$KBR
KBR, INC. Stock $kbr

$kbr Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 8-K Financial Statement

#000135761521000124 Filed on July 29, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020 Q2
Revenue	$1.466B	$1.379B	$1.385B
YoY Change	0.96%	-3.23%	-2.6%
Cost Of Revenue	$1.300B	$1.207B	$1.243B
YoY Change	1.48%	-3.98%	-1.51%
Gross Profit	$166.0M	$172.0M	$142.0M
YoY Change	-2.92%	1.78%	-11.25%
Gross Profit Margin	11.32%	12.47%	10.25%
Selling, General & Admin	$76.00M	$89.00M	$73.00M
YoY Change	-24.0%	20.27%	-17.05%
% of Gross Profit	45.78%	51.74%	51.41%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$41.00M	$26.00M	$21.00M
YoY Change	46.43%	-7.14%	-8.7%
% of Gross Profit	24.7%	15.12%	14.79%
Operating Expenses	$76.00M	$89.00M	$73.00M
YoY Change	-24.0%	20.27%	-17.05%
Operating Profit	$45.00M	$93.00M	-$12.00M
YoY Change	-48.86%	-10.58%	-113.04%
Interest Expense	-$30.00M	$18.00M	$19.00M
YoY Change	150.0%	-28.0%	-26.92%
% of Operating Profit	-66.67%	19.35%
Other Income/Expense, Net	$7.000M	-$4.000M	-$2.000M
YoY Change	-240.0%	-233.33%	-200.0%
Pretax Income	$22.00M	$71.00M	-$33.00M
YoY Change	-63.33%	-13.41%	-148.53%
Income Tax	$2.000M	$19.00M	$6.000M
% Of Pretax Income	9.09%	26.76%
Net Earnings	$19.00M	$52.00M	-$39.00M
YoY Change	-67.24%	-7.14%	-181.25%
Net Earnings / Revenue	1.3%	3.77%	-2.82%
Basic Earnings Per Share	$0.14	$0.36	-$0.28
Diluted Earnings Per Share	$0.13	$0.36	-$0.28
COMMON SHARES
Basic Shares Outstanding	142.5M shares	142.0M shares	142.0M shares
Diluted Shares Outstanding		142.0M shares	142.0M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$436.0M	$949.0M	$635.0M
YoY Change	-38.76%	39.35%	3.93%
Cash & Equivalents	$436.0M	$949.0M	$635.0M
Short-Term Investments
Other Short-Term Assets	$121.0M	$115.0M	$125.0M
YoY Change	-17.12%	-24.84%	-5.3%
Inventory
Prepaid Expenses	$71.00M
Receivables	$1.077B	$1.143B	$1.137B
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.634B	$2.207B	$1.897B
YoY Change	-18.75%	4.75%	-4.19%
LONG-TERM ASSETS
Property, Plant & Equipment	$130.0M	$111.0M	$112.0M
YoY Change	0.0%	1.83%	-3.45%
Goodwill	$1.761B	$1.179B	$1.176B
YoY Change	39.21%	-6.5%	-6.96%
Intangibles	$683.0M	$455.0M	$456.0M
YoY Change	37.98%	-6.95%	-9.7%
Long-Term Investments	$881.0M	$825.0M	$811.0M
YoY Change	3.65%	4.04%	-0.25%
Other Assets	$135.0M	$137.0M	$140.0M
YoY Change	-5.59%	0.74%	-0.71%
Total Long-Term Assets	$4.071B	$3.101B	$3.113B
YoY Change	21.56%	-5.89%	-6.74%
TOTAL ASSETS
Total Short-Term Assets	$1.634B	$2.207B	$1.897B
Total Long-Term Assets	$4.071B	$3.101B	$3.113B
Total Assets	$5.705B	$5.308B	$5.010B
YoY Change	6.44%	-1.74%	-5.79%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$574.0M	$584.0M	$593.0M
YoY Change	0.35%	-6.41%	-2.95%
Accrued Expenses	$356.0M	$335.0M	$318.0M
YoY Change	43.55%	15.12%	13.98%
Deferred Revenue	$356.0M	$355.0M	$381.0M
YoY Change	-26.45%	-33.77%	-21.77%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$12.00M	$12.00M	$13.00M
YoY Change	-55.56%	-55.56%	-51.85%
Total Short-Term Liabilities	$1.455B	$1.433B	$1.495B
YoY Change	-3.06%	-13.26%	-4.35%
LONG-TERM LIABILITIES
Long-Term Debt	$1.584B	$1.314B	$1.065B
YoY Change	33.9%	10.89%	-10.35%
Other Long-Term Liabilities	$256.0M	$251.0M	$216.0M
YoY Change	106.45%	105.74%	77.05%
Total Long-Term Liabilities	$1.840B	$1.565B	$1.281B
YoY Change	40.78%	19.74%	-2.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.455B	$1.433B	$1.495B
Total Long-Term Liabilities	$1.840B	$1.565B	$1.281B
Total Liabilities	$4.096B	$3.595B	$3.368B
YoY Change	16.79%	0.28%	-4.43%
SHAREHOLDERS EQUITY
Retained Earnings	$1.305B	$1.300B	$1.262B
YoY Change	-9.19%	-4.83%	-4.47%
Common Stock	$0.00	$0.00	$0.00
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)	$864.0M	$817.0M	$820.0M
YoY Change	5.75%	0.0%	0.24%
Treasury Stock Shares	38.30M shares	36.49M shares	36.60M shares
Shareholders Equity	$1.580B	$1.688B	$1.615B
YoY Change
Total Liabilities & Shareholders Equity	$5.705B	$5.308B	$5.010B
YoY Change	6.44%	-1.74%	-5.79%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020 Q2
OPERATING ACTIVITIES
Net Income	$19.00M	$52.00M	-$39.00M
YoY Change	-67.24%	-7.14%	-181.25%
Depreciation, Depletion And Amortization	$41.00M	$26.00M	$21.00M
YoY Change	46.43%	-7.14%	-8.7%
Cash From Operating Activities	$122.0M	$95.00M	$109.0M
YoY Change	114.04%	-19.49%	230.3%
INVESTING ACTIVITIES
Capital Expenditures	-$12.00M	-$4.000M	-$2.000M
YoY Change	20.0%	0.0%	-50.0%
Acquisitions
YoY Change
Other Investing Activities	-$827.0M	-$9.000M	-$12.00M
YoY Change		-30.77%	-79.31%
Cash From Investing Activities	-$839.0M	-$13.00M	-$14.00M
YoY Change	8290.0%	-23.53%	-77.42%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	184.0M	224.0M	-28.00M
YoY Change	-611.11%	-1278.95%	-54.1%
NET CHANGE
Cash From Operating Activities	122.0M	95.00M	109.0M
Cash From Investing Activities	-839.0M	-13.00M	-14.00M
Cash From Financing Activities	184.0M	224.0M	-28.00M
Net Change In Cash	-533.0M	306.0M	67.00M
YoY Change	-4945.45%	273.17%	-174.44%
FREE CASH FLOW
Cash From Operating Activities	$122.0M	$95.00M	$109.0M
Capital Expenditures	-$12.00M	-$4.000M	-$2.000M
Free Cash Flow	$134.0M	$99.00M	$111.0M
YoY Change	100.0%	-18.85%	200.0%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q3	dei	Entity Central Index Key EntityCentralIndexKey	0001357615
CY2021Q3	dei	Amendment Flag AmendmentFlag	true
CY2021Q3	dei	Amendment Description AmendmentDescription	to update the historical financial information included in the Company's Annual Report on Form 10-K for the year ended December 31, 2020
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CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member
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CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1
CY2019Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesCurrent
CY2020Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesCurrent
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	us-gaap:OtherLiabilitiesNoncurrent
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2021Q3	dei	Document Type DocumentType	8-K
CY2021Q3	dei	Document Period End Date DocumentPeriodEndDate	2021-07-29
CY2021Q3	dei	Entity Registrant Name EntityRegistrantName	KBR, Inc.
CY2021Q3	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021Q3	dei	Entity File Number EntityFileNumber	001-33146
CY2021Q3	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-4536774
CY2021Q3	dei	Entity Address City Or Town EntityAddressCityOrTown	Houston,
CY2021Q3	dei	Entity Address Address Line1 EntityAddressAddressLine1	601 Jefferson Street
CY2021Q3	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 3400
CY2021Q3	dei	Entity Address State Or Province EntityAddressStateOrProvince	TX
CY2021Q3	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	77002
CY2021Q3	dei	City Area Code CityAreaCode	713
CY2021Q3	dei	Local Phone Number LocalPhoneNumber	753-2000
CY2021Q3	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value
CY2021Q3	dei	Trading Symbol TradingSymbol	KBR
CY2021Q3	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021Q3	dei	Written Communications WrittenCommunications	false
CY2021Q3	dei	Soliciting Material SolicitingMaterial	false
CY2021Q3	dei	Pre Commencement Tender Offer PreCommencementTenderOffer	false
CY2021Q3	dei	Pre Commencement Issuer Tender Offer PreCommencementIssuerTenderOffer	false
CY2021Q3	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2020Q4	us-gaap	Assets Current AssetsCurrent	1634000000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	2011000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	30000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	59000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	419000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	386000000	USD
CY2020Q4	kbr	Variable Interest Entity Property Plant And Equipment VariableInterestEntityPropertyPlantAndEquipment	24000000	USD
CY2019Q4	kbr	Variable Interest Entity Property Plant And Equipment VariableInterestEntityPropertyPlantAndEquipment	29000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	130000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	130000000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	154000000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	175000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1761000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1265000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	228000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	184000000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	683000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	495000000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	881000000	USD
CY2019Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	846000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	297000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	236000000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	135000000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	143000000	USD
CY2020Q4	us-gaap	Assets Assets	5705000000	USD
CY2019Q4	us-gaap	Assets Assets	5360000000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	574000000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	572000000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	356000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	484000000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	283000000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	209000000	USD
