Long-Term Debt - MARAD Debt (Details) - MARAD Debt (matures February 2027)	6 Months Ended
	Jun. 30, 2025
Debt Instrument [Line Items]
Guarantor obligations (as a percent)	50.00%
Frequency of periodic payment	semi-annual
Maturity date	February 2027
Interest rate (as a percent)	4.93%

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.

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HELIX ENERGY SOLUTIONS GROUP INC 10-Q