Derivative Financial Instruments - Schedule of the Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative assets	$ 10,909	$ 29,468
Derivative liabilities	10,890	29,124
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative assets	10,874	29,439
Derivative liabilities	10,709	28,904
Other derivative contracts
Derivatives, Fair Value [Line Items]
Derivative assets		1
Interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative assets	35	28
Derivative liabilities	3	1
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative assets	10,852	29,117
Derivative liabilities	10,820	29,123
Derivatives not designated as hedging instruments \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative assets	10,852	29,116
Derivative liabilities	10,642	28,904
Derivatives not designated as hedging instruments \| Other derivative contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	1
Derivative liabilities	178	219
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative assets	57	351
Derivative liabilities	70	1
Derivatives designated as hedging instruments \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative assets	22	323
Derivative liabilities	67	0
Derivatives designated as hedging instruments \| Interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative assets	35	28
Derivative liabilities	$ 3	$ 1

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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