Taxes - Summary of Unrecognized Income Tax Benefits and Taxes Other Than on Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes to company's unrecognized tax benefits
Balance at January 1	$ 5,018	$ 4,987	$ 5,070
Foreign currency effects	(1)
Foreign currency effects		2	1
Additions based on tax positions taken in current year	194	253	94
Additions for tax positions taken in prior years	218	437	313
Reductions for tax positions taken in prior years	(36)	(216)	(194)
Settlements with taxing authorities in current year	(18)	(429)	(78)
Reductions as a result of a lapse of the applicable statute of limitations	(87)	(16)	(219)
Balance at December 31	5,288	5,018	4,987
Income Tax Authority [Line Items]
Import duties and other levies	6,840	4,499	4,136
Total taxes other than on income	6,840	4,499	4,136
United States
Income Tax Authority [Line Items]
Import duties and other levies	7	7	2
Property and other miscellaneous taxes	3,378	2,248	1,785
Payroll taxes	302	235	254
Taxes on production	628	317	355
Total taxes other than on income	4,315	2,807	2,396
International
Income Tax Authority [Line Items]
Import duties and other levies	49	39	35
Property and other miscellaneous taxes	2,225	1,461	1,435
Payroll taxes	113	117	125
Taxes on production	138	75	145
Total taxes other than on income	$ 2,525	$ 1,692	$ 1,740