v3.26.1
Casualty, Environmental and Other Reserves - Schedule of Balance Sheet Presentation (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Contingencies [Line Items]    
Current $ 182 $ 184
Long-term 300 295
Total 482 479
Total Casualty    
Contingencies [Line Items]    
Current 66 66
Long-term 155 147
Total 221 213
Personal Injury    
Contingencies [Line Items]    
Current 60 60
Long-term 103 94
Total 163 154
Occupational    
Contingencies [Line Items]    
Current 6 6
Long-term 52 53
Total 58 59
Environmental    
Contingencies [Line Items]    
Current 50 49
Long-term 98 107
Total 148 156
Other    
Contingencies [Line Items]    
Current 66 69
Long-term 47 41
Total $ 113 $ 110