PROPERTY, PLANT AND EQUIPMENT (Book Value of Land and Mineral Rights Disclosure) (Details) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Mineral rights: | Ìý | Ìý |
| Mineral Properties, Gross | $ 773 | $ 537 |
| Mineral Properties, Accumulated Depletion | (142) | (134) |
| Mineral Properties, Net | 631 | 403 |
| Land Rights | $ 361 | $ 12 |
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- Definition Amount before accumulated depletion of real estate held for productive use, excluding land held for sale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The accumulated decrease in the carrying value of the mineral properties as a result of mine or mineral production. No definition available.
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- Definition Carrying amount at the balance sheet date of mineral properties, gross of adjustments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Mineral properties, net of adjustments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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