Derivative Instruments and Hedging Activities (Assets and LIabilities - Designated vs. Not Designated Hedging Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 233	$ 189
Total liability derivatives	384	679
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	92	60
Total liability derivatives	333	518
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	141	129
Total liability derivatives	51	161
Interest Rate Contract
Derivatives, Fair Value [Line Items]
Total asset derivatives	53	13
Total liability derivatives	294	610
Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	53	13
Total liability derivatives	288	506
Interest Rate Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	0
Total liability derivatives	6	104
Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	5	5
Total liability derivatives	11	4
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	5	5
Total liability derivatives	11	4
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	0
Total liability derivatives	0	0
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	137	161
Total liability derivatives	35	43
Foreign Exchange Contract [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	28	40
Total liability derivatives	23	8
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	109	121
Total liability derivatives	12	35
Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	38	10
Total liability derivatives	44	22
Commodity Contract [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	6	2
Total liability derivatives	11	0
Commodity Contract [Member] | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	32	8
Total liability derivatives	33	22
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Noncurrent	148	138
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Current	$ 85	$ 51