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Business Segment Information (Schedule Of Balance Sheet Information By Operating Segment) (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
--- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |
Total assets | $ 3,412 | $ 4,078 |
Goodwill | 324 | 324 |
Equity in and advances to unconsolidated affiliates | 281 | 151 |
Non-strategic Business [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill |  |  | $ 153
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 3,378 | 3,908 |
Goodwill | 324 | 324 | 619
Equity in and advances to unconsolidated affiliates | 281 | 150 |
Operating Segments [Member] | Technology and Consulting [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 198 | 173 |
Goodwill | 31 | 31 | 31
Equity in and advances to unconsolidated affiliates | 0 | 0 |
Operating Segments [Member] | Engineering and Construction [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 1,656 | 2,008 |
Goodwill | 233 | 233 | 528
Equity in and advances to unconsolidated affiliates | 255 | 119 |
Operating Segments [Member] | Government Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 464 | 545 |
Goodwill | 60 | 60 | $ 60
Equity in and advances to unconsolidated affiliates | 26 | 31 |
Operating Segments [Member] | Other Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 1,060 | 1,182 |
Goodwill | 0 | 0 |
Equity in and advances to unconsolidated affiliates | 0 | 0 |
Operating Segments [Member] | Non-strategic Business [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total assets | 34 | 170 |
Goodwill | 0 | 0 |
Equity in and advances to unconsolidated affiliates | $ 0 | $ 1 |

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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 + Details
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