Trust Investments - Schedule of Amount Available-For-Sale Debt Securities By Maturity Periods (Details) $ in Millions |
Mar. 31, 2026
USD ($)
|
|---|---|
| Nuclear Decommissioning Trust (NDT) Fund [Member] | |
| Schedule of Trust Investments [Line Items] | |
| Total Available-for-Sale Debt Securities | $ 1,364 |
| Rabbi Trust [Member] | |
| Schedule of Trust Investments [Line Items] | |
| Total Available-for-Sale Debt Securities | 141 |
| Debt Securities [Member] | Nuclear Decommissioning Trust (NDT) Fund [Member] | |
| Schedule of Trust Investments [Line Items] | |
| Less than one year | 26 |
| 1 - 5 years | 355 |
| 6 - 10 years | 264 |
| 11 - 15 years | 74 |
| 16 - 20 years | 122 |
| Over 20 years | 523 |
| Debt Securities [Member] | Rabbi Trust [Member] | |
| Schedule of Trust Investments [Line Items] | |
| Less than one year | 4 |
| 1 - 5 years | 29 |
| 6 - 10 years | 19 |
| 11 - 15 years | 11 |
| 16 - 20 years | 16 |
| Over 20 years | $ 62 |
| X | ||||||||||
- Definition Available For Sale Securities Debt Maturities After Fifteen Through Twenty Years Fair Value No definition available.
|
| X | ||||||||||
- Definition Available For Sale Securities Debt Maturities After Ten Through Fifteen Years Fair Value No definition available.
|
| X | ||||||||||
- Definition Available For Sale Securities Debt Maturities After Twenty Years Fair Value No definition available.
|
| X | ||||||||||
- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|