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Equity Method Investments And Variable Interest Entities (Narrative) (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2006 | Mar. 31, 2015 USD ($) | Sep. 30, 2015 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Other Asset Impairment Charges |  |  |  | $ 31 | $ 171 | $ 0
Noncontrolling Interest in Variable Interest Entity |  | $ 40 |  |  |  |
Payment to Partner |  | $ 8 |  |  |  |
Payments to Acquire Equity Method Investments |  |  |  | $ 19 | 0 | 0
Brown & Root JV [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |  |
Aspire Defence [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 45.00% |  |
Ichthys LNG Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 30.00% |  |
MMM [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |  |
Aspire Defence Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Term of contracted services portion of project (in years) | 35 years |  |  |  |  |
Term of construction portion of project (in years) | 9 years |  |  |  |  |
Amount of assets associated with our investment in a project on a unconsolidated VIE that is reported within our condensed consolidated balance sheet |  |  |  | $ 17 |  |
Amount of liabilities associated with our investment in a project on a unconsolidated VIE that is reported within our condensed consolidated balance sheet |  |  |  | 121 |  |
Aspire Defence Project [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  | 17 | 17 |
Ichthys LNG Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Amount of assets associated with our investment in a project on a unconsolidated VIE that is reported within our condensed consolidated balance sheet |  |  |  | 87 |  |
Amount of liabilities associated with our investment in a project on a unconsolidated VIE that is reported within our condensed consolidated balance sheet |  |  |  | 63 |  |
Ichthys LNG Project [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  | $ 87 | 49 |
U.K. Road Projects [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 25.00% |  |
U.K. Road Projects [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  | $ 34 | 34 |
Construction And Related Support Services Joint Ventures [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 50.00% |  |
EBIC Ammonia Plant [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Amount of assets associated with our investment in a project on a unconsolidated VIE that is reported within our condensed consolidated balance sheet |  |  |  | $ 36 |  |
Amount of liabilities associated with our investment in a project on a unconsolidated VIE that is reported within our condensed consolidated balance sheet |  |  |  | $ 2 |  |
EBIC Ammonia Plant [Member] | Parent Company [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Ownership percentage the enterprise has in a development company that has a minority interest in a VIE |  |  |  | 65.00% |  |
EBIC Ammonia Plant [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |  |  |  | $ 22 | 26 |
EBIC Ammonia Plant [Member] | Development Corporation [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Development company's ownership interest in a company that consolidates a VIE |  |  |  | 25.00% |  |
Fasttrax Limited Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 50.00% |  |
Percentage of subsidiary owned by the parent entity |  |  |  | 100.00% |  |
Assets collateralizing the Joint Venture's senior bonds, cash and equivalents |  |  |  | $ 20 |  |
Assets collateralizing the Joint Venture's senior bonds, property, plant and equipment |  |  |  | $ 48 |  |
Escravos Gas-To-Liquids Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 50.00% |  |
Cash held by consolidated joint ventures |  |  |  | $ 7 | 8 |
Gorgon LNG Project [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Variable interest entity, ownership percentage |  |  |  | 30.00% |  |
Transactions with Related Parties [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Revenue from Related Parties |  |  |  | $ 291 | 351 | $ 253
Accounts Receivable, Net, Current |  |  |  | $ 7 | $ 7 |
Nonrecourse Project Finance Debt [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 50.00% |  |
Number of heavy equipment transporters |  |  |  | 91 |  |
Industrial Services Business [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Proceeds from Divestiture of Businesses |  |  | $ 48 |  |  |
Canadian Pipe Fabrication Business [Member] | EPIC Piping LLC [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  | 19 |  |  |
Disposal Group, Not Discontinued Operations [Member] | Industrial Services Business [Member] |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain on Disposal |  |  | $ 7 |  |  |

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