Derivative Financial Instruments - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021		Sep. 30, 2022	Sep. 30, 2021
Derivative Instruments, Gain (Loss)
Cost	$ 6,677	$ 6,145	[1]	$ 20,784	$ 18,670	[1]
SG&A expense	4,391	4,306	[1]	13,843	13,842	[1]
Other (income) and expense	5,755	244	[1]	5,921	891	[1]
Interest expense	295	290	[1]	903	852	[1]
Cost of services
Derivative Instruments, Gain (Loss)
Cost	5,168	4,650		15,915	14,014
Gains/(losses) of total hedge activity	4	12		32	33
Cost of sales
Derivative Instruments, Gain (Loss)
Cost	1,389	1,363		4,555	4,241
Gains/(losses) of total hedge activity	35	1		71	(30)
Cost of financing
Derivative Instruments, Gain (Loss)
Cost	120	132		314	416
Gains/(losses) of total hedge activity	1	(1)		0	1
SG&A expense
Derivative Instruments, Gain (Loss)
SG&A expense	4,391	4,306		13,843	13,842
Gains/(losses) of total hedge activity	(69)	(14)		(291)	88
Other (income) and expenses
Derivative Instruments, Gain (Loss)
Other (income) and expense	5,755	244		5,921	891
Gains/(losses) of total hedge activity	(189)	(7)		(730)	(246)
Interest expense
Derivative Instruments, Gain (Loss)
Interest expense	295	290		903	852
Gains/(losses) of total hedge activity	$ 4	$ (2)		$ 1	$ 3

[1] Reclassified to reflect discontinued operations presentation.