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PROPERTY:

12 Months Ended

Dec. 31, 2020

PROPERTY:

PROPERTY:

NOTE 5—PROPERTY:

​

​	​	​	​	​	​	​
​	​	At December 31,
(in millions)		2020			2019
Buildings and equipment	​	$	15,561.9	​	$	15,016.1
Construction in progress	​		1,481.6	​		1,294.8
Mine development	​		272.8	​		267.5
Mineral assets	​	​	83.2	​	​	83.2
Land, other than mineral	​		235.8	​		200.1
Total property	​		17,635.3	​		16,861.7
Accumulated depreciation, amortization and depletion	​		(8,176.6)	​		(7,490.7)
Total property and mine development, net	​	$	9,458.7	​	$	9,371.0

​

Depreciation and depletion expense for the years ended December 31, 2020, 2019 and 2018, amounted to $766.4 million, $759.9 million and $668.9 million, respectively.

X

- References

No definition available.

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X

- 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

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