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PROPERTY, PLANT AND EQUIPMENT (Notes) | 6 Months Ended
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Jun. 30, 2020
Property, Plant and Equipment [Abstract] |
PROPERTY, PLANT AND EQUIPMENT | The following table indicates the carrying value of each of the major classes of our depreciable assets:
| (In Millions)
| June 30, 2020 |  | December 31, 2019
Land, land improvements and mineral rights | $ | 653.2 |  |  | $ | 582.2 |
Buildings | 454.4 |  |  | 157.8 |
Steel and Manufacturing equipment | 2,147.9 |  |  | 42.0 |
Mining and Pelletizing equipment | 1,448.6 |  |  | 1,413.6 |
Other | 123.4 |  |  | 101.5 |
Construction-in-progress | 1,058.3 |  |  | 730.3 |
Total property, plant and equipment 1 | 5,885.8 |  |  | 3,027.4 |
Allowance for depreciation and depletion | (1,337.9 | ) |  | (1,098.4 | )
Property, plant and equipment, net | $ | 4,547.9 |  |  | $ | 1,929.0 |
1 Includes right-of-use assets related to finance leases of $93.7 million and $49.0 million as of June 30, 2020 and December 31, 2019, respectively. We recorded capitalized interest into property, plant and equipment of $13.6 million and $23.3 million during the three and six months ended June 30, 2020, respectively, and $5.9 million and $9.9 million for the three and six months ended June 30, 2019, respectively. We recorded depreciation and depletion expense of $75.3 million and $110.7 million for the three and six months ended June 30, 2020, respectively, and $20.9 million and $40.5 million for the three and six months ended June 30, 2019, respectively.

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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 + Details
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