Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2011

Property Plant And Equipment Disclosure [Abstract]

Schedule of utility property, plant and equipment

Utility property, plant and equipment included on the consolidated balance sheets is composed of the following:



	December 31,
(in millions)	2011			2010
Transmission	$	6,109		$	5,811
Distribution	15,938			14,878
Generation	4,063			3,371
General plant and other	3,951			3,377
Accumulated depreciation	(6,894		)	(6,319		)
	23,167			21,118
Construction work in progress	3,922			3,291
Nuclear fuel, at amortized cost	480			369
Total utility property, plant and equipment	$	27,569		$	24,778

SCE's investment in various projects

The following is SCE's investment in each project as of December 31, 2011:



(in millions)	Plant in Service		Construction Work in Progress		Accumulated Depreciation		Nuclear Fuel (at amortized cost)		Net Book Value		Ownership Interest
Transmission systems:
Eldorado	$	71	$	4	$	13	$	—	$	62	60%
Pacific Intertie	189		2		68		—		123		50%
Generating stations:
Four Corners Units 4 and 5 (coal)	589		17		519		—		87		48%
Mohave (coal)	327		24		287		—		64		56%
Palo Verde (nuclear)	1,803		54		1,465		138		530		16%
San Onofre (nuclear)	5,198		370		4,111		342		1,799		78%
Total	$	8,177	$	471	$	6,463	$	480	$	2,665

Schedule of competitive power generation and other property included on the consolidated balance sheets

Competitive power generation and other property included on the consolidated balance sheets was composed of the plant and related facilities of EMG:



	December 31,
(in millions)	2011			2010
Building, plant and equipment	$	4,708		$	4,572
Emission allowances	672			1,305
Leasehold improvements	4			177
Furniture and equipment	130			97
Land (including easements)	64			84
Construction work in progress¹	377			1,036
	5,955			7,271
Accumulated depreciation	(1,408		)	(1,865		)
Competitive power generation and other property – net	$	4,547		$	5,406


¹	Construction work in progress consisted of $357 million and $888 million at December 31, 2011 and 2010, respectively, for new gas and wind projects under construction.

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tabular disclosure of proportionate interests in jointly owned utility plants. Includes the amount of plants in service, the accumulated provision for depreciation (if available), the amount of plants under construction, and the proportionate share. The amounts presented may be further subdivided to show amounts applicable to plant subcategories (for example, production, transmission, distribution). Includes statements that the amounts represent the utility's share in each joint plant and that it must provide its own financing. Information concerning two or more generating plants on the same site may be combined. States that the utility's share of direct expenses of the joint plants is included in the corresponding operating expenses on its income statement (for example, fuel, maintenance of plant, other operating expense). If the share of direct expenses is charged to purchased power, then disclose the amount so charged and the proportionate amounts charged to specific operating expenses on the records maintained for the joint plants.

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