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CIE and BIE BIE (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014
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Billings in Excess of Cost | $ 484 | $ 531
Operating Segments [Member] |  |
Billings in Excess of Cost | 367 | 361
Operating Segments [Member] | Technology and Consulting [Member] |  |
Billings in Excess of Cost | 69 | 56
Operating Segments [Member] | Engineering and Construction [Member] |  |
Billings in Excess of Cost | 209 | 212
Operating Segments [Member] | Government Services [Member] |  |
Billings in Excess of Cost | 89 | 93
Operating Segments [Member] | Non-strategic Business [Member] |  |
Billings in Excess of Cost | $ 117 | $ 170

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- Definition Liability attributable to (i) billings in excess of costs under the percentage of completion contract accounting method representing the difference between contractually invoiced amounts (billings) and revenue recognized based, for example, on costs incurred to estimated total costs at period end or (ii) contractually invoiced amounts (billings) in excess of costs incurred and accumulated under the completed contract accounting method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57807-111642 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57788-111642 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 35 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51671739&loc=d3e57795-111642 + Details
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