Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2017

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable	March 31,			December 31,
	Life	2017			2016
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	71,308		$	71,536
Interstate natural gas pipeline assets	3-80 years	6,944			6,942
		78,252			78,478
Accumulated depreciation and amortization		(23,515		)	(23,603		)
Regulated assets, net		54,737			54,875

Nonregulated assets:
Independent power plants	5-30 years	5,856			5,594
Other assets	3-30 years	1,081			1,002
		6,937			6,596
Accumulated depreciation and amortization		(1,136		)	(1,060		)
Nonregulated assets, net		5,801			5,536

Net operating assets		60,538			60,411
Construction work-in-progress		2,350			2,098
Property, plant and equipment, net		$	62,888		$	62,509

Property, plant and equipment, net consists of the following (in millions):



		As of
		March 31,			December 31,
	Depreciable Life	2017			2016
Utility plant in service, net:
Generation	20-70 years	$	11,317		$	11,282
Transmission	52-75 years	1,767			1,726
Electric distribution	20-75 years	3,216			3,197
Gas distribution	28-70 years	1,574			1,565
Utility plant in service		17,874			17,770
Accumulated depreciation and amortization		(5,581		)	(5,448		)
Utility plant in service, net		12,293			12,322
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		12,299			12,328
Construction work-in-progress		564			493
Property, plant and equipment, net		$	12,863		$	12,821

Property, plant and equipment, net consists of the following (in millions):



		As of
		March 31,			December 31,
	Depreciable Life	2017			2016

Property, plant and equipment in-service	5-75 years	$	27,341		$	27,298
Accumulated depreciation and amortization		(8,927		)	(8,793		)
Net property, plant and equipment in-service		18,414			18,505
Construction work-in-progress		716			657
Total property, plant and equipment, net		$	19,130		$	19,162

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2017			2016
Utility plant:
Generation	30 - 55 years	$	3,583		$	4,271
Distribution	20 - 65 years	3,248			3,231
Transmission	45 - 65 years	1,860			1,846
General and intangible plant	5 - 65 years	764			738
Utility plant		9,455			10,086
Accumulated depreciation and amortization		(2,715		)	(3,205		)
Utility plant, net		6,740			6,881
Other non-regulated, net of accumulated depreciation and amortization	45 years	3			2
Plant, net		6,743			6,883
Construction work-in-progress		91			114
Property, plant and equipment, net		$	6,834		$	6,997

Property, plant and equipment, net consists of the following (in millions):



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2017			2016
Utility plant:
Electric generation	25 - 60 years	$	1,139		$	1,137
Electric distribution	20 - 100 years	1,423			1,417
Electric transmission	50 - 100 years	772			771
Electric general and intangible plant	5 - 70 years	173			164
Natural gas distribution	35 - 70 years	383			381
Natural gas general and intangible plant	5 - 70 years	15			15
Common general	5 - 70 years	280			267
Utility plant		4,185			4,152
Accumulated depreciation and amortization		(1,460		)	(1,442		)
Utility plant, net		2,725			2,710
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,730			2,715
Construction work-in-progress		97			107
Property, plant and equipment, net		$	2,827		$	2,822