Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant, and Equipment

SCE's property, plant and equipment included in the consolidated balance sheets is composed of the following:

	December 31,
(in millions)	2017			2016
Distribution	$	23,633		$	22,332
Transmission	13,127			12,549
Generation	3,468			3,376
General plant and other	4,534			4,633
Accumulated depreciation	(9,355		)	(9,000		)
	35,407			33,890
Construction work in progress	3,175			2,790
Nuclear fuel, at amortized cost	126			126
Total utility property, plant and equipment	$	38,708		$	36,806

Schedule of Jointly Owned Utility Projects

The following is SCE's investment in each asset as of December 31, 2017:

(in millions)	Plant in Service		Construction Work in Progress		Accumulated Depreciation		Nuclear Fuel (at amortized cost)		Net Book Value		Ownership Interest
Transmission systems:
Eldorado	$	237	$	14	$	24	$	—	$	227	59	%
Pacific Intertie	192		41		78		—		155		50	%
Generating station:
Palo Verde (nuclear)	2,001		52		1,557		126		622		16	%
Total	$	2,430	$	107	$	1,659	$	126	$	1,004