Derivative Financial Instruments - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021		Jun. 30, 2022	Jun. 30, 2021
Derivative Instruments, Gain (Loss)
Cost	$ 7,246	$ 6,366	[1]	$ 14,107	$ 12,526	[1]
SG&A expense	4,855	4,849	[1]	9,452	9,536	[1]
Other (income) and expense	(81)	302	[1]	166	647	[1]
Interest expense	297	281	[1]	607	561	[1]
Cost of services
Derivative Instruments, Gain (Loss)
Cost	5,399	4,720		10,747	9,364
Gains/(losses) of total hedge activity	13	7		28	21
Cost of sales
Derivative Instruments, Gain (Loss)
Cost	1,750	1,499		3,165	2,878
Gains/(losses) of total hedge activity	23	(10)		35	(32)
Cost of financing
Derivative Instruments, Gain (Loss)
Cost	96	146		194	283
Gains/(losses) of total hedge activity	1	0		(1)	2
SG&A expense
Derivative Instruments, Gain (Loss)
SG&A expense	4,855	4,849		9,452	9,536
Gains/(losses) of total hedge activity	(152)	67		(223)	101
Other (income) and expenses
Derivative Instruments, Gain (Loss)
Other (income) and expense	(81)	302		166	647
Gains/(losses) of total hedge activity	(439)	(79)		(541)	(239)
Interest expense
Derivative Instruments, Gain (Loss)
Interest expense	297	281		607	561
Gains/(losses) of total hedge activity	$ 3	$ (1)		$ (3)	$ 4

[1] Reclassified to reflect discontinued operations presentation.