Derivative Financial Instruments and Risk Management (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ (13)	$ 421	$ 209
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	10	(384)	(166)
Not Designated as Hedging Instrument [Member] | Fair Value Hedges
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(114)	(118)	113
Not Designated as Hedging Instrument [Member] | Fair Value Hedges | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(39)	(111)	89
Not Designated as Hedging Instrument [Member] | Fair Value Hedges | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss)
Gains (Losses) on Derivatives Not Designated as Hedging Instruments	(75)	(7)	24
Designated as Hedging Instrument [Member] | Cash flow hedges
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(13)	421	209
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(10)	384	166
Designated as Hedging Instrument [Member] | Cash flow hedges | Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(22)	310	190
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(68)	370	194
Designated as Hedging Instrument [Member] | Cash flow hedges | Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	9	111	19
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	$ 58	$ 14	$ (28)