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Income Effect of Derivative Financial Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Derivative [Line Items]
Gain/(Loss) Recognized in Income	$ 9	$ 46
Held collateral	102		$ 26
Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member] \| Foreign currency exchange contracts [Member]
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCI to Income	(90)	(15)
Gains/(losses) on derivative instruments	(128)	(461)
Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member] \| Commodity Contract [Member]
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCI to Income	58	8
Gains/(losses) on derivative instruments	284	80
Designated as Hedging Instrument [Member] \| Fair Value Hedging [Member] \| Cross-currency interest rate swap contracts [Member]
Derivative [Line Items]
Net interest settlements and accruals on hedging instruments	(3)	(3)
Fair value changes on hedging instruments	(37)	(50)
Fair value changes on hedged debt	41	44
Designated as Hedging Instrument [Member] \| Fair Value Hedging [Member] \| Interest rate contracts [Member]
Derivative [Line Items]
Net interest settlements and accruals on hedging instruments	76	101
Fair value changes on hedging instruments	(986)	(641)
Fair value changes on hedged debt	991	590
Not Designated as Hedging Instrument [Member] \| Foreign currency exchange contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(46)	233
Not Designated as Hedging Instrument [Member] \| Foreign currency exchange contracts [Member] \| Nonoperating Income (Expense) [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(2)	52
Not Designated as Hedging Instrument [Member] \| Foreign currency exchange contracts [Member] \| Cost of Sales
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(44)	181
Not Designated as Hedging Instrument [Member] \| Commodity Contract [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	109	55
Not Designated as Hedging Instrument [Member] \| Cross-currency interest rate swap contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	(227)	(245)
Not Designated as Hedging Instrument [Member] \| Interest rate contracts [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in Income	$ 123	$ (31)