KBR Separation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Loss Contingencies [Line Items]
KBR indemnities and guarantees	$ 0
Payment of Barracuda-Caratinga obligation	0	(219)
Tax Sharing Agreement Settlement And Foreign Unrecognized Tax Benefits	105
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Payment of Barracuda-Caratinga obligation		$ 219