Hedging Transactions and Derivative Financial Instruments (Summary of Notional Values and Pretax Impact in Fair Values) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Reclassified from OCI	$ (193)	$ (222)	$ 407
Net investment hedging | Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, original notional amount	3,875	3,875
Derivative, notional amount outstanding	3,000	3,000
Gain (loss) recognized in OCI on derivatives and nonderivatives	225	130
Amounts Reclassified from OCI	0	0
Net investment hedging | Foreign currency denominated debt
Derivative Instruments, Gain (Loss) [Line Items]
Nonderivative hedging instruments	5,777	3,883
Net investment hedges, gain (loss), recognized in OCI	248	333
Amounts Reclassified from OCI	0	0
Cash flow hedging | Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, original notional amount	4,000	4,000
Derivative, notional amount outstanding	3,300	4,000
Gain (loss) recognized in OCI on derivatives and nonderivatives	378	542
Amounts Reclassified from OCI	(238)	(283)
Cash flow hedging | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, original notional amount	1,600	1,600
Derivative, notional amount outstanding	0	0
Gain (loss) recognized in OCI on derivatives and nonderivatives	0	(19)
Amounts Reclassified from OCI	3	3
Cash Flow and Net Investment Hedges
Derivative Instruments, Gain (Loss) [Line Items]
Original Notional Amount	15,252	13,358
Notional Amount Outstanding	12,077	10,883
Gain (loss) recognized in OCI on derivatives and nonderivatives	851	986
Amounts Reclassified from OCI	$ (235)	$ (280)