Segment Disclosures - Geographic Information (Details) - USD ($) |
12 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | $ 32,567,000,000 | $ 36,417,000,000 | $ 29,106,000,000 | ||||||||
| Long-Lived Assets | [2] | 50,722,000,000 | 55,038,000,000 | 55,273,000,000 | ||||||||
| U.S. | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 21,159,000,000 | 22,740,000,000 | 17,204,000,000 | ||||||||
| Long-Lived Assets | [2] | 26,566,000,000 | [3] | 26,838,000,000 | 23,623,000,000 | |||||||
| U.S. | Net Property Plant and Equipment | ||||||||||||
| Geographic Information | ||||||||||||
| Long-Lived Assets | 426,000,000 | |||||||||||
| Australia and Timor-Leste | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 1,647,000,000 | 1,798,000,000 | 1,448,000,000 | ||||||||
| Long-Lived Assets | [2] | 7,228,000,000 | [4] | 9,301,000,000 | 9,657,000,000 | |||||||
| Australia and Timor-Leste | Net Property Plant and Equipment | ||||||||||||
| Geographic Information | ||||||||||||
| Long-Lived Assets | 1,236,000,000 | |||||||||||
| Canada [Member] | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 1,769,000,000 | 2,024,000,000 | 2,619,000,000 | ||||||||
| Long-Lived Assets | [2] | 5,769,000,000 | 5,333,000,000 | 5,613,000,000 | ||||||||
| CHINA | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 772,000,000 | 836,000,000 | 712,000,000 | ||||||||
| Long-Lived Assets | [2] | 1,447,000,000 | 1,380,000,000 | 1,275,000,000 | ||||||||
| INDONESIA | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 875,000,000 | 886,000,000 | 757,000,000 | ||||||||
| Long-Lived Assets | [2] | 605,000,000 | 669,000,000 | 758,000,000 | ||||||||
| Libya | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 1,103,000,000 | 1,142,000,000 | 586,000,000 | ||||||||
| Long-Lived Assets | [2] | 668,000,000 | 679,000,000 | 699,000,000 | ||||||||
| MALAYSIA | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 1,230,000,000 | 1,346,000,000 | 1,103,000,000 | ||||||||
| Long-Lived Assets | [2] | 1,871,000,000 | 2,327,000,000 | 2,736,000,000 | ||||||||
| NORWAY | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 2,349,000,000 | 2,886,000,000 | 2,348,000,000 | ||||||||
| Long-Lived Assets | [2] | 5,258,000,000 | 5,582,000,000 | 6,154,000,000 | ||||||||
| UNITED KINGDOM | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 1,649,000,000 | 2,606,000,000 | 2,248,000,000 | ||||||||
| Long-Lived Assets | [2] | 2,000,000 | 1,583,000,000 | 3,335,000,000 | ||||||||
| Segment Geographical Groups of Countries Other [Member] | ||||||||||||
| Geographic Information | ||||||||||||
| Revenue from contracts with customers | [1] | 14,000,000 | 153,000,000 | 81,000,000 | ||||||||
| Long-Lived Assets | [2] | $ 1,308,000,000 | $ 1,346,000,000 | $ 1,423,000,000 | ||||||||
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