Property, Plant and Equipment, Net (Tables)

9 Months Ended

Sep. 30, 2019

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



		As of
	Depreciable	September 30,			December 31,
	Life	2019			2018
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	78,596		$	76,707
Interstate natural gas pipeline assets	3-80 years	7,637			7,524
		86,233			84,231
Accumulated depreciation and amortization		(26,719		)	(25,894		)
Regulated assets, net		59,514			58,337

Nonregulated assets:
Independent power plants	5-30 years	6,966			6,826
Other assets	3-30 years	1,606			1,424
		8,572			8,250
Accumulated depreciation and amortization		(2,075		)	(1,610		)
Nonregulated assets, net		6,497			6,640

Net operating assets		66,011			64,977
Construction work-in-progress		5,313			3,110
Property, plant and equipment, net		$	71,324		$	68,087

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



		As of
		September 30,			December 31,
	Depreciable Life	2019			2018
Utility plant in service, net:
Generation	20-70 years	$	14,492		$	13,727
Transmission	52-75 years	2,012			1,934
Electric distribution	20-75 years	3,842			3,672
Natural gas distribution	29-75 years	1,776			1,724
Utility plant in service		22,122			21,057
Accumulated depreciation and amortization		(6,347		)	(5,941		)
Utility plant in service, net		15,775			15,116
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		15,781			15,122
Construction work-in-progress		2,039			1,035
Property, plant and equipment, net		$	17,820		$	16,157



		As of
		September 30,			December 31,
	Depreciable Life	2019			2018
Utility Plant:
Generation	14 - 67 years	$	12,574		$	12,606
Transmission	58 - 75 years	6,468			6,357
Distribution	20 - 70 years	7,217			7,030
Intangible plant⁽¹⁾	5 - 75 years	1,002			970
Other	5 - 60 years	1,429			1,436
Utility plant in service		28,690			28,399
Accumulated depreciation and amortization		(10,069		)	(10,034		)
Utility plant in-service, net		18,621			18,365
Other non-regulated, net of accumulated depreciation and amortization	47 years	10			10
Plant, net		18,631			18,375
Construction work-in-progress		1,977			1,195
Property, plant and equipment, net		$	20,608		$	19,570


(1)	Computer software costs included in intangible plant are initially assigned a depreciable life of 5 to 10 years.

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



		As of
	Depreciable Life	September 30,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Generation	30 - 55 years	$	3,730		$	3,720
Distribution	20 - 65 years	3,503			3,411
Transmission	45 - 70 years	1,453			1,439
General and intangible plant	5 - 65 years	718			716
Utility plant		9,404			9,286
Accumulated depreciation and amortization		(3,096		)	(2,966		)
Utility plant, net		6,308			6,320
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,309			6,321
Construction work-in-progress		166			97
Property, plant and equipment, net		$	6,475		$	6,418

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



		As of
	Depreciable Life	September 30,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Electric generation	25 - 60 years	$	1,133		$	1,132
Electric distribution	20 - 100 years	1,657			1,568
Electric transmission	50 - 100 years	831			812
Electric general and intangible plant	5 - 70 years	175			185
Natural gas distribution	35 - 70 years	415			403
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	322			321
Utility plant		4,547			4,435
Accumulated depreciation and amortization		(1,624		)	(1,583		)
Utility plant, net		2,923			2,852
Other non-regulated, net of accumulated depreciation and amortization	70 years	4			5
Plant, net		2,927			2,857
Construction work-in-progress		99			90
Property, plant and equipment, net		$	3,026		$	2,947