XML 44 R33.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Company Overview (Details) |  | 3 Months Ended
--- | --- | ---
Feb. 01, 2017 | Mar. 31, 2017 segment vessel
Segment Reporting Information [Line Items] |  |
Number of reportable segments | segment |  | 3
Robotics [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of chartered vessels | vessel |  | 3
HFRS [Member] | Production Facilities [Member] |  |
Segment Reporting Information [Line Items] |  |
Contract extension period | 1 year |

X
- Definition The duration period by which the contract is extended. + References No definition available. + Details
Name: | hlx_ContractExtensionPeriod
Namespace Prefix: | hlx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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 No definition available. + 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_RoboticsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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