Derivative Financial Instruments - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments, Gain (Loss)
Cost	$ 6,729	$ 6,677	$ 20,446	$ 20,784
SG&A expense	4,458	4,391	14,212	13,843
Other (income) and expense	(215)	5,755	(721)	5,921
Interest expense	412	295	1,202	903
Cost of services
Derivative Instruments, Gain (Loss)
Cost	5,217	5,168	15,821	15,915
Gains/(losses) of total hedge activity	(2)	4	(6)	32
Cost of sales
Derivative Instruments, Gain (Loss)
Cost	1,419	1,389	4,329	4,555
Gains/(losses) of total hedge activity	(5)	35	12	71
Cost of financing
Derivative Instruments, Gain (Loss)
Cost	94	120	297	314
Gains/(losses) of total hedge activity	(3)	1	(10)	0
SG&A expense
Derivative Instruments, Gain (Loss)
SG&A expense	4,458	4,391	14,212	13,843
Gains/(losses) of total hedge activity	(58)	(69)	44	(291)
Other (income) and expense
Derivative Instruments, Gain (Loss)
Other (income) and expense	(215)	5,755	(721)	5,921
Gains/(losses) of total hedge activity	(316)	(189)	(315)	(730)
Interest expense
Derivative Instruments, Gain (Loss)
Interest expense	412	295	1,202	903
Gains/(losses) of total hedge activity	$ (15)	$ 4	$ (46)	$ 1