Leidos Holdings, Inc. is a holding company, which operates through its wholly owned subsidiary, Leidos, Inc. (Leidos). The Company's segments include National Security & Digital, Health & Civil, Commercial & International and Defense Systems. Its National Security & Digital business provides technologically advanced services, solutions and products, as well as mission software capabilities for defense and intelligence customers in the areas of cyber, logistics, security operations and decision analytics. Its Health & Civil business provides services and solutions to federal and commercial customers in the areas of public health, care coordination, life and environmental sciences and transportation. Its Commercial & International business delivers a portfolio of products, services, and solutions aimed at securing national assets, modernizing energy and critical infrastructure, and enhancing mission outcomes. The Company serves government and commercial customers.