v3.25.2
Nuclear Decommissioning Trust Funds (Tables)
 6 Months Ended
Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Unrealized Gain (Loss) on Nuclear Decommissioning Trust Funds
June 30, 2025December 31, 2024
Amortized CostUnrealized GainsUnrealized LossesFair ValueAmortized CostUnrealized GainsUnrealized LossesFair Value
Cash equivalents$14 $— $— $14 $3 $— $— $3 
Equity securities513 680 (47)1,146 509 651 (55)1,105 
Debt securities615 7 (5)617 615 3 (7)611 
Receivables (payables), net13 — — 13 5 — — 5 
NDT Funds$1,155 $687 $(52)$1,790 $1,132 $654 $(62)$1,724 
Schedule of Available-for-Sale Debt Securities With Unrealized Losses The aggregate fair value of available-for-sale debt securities with unrealized losses as of June 30, 2025 was:
Fair ValueUnrealized Losses
Corporate debt securities$32 $(1)
Municipal debt securities71(2)
U.S. Government debt securities48(1)
Debt securities in unrealized loss position$151 $(5)
Schedule of Maturities for Available-for-Sale Debt Securities
The contractual maturities for available-for-sale debt securities presented on the Consolidated Balance Sheets were:
June 30,
2025		December 31,
2024
Maturities within one year$66 $82 
Maturities within two to five years196 220 
Maturities thereafter356 309 
Debt securities, fair value$617 $611 
Schedule of Sales Proceeds, Gains, and Losses for Available-for-Sale Debt Securities
The sales proceeds, gains, and losses for available-for-sale debt securities for the periods were:
 Three Months Ended June 30,Six Months Ended June 30,
2025202420252024
Sales proceeds of NDT funds investments (a)
$592 $535 $1,168 $1,034 
Gross realized gains4 2 7 5 
Gross realized losses(3)(3)(5)(6)
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(a)Sales proceeds are used to pay income taxes and trust management fees. Remaining proceeds are reinvested in the NDT.