Derivative Financial Instruments - Schedule of the Fair Values of Derivative Financial Instruments (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative assets	$ 26,199	$ 29,468
Derivative liabilities	26,440	29,124
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative assets	26,154	29,439
Derivative liabilities	26,239	28,904
Other derivative contracts
Derivatives, Fair Value [Line Items]
Derivative assets		1
Interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative assets	45	28
Derivative liabilities	7	1
Derivatives not designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative assets	26,154	29,117
Derivative liabilities	26,064	29,123
Derivatives not designated as hedging instruments \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative assets	26,154	29,116
Derivative liabilities	25,870	28,904
Derivatives not designated as hedging instruments \| Other derivative contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	1
Derivative liabilities	194	219
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Derivative assets	45	351
Derivative liabilities	376	1
Derivatives designated as hedging instruments \| Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Derivative assets	0	323
Derivative liabilities	369	0
Derivatives designated as hedging instruments \| Interest rate contracts
Derivatives, Fair Value [Line Items]
Derivative assets	45	28
Derivative liabilities	$ 7	$ 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.

+ References + Details