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Non-Mineral Leases - End Notes (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Property, Plant and Equipment, Net | $ 42,269,000,000 | $ 45,698,000,000
Co Venturer Member |  |
Short-term Lease Commitment, Amount | 31,000,000 |
Short Term Lease Commitment Lease Not Commenced | 18,000,000 |
Property plant equipment | Co Venturer Member |  |
Property, Plant and Equipment, Net | 335,000,000 |
Finance Lease, Liability, Current | $ 56,000,000 |
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Debt, Current |
Finance Lease, Liability, Noncurrent | $ 579,000,000 |
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Long-term Debt and Capital Lease Obligations |

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