CY2020Q4	kbr	Current Maturities Of Non Recourse Long Term Debt CurrentMaturitiesOfNonRecourseLongTermDebt	5000000	USD
CY2019Q4	kbr	Current Maturities Of Non Recourse Long Term Debt CurrentMaturitiesOfNonRecourseLongTermDebt	11000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	44000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	39000000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	193000000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	186000000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1455000000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1501000000	USD
CY2020Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	381000000	USD
CY2019Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	277000000	USD
CY2020Q4	kbr	Noncurrent Employee Compensation And Benefits NoncurrentEmployeeCompensationAndBenefits	110000000	USD
CY2019Q4	kbr	Noncurrent Employee Compensation And Benefits NoncurrentEmployeeCompensationAndBenefits	115000000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	96000000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	92000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	26000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	16000000	USD
CY2020Q4	us-gaap	Non Recourse Debt NonRecourseDebt	2000000	USD
CY2019Q4	us-gaap	Non Recourse Debt NonRecourseDebt	7000000	USD
CY2020Q4	us-gaap	Secured Long Term Debt SecuredLongTermDebt	1584000000	USD
CY2019Q4	us-gaap	Secured Long Term Debt SecuredLongTermDebt	1183000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	186000000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	192000000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	256000000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	124000000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	4096000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	3507000000	USD
CY2020Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	179087655	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	178330201	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	140766052	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	141819148	shares
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2222000000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	2206000000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1305000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1437000000	USD
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	38321603	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	36511053	shares
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	864000000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	817000000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1083000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-987000000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1580000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1839000000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	29000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	14000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1609000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1853000000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5705000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	5360000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1197000000	USD
CY2018	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	-69000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	10000000	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	-1000000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2000000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.32
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	44000000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3000000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3000000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Convertible Debt With Conversion Feature AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature	18000000	USD
CY2018	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3000000	USD
CY2018	kbr	Other Noncontrolling Interest Activity OtherNoncontrollingInterestActivity	2000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	310000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	12000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1718000000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	12000000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	5000000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.32
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	46000000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	4000000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	3000000	USD
CY2019	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	1000000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	14000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	209000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-77000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1853000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1853000000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	12000000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	4000000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	57000000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	51000000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	4000000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	4000000	USD
CY2020	us-gaap	Stockholders Equity Other StockholdersEquityOther	2000000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-51000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-96000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1609000000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-51000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	209000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	310000000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	115000000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	104000000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	63000000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	30000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	79000000	USD
CY2020	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-40000000	USD
CY2019	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	-14000000	USD
CY2018	us-gaap	Deferred Income Taxes And Tax Credits DeferredIncomeTaxesAndTaxCredits	26000000	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	18000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	17000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-2000000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	99000000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	98000000	USD
CY2019	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
CY2018	us-gaap	Other Asset Impairment Charges OtherAssetImpairmentCharges	0	USD
CY2020	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	0	USD
CY2019	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	0	USD
CY2018	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	108000000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-43000000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-34000000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-24000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-127000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	16000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	203000000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-39000000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	31000000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-25000000	USD
CY2020	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-29000000	USD
CY2019	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-39000000	USD
CY2018	us-gaap	Increase Decrease In Accounts And Other Receivables IncreaseDecreaseInAccountsAndOtherReceivables	-3000000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-40000000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	23000000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	112000000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-134000000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	19000000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-60000000	USD
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	38000000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-9000000	USD
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	11000000	USD
CY2020	kbr	Increase Decrease In Payments On Operating Lease Liabilities IncreaseDecreaseInPaymentsOnOperatingLeaseLiabilities	-61000000	USD
CY2019	kbr	Increase Decrease In Payments On Operating Lease Liabilities IncreaseDecreaseInPaymentsOnOperatingLeaseLiabilities	-56000000	USD
CY2018	kbr	Increase Decrease In Payments On Operating Lease Liabilities IncreaseDecreaseInPaymentsOnOperatingLeaseLiabilities	0	USD
CY2020	kbr	Collections Repayment Of Advances From To Unconsolidated Affiliates Net CollectionsRepaymentOfAdvancesFromToUnconsolidatedAffiliatesNet	15000000	USD
