Income Taxes (Tables)	12 Months Ended
Income Taxes (Tables)	Dec. 31, 2021
Income Taxes [Abstract]
Income taxes charged to income (loss)	Components of income tax provision (benefit) were: Millions of Dollars 2021 2020 2019 Income Taxes Federal Current $ 32 3 18 Deferred 1,161 (625) (113) Foreign Current 3,128 350 2,545 Deferred 66 (70) (323) State and local Current 127 (4) 148 Deferred 119 (139) (8) Total tax provision (benefit) $ 4,633 (485) 2,267
Components of deferred tax liabilities and assets	Deferred income taxes reflect the net tax effect of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for tax purposes. Major components of deferred tax liabilities and assets at December 31 were: Millions of Dollars 2021 2020 Deferred Tax Liabilities PP&E and intangibles $ 10,170 7,744 Inventory 44 64 Other 213 242 Total deferred tax liabilities 10,427 8,050 Deferred Tax Assets Benefit plan accruals 321 540 Asset retirement obligations and accrued environmental costs 2,297 2,262 Investments in joint ventures 1,684 1,653 Other financial accruals and deferrals 827 907 Loss and credit carryforwards 7,402 8,904 Other 399 365 Total deferred tax assets 12,930 14,631 Less: valuation allowance (8,342) (9,965) Total deferred tax assets net of valuation allowance 4,588 4,666 Net deferred tax liabilities $ 5,839 3,384
Reconciliation of deferred tax asset valuation allowance	The following table shows a reconciliation of the beginning and ending deferred tax asset valuation allowance for for 2021, 2020 and 2019: Millions of Dollars 2021 2020 2019 Balance at January 1 $ 9,965 10,214 3,040 Charged to expense (benefit) (45) 460 (225) Other* (1,578) (709) 7,399 Balance at December 31 $ 8,342 9,965 10,214 *Represents changes due to originating deferred tax asset that have no impact to our effective tax rate, acquisitions/dispositions/revisions and the effect of translating foreign financial statements.
Reconciliation of the beginning and ending unrecognized tax benefits	The following table shows a reconciliation of the beginning and ending unrecognized tax benefits for 2021, 2020 and 2019: Millions of Dollars 2021 2020 2019 Balance at January 1 $ 1,206 1,177 1,081 Additions based on tax positions related to the current year 15 6 9 Additions for tax positions of prior years 177 67 120 Reductions for tax positions of prior years (5) (34) (22) Settlements - (9) (9) Lapse of statute (48) (1) (2) Balance at December 31 $ 1,345 1,206 1,177
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The amounts of U.S. and foreign income (loss) before income taxes, with a reconciliation of tax at the federal statutory rate to the provision for income taxes, were: Millions of Dollars Percent of Pre-Tax Income (Loss) 2021 2020 2019 2021 2020 2019 Income (loss) before income taxes United States $ 8,024 (3,587) 4,704 63.1 % 114.2 49.4 Foreign 4,688 447 4,820 36.9 (14.2) 50.6 $ 12,712 (3,140) 9,524 100.0 % 100.0 100.0 Federal statutory income tax $ 2,670 (659) 2,000 21.0 % 21.0 21.0 Non-U.S. effective tax rates 1,915 194 1,399 15.1 (6.2) 14.7 Tax impact of debt restructuring 75 - - 0.6 - - Australia disposition - (349) - - 11.1 - U.K. disposition - - (732) - - (7.7) Recovery of outside basis (55) (22) (77) (0.4) 0.7 (0.8) Adjustment to tax reserves (11) 18 9 (0.1) (0.6) 0.1 Adjustment to valuation allowance (45) 460 (225) (0.4) (14.6) (2.4) State income tax 194 (112) 123 1.5 3.6 1.3 Malaysia Deepwater Incentive - - (164) - - (1.7) Enhanced oil recovery credit (99) (6) (27) (0.8) 0.2 (0.3) Other (11) (9) (39) (0.1) 0.3 (0.4) Tota l $ 4,633 (485) 2,267 36.4 % 15.5 23.8