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Asset Retirement Obligations
 9 Months Ended
Sep. 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:
Nine Months Ended 
September 30,
(In millions)20252024
Balance at beginning of period$302 $289 
Liabilities incurred8 6
Liabilities settled (2)(2)
Liabilities assumed in acquisitions19 — 
Accretion expense11 8
Balance at end of period338 301 
Less: current asset retirement obligations(12)(13)
Noncurrent asset retirement obligations$326 $288