CY2019	kbr	Collections Repayment Of Advances From To Unconsolidated Affiliates Net CollectionsRepaymentOfAdvancesFromToUnconsolidatedAffiliatesNet	10000000	USD
CY2018	kbr	Collections Repayment Of Advances From To Unconsolidated Affiliates Net CollectionsRepaymentOfAdvancesFromToUnconsolidatedAffiliatesNet	12000000	USD
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	38000000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	69000000	USD
CY2018	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	75000000	USD
CY2020	kbr	Increase Decreasein Reservefor Employee Benefits IncreaseDecreaseinReserveforEmployeeBenefits	-46000000	USD
CY2019	kbr	Increase Decreasein Reservefor Employee Benefits IncreaseDecreaseinReserveforEmployeeBenefits	-45000000	USD
CY2018	kbr	Increase Decreasein Reservefor Employee Benefits IncreaseDecreaseinReserveforEmployeeBenefits	-41000000	USD
CY2020	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	89000000	USD
CY2019	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	0	USD
CY2018	us-gaap	Increase Decrease In Restructuring Reserve IncreaseDecreaseInRestructuringReserve	0	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-57000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	28000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	7000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	367000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	256000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	165000000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	20000000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	20000000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	17000000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	1000000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	9000000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	25000000	USD
CY2020	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	26000000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	146000000	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	344000000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	832000000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	354000000	USD
CY2020	kbr	Cashand Cash Equivalents Period Increase Decrease Dueto Consolidationof Vie CashandCashEquivalentsPeriodIncreaseDecreaseDuetoConsolidationofVIE	0	USD
CY2019	kbr	Cashand Cash Equivalents Period Increase Decrease Dueto Consolidationof Vie CashandCashEquivalentsPeriodIncreaseDecreaseDuetoConsolidationofVIE	0	USD
CY2018	kbr	Cashand Cash Equivalents Period Increase Decrease Dueto Consolidationof Vie CashandCashEquivalentsPeriodIncreaseDecreaseDuetoConsolidationofVIE	197000000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1000000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-877000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-158000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-491000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	359000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1075000000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	260000000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	250000000	USD
CY2020	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	281000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	70000000	USD
CY2018	us-gaap	Repayments Of Long Term Debt And Capital Securities RepaymentsOfLongTermDebtAndCapitalSecurities	100000000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	720000000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	5000000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	57000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	22000000	USD
CY2020	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	0	USD
CY2019	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	0	USD
CY2018	us-gaap	Payments For Hedge Financing Activities PaymentsForHedgeFinancingActivities	62000000	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	350000000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	54000000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	46000000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	44000000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	4000000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	5000000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2000000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	51000000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4000000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3000000	USD
CY2020	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2019	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2018	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1000000	USD
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	USD
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	56000000	USD
CY2020	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2019	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	1000000	USD
CY2018	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2020	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	4000000	USD
CY2019	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	14000000	USD
CY2018	us-gaap	Payments Of Dividends Minority Interest PaymentsOfDividendsMinorityInterest	3000000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3000000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5000000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1000000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	225000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-133000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	654000000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	54000000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21000000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9000000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	8000000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-28000000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-276000000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-27000000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	300000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	712000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	739000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	439000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	436000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	712000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	739000000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	53000000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	80000000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	52000000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	49000000	USD
CY2020	kbr	Proceeds From Technology Rights Noncash Investing Activities ProceedsFromTechnologyRightsNoncashInvestingActivities	0	USD
CY2019	kbr	Proceeds From Technology Rights Noncash Investing Activities ProceedsFromTechnologyRightsNoncashInvestingActivities	0	USD
CY2018	kbr	Proceeds From Technology Rights Noncash Investing Activities ProceedsFromTechnologyRightsNoncashInvestingActivities	16000000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	14000000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	11000000	USD
CY2018Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	11000000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify;text-indent:11.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div style="text-align:justify;text-indent:11.25pt"><span><br/></span></div><div style="text-align:justify;text-indent:27pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of our consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of certain assets and liabilities; the reported amounts of revenues and expenses for the periods covered and certain amounts disclosed in the notes to our consolidated financial statements. These estimates are based on information available through the date of the issuance of the financial statements and actual results could differ from those estimates. Areas requiring significant estimates and assumptions by our management include the following: </span></div><div style="text-align:justify;text-indent:27pt"><span><br/></span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">project revenues, costs and profits on our contracts, including recognition of estimated losses on uncompleted contracts </span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">award fees, costs and profits on government services contracts</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">provisions for uncollectible receivables and client claims and recoveries of costs from subcontractors, vendors and others</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">provisions for income taxes and related valuation allowances and tax uncertainties</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">recoverability of goodwill</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">recoverability of other intangibles and long-lived assets and related estimated lives</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">recoverability of equity method investments</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">valuation of pension obligations and pension assets</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">accruals for estimated liabilities, including litigation accruals</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">consolidation of VIEs</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">valuation of share-based compensation</span></div><div style="padding-left:54pt;text-align:justify;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">valuation of assets and liabilities acquired in business combinations</span></div>
