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Asset Retirement Obligations
 6 Months Ended
Jun. 30, 2025
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations Asset Retirement Obligations
Activity related to the Company’s asset retirement obligations is as follows:
Six Months Ended 
June 30,
(In millions)20252024
Balance at beginning of period$302 $289 
Liabilities incurred5 4
Liabilities settled — (1)
Liabilities assumed in acquisitions19 — 
Accretion expense7 6
Balance at end of period333 298 
Less: current asset retirement obligations(17)(12)
Noncurrent asset retirement obligations$316 $286