Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred tax liabilities
Properties, plant and equipment	$ 18,295	$ 17,169
Investments and other	4,492	4,105
Total deferred tax liabilities	22,787	21,274
Deferred tax assets
Foreign tax credits	(12,599)	(11,718)
Asset retirement obligations/environmental reserves	(4,518)	(4,553)
Employee benefits	(2,087)	(3,037)
Deferred credits	(446)	(996)
Tax loss carryforwards	(3,887)	(4,175)
Other accrued liabilities	(746)	(239)
Inventory	(219)	(289)
Operating leases	(1,134)	(1,255)
Miscellaneous	(4,057)	(3,657)
Total deferred tax assets	(29,693)	(29,919)
Deferred tax assets valuation allowance	19,532	17,651
Total deferred taxes, net	12,626	9,006
Classification of deferred taxes
Deferred charges and other assets	(4,505)	(5,659)
Noncurrent deferred income taxes	17,131	14,665
Total deferred income taxes, net	$ 12,626	$ 9,006