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Asset Retirement Obligations
 9 Months Ended
Sep. 30, 2024
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations Asset Retirement Obligations
Activity related to the Company’s asset retirement obligations is as follows:
(In millions)Nine Months Ended 
September 30, 2024
Balance at beginning of period$289 
Liabilities incurred6 
Liabilities settled (2)
Accretion expense8 
Balance at end of period301 
Less: current asset retirement obligations(13)
Noncurrent asset retirement obligations$288