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	683000000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	18000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	495000000	USD
CY2020Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019Q4	kbr	Advancesto Subcontractors AdvancestoSubcontractors	20000000	USD
CY2020	kbr	Period In Years That Unrecognized Actuarial Net Gains Losses Are Being Recognized PeriodInYearsThatUnrecognizedActuarialNetGainsLossesAreBeingRecognized	P25Y
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="text-align:justify;text-indent:11.25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentration of Credit Risk </span></div><div style="text-align:justify;text-indent:11.25pt"><span><br/></span></div><div style="text-align:justify;text-indent:27pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments which potentially subject our company to concentrations of credit risk consist principally of cash and cash equivalents, and trade receivables. Our cash is primarily held with major banks and financial institutions throughout the world. We believe the risk of any potential loss on deposits held in these institutions is minimal. </span></div><div style="text-align:justify"><span><br/></span></div><div style="text-align:justify;text-indent:27pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Contracts with clients usually contain standard provisions allowing the client to curtail or terminate contracts for convenience. Upon such a termination, we are generally entitled to recover costs incurred, settlement expenses and profit on work completed prior to termination and demobilization cost. </span></div>We have revenues and receivables from transactions with an external customer that amounts to 10% or more of our revenues (which are generally not collateralized). We generated significant revenues from transactions with the U.S. government and U.K. government within our GS business segment. No other customers represented 10% or more of consolidated revenues in any of the periods presented.
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P5Y
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	71000000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	65000000	USD
CY2020Q4	us-gaap	Value Added Tax Receivable Current ValueAddedTaxReceivableCurrent	22000000	USD
CY2019Q4	us-gaap	Value Added Tax Receivable Current ValueAddedTaxReceivableCurrent	37000000	USD
CY2020Q4	kbr	Advancesto Subcontractors AdvancestoSubcontractors	10000000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	24000000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	121000000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	146000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	12000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	27000000	USD
CY2020Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	16000000	USD
CY2019Q4	us-gaap	Provision For Loss On Contracts ProvisionForLossOnContracts	10000000	USD
CY2020Q4	kbr	Retainage Payable RetainagePayable	22000000	USD
CY2019Q4	kbr	Retainage Payable RetainagePayable	41000000	USD
CY2020Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	16000000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	25000000	USD
CY2020Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	32000000	USD
CY2019Q4	us-gaap	Restructuring Reserve Current RestructuringReserveCurrent	0	USD
CY2020Q4	kbr	Value Added Tax Payable Current ValueAddedTaxPayableCurrent	29000000	USD
CY2019Q4	kbr	Value Added Tax Payable Current ValueAddedTaxPayableCurrent	36000000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	14000000	USD
CY2019Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	11000000	USD
CY2020Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	52000000	USD
CY2019Q4	us-gaap	Other Sundry Liabilities Current OtherSundryLiabilitiesCurrent	36000000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	193000000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	186000000	USD
CY2020Q4	kbr	Business Segment Numberof Core Business Segment BusinessSegmentNumberofCoreBusinessSegment	2	segment
CY2020Q4	kbr	Business Segment Numberof Noncore Business Segment BusinessSegmentNumberofNoncoreBusinessSegment	1	segment
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5767000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5639000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4913000000	USD
CY2020	us-gaap	Gross Profit GrossProfit	666000000	USD
CY2019	us-gaap	Gross Profit GrossProfit	653000000	USD
CY2018	us-gaap	Gross Profit GrossProfit	584000000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	30000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35000000	USD
CY2018	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	79000000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	335000000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	341000000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	294000000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	9000000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	2000000	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	7000000	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	99000000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5639000000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	214000000	USD
CY2019	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	USD
CY2018	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	18000000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	17000000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-2000000	USD
CY2020	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	0	USD
CY2019	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	0	USD
CY2018	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	108000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	57000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	362000000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	468000000	USD
CY2020	us-gaap	Interest Expense InterestExpense	83000000	USD
CY2019	us-gaap	Interest Expense InterestExpense	99000000	USD
CY2018	us-gaap	Interest Expense InterestExpense	66000000	USD
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	1000000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	5000000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-6000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-25000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	268000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	396000000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	20000000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	20000000	USD
CY2018	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	17000000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	115000000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	104000000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	63000000	USD
CY2020Q4	us-gaap	Assets Assets	5705000000	USD
CY2019Q4	us-gaap	Assets Assets	5360000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1761000000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1265000000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	881000000	USD
CY2019Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	846000000	USD
CY2020	us-gaap	Revenues Revenues	5767000000	USD
CY2019	us-gaap	Revenues Revenues	5639000000	USD
CY2018	us-gaap	Revenues Revenues	4913000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	130000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	130000000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5767000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5639000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4913000000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5767000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4913000000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5767000000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5639000000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4913000000	USD
CY2020	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	49000000	USD
CY2019	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	15000000	USD
CY2018	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	69000000	USD
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	12000000000.0	USD
CY2020Q4	kbr	Revenue Remaining Performance Obligation Expected To Be Satisfied Percentage RevenueRemainingPerformanceObligationExpectedToBeSatisfiedPercentage	0.32
CY2020Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020Q4	kbr	Revenue Remaining Performance Obligation Expected To Be Satisfied Percentage RevenueRemainingPerformanceObligationExpectedToBeSatisfiedPercentage	0.33
