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KBR Separation (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Sep. 30, 2011
Dec. 31, 2010
KBR Separation [Abstract]  
Arbitration award issued against KBR$ 201 
Beneficial interest in TSKJ of owners (in hundredths)25.00% 
KBR beneficial interest in MWKL (in hundredths)55.00% 
KBR indemnities and guarantees excluding amounts related to the DOJ and SEC settlements$ 201$ 63