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Business Segment Information
 3 Months Ended
Apr. 03, 2026
Segment Reporting [Abstract]  
Business Segment Information Business Segment Information
We provide a wide range of professional services, and the management of our business is heavily focused on major projects or programs within each of our reportable segments. At any given time, government programs and joint ventures represent a substantial part of our operations. Effective for fiscal 2026, a portion of a business unit within our Mission Technology Solutions segment became part of our Sustainable Technology Solutions segment. All information in this Quarterly Report on Form 10-Q is presented in accordance with the realigned reportable segments and all prior period information was recast to reflect the realigned reportable segments. We are organized into two core business segments, Mission Technology Solutions and Sustainable Technology Solutions and one non-core business segment as described below:

Mission Technology Solutions. Our Mission Technology Solutions business segment provides full life-cycle support solutions to defense, intelligence, space, aviation and other programs and missions for military and other government agencies primarily in the U.S., U.K. and Australia. KBR's full-spectrum solutions span research and development, advanced prototyping, acquisition support, systems engineering, C5ISR, cyber analytics, space domain awareness, test and evaluation, data analytics and integration, systems integration and program management, global supply chain management, operations readiness and support and professional advisory services across the defense, energy security and transition and critical infrastructure sectors. The disposal of HomeSafe is reported as discontinued operations and the operations are excluded from Mission Technology Solutions results reflected within our tables below. See Note 17. “Discontinued Operations” for additional information regarding the HomeSafe disposal.

Sustainable Technology Solutions. Our Sustainable Technology Solutions business segment is anchored by our portfolio of over 85 innovative, proprietary, sustainability-focused process technologies that reduce emissions, increase efficiency and/or accelerate and enable energy transition across the industrial base in four primary verticals: ammonia/syngas, chemical/petrochemicals, clean refining and circular process/circular economy solutions. STS also provides highly synergistic services including advisory and consulting focused on energy security, broad-based emission solutions, high-end engineering, infrastructure, design and program management centered around decarbonization, energy efficiency, environmental impact and asset optimization, as well as our digitally-enabled operating and monitoring solutions. Through early planning and scope definition, advanced technologies and facility life-cycle optimization, our STS business segment works closely with customers to provide what we believe is the optimal approach to maximize their return on investment. Included in Sustainable Technology Solutions is the business of Infrastar Limited acquired on May 17, 2025. See Note 16. "Acquisition" to our condensed consolidated financial statements for additional information on this acquisition.

Corporate. Our non-core segment includes corporate expenses and selling, general and administrative expenses not allocated to the business segments above.
In its operation of our business, our management, including our chief operating decision maker ("CODM"), evaluates the performance of our business segments based on operating income. Our CODM, who is our chief executive officer, utilizes operating income to evaluate segment results and is a factor considered in determining capital allocation among the segments. Our CODM analyzes selected segment balance sheet information for our business segments and for the Company as a whole. Information on each of our business segments and reconciliation to net income (loss) attributable to KBR from continuing operations within our condensed consolidated statements of operations is presented in the tables below.
Operations by Reportable Segment
Three months ended April 3, 2026
Dollars in millionsMTSSTSCorporateTotal
Revenues$1,296 $627 $— $1,923 
Cost of revenues(1,127)(531)— (1,658)
Gross profit169 96 — 265 
Equity in earnings of unconsolidated affiliates10 41 — 51 
Selling, general and administrative expenses(67)(23)(43)(133)
Other(1)(1)(1)(3)
Operating income (loss)111 113 (44)180 
Interest expense— — (37)(37)
Income (loss) from continuing operations before income taxes111 113 (81)143 
Provision for income taxes— — (40)(40)
Net income (loss) from continuing operations111 113 (121)103 
Net income (loss) attributable to KBR from continuing operations$111 $113 $(121)$103 
Supplemental Disclosures:
Depreciation and amortization$25 $10 $6 $41 
Purchases of property, plant, and equipment$(7)$(1)$(4)$(12)
Total assets as of April 3, 2026$3,780 $1,908 $937 $6,625 
Three months ended April 4, 2025
Dollars in millionsMTSSTSCorporateTotal
Revenues$1,381 $637 $— $2,018 
Cost of revenues(1,212)(506)— (1,718)
Gross profit169 131 — 300 
Equity in earnings of unconsolidated affiliates7 35 — 42 
Selling, general and administrative expenses(64)(39)(37)(140)
Other1 — (1)— 
Operating income (loss)113 127 (38)202 
Interest expense— — (41)(41)
Other non-operating income (expense)(1)— 4 3 
Income (loss) from continuing operations before income taxes112 127 (75)164 
Provision for income taxes— — (43)(43)
Net income (loss) from continuing operations112 127 (118)121 
Less: Net income attributable to noncontrolling interests included in continuing operations— 1 — 1 
Net income (loss) attributable to KBR from continuing operations$112 $126 $(118)$120 
Supplemental Disclosures:
Depreciation and amortization$26 $9 $6 $41 
Purchases of property, plant, and equipment$— $— $(2)$(2)
Total assets as of January 2, 2026$3,848 $1,769 $967 $6,584