CY2020Q4	kbr	Revenue Remaining Performance Obligation Expected To Be Satisfied Percentage RevenueRemainingPerformanceObligationExpectedToBeSatisfiedPercentage	0.35
CY2020Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	178000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	215000000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	356000000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	484000000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	324000000	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	0	USD
CY2020Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	899000000	USD
CY2019Q4	us-gaap	Accounts Notes And Loans Receivable Net Current AccountsNotesAndLoansReceivableNetCurrent	938000000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	436000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	712000000	USD
CY2019Q4	us-gaap	Unapproved Change Orders Amount UnapprovedChangeOrdersAmount	978000000	USD
CY2018Q4	us-gaap	Unapproved Change Orders Amount UnapprovedChangeOrdersAmount	973000000	USD
CY2020	kbr	Unapproved Change Orders Increase Decrease In Estimates UnapprovedChangeOrdersIncreaseDecreaseInEstimates	-1000000	USD
CY2019	kbr	Unapproved Change Orders Increase Decrease In Estimates UnapprovedChangeOrdersIncreaseDecreaseInEstimates	21000000	USD
CY2020	kbr	Approved Change Orders ApprovedChangeOrders	6000000	USD
CY2019	kbr	Approved Change Orders ApprovedChangeOrders	7000000	USD
CY2020	kbr	Unapproved Change Orders Increase Decrease In Foreign Currency Effect UnapprovedChangeOrdersIncreaseDecreaseInForeignCurrencyEffect	77000000	USD
CY2019	kbr	Unapproved Change Orders Increase Decrease In Foreign Currency Effect UnapprovedChangeOrdersIncreaseDecreaseInForeignCurrencyEffect	-9000000	USD
CY2020Q4	us-gaap	Unapproved Change Orders Amount UnapprovedChangeOrdersAmount	1048000000	USD
CY2019Q4	us-gaap	Unapproved Change Orders Amount UnapprovedChangeOrdersAmount	978000000	USD
CY2020	kbr	Unapproved Change Orders And Claims Recorded In Revenues UnapprovedChangeOrdersAndClaimsRecordedInRevenues	1048000000	USD
CY2019	kbr	Unapproved Change Orders And Claims Recorded In Revenues UnapprovedChangeOrdersAndClaimsRecordedInRevenues	974000000	USD
CY2020Q4	kbr	Commitments Estimated Recovery CommitmentsEstimatedRecovery	1800000000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	214000000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	116000000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	98000000	USD
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	214000000	USD
CY2020	us-gaap	Other Restructuring Costs OtherRestructuringCosts	19000000	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	91000000	USD
CY2020	us-gaap	Restructuring Charges RestructuringCharges	116000000	USD
CY2020	kbr	Restructuring Charges Operating Lease Liabilities RestructuringChargesOperatingLeaseLiabilities	-4000000	USD
CY2020	us-gaap	Payments For Restructuring PaymentsForRestructuring	21000000	USD
CY2020	us-gaap	Restructuring Reserve Translation Adjustment RestructuringReserveTranslationAdjustment	0	USD
CY2020Q4	us-gaap	Restructuring Reserve RestructuringReserve	91000000	USD
CY2020	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	47000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	549000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	516000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	419000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	386000000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	130000000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	130000000	USD
CY2020	us-gaap	Depreciation Depreciation	36000000	USD
CY2019	us-gaap	Depreciation Depreciation	33000000	USD
CY2018	us-gaap	Depreciation Depreciation	31000000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1265000000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1265000000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	589000000	USD
CY2020	us-gaap	Goodwill Transfers GoodwillTransfers	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	99000000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	6000000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	1761000000	USD
CY2020Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	62000000	USD
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	911000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	228000000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	683000000	USD
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	679000000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	184000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	495000000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	42000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	33000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	32000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	63000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	37000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	37000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	37000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	37000000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	422000000	USD
CY2019	kbr	Equity Method Investment Amount Allocatedto Fund Ownership Venture EquityMethodInvestmentAmountAllocatedtoFundOwnershipVenture	141000000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	83000000	USD
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	63000000	USD
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	56000000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	2025000000	USD
CY2019Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	1787000000	USD
CY2020Q4	kbr	Deferred Compensation Arrangement Funded Amount DeferredCompensationArrangementFundedAmount	11000000	USD
CY2019Q4	kbr	Deferred Compensation Arrangement Funded Amount DeferredCompensationArrangementFundedAmount	10000000	USD
CY2020Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	64000000	USD
CY2019Q4	us-gaap	Deferred Compensation Liability Classified Noncurrent DeferredCompensationLiabilityClassifiedNoncurrent	65000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1596000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1210000000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	12000000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	27000000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1584000000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1183000000	USD
CY2020Q4	us-gaap	Line Of Credit LineOfCredit	1795000000	USD
CY2018Q4	us-gaap	Non Recourse Debt NonRecourseDebt	62000000	GBP
CY2018Q4	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	22000000	USD
CY2018Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	40.02
CY2018Q4	kbr	Class Of Warrant Or Right Percentage Of Strike Price Above Reported Last Sale Price ClassOfWarrantOrRightPercentageOfStrikePriceAboveReportedLastSalePrice	0.29
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-208000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	2000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	44000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	183000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	266000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	352000000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-25000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	268000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	396000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	86000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-1000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-1000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	2000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	26000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	11000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-14000000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-3000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-2000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-3000000	USD
CY2020	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	-4000000	USD
CY2019	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	45000000	USD
CY2018	us-gaap	Income Tax Expense Benefit Intraperiod Tax Allocation IncomeTaxExpenseBenefitIntraperiodTaxAllocation	99000000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-29000000	USD
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-29000000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	62000000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-11000000	USD
CY2020	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	51000000	USD
CY2020	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	4000000	USD
CY2020	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	0	USD
CY2020	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	4000000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	66000000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-40000000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	26000000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	4000000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-15000000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-11000000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	67000000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-1000000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	66000000	USD
