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PROPERTY, PLANT AND EQUIPMENT (Tables) | 9 Months Ended
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Sep. 30, 2021
Property, Plant and Equipment [Abstract] |
Value Of Each Of The Major Classes Of Consolidated Depreciable Assets | The following table indicates the carrying value of each of the major classes of our depreciable assets:
| (In Millions)
| September 30, 2021 |  | December 31, 2020
Land, land improvements and mineral rights | $ | 1,285 |  |  | $ | 1,213 |
Buildings | 852 |  |  | 703 |
Equipment | 8,334 |  |  | 6,786 |
Other | 213 |  |  | 151 |
Construction in progress | 417 |  |  | 1,364 |
Total property, plant and equipment 1 | 11,101 |  |  | 10,217 |
Allowance for depreciation and depletion | (2,127) |  |  | (1,474) |
Property, plant and equipment, net | $ | 8,974 |  |  | $ | 8,743 |
1 Includes right-of-use assets related to finance leases of $396 million and $361 million as of September 30, 2021 and December 31, 2020, respectively.

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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