Financial Instruments - Derivative Notional Amounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Foreign exchange contracts \| Derivatives not designated as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal	$ 56,085	$ 44,227
Foreign exchange contracts \| Cash flow hedges \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal	23,852	20,315
Foreign exchange contracts \| Fair value hedges \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal	0	1,562
Foreign exchange contracts \| Net investment hedges \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal	$ 14,203	6,986
Credit derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Term	15 years
Credit derivatives \| Derivatives not designated as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal	$ 16,940	0
Other contracts \| Derivatives not designated as hedging instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Notional principal	$ 15,900	$ 15,082