XML 45 R35.htm IDEA: XBRL DOCUMENT
v3.22.1

Company Overview (Details) | 3 Months Ended
--- | ---
Mar. 31, 2022 segment item
Segment Reporting Information [Line Items] |
Number of reportable segments | segment | 3
Well Intervention |
Segment Reporting Information [Line Items] |
Number of long-term chartered vessels | item | 2

X
- Definition Number Of Long Term Chartered Vessels + References No definition available. + Details
Name: | hlx_NumberOfLongTermCharteredVessels
Namespace Prefix: | hlx_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hlx_WellInterventionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |