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Property, Plant, and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of property, plant, and equipment

Property, plant, and equipment consisted of the following utility and non-utility and other assets at December 31:

(in millions)		2017				2016
Utility property, plant, and equipment		$	23,646.7			$	24,185.1
Less: Accumulated depreciation		7,021.8				7,609.7
Net		16,624.9				16,575.4
CWIP		508.2				320.0
Plant to be retired, net		930.6				—
Net utility property, plant, and equipment		18,063.7				16,895.4
Non-utility and other property, plant, and equipment		3,797.2				3,520.3
Less: Accumulated depreciation		671.3				604.9
Net		3,125.9				2,915.4
CWIP		157.4				104.7
Net non-utility and other property, plant, and equipment		3,283.3				3,020.1
Total property, plant, and equipment		$	21,347.0			$	19,915.5

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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 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: 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

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