Derivative Financial Instruments - Effect of Hedge Activity on Income and Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative Instruments, Gain (Loss)
Cost	$ 6,820	$ 6,974	$ 13,539	$ 13,717
SG&A expense	4,938	4,900	9,912	9,754
Other (income) and expense	(233)	(261)	(550)	(506)
Interest expense	427	423	859	790
Cost of services
Derivative Instruments, Gain (Loss)
Gains/(losses) of total hedge activity	9	(3)	14	(5)
Cost of sales
Derivative Instruments, Gain (Loss)
Gains/(losses) of total hedge activity	15	2	27	17
Cost of financing
Derivative Instruments, Gain (Loss)
Gains/(losses) of total hedge activity	(4)	(3)	(7)	(7)
SG&A expense
Derivative Instruments, Gain (Loss)
Gains/(losses) of total hedge activity	11	43	85	102
Other (income) and expense
Derivative Instruments, Gain (Loss)
Gains/(losses) of total hedge activity	(140)	(141)	(427)	1
Interest expense
Derivative Instruments, Gain (Loss)
Gains/(losses) of total hedge activity	(19)	(18)	(34)	(31)
Services
Derivative Instruments, Gain (Loss)
Cost	5,126	5,294	10,365	10,604
Sales
Derivative Instruments, Gain (Loss)
Cost	1,607	1,587	2,988	2,910
Financing
Derivative Instruments, Gain (Loss)
Cost	$ 86	$ 93	$ 186	$ 203