Property, Plant and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2018

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



		As of
	Depreciable	September 30,			December 31,
	Life	2018			2017
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	75,751		$	74,660
Interstate natural gas pipeline assets	3-80 years	7,295			7,176
		83,046			81,836
Accumulated depreciation and amortization		(25,566		)	(24,478		)
Regulated assets, net		57,480			57,358

Nonregulated assets:
Independent power plants	5-30 years	6,551			6,010
Other assets	3-30 years	1,605			1,489
		8,156			7,499
Accumulated depreciation and amortization		(1,773		)	(1,542		)
Nonregulated assets, net		6,383			5,957

Net operating assets		63,863			63,315
Construction work-in-progress		3,724			2,556
Property, plant and equipment, net		$	67,587		$	65,871

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



		As of
		September 30,			December 31,
	Depreciable Life	2018			2017
Utility plant in service, net:
Generation	20-70 years	$	12,500		$	12,107
Transmission	52-75 years	1,870			1,838
Electric distribution	20-75 years	3,519			3,380
Natural gas distribution	29-75 years	1,694			1,640
Utility plant in service		19,583			18,965
Accumulated depreciation and amortization		(5,850		)	(5,561		)
Utility plant in service, net		13,733			13,404
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		13,739			13,410
Construction work-in-progress		1,494			797
Property, plant and equipment, net		$	15,233		$	14,207

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



		As of
		September 30,			December 31,
	Depreciable Life	2018			2017
Utility Plant:
Utility plant in-service	5-75 years	$	28,201		$	27,880
Accumulated depreciation and amortization		(9,750		)	(9,366		)
Utility plant in-service, net		18,451			18,514
Other non-regulated, net of accumulated depreciation and amortization	45 years	10			11
Plant, net		18,461			18,525
Construction work-in-progress		877			678
Property, plant and equipment, net		$	19,338		$	19,203

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



		As of
	Depreciable Life	September 30,			December 31,
	Depreciable Life	2018			2017
Utility plant:
Generation	30 - 55 years	$	3,702		$	3,707
Distribution	20 - 65 years	3,373			3,314
Transmission	45 - 70 years	1,864			1,860
General and intangible plant	5 - 65 years	820			793
Utility plant		9,759			9,674
Accumulated depreciation and amortization		(3,026		)	(2,871		)
Utility plant, net		6,733			6,803
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,734			6,804
Construction work-in-progress		96			73
Property, plant and equipment, net		$	6,830		$	6,877

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



		As of
	Depreciable Life	September 30,			December 31,
	Depreciable Life	2018			2017
Utility plant:
Electric generation	25 - 60 years	$	1,144		$	1,144
Electric distribution	20 - 100 years	1,518			1,459
Electric transmission	50 - 100 years	817			786
Electric general and intangible plant	5 - 70 years	191			181
Natural gas distribution	35 - 70 years	398			390
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	305			294
Utility plant		4,387			4,268
Accumulated depreciation and amortization		(1,573		)	(1,513		)
Utility plant, net		2,814			2,755
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,819			2,760
Construction work-in-progress		119			132
Property, plant and equipment, net		$	2,938		$	2,892