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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
Schedule II — Valuation and Qualifying Accounts
Year ended December 31
Millions of Dollars202420232022
Employee Termination Benefits
Balance at January 1$6 $11 $43 
Additions (reductions) charged to expense987 (2)1 
Payments(3)(3)(33)
Balance at December 31 $990 $6 $11 
Expected Credit Losses
Beginning allowance balance for expected credit losses$641 $1,008 $745 
Current period provision(30)(367)263 
Write-offs charged against the allowance, if any— — — 
Balance at December 31 $611 $641 $1,008 
Deferred Income Tax Valuation Allowance*
Balance at January 1$20,416 $19,532 $17,651 
Additions to deferred income tax expense1,881 2,348 3,533 
Reduction of deferred income tax expense(984)(1,464)(1,652)
Balance at December 31 $21,313 $20,416 $19,532 
* See also Note 17 Taxes.