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Income Taxes - Schedule of Deferred Income Tax Assets (Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Deferred income tax liabilities:    
Property $ (13,020) $ (12,987)
Operating lease assets (314) (404)
Other (581) (556)
Total deferred income tax liabilities (13,915) (13,947)
Deferred income tax assets:    
Operating lease liabilities 308 394
Accrued casualty costs 172 168
Accrued wages 51 50
Stock compensation 28 26
Other 205 186
Total deferred income tax assets 764 824
Net deferred income tax liability $ (13,151) $ (13,123)