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Property, Plant and Equipment | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Property Plant And Equipment | PROPERTY, PLANT AND EQUIPMENT Property, plant and equipment consist of the following:
| December 31,
(in millions) | 2020 |  | 2019
Land | $ | 325.7 |  |  | $ | 340.3 |
Mineral properties and rights | 5,035.2 |  |  | 4,979.2 |
Buildings and leasehold improvements | 3,306.2 |  |  | 3,108.7 |
Machinery and equipment | 9,846.9 |  |  | 9,294.1 |
Construction in-progress | 1,447.1 |  |  | 1,259.7 |
| 19,961.1 |  |  | 18,982.0 |
Less: accumulated depreciation and depletion | 8,106.8 |  |  | 7,292.0 |
| $ | 11,854.3 |  |  | $ | 11,690.0 |
Depreciation and depletion expense was $846.4 million, $877.6 million and $878.2 million for 2020, 2019 and 2018, respectively. Capitalized interest on major construction projects was $33.3 million, $28.5 million and $22.1 million for 2020, 2019 and 2018.

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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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