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Fair Value Measurements (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Oil and Gas segment |  |  |
Liabilities: |  |  |
Impairment and related charges | $ 285 | $ 285 |
ISSD |  |  |
Liabilities: |  |  |
Impairment and related charges | 40 | 41 |
Qatar ISND and ISSD |  |  |
Liabilities: |  |  |
Impairment and related charges |  |  | $ 416
Total Fair Value |  |  |
Liabilities: |  |  |
Estimated fair value of debt | 47,800 | 47,800 | 10,300
Total Fair Value | WES Midstream |  |  |
Liabilities: |  |  |
Estimated fair value of debt | 7,600 | 7,600 |
Level 2 | Total Fair Value |  |  |
Liabilities: |  |  |
Estimated fair value of debt | 12,500 | 12,500 |
Recurring | Accrued liabilities |  |  |
Liabilities: |  |  |
Netting and Collateral | 0 | 0 | 0
Recurring | Accrued liabilities | Total Fair Value |  |  |
Liabilities: |  |  |
Embedded derivatives | 54 | 54 | 66
Recurring | Accrued liabilities | Level 1 |  |  |
Liabilities: |  |  |
Embedded derivatives | 0 | 0 | 0
Recurring | Accrued liabilities | Level 2 |  |  |
Liabilities: |  |  |
Embedded derivatives | 54 | 54 | 66
Recurring | Accrued liabilities | Level 3 |  |  |
Liabilities: |  |  |
Embedded derivatives | 0 | 0 | 0
Recurring | Deferred credits and other liabilities - other |  |  |
Liabilities: |  |  |
Netting and Collateral | 0 | 0 | 0
Recurring | Deferred credits and other liabilities - other | Total Fair Value |  |  |
Liabilities: |  |  |
Embedded derivatives | 73 | 73 | 116
Recurring | Deferred credits and other liabilities - other | Level 1 |  |  |
Liabilities: |  |  |
Embedded derivatives | 0 | 0 | 0
Recurring | Deferred credits and other liabilities - other | Level 2 |  |  |
Liabilities: |  |  |
Embedded derivatives | 73 | 73 | 116
Recurring | Deferred credits and other liabilities - other | Level 3 |  |  |
Liabilities: |  |  |
Embedded derivatives | $ 0 | $ 0 | $ 0
Non recurring | Measurement Input, Discount Rate |  |  |
Liabilities: |  |  |
Risk adjusted discount rate |  |  | 0.10

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