Description of Business	12 Months Ended
Description of Business	Dec. 31, 2021
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, as well as interests in joint ventures. Acting through these entities, we are one of the largest professional services firms providing EPC, fabrication and modularization, and project management services, on a global basis. We provide these services to our clients in a diverse set of industries worldwide including production and fuels, chemicals, LNG, nuclear project services, infrastructure, advanced technologies, life sciences and mining and metals. We are also a service provider to the U.S. federal government and governments abroad. During the first quarter of 2021, we changed the composition of our segments to implement our new strategy and to pursue opportunities in our designated markets. We now report our operating results in four segments as follows: Energy Solutions, Urban Solutions, Mission Solutions and Other. Segment operating information and assets for 2020 and 2019 have been recast to conform to these changes. Energy Solutions focuses on opportunities in the production and fuels, chemicals, LNG and nuclear project services market. The segment provides solutions to the energy transition market, including asset decarbonization, carbon capture, renewable fuels, waste-to-energy, green chemicals, hydrogen, nuclear power and other low-carbon energy sources. The segment also continues to serve the traditional oil, gas and petrochemical industries with full project life-cycle services, including expansion and modernization projects as well as sustaining capital work. Urban Solutions provides EPC and project management services to the infrastructure, advanced technologies, life sciences and mining and metals industries, as well as professional staffing services. Mission Solutions focuses on federal agencies across the U.S. government and select international opportunities. These include, among others, the DOE, the Department of Defense, the Federal Emergency Management Agency and intelligence agencies. The segment also provides services to commercial nuclear clients. Other includes only the operations of NuScale, in which we are the majority investor. NuScale is developing an SMR technology. In the first quarter of 2021, we committed to a plan to sell our Stork business, which had previously represented the majority of operations from our former diversified services segment. The sale of the North American portion of the AMECO equipment business was completed during May 2021. Therefore, both Stork and AMECO are reported as Disc Ops along with other immaterial operations. We expect to complete the sale of Stork and the remaining AMECO operations early in 2022. The assets and liabilities of the Stork and AMECO businesses are classified as held for sale for all periods presented. In December 2021, we announced that NuScale, in which we are the majority investor, signed a merger agreement with Spring Valley Acquisition Corp., a special purpose acquisition company ("Spring Valley"). Spring Valley is acquiring an approximately 20% interest in NuScale. The proposed transaction is anticipated to close in the first half of 2022, subject to customary closing conditions. Upon completion of the merger, we estimate that we will own approximately 60-70% of the combined company and expect that we will continue to consolidate it.