Description of Business	12 Months Ended
Description of Business	Dec. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Fluor Corporation (“we”, “us”, “our” or “the company”) is a holding company that owns many subsidiaries and interests in joint ventures. Acting through these entities, we are one of the larger global professional services firms providing EPC, fabrication and modularization, and project management services. We provide these services to our clients in diverse industries worldwide including advanced technologies and manufacturing, chemicals, infrastructure, life sciences, LNG, mining and metals, nuclear project services, energy transition, and oil and gas production and fuels. We are also a service provider to the U.S. federal government and governments abroad. We operate our business through 3 principal segments: Urban Solutions, Energy Solutions and Mission Solutions. We also have a smaller Other segment. Urban Solutions provides EPC and project management services to the advanced technologies and manufacturing, life sciences, mining and metals, infrastructure industries and professional staffing services. This segment also includes our operations and maintenance business. Energy Solutions provides EPC services for traditional oil and gas markets, including the production and fuels, chemicals, LNG and power markets. The segment serves these industries with comprehensive project life-cycle services, including expansion and modernization projects as well as in sustaining capital work. The segment also supports energy transition markets, including nuclear power and other low-carbon energy sources, asset decarbonization, carbon capture, renewable fuels, waste-to-energy, green chemicals and hydrogen. Mission Solutions provides high-end technical solutions to the U.S. and other governments. These include, among others, the DOE, the Department of Defense, FEMA and intelligence agencies. The segment also provides services to commercial nuclear clients. Our other operations include NuScale (prior to deconsolidation) and Stork. AMECO was fully divested in 2023 and we expect to complete the divestiture of Stork in 2025. In the first quarter of 2024, we completed the sale of Stork's operations in continental Europe. During April 2024, we also entered into a definitive agreement to sell Stork's U.K. operations, which we completed in the first quarter of 2025. The sale did not meet the requirements for discontinued operations as of December 31, 2024 and will not have a material impact on the financial statements. In the third quarter of 2024, we decided to close our Stork operations in Trinidad and Tobago which required us to take a $7 million severance charge. After completing the wind down of the Trinidad and Tobago operations, Stork's divestiture will be complete. NuScale has developed SMR technology that is NRC approved. Beginning in October 2024, based principally on their equity sales, we no longer met the criteria to consolidate NuScale. As a consequence, their results for all periods prior to October 2024 were consolidated, but we deconsolidated NuScale after that date and recognized a pre-tax gain of $1.6 billion in the fourth quarter of 2024, based on a stock price of $13.15 for our 126 million shares. We recognize the fair value of our investment in NuScale on a mark-to-market basis based upon the prevailing price of their stock on our balance sheet dates, which resulted in an additional pre-tax gain of $604 million for the fourth quarter of 2024. After its deconsolidation, NuScale is included in equity method earnings on our statements of operations.