Trust Investments - Schedule of Amount Available-For-Sale Debt Securities By Maturity Periods (Details) $ in Millions	Dec. 31, 2024 USD ($)
Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Total Available-for-Sale Debt Securities	$ 1,266
Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Total Available-for-Sale Debt Securities	148
Debt Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member]
Schedule of Trust Investments [Line Items]
Less than one year	17
1 - 5 years	358
6 - 10 years	215
11 - 15 years	64
16 - 20 years	109
Over 20 years	503
Debt Securities [Member] | Rabbi Trust [Member]
Schedule of Trust Investments [Line Items]
Less than one year	4
1 - 5 years	30
6 - 10 years	16
11 - 15 years	10
16 - 20 years	15
Over 20 years	$ 73