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Income Taxes - Schedule Of Deferred Tax Assets And Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Accruals, including casualty and other claims $ 110 $ 92
Compensation and benefits, including postretirement benefits 99 181
Other 164 188
Total gross deferred tax assets 373 461
Less valuation allowance (41) (60)
Net deferred tax assets 332 401
Deferred tax liabilities:    
Property (7,050) (7,016)
Other (547) (550)
Total deferred tax liabilities (7,597) (7,566)
Deferred income taxes $ (7,265) $ (7,165)