Supplementary Financial Information - Schedule of Other Nonoperating Income (Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
NDT net income	$ 170	$ 0	$ 0
Insurance settlements	23	24	70
Gain on sale of land	0	95	8
Interest income	65	86	19
All other	38	23	20
Total other income	312	257	117
All other	21	14	4
Total other deductions	21	14	4
Operating Segments
Finite-Lived Intangible Assets [Line Items]
Gain on sale of land	6	95	8
Gain on TRA settlement	10	29	0
Operating Segments | Texas
Finite-Lived Intangible Assets [Line Items]
Insurance settlements	20		62
Gain on sale of land		1
Operating Segments | West
Finite-Lived Intangible Assets [Line Items]
Insurance settlements	$ 3	19	6
Operating Segments | Asset Closure
Finite-Lived Intangible Assets [Line Items]
Insurance settlements		5	1
Gain on sale of land		$ 94
Operating Segments | Corporate Segment and Other Non - Segment
Finite-Lived Intangible Assets [Line Items]
Insurance settlements			$ 1