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v3.20.1

Property, Plant and Equipment (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2020 USD ($) Rig
Asset Impairments [Abstract] |
Number of rigs evaluated for impairment | Rig | 5
Number of rigs impaired | Rig | 4
Asset impairment charge, after tax and noncontrolling interests | $ | $ 408
Operating Expenses and Other [Member] |
Asset Impairments [Abstract] |
Asset impairment charge | $ | $ 774

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