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Asset Retirement Obligations
 3 Months Ended
Mar. 31, 2022
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)Three Months Ended 
March 31, 2022
Balance at beginning of period$263 
Liabilities incurred3 
Liabilities settled (1)
Liabilities divested(2)
Accretion expense2 
Balance at end of period265 
Less: current asset retirement obligations(3)
Noncurrent asset retirement obligations$262