEmployeeStockPurchasePlans
Namespace Prefix: | hlx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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Balance Type: | debit
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- Definition Amount of commitment made to pay deferred cash remuneration. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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Namespace Prefix: | us-gaap_
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- Definition The amount of distributions made to the individual during the period. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | debit
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for deferred compensation arrangements. Represents currently earned compensation under cash arrangements (such as a profit-sharing plan, rabbi trust, and employee contract--excluding equity-based arrangements) that is not actually paid until a later date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of capitalized and expensed compensation cost from equity-based compensation arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 + Details
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- Definition An excess of the fair value of the modified award over the fair value of the award immediately before the modification. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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