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Equity Method Investments And Variable Interest Entities (Schedule Of Variable Interest Entities) (Details) - USD ($)
$ in Millions
Jun. 30, 2015
Dec. 31, 2014
Variable Interest Entity, Not Primary Beneficiary [Member] | Aspire Defence Project [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated VIEs, Total assets $ 17 $ 17
Unconsolidated VIEs, Total liabilities 125 118
Maximum exposure to loss 17  
Variable Interest Entity, Not Primary Beneficiary [Member] | U.K. Road Projects [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated VIEs, Total assets 37 34
Unconsolidated VIEs, Total liabilities 11 11
Maximum exposure to loss 37  
Variable Interest Entity, Not Primary Beneficiary [Member] | Ichthys LNG Project [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated VIEs, Total assets 51 49
Unconsolidated VIEs, Total liabilities 45 35
Maximum exposure to loss 51  
Variable Interest Entity, Not Primary Beneficiary [Member] | EBIC Ammonia Project [Member]    
Schedule of Equity Method Investments [Line Items]    
Unconsolidated VIEs, Total assets 38 42
Unconsolidated VIEs, Total liabilities 2 2
Maximum exposure to loss 24  
Variable Interest Entity, Primary Beneficiary [Member] | Fasttrax Limited Project [Member]    
Schedule of Equity Method Investments [Line Items]    
Consolidated VIEs, Total assets 80 83
Consolidated VIEs, Total liabilities 77 81
Variable Interest Entity, Primary Beneficiary [Member] | Escravos Gas-To-Liquids Project [Member]    
Schedule of Equity Method Investments [Line Items]    
Consolidated VIEs, Total assets 18 23
Consolidated VIEs, Total liabilities 35 36
Variable Interest Entity, Primary Beneficiary [Member] | Gorgon LNG Project [Member]    
Schedule of Equity Method Investments [Line Items]    
Consolidated VIEs, Total assets 245 282
Consolidated VIEs, Total liabilities $ 266 $ 309