Property, Plant and Equipment, Net (Tables)

3 Months Ended

Mar. 31, 2019

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



		As of
	Depreciable	March 31,			December 31,
	Life	2019			2018
Regulated assets:
Utility generation, transmission and distribution systems	5-80 years	$	77,659		$	76,707
Interstate natural gas pipeline assets	3-80 years	7,547			7,524
		85,206			84,231
Accumulated depreciation and amortization		(26,253		)	(25,894		)
Regulated assets, net		58,953			58,337

Nonregulated assets:
Independent power plants	5-30 years	6,844			6,826
Other assets	3-30 years	1,474			1,424
		8,318			8,250
Accumulated depreciation and amortization		(1,711		)	(1,610		)
Nonregulated assets, net		6,607			6,640

Net operating assets		65,560			64,977
Construction work-in-progress		3,388			3,110
Property, plant and equipment, net		$	68,948		$	68,087

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



		As of
		March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant in service, net:
Generation	20-70 years	$	14,092		$	13,727
Transmission	52-75 years	1,946			1,934
Electric distribution	20-75 years	3,732			3,672
Natural gas distribution	29-75 years	1,734			1,724
Utility plant in service		21,504			21,057
Accumulated depreciation and amortization		(6,076		)	(5,941		)
Utility plant in service, net		15,428			15,116
Nonregulated property, net:
Nonregulated property gross	20-50 years	7			7
Accumulated depreciation and amortization		(1		)	(1		)
Nonregulated property, net		6			6
		15,434			15,122
Construction work-in-progress		1,111			1,035
Property, plant and equipment, net		$	16,545		$	16,157



		As of
		March 31,			December 31,
	Depreciable Life	2019			2018
Utility Plant:
Utility plant in-service	5-75 years	$	28,455		$	28,399
Accumulated depreciation and amortization		(10,105		)	(10,034		)
Utility plant in-service, net		18,350			18,365
Other non-regulated, net of accumulated depreciation and amortization	47 years	10			10
Plant, net		18,360			18,375
Construction work-in-progress		1,338			1,195
Property, plant and equipment, net		$	19,698		$	19,570

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Generation	30 - 55 years	$	3,725		$	3,720
Distribution	20 - 65 years	3,436			3,411
Transmission	45 - 70 years	1,441			1,439
General and intangible plant	5 - 65 years	710			716
Utility plant		9,312			9,286
Accumulated depreciation and amortization		(2,995		)	(2,966		)
Utility plant, net		6,317			6,320
Other non-regulated, net of accumulated depreciation and amortization	45 years	1			1
Plant, net		6,318			6,321
Construction work-in-progress		125			97
Property, plant and equipment, net		$	6,443		$	6,418

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



		As of
	Depreciable Life	March 31,			December 31,
	Depreciable Life	2019			2018
Utility plant:
Electric generation	25 - 60 years	$	1,132		$	1,132
Electric distribution	20 - 100 years	1,588			1,568
Electric transmission	50 - 100 years	818			812
Electric general and intangible plant	5 - 70 years	174			185
Natural gas distribution	35 - 70 years	405			403
Natural gas general and intangible plant	5 - 70 years	14			14
Common general	5 - 70 years	318			321
Utility plant		4,449			4,435
Accumulated depreciation and amortization		(1,585		)	(1,583		)
Utility plant, net		2,864			2,852
Other non-regulated, net of accumulated depreciation and amortization	70 years	5			5
Plant, net		2,869			2,857
Construction work-in-progress		96			90
Property, plant and equipment, net		$	2,965		$	2,947