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Goodwill And Intangible Assets (Summary Of Goodwill By Reportable Segments) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Line Items] |  |  |  |
Balance, Beginning of period |  | $ 324 |  |
Impairment of goodwill | $ (446) | 0 | $ (446) | $ 0
Balance, End of period | 324 | 324 | 324 |
Operating Segments [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Translation Adjustments |  |  | (2) |
Goodwill, Gross | 948 | 948 | 948 | 950
Balance, Beginning of period |  | 324 | 772 |
Impairment of goodwill |  | 0 | (446) |
Balance, End of period | 324 | 324 | 324 | 772
Goodwill, Impaired, Accumulated Impairment Loss | (624) | (624) | (624) | (178)
Non-strategic Business [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Gross | 331 | 331 | 331 | 331
Balance, Beginning of period |  |  | 153 |
Impairment of goodwill |  | 0 | (153) |
Balance, End of period |  |  |  | 153
Goodwill, Impaired, Accumulated Impairment Loss | (331) | (331) | (331) | (178)
Operating Segments [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Translation Adjustments |  | 0 | (2) |
Goodwill, Gross | 617 | 617 | 617 | 619
Balance, Beginning of period |  | 324 | 619 |
Impairment of goodwill |  | 0 | (293) | 0
Balance, End of period | 324 | 324 | 324 | 619
Goodwill, Impaired, Accumulated Impairment Loss | (293) | (293) | (293) | 0
Operating Segments [Member] | Other Segments [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Gross | 0 | 0 | 0 | 0
Balance, Beginning of period |  | 0 |  |
Impairment of goodwill |  | 0 | 0 | 0
Balance, End of period | 0 | 0 | 0 |
Goodwill, Impaired, Accumulated Impairment Loss | 0 | 0 | 0 | 0
Operating Segments [Member] | Technology and Consulting [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Translation Adjustments |  | 0 | 0 |
Goodwill, Gross | 31 | 31 | 31 | 31
Balance, Beginning of period |  | 31 | 31 |
Impairment of goodwill |  | 0 | 0 | 0
Balance, End of period | 31 | 31 | 31 | 31
Goodwill, Impaired, Accumulated Impairment Loss | 0 | 0 | 0 | 0
Operating Segments [Member] | Engineering and Construction [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Translation Adjustments |  |  | (2) |
Goodwill, Gross | 526 | 526 | 526 | 528
Balance, Beginning of period |  | 233 | 528 |
Impairment of goodwill |  | 0 | (293) | 0
Balance, End of period | 233 | 233 | 233 | 528
Goodwill, Impaired, Accumulated Impairment Loss | (293) | (293) | (293) | 0
Operating Segments [Member] | Government Services [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill, Gross | 60 | 60 | 60 | 60
Balance, Beginning of period |  | 60 | 60 |
Impairment of goodwill |  | 0 | 0 | 0
Balance, End of period | 60 | 60 | 60 | 60
Goodwill, Impaired, Accumulated Impairment Loss | 0 | 0 | 0 | 0
Operating Segments [Member] | Non-strategic Business [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Balance, Beginning of period |  | 0 |  |
Impairment of goodwill |  | 0 | (153) | $ 0
Balance, End of period | $ 0 | $ 0 | $ 0 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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