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PROPERTY, PLANT AND EQUIPMENT | 3 Months Ended
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Mar. 31, 2022
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT AND EQUIPMENT | NOTE 6 - PROPERTY, PLANT AND EQUIPMENT The following table indicates the carrying value of each of the major classes of our depreciable assets:
| (In Millions)
| March 31, 2022 |  | December 31, 2021
Land, land improvements and mineral rights | $ | 1,397 |  |  | $ | 1,291 |
Buildings | 907 |  |  | 889 |
Equipment | 8,691 |  |  | 8,709 |
Other | 233 |  |  | 229 |
Construction in progress | 414 |  |  | 408 |
Total property, plant and equipment 1 | 11,642 |  |  | 11,526 |
Allowance for depreciation and depletion | (2,630) |  |  | (2,340) |
Property, plant and equipment, net | $ | 9,012 |  |  | $ | 9,186 |
1 Includes right-of-use assets related to finance leases of $371 million and $411 million as of March 31, 2022 and December 31, 2021, respectively.
We recorded depreciation and depletion expense of $298 million and $215 million for the three months ended March 31, 2022 and 2021, respectively. Depreciation and depletion expense for the three months ended March 31, 2022 includes $68 million of accelerated depreciation related to the indefinite idle of the Indiana Harbor #4 blast furnace.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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