XML 48 R36.htm IDEA: XBRL DOCUMENT v3.24.3
Other Noncurrent Liabilities (Tables)
 12 Months Ended
Dec. 31, 2023
Other Liabilities Disclosure [Abstract]  
Other Noncurrent Liabilities
Other non-current liabilities consisted of the following:
December 31, 2023December 31, 2022
Asset retirement obligations$84 $81 
Accrued environmental expense, long-term12 12 
Other20 18 
Other non-current liabilities$116 $111 
Schedule of Change in Asset Retirement Obligation Changes in the carrying amount of asset retirement obligations for the years ended December 31, 2023 and 2022 were as follows:
Year Ended December 31,
20232022
Balance at beginning of year$81 $79 
Liabilities incurred— — 
Liabilities settled(1)(2)
Accretion expense4 4 
Balance at end of year$84 $81