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PROPERTY: (Tables)

12 Months Ended

Dec. 31, 2015

PROPERTY:

Schedule of major classes of property, plant and equipment

		At December 31,
(in millions)		2015			2014
Buildings and equipment		$	11,529.4		$	9,754.0
Construction in progress		1,449.6			2,175.6
Mine development		265.9			255.0
Mineral assets		93.0			—
Land, other than mineral		118.4			100.1
Total property		13,456.3			12,284.7
Accumulated depreciation, amortization and depletion		(5,193.5		)	(4,848.3		)
Total property and mine development, net		$	8,262.8		$	7,436.4

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- References

No definition available.

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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://www.xbrl.org/2003/role/presentationRef
-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=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 13
-Subparagraph b
-Article 5

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