Derivative Financial Instruments - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss)
Cost	$ 6,743	$ 6,862
SG&A expense	4,853	4,597
Other (income) and expense	(245)	246
Interest expense	367	311
Cost of services
Derivative Instruments, Gain (Loss)
Cost	5,310	5,349
Gains/(losses) of total hedge activity	(2)	15
Cost of sales
Derivative Instruments, Gain (Loss)
Cost	1,322	1,415
Gains/(losses) of total hedge activity	14	12
Cost of financing
Derivative Instruments, Gain (Loss)
Cost	110	98
Gains/(losses) of total hedge activity	(3)	(2)
SG&A expense
Derivative Instruments, Gain (Loss)
SG&A expense	4,853	4,597
Gains/(losses) of total hedge activity	59	(70)
Other (income) and expenses
Derivative Instruments, Gain (Loss)
Other (income) and expense	(245)	246
Gains/(losses) of total hedge activity	142	(102)
Interest expense.
Derivative Instruments, Gain (Loss)
Interest expense	367	311
Gains/(losses) of total hedge activity	$ (14)	$ (6)