Trust Investments - Amortized Costs Basis, Gross Unrealized Gains And Fair Value Losses For The Securities Held (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024		Sep. 30, 2024		Dec. 31, 2023
Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Trust Investments, Cost	$ 2,304	[1]	$ 2,304	[1]	$ 2,219	[2]
Gross Unrealized Gains	562	[1]	562	[1]	428	[2]
Gross Unrealized Losses	(99)	[1]	(99)	[1]	(124)	[2]
Trust Investments, Fair Value	2,767	[1]	2,767	[1]	2,523	[2]
NDT Fund Foreign Currency	32		32		1
Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Trust Investments, Cost	190		190		200
Gross Unrealized Gains	10		10		8
Gross Unrealized Losses	(25)		(25)		(29)
Trust Investments, Fair Value	175		175		179
Total Debt Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1,380		1,380		1,314
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	18		18		10
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(86)		(86)		(111)
Debt Securities, Available-for-Sale, Fair Value	1,312		1,312		1,213
Total Debt Securities [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	181		181		190
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(25)		(25)		(29)
Debt Securities, Available-for-Sale, Fair Value	156		156		161
Equity Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Equity Securities, Cost	924		924		905
Equity Securities, Accumulated Gross Unrealized Gain			544		418
Equity Securities, FV-NI, Unrealized Loss			(13)		(13)
Equity Securities, Fair Value	1,455		1,455		1,310
Unrealized Gains (Losses) on Equity Securities still held	86		168
Equity Securities [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Unrealized Gains (Losses) on Equity Securities still held	1		1
Corporate Debt Obligations [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	558		558		555
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	9		9		6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(25)		(25)		(39)
Debt Securities, Available-for-Sale, Fair Value	542		542		522
Corporate Debt Obligations [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	77		77		80
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(8)		(8)		(10)
Debt Securities, Available-for-Sale, Fair Value	69		69		70
Government Debt Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	822		822		759
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	9		9		4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(61)		(61)		(72)
Debt Securities, Available-for-Sale, Fair Value	770		770		691
Government Debt Securities [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	104		104		110
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0		0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(17)		(17)		(19)
Debt Securities, Available-for-Sale, Fair Value	87		87		91
International Equity Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Equity Securities, Cost	418		418		423
Equity Securities, Accumulated Gross Unrealized Gain			137		118
Equity Securities, FV-NI, Unrealized Loss			(11)		(11)
Equity Securities, Fair Value	544		544		530
Domestic Equity Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Equity Securities, Cost	506		506		482
Equity Securities, Accumulated Gross Unrealized Gain			407		300
Equity Securities, FV-NI, Unrealized Loss			(2)		(2)
Equity Securities, Fair Value	911		911		780
Domestic Equity Securities [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Equity Securities, Cost	9		9		10
Equity Securities, Accumulated Gross Unrealized Gain			10		8
Equity Securities, FV-NI, Unrealized Loss			0		0
Equity Securities, Fair Value	$ 19		19		$ 18
Debt Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
After tax amount of net unrealized gains (losses) recognized in AOCI			(40)
Debt Securities [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
After tax amount of net unrealized gains (losses) recognized in AOCI			$ (18)

[1] The NDT Fund Investments table excludes cash and foreign currency of $32 million as of September 30, 2024, which is part of the NDT Fund.

[2] The NDT Fund Investments table excludes cash and foreign currency of $1 million as of December 31, 2023, which is part of the NDT Fund.