Non-Mineral Leases - Other Info (Details) $ in Millions |
12 Months Ended |
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Dec. 31, 2019
USD ($)
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| Leases [Abstract] | |
| Operating lease cost | $ 341 |
| Amortization of right-of-use assets | 99 |
| Interest on lease liabilities | 37 |
| Short-term Lease Cost | 77 |
| Lease Cost Total | $ 554 |
| Weighted-average term (years) - Operating Leases | 5 years 2 months 8 days |
| Weighted-average term (years) - Finance Leases | 8 years 8 months 12 days |
| Weighted Average Discount Rate (Percent) - Operating Leases | 3.10% |
| Weighted Average Discount Rate (Percent) - Finance Leases | 5.53% |
| Cash Flow, Operating Activities, Lessee [Abstract] | |
| Operating cash flows from operating leases | $ 203 |
| Operating cash flows from finance leases | 27 |
| Financing cash flows from finance leases | 81 |
| Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 499 |
| Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | $ 26 |
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- References No definition available.
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- Definition Amount of interest expense on finance lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of interest paid on finance lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of cash outflow for principal payment on finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average discount rate for finance lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease cost recognized by lessee for lease contract. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of operating lease expense. Excludes sublease income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in right-of-use asset obtained in exchange for finance lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of short-term lease cost, excluding expense for lease with term of one month or less. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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