Fair Value of Financial Instruments - Changes in Unrealized Gains (Losses) Within Level 3 Financial Instruments Carried at Fair Value and Still Held (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	$ 1,376	$ 3,045	$ 4,883
Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Realized gain (loss)	Realized gain (loss)	Realized gain (loss)
Trading securities
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	$ 8	$ (81)	$ 4
Equity securities
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	(16)	56	43
Mortgage loans on real estate
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	(8)	(20)	12
Derivative investments
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	1	2	1,051
MRBs
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	2,200	3,183	3,729
Reinsurance-related embedded derivatives
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	(789)	0	0
Indexed annuity ceded embedded derivatives
Fair Value Assets and Liabilities Measured on Recurring Basis Level 3 Activity [Line Items]
Changes in unrealized gains (losses) included in net income	$ (20)	$ (95)	$ 44

Fair Value Assets And Liabilities Measured On Recurring Basis Level 3 Activity [Line Items]

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- Definition

Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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- Definition

Indicates line item in statement in which net income is reported that includes unrealized gain (loss) from liability measured at fair value using unobservable input (level 3) and still held.

+ References

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