PROPERTY, PLANT AND EQUIPMENT (Book Value of Land and Mineral Rights Disclosure) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Mineral rights:
Cost	$ 780	$ 773
Depletion	(187)	(142)
Net mineral rights	593	631
Land rights	$ 406	$ 361

Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.

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The accumulated decrease in the carrying value of the mineral properties as a result of mine or mineral production.

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Carrying amount at the balance sheet date of mineral properties, gross of adjustments.

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Mineral properties, net of adjustments.

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