Financial Instruments - Location and Amount of Pretax (Gains) Losses of Derivatives (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) [Line Items]
Sales	$ 14,593	$ 11,402	$ 30,494	$ 22,029
Other (income) expense, net	438	(103)	1,148	(558)
Other comprehensive income (loss)	42	1,545	102	1,557
Interest rate swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI on derivatives	0	0	(1)	(1)
Interest rate swap contracts | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Hedged items	(4)	(9)	(14)	(19)
Derivatives designated as hedging instruments	1	(1)	4	0
Amount of gain recognized in Other (income) expense, net on derivatives	0	0	(1)	(1)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in OCI on derivatives	403	(58)	551	121
Increase (decrease) in Sales as a result of AOCL reclassifications	(172)	71	(239)	183
Foreign exchange contracts | Reclassification out of Accumulated Other Comprehensive Income | Accumulated Gain (Loss), Cash Flow Hedge, Including Noncontrolling Interest
Derivative Instruments, Gain (Loss) [Line Items]
Sales	$ 172	$ (71)	$ 239	$ (183)