Derivative Instruments (Forward Currency Exchange Contracts) (Details) - Foreign currency exchange forward contracts $ in Millions, € in Billions	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 EUR (€)
Derivative [Line Items]
Notional amount	$ 8,751	$ 8,159
Maximum term	4 years 10 months 24 days	4 years 10 months 24 days
Derivative, fair value, net	$ 195	$ (140)
Other current assets
Derivative [Line Items]
Derivative asset	146	16
Other noncurrent assets
Derivative [Line Items]
Derivative asset	66	4
Other current liabilities
Derivative [Line Items]
Derivative liability	(17)	(133)
Other noncurrent liabilities
Derivative [Line Items]
Derivative liability		(27)
Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	2,266	1,828	€ 2.0	€ 1.5
Derivative, fair value, net	104	(22)
Designated as Hedging Instrument | Other current assets
Derivative [Line Items]
Derivative asset	39	0
Designated as Hedging Instrument | Other noncurrent assets
Derivative [Line Items]
Derivative asset	65	4
Designated as Hedging Instrument | Other current liabilities
Derivative [Line Items]
Derivative liability	0	0
Designated as Hedging Instrument | Other noncurrent liabilities
Derivative [Line Items]
Derivative liability		(26)
Not Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	5,512	5,382
Derivative, fair value, net	82	(114)
Not Designated as Hedging Instrument | Other current assets
Derivative [Line Items]
Derivative asset	92	7
Not Designated as Hedging Instrument | Other noncurrent assets
Derivative [Line Items]
Derivative asset	0	0
Not Designated as Hedging Instrument | Other current liabilities
Derivative [Line Items]
Derivative liability	(10)	(121)
Not Designated as Hedging Instrument | Other noncurrent liabilities
Derivative [Line Items]
Derivative liability		0
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Notional amount	973	949
Derivative, fair value, net	9	(4)
Cash Flow Hedging | Designated as Hedging Instrument | Other current assets
Derivative [Line Items]
Derivative asset	15	9
Cash Flow Hedging | Designated as Hedging Instrument | Other noncurrent assets
Derivative [Line Items]
Derivative asset	1	0
Cash Flow Hedging | Designated as Hedging Instrument | Other current liabilities
Derivative [Line Items]
Derivative liability	$ (7)	(12)
Cash Flow Hedging | Designated as Hedging Instrument | Other noncurrent liabilities
Derivative [Line Items]
Derivative liability		$ (1)