v3.26.1

Commitments and Contingencies and Other Matters (Details)	1 Months Ended
	Jan. 31, 2026
Patriot
Commitments And Contingencies [Line Items]
Term of charter agreement	4 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

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

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=hlx_PatriotMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: