Nuclear Decommissioning Trust Funds - Schedule of Unrealized Gain (Loss) on Nuclear Decommissioning Trust Funds (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
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| Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] | ||
| Cash equivalents, Amortized Cost | $ 122 | $ 328 |
| Cash equivalents, Fair Value | 14 | 3 |
| Fair value of equity | 513 | 509 |
| Equity securities, Unrealized Gains | 680 | 651 |
| Equity securities, Unrealized Losses | (47) | (55) |
| Equity securities, Fair Value | 1,146 | 1,105 |
| Debt securities, Amortized Cost | 615 | 615 |
| Debt securities, Unrealized Gains | 7 | 3 |
| Debt securities, Unrealized Losses | (5) | (7) |
| Debt securities | 617 | 611 |
| Receivables (payables), net, Amortized Cost | 13 | 5 |
| Receivables (payables), net, Fair Value | 13 | 5 |
| Amortized Cost | 1,155 | 1,132 |
| Unrealized Gains | 687 | 654 |
| Unrealized Losses | (52) | (62) |
| NDT funds | 1,790 | 1,724 |
| Cash equivalents | ||
| Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] | ||
| Cash equivalents, Amortized Cost | 14 | 3 |
| Cash equivalents, Fair Value | $ 14 | $ 3 |
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- Definition Decommissioning Fund Investments, Accumulated Gross Unrealized Gain, Before Tax No definition available.
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- Definition Decommissioning Fund Investments, Accumulated Gross Unrealized Loss, Before Tax No definition available.
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- Definition Decommissioning Fund Investments, Amortized Cost No definition available.
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- Definition Equity Securities, FV-NI, Accumulated Gross Unrealized Gain, Before Tax No definition available.
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- Definition Equity Securities, FV-NI, Accumulated Gross Unrealized Loss, Before Tax No definition available.
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- Definition Receivables (Payables), Net, Amortized Cost No definition available.
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- Definition Receivables (Payables), Net, Fair Value No definition available.
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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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/exampleRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The fair value of investments held in a trust fund to pay for the costs of decontaminating and decommissioning facilities, whether such amount is presented as a separate caption or as a parenthetical disclosure on the balance sheet. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Cost of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investment and investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Details
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