Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Accounts payable:
Accounts and wages payable	$ 1,083	$ 985
Due to Conrail	297	243
Casualty and other claims	214	216
Vacation liability	152	146
Other	117	114
Total	1,863	1,704
Other current liabilities:
Current Eastern Ohio incident liability	609	585
Interest payable	199	204
Current operating lease liability	70	81
Pension benefit obligations	22	21
Other	65	58
Total	$ 965	$ 949