Balance Sheet Components Electric Utility Plant, Net (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Electric utility plant	$ 13,045		$ 12,421
Construction work-in-progress	709		467
Total cost	13,754		12,888
Less: accumulated depreciation and amortization	(4,676)		(4,423)
Electric utility plant, net	9,078		$ 8,465
Amortization of Intangible Assets	$ 16	$ 15

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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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.

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

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Period end amount of total net PPE.

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Period end amount of total gross PPE.

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