Derivatives and Hedge Accounting - Narrative (Details) - USD ($)	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Credit derivatives:
Reclassification into interest expense	$ 7,000,000	$ 7,000,000
Amounts to be reclassified in the next 30 years	$ 167,000,000
Cash flow hedge term, maximum	30 years
Amounts to be reclassified in the next twelve months	$ 28,000,000
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships	(18,000,000)
Fair value of hybrid securities	0		$ 0
Par value of hybrid securities	25,000,000		25,000,000
Currency Swap
Credit derivatives:
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships	2,000,000	$ (1,000,000)
Net Investment Income
Credit derivatives:
Foreign currency translation gain (loss) adjustment related to net investment hedge relationships	(3,000,000)
Nonrelated Party
Credit derivatives:
Collateral posted	1,000,000,000		1,400,000,000
Collateral obtained from third parties for derivative transactions	2,600,000,000		1,900,000,000
Affiliated Entity
Credit derivatives:
Collateral posted	0		0
Collateral obtained from third parties for derivative transactions	$ 220,000,000		$ 377,000,000

Cash Flow Hedge Gain (Loss) to be Reclassified After 12 Months

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Cash Flow Hedge, Term Of Agreement

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No definition available.

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- Definition

Par value as of the balance sheet date of hybrid instruments.

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No definition available.

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- Definition

The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
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- Definition

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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.

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No definition available.

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Fair value as of the balance sheet date of hybrid instruments.

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- Definition

Amount, before tax, of reclassification from accumulated other comprehensive income (AOCI) for gain (loss) from derivative designated and qualifying as net investment hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4CCC
-Subparagraph (b)
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- Definition

Amount, before tax, of increase (decrease) in the cumulative translation adjustment from gain (loss) on foreign currency derivatives that are designated as, and are effective as, economic hedges of a net investment in a foreign entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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