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Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of ARO Obligations and Related Additions, Reductions and Accretion
The following table presents the balance of ARO obligations as of December 31, 2024 and 2023, along with the activity related to the Company's ARO obligations for the year ended December 31, 2024:
(In millions)
Total(a)
Balance as of December 31, 2023$407 
Revisions in estimates for current obligations
Additions
Spending for current obligations(35)
Accretion25 
Balance as of December 31, 2024$409 
(a)Total accretion expense related to asset retirement obligations included in the consolidated statement of cash flows includes accretion and revisions in estimates for asset retirement liabilities on non-operating plants