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Note 7 - Income Taxes - Schedule of Deferred Income Tax Assets (Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred income tax liabilities: |  |
Property | $ (12,910) | $ (12,657)
Operating lease assets | (411) | (441)
Other | (591) | (534)
Total deferred income tax liabilities | (13,912) | (13,632)
Deferred income tax assets: |  |
Operating lease liabilities | 401 | 434
Accrued casualty costs | 164 | 157
Accrued wages | 50 | 45
Stock compensation | 26 | 26
Retiree benefits | 0 | 39
Other | 238 | 256
Total deferred income tax assets | 879 | 957
Net deferred income tax liability | $ (13,033) | $ (12,675)

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