NATURE OF OPERATIONS AND ORGANIZATION	6 Months Ended
Jun. 30, 2019
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”) and technology solutions to the energy industry. We design and build end-to-end infrastructure and technology 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 Our business is organized into five operating groups, which represent our reportable segments consisting of: North, Central and South America (“NCSA”); Europe, Africa, Russia and Caspian (“EARC”); the Middle East and North Africa (“MENA”); Asia Pacific (“APAC”); and Technology. See Note 23, Segment Reporting, for further discussion. In the second quarter of 2019, we sold Alloy Piping Products LLC (“APP”), the distribution and manufacturing arm of our pipe fabrication business, previously included in our NCSA segment. See Note 4, Disposition of Alloy Piping Products, LLC, for further discussion.

NATURE OF OPERATIONS AND ORGANIZATION

6 Months Ended

Jun. 30, 2019

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”) and technology solutions to the energy industry. We design and build end-to-end infrastructure and technology 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

Our business is organized into five operating groups, which represent our reportable segments consisting of: North, Central and South America (“NCSA”); Europe, Africa, Russia and Caspian (“EARC”); the Middle East and North Africa (“MENA”); Asia Pacific (“APAC”); and Technology. See Note 23, Segment Reporting, for further discussion. In the second quarter of 2019, we sold Alloy Piping Products LLC (“APP”), the distribution and manufacturing arm of our pipe fabrication business, previously included in our NCSA segment. See Note 4, Disposition of Alloy Piping Products, LLC, for further discussion.