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, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Amounts Reclassified from OCI	$ (96)	$ 112	$ (193)
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	128	(148)
Amounts Reclassified from OCI	0	0
Net investment hedging | Foreign currency denominated debt
Derivative Instruments, Gain (Loss) [Line Items]
Nonderivative hedging instruments	3,042	4,263
Net investment hedges, gain (loss), recognized in OCI	249	(102)
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	2,600	3,300
Gain (loss) recognized in OCI on derivatives and nonderivatives	(4)	(214)
Amounts Reclassified from OCI	(111)	107
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	0
Amounts Reclassified from OCI	3	3
Cash flow and net investment hedges
Derivative Instruments, Gain (Loss) [Line Items]
Original Notional Amount	12,517	13,738
Notional Amount Outstanding	8,642	10,563
Gain (loss) recognized in OCI on derivatives and nonderivatives	373	(464)
Amounts Reclassified from OCI	$ (108)	$ 110