Derivative Financial Instruments and Risk Management (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI	$ 209	$ (153)	$ 23
Amount of Gains (Losses) Reclassified from AOCI	(166)	184	(62)
Interest Expense	455	591	787
Other income (expense)	(23)	(25)	(24)
Designated derivatives | Cash flow hedges
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI	209	(153)	23
Amount of Gains (Losses) Reclassified from AOCI	166	(184)	62
Designated derivatives | Cash flow hedges | Interest rate contracts | Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI	19	(23)	(70)
Amount of Gains (Losses) Reclassified from AOCI	(28)	(52)	(8)
Interest Expense	455	591	787
Designated derivatives | Cash flow hedges | Cross currency contracts | Interest expense
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Reclassified from AOCI	(5)	32	33
Interest Expense	455	591	787
Designated derivatives | Cash flow hedges | Cross currency contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Amount of Gains (Losses) Recognized in AOCI	190	(130)	93
Amount of Gains (Losses) Reclassified from AOCI	199	(164)	37
Other income (expense)	(23)	(25)	(24)
Undesignated derivatives
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	89	(112)	(37)
Undesignated derivatives | Foreign exchange contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	89	(121)	(38)
Undesignated derivatives | Cross currency contracts | Other income (expense)
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	$ 0	$ 9	$ 1