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Note 7 - Income Taxes - Schedule of Deferred Income Tax Assets (Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Deferred income tax liabilities:    
Property $ (12,987) $ (12,910)
Operating lease assets (404) (411)
Other (556) (591)
Total deferred income tax liabilities (13,947) (13,912)
Deferred income tax assets:    
Operating lease liabilities 394 401
Accrued casualty costs 168 164
Accrued wages 50 50
Stock compensation 26 26
Other 186 238
Total deferred income tax assets 824 879
Net deferred income tax liability $ (13,123) $ (13,033)