Derivatives and Hedge Accounting - Fair Value Hedging Relationships (Details) - Derivatives designated as hedging instruments - Fair value hedging - Foreign exchange contracts - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Derivative instruments gain (loss):
Gains/(losses) recognized in earnings on hedging derivatives	$ (1)	$ (58)
Gains/(losses) recognized in earnings for excluded components	(1)	(12)
Gains/(losses) recognized in earnings for hedged items	1	58
Net Impact	$ (1)	$ (12)

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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Net gain (loss) relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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