Derivative Financial Instruments and Risk Management - Schedule of Gains (Losses) on Derivatives Instruments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivative Instruments, Gain (Loss)
Gains (Losses) Recognized on Hedged Instruments	$ 34	$ (141)	$ 11	$ (182)
Gains (Losses) Recognized in AOCI	(16)	64	(105)	58
Gains (Losses) Reclassified from AOCI	(42)	74	(146)	83
Designated derivatives | Cash Flow Hedges | Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Gains (Losses) Recognized on Hedged Instruments	0	0	0	0
Gains (Losses) Recognized in AOCI, Cash Flow Hedges	(24)	67	(131)	63
Gains (Losses) Reclassified from AOCI, Cash Flow Hedges	(40)	74	(142)	82
Designated derivatives | Cash Flow Hedges | Interest rate contracts
Derivative Instruments, Gain (Loss)
Gains (Losses) Recognized on Hedged Instruments	0	0	0	0
Gains (Losses) Recognized in AOCI, Cash Flow Hedges	13	(1)	34	(3)
Gains (Losses) Reclassified from AOCI, Cash Flow Hedges	2	1	3	2
Designated derivatives | Fair Value Hedges | Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Gains (Losses) Recognized on Hedged Instruments	0	0	0	0
Gains (Losses) Recognized in AOCI, Fair Value Hedges	(5)	(2)	(8)	(2)
Gains (Losses) Reclassified from AOCI, Fair Value Hedges	(4)	(1)	(7)	(1)
Designated derivatives | Fair Value Hedges | Interest rate contracts
Derivative Instruments, Gain (Loss)
Gains (Losses) Recognized on Hedged Instruments	4	(9)	8	(16)
Gains (Losses) Recognized in AOCI, Fair Value Hedges	0	0	0	0
Gains (Losses) Reclassified from AOCI, Fair Value Hedges	0	0	0	0
Undesignated derivatives | Foreign exchange contracts
Derivative Instruments, Gain (Loss)
Gains (Losses) Recognized on Hedged Instruments	$ 30	$ (132)	$ 3	$ (166)