CY2019	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	2000000	USD
CY2019	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	2000000	USD
CY2019	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	4000000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	73000000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-14000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	59000000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1000000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6000000	USD
CY2018	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	7000000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	56000000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	20000000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0.03
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.10
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.02
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.05
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.02
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.07
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.03
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Minority Interest Income Expense EffectiveIncomeTaxRateReconciliationMinorityInterestIncomeExpense	-0.01
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.02
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.01
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.04
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.03
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.02
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.01
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.03
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings	-0.01
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0
CY2020	kbr	Effective Income Tax Rate Reconciliation Non Deductible Goodwill And Restructuring Charges Percent EffectiveIncomeTaxRateReconciliationNonDeductibleGoodwillAndRestructuringChargesPercent	-1.30
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	76000000	USD
CY2018	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	2000000	USD
CY2018	us-gaap	Deferred Other Tax Expense Benefit DeferredOtherTaxExpenseBenefit	1000000	USD
CY2018	us-gaap	Other Income Tax Expense Benefit Continuing Operations OtherIncomeTaxExpenseBenefitContinuingOperations	3000000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	59000000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	27000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	86000000	USD
CY2020	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	51000000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	66000000	USD
CY2018	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	76000000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2019	kbr	Effective Income Tax Rate Reconciliation Non Deductible Goodwill And Restructuring Charges Percent EffectiveIncomeTaxRateReconciliationNonDeductibleGoodwillAndRestructuringChargesPercent	0
CY2018	kbr	Effective Income Tax Rate Reconciliation Non Deductible Goodwill And Restructuring Charges Percent EffectiveIncomeTaxRateReconciliationNonDeductibleGoodwillAndRestructuringChargesPercent	0
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-1.05
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.22
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.22
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	149000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	103000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	243000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	257000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	105000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	96000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	8000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	7000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	4000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	2000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	66000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	63000000	USD
CY2020Q4	kbr	Deferred Tax Asset Construction Contract Accounting DeferredTaxAssetConstructionContractAccounting	7000000	USD
CY2019Q4	kbr	Deferred Tax Asset Construction Contract Accounting DeferredTaxAssetConstructionContractAccounting	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	48000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	630000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	532000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	220000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	200000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	410000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	332000000	USD
CY2020Q4	kbr	Deferred Tax Liabilities Construction Contract Accounting DeferredTaxLiabilitiesConstructionContractAccounting	0	USD
CY2019Q4	kbr	Deferred Tax Liabilities Construction Contract Accounting DeferredTaxLiabilitiesConstructionContractAccounting	6000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	80000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	56000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	60000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	49000000	USD
CY2020Q4	kbr	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	-3000000	USD
CY2019Q4	kbr	Deferred Tax Liabilities Depreciation And Amortization DeferredTaxLiabilitiesDepreciationAndAmortization	-2000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	2000000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Reserves And Accruals DeferredTaxLiabilitiesDeferredExpenseReservesAndAccruals	3000000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	139000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	112000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	271000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	220000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	220000000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	200000000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	20000000	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-7000000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies Foreign IncomeTaxReconciliationTaxContingenciesForeign	762000000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Contingencies Domestic IncomeTaxReconciliationTaxContingenciesDomestic	605000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2020Q4	kbr	Gross Assets Liabilities Net GrossAssetsLiabilitiesNet	491000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	220000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	271000000	USD
CY2020Q4	kbr	Gross Deferred Tax Assets Tax Credit Carryforwards Foreign GrossDeferredTaxAssetsTaxCreditCarryforwardsForeign	243000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	144000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Not Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration	37000000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards State And Local DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal	1242000000	USD
CY2020Q4	us-gaap	Undistributed Earnings Of Foreign Subsidiaries UndistributedEarningsOfForeignSubsidiaries	1900000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	97000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	90000000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	184000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	6000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	7000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	18000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	7000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	45000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	62000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2000000	USD
CY2020	kbr	Unrecognized Tax Benefits Other Increase Decrease UnrecognizedTaxBenefitsOtherIncreaseDecrease	2000000	USD
CY2019	kbr	Unrecognized Tax Benefits Other Increase Decrease UnrecognizedTaxBenefitsOtherIncreaseDecrease	-1000000	USD
CY2018	kbr	Unrecognized Tax Benefits Other Increase Decrease UnrecognizedTaxBenefitsOtherIncreaseDecrease	-4000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	96000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	97000000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	90000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	82000000	USD
CY2020Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	9000000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	29000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	23000000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	4000000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	3000000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-1000000	USD
CY2020Q4	kbr	Duetoformerparentuponreceiptfrom Irs DuetoformerparentuponreceiptfromIRS	5000000	USD
CY2019Q4	kbr	Duetoformerparentuponreceiptfrom Irs DuetoformerparentuponreceiptfromIRS	5000000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	30000000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	59000000	USD
