Equity Method Investments and Variable Interest Entities (Schedule of Variable Interest Entities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Variable Interest Entity, Not Primary Beneficiary | Affinity joint venture (U.K. MFTS project)
Schedule of Equity Method Investments [Line Items]
Total Assets	$ 14	$ 16
Total Liabilities	10	8
Variable Interest Entity, Not Primary Beneficiary | Aspire Defence Limited
Schedule of Equity Method Investments [Line Items]
Total Assets	67	68
Total Liabilities	5	5
Variable Interest Entity, Not Primary Beneficiary | JKC joint venture (Ichthys LNG project)
Schedule of Equity Method Investments [Line Items]
Total Assets	546	427
Total Liabilities	29	32
Variable Interest Entity, Not Primary Beneficiary | U.K. Road project joint ventures
Schedule of Equity Method Investments [Line Items]
Total Assets	40	37
Total Liabilities	21	10
Variable Interest Entity, Not Primary Beneficiary | Middle East Petroleum Corporation (EBIC Ammonia project)
Schedule of Equity Method Investments [Line Items]
Total Assets	47	51
Total Liabilities	1	1
Variable Interest Entity, Primary Beneficiary | Aspire Defence Limited
Schedule of Equity Method Investments [Line Items]
Consolidated VIEs, Total assets	530	589
Consolidated VIEs, Total liabilities	283	324
Variable Interest Entity, Primary Beneficiary | KJV-G joint venture (Gorgon LNG project)
Schedule of Equity Method Investments [Line Items]
Consolidated VIEs, Total assets	0	13
Consolidated VIEs, Total liabilities	17	19
Variable Interest Entity, Primary Beneficiary | Fasttrax Limited (Fasttrax project)
Schedule of Equity Method Investments [Line Items]
Consolidated VIEs, Total assets	45	49
Consolidated VIEs, Total liabilities	$ 24	$ 34