Derivatives - Schedule of Gains (Losses) Related to Cash Flow Hedges (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Foreign currency forwards
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives	$ (169)	$ 183
Hedged Items	167	(190)
Net	(2)	(7)
Foreign currency forwards \| Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized in income through amortization approach	82	67
Recognized in income through changes in fair value	20	9
Gains (losses) excluded from the assessment of hedge effectiveness recognized in OCI	(45)	20
Foreign currency swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives	(159)	286
Hedged Items	169	(310)
Net	10	(24)
Foreign currency swaps \| Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized in income through amortization approach	0	0
Recognized in income through changes in fair value	0	0
Gains (losses) excluded from the assessment of hedge effectiveness recognized in OCI	(187)	88
Foreign currency interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives	282	(622)
Hedged Items	(269)	632
Net	13	10
Foreign currency interest rate swaps \| Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized in income through amortization approach	0	0
Recognized in income through changes in fair value	0	0
Interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives	111	(332)
Hedged Items	(118)	323
Net	(7)	(9)
Interest rate swaps \| Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized in income through amortization approach	0	0
Recognized in income through changes in fair value	0	0
Foreign currency interest rate swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivatives	57	52
Hedged Items	(60)	(53)
Net	(3)	(1)
Foreign currency interest rate swaps \| Fair Value Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Recognized in income through amortization approach	0	0
Recognized in income through changes in fair value	$ 0	$ 0

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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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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Amount of gain (loss) from excluded component of derivative hedge, recognized in earnings. Excludes recognition under systematic and rational method.

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Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

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Amount, before tax, of adjustments from accumulated other comprehensive income (AOCI) for gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.

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Amount, before tax and adjustments, of gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method.

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