Casualty, Environmental and Other Reserves - Schedule of Balance Sheet Presentation (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023		Dec. 31, 2022	Dec. 31, 2021
Contingencies [Line Items]
Current	$ 149	$ 144	[1]
Long-term	313	296	[1]
Total	462	440		$ 436	$ 368
Casualty
Contingencies [Line Items]
Current	58	52
Long-term	150	143
Total	208	195		194	180
Personal Injury
Contingencies [Line Items]
Current	51	45
Long-term	91	83
Total	142	128
Occupational
Contingencies [Line Items]
Current	7	7
Long-term	59	60
Total	66	67
Environmental
Contingencies [Line Items]
Current	37	41
Long-term	114	113
Total	151	154		161	108
Other
Contingencies [Line Items]
Current	54	51
Long-term	49	40
Total	$ 103	$ 91		$ 81	$ 80

[1] See Note 20, Revision of Prior Period Financial Statements.