Derivative Financial Instruments and Risk Management - Location and Fair Value of Derivative Instruments Reported in the Consolidated Statements of Financial Position (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Derivatives, Fair Value
Derivative assets	$ 234	$ 296
Derivative liabilities	(150)	(171)
Designated derivatives
Derivatives, Fair Value
Derivative assets	175	283
Derivative liabilities	(111)	(100)
Designated derivatives | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	141	229
Derivative liabilities	(90)	(94)
Designated derivatives | Interest rate contracts
Derivatives, Fair Value
Derivative assets	34	54
Derivative liabilities	(21)	(6)
Undesignated derivatives
Derivatives, Fair Value
Derivative assets	59	13
Derivative liabilities	(39)	(71)
Undesignated derivatives | Foreign exchange contracts
Derivatives, Fair Value
Derivative assets	59	13
Derivative liabilities	$ (39)	$ (71)