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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Personal Injury Liability Activity
Our personal injury liability activity was as follows:
Millions202420232022
Beginning balance$383 $361 $325 
Current year accruals121 112 107 
Changes in estimates for prior years(14)89 55 
Payments(111)(179)(126)
Ending balance at December 31$379 $383 $361 
Current portion, ending balance at December 31$106 $113 $84 
Schedule of Environmental Liability Activity
Our environmental liability activity was as follows:
Millions202420232022
Beginning balance$245 $253 $243 
Accruals129 99 84 
Payments(106)(107)(74)
Ending balance at December 31$268 $245 $253 
Current portion, ending balance at December 31$83 $91 $67