Commitments And Contingencies And Other Matters	12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments And Contingencies And Other Matters	Note 16 — Commitments and Contingencies and Other Matters Commitments Our Well Intervention segment has long-term charter agreements with Siem Offshore AS for the Siem Helix 1 and Siem Helix 2 vessels expiring in February 2025 and February 2027, respectively, with options to extend. Our Robotics segment has vessel charters for the Grand Canyon II, the Grand Canyon III, the Shelia Bordelon, the Glomar Wave and the Horizon Enabler. Our time charter agreements for the Grand Canyon II and Grand Canyon III vessels expire in December 2027 and May 2028, respectively, with options to renew the Grand Canyon III. In January 2023, we entered into a three-year charter agreement for the Glomar Wave in the North Sea with options to extend. In July 2023, we entered into a new agreement to extend the Horizon Enabler charter until December 2025, with further options to extend. In January 2024, the expiration date of our time charter agreement for the Shelia Bordelon in the Gulf of Mexico was extended from June 2024 to June 2026. In February 2024, we extended the vessel charters for the Siem Helix 1 until December 2030 and for the Siem Helix 2 until December 2031. These subsequent extensions increased our vessel charter commitments by $559.6 million. Contingencies and Claims From time to time, we may incur losses related to our contracts for matters such as costs in excess of contract consideration or claims related to disputes with customers and any obligations thereon. While we believe we maintain appropriate accruals for such matters, the actual loss to us may be more or less than the amounts reserved. During the fourth quarter 2023, we finalized the calculation and agreed with the seller in the Alliance transaction on an $85.0 million earn-out expected to be paid in cash in April 2024 (Note 3). Consequently, any uncertainty related to this liability has been resolved as the payment amount was fixed and the measurement period ended on December 31, 2023. We are involved in various legal proceedings in the normal course of business, including claims under the General Maritime Laws of the United States and the Merchant Marine Act of 1920 (commonly referred to as the Jones Act), contract-related disputes, employee-related disputes and subsequently identified legacy issues related to Alliance. We recognize losses for lawsuits when the probability of an unfavorable outcome is probable and we can reasonably estimate the amount of the loss. For insured claims, we recognize such losses to the extent they exceed applicable insurance coverage. Although we can give no assurance about the outcome of litigation, claims or other proceedings, we do not currently believe that any loss resulting from litigation, claims or other proceedings, to the extent not otherwise covered by insurance, will have a material adverse impact on our consolidated financial statements.

Commitments And Contingencies And Other Matters

12 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies And Other Matters

Note 16 — Commitments and Contingencies and Other Matters

Commitments

Our Well Intervention segment has long-term charter agreements with Siem Offshore AS for the Siem Helix 1 and Siem Helix 2 vessels expiring in February 2025 and February 2027, respectively, with options to extend. Our Robotics segment has vessel charters for the Grand Canyon II, the Grand Canyon III, the Shelia Bordelon, the Glomar Wave and the Horizon Enabler. Our time charter agreements for the Grand Canyon II and Grand Canyon III vessels expire in December 2027 and May 2028, respectively, with options to renew the Grand Canyon III. In January 2023, we entered into a three-year charter agreement for the Glomar Wave in the North Sea with options to extend. In July 2023, we entered into a new agreement to extend the Horizon Enabler charter until December 2025, with further options to extend.

In January 2024, the expiration date of our time charter agreement for the Shelia Bordelon in the Gulf of Mexico was extended from June 2024 to June 2026. In February 2024, we extended the vessel charters for the Siem Helix 1 until December 2030 and for the Siem Helix 2 until December 2031. These subsequent extensions increased our vessel charter commitments by $559.6 million.

Contingencies and Claims

From time to time, we may incur losses related to our contracts for matters such as costs in excess of contract consideration or claims related to disputes with customers and any obligations thereon. While we believe we maintain appropriate accruals for such matters, the actual loss to us may be more or less than the amounts reserved.

During the fourth quarter 2023, we finalized the calculation and agreed with the seller in the Alliance transaction on an $85.0 million earn-out expected to be paid in cash in April 2024 (Note 3). Consequently, any uncertainty related to this liability has been resolved as the payment amount was fixed and the measurement period ended on December 31, 2023.

We are involved in various legal proceedings in the normal course of business, including claims under the General Maritime Laws of the United States and the Merchant Marine Act of 1920 (commonly referred to as the Jones Act), contract-related disputes, employee-related disputes and subsequently identified legacy issues related to Alliance. We recognize losses for lawsuits when the probability of an unfavorable outcome is probable and we can reasonably estimate the amount of the loss. For insured claims, we recognize such losses to the extent they exceed applicable insurance coverage. Although we can give no assurance about the outcome of litigation, claims or other proceedings, we do not currently believe that any loss resulting from litigation, claims or other proceedings, to the extent not otherwise covered by insurance, will have a material adverse impact on our consolidated financial statements.