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 |