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Description of Business	12 Months Ended
	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Through our subsidiaries and joint ventures, we stand among the world's leading professional services firms, offering EPC and project management services. We provide these services to our clients in diverse industries worldwide including life sciences, advanced technologies and manufacturing, data centers, mining and metals, gas and nuclear derived power, infrastructure, chemicals, LNG, and oil and gas production and fuels. We are also a service provider to the U.S. federal government and governments abroad. Our operations are organized into 3 principal segments: Urban Solutions, Energy Solutions and Mission Solutions. Additional activities are reported under our Other segment. Urban Solutions provides EPC and project management services to the advanced technologies and manufacturing, life sciences, mining and metals, infrastructure industries and via professional staffing services. This segment also includes our operations and maintenance business. Energy Solutions offers 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, green chemicals and hydrogen. Mission Solutions delivers advanced technical services to the U.S. and other governments. This segment works with the DOE and the National Nuclear Security Administration, the DOD, FEMA and intelligence agencies. The segment also provides services to commercial nuclear clients.

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- Definition

The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483426/235-10-50-4

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 205
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/205/tableOfContent

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- References

No definition available.

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