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Commitments and Contingencies (Tables)
 3 Months Ended
Mar. 31, 2025
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):
Three Months Ended March 31,
20252024
Beginning balance$265 $264 
Accruals / changes in estimates9 26 
Payments(35)(28)
     Ending balance$239 $262 
Current portion of ending balance$85 $85 
Accrued Obligations for Environmental Matters
The following table summarizes the activity in the Company’s accrued obligations for environmental matters (in millions):
Three Months Ended March 31,
20252024
Beginning balance$224 $236 
Accruals / changes in estimates1 — 
Payments(3)(4)
     Ending balance$222 $232 
Current portion of ending balance$35 $35