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Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Loss Contingencies by Contingency
The following table summarizes the activity in the Company’s accrued obligations for personal injury claims (in millions):
Nine Months Ended September 30,
20242023
Beginning balance$264 $263 
Accruals / changes in estimates75 59 
Payments(89)(74)
     Ending balance$250 $248 
Current portion of ending balance$85 $90 
Accrued Obligations for Environmental Matters
The following table summarizes the activity in the Company’s accrued obligations for environmental matters (in millions):
Nine Months Ended September 30,
20242023
Beginning balance$236 $247 
Accruals / changes in estimates4 6 
Payments(11)(14)
     Ending balance$229 $239 
Current portion of ending balance$35 $35