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Drilling Fleet (Disposal) (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 USD ($) item | Mar. 31, 2019 USD ($) | Dec. 31, 2019 USD ($)
Dispositions |  |  |
Number of mobile offshore drilling units | item | 41 |  |
Net cash proceeds from sale of assets | $ 1 | $ 12 |
Gain (loss) on the sale of assets | (1) | $ 7 |
Assets held for sale, included in other current assets | 5 |  | $ 0
Assets sold, not discontinued operations | Rig sales |  |  |
Dispositions |  |  |
Net cash proceeds from sale of assets | 11 |  |
Gain (loss) on the sale of assets | 1 |  |
Gain (loss) on disposal of assets, tax effect | 0 |  |
Assets sold, not discontinued operations | Other property and equipment |  |  |
Dispositions |  |  |
Net cash proceeds from sale of assets | 1 |  |
Gain (loss) on the sale of assets | $ (6) |  |

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