Casualty, Environmental and Other Reserves - Schedule of Casualty, Environmental and Other Reserves (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Loss Contingencies [Line Items]
Current	$ 113	$ 118
Long-term	317	250
Total	430	368
Total Casualty
Loss Contingencies [Line Items]
Current	38	44
Long-term	152	136
Total	190	180
Personal Injury
Loss Contingencies [Line Items]
Current	31	37
Long-term	95	81
Total	126	118
Occupational
Loss Contingencies [Line Items]
Current	7	7
Long-term	57	55
Total	64	62
Environmental
Loss Contingencies [Line Items]
Current	40	37
Long-term	116	71
Total	156	108
Other
Loss Contingencies [Line Items]
Current	35	37
Long-term	49	43
Total	$ 84	$ 80