NATURE OF OPERATIONS AND ORGANIZATION	3 Months Ended
Mar. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
NATURE OF OPERATIONS AND ORGANIZATION	NOTE 1—NATURE OF OPERATIONS AND ORGANIZATION Nature of Operations McDermott International, Inc. (“McDermott,” “we” or “us”), a corporation incorporated under the laws of the Republic of Panama in 1959, is a fully integrated provider of engineering, procurement, construction and installation (“EPCI”) solutions to the energy industry. We design and build end-to-end infrastructure solutions to transport and transform oil and gas into a variety of products. Our proprietary technologies, integrated expertise and comprehensive solutions are utilized for offshore, subsea, power, liquefied natural gas (“LNG”) and downstream energy projects around the world. Our customers include national, major integrated and other oil and gas companies as well as producers of petrochemicals and electric power, and we operate in most major energy-producing regions throughout the world. We execute our contracts through a variety of methods, principally fixed-price, but also including cost-reimbursable, cost-plus, day-rate and unit-rate basis or some combination of those methods. Organization On May 10, 2018, we completed our business combination with Chicago Bridge & Iron Company N.V. (“CB&I”) through a series of transactions (the “Combination”). Following completion of the Combination, during the second quarter of 2018, we reorganized our operations into five business segments, which represented our reporting segments and were: North, Central and South America (“NCSA”); Europe, Africa, Russia and Caspian (“EARC”); the Middle East and North Africa (“MENA”); Asia Pacific (“APAC”); and Technology. In 2019, we performed a review of our business portfolio, which included businesses acquired in the Combination. Our review sought to determine if any portions of our business were non-core for purposes of our vertically integrated offering model. This review initially identified our pipe fabrication and industrial storage tank businesses as non-core. We completed the sale of Alloy Piping Products (“APP”), a portion of the pipe fabrication business, during the second quarter of 2019 and we are continuing to pursue the sale of the remaining portion of the pipe fabrication business. In the third quarter of 2019, we terminated the previously announced sale process for our industrial storage tank business, as we concluded that the net cash proceeds from the sale, if completed, would likely be significantly below initial expectations. As a result of our decision to retain this business, starting January 1, 2020, we changed the structure of our internal organization and formed a new reporting segment for our industrial storage tank business (“Storage Solutions”). We now report financial results under five operating groups, which represent our reporting segments consisting of: NCSA; EARC; MENA; APAC; and Storage Solutions. As further discussed in Note 2, Basis of Presentation, and Note 4, Discontinued Operations, our former Technology reporting segment has been classified as a discontinued operation, as the anticipated sale represents a strategic shift and will have a material effect on our operations and financial results. Previously reported financial information has been adjusted to reflect the above changes. See Note 22, Segment Reporting, for further discussion. Recent Developments Affecting Industry Conditions and Our Business On March 11, 2020, the World Health Organization declared the ongoing coronavirus (COVID-19) outbreak a pandemic and recommended containment and mitigation measures worldwide. The pandemic has reached more than 200 countries and has resulted in widespread adverse impacts on the global economy and financial markets, and on our employees, customers, subcontractors, suppliers and other parties with whom we have business relations. We have experienced some resulting disruptions to our business operations, as the pandemic has continued to spread through most of our markets, including negative impact on our ongoing projects and the expected detrimental impacts on awards of new projects by our customers. We cannot predict the full impact that COVID-19 or the significant disruption and volatility currently being experienced in the oil and natural gas markets will have on our business, cash flows, liquidity, financial condition and results of operations at this time, due to numerous uncertainties. The ultimate impacts will depend on future developments beyond our control, which are highly uncertain and cannot be predicted, including, among others, the ultimate geographic spread of the virus, the consequences of governmental and other measures designed to prevent the spread of the virus, the development of effective treatments, the duration of the outbreak, actions taken by members of OPEC and other foreign, oil-exporting countries, governmental authorities, customers, subcontractors, suppliers and other third parties, workforce availability, and the timing and extent to which normal economic and operating conditions resume. For additional discussion regarding the impacts of the COVID-19 Pandemic and risks associated with the COVID-19 pandemic, see Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Item 1A “Risk Factors” in this report.

