v3.26.3
Casualty, Environmental and Other Reserves - Schedule of Balance Sheet Presentation (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Contingencies [Line Items]    
Current $ 185 $ 184
Long-term 294 295
Total 479 479
Total Casualty    
Contingencies [Line Items]    
Current 66 66
Long-term 154 147
Total 220 213
Personal Injury    
Contingencies [Line Items]    
Current 60 60
Long-term 101 94
Total 161 154
Occupational    
Contingencies [Line Items]    
Current 6 6
Long-term 53 53
Total 59 59
Environmental    
Contingencies [Line Items]    
Current 50 49
Long-term 92 107
Total 142 156
Other    
Contingencies [Line Items]    
Current 69 69
Long-term 48 41
Total $ 117 $ 110