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Balance Sheet Components Electric Utility Plant, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Electric utility plant	$ 12,868		$ 12,868		$ 12,421
Construction work-in-progress	568		568		467
Total cost	13,436		13,436		12,888
Less: accumulated depreciation and amortization	(4,595)		(4,595)		(4,423)
Electric utility plant, net	8,841		8,841		$ 8,465
Amortization of Intangible Assets	$ 15	$ 14	$ 29	$ 29

X

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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X

- Definition

Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(8))
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility.

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No definition available.

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- Definition

Period end amount of construction work in progress in public utility.

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- Definition

Period end amount of total net PPE.

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- Definition

Period end amount of total gross PPE.

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