KBR Separation (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	9 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2013 Indemnification Agreement [Member]
Loss Contingencies [Line Items]
KBR indemnities and guarantees	$ 0	$ 0	$ 0
KBR Settlement_Aggregate Amount		81
KBR Settlement_InitIal Payment Amount		12
KBR Settlement_Contingent Payment to be received		19
KBR Settlement_Total of Installment Payments	50	50	50
Payment of Barracuda-Caratinga obligation	1,100		0	219	219
Number of Payment Installments	4	4	4
KBR Settlement Agreement, Net of Income Tax		63
Gain (Loss) Related to Litigation Settlement		$ 195