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U.S. Government Matters (Details) $ in Millions		1 Months Ended	3 Months Ended						6 Months Ended			12 Months Ended
	Mar. 24, 2015 USD ($)	Apr. 30, 2008 USD ($)	Jun. 30, 2015 USD ($) lawsuits	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Jun. 30, 2015 USD ($) lawsuits defendent	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2009 lawsuits
United States Government Contract Work [Line Items]
Contracts Revenue			$ 1,381			$ 1,659			$ 2,817	$ 3,292
Retainage payable			67	$ 88					67
Unapproved claims included in accounts receivables related to various government contracts where costs have exceeded the customer's funded value of task orders			576	570					576
Amount of unapproved claims related to de-obligation of funding			332	490					332
All Defense Contract Audit Agency Audit Issues [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			174	188					174
Government Contract Receivable			84	96					84
Loss Contingency, Estimate of Possible Loss			27	25					27
Total Amount Of Payments Withheld From Subcontractors As Result Of Disapproved Costs Related To Dcaa Form 1 Issued To Enterprise			32	32					32
Private Security [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			56						56
Contracts Revenue									11
Government Contract Receivable			45						45
Containers [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			51						51
Contracts Revenue									25
Government Contract Receivable			26						26
Retainage payable			30						30
CONCAP III [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			25						25
Contracts Revenue									15
Government Contract Receivable			10						10
Amount Of Costs Deemed Unallowable									15
All Other Issues [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			42						42
Contracts Revenue									39
Government Contract Receivable			3						3
NonForm1Issues [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			11						11
Loss Contingency, Estimate of Possible Loss			4						4
Audits [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			44,000						44,000
Loss Contingency, Estimate of Possible Loss			25						$ 25
DisallowanceRate									0.00%
Litigation Settlement, Amount									$ (41)
OpenAudits [Member] [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			3,000						3,000
NegotiationsOpen [Member] [Member]
United States Government Contract Work [Line Items]
Litigation Settlement, Amount									(42)
First Kuwaiti Trading Company Arbitration [Member]
United States Government Contract Work [Line Items]
Total judgment on Sodium Dichromate	$ 3	$ 134
AmountOwedToSubcontractor			$ 30						30
PaymentsOnContractWork				$ 4	$ 15				3
Damages awarded, value									$ 17
Burn Pit Litigation [Member]
United States Government Contract Work [Line Items]
Loss Contingency, Pending Claims, Number | lawsuits			50						50
Sodium Dichromate Litigation [Member]
United States Government Contract Work [Line Items]
Contract Termination Claims, US Federal Government			$ 30						$ 30
Total judgment on Sodium Dichromate											$ 81
Loss Contingency, Pending Claims, Number | lawsuits			2						2				5
Loss Contingency, Number of Plaintiffs									170
Damages awarded, value							$ 6	$ 10			$ 75	$ 75
qui tams [Member]
United States Government Contract Work [Line Items]
qui tam government joined | lawsuits			1						1
Legal Fees									$ 12
DOJFCA [Member]
United States Government Contract Work [Line Items]
Loss Contingency, Number of Defendants | defendent									3
Claims [Member]
United States Government Contract Work [Line Items]
Government Contract Receivable			$ 180						$ 180
Unapproved claims included in accounts receivables related to various government contracts where costs have exceeded the customer's funded value of task orders			151						151
Amount of unapproved claims related to de-obligation of funding			$ 29						$ 29

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