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Balance Sheet Components Electric Utility Plant, Net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Electric utility plant	$ 15,762	$ 15,762		$ 14,863
Construction work-in-progress	422	422		567
Total cost	16,184	16,184		15,430
Less: accumulated depreciation and amortization	(5,380)	(5,380)		(5,085)
Electric utility plant, net	10,804	10,804		$ 10,345
Amortization of Intangible Assets	$ 19	$ 57	$ 55

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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.

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