CY2020Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	42000000	USD
CY2019Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	42000000	USD
CY2020	kbr	Lessee Operating Lease Percentage Of Lease Obligations Related To Real Estate LesseeOperatingLeasePercentageOfLeaseObligationsRelatedToRealEstate	0.86
CY2020Q4	us-gaap	Lessee Operating Lease Term Of Contract LesseeOperatingLeaseTermOfContract	P12M
CY2020	kbr	Lessee Operating Lease Renewal Term Increments LesseeOperatingLeaseRenewalTermIncrements	P1Y
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	50000000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	54000000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	112000000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	121000000	USD
CY2020	us-gaap	Lease Cost LeaseCost	162000000	USD
CY2019	us-gaap	Lease Cost LeaseCost	175000000	USD
CY2020	kbr	Operating Lease Rightof Use Asset Amortization OperatingLeaseRightofUseAssetAmortization	37000000	USD
CY2019	kbr	Operating Lease Rightof Use Asset Amortization OperatingLeaseRightofUseAssetAmortization	38000000	USD
CY2020	kbr	Other Noncash Operating Lease Cost Related To Accretion Of Operating Lease Liabilities And Straight Line Lease Accounting OtherNoncashOperatingLeaseCostRelatedToAccretionOfOperatingLeaseLiabilitiesAndStraightLineLeaseAccounting	13000000	USD
CY2019	kbr	Other Noncash Operating Lease Cost Related To Accretion Of Operating Lease Liabilities And Straight Line Lease Accounting OtherNoncashOperatingLeaseCostRelatedToAccretionOfOperatingLeaseLiabilitiesAndStraightLineLeaseAccounting	16000000	USD
CY2020	kbr	Total Shortterm Lease Commitments TotalShorttermLeaseCommitments	107000000	USD
CY2019	kbr	Total Shortterm Lease Commitments TotalShorttermLeaseCommitments	77000000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	61000000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	56000000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	11000000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	6000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	62000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	20000000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	34000000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	13000000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.068
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.076
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.047
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.056
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	56000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	48000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	42000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	32000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	27000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	86000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	291000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	12000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	8000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	3000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	2000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	25000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability Payments Due Next Twelve Months OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueNextTwelveMonths	68000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability To Be Paid Year Two OperatingLeaseAndFinanceLeaseLiabilityToBePaidYearTwo	56000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability To Be Paid Year Three OperatingLeaseAndFinanceLeaseLiabilityToBePaidYearThree	45000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability To Be Paid Year Four OperatingLeaseAndFinanceLeaseLiabilityToBePaidYearFour	34000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability To Be Paid Year Five OperatingLeaseAndFinanceLeaseLiabilityToBePaidYearFive	27000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability Payments Due After Year Five OperatingLeaseAndFinanceLeaseLiabilityPaymentsDueAfterYearFive	86000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability Payment Due OperatingLeaseAndFinanceLeaseLiabilityPaymentDue	316000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	291000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	25000000	USD
CY2020Q4	kbr	Operating Lease And Finance Lease Liability Payment Due OperatingLeaseAndFinanceLeaseLiabilityPaymentDue	316000000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	61000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	2000000	USD
CY2020Q4	kbr	Operating And Finance Lease Liability Undiscounted Excess Amount OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount	63000000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	230000000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	23000000	USD
CY2020Q4	kbr	Operating And Finance Lease Liability OperatingAndFinanceLeaseLiability	253000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	44000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	11000000	USD
CY2020Q4	kbr	Operating And Finance Lease Liability Current OperatingAndFinanceLeaseLiabilityCurrent	55000000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	186000000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	12000000	USD
CY2020Q4	kbr	Operating And Finance Lease Liability Noncurrent OperatingAndFinanceLeaseLiabilityNoncurrent	198000000	USD
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	177400000	shares
CY2019	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	900000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	178300000	shares
CY2020	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	800000	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	179100000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	36500000	shares
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	817000000	USD
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2019	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	0	USD
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	36500000	shares
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	817000000	USD
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1800000	shares
CY2020	us-gaap	Treasury Stock Value Acquired Par Value Method TreasuryStockValueAcquiredParValueMethod	47000000	USD
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	38300000	shares
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	864000000	USD
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	57000000	USD
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	46000000	USD
CY2014Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	350000000	USD
CY2019Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	160000000	USD
CY2020Q1	kbr	Stock Repurchase Program Increase In Authorized Amount StockRepurchaseProgramIncreaseInAuthorizedAmount	190000000	USD
CY2020Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	350000000	USD
CY2020	kbr	Employee Stock Purchase Plan Percent Of Earnings EmployeeStockPurchasePlanPercentOfEarnings	0.10
CY2014Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	350000000	USD
CY2020	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	168671	shares
CY2020	kbr	Share Based Payment Arrangement Shares Withheld For Tax Withholding Obligation Share Price ShareBasedPaymentArrangementSharesWithheldForTaxWithholdingObligationSharePrice	25.65
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4000000	USD
CY2020	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	1992105	shares
CY2020	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	25.70
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	51000000	USD
CY2014Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	350000000	USD
CY2019	us-gaap	Shares Paid For Tax Withholding For Share Based Compensation SharesPaidForTaxWithholdingForShareBasedCompensation	194124	shares
CY2019	kbr	Share Based Payment Arrangement Shares Withheld For Tax Withholding Obligation Share Price ShareBasedPaymentArrangementSharesWithheldForTaxWithholdingObligationSharePrice	20.59
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12000000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10000000	USD
CY2019	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	194124	shares
CY2019	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	20.59
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	4000000	USD
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P10Y
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P10Y
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12000000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3000000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3000000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2000000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	1000000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	0	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	1000000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	142000000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	141000000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	140000000	shares
CY2020	kbr	Incremental Common Shares Attributable To Dilutive Effect Of Sharebased Payment Arrangements And Conversion Of Debt Securities IncrementalCommonSharesAttributableToDilutiveEffectOfSharebasedPaymentArrangementsAndConversionOfDebtSecurities	0	shares
CY2019	kbr	Incremental Common Shares Attributable To Dilutive Effect Of Sharebased Payment Arrangements And Conversion Of Debt Securities IncrementalCommonSharesAttributableToDilutiveEffectOfSharebasedPaymentArrangementsAndConversionOfDebtSecurities	1000000	shares
CY2018	kbr	Incremental Common Shares Attributable To Dilutive Effect Of Sharebased Payment Arrangements And Conversion Of Debt Securities IncrementalCommonSharesAttributableToDilutiveEffectOfSharebasedPaymentArrangementsAndConversionOfDebtSecurities	1000000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	142000000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	142000000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	141000000	shares
CY2020	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2019	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1500000	USD
CY2019	kbr	Undistributed Earnings Loss Allocatedto Participating Securities Diluted Per Share UndistributedEarningsLossAllocatedtoParticipatingSecuritiesDilutedPerShare	0.01
CY2018	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	1800000	USD
CY2018	kbr	Undistributed Earnings Loss Allocatedto Participating Securities Diluted Per Share UndistributedEarningsLossAllocatedtoParticipatingSecuritiesDilutedPerShare	0.01
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1100000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1300000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1500000	shares
CY2020	kbr	Maximum Lengthof Time Hedgedin Balance Sheet Hedge MaximumLengthofTimeHedgedinBalanceSheetHedge	P15D
CY2020	us-gaap	Maximum Length Of Time Hedged In Cash Flow Hedge1 MaximumLengthOfTimeHedgedInCashFlowHedge1	P7M
CY2020	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	-5000000	USD
CY2019	us-gaap	Gain Loss On Fair Value Hedges Recognized In Earnings GainLossOnFairValueHedgesRecognizedInEarnings	1000000	USD
CY2020	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Foreign Currency Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInForeignCurrencyFairValueHedge1	9000000	USD
CY2019	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Foreign Currency Fair Value Hedge1 ChangeInUnrealizedGainLossOnHedgedItemInForeignCurrencyFairValueHedge1	3000000	USD
CY2020	us-gaap	Gain Loss On Foreign Currency Fair Value Hedge Derivatives GainLossOnForeignCurrencyFairValueHedgeDerivatives	4000000	USD
CY2019	us-gaap	Gain Loss On Foreign Currency Fair Value Hedge Derivatives GainLossOnForeignCurrencyFairValueHedgeDerivatives	4000000	USD
CY2020Q4	us-gaap	Transfer Of Financial Assets Accounted For As Sales Amount Derecognized TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized	779000000	USD
CY2020Q4	us-gaap	Profit Loss ProfitLoss	20000000	USD
CY2020Q4	us-gaap	Transfer Of Financial Assets Accounted For As Sales Amount Derecognized TransferOfFinancialAssetsAccountedForAsSalesAmountDerecognized	779000000	USD
CY2020Q4	us-gaap	Transfer Of Financial Assets Accounted For As Sales Cash Proceeds Received For Assets Derecognized Amount TransferOfFinancialAssetsAccountedForAsSalesCashProceedsReceivedForAssetsDerecognizedAmount	647000000	USD
CY2020Q4	kbr	Transfer Of Financial Assets Accounted For As Sales Cash Collection Not Yet Remitted Derecognized TransferOfFinancialAssetsAccountedForAsSalesCashCollectionNotYetRemittedDerecognized	20000000	USD
CY2020	kbr	Transfer Of Financial Assets Accounted For As Sales Net Amount Derecognized TransferOfFinancialAssetsAccountedForAsSalesNetAmountDerecognized	112000000	USD
CY2020	kbr	Transfer Of Financial Assets Accounted For As Sales Term Of Agreement TransferOfFinancialAssetsAccountedForAsSalesTermOfAgreement	P1Y
CY2020	us-gaap	Proceeds From Sale And Collection Of Receivables ProceedsFromSaleAndCollectionOfReceivables	723000000	USD
CY2020Q1	us-gaap	Revenues Revenues	1537000000	USD
CY2020Q2	us-gaap	Revenues Revenues	1385000000	USD
CY2020Q3	us-gaap	Revenues Revenues	1379000000	USD
CY2020Q4	us-gaap	Revenues Revenues	1466000000	USD
CY2020	us-gaap	Revenues Revenues	5767000000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	186000000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	142000000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	172000000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	166000000	USD
CY2020	us-gaap	Gross Profit GrossProfit	666000000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1000000	USD
CY2020Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	16000000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	13000000	USD
CY2020Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	30000000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-69000000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-12000000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	93000000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	45000000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	57000000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-84000000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	-39000000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	52000000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	-51000000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	20000000	USD
CY2020Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1000000	USD
CY2020	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	21000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-104000000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-39000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	52000000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	19000000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-72000000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.73
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.28
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.36
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.14
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.51
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.41
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.73
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.28
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.36
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.51
CY2019Q1	us-gaap	Revenues Revenues	1340000000	USD
CY2019Q2	us-gaap	Revenues Revenues	1422000000	USD
CY2019Q3	us-gaap	Revenues Revenues	1425000000	USD
CY2019Q4	us-gaap	Revenues Revenues	1452000000	USD
CY2019	us-gaap	Revenues Revenues	5639000000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	153000000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	160000000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	169000000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	171000000	USD
CY2019	us-gaap	Gross Profit GrossProfit	653000000	USD
CY2019Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	0	USD
CY2019Q2	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	15000000	USD
CY2019Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	9000000	USD
CY2019Q4	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11000000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	35000000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	78000000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	92000000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	104000000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	88000000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	362000000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	42000000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	50000000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	58000000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	59000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	209000000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2000000	USD
CY2019Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2000000	USD
CY2019Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2000000	USD
CY2019Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1000000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	7000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	40000000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	48000000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	56000000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	58000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	202000000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.39
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.42
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.39
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.40

Files In Submission

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0001357615-21-000124.txt	Edgar Link	pending
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$KBR
KBR, INC. Stock $kbr

2020 Q4 Form 8-K Financial Statement

#000135761521000124 Filed on July 29, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KBR KBR, INC. Stock $kbr

2020 Q4 Form 8-K Financial Statement

#000135761521000124 Filed on July 29, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$KBR
KBR, INC. Stock $kbr