XML 57 R46.htm IDEA: XBRL DOCUMENT v3.25.3

Non-Derivative Fair Value Measurements (Details) - USD ($)
$ in Millions

9 Months Ended

12 Months Ended

Sep. 30, 2025

Dec. 31, 2024

Nuclear decommissinoning fund [Abstract]

Equity investments in unconsolidated subsidiaries

$ 239

$ 246

Miscellaneous investments

165

156

Debt Securities, Available-for-sale, Unrealized Gain

1,700

1,400

Debt Securities, Available-for-sale, Unrealized Loss

44

49

Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]

Due in one year or less

9

Due in 1 to 5 years

341

Due in 5 to 10 years

271

Due after 10 years

287

Total

908

Debt Securities, Available-for-sale, Unrealized Gain

1,700

1,400

Debt Securities, Available-for-sale, Unrealized Loss

44

49

Fair Value Measured on a Recurring Basis | Cost

Nuclear decommissinoning fund [Abstract]

Decommissioning Fund Investments

2,208

^[1]

2,130

^[2]

Fair Value Measured on a Recurring Basis | Cost | Cash equivalents

Nuclear decommissinoning fund [Abstract]

Cash equivalents

68

^[1]

39

^[2]

Fair Value Measured on a Recurring Basis | Cost | Commingled funds

Nuclear decommissinoning fund [Abstract]

Alternative investment

^[2]

703

Investments, Fair Value Disclosure

^[1]

696

Fair Value Measured on a Recurring Basis | Cost | Debt securities

Nuclear decommissinoning fund [Abstract]

Debt securities

903

^[1]

866

^[2]

Fair Value Measured on a Recurring Basis | Cost | Equity securities

Nuclear decommissinoning fund [Abstract]

Equity Securities, FV-NI

541

^[1]

522

^[2]

Fair Value Measured on a Recurring Basis | Fair Value

Nuclear decommissinoning fund [Abstract]

Alternative investment

1,041

^[1]

1,025

^[2]

Decommissioning Fund Investments

3,869

^[1]

3,494

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Cash equivalents

Nuclear decommissinoning fund [Abstract]

Cash equivalents

68

^[1]

39

^[2]

Alternative investment

0

^[1]

0

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Commingled funds

Nuclear decommissinoning fund [Abstract]

Alternative investment

1,041

^[1]

1,025

^[2]

Investments, Fair Value Disclosure

1,041

Fair Value Measured on a Recurring Basis | Fair Value | Debt securities

Nuclear decommissinoning fund [Abstract]

Debt securities

908

^[1]

846

^[2]

Alternative investment

0

^[1]

0

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Equity securities

Nuclear decommissinoning fund [Abstract]

Equity Securities, FV-NI

1,852

^[1]

1,584

^[2]

Alternative investment

0

^[1]

0

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 1

Nuclear decommissinoning fund [Abstract]

Decommissioning Fund Investments

1,918

^[1]

1,622

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Cash equivalents

Nuclear decommissinoning fund [Abstract]

Cash equivalents

68

^[1]

39

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Commingled funds

Nuclear decommissinoning fund [Abstract]

Alternative investment

^[2]

0

Investments, Fair Value Disclosure

^[1]

0

Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Debt securities

Nuclear decommissinoning fund [Abstract]

Debt securities

0

^[1]

0

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 1 | Equity securities

Nuclear decommissinoning fund [Abstract]

Equity Securities, FV-NI

1,850

^[1]

1,583

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 2

Nuclear decommissinoning fund [Abstract]

Decommissioning Fund Investments

900

^[1]

833

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Cash equivalents

Nuclear decommissinoning fund [Abstract]

Cash equivalents

0

^[1]

0

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Commingled funds

Nuclear decommissinoning fund [Abstract]

Alternative investment

^[2]

0

Investments, Fair Value Disclosure

^[1]

0

Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Debt securities

Nuclear decommissinoning fund [Abstract]

Debt securities

898

^[1]

832

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 2 | Equity securities

Nuclear decommissinoning fund [Abstract]

Equity Securities, FV-NI

2

^[1]

1

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 3

Nuclear decommissinoning fund [Abstract]

Decommissioning Fund Investments

10

^[1]

14

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Cash equivalents

Nuclear decommissinoning fund [Abstract]

Cash equivalents

0

^[1]

0

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Commingled funds

Nuclear decommissinoning fund [Abstract]

Alternative investment

^[2]

0

Investments, Fair Value Disclosure

^[1]

0

Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Debt securities

Nuclear decommissinoning fund [Abstract]

Debt securities

10

^[1]

14

^[2]

Fair Value Measured on a Recurring Basis | Fair Value | Level 3 | Equity securities

Nuclear decommissinoning fund [Abstract]

Equity Securities, FV-NI

$ 0

^[1]

$ 0

^[2]

[1]	Reported in nuclear decommissioning fund and other investments on the consolidated balance sheets, which also includes $239 million of equity method investments and $165 million of rabbi trust assets and other miscellaneous investments.
[2]	Reported in nuclear decommissioning fund and other investments on the consolidated balance sheets, which also includes $246 million of equity method investments and $156 million of rabbi trust assets and other miscellaneous investments.

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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.

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