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Derivative Instruments - Cumulative Fair Value of Hedge Adjustments (Details) - Fair Value Hedging - Derivatives designated as hedges - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Foreign currency forwards | Foreign currency forwards
Derivative [Line Items]
Carrying amount of the hedged assets or liabilities	$ 5,259	$ 4,224
Cumulative amount of fair value hedging gains (losses), AFS securities	(217)	(136)
Foreign currency forwards | Swaps
Derivative [Line Items]
Carrying amount of the hedged assets or liabilities	4,797	0
Cumulative amount of fair value hedging gains (losses), AFS securities	(398)	0
Interest sensitive contract liabilities | Swaps
Derivative [Line Items]
Carrying amount of the hedged assets or liabilities	1,081	0
Cumulative amount of fair value hedging gains (losses), AFS securities	88	0
Interest sensitive contract liabilities | Cross Currency Interest Rate Contract
Derivative [Line Items]
Carrying amount of the hedged assets or liabilities	4,348	2,773
Cumulative amount of fair value hedging gains (losses), AFS securities	632	121
Interest sensitive contract liabilities | Interest rate swaps
Derivative [Line Items]
Carrying amount of the hedged assets or liabilities	6,577	500
Cumulative amount of fair value hedging gains (losses), AFS securities	323	0
Mortgage Loans, Net | Foreign currency forwards
Derivative [Line Items]
Carrying amount of the hedged assets or liabilities	0	1,686
Cumulative amount of fair value hedging gains (losses), AFS securities	$ 0	$ (44)

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- Definition

Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

+ References

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- Definition

Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4EE
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109999712-113959

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