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Nuclear Decommissioning (Tables)
9 Months Ended
Sep. 30, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligation
The following table provides a rollforward of the nuclear decommissioning AROs reflected in the Consolidated Balance Sheets from December 31, 2023 to September 30, 2024:
Balance as of December 31, 2023(a)
$13,891 
Net decrease due to changes in, and timing of, estimated future cash flows
(2,275)
Accretion expense488 
ARO transferred to Liabilities held for sale
(22)
Costs incurred related to decommissioning plants(21)
Balance as of September 30, 2024(a)
$12,061 
__________
(a)Includes $14 million and $30 million as the current portion of the ARO as of September 30, 2024 and December 31, 2023, respectively, which is included in Other current liabilities in the Consolidated Balance Sheets.
Related Party Transactions - Noncurrent Receivables from/Payables to affiliates
The following table presents our noncurrent payables to ComEd, PECO, CenterPoint, and AEP Texas reflected as Payables related to Regulatory Agreement Units in the Consolidated Balance Sheets as of September 30, 2024 and December 31, 2023:
September 30, 2024December 31, 2023
ComEd$3,983 $2,955 
PECO338 278 
CenterPoint
375 338 
AEP Texas
132 117 
Payables related to Regulatory Agreement Units$4,828 $3,688