    <SEC-DOCUMENT>0001357615-24-000048-index.html : 20240819
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    <ACCEPTANCE-DATETIME>20240819171724
    ACCESSION NUMBER:		0001357615-24-000048
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		15
    CONFORMED PERIOD OF REPORT:	20240814
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20240819
    DATE AS OF CHANGE:		20240819

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			KBR, INC.
    		CENTRAL INDEX KEY:			0001357615
    		STANDARD INDUSTRIAL CLASSIFICATION:	HEAVY CONSTRUCTION OTHER THAN BUILDING CONST - CONTRACTORS [1600]
    		ORGANIZATION NAME:           	05 Real Estate & Construction
    		IRS NUMBER:				204536774
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			0103

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-33146
    		FILM NUMBER:		241221664

    	BUSINESS ADDRESS:
    		STREET 1:		601 JEFFERSON STREET
    		STREET 2:		SUITE 3400
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77002
    		BUSINESS PHONE:		(713) 753-2000

    	MAIL ADDRESS:
    		STREET 1:		601 JEFFERSON STREET
    		STREET 2:		SUITE 3400
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77002
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>kbr-20240814.htm
    <DESCRIPTION>CURRENT REPORT
    <TEXT>
    Document 1 - file: kbr-20240814.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>2
    <FILENAME>exhibit10-108142024.htm
    <DESCRIPTION>EX-10.1
    <TEXT>
    Document 2 - file: exhibit10-108142024.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>kbr-20240814.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: kbr-20240814.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>kbr-20240814_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: kbr-20240814_lab.xml

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    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>kbr-20240814_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: kbr-20240814_pre.xml

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>kbr-20240814_g1.jpg
    <DESCRIPTION>KBR LOGO
    <TEXT>
    Document 6 - file: kbr-20240814_g1.jpg

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>8
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 8 - file: R1.htm

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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>9
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 9 - file: Financial_Report.xlsx

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>10
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 10 - file: Show.js

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: report.css

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: FilingSummary.html

    Document 13 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>15
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>16
    <FILENAME>0001357615-24-000048-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 16 - file: 0001357615-24-000048-xbrl.zip

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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>kbr-20240814_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 17 - file: kbr-20240814_htm.html

    Document 17 - RAW XML: kbr-20240814_htm.xml

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