NATURE OF OPERATIONS AND ORGANIZATION

3 Months Ended

Mar. 31, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

NOTE 1—NATURE OF OPERATIONS AND ORGANIZATION

Nature of Operations

McDermott International, Inc. (“McDermott,” “we” or “us”), a corporation incorporated under the laws of the Republic of Panama in 1959, is a fully integrated provider of engineering, procurement, construction and installation (“EPCI”) solutions to the energy industry. We design and build end-to-end infrastructure solutions to transport and transform oil and gas into a variety of products. Our proprietary technologies, integrated expertise and comprehensive solutions are utilized for offshore, subsea, power, liquefied natural gas (“LNG”) and downstream energy projects around the world. Our customers include national, major integrated and other oil and gas companies as well as producers of petrochemicals and electric power, and we operate in most major energy-producing regions throughout the world. We execute our contracts through a variety of methods, principally fixed-price, but also including cost-reimbursable, cost-plus, day-rate and unit-rate basis or some combination of those methods.

Organization

On May 10, 2018, we completed our business combination with Chicago Bridge & Iron Company N.V. (“CB&I”) through a series of transactions (the “Combination”). Following completion of the Combination, during the second quarter of 2018, we reorganized our operations into five business segments, which represented our reporting segments and were: North, Central and South America (“NCSA”); Europe, Africa, Russia and Caspian (“EARC”); the Middle East and North Africa (“MENA”); Asia Pacific (“APAC”); and Technology.

In 2019, we performed a review of our business portfolio, which included businesses acquired in the Combination. Our review sought to determine if any portions of our business were non-core for purposes of our vertically integrated offering model. This review initially identified our pipe fabrication and industrial storage tank businesses as non-core. We completed the sale of Alloy Piping Products (“APP”), a portion of the pipe fabrication business, during the second quarter of 2019 and we are continuing to pursue the sale of the remaining portion of the pipe fabrication business. In the third quarter of 2019, we terminated the previously announced sale process for our industrial storage tank business, as we concluded that the net cash proceeds from the sale, if completed, would likely be significantly below initial expectations. As a result of our decision to retain this business, starting January 1, 2020, we changed the structure of our internal organization and formed a new reporting segment for our industrial storage tank business (“Storage Solutions”).

We now report financial results under five operating groups, which represent our reporting segments consisting of: NCSA; EARC; MENA; APAC; and Storage Solutions. As further discussed in Note 2, Basis of Presentation, and Note 4, Discontinued Operations, our former Technology reporting segment has been classified as a discontinued operation, as the anticipated sale represents a strategic shift and will have a material effect on our operations and financial results.

Previously reported financial information has been adjusted to reflect the above changes. See Note 22, Segment Reporting, for further discussion.

Recent Developments Affecting Industry Conditions and Our Business

On March 11, 2020, the World Health Organization declared the ongoing coronavirus (COVID-19) outbreak a pandemic and recommended containment and mitigation measures worldwide. The pandemic has reached more than 200 countries and has resulted in widespread adverse impacts on the global economy and financial markets, and on our employees, customers, subcontractors, suppliers and other parties with whom we have business relations. We have experienced some resulting disruptions to our business operations, as the pandemic has continued to spread through most of our markets, including negative impact on our ongoing projects and the expected detrimental impacts on awards of new projects by our customers. We cannot predict the full impact that COVID-19 or the significant disruption and volatility currently being experienced in the oil and natural gas markets will have on our business, cash flows, liquidity, financial condition and results of operations at this time, due to numerous uncertainties. The ultimate impacts will depend on future developments beyond our control, which are highly uncertain and cannot be predicted, including, among others, the ultimate geographic spread of the virus, the consequences of governmental and other measures designed to prevent the spread of the virus, the development of effective treatments, the duration of the outbreak, actions taken by members of OPEC and other foreign, oil-exporting countries, governmental authorities, customers, subcontractors, suppliers and other third parties, workforce availability, and the timing and extent to which normal economic and operating conditions resume. For additional discussion regarding the impacts of the COVID-19 Pandemic and risks associated with the COVID-19 pandemic, see Item 2 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Item 1A “Risk Factors” in this report.