Non-Mineral Leases (Lease Term and Discount Rate) (Details) |
Dec. 31, 2021 |
Dec. 31, 2020 |
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| Non-Mineral Leases [Abstract] | ||
| Weighted-average term (years): Operating leases | 5 years 11 months 19 days | 6 years 1 month 9 days |
| Weighted-average term (years): Finance leases | 7 years 5 months 26 days | 7 years 1 month 13 days |
| Weighted-average discount rate (percent): Operating leases | 2.66% | 2.78% |
| Weighted-average discount rate (percent): Finance leases | 3.24% | 4.27% |
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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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- References No definition available.
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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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