XML 112 R98.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Commitments And Contingencies And Other Matters - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Jan. 31, 2023 | Feb. 28, 2024 | Dec. 31, 2023
Commitments And Contingencies [Line Items] |  |  |
Agreed earn-out consideration |  |  | $ 85,000
Alliance |  |  |
Commitments And Contingencies [Line Items] |  |  |
Agreed earn-out consideration |  |  | $ 85,000
Vessel Charter Commitments | Subsequent Event |  |  |
Commitments And Contingencies [Line Items] |  |  |
Increase in vessel charter commitments |  | $ 559,600 |
Glomar Wave |  |  |
Commitments And Contingencies [Line Items] |  |  |
Term of charter agreement | 3 years |  |

X
- Definition Commitments And Contingencies [Line Items] + References No definition available. + Details
Name: | hlx_CommitmentsAndContingenciesLineItems
Namespace Prefix: | hlx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase in commitments for chartered vessels. + References No definition available. + Details
Name: | hlx_IncreaseInVesselCharterCommitments
Namespace Prefix: | hlx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Term of charter agreement in years. + References No definition available. + Details
Name: | hlx_TermOfCharterAgreement
Namespace Prefix: | hlx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination, expected to be settled within one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479668/805-30-25-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 35 -Paragraph 1 -Subparagraph b -SubTopic 30 -Topic 805 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479613/805-30-35-1 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=hlx_AllianceGroupOfCompaniesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=hlx_VesselCharterCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=hlx_GlomarWaveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |