Non Recourse Debt Bridge Financing

No definition available.

Name:	kbr_NonRecourseDebtBridgeFinancing
Namespace Prefix:	kbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Quantifies the amount of the VIE's assets

+ References

No definition available.

+ Details

Name:	kbr_VariableInterestEntityNonconsolidatedAssets
Namespace Prefix:	kbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Quantifies the amount of the VIE's liabilities

+ References

No definition available.

+ Details

Name:	kbr_VariableInterestEntityNonconsolidatedLiabilities
Namespace Prefix:	kbr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of debt for which creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property.

+ References

No definition available.

+ Details

Name:	us-gaap_NonRecourseDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (bb)

-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5710-111685

+ Details

Name:	us-gaap_VariableInterestEntityConsolidatedCarryingAmountAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

+ Details

Name:	us-gaap_VariableInterestEntityConsolidatedCarryingAmountLiabilities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph b

-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=52262685&loc=d3e5747-111685

+ Details

Name:	us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Equity Method Investments And Variable Interest Entities (Schedule Of Variable Interest Entities) (Details) In Millions, unless otherwise specified	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 31, 2015 Variable Interest Entity, Not Primary Beneficiary [Member] U.K. Road Projects [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] U.K. Road Projects [Member] USD ($)	Mar. 31, 2015 Variable Interest Entity, Not Primary Beneficiary [Member] Allenby Connaught Project [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] Allenby Connaught Project [Member] USD ($)	Mar. 31, 2015 Variable Interest Entity, Not Primary Beneficiary [Member] Ichthys LNG Project [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] Ichthys LNG Project [Member] USD ($)	Mar. 31, 2015 Variable Interest Entity, Not Primary Beneficiary [Member] EBIC Ammonia Project [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Not Primary Beneficiary [Member] EBIC Ammonia Project [Member] USD ($)	Mar. 31, 2015 Variable Interest Entity, Primary Beneficiary [Member] Fasttrax Limited Project [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Primary Beneficiary [Member] Fasttrax Limited Project [Member] USD ($)	Mar. 31, 2015 Variable Interest Entity, Primary Beneficiary [Member] Escravos Gas-To-Liquids Project [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Primary Beneficiary [Member] Escravos Gas-To-Liquids Project [Member] USD ($)	Mar. 31, 2015 Variable Interest Entity, Primary Beneficiary [Member] Gorgon LNG Project [Member] USD ($)	Dec. 31, 2014 Variable Interest Entity, Primary Beneficiary [Member] Gorgon LNG Project [Member] USD ($)	Mar. 31, 2015 Nonrecourse Project Finance Debt [Member] GBP (£)	Mar. 31, 2015 United States of America, Dollars Nonrecourse Project Finance Debt [Member] Fasttrax Limited Project [Member] USD ($)
Schedule of Equity Method Investments [Line Items]
Nonrecourse project debt	$ 60.0us-gaap_NonRecourseDebt	$ 63.0us-gaap_NonRecourseDebt															£ 84.9	$ 120.0
Unconsolidated VIEs, Total assets			33	34	16	17	49	49	40	42
Unconsolidated VIEs, Total liabilities			11	11	121	118	42	35	2	2
Maximum exposure to loss			33		16		49		25
Consolidated VIEs, Total assets											82	83	14	23	212	282
Consolidated VIEs, Total liabilities											79	81	30	36	236	309
Non-recourse debt bridge financing																	£ 12.2	$ 17.0