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Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current Portion of Casualty and Other Claims Included in Accounts Payable      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning Balance $ 186 $ 170 $ 166
Expenses 72 51 43
Other Accounts  [1] 109 84 88
Deductions [2] (151) (119) 127
Ending Balance 216 186 170
Casualty and Other Claims Included in Other Liabilities      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Beginning Balance 221 218 170
Expenses [3] 152 153 147
Other Accounts  0 0 0
Deductions [4] (144) (150) 99
Ending Balance $ 229 $ 221 $ 218
[1] Includes revenue refunds and overcharges provided through deductions from operating revenues and transfers  
from other accounts.
[2] Payments and reclassifications to/from accounts payable.
[3] Includes adjustments for changes in estimates for prior years’ claims.
[4] Payments and reclassifications to/from other liabilities.